[Lazarus] Doing work in FormActivate
Hi, Sometimes I used OnActivate event in Delphi for do some work and e.g. show a progressbar to the user. But with Lazarus this thing not working. Form showed up after the OnActivate finished. Is it bug http://bugs.freepascal.org/view.php?id=10654 . Can anybody have a good solution for this problem? And and another question. Every time when the form activated the OnActivate event triggered, after switched to another app and switched back etc. I try to eliminate this by write if Active then Exit; to the OnActivate but in this case things after the if Activate... line never triggered. Gabor ___ Lazarus mailing list Lazarus@lazarus.freepascal.org http://www.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Doing work in FormActivate
My main problem is the form not appears on the screen under OnActivate event. How can I make a progress form, display some informations, progress bars etc. and when the job finished the user can read the information and then close the form with a button? Doug Chamberlin írta: For Windows the OnActivate event should fire every time the window is re-activated as you describe. This is as designed. If you want to process something only once when the window is first activated try the OnShow event. If you must run some code only once but still within the OnActivate handler, the best way I have found is to add a field to the TForm that indicates the OnActivate has been run once. I usually use FActivated: Boolean for this. Then in the OnActivate handler put: if not FActivated then begin //Do some work here that should only happen once FActivated := True; end; ___ Lazarus mailing list Lazarus@lazarus.freepascal.org http://www.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Doing work in FormActivate
Hi,
A simple test case:
procedure TForm1.FormActivate(Sender: TObject);
begin
Caption:=FormatDateTime('hh:mm:ss',Now);
end;
With Delphi the form's caption show the first activation time and with
Lazarus the caption changed when switch to other application and switch
back etc.. I don't say Delphi is correct but after working many years
with Delphi this thing is strange for me.
Gabor
Doug Chamberlin írta:
You have confused me here. What did you mean by this?
As far as I can tell this is exactly how Delphi performs under Windows
and exactly how it should perform. What am I missing?
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[Lazarus] File encoding changing silently
Hi, I am fighting with an ansi/unicode/utf8 problem and during this war observed a strange thing for me about file encoding. When a new project created the encoding is CP1250 (from File Setting/Encoding ) for me. Then saved the project the encoding is CP1250 in File Setting/Encoding. But when reopen the project (with or without close Lazarus) Encoding displays UTF8. Is it normal? Lazarus convert encoding automatically or new files created with UTF8 but File Setting/Encoding display wrong value? Gabor ___ Lazarus mailing list Lazarus@lazarus.freepascal.org http://www.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] File encoding changing silently
I discovered next things. Created new project and encoding is UTF8. It is good. But set encoding to CP1250 and go into File Settings/Encoding no check appears before any item. But this problem showed only once. Second problem. The files created with UTF8 now. Right. But if set Encoding to CP1250 (after pressed Change file) File Settings/Encoding displays good CP1250 value but if reopen the project the File Settings/Encoding displays UTF-8 again. Gabor Mattias Gärtner írta: Zitat von Gabor Boros gaborbo...@yahoo.com: I fixed one place in r18166. Please test. ___ Lazarus mailing list Lazarus@lazarus.freepascal.org http://www.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] File encoding changing silently
Mattias Gärtner írta: Zitat von Gabor Boros gaborbo...@yahoo.com: Are you sure? Is there a menu item with a bracket? No. ;-) Before, I said CP1250 but now I say Ansi(cp1250). When click on Ansi(cp1250) and after go to Encoding again, Ansi(cp1250) and no other encoding selected. BTW, why do you want to use CP1250 as encoding instead of UTF-8? I don't want. Just playing with encoding setting after you fixed the problem. Gabor ___ Lazarus mailing list Lazarus@lazarus.freepascal.org http://www.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] How can I use TMemDataset
Provide an example for what? I don't understand you. Gabor Joost van der Sluis írta: I don't know how the Lazarus editor works, but for the rest, can you provide an example? ___ Lazarus mailing list Lazarus@lazarus.freepascal.org http://www.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] How can I use TMemDataset
Under test case creation indentified the Append problem.
I used Edit; after Append; and when removed the Edit; the record
inserted properly to the DataSet. Below example works.
But if put the MemDataset to the form set name to DSet add a field with
the object inspector set name to NAME, set type to ftString and size to
20. Remove the first 2 lines after begin (.Create and .FieldDefs.Addd)
the result (dset.txt) contains only the header. With dynamic creation
the file contains the 2 records.
procedure DSet_Test;
var
DSet:TMemDataset;
begin
DSet:=TMemDataset.Create(Self);
DSet.FieldDefs.Add('NAME',ftString,20);
DSet.CreateTable;
DSet.Open;
DSet.Append;
DSet.FieldByName('NAME').Value:='aaa';
DSet.Post;
DSet.Append;
DSet.FieldByName('NAME').Value:='bbb';
DSet.Post;
DSet.SaveToFile('c:\dset.txt');
DSet.Close;
end;
Gabor
Joost van der Sluis írta:
Op maandag 05-01-2009 om 16:50 uur [tijdzone +0100], schreef Gabor
Boros:
Provide an example for what? I don't understand you.
An example application which uses TMemDataset and apply/post/etc that does
not work.
Joost.
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[Lazarus] How can I use TMemDataset
Hi, I want to use an in memory dataset and found TMemDataset. But not working very well. If defined the fields in Object Incpector the whole thing unusable. Appended records with AppendRecord or with Append/Edit/Post not inserted into dataset. If define fields at run-time with FieldDefs.Add Append/Edit/Post working but AppendRecord not and Append/Edit/Post is just working on first try. Tried with FPC 2.2.2 and actual Lazarus SVN. Anybody using TMemDateset? Gabor ___ Lazarus mailing list Lazarus@lazarus.freepascal.org http://www.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] How can I use TMemDataset
The result is same with CreateTable and without CreateTable. Gabor Joost van der Sluis írta: My guess is that you also have to remove CreateTable? I'll look into it. Joost. ___ Lazarus mailing list Lazarus@lazarus.freepascal.org http://www.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Prevent focus losing
I tried your original problem now (earlier not) and TEdit don't loose focus. TCustomButton have a TabStop property. But TSpeedButton not because derived from TGraphicControl. Gabor This is workaround, thanks for suggestion. Another question: how is implemented focus grabbing in TCustomButton, is there way to disable focus grabbing in TSpeedButton? ___ Lazarus mailing list Lazarus@lazarus.freepascal.org http://www.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Prevent focus losing
Hi, Why not use CustomEdit1.SetFocus in CustomSpeedButton1.Click? Gabor Hello, situation: I have TCustomEdit and TCustomSpeedButton; when focus is in edit and I press speed button then edit loses focus. How to prevent losing focus when I press speed button? ___ Lazarus mailing list Lazarus@lazarus.freepascal.org http://www.lazarus.freepascal.org/mailman/listinfo/lazarus
