X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fslider.h;h=6612c619aaaea80ae2445cd548edd9d38fcd742e;hb=1bc84ded58379ee24315db8784d9fb710a02e24e;hp=c88c15b9f10f84354db7a36465fb53019ecfb2b2;hpb=c1f038acb91eb3bfaa34dfd4729d19ed3f871a42;p=libs%2Fgltk.git

diff --git a/source/slider.h b/source/slider.h
index c88c15b..6612c61 100644
--- a/source/slider.h
+++ b/source/slider.h
@@ -1,24 +1,50 @@
 #ifndef MSP_GLTK_SLIDER_H_
 #define MSP_GLTK_SLIDER_H_
 
+#include <sigc++/sigc++.h>
 #include "widget.h"
 
 namespace Msp {
 namespace GLtk {
 
+/**
+Sliders are used to adjust numeric values visually.  This class provides the
+common interface for sliders - see classes HSlider and VSlider for concrete
+variations.
+*/
 class Slider: public Widget
 {
 public:
-	void set_value(double);
-	void set_range(double, double);
-	void set_step(double);
-	double get_value() const { return value; }
+	class Loader: public DataFile::DerivedObjectLoader<Slider, Widget::Loader>
+	{
+	public:
+		Loader(Slider &);
+	};
+
+	sigc::signal<void, double> signal_value_changed;
+
 protected:
 	double min, max;
 	double value;
 	double step;
 
-	Slider(const Resourcres &);
+	bool dragging;
+	double drag_start_pos;
+	double drag_start_value;
+	unsigned drag_area_size;
+
+	Slider();
+
+public:
+	void set_value(double);
+	void set_range(double, double);
+	void set_step(double);
+	double get_value() const { return value; }
+
+protected:
+	void start_drag(int);
+	void drag(int);
+	void end_drag();
 };
 
 } // namespace GLtk