gre-ilya/fltk
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Fix documentation of fl_overlay_clear and fl_overlay_rect

Browse Source 
The code example in fl_overlay_clear() wouldn't work.
This commit is contained in:
Albrecht Schlosser 2025-07-24 15:40:18 +02:00
parent 890f538bb5
commit b00ae1eee4
1 changed files with 7 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
src/fl_overlay.cxx
View File

@ -97,26 +97,26 @@ void fl_overlay_clear() {
of the widget. of the widget.
Your event handle should look similar to this (also see `test/mandelbrot.cxx`): Your event handle should look similar to this (also see `test/mandelbrot.cxx`):
``` \code
int MyWidget::handle(int event) { int MyWidget::handle(int event) {
static int ix, iy;
switch (event) { switch (event) {
case FL_PUSH: case FL_PUSH:
ix = Fl::event_x(); iy = Fl::event_y(); ix = Fl::event_x(); // ix defined as (private) class member
iy = Fl::event_y(); // iy defined as (private) class member
return 1; return 1;
case FL_DRAG: case FL_DRAG:
this->make_current(); window()->make_current();
fl_overlay_rect(ix, iy, ix-Fl::event_x(), iy-Fl::event_y()); fl_overlay_rect(ix, iy, Fl::event_x() - ix, Fl::event_y() - iy);
return 1; return 1;
case FL_RELEASE: case FL_RELEASE:
this->make_current(); window()->make_current();
fl_overlay_clear(); fl_overlay_clear();
// select the element under the rectangle // select the element under the rectangle
return 1; return 1;
} }
return MySuperWidget::handle(event); return MySuperWidget::handle(event);
} }
``` \endcode
\note Between drawing an overlay rect and clearing it, the content of the \note Between drawing an overlay rect and clearing it, the content of the
widget must not change. widget must not change.