1 files changed, 115 insertions, 0 deletions
diff --git a/src/gui/elems/ge_envelopeChannel.h b/src/gui/elems/ge_envelopeChannel.h
new file mode 100644
index 0000000..0bb7039
--- /dev/null
+++ b/src/gui/elems/ge_envelopeChannel.h
@@ -0,0 +1,115 @@
+/* ---------------------------------------------------------------------
+ *
+ * Giada - Your Hardcore Loopmachine
+ *
+ * ge_envelopeWidget
+ *
+ * parent class of any envelope controller, from volume to VST parameter
+ * automations.
+ *
+ * ---------------------------------------------------------------------
+ *
+ * Copyright (C) 2010-2015 Giovanni A. Zuliani | Monocasual
+ *
+ * This file is part of Giada - Your Hardcore Loopmachine.
+ *
+ * Giada - Your Hardcore Loopmachine is free software: you can
+ * redistribute it and/or modify it under the terms of the GNU General
+ * Public License as published by the Free Software Foundation, either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * Giada - Your Hardcore Loopmachine is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Giada - Your Hardcore Loopmachine. If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * ------------------------------------------------------------------ */
+
+#ifndef __GE_ENVELOPECHANNEL_H__
+#define __GE_ENVELOPECHANNEL_H__
+
+#include <FL/Fl.H>
+#include <FL/Fl_Group.H>
+#include "../../utils/utils.h"
+#include "ge_actionWidget.h"
+
+
+class gEnvelopeChannel : public gActionWidget {
+
+	const char *l;      // internal label
+	int         type;   // type of action
+	int         range;
+
+	/* point
+	 * a single dot in the graph. x = relative frame, y = relative value */
+
+	struct point {
+		int   frame;
+		int   iValue;
+		float fValue;
+		int   x;
+		int   y;
+	};
+
+	/* points
+	 * array of points, filled by fillPoints() */
+
+	gVector<point> points;
+
+	/* selectedPoint
+	 * which point we are selecting? */
+
+	int selectedPoint;
+
+	/* draggedPoint
+	 * which point we are dragging? */
+
+	int draggedPoint;
+
+	/* previousXPoint
+	 * x coordinate of point at time t-1. Used to check effective shifts */
+
+	int previousXPoint;
+
+	void draw();
+
+	int handle(int e);
+
+	int getSelectedPoint();
+
+	void sortPoints();
+
+	/* verticalPoint
+	 * check if two points form a vertical line. In that case the frame value
+	 * would be the same and recorder would go crazy, so shift by a small value
+	 * of frames to create a minimal fadein/fadeout level. Return 0: no
+	 * vertical points; return 1: vertical with the next one, return -1: vertical
+	 * with the previous one. */
+
+	int verticalPoint(const point &p);
+
+public:
+	gEnvelopeChannel(int x, int y, gdActionEditor *pParent, int type, int range, const char *l);
+	~gEnvelopeChannel();
+
+	/* addPoint
+	 * add a point made of frame+value to internal points[]. */
+
+	void addPoint(int frame, int iValue=0, float fValue=0.0f, int x=-1, int y=-1);
+
+	void updateActions();
+
+	/* fill
+	 * parse recorder's stack and fill the widget with points. It's up to
+	 * the caller to call this method as initialization. */
+
+	void fill();
+
+	inline void clearPoints() { points.clear(); }
+};
+
+#endif