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/*
* Copyright (c) 2008-2011, Piccolo2D project, http://piccolo2d.org
* Copyright (c) 1998-2008, University of Maryland
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided
* that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this list of conditions
* and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice, this list of conditions
* and the following disclaimer in the documentation and/or other materials provided with the
* distribution.
*
* None of the name of the University of Maryland, the name of the Piccolo2D project, or the names of its
* contributors may be used to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.piccolo2d.examples;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import javax.swing.JDialog;
import org.piccolo2d.PCanvas;
import org.piccolo2d.PLayer;
import org.piccolo2d.PNode;
import org.piccolo2d.event.PBasicInputEventHandler;
import org.piccolo2d.event.PDragEventHandler;
import org.piccolo2d.event.PDragSequenceEventHandler;
import org.piccolo2d.event.PInputEvent;
import org.piccolo2d.extras.PFrame;
import org.piccolo2d.extras.nodes.P3DRect;
import org.piccolo2d.nodes.PImage;
import org.piccolo2d.nodes.PPath;
import org.piccolo2d.nodes.PText;
import org.piccolo2d.util.PBounds;
import org.piccolo2d.util.PDimension;
import org.piccolo2d.util.PPaintContext;
/**
* This example, contributed by Rowan Christmas, shows how to create a birds-eye
* view window.
*/
public class BirdsEyeViewExample extends PFrame {
/**
*
*/
private static final long serialVersionUID = 1L;
boolean fIsPressed = false;
public BirdsEyeViewExample() {
this(null);
}
public BirdsEyeViewExample(final PCanvas aCanvas) {
super("BirdsEyeViewExample", false, aCanvas);
}
public void initialize() {
nodeDemo();
createNodeUsingExistingClasses();
subclassExistingClasses();
composeOtherNodes();
createCustomNode();
// Last of all lets remove the default pan event handler, and add a
// drag event handler instead. This way you will be able to drag the
// nodes around with the mouse.
getCanvas().removeInputEventListener(getCanvas().getPanEventHandler());
getCanvas().addInputEventListener(new PDragEventHandler());
// this will create the actual BirdsEyeView and put it in a JDialog
final BirdsEyeView bev = new BirdsEyeView();
bev.connect(getCanvas(), new PLayer[] { getCanvas().getLayer() });
final JDialog bird = new JDialog();
bird.getContentPane().add(bev);
bird.pack();
bird.setSize(150, 150);
bird.setVisible(true);
}
// This method demonstrates the kinds of things that can be done with any
// node.
public void nodeDemo() {
final PLayer layer = getCanvas().getLayer();
final PNode aNode = PPath.createRectangle(0, 0, 100, 80);
// A node needs to be a descendent of the root to be displayed on the
// screen.
layer.addChild(aNode);
// The default color for a node is blue, but you can change that with
// the setPaint method.
aNode.setPaint(Color.red);
// A node can have children nodes added to it.
aNode.addChild(PPath.createRectangle(0, 0, 100, 80));
// The base bounds of a node is easy to change. Note that changing the
// base bounds of a node will not change it's children.
aNode.setBounds(-10, -10, 200, 110);
// Each node has a transform that can be used to transform the node, and
// all its children on the screen.
aNode.translate(100, 100);
aNode.scale(1.5);
aNode.rotate(45);
// The transparency of any node can be set, this transparency will be
// applied to any of the nodes children as well.
aNode.setTransparency(0.75f);
// Its easy to copy nodes.
final PNode aCopy = (PNode) aNode.clone();
// Make is so that the copies children are not pickable. For this
// example that means you will not be able to grab the child and remove
// it from its parent.
aNode.setChildrenPickable(false);
// Change the look of the copy
aNode.setPaint(Color.GREEN);
aNode.setTransparency(1.0f);
// Let's add the copy to the root, and translate it so that it does not
// cover the original node.
layer.addChild(aCopy);
aCopy.setOffset(0, 0);
aCopy.rotate(-45);
}
// So far we have just been using PNode, but of course PNode has many
// subclasses that you can try out to.
public void createNodeUsingExistingClasses() {
final PLayer layer = getCanvas().getLayer();
layer.addChild(PPath.createEllipse(0, 0, 100, 100));
layer.addChild(PPath.createRectangle(0, 100, 100, 100));
layer.addChild(new PText("Hello World"));
// Here we create an image node that displays a thumbnail
// image of the root node. Note that you can easily get a thumbnail
// of any node by using PNode.toImage().
layer.addChild(new PImage(layer.toImage(300, 300, Color.YELLOW)));
}
// Another way to create nodes is to customize other nodes that already
// exist. Here we create an ellipse, except when you press the mouse on
// this ellipse it turns into a square, when you release the mouse it
// goes back to being an ellipse.
public void subclassExistingClasses() {
final PNode n = new PPath.Float(new Ellipse2D.Float(0, 0, 100, 80)) {
private static final long serialVersionUID = 1L;
public void paint(final PPaintContext aPaintContext) {
if (fIsPressed) {
// if mouse is pressed draw self as a square.
final Graphics2D g2 = aPaintContext.getGraphics();
g2.setPaint(getPaint());
g2.fill(getBoundsReference());
}
else {
// if mouse is not pressed draw self normally.
super.paint(aPaintContext);
}
}
};
n.addInputEventListener(new PBasicInputEventHandler() {
public void mousePressed(final PInputEvent aEvent) {
super.mousePressed(aEvent);
fIsPressed = true;
n.invalidatePaint(); // this tells the framework that the node
// needs to be redisplayed.
}
public void mouseReleased(final PInputEvent aEvent) {
super.mousePressed(aEvent);
fIsPressed = false;
n.invalidatePaint(); // this tells the framework that the node
// needs to be redisplayed.
}
});
n.setPaint(Color.ORANGE);
getCanvas().getLayer().addChild(n);
}
// Here a new "face" node is created. But instead of drawing the face
// directly using Graphics2D we compose the face from other nodes.
public void composeOtherNodes() {
final PNode myCompositeFace = PPath.createRectangle(0, 0, 100, 80);
// create parts for the face.
final PNode eye1 = PPath.createEllipse(0, 0, 20, 20);
eye1.setPaint(Color.YELLOW);
final PNode eye2 = (PNode) eye1.clone();
final PNode mouth = PPath.createRectangle(0, 0, 40, 20);
mouth.setPaint(Color.BLACK);
// add the face parts
myCompositeFace.addChild(eye1);
myCompositeFace.addChild(eye2);
myCompositeFace.addChild(mouth);
// don't want anyone grabbing out our eye's.
myCompositeFace.setChildrenPickable(false);
// position the face parts.
eye2.translate(25, 0);
mouth.translate(0, 30);
// set the face bounds so that it neatly contains the face parts.
final PBounds b = myCompositeFace.getUnionOfChildrenBounds(null);
myCompositeFace.setBounds(b.inset(-5, -5));
// opps it to small, so scale it up.
myCompositeFace.scale(1.5);
getCanvas().getLayer().addChild(myCompositeFace);
}
// Here a completely new kind of node, a grid node" is created. We do
// all the drawing ourselves here instead of passing the work off to
// other parts of the framework.
public void createCustomNode() {
final PNode n = new PNode() {
/**
*
*/
private static final long serialVersionUID = 1L;
public void paint(final PPaintContext aPaintContext) {
final double bx = getX();
final double by = getY();
final double rightBorder = bx + getWidth();
final double bottomBorder = by + getHeight();
final Line2D line = new Line2D.Double();
final Graphics2D g2 = aPaintContext.getGraphics();
g2.setStroke(new BasicStroke(0));
g2.setPaint(getPaint());
// draw vertical lines
for (double x = bx; x < rightBorder; x += 5) {
line.setLine(x, by, x, bottomBorder);
g2.draw(line);
}
for (double y = by; y < bottomBorder; y += 5) {
line.setLine(bx, y, rightBorder, y);
g2.draw(line);
}
}
};
n.setBounds(0, 0, 100, 80);
n.setPaint(Color.black);
getCanvas().getLayer().addChild(n);
}
public static void main(final String[] args) {
new BirdsEyeViewExample();
}
/**
* The Birds Eye View Class
*/
public class BirdsEyeView extends PCanvas implements PropertyChangeListener {
/**
*
*/
private static final long serialVersionUID = 1L;
/**
* This is the node that shows the viewed area.
*/
PNode areaVisiblePNode;
/**
* This is the canvas that is being viewed
*/
PCanvas viewedCanvas;
/**
* The change listener to know when to update the birds eye view.
*/
PropertyChangeListener changeListener;
int layerCount;
/**
* Creates a new instance of a BirdsEyeView
*/
public BirdsEyeView() {
// create the PropertyChangeListener for listening to the viewed
// canvas
changeListener = new PropertyChangeListener() {
public void propertyChange(final PropertyChangeEvent evt) {
updateFromViewed();
}
};
// create the coverage node
areaVisiblePNode = new P3DRect();
areaVisiblePNode.setPaint(new Color(128, 128, 255));
areaVisiblePNode.setTransparency(.8f);
areaVisiblePNode.setBounds(0, 0, 100, 100);
getCamera().addChild(areaVisiblePNode);
// add the drag event handler
getCamera().addInputEventListener(new PDragSequenceEventHandler() {
protected void startDrag(final PInputEvent e) {
if (e.getPickedNode() == areaVisiblePNode) {
super.startDrag(e);
}
}
protected void drag(final PInputEvent e) {
final PDimension dim = e.getDelta();
viewedCanvas.getCamera().translateView(0 - dim.getWidth(), 0 - dim.getHeight());
}
});
// remove Pan and Zoom
removeInputEventListener(getPanEventHandler());
removeInputEventListener(getZoomEventHandler());
setDefaultRenderQuality(PPaintContext.LOW_QUALITY_RENDERING);
}
public void connect(final PCanvas canvas, final PLayer[] viewed_layers) {
viewedCanvas = canvas;
layerCount = 0;
viewedCanvas.getCamera().addPropertyChangeListener(changeListener);
for (layerCount = 0; layerCount < viewed_layers.length; ++layerCount) {
getCamera().addLayer(layerCount, viewed_layers[layerCount]);
}
}
/**
* Add a layer to list of viewed layers
*/
public void addLayer(final PLayer new_layer) {
getCamera().addLayer(new_layer);
layerCount++;
}
/**
* Remove the layer from the viewed layers
*/
public void removeLayer(final PLayer old_layer) {
getCamera().removeLayer(old_layer);
layerCount--;
}
/**
* Stop the birds eye view from receiving events from the viewed canvas
* and remove all layers
*/
public void disconnect() {
viewedCanvas.getCamera().removePropertyChangeListener(changeListener);
for (int i = 0; i < getCamera().getLayerCount(); ++i) {
getCamera().removeLayer(i);
}
}
/**
* This method will get called when the viewed canvas changes
*/
public void propertyChange(final PropertyChangeEvent event) {
updateFromViewed();
}
/**
* This method gets the state of the viewed canvas and updates the
* BirdsEyeViewer This can be called from outside code
*/
public void updateFromViewed() {
double viewedX;
double viewedY;
double viewedHeight;
double viewedWidth;
final double ul_camera_x = viewedCanvas.getCamera().getViewBounds().getX();
final double ul_camera_y = viewedCanvas.getCamera().getViewBounds().getY();
final double lr_camera_x = ul_camera_x + viewedCanvas.getCamera().getViewBounds().getWidth();
final double lr_camera_y = ul_camera_y + viewedCanvas.getCamera().getViewBounds().getHeight();
final Rectangle2D drag_bounds = getCamera().getUnionOfLayerFullBounds();
final double ul_layer_x = drag_bounds.getX();
final double ul_layer_y = drag_bounds.getY();
final double lr_layer_x = drag_bounds.getX() + drag_bounds.getWidth();
final double lr_layer_y = drag_bounds.getY() + drag_bounds.getHeight();
// find the upper left corner
// set to the lesser value
if (ul_camera_x < ul_layer_x) {
viewedX = ul_layer_x;
}
else {
viewedX = ul_camera_x;
}
// same for y
if (ul_camera_y < ul_layer_y) {
viewedY = ul_layer_y;
}
else {
viewedY = ul_camera_y;
}
// find the lower right corner
// set to the greater value
if (lr_camera_x < lr_layer_x) {
viewedWidth = lr_camera_x - viewedX;
}
else {
viewedWidth = lr_layer_x - viewedX;
}
// same for height
if (lr_camera_y < lr_layer_y) {
viewedHeight = lr_camera_y - viewedY;
}
else {
viewedHeight = lr_layer_y - viewedY;
}
Rectangle2D bounds = new Rectangle2D.Double(viewedX, viewedY, viewedWidth, viewedHeight);
bounds = getCamera().viewToLocal(bounds);
areaVisiblePNode.setBounds(bounds);
// keep the birds eye view centered
getCamera().animateViewToCenterBounds(drag_bounds, true, 0);
}
} // class BirdsEyeView
}
