1 files changed, 67 insertions, 0 deletions
diff --git a/Src/Wasabi/Lib/com/dragvolume.m b/Src/Wasabi/Lib/com/dragvolume.m
new file mode 100644
index 00000000..8b56d6e4
--- /dev/null
+++ b/Src/Wasabi/Lib/com/dragvolume.m
@@ -0,0 +1,67 @@
+//----------------------------------------------------------------------------------------
+//
+// dragvolume.m
+//
+//----------------------------------------------------------------------------------------
+// Use like this :
+// #define DRAG_VOLUME_VAR MyVar
+// #include "dragvolume.m"
+//
+//
+//                       _MyVarInit(AnimatedLayer l);       // init dragvolume
+//                       _MyVarSetMaxDistance(Int nPixels); // set 100% pixel distance
+//
+
+
+
+Global AnimatedLayer _##DRAG_VOLUME_VAR##AnimLayer;
+Global Int _##DRAG_VOLUME_VAR##Clicked;
+Global Int _##DRAG_VOLUME_VAR##Y;
+Global Int _##DRAG_VOLUME_VAR##V;
+Global Int _##DRAG_VOLUME_VAR##Max;
+
+Function _##DRAG_VOLUME_VAR##Init(AnimatedLayer l);
+Function _##DRAG_VOLUME_VAR##Update(int vol);
+Function _##DRAG_VOLUME_VAR##SetMaxDistance(int pixels);
+Function _##DRAG_VOLUME_VAR##UpdateY(int y);
+
+_##DRAG_VOLUME_VAR##Init(AnimatedLayer l) {
+  _##DRAG_VOLUME_VAR##AnimLayer = l;
+  _##DRAG_VOLUME_VAR##Update(getVolume());
+}
+
+_##DRAG_VOLUME_VAR##AnimLayer.onLeftButtonDown(int x, int y) {
+  _##DRAG_VOLUME_VAR##Clicked = 1;
+  _##DRAG_VOLUME_VAR##Y = y;
+  _##DRAG_VOLUME_VAR##V = getVolume();
+}
+
+_##DRAG_VOLUME_VAR##AnimLayer.onMouseMove(int x, int y) {
+  if (_##DRAG_VOLUME_VAR##Clicked) {
+    _##DRAG_VOLUME_VAR##updateY(y);
+  }
+}
+
+_##DRAG_VOLUME_VAR##AnimLayer.onLeftButtonUp(int x, int y) {
+  _##DRAG_VOLUME_VAR##Clicked = 0;
+}
+
+_##DRAG_VOLUME_VAR##SetMaxDistance(int npix) {
+  _##DRAG_VOLUME_VAR##Max = npix;
+}
+
+_##DRAG_VOLUME_VAR##UpdateY(int y) {
+  float p = (_##DRAG_VOLUME_VAR##Y - y) / _##DRAG_VOLUME_VAR##Max;
+  SetVolume(_##DRAG_VOLUME_VAR##V + p * 255); // range is checked
+}
+
+_##DRAG_VOLUME_VAR##Update(int vol) {
+  float p = vol / 255;
+  _##DRAG_VOLUME_VAR##AnimLayer.gotoFrame(p * (_##DRAG_VOLUME_VAR##AnimLayer.getLength()-1)); 
+}
+
+#ifndef _##DRAG_VOLUME_VAR##NOSYSTEMHOOK
+System.onVolumeChanged(int newvol) {
+  _##DRAG_VOLUME_VAR##Update(newvol);
+}
+#endif