+/* $Id$
+
+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)
+ value = max;
+ else
+ {
+ 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;
+ min = a;
+ max = b;
set_value(value);
}
void Slider::set_step(double s)
{
- step=s;
+ step = s;
set_value(value);
}
-void Slider::set_value(double v)
+void Slider::start_drag(int p)
+{
+ dragging = true;
+ drag_start_pos = p;
+ drag_start_value = value;
+ state |= ACTIVE;
+}
+
+void Slider::drag(int p)
{
- double old_value=value;
+ if(max>min)
+ set_value(drag_start_value+(p-drag_start_pos)*(max-min)/drag_area_size);
+}
- if(v<min)
- value=min;
- else if(v>max)
- value=max;
- else
- {
- unsigned steps=static_cast<unsigned>((v-min)/step+0.5);
- value=min+steps*step;
- }
+void Slider::end_drag()
+{
+ dragging = false;
+ state &= ~ACTIVE;
+}
- if(value!=old_value)
- signal_value_changed.emit(value);
+
+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