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[SOLVED] TButton.OnMouseUp does not trigger
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Topic: [SOLVED] TButton.OnMouseUp does not trigger (Read 2527 times)
ling
New Member
Posts: 14
[SOLVED] TButton.OnMouseUp does not trigger
«
on:
March 03, 2021, 08:12:05 am »
I bind an event to OnMouseUp for TButton, but when the button be clicked, only OnMouseDown and OnClick be triggered, is it a bug?
Lazarus version: 2.0.6
FPC: 3.0.4
macOS Catalina 10.15.7
«
Last Edit: March 16, 2021, 03:14:06 am by ling
»
Logged
lucamar
Hero Member
Posts: 4219
Re: TButton.OnMouseUp does not trigger
«
Reply #1 on:
March 03, 2021, 08:22:28 am »
If you have properly set up events then yes, it looks like a bug, though it might be OS-specific behaviour; I don't know enough about Macos to even guess.
The "normal" chain of events is:
MouseDown,
MouseUp,
Click
Logged
Turbo Pascal 3 CP/M - Amstrad PCW 8256 (512 KB !!!)
Lazarus/FPC 2.0.8/3.0.4 & 2.0.12/3.2.0 - 32/64 bits on:
(K|L|X)Ubuntu 12..18, Windows XP, 7, 10 and various DOSes.
Handoko
Hero Member
Posts: 5154
My goal: build my own game engine using Lazarus
Re: TButton.OnMouseUp does not trigger
«
Reply #2 on:
March 03, 2021, 08:36:21 am »
It works on my Ubuntu Mate 20.10 Lazarus 2.0.10 GTK2.
I wrote a very simple demo to test it. Download and run my code, if it does not work on your computer, please report it to the bugtracker:
https://bugs.freepascal.org/view_all_bug_page.php?project_id=1
Code: Pascal
[Select]
[+]
[-]
unit
Unit1
;
{$mode objfpc}{$H+}
interface
uses
Classes
,
SysUtils
,
Forms
,
Controls
,
Graphics
,
Dialogs
,
StdCtrls
;
type
{ TForm1 }
TForm1
=
class
(
TForm
)
Button1
:
TButton
;
procedure
Button1MouseDown
(
Sender
:
TObject
;
Button
:
TMouseButton
;
Shift
:
TShiftState
;
X
,
Y
:
Integer
)
;
procedure
Button1MouseUp
(
Sender
:
TObject
;
Button
:
TMouseButton
;
Shift
:
TShiftState
;
X
,
Y
:
Integer
)
;
end
;
var
Form1
:
TForm1
;
implementation
{$R *.lfm}
{ TForm1 }
procedure
TForm1
.
Button1MouseDown
(
Sender
:
TObject
;
Button
:
TMouseButton
;
Shift
:
TShiftState
;
X
,
Y
:
Integer
)
;
begin
Button1
.
Caption
:
=
'MouseDown event triggered'
;
end
;
procedure
TForm1
.
Button1MouseUp
(
Sender
:
TObject
;
Button
:
TMouseButton
;
Shift
:
TShiftState
;
X
,
Y
:
Integer
)
;
begin
Button1
.
Caption
:
=
'MouseUp event triggered'
;
end
;
end
.
Logged
ling
New Member
Posts: 14
Re: TButton.OnMouseUp does not trigger
«
Reply #3 on:
March 03, 2021, 10:07:10 am »
@Handoko Thanks for your demo code. I've tried it, mouse up doesn't trigger.
Logged
trev
Global Moderator
Hero Member
Posts: 2020
Former Delphi 1-7, 10.2 user
Re: TButton.OnMouseUp does not trigger
«
Reply #4 on:
March 03, 2021, 10:15:44 am »
It works in macOS 10.14 with Lazarus trunk and FPC 3.0.4 or 3.2.0 or trunk.
Looks like it was fixed in Lazarus 2.0.8 - the OP needs to upgrade! See
Bug #38099
.
I just confirmed that it works in Lazarus 2.0.10 with FPC 3.2.0.
«
Last Edit: March 03, 2021, 10:35:08 am by trev
»
Logged
ling
New Member
Posts: 14
Re: [SOLVED] TButton.OnMouseUp does not trigger
«
Reply #5 on:
March 16, 2021, 02:42:43 pm »
@trev Thanks,
I updated lazarus and fpc to the latest version, it works fine now.
Logged
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[SOLVED] TButton.OnMouseUp does not trigger
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