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dragvolume.m
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2002-05-30
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//----------------------------------------------------------------------------------------
//
// 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