ij.gui.ImageCanvas Java Examples

private void createListeners() {
    //IJ.log("createListeners");
    if(srcImp == null) {
        return;
    }
    ImageCanvas canvas = srcImp.getCanvas();
    if(canvas == null) {
        return;
    }
    canvas.addMouseListener(this);
    canvas.addMouseMotionListener(this);
    canvas.addKeyListener(this);
    ImagePlus.addImageListener(this);
    Font font = live.getFont();
    live.setFont(new Font(font.getName(), Font.BOLD, font.getSize()));
    live.setForeground(Color.red);
}
 

/** Enable zooming out up to the point where the display becomes 10 pixels in width or height. */
protected double getLowerZoomLevel2(final double currentMag) {
	// if it is 1/72 or lower, then:
	if (Math.abs(currentMag - 1/72.0) < 0.00000001 || currentMag < 1/72.0) { // lowest zoomLevel in ImageCanvas is 1/72.0
		// find nearest power of two under currentMag
		// start at level 7, which is 1/128
		int level = 7;
		double scale = currentMag;
		while (scale * srcRect.width > MIN_DIMENSION && scale * srcRect.height > MIN_DIMENSION) {
			scale = 1 / Math.pow(2, level);
			// if not equal and actually smaller, break:
			if (Math.abs(scale - currentMag) != 0.00000001 && scale < currentMag) break;
			level++;
		}
		return scale;
	} else {
		return ImageCanvas.getLowerZoomLevel(currentMag);
	}
}
 

protected double getHigherZoomLevel2(final double currentMag) {
	// if it is not 1/72 and its lower, then:
	if (Math.abs(currentMag - 1/72.0) > 0.00000001 && currentMag < 1/72.0) { // lowest zoomLevel in ImageCanvas is 1/72.0
		// find nearest power of two above currentMag
		// start at level 14, which is 0.00006103515625 (0.006 %)
		int level = 14; // this value may be increased in the future
		double scale = currentMag;
		while (level >= 0) {
			scale = 1 / Math.pow(2, level);
			if (scale > currentMag) break;
			level--;
		}
		return scale;
	} else {
		return ImageCanvas.getHigherZoomLevel(currentMag);
	}
}
 

private void removeListeners() {
    //IJ.log("removeListeners");
    if(srcImp == null) {
        return;
    }
    ImageCanvas canvas = srcImp.getCanvas();
    canvas.removeMouseListener(this);
    canvas.removeMouseMotionListener(this);
    canvas.removeKeyListener(this);
    ImagePlus.removeImageListener(this);
    Font font = live.getFont();
    live.setFont(new Font(font.getName(), Font.PLAIN, font.getSize()));
    live.setForeground(Color.black);
}
 

public FakeImageWindow(ImagePlus imp, ImageCanvas ic, Display display) {
	super(imp.getTitle());
	this.display = display;
	ij = IJ.getInstance();
	this.imp = imp;
	this.ic = ic;
	imp.setWindow(this);
	WindowManager.addWindow(this);
}
 

/**
 * Functional method of the RoiPicker. Determines which Rois match the x,y
 * coordinates of the received MouseEvent and the C,Z,T coordinates of the
 * active image. The user can cycle through these Rois with repeated clicks.
 */
@Override
public void mouseReleased(MouseEvent e) {
	ImageCanvas source = (ImageCanvas) e.getSource();
	if (source != canvas) {
		// We changed image window. Update fields accordingly
		ImageWindow window = (ImageWindow) source.getParent();
		imp = window.getImagePlus();
		canvas = source;
	}
	// Convert global coords to local
	double x = canvas.offScreenXD(e.getX());
	double y = canvas.offScreenYD(e.getY());
	// Get the RoiManager
	RoiManager rm = RoiManager.getInstance();
	if (rm == null) return;

	Roi[] rois = rm.getRoisAsArray();
	// Get the active ImagePlus's current z,c,t coords
	int[] position = imp.convertIndexToPosition(imp.getCurrentSlice());

	Set<Integer> matchedSet = new HashSet<Integer>();
	List<Integer> matchedIndices = new ArrayList<Integer>();

	// generate list of all rois containing x,y and matching the ImagePlus's
	// position
	for (int i = 0; i < rois.length; i++) {
		Roi r = rois[i];
		// Check position
		if (containsPoint(r, position, x, y)) {
			// Matched. Add to the matched set and list
			Integer index = i;
			matchedSet.add(index);
			matchedIndices.add(index);
		}
	}

	// If we discovered the currently known roi set, display the next roi in
	// the series
	if (same(roiSet, matchedSet)) {
		incrementIndex();
	}
	else {
		// otherwise, update the cached indices and display the union of the rois
		roiSet = matchedSet;
		roiIndices = matchedIndices;
		roiIndex = roiIndices.size();
	}

	// Perform the roi selection
	if (matchedIndices.size() > 0) selectRois(rm);
}