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STR #1747
| Application: | FLTK Library |
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| Status: | 1 - Closed w/Resolution |
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| Priority: | 4 - High, e.g. key functionality not working |
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| Scope: | 3 - Applies to all machines and operating systems |
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| Subsystem: | Core Library |
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| Summary: | Fl::grab() behavior changed on newer platforms |
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| Version: | 1.3-current |
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| Created By: | StanS |
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| Assigned To: | matt |
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| Fix Version: | 1.3.0 (SVN: v6037) |
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| Update Notification: | |
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Trouble Report Files:
No files
Trouble Report Comments:
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| #1 | StanS
08:23 Jul 23, 2007 |
| Below, when the typedef of Window is Fl_Window, the second
window receives events from all over the screen, as expected.
When the typedef is changed to Fl_Double_Window, the second
window only sees events within itself or within the first window.
#include <FL/Fl.H>
#include <FL/Fl_Double_Window.H>
#include <iostream>
//typedef Fl_Window Window;
typedef Fl_Double_Window Window;
class Win : public Window {
public:
Win(int w, int h, char const* label = 0)
: Window(w, h, label) {;}
int handle(int event)
{
int r = Window::handle(event);
switch(event) {
case FL_PUSH: std::cout << "PUSH\n"; break;
case FL_RELEASE: std::cout << "RELEASE\n"; break;
case FL_KEYDOWN:
if(Fl::event_key() == FL_Escape) {
Fl::release(); hide();
}
break;
}
return r;
}
};
int main()
{
Fl_Double_Window first(300, 300, "First Window");
first.end();
Win second(200, 200, "Second Window");
second.end();
first.show();
second.show();
Fl::grab(&second);
return Fl::run();
} | |
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| #2 | matt
09:40 Oct 06, 2007 |
| Which OS and compiler please? | |
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| #3 | StanS
05:30 Oct 09, 2007 |
| Not exactly state of the art:
uname -sr
SunOS 5.8
CC -V
CC: Sun C++ 5.5 2003/03/12 | |
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| #5 | matt
13:37 Jan 09, 2008 |
| No issues on OS X. All is as expected. | |
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| #6 | wavexx
09:24 Feb 14, 2008 |
| Trying to debug this issue...
Can you describe how the test is supposed to work?
When run under OSX 10.4, two windows appear. Clicking on either produces PUSH/RELEASE events, but clicking outside (on the desktop, for example) does not. The same happens if I change Fl_Window to Fl_Double_Window.
This is identical to the behavior I get on linux (fedora with blackbox).
Nothing changes if I remove "first window" entirely.
Is this expected or grab isn't working at all here? | |
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| #7 | matt
10:44 Feb 20, 2008 |
| It seem that the behavior of exclusively grabbing the mouse was disabled on all supported platfroms by the platform developers. This is useful to avoid individual programs locking up a whole desktop. Grabbing seems to be limited to the time during which a mouse button is held down.
We should note these issues in the documentation. | |
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| #8 | matt
10:58 Feb 20, 2008 |
| Updated the docs.
This issue needs furter investigation. I suggest for 1.2 that we will introduce a fully functional popup window that handles grabbing correctly for every platform. We may have to limit the use of Fl::grab() to mouse-clicks-and-drags only. | |
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| #9 | fabien
05:58 Jan 12, 2009 |
| matt can we close that one now ? | |
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| #10 | matt
06:58 Jan 12, 2009 |
| Yes, I think we can close this. | |
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| #11 | matt
12:48 Feb 19, 2010 |
| Closed | |
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