SYSTEM: Linux-2.6.33, X11-7.5, fltk-1.3.x-r7664
An image viewer has an Fl_Group as its canvas. The Fl_Group
is resizable ('main_win->resizable(canvas);'). The geometry of
the images permanently changes. It seems, the Fl_Group cannot
follow these changes.
Example:
Image 1. 100 x 100 OK
Image 2. 50 x 100 The right 50:100 of image 1 remain visible.
Image 3. 100 x 50 OK. The height has changed.
Image 4. 50 x 50 The right 50:100 of image 3 remain visible.
Image 5. 100 x 50 OK
Image 6. 50 x 100 OK. The height has changed.
Image 7. 100 x 100 The right 50:100 are INVISIBLE.
When I overlay the right invisible half of image 7 with a
File Chooser
a) partly e.g. 70:100 and cancel the File Chooser, only the
part 70:100 becomes visible. The stripe 50:70 remains
invisible.
b) completely, the invisible half becomes visible completely.
Is this a bug in the fltk-1.3 library?
The same behaviour can be observed width fltk-1.1.10; fltk-2.0
behaves as wanted: no visibility problem. The fltk::Group shrinks
and extends nicely.
The program fltk-1.3.x-r7664/test/tree seems to behave similarly:
1. I resize the main window down: the widgets at the bottom go down.
2. I resize the main window up: some widgets at the bottom are
invisible now.
3. I slighly resize the main window horizontally: the invisible
widgets are visible again.
winfried
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