View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0018480 | Lazarus | Widgetset | public | 2011-01-12 22:07 | 2017-04-25 09:58 |
| Reporter | cobines | Assigned To | Ondrej Pokorny | ||
| Priority | normal | Severity | minor | Reproducibility | always |
| Status | resolved | Resolution | fixed | ||
| Platform | Win32 | OS | Windows XP | ||
| Product Version | 0.9.31 (SVN) | ||||
| Summary | 0018480: Main form icon dissappears from Alt-Tab task list when form with ShowInTaskBar=stAlways active | ||||
| Description | With a form with ShowInTaskbar=stAlways is activated the icon for the main form dissappears from the Alt-Tab list. The taskbar buttons stay the same. The behaviour is the same even when I switch ShowInTaskbar for main form from stDefault to stAlways. I would assume a form with ShowInTaskbar=stAlways behaves like a separate window so I can switch with Alt-Tab between the forms even though it belongs to the same application. | ||||
| Steps To Reproduce | Run attached application. You will have two taskbar buttons. Switch to Form2 using Alt-Tab. Press and hold Alt-Tab - there is no icon for Form1. Activate Form1 by clicking mouse on it. Press and hold Alt-Tab - the icon is back. | ||||
| Tags | patch | ||||
| Fixed in Revision | |||||
| LazTarget | - | ||||
| Widgetset | Win32/Win64 | ||||
| Attached Files |
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| related to | 0018484 | acknowledged | Taskbar button icon sometimes disappears | |
| related to | 0022587 | resolved | Ondrej Pokorny | Two thumnails on taskbar when ShowInTaskBar is stAlways |
| related to | 0020864 | closed | yang jixian | ShowInTaskbar = stAlways Bug of MainForm on Windows and TWin32WidgetSet(WidgetSet).AppHandle Bug |
| related to | 0031248 | closed | Ondrej Pokorny | TForm.ShowInTaskBar = stAlways works only when form show on first time, and not work on next times. |
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2011-01-12 22:07
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Hi there is hotfix to fix this issue (for 0.9.30.2RC2) idea behind is that if window should have separate taskbar button it should be parented with desktop window (parent HWND = 0) instead of using extended window style. This is not a perfect code but it's fully functional, there should be removed usage of FlagsEx and possibly passed additional parameter to create desktop parented window Also in order to work correctly with Win7 Win+Tab feature main form window also should be desktop parented (no extended style) |
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2011-11-12 19:46
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win32wscontrols.pp.patch (598 bytes)
Index: win32wscontrols.pp
===================================================================
--- win32wscontrols.pp (revision 33466)
+++ win32wscontrols.pp (working copy)
@@ -161,7 +161,12 @@
FlagsEx := CreateParams.ExStyle;
Parent := CreateParams.WndParent;
if (Parent = 0) then
- Parent := Win32WidgetSet.AppHandle;
+ begin
+ if ((FlagsEx and WS_EX_APPWINDOW) <> 0) then
+ FlagsEx := FlagsEx and not WS_EX_APPWINDOW
+ else
+ Parent := Win32WidgetSet.AppHandle;
+ end;
StrCaption := CreateParams.Caption;
Left := CreateParams.X;
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Fixed in the meantime |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2011-01-12 22:07 | cobines | New Issue | |
| 2011-01-12 22:07 | cobines | File Added: alt_tab_noicon.zip | |
| 2011-01-12 22:07 | cobines | Widgetset | => Win32/Win64 |
| 2011-02-07 20:37 | Vincent Snijders | LazTarget | => - |
| 2011-02-07 20:37 | Vincent Snijders | Status | new => acknowledged |
| 2011-11-11 22:33 | VitaliyG | Note Added: 0054022 | |
| 2011-11-12 19:46 | VitaliyG | File Added: win32wscontrols.pp.patch | |
| 2012-10-02 00:29 | Juha Manninen | Relationship added | related to 0020864 |
| 2012-10-02 00:33 | Juha Manninen | Relationship added | related to 0018484 |
| 2012-10-02 00:35 | Juha Manninen | Relationship added | related to 0022587 |
| 2017-04-24 21:44 | Juha Manninen | Relationship added | related to 0031248 |
| 2017-04-25 09:39 | Juha Manninen | Tag Attached: patch | |
| 2017-04-25 09:58 | Ondrej Pokorny | Note Added: 0099900 | |
| 2017-04-25 09:58 | Ondrej Pokorny | Status | acknowledged => resolved |
| 2017-04-25 09:58 | Ondrej Pokorny | Resolution | open => fixed |
| 2017-04-25 09:58 | Ondrej Pokorny | Assigned To | => Ondrej Pokorny |
