package demo.view.viewmode;
import y.view.*;
import y.geom.YRectangle;
import demo.view.DemoBase;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.text.View;
import javax.swing.text.html.HTML;
import javax.swing.plaf.basic.BasicHTML;
import java.awt.*;
import java.util.Enumeration;
import java.util.List;
import java.util.ArrayList;
/**
* Demonstrates how to detect a double click on a hyperlink that is part of a HTML label.
*/
public class HyperlinkHitDemo extends DemoBase {
public HyperlinkHitDemo() {
String text = "I
love
yWorks
and
yFiles";
NodeRealizer nr = view.getGraph2D().getDefaultNodeRealizer();
nr.getLabel().setBackgroundColor(Color.ORANGE);
nr.getLabel().setFontSize(16);
nr.setSize(200,200);
nr.setLabelText(text);
}
protected EditMode createEditMode() {
EditMode editMode = new EditMode() {
public void mouseClicked(double x, double y) {
super.mouseClicked(x, y);
if(lastClickEvent.getClickCount() != 2) return;
HitInfo hitInfo = new HitInfo(getGraph2D(),x,y, HitInfo.NLABEL);
NodeLabel nl = hitInfo.getHitNodeLabel();
if(nl != null) {
String text = nl.getText();
if((BasicHTML.isHTMLString(text))) {
JLabel label = new JLabel();
label.setText(nl.getText());
label.setFont(nl.getFont().deriveFont(nl.getFont().getSize2D()*(float)view.getZoom()));
Dimension dim = label.getPreferredSize();
label.setSize(dim.width, dim.height);
YRectangle box = nl.getBox();
int vx = view.toViewCoordX(x);
int vy = view.toViewCoordX(y);
Rectangle bounds = new Rectangle(view.toViewCoordX(box.x),view.toViewCoordY(box.y),label.getWidth(), label.getHeight());
View htmlView = BasicHTML.createHTMLView(label, text);
Document doc = htmlView.getDocument();
Element[] rootElements = doc.getRootElements();
ArrayList hrefElements = new ArrayList();
for(int i = 0; i < rootElements.length; i++) {
traceHREFs(rootElements[i], 0, hrefElements);
}
for(int i = 0; i < hrefElements.size(); i++) {
Element element = (Element) hrefElements.get(i);
Object href = getAttrValue(element.getAttributes(), HTML.Attribute.HREF);
try {
Shape shape = htmlView.modelToView(element.getStartOffset(), Position.Bias.Forward, element.getEndOffset(), Position.Bias.Forward, bounds);
//System.out.println("shape = " + shape + " href=" + href);
if(shape.contains(vx,vy)) {
System.out.println("hit href = " + href);
}
} catch (BadLocationException e) {
e.printStackTrace();
}
}
}
}
}
};
return editMode;
}
void traceHREFs(Element element, int depth, List hrefElements) {
Object href = getAttrValue(element.getAttributes(), HTML.Attribute.HREF);
if(href != null) {
hrefElements.add(element);
}
for(int i = 0; i < element.getElementCount(); i++) {
traceHREFs(element.getElement(i), depth+1, hrefElements);
}
}
/**
* Returns the object in an AttributeSet matching a key
*/
private static Object getAttrValue(AttributeSet attr, HTML.Attribute key) {
Enumeration names = attr.getAttributeNames();
while (names.hasMoreElements()) {
Object nextKey = names.nextElement();
Object nextVal = attr.getAttribute(nextKey);
if (nextVal instanceof AttributeSet) {
Object value = getAttrValue((AttributeSet) nextVal, key);
if (value != null) {
return value;
}
} else if (nextKey == key) {
return nextVal;
}
}
return null;
}
public static void main( String[] args ) {
EventQueue.invokeLater(new Runnable() {
public void run() {
initLnF();
(new HyperlinkHitDemo()).start();
}
});
}
}