Add a page size feature to Slider

[libs/gltk.git] / source / slider.h

diff --git a/source/slider.h b/source/slider.h
index c88c15b9f10f84354db7a36465fb53019ecfb2b2..4260564a9f9985d80a0a7dc9171ae506beda6eaa 100644 (file)
--- a/source/slider.h
+++ b/source/slider.h
@@ -1,24 +1,90 @@
 #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 and logic for sliders but can't be instantiated.  Use HSlider
+or VSlider depending on which direction you want the slider to be in.
+*/
 class Slider: public Widget
 {
+public:
+       class Loader: public DataFile::DerivedObjectLoader<Slider, Widget::Loader>
+       {
+       public:
+               Loader(Slider &);
+       };
+
+protected:
+       enum Direction
+       {
+               HORIZONTAL,
+               VERTICAL
+       };
+
+public:
+       sigc::signal<void, double> signal_value_changed;
+
+protected:
+       Direction dir;
+       double min, max;
+       double value;
+       double step;
+       double page_size;
+
+       bool dragging;
+       double drag_start_pos;
+       double drag_start_value;
+       unsigned drag_area_size;
+       unsigned drag_area_offset;
+       unsigned slider_min_size;
+       unsigned slider_size;
+       unsigned total_margin;
+
+       Slider(Direction);
+
 public:
        void set_value(double);
        void set_range(double, double);
        void set_step(double);
+       void set_page_size(double);
        double get_value() const { return value; }
+
 protected:
-       double min, max;
-       double value;
-       double step;
+       virtual void autosize_special(const Part &, Geometry &) const;
+       virtual void rebuild_special(const Part &);
+
+public:
+       virtual void button_press(int, int, unsigned);
+       virtual void button_release(int, int, unsigned);
+       virtual void pointer_motion(int, int);
+
+protected:
+       virtual void on_size_change();
+       virtual void on_style_change();
+};
+
+
+class VSlider: public Slider
+{
+public:
+       VSlider(): Slider(VERTICAL) { }
+
+       virtual const char *get_class() const { return "vslider"; }
+};
+
+class HSlider: public Slider
+{
+public:
+       HSlider(): Slider(HORIZONTAL) { }
 
-       Slider(const Resourcres &);
+       virtual const char *get_class() const { return "hslider"; }
 };
 
 } // namespace GLtk