fast_slow.fl

# data file for the FLTK User Interface Designer (FLUID)
version 2.0001 
images_dir ./ 
header_name {.h} 
code_name {.cxx} 
gridx 10 
gridy 10 
snap 3
Function {} {open
} {
  Fl_Window {} {open
    xywh {143 188 318 443} resizable visible
  } {
    Fl_Slider control {
      label {move
this}
      callback {fast->value(o->value());
if (!Fl::pushed()) slow->value(o->value());}
      xywh {90 200 30 200}
      extra_code {o->when(FL_WHEN_CHANGED|FL_WHEN_RELEASE|FL_WHEN_NOT_CHANGED);}
    }
    Fl_Slider fast {
      label {fast
redraw}
      xywh {140 200 30 200}
      extra_code {o->set_output();}
    }
    Fl_Slider slow {
      label {slow
redraw}
      xywh {190 200 30 200}
      extra_code {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.} selected
      xywh {10 10 300 180} align 148 box DOWN_BOX color 53 selection_color 47
    }
  }
}