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CS2335/lab4/src/netpaint/client/tools/ImageTool.java

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+package netpaint.client.tools;
+
+import java.awt.Point;
+import java.awt.Graphics2D;
+import java.awt.image.BufferedImage;
+
+import netpaint.messaging.ImageMessage;
+import netpaint.client.gui.ClientUI;
+import netpaint.client.Client;
+
+/**
+ * Class ImageTool: The image tool allows you to insert an image into
+ * the graphics panel.
+ *
+ * <PRE>
+ * Revision History:
+ *     v1.0 (Feb. 09, 2004) - Created the ImageTool class
+ * </PRE>
+ *
+ * @author <A HREF="mailto:gtg308i@mail.gatech.edu">Vladimir Urazov</A>
+ * @version Version 1.0, Feb. 09, 2004
+ */
+public class ImageTool extends AbstractTool {
+
+  /**
+   * Creates a new <code>ImageTool</code> instance.
+   */
+  public ImageTool() {
+    super(netpaint.messaging.MessageSettings.DRAW_IMAGE_TYPE);
+
+    incrementClickCount();
+  }
+
+  /**
+   * This function will be called when the user clicks on the graphics
+   * panel.
+   *
+   * @param position a <code>Point</code> value
+   * @exception Exception if an error occurs
+   */
+  public void processClick(final Point position) throws Exception {
+    ImageMessage msg = null;
+
+    if (getClickCount() == 1) {
+      //FIXME: Please
+      clear();
+
+      BufferedImage image = ClientUI.getInstance().getImagePanel().getImage();
+      if (image == null) {
+          //Tell the user to load an image and THEN click!
+ ClientUI.getInstance().showWarning("Warning", "First you should paste the URL"
++ "into the URL text area, then click 'Load',"
++ " and then you may click on the"
++ "panel to select where to insert the image");
+          return;
+      }
+
+      msg = (ImageMessage) getMessage();
+
+      //This is the first click:
+      msg.setXCoord((float) position.getX());
+      msg.setYCoord((float) position.getY());
+
+      incrementClickCount();
+    } else if (getClickCount() == 2) {
+        msg = (ImageMessage) getMessage();
+
+        msg.setWidth((float) (position.getX() - msg.getXCoord()));
+        msg.setHeight((float) (position.getY() - msg.getYCoord()));
+
+        msg.setURL(ClientUI.getInstance().getImagePanel().getImageURL());
+
+        finish();
+    }
+  }
+
+  /**
+   * This will clear any progress the tool has made so far. If the
+   * user has already started drawing the shape, but has not yet
+   * finished, calling this method will discard all the progress made
+   * so far and start from the clean slate.
+   */
+  public synchronized void clear() {
+    resetClickCount();
+    incrementClickCount();
+
+    setMessage(new ImageMessage(Client.getInstance().getUsername()));
+  }
+
+  /**
+   * If the tool is currently being employed and the user has drawn
+   * some of the shape, but hasn't yet finished, then this function
+   * should render the intermediate view of the shape to the
+   * target. If the tool has already finished, or hasn't even started
+   * yet, then it should draw nothing.
+   *
+   * @param target a <code>Graphics2D</code> value
+   */
+  public synchronized void render(final Graphics2D target) {
+    ImageMessage msg = (ImageMessage) getMessage();
+    Point mLocation
+      = ClientUI.getInstance().getGraphicsPanel().getMousePosition();
+
+    if (getClickCount() == 1) {
+        float xCoord = (float) mLocation.getX();
+        float yCoord = (float) mLocation.getY();
+        BufferedImage image
+            = ClientUI.getInstance().getImagePanel().getImage();
+
+        if (image != null) {
+            target.drawImage(image, null, (int) xCoord, (int) yCoord);
+        }
+
+    } else if (getClickCount() == 2) {
+        float xCoord = msg.getXCoord();
+        float yCoord = msg.getYCoord();
+        float width = (float) (mLocation.getX() - xCoord);
+        float height = (float) (mLocation.getY() - yCoord);
+        BufferedImage image
+            = ClientUI.getInstance().getImagePanel().getImage();
+
+        if (image == null) { return; }
+
+        if (width < 1) {
+            width = 1.0f;
+        }
+
+        if (height < 1) {
+            height = 1.0f;
+        }
+
+        //          target.drawImage(bim, null, (int) xCoord, (int) yCoord);
+        target.drawImage(image,
+                         (int) xCoord,
+                         (int) yCoord,
+                         (int) width, (int) height, null);
+    }
+  }
+}
+