listviewdialog result
lazarus / 43-Android

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zariq · 2013-01-30 09:23

hello everyone.

I would like to ask about an issue with listviewdialog. If changes are
made in OnListViewDialogResult they don't show up until the form is
clicked. As an example if you change the caption of a label, then the
label's caption gets changed but it doesn't show on the screen until
the form gets clicked. If you want to show another form depending on
the user's choice, then after the listviewdialog has disappeared,
again nothing happens until the form is clicked, then the new form
shows.

lazarus 1.1-39905
windows 7

thanks.

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wjackson153 · 2013-01-30 09:33

Perhaps update or refresh
or put in on change event?

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zariq · 2013-01-30 09:53

Quote from: wjackson153 on January 30, 2013, 10:33:05 amPerhaps update
or refresh
or put in on change event?

Have tried refresh, update, invalidate, repaint, have i missed
anything?

Haven't thought about onchange, but the listview is called via jni and
onlistviewdialogresult is the equivalent for onchange.

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wjackson153 · 2013-01-30 10:04

on create, on activate, on show

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zariq · 2013-01-30 15:02

A bit more information

The code is from here.

http://wiki.lazarus.freepascal.org/Android_Interface#Using_the_Native_
ListView_Dialog

Code: [Select]procedure TForm1.Button1Click(Sender: TObject);
begin
  {$ifdef Android}
  CDWidgetSet.ShowListViewDialog('Dialog Title',
    ['Title1', 'Title2', 'Title3', 'Title4', 'Title5',
'Title6','Title7','Title8'],
    ['Descr1', 'Descr2', 'Descr3', 'Descr4', 'Descr5',
'Descr6','Descr7','Descr8']);
  {$endif}
end;

Code: [Select]procedure TForm1.MyOnListViewDialogResult(ASelectedItem:
Integer);
begin
   label1.caption := 'new value';
   form2.show;
   DebugLn(label1.caption);
end;
When the dialog disappears form1 is still showing on the screen.
Logcat shows that label1's caption has changed to "new value" but
label1 is still showing the old value. If the back key is pressed on
the emulator or phone then form1 is still showing on the screen and
label1 shows the new correct value. Instead of the back button if you
click somewhere on the form then then form2 shows. When returning back
to form1 label1 has the correct "new value".