Skip to main content
summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat (limited to 'bundles/org.eclipse.compare/plugins/org.eclipse.compare/compare/org/eclipse/compare/internal/ImageCanvas.java')
-rw-r--r--bundles/org.eclipse.compare/plugins/org.eclipse.compare/compare/org/eclipse/compare/internal/ImageCanvas.java136
1 files changed, 0 insertions, 136 deletions
diff --git a/bundles/org.eclipse.compare/plugins/org.eclipse.compare/compare/org/eclipse/compare/internal/ImageCanvas.java b/bundles/org.eclipse.compare/plugins/org.eclipse.compare/compare/org/eclipse/compare/internal/ImageCanvas.java
deleted file mode 100644
index 3a3ec3326..000000000
--- a/bundles/org.eclipse.compare/plugins/org.eclipse.compare/compare/org/eclipse/compare/internal/ImageCanvas.java
+++ /dev/null
@@ -1,136 +0,0 @@
-/*
- * (c) Copyright IBM Corp. 2000, 2001.
- * All Rights Reserved.
- */
-package org.eclipse.compare.internal;
-
-import org.eclipse.swt.*;
-import org.eclipse.swt.graphics.*;
-import org.eclipse.swt.widgets.*;
-
-/**
- * A <code>Canvas</code> showing a single centered SWT <code>Image</code>.
- * If the <code>Image</code> is larger than the <code>Canvas<code>,
- * <code>Scrollbars</code> will appear.
- */
-class ImageCanvas extends Canvas {
-
- private Image fImage;
-
- /**
- * Create a new ImageCanvas with the given SWT stylebits.
- * (SWT.H_SCROLL and SWT.V_SCROLL are automtically added).
- */
- public ImageCanvas(Composite parent, int style) {
- super(parent, style | SWT.H_SCROLL | SWT.V_SCROLL);
-
- ScrollBar sb= getHorizontalBar();
- sb.setIncrement(20);
- sb.addListener(SWT.Selection, new Listener() {
- public void handleEvent(Event e) {
- repaint();
- }
- });
-
- sb= getVerticalBar();
- sb.setIncrement(20);
- sb.addListener(SWT.Selection, new Listener() {
- public void handleEvent(Event e) {
- repaint();
- }
- });
-
- addListener(SWT.Resize, new Listener() {
- public void handleEvent(Event e) {
- updateScrollbars();
- }
- });
-
- addListener(SWT.Paint, new Listener() {
- public void handleEvent(Event event) {
- paint(event.gc);
- }
- });
- }
-
- /**
- * Set the SWT Image to use as the ImageCanvas contents.
- */
- public void setImage(Image img) {
- fImage= img;
-
- if (!isDisposed()) {
- getHorizontalBar().setSelection(0);
- getVerticalBar().setSelection(0);
- updateScrollbars();
- getParent().layout();
- redraw();
- }
- }
-
- public void repaint() {
- if (!isDisposed()) {
- GC gc= new GC(this);
- paint(gc);
- gc.dispose();
- }
- }
-
- /**
- * @private
- */
- private void paint(GC gc) {
- if (fImage != null) {
- Rectangle bounds= fImage.getBounds();
- Rectangle clientArea= getClientArea();
-
- int x;
- if (bounds.width < clientArea.width)
- x= (clientArea.width - bounds.width) / 2;
- else
- x= -getHorizontalBar().getSelection();
-
- int y;
- if (bounds.height < clientArea.height)
- y= (clientArea.height - bounds.height) / 2;
- else
- y= -getVerticalBar().getSelection();
-
- gc.drawImage(fImage, x, y);
- }
- }
-
- /**
- * @private
- */
- private void updateScrollbars() {
- Rectangle bounds= fImage != null ? fImage.getBounds() : new Rectangle(0, 0, 0, 0);
- Point size= getSize();
- Rectangle clientArea= getClientArea();
-
- ScrollBar horizontal= getHorizontalBar();
- if (bounds.width <= clientArea.width) {
- horizontal.setVisible(false);
- horizontal.setSelection(0);
- } else {
- horizontal.setPageIncrement(clientArea.width - horizontal.getIncrement());
- int max= bounds.width + (size.x - clientArea.width);
- horizontal.setMaximum(max);
- horizontal.setThumb(size.x > max ? max : size.x);
- horizontal.setVisible(true);
- }
-
- ScrollBar vertical= getVerticalBar();
- if (bounds.height <= clientArea.height) {
- vertical.setVisible(false);
- vertical.setSelection(0);
- } else {
- vertical.setPageIncrement(clientArea.height - vertical.getIncrement());
- int max= bounds.height + (size.y - clientArea.height);
- vertical.setMaximum(max);
- vertical.setThumb(size.y > max ? max : size.y);
- vertical.setVisible(true);
- }
- }
-
-}

Back to the top