Hi,
seems as if widgets placed onto a Fl_Scroll don't keep their positions on
scrolling.
E.g.: the topmost widget's y-position is 30. There is a vertical scrollbar due
to another widget with y-position 300.
Pull the vertical scrollbar down and move it back to its top position. The
y-value of the topmost widget will be 0. I would expect it keeping its original
value. Am I wrong or is FLTK?
Here's my code. OS is Linux Mint 12, FLTK 1.3.0.
#include <FL/Fl.H>
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_Group.H>
#include <FL/Fl_Scroll.H>
#include <FL/fl_draw.H>
#include <FL/Fl_Box.H>
class Box : public Fl_Box {
public:
Box( int x, int y, int w, int h, const char *lbl ) :
Fl_Box( x, y, w, h, lbl )
{
labelcolor( FL_BLACK );
}
protected:
void draw() {
Fl_Box::draw();
fl_draw_box(FL_UP_BOX, x(), y(), w(), h(), FL_YELLOW );
}
};
int main() {
Fl_Double_Window *pWin = new Fl_Double_Window( 100, 100, 300, 300, "Scroll
Tests" );
pWin->box( FL_NO_BOX );
Fl_Scroll scroll( 0, 0, 300, 300 );
scroll.box( FL_DOWN_BOX );
Box box1( 0, 30, 100, 50, "BOX1" );
Box box2( 300, 300, 100, 50, "BOX2" );
scroll.end();
pWin->end();
pWin->resizable( scroll );
pWin->show();
return Fl::run();
}
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