+/* $Id$
+
+This file is part of libmspgltk
+Copyright © 2007 Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+
#include "slider.h"
namespace Msp {
min(0),
max(1),
value(0),
- step(0.1)
-{
-}
+ step(0.1),
+ dragging(false),
+ drag_area_size(0)
+{ }
void Slider::set_value(double v)
{
+ double old_value=value;
+
if(v<min)
value=min;
else if(v>max)
unsigned steps=static_cast<unsigned>((v-min)/step+0.5);
value=min+steps*step;
}
+
+ if(value!=old_value)
+ signal_value_changed.emit(value);
+}
+
+void Slider::set_range(double a, double b)
+{
+ min=a;
+ max=b;
+ set_value(value);
+}
+
+void Slider::set_step(double s)
+{
+ step=s;
+ set_value(value);
+}
+
+void Slider::start_drag(int p)
+{
+ dragging=true;
+ drag_start_pos=p;
+ drag_start_value=value;
+ state|=ACTIVE;
+}
+
+void Slider::drag(int p)
+{
+ if(max>min)
+ set_value(drag_start_value+(p-drag_start_pos)*(max-min)/drag_area_size);
+}
+
+void Slider::end_drag()
+{
+ dragging=false;
+ state&=~ACTIVE;
+}
+
+
+Slider::Loader::Loader(Slider &s):
+ Widget::Loader(s)
+{
+ add("range", &Slider::min, &Slider::max);
+ add("step", &Slider::step);
+ add("value", &Slider::value);
+}
+
+Slider &Slider::Loader::get_object() const
+{
+ return static_cast<Slider &>(wdg);
}
} // namespace GLtk