Method previousSlice

ij/src/main/java/ij/plugin/Animator.java:303–330

()

	}	
	
	void previousSlice() {
		boolean hyperstack = imp.isDisplayedHyperStack();
		int channels = imp.getNChannels();
		int slices = imp.getNSlices();
		int frames = imp.getNFrames();
		if (hyperstack && channels>1 && !((slices>1||frames>1)&&(IJ.controlKeyDown()||IJ.spaceBarDown()||IJ.altKeyDown()))) {
			int c = imp.getChannel() - 1;
			if (c<1) c = 1;
			swin.setPosition(c, imp.getSlice(), imp.getFrame());
		} else if (hyperstack && slices>1 && !(frames>1&&IJ.altKeyDown())) {
			int z = imp.getSlice() - 1;
			if (z<1) z = 1;
			swin.setPosition(imp.getChannel(), z, imp.getFrame());
		} else if (hyperstack && frames>1) {
			int t = imp.getFrame() - 1;
			if (t<1) t = 1;
			swin.setPosition(imp.getChannel(), imp.getSlice(), t);
		} else {
			if (IJ.altKeyDown())
				slice -= 10;
			else
				slice--;
			if (slice<1)
				slice = 1;
			swin.showSlice(slice);
		}
		imp.updateStatusbarValue();
	}

	void changeSlice(int pn) {
		boolean hyperstack = imp.isDisplayedHyperStack();