+void HSlider::button_press(int x, int y, unsigned btn)
+{
+ if(geom.is_inside(x, y))
+ {
+ int sw=get_slider_width();
+ int sx=static_cast<int>((geom.w-sw)*(value-min)/(max-min));
+ if(btn==1 && x>=sx && x<sx+sw)
+ {
+ dragging=true;
+ state=ACTIVE;
+ drag_start_x=x;
+ drag_start_value=value;
+ }
+ }
+}
+
+void HSlider::button_release(int, int, unsigned btn)
+{
+ if(btn==1)
+ {
+ dragging=false;
+ state=NORMAL;
+ }
+}
+
+void HSlider::pointer_motion(int x, int)
+{
+ if(dragging)
+ {
+ set_value(drag_start_value+(x-drag_start_x)*(max-min)/(geom.w-get_slider_width()));
+ }
+}
+
+void HSlider::render_part(const Part &part) const