Re: [lazarus] New bitmap components dialogs
Le 12/12/07, Dominique Louis [EMAIL PROTECTED] a écrit : Tres jolie. Dominique. In french great Thanks, End std palette... -- Laurent. My Components: http://wiki.lazarus.freepascal.org/Wile64 French Forum : http://lazforum-fr.tuxfamily.org/index.php attachment: tfinddialog.pngattachment: tfontdialog.pngattachment: treplacedialog.pngattachment: tselectdirectorydialog.png
Re: [lazarus] New bitmap components dialogs
wile64 пишет: thanks, commited in r13293 btw, how you want to select which TDataSource to use? Best regards, Paul Ishenin. _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] vote for bdd related component icon
If I count *3 votes for tdatasource.png **4 votes for tdatasource1.png **6 votes for tdatasource2.png* I propose a test with discs -- Laurent. My Components: http://wiki.lazarus.freepascal.org/Wile64 French Forum : http://lazforum-fr.tuxfamily.org/index.php
[lazarus] Making GTK Thread Safe
I've read something interesting in the GTK FAQ, it should be possible to make GTK apps thread safe if they are setup properly, assuming there are many multithreaded apps out there, i think this is really useful, instead of relying on synchronize or simulating Messages Queue with StringList, one could use CriticalSections with Controls and it would be really useful if LCL was as thread safe as possible at least the low level API part such as GTK, of course a full ThreadSafe LCL would be even better but that would probably require too much work. http://www.gtk.org/faq/#AEN482 Razvan _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] vote for bdd related component icon
On Dec 11, 2007 2:45 PM, Graeme Geldenhuys [EMAIL PROTECTED] wrote: I agree with John's explanation, which is why I vote for tdatasource.png. Trusted and known icon. Yes, the cylinder (Drum like) icon is good for DB but for Dataset it should be different and since Delphi has the Arrows and Grid icon, we should have a similar one i think ... Razvan _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] Making GTK Thread Safe
Razvan Adrian Bogdan wrote: I've read something interesting in the GTK FAQ, it should be possible to make GTK apps thread safe if they are setup properly, assuming there are many multithreaded apps out there, i think this is really useful, instead of relying on synchronize or simulating Messages Queue with StringList, one could use CriticalSections with Controls and it would be really useful if LCL was as thread safe as possible at least the low level API part such as GTK, of course a full ThreadSafe LCL would be even better but that would probably require too much work. The LCL won't be threadsafe, the overhead isn't worth the gain. Marc _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] vote for bdd related component icon
Me too. The traditional tdatasource.png On Dec 12, 2007 7:06 AM, Razvan Adrian Bogdan [EMAIL PROTECTED] wrote: On Dec 11, 2007 2:45 PM, Graeme Geldenhuys [EMAIL PROTECTED] wrote: I agree with John's explanation, which is why I vote for tdatasource.png. Trusted and known icon. should have a similar one i think ... Razvan Wanderlan
Re: [lazarus] MySQL Queries using Lazarus
Op dinsdag 11-12-2007 om 15:54 uur [tijdzone -0800], schreef el
stamatakos:
Hi All,
I have an application that connects to a MySQl database. I have found the
only way to get Lazrus to work without giving me an error Cannot access
Active DataSet is to do a Clear,Add, Open Close, like below
MainForm.SQLQuery1.SQL.Clear;
MainForm.SQLQuery1.SQL.Add('SELECT revID from rev WHERE
revName='+#39+CBProcessRev.Text+#39);
If you want to save some code, you could replace the lines above with:
Mainform.SQLQuery1.SQL.Text := 'SELECT revID fro..';
Joost
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Re: [lazarus] Making GTK Thread Safe
Razvan Adrian Bogdan wrote: On Dec 12, 2007 12:13 PM, Marc Weustink [EMAIL PROTECTED] wrote: The LCL won't be threadsafe, the overhead isn't worth the gain. Do you think it's an overhead to use the internal locking mechanism from GTK ? Not only overhead in gtk widgetset, also in LCL, and aslo in all other widgetsets. I tend to think it's a very light mechanism that you don't even feel in singlethreaded applications, having a threadsafe LCL means one can freely code without any headaches from synchronization making the code look nicer and dramatically cutting developing time, If you start to think your design first it won't cut much. but i do think it's a lot of code. I tend to think the LCLs overhead comes from using classes too much in the lower level API abstraction part. In all my years of delphi threadded app development I never needed threadded updates of my gui. Marc _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] vote for bdd related component icon
wile64 wrote: If I count *3 votes for tdatasource.png **4 votes for tdatasource1.png **6 votes for tdatasource2.png* I propose a test with discs -- Laurent. My Components: http://wiki.lazarus.freepascal.org/Wile64 French Forum : http://lazforum-fr.tuxfamily.org/index.php I don't mind which you use as a dataset base, but the database / dataset / datasource relationship really needs to be maintained. If you use the disks as a database, perhaps you could have a section of the disks coloured ( for example ) red to indicate a dataset, ie a selection of the database. (No arrows). You could add the text to show specific dataset types, as is done currently. You then have the same thing with the arrows (but not the text) to show a datasource. Does that make sense ? I can try to draw it if you like, but I am no graphic designer. To use one of the suggested icons as a dataset and another as a datasource would not keep the relationship at all - they would look like alternative ways of performing the same function cheers, John Sunderland. _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] MySQL Queries using Lazarus
ik wrote: One small note, you have an SQL injection at your code. I recommend you to use parameters as how to add the values, but prior to that, you should check to see if there are invalid chars, and trim them. That way, you can avoid a lot of problems. Ido Perhaps you should explain what is so terrible about a SQL injection ? I have heard of this before, but not the reason. I do this regularly and it seems to work fine! I am hesitant to recommend parameters in this situation currently. It depends on whether you form everything at run time, in which they are probably OK, or try to set it up in Lazarus at design time. I have had problems with parameters set up at design time. (I am still trying to work out exactly what the issue is, or I would have posted something about it, but basically they seem to loose their type specifications. Of course, I might simply be doing something wrong !). If Lefti is just writing his first few queries, what he is doing is probably a good way to get the hang of it. cheers, John Sunderland _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] MySQL Queries using Lazarus
Op woensdag 12-12-2007 om 22:51 uur [tijdzone +1100], schreef John:
ik wrote:
One small note, you have an SQL injection at your code. I recommend
you to use parameters as how to add the values, but prior to that, you
should check to see if there are invalid chars, and trim them. That
way, you can avoid a lot of problems.
Ido
Perhaps you should explain what is so terrible about a SQL injection
? I have heard of this before, but not the reason. I do this regularly
and it seems to work fine!
Suppose the query is like this: (from some mails earlier)
MainForm.SQLQuery1.SQL.Add('SELECT revID from rev WHERE
revName='+#39+CBProcessRev.Text+#39);
Oh, yes it works. Until...
A user types '; drop table rev; in CBProcessRev.
Well, that will still work. But only once. ;)
Joost
(btw: this won't work with all TSQLConnections, because some don't
accept a semicolon)
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Re: [lazarus] Making GTK Thread Safe
Marc Weustink ha scritto: Razvan Adrian Bogdan wrote: On Dec 12, 2007 12:13 PM, Marc Weustink [EMAIL PROTECTED] wrote: The LCL won't be threadsafe, the overhead isn't worth the gain. Do you think it's an overhead to use the internal locking mechanism from GTK ? Not only overhead in gtk widgetset, also in LCL, and aslo in all other widgetsets. I tend to think it's a very light mechanism that you don't even feel in singlethreaded applications, having a threadsafe LCL means one can freely code without any headaches from synchronization making the code look nicer and dramatically cutting developing time, If you start to think your design first it won't cut much. You may think as long as you want, but if the main loop is Idle, the synchronize method will just suspend your thread for a time which can be unacceptable. Therefore you must create a number of kludges to overcome the problem. This takes time, and makes the code unclean and harder to maintain. but i do think it's a lot of code. I tend to think the LCLs overhead comes from using classes too much in the lower level API abstraction part. In all my years of delphi threadded app development I never needed threadded updates of my gui. This doesn't make you really qualified to discuss the topic doesn't it? ;-) If your thread performs a side task which takes data from your main thread, and then processes them in parallel, then of course you don't need to deal with GUI, other than for error messages, which can be handled quite easily. But if your threads do receive data which must be fed to the main thread, and which must trigger visual events, then you become aware of the strong limitations of current implementation. Giuliano -- Giuliano Colla Whenever people agree with me, I always feel I must be wrong (O. Wilde) _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
[lazarus] SqlDB component madness
Hi, Please bare with me Lets get one thing out of the way. I never use DB Connection components on Forms and never use DB-aware components. I'm a OPF guy, so using the database components on a day-to-day basis is not something I am familiar with. So that said, I thought I would play with the SqlDB components today because I want to complete the SqlDB persistence layer for tiOPF. The ingredients I used for today are: TIBConnection, TSQLTransaction, TSQLQuery, TDataSource and TDBGrid. I got everything to work and data to be displayed in the TDBGrid, but here is where the 'madness' part comes in. The _very strange_ way I had to connect the above components. Step 1: == TIBConnection - TSQLTransaction via 'Database' property. No problem here. Step 2: == TIBConnection - TSQLTransaction via 'Transaction' property. Why??? Why must you link components in both directions? Step 3: == TSQLTransaction - TSQLQuery via 'Transaction' property. No problems here. Step 4: == TIBConnection - TSQLQuery via 'Database' property. Why??? Can't it figure it out from the TSQLTransaction it's hooked up to already (step 3)? What happens if the Transaction component is hooked up to DB1 and then I specify DB2 in the Database property? Step 5a: == TSQLQuery - TDatasource via the 'Dataset' property. No problems here. Step 5b: (optional) == TSQLQuery - TDatasource via the 'DataSource' property. It can be done, but wasn't needed to get my example project to work. Not sure what's the rules about this one. Step 6: == TDBGrid - TDatasource via the 'DataSource' property. No problems here. So if you haven't figured it out, my issues are with steps 2, 4 5b. I really can't see why they are needed in the first place. Linking components in both directions are simply redundant. Has nobody thought this as strange? It's like dropping a PopupMenu on a Form and then setting the following (which isn't needed by the way). Form.PopupMenu := PopupMenu. PopupMenu.Control := Form I worked with Delphi 7 using BDE and DOA (Direct Oracle Access) and never had to set links between database components in both directions. Below is the code generated in the .lfm file if the above wasn't clear. ---[ Copy ] object IBConnection1: TIBConnection Connected = True Streamedconnected = True DatabaseName = 'm2' Password = 'masterkey' Transaction = SQLTransaction1 UserName = 'sysdba' HostName = '192.168.0.1' Dialect = 3 left = 40 top = 8 end object SQLTransaction1: TSQLTransaction Active = True Database = IBConnection1 left = 78 top = 8 end object SQLQuery1: TSQLQuery Active = True Database = IBConnection1 Transaction = SQLTransaction1 SQL.Strings = ( 'select * from Users' ) Params = UpdateMode = upWhereKeyOnly UsePrimaryKeyAsKey = True ParseSQL = True left = 118 top = 8 end object Datasource1: TDatasource DataSet = SQLQuery1 left = 78 top = 48 end ---[ End ] Regards, - Graeme - ___ fpGUI - a cross-platform Free Pascal GUI toolkit http://opensoft.homeip.net/fpgui/ _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
[lazarus] Upgrading Lazarus
Hello: I have downloaded the las version Lazarus-0.9.24-fpc-2.2.0-20071114-win32.exe, and I have tried to installed over the old version 0.9.22, and I get errors, as always when I try to upgrade the version. Usually I give up, I delete the directory and reinstall from scratch, but this time I would like to learn what I am doing wrong. I have launched lazarus.exe, not startlazarus.exe, I have build lazarus from the menu checking clean and build all, and I get the following error: C:\lazarus\lcl\interfaces\win32\Win32Def.pp(1,1) Fatal: Can't find unit CommCtrl I get the same error in a w2000 SP4 nad XP sp2. Santiago [EMAIL PROTECTED] _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] SqlDB component madness
On 12/12/2007, Swen Heinig [EMAIL PROTECTED] wrote: if you do step1 then step2 is automatically done (no additional work for you). There is the same situation for step4 and step3 (if you connect to the database the transaction is automatically set). To make sure I'm not going nuts I tried it again. I redid Step 1 in a new form. I selected the IBConnection1 in the Database property of TSQLTransaction. Then clicked on IBConnection1 and the link from the TIBConnection to TSQLTransaction (Transaction property) is not setup automatically. Here is the code generated in the .lfm file. object IBConnection1: TIBConnection left = 73 top = 17 end object SQLTransaction1: TSQLTransaction Database = IBConnection1 left = 125 top = 20 end I have to follow all steps mentioned in my first email otherwise I keep getting error messages when I try and set the database components active. I got a Lazarus svn update this morning. I'm using r13293. Regards, - Graeme - ___ fpGUI - a cross-platform Free Pascal GUI toolkit http://opensoft.homeip.net/fpgui/ _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] SqlDB component madness
Hello Graeme, if you do step1 then step2 is automatically done (no additional work for you). There is the same situation for step4 and step3 (if you connect to the database the transaction is automatically set). Step5b: You can connect the SQLQuery to a second Datasource. If you connect the components in the right order you will not get surprises. Regards, Swen Graeme Geldenhuys schrieb: Hi, Please bare with me Lets get one thing out of the way. I never use DB Connection components on Forms and never use DB-aware components. I'm a OPF guy, so using the database components on a day-to-day basis is not something I am familiar with. So that said, I thought I would play with the SqlDB components today because I want to complete the SqlDB persistence layer for tiOPF. The ingredients I used for today are: TIBConnection, TSQLTransaction, TSQLQuery, TDataSource and TDBGrid. I got everything to work and data to be displayed in the TDBGrid, but here is where the 'madness' part comes in. The _very strange_ way I had to connect the above components. Step 1: == TIBConnection - TSQLTransaction via 'Database' property. No problem here. Step 2: == TIBConnection - TSQLTransaction via 'Transaction' property. Why??? Why must you link components in both directions? Step 3: == TSQLTransaction - TSQLQuery via 'Transaction' property. No problems here. Step 4: == TIBConnection - TSQLQuery via 'Database' property. Why??? Can't it figure it out from the TSQLTransaction it's hooked up to already (step 3)? What happens if the Transaction component is hooked up to DB1 and then I specify DB2 in the Database property? Step 5a: == TSQLQuery - TDatasource via the 'Dataset' property. No problems here. Step 5b: (optional) == TSQLQuery - TDatasource via the 'DataSource' property. It can be done, but wasn't needed to get my example project to work. Not sure what's the rules about this one. Step 6: == TDBGrid - TDatasource via the 'DataSource' property. No problems here. So if you haven't figured it out, my issues are with steps 2, 4 5b. I really can't see why they are needed in the first place. Linking components in both directions are simply redundant. Has nobody thought this as strange? It's like dropping a PopupMenu on a Form and then setting the following (which isn't needed by the way). Form.PopupMenu := PopupMenu. PopupMenu.Control := Form I worked with Delphi 7 using BDE and DOA (Direct Oracle Access) and never had to set links between database components in both directions. Below is the code generated in the .lfm file if the above wasn't clear. ---[ Copy ] object IBConnection1: TIBConnection Connected = True Streamedconnected = True DatabaseName = 'm2' Password = 'masterkey' Transaction = SQLTransaction1 UserName = 'sysdba' HostName = '192.168.0.1' Dialect = 3 left = 40 top = 8 end object SQLTransaction1: TSQLTransaction Active = True Database = IBConnection1 left = 78 top = 8 end object SQLQuery1: TSQLQuery Active = True Database = IBConnection1 Transaction = SQLTransaction1 SQL.Strings = ( 'select * from Users' ) Params = UpdateMode = upWhereKeyOnly UsePrimaryKeyAsKey = True ParseSQL = True left = 118 top = 8 end object Datasource1: TDatasource DataSet = SQLQuery1 left = 78 top = 48 end ---[ End ] Regards, - Graeme - ___ fpGUI - a cross-platform Free Pascal GUI toolkit http://opensoft.homeip.net/fpgui/ _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: Lazarus not cross compiling
Sam Liddicott schreef: Please could a wise chap help me see why lazarus is calling ppc386 even when I select to compile for powerpc. The search paths are powerpc but the wrong compiler is called. What does Environment - Environment Options - Files - Compiler Path say? The compiler name should be ppcppc or (as I prefer) fpc. Vincent _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] SqlDB component madness
Sorry, there was a misunderstanding from my side. If you do step2 then step1 is automatically done (thats the correct way). Swen Graeme Geldenhuys schrieb: On 12/12/2007, Swen Heinig [EMAIL PROTECTED] wrote: if you do step1 then step2 is automatically done (no additional work for you). There is the same situation for step4 and step3 (if you connect to the database the transaction is automatically set). To make sure I'm not going nuts I tried it again. I redid Step 1 in a new form. I selected the IBConnection1 in the Database property of TSQLTransaction. Then clicked on IBConnection1 and the link from the TIBConnection to TSQLTransaction (Transaction property) is not setup automatically. Here is the code generated in the .lfm file. object IBConnection1: TIBConnection left = 73 top = 17 end object SQLTransaction1: TSQLTransaction Database = IBConnection1 left = 125 top = 20 end I have to follow all steps mentioned in my first email otherwise I keep getting error messages when I try and set the database components active. I got a Lazarus svn update this morning. I'm using r13293. Regards, - Graeme - ___ fpGUI - a cross-platform Free Pascal GUI toolkit http://opensoft.homeip.net/fpgui/ _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] SqlDB component madness
Op woensdag 12-12-2007 om 15:11 uur [tijdzone +0200], schreef Graeme Geldenhuys: Step 1: == TIBConnection - TSQLTransaction via 'Database' property. No problem here. Step 2: == TIBConnection - TSQLTransaction via 'Transaction' property. Why??? Why must you link components in both directions? You don't need to do this. It is used when the TIBConnection tries to execute some sql-statements itself. If has to know which transaction it should use. You have to see this as the 'default transaction'. If you do TIBConnection.ExecuteDirect, this transaction is used. This transaction is also used when you use ApplyUpdates. Step 3: == TSQLTransaction - TSQLQuery via 'Transaction' property. No problems here. Step 4: == TIBConnection - TSQLQuery via 'Database' property. Why??? Can't it figure it out from the TSQLTransaction it's hooked up to already (step 3)? What happens if the Transaction component is hooked up to DB1 and then I specify DB2 in the Database property? Hm.. I never thought about that, really. It could be usefull, though. For example Oracle supports transactions which are working on several groups of databases Not that this is supported by sqldb... Michael, would it be an idea to remove this link? Step 5a: == TSQLQuery - TDatasource via the 'Dataset' property. No problems here. Step 5b: (optional) == TSQLQuery - TDatasource via the 'DataSource' property. It can be done, but wasn't needed to get my example project to work. Not sure what's the rules about this one. I've been mistaken about this one more then once. Also my collegues had problems with this. iirc it's renamed to something else in recent versions. What it does is handling the master-detail relationships. Joost _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] Proposed About dialog patch
On 10/12/2007, Mattias Gaertner [EMAIL PROTECTED] wrote: Yes I agree on that (and I agreed the first time too). It is only *how* it is done. Thats why I proposed to add a popup. I removed the easter egg. Okay Marc, I hope I got it right this time round. ;-) I created a PopupMenu in the About dialog. No hidden easter eggs. Simply right click anywhere on the Form. Patch is in Mantis: http://www.freepascal.org/mantis/view.php?id=10405 Regards, - Graeme - ___ fpGUI - a cross-platform Free Pascal GUI toolkit http://opensoft.homeip.net/fpgui/ _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
[lazarus] DBMemo read only, ever! It not receve data input!
Lazarus 0.9.25 svn 13278M DB: Firebird Components: UIB + FBDataset and TMenDataset DBMemo do not accept any entry. Is it wrong read only (Property read only is false)? _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] SqlDB component madness
On 12/12/2007, Joost van der Sluis [EMAIL PROTECTED] wrote: Step 2: You don't need to do this. It is used when the TIBConnection tries to execute some sql-statements itself. If has to know which transaction it should use. You have to see this as the 'default transaction'. If you do TIBConnection.ExecuteDirect, this transaction is used. This transaction is also used when you use ApplyUpdates. snip Step 5b: (optional) == TSQLQuery - TDatasource via the 'DataSource' property. It can be done, but wasn't needed to get my example project to work. Not sure what's the rules about this one. I've been mistaken about this one more then once. Also my collegues had problems with this. iirc it's renamed to something else in recent versions. What it does is handling the master-detail relationships. I have to beg to differ on both counts! They are both required, see below. I could send you my project if it might help. As for Step 5. Well in my simple example I have a query: Select * from users. No master-detail relationship there! Yet if I try to set the TSQLQuery.Active = True I get a Database not assigned! error. Assign the Database property to IBConnection1 and try Active = True again. This time I get the following error: Transaction of connection not set. Now I go to the IBConnection1 and set the Transaction (doubly link madness) and no I'm not trying to execute anything directly via the IBConnection. Go back to SQLQuery and set Active = True. Now everything works and I get results in the DBGrid. So bottom line - all the steps from my first email *are* required to get results in a DBGrid. Regards, - Graeme - ___ fpGUI - a cross-platform Free Pascal GUI toolkit http://opensoft.homeip.net/fpgui/ _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: Lazarus not cross compiling
* Vincent Snijders wrote, On 12/12/07 13:53: Sam Liddicott schreef: Please could a wise chap help me see why lazarus is calling ppc386 even when I select to compile for powerpc. The search paths are powerpc but the wrong compiler is called. What does Environment - Environment Options - Files - Compiler Path say? The compiler name should be ppcppc or (as I prefer) fpc. Thats what I was looking for. Thanks Sa, _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: Lazarus not cross compiling
* Vincent Snijders wrote, On 12/12/07 13:53: Sam Liddicott schreef: Please could a wise chap help me see why lazarus is calling ppc386 even when I select to compile for powerpc. The search paths are powerpc but the wrong compiler is called. What does Environment - Environment Options - Files - Compiler Path say? The compiler name should be ppcppc or (as I prefer) fpc. That's what I was looking for. Thanks Sam _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] SqlDB component madness
On Wed, 12 Dec 2007, Joost van der Sluis wrote: Op woensdag 12-12-2007 om 15:11 uur [tijdzone +0200], schreef Graeme Geldenhuys: Step 1: == TIBConnection - TSQLTransaction via 'Database' property. No problem here. Step 2: == TIBConnection - TSQLTransaction via 'Transaction' property. Why??? Why must you link components in both directions? You don't need to do this. It is used when the TIBConnection tries to execute some sql-statements itself. If has to know which transaction it should use. You have to see this as the 'default transaction'. If you do TIBConnection.ExecuteDirect, this transaction is used. This transaction is also used when you use ApplyUpdates. 1. It should be set to the first transaction that is hooked up to it. That's what IBX does, and it makes sense. So you don't need to set it. 2. ApplyUpdates should use the transaction of TSQLQuery ? Step 3: == TSQLTransaction - TSQLQuery via 'Transaction' property. No problems here. Step 4: == TIBConnection - TSQLQuery via 'Database' property. Why??? Can't it figure it out from the TSQLTransaction it's hooked up to already (step 3)? What happens if the Transaction component is hooked up to DB1 and then I specify DB2 in the Database property? Hm.. I never thought about that, really. It could be usefull, though. For example Oracle supports transactions which are working on several groups of databases Not that this is supported by sqldb... Michael, would it be an idea to remove this link? No, because Firebird and Oracle support cross-database transactions, and you must point out the correct database. But, setting TSQLQuery.Transaction should set Database if it is not yet set, and vice versa, setting TSQLQuery.Database should set TRansaction to Database.Defaulttransaction. This is on my TODO list before 2.2.2, because I consider this a bug. Step 5a: == TSQLQuery - TDatasource via the 'Dataset' property. No problems here. Step 5b: (optional) == TSQLQuery - TDatasource via the 'DataSource' property. It can be done, but wasn't needed to get my example project to work. Not sure what's the rules about this one. I've been mistaken about this one more then once. Also my collegues had problems with this. iirc it's renamed to something else in recent versions. What it does is handling the master-detail relationships. It is not renamed, and it should not be. In Delphi it is also called DataSource. As Joost says, it is needed to handle Master-Detail relations: Query1: Select ID, * from Invoice DS1.Dataset=Query1; Query2: Select * from InvoiceDetails Where InvoiceID=:ID; Query2.DataSource:=DS1; As the user scrolls through Query1, Query2 is updated automatically with the new ID value. Michael. _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
[lazarus] What do you use for Reporting?
LazReport looks to have been a fairly recent addition. I was wondering what most people did for reporting from Lazarus. I was thinking of: 1. Stick to text based reports - write a decent abstraction layer for formatting, etc. 2. Use PowerPDF to write all reports to standard pdf format. A lot of hand coding both ways, but seems flexible enough. Any input or suggestions? -- Warm Regards, Lee If I don't see you around here, I'll see you around, hear? _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
RE: [lazarus] What do you use for Reporting?
What I do: Output all reports to RTF and view with external viewer (any word processor on computer). See this tool for more information: http://wiki.lazarus.freepascal.org/XDev_Toolkit With RTF you can have almost unlimited control over the formatting. Note that on OS X with the latest Carbon widgetset, anything output via the Printer object can be printed, previewed or saved to PDF via the OS X Printer dialog. Too bad this isn't available on other systems. Thanks. -Phil -Original Message- From: Lee Jenkins [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 12, 2007 10:17 AM To: Lazarus Mailing List Subject: [lazarus] What do you use for Reporting? LazReport looks to have been a fairly recent addition. I was wondering what most people did for reporting from Lazarus. I was thinking of: 1. Stick to text based reports - write a decent abstraction layer for formatting, etc. 2. Use PowerPDF to write all reports to standard pdf format. A lot of hand coding both ways, but seems flexible enough. Any input or suggestions? -- Warm Regards, Lee If I don't see you around here, I'll see you around, hear? _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] SqlDB component madness
On Wed, 12 Dec 2007, Graeme Geldenhuys wrote: On 12/12/2007, Joost van der Sluis [EMAIL PROTECTED] wrote: Step 2: You don't need to do this. It is used when the TIBConnection tries to execute some sql-statements itself. If has to know which transaction it should use. You have to see this as the 'default transaction'. If you do TIBConnection.ExecuteDirect, this transaction is used. This transaction is also used when you use ApplyUpdates. snip Step 5b: (optional) == TSQLQuery - TDatasource via the 'DataSource' property. It can be done, but wasn't needed to get my example project to work. Not sure what's the rules about this one. I've been mistaken about this one more then once. Also my collegues had problems with this. iirc it's renamed to something else in recent versions. What it does is handling the master-detail relationships. I have to beg to differ on both counts! They are both required, see below. I could send you my project if it might help. As for Step 5. Well in my simple example I have a query: Select * from users. No master-detail relationship there! Yet if I try to set the TSQLQuery.Active = True I get a Database not assigned! error. Assign the Database property to IBConnection1 and try Active = True again. This time I get the following error: Transaction of connection not set. Now I go to the IBConnection1 and set the Transaction (doubly link madness) and no I'm not trying to execute anything directly via the IBConnection. Go back to SQLQuery and set Active = True. Now everything works and I get results in the DBGrid. So bottom line - all the steps from my first email *are* required to get results in a DBGrid. In that case you represented step 5 wrongly: There you need DataSource.Dataset - TSQLQuery. In short, assume the following components: DB : TSQLConnection descendent. TR : TSQLTransaction; Q : TSQLQuery; DS : TDataSource; G : TDBGrid; Then these are the steps: 1. TR.Database - DB 2. DB.DefaultTransaction - TR // Should be automatic in future. 3. Q.Transaction - TR 4. Q.Database-DB // Should be automatic in future. 5. DS.Dataset-Q; 6. G.DataSource-DS; If all works as I want it, this should be reduced to 4 steps for the default cases, and steps 1 and 2 can be reversed if so desired, and steps 3 and 4 also. Michael. _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: Lazarus not cross compiling
Sam Liddicott schreef: * Vincent Snijders wrote, On 12/12/07 13:53: Sam Liddicott schreef: Please could a wise chap help me see why lazarus is calling ppc386 even when I select to compile for powerpc. The search paths are powerpc but the wrong compiler is called. What does Environment - Environment Options - Files - Compiler Path say? The compiler name should be ppcppc or (as I prefer) fpc. That's what I was looking for. Thanks FYI, this information is also in the last paragraph of http://wiki.lazarus.freepascal.org/index.php?title=Unit_not_found_-_How_to_find_unitscurid=2724diff=25651oldid=25512#Case_3.3:_The_wrong_compiler_is_being_used Vincent _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] vote for bdd related component icon
No comment ;-) -- Laurent. My Components: http://wiki.lazarus.freepascal.org/Wile64 French Forum : http://lazforum-fr.tuxfamily.org/index.php attachment: tdatasource.pngattachment: tdbcalendar.pngattachment: tdbcheckbox.pngattachment: tdbcombobox.pngattachment: tdbedit.pngattachment: tdbgroupbox.pngattachment: tdblistbox.pngattachment: tdbmemo.png
Re: [lazarus] MySQL Queries using Lazarus
On Dec 12, 2007 2:39 PM, John [EMAIL PROTECTED] wrote:
Joost van der Sluis wrote:
Op woensdag 12-12-2007 om 22:51 uur [tijdzone +1100], schreef John:
ik wrote:
One small note, you have an SQL injection at your code. I recommend
you to use parameters as how to add the values, but prior to that, you
should check to see if there are invalid chars, and trim them. That
way, you can avoid a lot of problems.
Ido
Perhaps you should explain what is so terrible about a SQL injection
? I have heard of this before, but not the reason. I do this regularly
and it seems to work fine!
Suppose the query is like this: (from some mails earlier)
MainForm.SQLQuery1.SQL.Add('SELECT revID from rev WHERE
revName='+#39+CBProcessRev.Text+#39);
Oh, yes it works. Until...
A user types '; drop table rev; in CBProcessRev.
Well, that will still work. But only once. ;)
Joost
(btw: this won't work with all TSQLConnections, because some don't
accept a semicolon)
So the issue is accepting the text straight from the user input, not the
fact that the query text is constructed rather than using a parameter
? When I say I do it all the time, it is far more likely to be
something like 'select * from sometable where ref = ' +
IntToStr(AnIntegerValue), or some otherwise well-validated expression.
Make sure first of all to have only the valid chars, then escape all
potentially exploitable chars (such as ' /* -- ; and so on).
The thing with Injection (regardless of SQL) is that I can use any
type of content I wish to make in order to make sure that I can
effect/gain things that I can't any other way.
I usually create a filter function such as follows:
function filterChars (const Value : string; chars : TCharset) : string;
var
i : integer;
begin
Result := '';
for i := 1 to length (Value) do
if (Value[i] in chars ) then
Result := Result + Value[i];
end;
I just rewrite it from my head... It will remove any chars that are
not part of the chars parameter, making it clean from un needed
chars. then I'll escape any string chars by converting ' into \' or ''
(depands on the database). The thing with parameters (anonymous or
named) is that the database itself makes the escaping for you.
Don't get me wrong, I actually prefer to use parameters in such a
circumstance if I can get them to work, especially if the sql is
executed repeatedly with different criteria.
I recommand you to read my guide for secure programming:
http://wiki.freepascal.org/Secure_programming
Or in a newer version:
http://ik.homelinux.org/index.rhtml/guides/secure_programming
cheers,
John Sunderland
Ido
--
http://ik.homelinux.org/
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Re: [lazarus] Proposed About dialog patch
Graeme Geldenhuys wrote: On 10/12/2007, Mattias Gaertner [EMAIL PROTECTED] wrote: Yes I agree on that (and I agreed the first time too). It is only *how* it is done. Thats why I proposed to add a popup. I removed the easter egg. Okay Marc, I hope I got it right this time round. ;-) I created a PopupMenu in the About dialog. No hidden easter eggs. Simply right click anywhere on the Form. Patch is in Mantis: http://www.freepascal.org/mantis/view.php?id=10405 :) Marc _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] What do you use for Reporting?
* Lee Jenkins [EMAIL PROTECTED] [Wed, 12 Dec 2007 10:17:12 -0500]: LazReport looks to have been a fairly recent addition. I was wondering what most people did for reporting from Lazarus. I was thinking of: 1. Stick to text based reports - write a decent abstraction layer for formatting, etc. 2. Use PowerPDF to write all reports to standard pdf format. A lot of hand coding both ways, but seems flexible enough. I'm currently port big office application, with many FreeReport's forms, from Delphi to Lazarus. I do start to develop LazReport-OpenOffice exporter, but meanwhile it is nothing to publish. _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: Lazarus not cross compiling
* Vincent Snijders wrote, On 12/12/07 15:37: Sam Liddicott schreef: * Vincent Snijders wrote, On 12/12/07 13:53: Sam Liddicott schreef: Please could a wise chap help me see why lazarus is calling ppc386 even when I select to compile for powerpc. The search paths are powerpc but the wrong compiler is called. What does Environment - Environment Options - Files - Compiler Path say? The compiler name should be ppcppc or (as I prefer) fpc. That's what I was looking for. Thanks FYI, this information is also in the last paragraph of http://wiki.lazarus.freepascal.org/index.php?title=Unit_not_found_-_How_to_find_unitscurid=2724diff=25651oldid=25512#Case_3.3:_The_wrong_compiler_is_being_used Thanks for adding that. I wrote that wiki section this morning and was going to add your answer tonight when I got home. I reckon lazarus ought to use fpc by default? And now I have been able to discover the final spell I need for the cross compiler postinst, which will be some ifdef in fpc.cfg to add the bintools prefix depending on the selected cpu/os; so if all goes well we'll have simplified automated building of cross compiler debs. I'll then re-work THAT so that the debian/* files are built as part of make-dist (and the same for the spec file) to really simplify package building. RPM guys will just need to do: rpm -tb fpc-tar.gz or something. Sam _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] Making GTK Thread Safe
On 12/12/2007, Giuliano Colla [EMAIL PROTECTED] wrote: If your thread performs a side task which takes data from your main thread, and then processes them in parallel, then of course you don't need to deal with GUI, other than for error messages, which can be handled quite easily. But if your threads do receive data which must be fed to the main thread, and which must trigger visual events, then you become aware of the strong limitations of current implementation. I'm no Threads expert, but have been studying code that uses threads heavily. A few such examples are the Borland Multi-Threading competition [1] that was held a few years back. There all the entries were GUI apps and the threads managed to update the GUI just fine (via Synchronized methods I believe). So is it really a issue, or am I not understanding the underlying problem? [1] - I can supply the URL if anybody is interested. Regards, - Graeme - ___ fpGUI - a cross-platform Free Pascal GUI toolkit http://opensoft.homeip.net/fpgui/ _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] SqlDB component madness
On 12/12/2007, Joost van der Sluis [EMAIL PROTECTED] wrote: Both counts? 5b Is optional? You said that yourself. Sorry, I got Step 4 and 5 mixed up. That's because you don't have any indexes pre-defined. So it tries to fetch the indexes from the database. At that point the TIBConnection needs a transaction... Set TSQLQuery.ParseSQL:=false; Then you don't So in addition to my Select statement, it executes another auto generated query trying to look for a Index. That's interesting. need step 2 anymore. For your OPF you have to set it to false anyways, since it's useless in your case. Thanks for the tip. Regards, - Graeme - ___ fpGUI - a cross-platform Free Pascal GUI toolkit http://opensoft.homeip.net/fpgui/ _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] SqlDB component madness
On 12/12/2007, Michael Van Canneyt [EMAIL PROTECTED] wrote: If all works as I want it, this should be reduced to 4 steps for the default cases, That is what I expected and what I was used to in Delphi. I gather the change you are talking about would work from code as well, and not just some Lazarus Object Inspector magic? PS: Would anybody mind if I put this new found knowledge in a fpdoc sqldb file? It would be nice having some help as a start, compared to nothing as it stands at the moment. It can always be improved on or completed at a later date by other contributors. I remember just a few days ago there were other developers also complaining about not having any help reference for the sqldb units. My contributions would at least be a start. Regards, - Graeme - ___ fpGUI - a cross-platform Free Pascal GUI toolkit http://opensoft.homeip.net/fpgui/ _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] SqlDB component madness
On Wed, 12 Dec 2007, Graeme Geldenhuys wrote: On 12/12/2007, Michael Van Canneyt [EMAIL PROTECTED] wrote: If all works as I want it, this should be reduced to 4 steps for the default cases, That is what I expected and what I was used to in Delphi. I gather the change you are talking about would work from code as well, and not just some Lazarus Object Inspector magic? Yes, of course it would work in code as well. I'll see about doing this tonight. PS: Would anybody mind if I put this new found knowledge in a fpdoc sqldb file? It would be nice having some help as a start, compared to nothing as it stands at the moment. It can always be improved on or completed at a later date by other contributors. I remember just a few days ago there were other developers also complaining about not having any help reference for the sqldb units. My contributions would at least be a start. Please do. Michael. _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
[lazarus] r 13300
In this last revision Lazarus doesn't clean the objectinspector window and the messages window anymore. See attachment -- Ger attachment: ObjectInspector.jpg
Re: [lazarus] r 13300
Ger Remmers schreef: In this last revision Lazarus doesn't clean the objectinspector window and the messages window anymore. See also: http://www.freepascal.org/mantis/view.php?id=10406 Vincent _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] What do you use for Reporting?
On Wed, 12 Dec 2007 10:29:33 -0500 Hess, Philip J [EMAIL PROTECTED] wrote: What I do: Output all reports to RTF and view with external viewer (any word processor on computer). See this tool for more information: http://wiki.lazarus.freepascal.org/XDev_Toolkit With RTF you can have almost unlimited control over the formatting. Note that on OS X with the latest Carbon widgetset, anything output via the Printer object can be printed, previewed or saved to PDF via the OS X Printer dialog. Too bad this isn't available on other systems. There are free PDF printers for at least linux and windows. AFAIK the windows pdf printers have some problems on windows terminal servers, and the linux ones have static output filenames. Mattias _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] Making GTK Thread Safe
On 12/12/2007, Razvan Adrian Bogdan [EMAIL PROTECTED] wrote: The synchronize method is simple but inefficient, it pauses your thread until the main thread has time to execute your code and could take some time until it does, i personally also dislike the fact that Ah okay I see what you mean. If the thread doesn't need to communicate with the main GUI thread, it will run perfectly. As soon as it has to talk to the main GUI thread it has to use Synchronize, which might be delayed by a very busy GUI thread. So what if the worker thread posts a custom message to say the windows message queue. Surely that wouldn't cause the thread to be suspended. The GUI control then simply needs to know about the custom message, to process it correctly. Could this work, well on Windows at least? Regards, - Graeme - ___ fpGUI - a cross-platform Free Pascal GUI toolkit http://opensoft.homeip.net/fpgui/ _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] Making GTK Thread Safe
On Dec 12, 2007 9:34 PM, Graeme Geldenhuys [EMAIL PROTECTED] wrote: So what if the worker thread posts a custom message to say the windows message queue. Surely that wouldn't cause the thread to be suspended. The GUI control then simply needs to know about the custom message, to process it correctly. Could this work, well on Windows at least? Using messages works on windows, but GTK is the most thread unsafe of all widgetsets, when i tried to port an app that worked fine on windows to GTK1/2 it was quite unstable, even now with a StringList based messages queue there are times when the app simply crashes with strange gtk resize warning but this is probably a GTK stability issue. Being able to do GUI calls in secondary threads is nice to have. Razvan _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] Making GTK Thread Safe
The synchronize method is simple but inefficient, it pauses your thread until the main thread has time to execute your code and could take some time until it does, i personally also dislike the fact that one cannot call any procedure/function with any number of parameters with synchronize. I think mark proposed once the solution of using a List (StringList or something else) in a synchronised manner with CriticalSections protecting access to the list and this way creating a message system similar to the OS one but this implementation is also not always comfortable but it isn't blocking as synchronize, the problem is not with the windows widgetset which is message based and quite thread safe and one can easily use CriticalSections with Controls, Borland started to make the VCL threadsafe but they didn't complete this task, maybe LCL would be more popular if it was threadsafe, i do realise it's a lot of work but it might be worth it. Razvan _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] SqlDB component madness
On Wed, 12 Dec 2007, Michael Van Canneyt wrote: On Wed, 12 Dec 2007, Graeme Geldenhuys wrote: On 12/12/2007, Michael Van Canneyt [EMAIL PROTECTED] wrote: If all works as I want it, this should be reduced to 4 steps for the default cases, That is what I expected and what I was used to in Delphi. I gather the change you are talking about would work from code as well, and not just some Lazarus Object Inspector magic? Yes, of course it would work in code as well. I'll see about doing this tonight. Done and committed. Sent test program to Joost. Michael. _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] r 13300
Ger Remmers schreef: On Wednesday 12 December 2007, Vincent Snijders wrote: See also: http://www.freepascal.org/mantis/view.php?id=10406 Vincent There it's reported for gtk2, I recompiled Lazarus for gtk and the same thing happens One of the notes says it is for gtk1 too. Vincent _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] Communication between main thread and worker thread
On Dec 7, 2007 9:57 PM, Antonio Sanguigni [EMAIL PROTECTED] wrote: Hi all, usually under windows my worker thread send a message to main thread with postmessage function to communicate simple data, such as integer to update progress percentage of worker thread status. With Lazarus and with cross-platform windows/Linux development, how is the way to go ? You could use a List or SringList and a CriticalSection to queue messages and extract them in the main form, it should work on all platforms. Razvan _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] Identifier not found pango_layout_get_font_description
On Dec 12, 2007, at 9:07 PM, Osvaldo TC Filho wrote:
/home/opt/pascal/lazarus/lcl/interfaces/gtk2/gtk2widgetset.inc(624,48)
Error: Identifier not found pango_layout_get_font_description
==
{$if defined(VER2_0) or defined(VER2_2_0)} need VER2_2_1
==
function
pango_layout_get_font_description
(layout:PPangoLayout):PPangoFontDescription; cdecl; external pangolib;
{$ifend}
in gtkextra.pp line 116
Linux GTK2 subversion
I already had this error before and was resolved with a clean
installation/recompilation.
It seems there were remaining files which were no longer required.
--
Damien Gerard
[EMAIL PROTECTED]
People who used magic without knowing what they were doing usually
came to a sticky end. All over the entire room, sometimes.
-- (Terry Pratchett, Moving Pictures)
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Re: [lazarus] Making GTK Thread Safe
Giuliano Colla wrote: However making Lazarus LCL thread safe can be a lot of work, but would be an enormous bonus which would enable to use it in all fields where a real efficient thread support is needed and currently you have no RAD tools. Multi-thread safe LCL would also mean locking, and that means slowdown also when you don't need it. 'real efficient' is therefore a *very* *Very* simplistic view of the situation. Besides, the GUI thread is meant to be mostly idle; so that it can respond to user's action quickly. You have to synchronize your background tasks anyway if you run them, and want to stop them; so multi-thread safety doesn't gain much on this point. My personal opinion it's only nice for QuickSort vs. Bubble Sort demoes. Micha _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] Making GTK Thread Safe
So what if the worker thread posts a custom message to say the windows message queue. Surely that wouldn't cause the thread to be suspended. The GUI control then simply needs to know about the custom message, to process it correctly. Could this work, well on Windows at least? Using messages works on windows, but GTK is the most thread unsafe of all widgetsets, when i tried to port an app that worked fine on windows to GTK1/2 it was quite unstable, even now with a StringList based messages queue there are times when the app simply crashes with strange gtk resize warning but this is probably a GTK stability issue. Being able to do GUI calls in secondary threads is nice to have. I must confess I don't know too much of GTK1/2 but, for example if fpGUI is a framework from scratch indipendent from GTK, simply sending asynchronous messages to the main thread should work well ? It can elaborate the messages when the main loop will intercept them. In Windows it should work well; with Linux or other operating system I have no idea but I suppose yes. -- Antonio Sanguigni alias slapshot -- GioveLUG (Linux User Group) - http://www.giovelug.org Edupup (Educational distro) - http://www.edupup.org
[lazarus] Splash Screen on Linux
Hi All,
I am trying to use a splash screen before my main application starts. I use
the following. Does anyone see anything wrong with the below since it does not
seem to bring up the Splash Screen. Thanks
Lefti
--unit
Splash--
unit Splash;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, LResources, Forms, Controls, Graphics, Dialogs, ExtCtrls,
StdCtrls;
type
{ TSplashForm }
TSplashForm = class(TForm)
Image1: TImage;
Label1: TLabel;
Label2: TLabel;
procedure FormCreate(Sender: TObject);
private
{ private declarations }
public
{ public declarations }
end;
var
SplashForm: TSplashForm;
implementation
{ TSplashForm }
procedure TSplashForm.FormCreate(Sender: TObject);
begin
sleep(2);
end;
initialization
{$I splash.lrs}
end.
--unit
Splash--
--Main
project-
program project1;
{$mode objfpc}{$H+}
uses
{$IFDEF UNIX}{$IFDEF UseCThreads}
cthreads,
{$ENDIF}{$ENDIF}
Interfaces, // this includes the LCL widgetset
Forms
{ you can add units after this }, SQLDBLaz, ProcessDesChild, Unit1,
SharedVarsU, SharedLibsU, Splash;
begin
SplashForm:=TSplashForm.Create(Application);
SplashForm.Show;
SplashForm.Paint;
SplashForm.Update;
application.ProcessMessages;
application.Initialize;
//Delay(2000);
Application.Initialize;
Application.CreateForm(TMainForm, MainForm);
SplashForm.Hide;
SplashForm.Close;
SplashForm.Release;
SplashForm.Free;
Application.Run;
end.
--Main
project-
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Re: [lazarus] Splash Screen on Linux
On Wed, 12 Dec 2007 15:17:18 -0800
el stamatakos [EMAIL PROTECTED] wrote:
Hi All,
I am trying to use a splash screen before my main application
starts. I use the following. Does anyone see anything wrong with the
below since it does not seem to bring up the Splash Screen. Thanks
A few things.
Lefti
--unit
Splash--
unit Splash;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, LResources, Forms, Controls, Graphics, Dialogs,
ExtCtrls, StdCtrls;
type
{ TSplashForm }
TSplashForm = class(TForm)
Image1: TImage;
Label1: TLabel;
Label2: TLabel;
procedure FormCreate(Sender: TObject);
private
{ private declarations }
public
{ public declarations }
end;
var
SplashForm: TSplashForm;
implementation
{ TSplashForm }
procedure TSplashForm.FormCreate(Sender: TObject);
begin
sleep(2);
remove this sleep.
end;
initialization
{$I splash.lrs}
end.
--unit
Splash--
--Main
project-
program project1;
{$mode objfpc}{$H+}
uses
{$IFDEF UNIX}{$IFDEF UseCThreads}
cthreads,
{$ENDIF}{$ENDIF}
Interfaces, // this includes the LCL widgetset
Forms
{ you can add units after this }, SQLDBLaz, ProcessDesChild, Unit1,
SharedVarsU, SharedLibsU, Splash;
begin
move the application.Initialize to here.
SplashForm:=TSplashForm.Create(Application);
replace the owner with nil
:=TSplashForm.Create(nil);
SplashForm.Show;
SplashForm.Paint;
SplashForm.Update;
remove the paint and the update.
application.ProcessMessages;
application.Initialize;
remove the application.Initialize
//Delay(2000);
Application.Initialize;
remove the application.Initialize
Application.CreateForm(TMainForm, MainForm);
SplashForm.Hide;
SplashForm.Close;
SplashForm.Release;
SplashForm.Free;
Just Free.
Application.Run;
end.
Mattias
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Re: [lazarus] cross compile deb status and next problem
On Wed, 12 Dec 2007 22:40:25 + Sam Liddicott [EMAIL PROTECTED] wrote: This message contains a progress report, and some more questions: Progress == Thanks to Vincent, using fpc as the compiler, and using this spell in /etc/fpc.cfg (which will be added to the default fpc package) echo '#include /usr/lib/fpc/2.3.1/fpc-cross.cfg' /etc/fpc.cfg Please replace the version number with $fpcversion. and then the file /usr/lib/fpc/2.3.1/fpc-cross.cfg can have 1 #include per cross compiler e.g. #include /usr/lib/fpc/2.3.1/fpc.powerpc-linux.cfg these will be easy to add and remove with postinst and postrm for package managers. A typical file might be: $ cat /usr/lib/fpc/2.3.1/fpc.powerpc-linux.cfg # Detect powerpc-linux compiles #IF $fpc-target = powerpc-linux -XPpowerpc-linux-gnu- #WRITE binutils prefix powerpc-linux-gnu- #END The actual -XP entry will depend on what the binutils prefix was when the cross compile package was actually built. THAT much works; so merely installing a cross-compiler deb will let lazarus just pick it up and run Nice. Just like the existing fpc_crosswin32 package, but finally for more platforms. :) Problems == However the next problems: rebuilding lazarus (lcl etc) is done by a makefile, e.g.: /usr/share/lazarus/lcl/ /usr/bin/make clean all -w CPU_TARGET=powerpc fpc is not called by the makefle, so /etc/fpc.cfg is not read, and of course this needs adding: BINUTILSPREFIX=powerpc-linux-gnu- or whatever the prefix actually needs to be; but thats too long winded; we already solved this problem by using fpc. So... I guess I need to find out why /usr/bin/ppcrossppc is being used directly and not fpc... And why lazarus insists on making clean and making in /usr/share/lazarus even though I'm not root and don't have write access, but that can come later... Probably because /usr/share/lazarus is set in the environment options as lazarus directory and you told the IDE to rebuild the LCL. The LCL can still only be built via the Makefile and this is not very flexible. Eventually when the LCL is changed to a normal lazarus package it will be possible to build the LCL, even if the LCL was installed as root. And then (finally, please let it be finally) where cprt21.o is or comes from for powerpc. Maybe I missed it in the cross-deb? Mattias _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
RE: [lazarus] Splash Screen on Linux
Hi ,
I still seem to have problems. It still dissapears to fast to see. If I debug
and put a stop and step through then it does show, but when I run it in normal
mode it is just too fast. Any recommendations. Thanks
Lefti
Date: Thu, 13 Dec 2007 00:31:03 +0100
From: [EMAIL PROTECTED]
To: lazarus@miraclec.com
Subject: Re: [lazarus] Splash Screen on Linux
On Wed, 12 Dec 2007 15:17:18 -0800
el stamatakos wrote:
Hi All,
I am trying to use a splash screen before my main application
starts. I use the following. Does anyone see anything wrong with the
below since it does not seem to bring up the Splash Screen. Thanks
A few things.
Lefti
--unit
Splash--
unit Splash;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, LResources, Forms, Controls, Graphics, Dialogs,
ExtCtrls, StdCtrls;
type
{ TSplashForm }
TSplashForm = class(TForm)
Image1: TImage;
Label1: TLabel;
Label2: TLabel;
procedure FormCreate(Sender: TObject);
private
{ private declarations }
public
{ public declarations }
end;
var
SplashForm: TSplashForm;
implementation
{ TSplashForm }
procedure TSplashForm.FormCreate(Sender: TObject);
begin
sleep(2);
remove this sleep.
end;
initialization
{$I splash.lrs}
end.
--unit
Splash--
--Main
project-
program project1;
{$mode objfpc}{$H+}
uses
{$IFDEF UNIX}{$IFDEF UseCThreads}
cthreads,
{$ENDIF}{$ENDIF}
Interfaces, // this includes the LCL widgetset
Forms
{ you can add units after this }, SQLDBLaz, ProcessDesChild, Unit1,
SharedVarsU, SharedLibsU, Splash;
begin
move the application.Initialize to here.
SplashForm:=TSplashForm.Create(Application);
replace the owner with nil
:=TSplashForm.Create(nil);
SplashForm.Show;
SplashForm.Paint;
SplashForm.Update;
remove the paint and the update.
application.ProcessMessages;
application.Initialize;
remove the application.Initialize
//Delay(2000);
Application.Initialize;
remove the application.Initialize
Application.CreateForm(TMainForm, MainForm);
SplashForm.Hide;
SplashForm.Close;
SplashForm.Release;
SplashForm.Free;
Just Free.
Application.Run;
end.
Mattias
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Re: [lazarus] Making GTK Thread Safe
Graeme Geldenhuys ha scritto: On 12/12/2007, Razvan Adrian Bogdan [EMAIL PROTECTED] wrote: The synchronize method is simple but inefficient, it pauses your thread until the main thread has time to execute your code and could take some time until it does, i personally also dislike the fact that Ah okay I see what you mean. If the thread doesn't need to communicate with the main GUI thread, it will run perfectly. As soon as it has to talk to the main GUI thread it has to use Synchronize, which might be delayed by a very busy GUI thread. Well, on Kylix it was much worse than that. It could be delayed ad libitum by an Idle GUI thread. Delphi relied on Windows buggy behavior of sending frequent useless messages around to wake up the main thread frequently. But an honest to God OS, which doesn't send messages when it has nothing to say, defeats a design based on bugs. Of course we may overcome that, by creating your own queue of events from the thread, and try to process them with an OnIdle event handler, and wake up periodically the main thread with a timer event. To discover that if your timer event doesn't change something visual, the smart thing decides that there's nothing important to do, and stays Idle, so that the OnIdle handler is never called. My kludge has been to have the Timer update a Label in a hidden corner of the screen, with a sequence of - \ | / - . This wakes up the main thread, which then goes Idle, triggers the OnIdle event, and the queue can be processed. You may see that this is far from satisfactory. Up to now I've not yet tested Lazarus with a real demanding threaded app, but from what I've read about the OnIdle events from Felipe and others, I'm afraid that the result won't be much different. So what if the worker thread posts a custom message to say the windows message queue. Surely that wouldn't cause the thread to be suspended. The GUI control then simply needs to know about the custom message, to process it correctly. Could this work, well on Windows at least? See above. One should use a different design. It's useless to attempt to make single graphic components thread safe. It enormously increases the overhead, and the number of possible bugs. What if a widget handled by thread A is partially covered by a widget handled by thread B, and both reside on a window handled by thread C? Just think to the amount of communication between different threads in order to sort out how to redraw in the proper order. The screen is a shared resource, so it must be granted exclusive access. If one thinks of one main thread which besides doing its job receives messages from all the worker threads, creates a clean queue of what needs to be done (sorting out what's visible and what not, what must be drawn and what not, etc.), and passes that to a graphic thread which is the only one which has access to the display, then you have a real multithread GUI, which could fill a void in what's currently available. It could be a challenging project, don't you think? It just requires a not too large GUI system already existing (such as fpGui, not Lazarus which is too big to play with) and some enthusiasm (and also a lot of time, but for my company it could be important, so some resources could be found). Regards, Giuliano _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] New bitmap :-)
wile64 пишет: More -- Laurent. Thanks, ipc images commited in r13306. About db images. They are good, but I will not commit until you tell me that they are last. Best regards, Paul Ishenin. _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] Making GTK Thread Safe
Micha Nelissen ha scritto: Giuliano Colla wrote: However making Lazarus LCL thread safe can be a lot of work, but would be an enormous bonus which would enable to use it in all fields where a real efficient thread support is needed and currently you have no RAD tools. Multi-thread safe LCL would also mean locking, and that means slowdown also when you don't need it. 'real efficient' is therefore a *very* *Very* simplistic view of the situation. Locking is the easy hacking way. Is basically the reverse of what it's done now with the blocking mechanism of synchronize. You don't block the main thread, but rather the working thread. Making LCL thread safe mean to separate the logical handling of what has to be done, from the physical handling of writing to the screen. If it's well implemented it can be faster than now even for applications which don't need multithreading. If you think, any web browser is multithreaded, thread safe, and fills up your screen faster than Lazarus. Besides, the GUI thread is meant to be mostly idle; so that it can respond to user's action quickly. You have to synchronize your background tasks anyway if you run them, and want to stop them; so multi-thread safety doesn't gain much on this point. The reaction to *user* action is quick (mouse and keyboard), the reaction to events coming from outside is far from satisfactory. My personal opinion it's only nice for QuickSort vs. Bubble Sort demoes. Ever thought of applications which receive data from a number of external sources and should display them and react accordingly? They outnumber the applications where a user just sits there and plays with mouse. And they're commercial application which need a good solid software, and a pleasant look. I'm talking of application where the input devices are a combination of network connection plus barcode readers, badge readers, electronic scales, access controls, etc. etc. You find them in POS, in hotels, in company stores, in cash dispensers, in taxi companies, in airports, wherever. The multiple sources require multithreading, and fast response to external events, combined with fast update of display, and with human interaction. There's no RAD worth mentioning today to provide the GUI for all those applications. Giuliano _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] SqlDB component madness
On 13/12/2007, John [EMAIL PROTECTED] wrote: I did put some stuff in the wiki: http://wiki.freepascal.org/SQLdb_Package. Perhaps that doesn't count. Certainly it could be improved. I'll have a look there thanks, but I was actually referring to the class documentation created by fpdoc. So when I press F1 in Lazarus I'll find some help on a class or method. Regards, - Graeme - ___ fpGUI - a cross-platform Free Pascal GUI toolkit http://opensoft.homeip.net/fpgui/ _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] vote for bdd related component icon
I propose these icons. Just trying to help, again. :-D -Bee- has Bee.ography at: http://beeography.wordpress.com inline: tsqlquery.pnginline: tsqltransaction.pnginline: todbc.png
Re: [lazarus] Making GTK Thread Safe
On 13/12/2007, Antonio Sanguigni [EMAIL PROTECTED] wrote: I must confess I don't know too much of GTK1/2 but, for example if fpGUI is a framework from scratch indipendent from GTK, simply sending asynchronous messages to the main thread should work well ? It can elaborate the messages This is exactly why I asked about using messages. :) fpGUI has it's own message system implemented (something like Windows), but for all supported platforms. I haven't tested threading with fpGUI yet, but it's on the top of my todo list. Regards, - Graeme - ___ fpGUI - a cross-platform Free Pascal GUI toolkit http://opensoft.homeip.net/fpgui/ _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] vote for bdd related component icon
I propose these icons. Just trying to help, again. :-D Again. -Bee- has Bee.ography at: http://beeography.wordpress.com inline: thtmlhelpdatabase.pnginline: thtmlbrowserhelpviewer.png
Re: [lazarus] vote for bdd related component icon
I propose these icons. Just trying to help, again. :-D Sorry... todbc should be todbcconnection. -Bee- has Bee.ography at: http://beeography.wordpress.com _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] Lazarus and FPC packages for PCLinuxOS 2007...
On 13/12/2007, S.Anıl Yılmaz [EMAIL PROTECTED] wrote: PCLinuxOS is a KDE based desktop distro derived from Mandriva and for now, is at the top spot at Distrowatch.com And I was just about to ask What is PCLinuxOS? as I have heard the name fly by in a few daily news posts. :) Good to here FPC and Lazarus are getting a bit more attention in the Linux distro's. Why must distro's always be 90% C programming based! Regards, - Graeme - ___ fpGUI - a cross-platform Free Pascal GUI toolkit http://opensoft.homeip.net/fpgui/ _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] Making GTK Thread Safe
On 13/12/2007, Giuliano Colla [EMAIL PROTECTED] wrote: Delphi relied on Windows buggy behavior of sending frequent useless messages around to wake up the main thread frequently. That does sound weird. Idle, so that the OnIdle handler is never called. My kludge has been to have the Timer update a Label in a hidden corner of the screen, with a So if the corner of the screen is hidden, how does that look? What's there, a black hole. ;-) I'm just teasing! must be drawn and what not, etc.), and passes that to a graphic thread which is the only one which has access to the display, then you have a real multithread GUI, which could fill a void in what's currently available. It could be a challenging project, don't you think? Challenging to say the least, but sounds interesting! Regards, - Graeme - ___ fpGUI - a cross-platform Free Pascal GUI toolkit http://opensoft.homeip.net/fpgui/ _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] vote for bdd related component icon
I propose these icons. Just trying to help, again. :-D More. Actually, these are originally from Laurent's images. I'm just recompose them for other components images. ;) -Bee- has Bee.ography at: http://beeography.wordpress.com inline: tprocess.pnginline: tprintdialog.pnginline: tprintersetupdialog.pnginline: tpagesetupdialog.png
Re: [lazarus] Making GTK Thread Safe
On Thursday 13 December 2007 01.28, Giuliano Colla wrote: [...] The screen is a shared resource, so it must be granted exclusive access. If one thinks of one main thread which besides doing its job receives messages from all the worker threads, creates a clean queue of what needs to be done (sorting out what's visible and what not, what must be drawn and what not, etc.), and passes that to a graphic thread which is the only one which has access to the display, then you have a real multithread GUI, which could fill a void in what's currently available. It could be a challenging project, don't you think? It just requires a not too large GUI system already existing (such as fpGui, not Lazarus which is too big to play with) and some enthusiasm (and also a lot of time, but for my company it could be important, so some resources could be found). Don't forget MSEide+MSEgui: http://sourceforge.net/projects/mseide-msegui MSEgui has several possibilities to synchronize worker threads with the main GUI thread. First there is application.lock/unlok which works on a mutex. The main eventloop acquires the mutex on start of a new round of the main eventloop and releases it after it gets idle. Secondly there is application.synchronize which runs a callback in a try/finally block with application.lock/unlock. Thirdly there is application.postevent in order to send messages to MSEgui components. The posted events are feed into the main event queue and are delivered to the component in context of the main thread. application.postevent is thread safe and does not block. tmsecomponent.postcomponentevent and asyncevent can be used for convenience, tmseform tmsedatamodule have onevent and onasyncevent where the messages can be handled in context of the main thread. Fourthly there is FPC synchronize with the problem that checksynchronize is called once in onidle of then main event loop. One can call application.wakeupguithread to enable processing but there is a race condition. Worth to mention is teventthread with its own message queue. The graphic subsystem has its own locking mechanism so it is possible to draw onto off screen canvas (pixmap or printer) from worker threads. Martin _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] Lazarus and FPC packages for PCLinuxOS 2007...
Good to here FPC and Lazarus are getting a bit more attention in the Linux distro's. Why must distro's always be 90% C programming based! I think fpc still can't unseat gcc position for console or system programming on Linux, at least in the short run. But, I believe Lazarus will be getting more and more attentions on Linux GUI programming, if we can keep the development active. Yes, there are some IDEs on Linux, but AFAIK there's no really IDE as good as Lazarus with complete RTL and class/library which enable developers focus on the development process instead of the compiling and deployment process. :-P wince platform support is also a strong point that make FPC, especially Lazarus, getting more and more attentions. Congrats! ;) -Bee- has Bee.ography at: http://beeography.wordpress.com _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
Re: [lazarus] vote for bdd related component icon
2007/12/13, Bee [EMAIL PROTECTED]: I propose these icons. Just trying to help, again. :-D -Bee- has Bee.ography at: http://beeography.wordpress.com tsql... Are not in the standard palette, it must have the same style ? Thanks -- Laurent. My Components: http://wiki.lazarus.freepascal.org/Wile64 French Forum : http://lazforum-fr.tuxfamily.org/index.php
Re: [lazarus] vote for bdd related component icon
And please you use separate thread next time. Your messages are not related to vote for bdd. Ahhh... I apologize for my stupid mistake. :( I'm too enthusiastic about this icon things. :-D -Bee- has Bee.ography at: http://beeography.wordpress.com _ To unsubscribe: mail [EMAIL PROTECTED] with unsubscribe as the Subject archives at http://www.lazarus.freepascal.org/mailarchives
