Re: [Lazarus] SQLite: How to create lookup fields?
User escreveu: Hi again, my TSQLite3Dataset components: DatasetSales with the fields: Code, Item, Amount, Price, Vendor DatasetItems with the fields: Code, Description I do not want that the lookup field to be editable. My new code: procedure TForm1.FormCreate(Sender: TObject); var TempField: TStringField; begin DatasetSales.Active := true; TempField := TStringField.Create(DatasetSales); with TempField do begin FieldName := 'New field'; Lookup := True; FieldKind := fkLookup; KeyFields := 'Item'; LookupDataSet := DatasetItems; LookupKeyFields := 'Code'; LookupResultField := 'Description'; DatasetSales := Self.DatasetSales; end; end; but nothing happen. Why? 1) There's a bug in your code: DatasetSales := Self.DatasetSales; should be Dataset := DatasetSales; and Active should be set after the field setup. Another caution is to have DatasetItems opened before DatasetSales 2) It's not implemented in TSqlite3Dataset I looked at the implementation and got how it works, so i can implement in Sqlite3Dataset soon. Luiz ___ Lazarus mailing list Lazarus@lazarus.freepascal.org http://www.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] SQLite: How to create lookup fields?
On Fri, Dec 26, 2008 at 11:28, User usuarioanonimomy...@gmail.com wrote: Hi again, my TSQLite3Dataset components: My new code: [skip] but nothing happen. Why? Because, as I already pointed out: On Thu, Dec 25, 2008 at 21:05, Alexander Klenin kle...@gmail.com wrote: It seems to be implemented in SQLdb (TBufDataset). So, in addition to the above, original poster should indeed drop sqlitedataset. Perhaps TSQLite3Connection can be ised instead? -- Alexander S. Klenin ___ Lazarus mailing list Lazarus@lazarus.freepascal.org http://www.lazarus.freepascal.org/mailman/listinfo/lazarus
[Lazarus] console gets crazy
Hello, after one of my applications has finished my console output gets corrupted. Looks like this after pressing return... no carriage return is made, just one big line. das...@daseeb-laptop:~/devel/cactusjukebox$ das...@daseeb-laptop:~/devel/cactusjukebox$ das...@daseeb-laptop:~/devel/cactusjukebox$ das...@daseeb-laptop:~/devel/cactusjukebox$ das...@daseeb-laptop:~/devel/cactusjukebox$ Any text I enter is not shown. Where do I have to look for to solve this problem? It only occurs when I load an external library... but no seg fault or anything. Just a corrupted console after exit. Any ideas where I have to look for? Sebastia -- Sensationsangebot verlängert: GMX FreeDSL - Telefonanschluss + DSL für nur 16,37 Euro/mtl.!* http://dsl.gmx.de/?ac=OM.AD.PD003K1308T4569a ___ Lazarus mailing list Lazarus@lazarus.freepascal.org http://www.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] console gets crazy
On Fri, 26 Dec 2008 12:55:01 +0100 Sebastian Kraft sebastian_kr...@gmx.de wrote: Hello, after one of my applications has finished my console output gets corrupted. Looks like this after pressing return... no carriage return is made, just one big line. das...@daseeb-laptop:~/devel/cactusjukebox$ das...@daseeb-laptop:~/devel/cactusjukebox$ das...@daseeb-laptop:~/devel/cactusjukebox$ das...@daseeb-laptop:~/devel/cactusjukebox$ das...@daseeb-laptop:~/devel/cactusjukebox$ Any text I enter is not shown. Where do I have to look for to solve this problem? It only occurs when I load an external library... but no seg fault or anything. Just a corrupted console after exit. Any ideas where I have to look for? Try typing resetenter Mattias ___ Lazarus mailing list Lazarus@lazarus.freepascal.org http://www.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] console gets crazy
Any ideas where I have to look for? Try typing resetenter This works... Thanks! But where does this behaviour come from? Is there a problem with my program? How could I solve this at the root? Sebastian -- Sensationsangebot verlängert: GMX FreeDSL - Telefonanschluss + DSL für nur 16,37 Euro/mtl.!* http://dsl.gmx.de/?ac=OM.AD.PD003K1308T4569a ___ Lazarus mailing list Lazarus@lazarus.freepascal.org http://www.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] console gets crazy
On Fri, 26 Dec 2008 14:44:09 +0100 Sebastian Kraft sebastian_kr...@gmx.de wrote: Any ideas where I have to look for? Try typing resetenter This works... Thanks! But where does this behaviour come from? Is there a problem with my program? How could I solve this at the root? Some shells reacts to special characters (#32). Check if you are writing special characters. Mattias ___ Lazarus mailing list Lazarus@lazarus.freepascal.org http://www.lazarus.freepascal.org/mailman/listinfo/lazarus
[Lazarus] MaskEdit: question on how it should behave
Hi, I'm currently working on the MaskEdit unit, which is ATM not totally Delphi compatible ;) Since I only have an ancient Delphi (D3) (on ancient hardware, so I cannnot even run newer versions) I have some questions on the behaviour of MaskEdit in current delphi versions. Question 1: If I set the text of a MaskEdit to some value that does not match the mask (e.g. EditMask = '' and then MaskEdit.Text := 'ABCD'), in D3 no exception is raised and the text in the control is set. Is this still the case in current Delphi's? (In Lazarus ATM an Exception is raised if you try to do that) Question 2: What does an exclamationmark (!) in a mask actually do. The helptext says it removes leading spaces from the data (what data?) and if no ! is in the mask it removes trailing spaces. In real live I see no effect on either MaskEdit.Text or MaskEdit.EditText at all. Question 3: In the EditMask you can specify if the mask will be saved as pasrt of the data (again: what data?). For instance, if your EditMask is '000;0;_' then maskdata is not saved (the first 0 after the colon ( ; ) sets this value). I cannot really figure out what it does. I see noe effect n Text or EditText at all. Regarding questions 2 and 3: I could, of course, try and understand the VCL code, but that would probably increase the risk of writing code that is almost identical to the copyrighted VCL code. Thanks for now. Bart ___ Lazarus mailing list Lazarus@lazarus.freepascal.org http://www.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] MaskEdit: question on how it should behave
On Sat, Dec 27, 2008 at 10:07, Bart bartjun...@gmail.com wrote: Question 1: If I set the text of a MaskEdit to some value that does not match the mask (e.g. EditMask = '' and then MaskEdit.Text := 'ABCD'), in D3 no exception is raised and the text in the control is set. Is this still the case in current Delphi's? (In Lazarus ATM an Exception is raised if you try to do that) I am not sure how modern Delphi behaves, but I'd say that Lazarus way is correct here -- this is clearly a programmes's error. OTOH, I think it would be useful to provide a separate function like 'TrySetText' which whould return false instead if saising an exception. Question 3: In the EditMask you can specify if the mask will be saved as pasrt of the data (again: what data?). For instance, if your EditMask is '000;0;_' then maskdata is not saved (the first 0 after the colon ( ; ) sets this value). I cannot really figure out what it does. I see noe effect n Text or EditText at all. If you mask includes non-special characters, those are displayed in the editor as-is, e.g. if mask is 000-00-00 and the user enters 1234567, the editor would contain 123-45-67. Depending on the value of the flag, the actual Text property will contain either 1234567 or 123-45-67. -- Alexander S. Klenin ___ Lazarus mailing list Lazarus@lazarus.freepascal.org http://www.lazarus.freepascal.org/mailman/listinfo/lazarus
