Method isHandle

ij/src/main/java/ij/gui/Roi.java:1591–1616

Returns a handle number if the specified screen coordinates are inside or near a handle, otherwise returns -1.

(int sx, int sy)

	/** Returns a handle number if the specified screen coordinates are
		inside or near a handle, otherwise returns -1. */
	public int isHandle(int sx, int sy) {
		if (clipboard!=null || ic==null) return -1;
		double mag = ic.getMagnification();
		int margin = IJ.getScreenSize().width>1280?5:3;
		int size = getHandleSize()+margin;
		int halfSize = size/2;
		double x = getXBase();
		double y = getYBase();
		double width = getFloatWidth();
		double height = getFloatHeight();
		int sx1 = screenXD(x) - halfSize;
		int sy1 = screenYD(y) - halfSize;
		int sx3 = screenXD(x+width) - halfSize;
		int sy3 = screenYD(y+height) - halfSize;
		int sx2 = sx1 + (sx3 - sx1)/2;
		int sy2 = sy1 + (sy3 - sy1)/2;
		if (sx>=sx1&&sx<=sx1+size&&sy>=sy1&&sy<=sy1+size) return 0;
		if (sx>=sx2&&sx<=sx2+size&&sy>=sy1&&sy<=sy1+size) return 1;
		if (sx>=sx3&&sx<=sx3+size&&sy>=sy1&&sy<=sy1+size) return 2;
		if (sx>=sx3&&sx<=sx3+size&&sy>=sy2&&sy<=sy2+size) return 3;
		if (sx>=sx3&&sx<=sx3+size&&sy>=sy3&&sy<=sy3+size) return 4;
		if (sx>=sx2&&sx<=sx2+size&&sy>=sy3&&sy<=sy3+size) return 5;
		if (sx>=sx1&&sx<=sx1+size&&sy>=sy3&&sy<=sy3+size) return 6;
		if (sx>=sx1&&sx<=sx1+size&&sy>=sy2&&sy<=sy2+size) return 7;
		return -1;
	}

	protected void mouseDownInHandle(int handle, int sx, int sy) {
		state = MOVING_HANDLE;