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STR #1394
| Application: | FLTK Library |
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| Status: | 5 - New |
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| Priority: | 3 - Moderate, e.g. unable to compile the software |
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| Scope: | 2 - Specific to an operating system |
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| Subsystem: | Unassigned |
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| Summary: | Adding GlWindow to a window after show() is called causes crash |
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| Version: | 2.0-current |
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| Created By: | greg.ercolano |
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| Assigned To: | Unassigned |
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| Fix Version: | Unassigned |
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| Update Notification: | |
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Trouble Report Files:
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Trouble Report Comments:
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| #1 | greg.ercolano
12:04 Aug 19, 2006 |
| This is under fedora3, but might be under other OS's too.
-------- snip
#include <fltk/run.h>
#include <fltk/GlWindow.h>
#include <fltk/Window.h>
#include <fltk/gl.h>
class MyGlWindow : public fltk::GlWindow {
void draw() {
if (!valid())
{ valid(1); glLoadIdentity(); glViewport(0,0,w(),h()); }
glClearColor(1.0,0.0,0.0,1.0);
glClear(GL_COLOR_BUFFER_BIT);
}
public:
MyGlWindow(int x, int y, int w, int h) : fltk::GlWindow(x,y,w,h) { }
};
int main() {
fltk::Window fig(400,400);
fig.resizable(fig);
fig.show(); // (A)
fig.begin();
MyGlWindow mygl(0,0,400,400);
mygl.end();
fig.end();
//fig.show(); // (B)
fltk::run();
}
-------- snip
FLTK crashes if you uncomment (A), and comment (B).
It runs fine if you switch to comment (A) and *uncomment* (B).
So it seems if one tries to create the GL window after
calling show(), you'll get the crash. Hopefully it wouldn't
be a problem to do this, as I could see where one wants to dynamically
add a GlWindow to a Window, after the Window has been created and show()n. (See Herbert Egger's 8/18/06 post on fltk.opengl) | |
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