src/GManager/CairoSlider.hh

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#ifndef GTKMM_EXAMPLE_CAIROSLIDER_H
#define GTKMM_EXAMPLE_CAIROSLIDER_H

#include <gtkmm/eventbox.h>
#include <gtkmm/drawingarea.h>

class CairoSlider : public Gtk::DrawingArea
{
    public:
        CairoSlider();
        ~CairoSlider();

    protected:

        virtual bool on_draw(const Cairo::RefPtr<Cairo::Context>& cr) = 0;

        int get_border();

        double get_percentage();

        void set_percentage(double p);

        virtual void on_percent_change() = 0;

        virtual double get_update_timeout() {
            return 0.05;
        }

        virtual Gdk::RGBA& get_active_color();
        virtual Gdk::RGBA& get_inactive_color();

    private:

        // Signals:

        // These signals should not be overwritten, therefore private
        bool on_button_press_event(GdkEventButton * ev);
        bool on_scroll_event(GdkEventScroll * ev);
        bool on_motion_notify_event(GdkEventMotion * ev);
        bool on_button_release_event(GdkEventButton * ev);

        // Vars:

        // Position frome where black lines are drawn
        int m_volPos;

        // Current percentage
        double currPerc;

        // Calculate the input
        void recalculate(double x, int step);

        // true when 'dragging' with the mousepointer
        bool isDragging;

        // A timer to prevent 'oversetting' percentage
        Glib::Timer m_Timerguard;

        bool col_active_set, col_inactive_set;
        Gdk::RGBA * col_active;
        Gdk::RGBA * col_inactive;
};

#endif // GTKMM_EXAMPLE_CAIROSLIDER_H