fltk/test/fast_slow.fl

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# data file for the Fltk User Interface Designer (fluid)
version 1.0400
header_name {.h}
code_name {.cxx}
Function {} {open
} {
Fl_Window {} {open
xywh {397 202 318 443} type Double hide resizable
} {
Fl_Slider control {
label {move
this}
callback {fast->value(o->value());
if (!Fl::pushed()) slow->value(o->value());}
xywh {90 200 30 200}
code0 {o->when(FL_WHEN_CHANGED|FL_WHEN_RELEASE|FL_WHEN_NOT_CHANGED);}
}
Fl_Slider fast {
label {fast
redraw} selected
xywh {140 200 30 200}
code0 {o->set_output();}
}
Fl_Slider slow {
label {slow
redraw} selected
xywh {190 200 30 200}
code0 {o->set_output();}
}
Fl_Box {} {
label {The left slider has changed( FL_WHEN_CHANGED | FL_WHEN_RELEASE | FL_WHEN_NOT_CHANGED) so it produces a callback on both drag and release mouse events.
The middle slider (representing a widget with low overhead) is changed on every mouse movement.
The right slider (representing a widget with high overhead) is only updated when the mouse is released, by checking if Fl::pushed() is zero.}
xywh {10 10 300 180} box DOWN_BOX color 53 selection_color 47 labelfont 4 labelsize 12 align 148
}
}
}