MapPreview.h

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#ifndef _MAP_PREVIEW_WIDGET_H_
#define _MAP_PREVIEW_WIDGET_H_

#include "math/matrix.h"
#include <gtk/gtkwidget.h>
#include "igl.h"
#include "irender.h"
#include "scenelib.h"

typedef struct _GdkEventExpose GdkEventExpose;

namespace ui
{
    class MapPreview
    {
            // Top-level widget
            GtkWidget* _widget;

            // GL widget
            GtkWidget* _glWidget;

            // Current distance between camera and preview
            GLfloat _camDist;

            // Current rotation matrix
            Matrix4 _rotation;

            // The root node of the scene to be rendered
            scene::Node* _root;

            Shader* _stateSelect1;
            Shader* _stateSelect2;

        private:

            static float getRadius(scene::Node* root);

        public:
            MapPreview ();

            ~MapPreview ();

            void setSize (int size);

            void initialisePreview ();

            operator GtkWidget* ()
            {
                return _widget;
            }

            // Get/set the map root to render
            void setRootNode (scene::Node* root);
            scene::Node* getRootNode ();

            // Updates the view
            void draw ();

        private:
            // GTK Callbacks
            static void onExpose (GtkWidget*, GdkEventExpose*, MapPreview*);
            static void onMouseMotion (GtkWidget*, GdkEventMotion*, MapPreview*);
            static void onMouseScroll (GtkWidget*, GdkEventScroll*, MapPreview*);
    };

} // namespace ui

#endif /* _MAP_PREVIEW_WIDGET_H_ */