/**
* Creates a new Command that can bar line shift a melody part.
*
* @param source the Part to paste
* @param startSlot the slot to start pasting over in the dest
* @param stopSlot the slot to end pasting over in the dest
* @param direction the direction ("up" or "down") to transpose the second half
* @param distance the number of half steps to transpose the melody
* @param keySig the key signature that the solo is being played in
* @param cm the command manager used
*/
public SideSlipCommand(
MelodyPart source, String direction, int distance, int keySig, CommandManager cm) {
this.source = source;
this.dest = source.copy();
this.original = source.copy();
this.direction = direction;
this.distance = distance;
this.keySig = keySig;
this.cm = cm;
}
/** applies the transformation to the source MelodyPart */
public void execute() {
Trace.log(2, "executing SideSlipCommand");
int start = original.getSize();
if (direction.equals("up")) { // slide up
cm.execute(new ShiftPitchesCommand(distance, dest, 0, start, 0, 128, keySig));
} else if (direction.equals("down")) { // slide down
cm.execute(new ShiftPitchesCommand(-1 * distance, dest, 0, start, 0, 128, keySig));
}
// add two of the same melodies with one transposed
source.setSize(dest.getSize() * 2);
source.pasteOver(dest, start);
}
/** Redoes the side slip. */
public void redo() {
if (source != null && dest != null) {
dest.pasteOver(source, source.getSize());
}
}
