/**
  * Zooms out by making the source rectangle (srcRect) larger and centering it on (x,y). If we
  * can't make it larger, then make the window smaller.
  */
 public void zoomOut(int x, int y) {
   if (magnification <= 0.03125) return;
   double oldMag = magnification;
   double newMag = getLowerZoomLevel(magnification);
   double srcRatio = (double) srcRect.width / srcRect.height;
   double imageRatio = (double) imageWidth / imageHeight;
   double initialMag = imp.getWindow().getInitialMagnification();
   if (Math.abs(srcRatio - imageRatio) > 0.05) {
     double scale = oldMag / newMag;
     int newSrcWidth = (int) Math.round(srcRect.width * scale);
     int newSrcHeight = (int) Math.round(srcRect.height * scale);
     if (newSrcWidth > imageWidth) newSrcWidth = imageWidth;
     if (newSrcHeight > imageHeight) newSrcHeight = imageHeight;
     int newSrcX = srcRect.x - (newSrcWidth - srcRect.width) / 2;
     int newSrcY = srcRect.y - (newSrcHeight - srcRect.height) / 2;
     if (newSrcX < 0) newSrcX = 0;
     if (newSrcY < 0) newSrcY = 0;
     srcRect = new Rectangle(newSrcX, newSrcY, newSrcWidth, newSrcHeight);
     // IJ.log(newMag+" "+srcRect+" "+dstWidth+" "+dstHeight);
     int newDstWidth = (int) (srcRect.width * newMag);
     int newDstHeight = (int) (srcRect.height * newMag);
     setMagnification(newMag);
     setMaxBounds();
     // IJ.log(newDstWidth+" "+dstWidth+" "+newDstHeight+" "+dstHeight);
     if (newDstWidth < dstWidth || newDstHeight < dstHeight) {
       // IJ.log("pack");
       setDrawingSize(newDstWidth, newDstHeight);
       imp.getWindow().pack();
     } else repaint();
     return;
   }
   if (imageWidth * newMag > dstWidth) {
     int w = (int) Math.round(dstWidth / newMag);
     if (w * newMag < dstWidth) w++;
     int h = (int) Math.round(dstHeight / newMag);
     if (h * newMag < dstHeight) h++;
     x = offScreenX(x);
     y = offScreenY(y);
     Rectangle r = new Rectangle(x - w / 2, y - h / 2, w, h);
     if (r.x < 0) r.x = 0;
     if (r.y < 0) r.y = 0;
     if (r.x + w > imageWidth) r.x = imageWidth - w;
     if (r.y + h > imageHeight) r.y = imageHeight - h;
     srcRect = r;
   } else {
     srcRect = new Rectangle(0, 0, imageWidth, imageHeight);
     setDrawingSize((int) (imageWidth * newMag), (int) (imageHeight * newMag));
     // setDrawingSize(dstWidth/2, dstHeight/2);
     imp.getWindow().pack();
   }
   // IJ.write(newMag + " " + srcRect.x+" "+srcRect.y+" "+srcRect.width+" "+srcRect.height+"
   // "+dstWidth + " " + dstHeight);
   setMagnification(newMag);
   // IJ.write(srcRect.x + " " + srcRect.width + " " + dstWidth);
   setMaxBounds();
   repaint();
 }
 /** Implements the Image/Zoom/Original Scale command. */
 public void unzoom() {
   double imag = imp.getWindow().getInitialMagnification();
   if (magnification == imag) return;
   srcRect = new Rectangle(0, 0, imageWidth, imageHeight);
   ImageWindow win = imp.getWindow();
   setDrawingSize((int) (imageWidth * imag), (int) (imageHeight * imag));
   setMagnification(imag);
   setMaxBounds();
   win.pack();
   setMaxBounds();
   repaint();
 }
Exemple #3
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 public StackWindow(ImagePlus imp, ImageCanvas ic) {
   super(imp, ic);
   addScrollbars(imp);
   addMouseWheelListener(this);
   if (sliceSelector == null && this.getClass().getName().indexOf("Image5D") != -1)
     sliceSelector = new Scrollbar(); // prevents Image5D from crashing
   // IJ.log(nChannels+" "+nSlices+" "+nFrames);
   pack();
   ic = imp.getCanvas();
   if (ic != null) ic.setMaxBounds();
   show();
   int previousSlice = imp.getCurrentSlice();
   if (previousSlice > 1 && previousSlice <= imp.getStackSize()) imp.setSlice(previousSlice);
   else imp.setSlice(1);
   thread = new Thread(this, "zSelector");
   thread.start();
 }