Updating Screen shot capabilities.

git-svn-id: http://svn.igniterealtime.org/svn/repos/spark/trunk@5394 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/spark/ui/ImageSelectionPanel.java

@@ -0,0 +1,112 @@
+/**
+ * $Revision: $
+ * $Date: $
+ *
+ * Copyright (C) 2006 Jive Software. All rights reserved.
+ *
+ * This software is published under the terms of the GNU Lesser Public License (LGPL),
+ * a copy of which is included in this distribution.
+ */
+
+package org.jivesoftware.spark.ui;
+
+import java.awt.Color;
+import java.awt.Dimension;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.Point;
+import java.awt.Rectangle;
+import java.awt.RenderingHints;
+import java.awt.event.MouseEvent;
+import java.awt.geom.AffineTransform;
+import java.awt.image.BufferedImage;
+
+import javax.swing.JPanel;
+import javax.swing.event.MouseInputAdapter;
+
+/**
+ * Allows for selection of panel images.
+ */
+public class ImageSelectionPanel extends JPanel {
+    BufferedImage image;
+    Rectangle clip;
+
+    public ImageSelectionPanel(BufferedImage image) {
+        this.image = image;
+        clip = new Rectangle();
+        setBackground(Color.black);
+        Selector selector = new Selector(this);
+        addMouseListener(selector);
+        addMouseMotionListener(selector);
+    }
+
+    protected void paintComponent(Graphics g) {
+        super.paintComponent(g);
+        Graphics2D g2 = (Graphics2D)g;
+        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
+            RenderingHints.VALUE_ANTIALIAS_ON);
+        int w = getWidth();
+        int h = getHeight();
+        int imageWidth = image.getWidth();
+        int imageHeight = image.getHeight();
+        int x = (w - imageWidth) / 2;
+        int y = (h - imageHeight) / 2;
+        AffineTransform at = AffineTransform.getTranslateInstance(x, y);
+        g2.drawRenderedImage(image, at);
+        g2.setPaint(Color.LIGHT_GRAY);
+        g2.draw(clip);
+    }
+
+    public void setClipFrame(Point start, Point end) {
+        clip.setFrameFromDiagonal(start, end);
+        repaint();
+    }
+
+    public Dimension getPreferredSize() {
+        return new Dimension(image.getWidth(), image.getHeight());
+    }
+
+    public Rectangle getClip() {
+        return clip;
+    }
+
+}
+
+class Selector extends MouseInputAdapter {
+    ImageSelectionPanel selectionPanel;
+    Point start;
+    boolean dragging
+    ,
+    isClipSet;
+
+    public Selector(ImageSelectionPanel isp) {
+        selectionPanel = isp;
+        dragging = false;
+        isClipSet = false;
+    }
+
+    public void mousePressed(MouseEvent e) {
+        if (isClipSet)             // clear existing clip
+        {
+            selectionPanel.setClipFrame(start, start);
+            isClipSet = false;
+        }
+        else                      // or start new clip
+        {
+            start = e.getPoint();
+            dragging = true;
+            isClipSet = true;
+        }
+    }
+
+    public void mouseReleased(MouseEvent e) {
+        dragging = false;
+    }
+
+    public void mouseDragged(MouseEvent e) {
+        if (dragging)
+            selectionPanel.setClipFrame(start, e.getPoint());
+    }
+
+
+}