big progress on graph editor

ui/graphview.h

@@ -3,11 +3,41 @@
 
 #include <QWidget>
 
+class EffectRow;
+
+QColor get_curve_color(int index, int length);
+
 class GraphView : public QWidget {
+	Q_OBJECT
 public:
     GraphView(QWidget* parent = 0);
 
     void paintEvent(QPaintEvent *event);
+	void mousePressEvent(QMouseEvent *event);
+	void mouseMoveEvent(QMouseEvent *event);
+	void mouseReleaseEvent(QMouseEvent *event);
+	void wheelEvent(QWheelEvent *event);
+
+	void set_row(EffectRow* r);
+signals:
+	void x_scroll_changed(int);
+	void y_scroll_changed(int);
+	void zoom_changed(double);
+private:
+	int x_scroll;
+	int y_scroll;
+	bool mousedown;
+	int start_x;
+	int start_y;
+	double zoom;
+
+	void set_scroll_x(int s);
+	void set_scroll_y(int s);
+
+	int get_screen_x(double);
+	int get_screen_y(double);
+
+	EffectRow* row;
 };
 
 #endif // GRAPHVIEW_H