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public class MyTreeCellRenderer extends JLabel implements TreeCellRenderer {
private static final long serialVersionUID = 6895620207885494809L;
private static final String ICON_CLOSED_FOLDER = "./imgs/7.png";
private static final String ICON_OPENED_FOLDER = "./imgs/3.png";
private static final int SIDE_BTN = 32;
private static final ImageIcon imgOpenFolder = new ImageIcon(new ImageIcon(ICON_OPENED_FOLDER).getImage().getScaledInstance(SIDE_BTN,
SIDE_BTN, Image.SCALE_SMOOTH));
private static final ImageIcon imgClosedFolder = new ImageIcon(
new ImageIcon(ICON_CLOSED_FOLDER).getImage().getScaledInstance(
SIDE_BTN, SIDE_BTN, Image.SCALE_SMOOTH));
/** Color to use for the background when selected. */
protected Color SelectedBackgroundColor = Color.BLUE;
protected boolean selected;
protected int row;
protected Theme currentTheme;
public Component getTreeCellRendererComponent(JTree tree, Object value,
boolean selected, boolean expanded, boolean leaf, int row,
boolean hasFocus) {
DefaultMutableTreeNode node = null;
String nodeName = "";
node = (DefaultMutableTreeNode) value;
if (node.getUserObject() instanceof Theme) {
currentTheme = (Theme) node.getUserObject();
nodeName = currentTheme.getLabelTheme();
} else {
nodeName = node.getUserObject().toString();
}
setText(nodeName); // set the text
if (expanded || selected) {
setIcon(imgOpenFolder);
} else {
setIcon(imgClosedFolder);
}
if (selected)
setForeground(Color.WHITE);
else
setForeground(Color.BLACK);
/* Update the selected flag for the next paint. */
this.selected = selected;
this.row = row;
this.setToolTipText(nodeName);
// And finally, return the properly configured JLabel.
return this;
}
/**
* paint is subclassed to draw the background correctly. JLabel currently
* does not allow backgrounds other than white, and it will also fill behind
* the icon. Something that isn't desirable.
*/
public void paint(Graphics g) {
Color bColor;
Icon currentI = getIcon();
if (selected)
bColor = SelectedBackgroundColor;
else
bColor = Color.WHITE;
g.setColor(bColor);
if (currentI != null && getText() != null) {
int offset = (currentI.getIconWidth() + getIconTextGap());
g.fillRect(offset, 0, getWidth() - 1 - offset, getHeight() - 1);
} else
g.fillRect(0, 0, getWidth() - 1, getHeight() - 1);
super.paint(g);
}
public Color getSelectedBackgroundColor() {
return this.SelectedBackgroundColor;
}
public void setSelectedBackgroundColor(Color selectedBackgroundColor) {
SelectedBackgroundColor = selectedBackgroundColor;
}
public int getRow() {
return row;
}
/**
* This method is overriden from JLabel to create and return the
* ImageToolTip,
*/
@Override
public JToolTip createToolTip() {
// create the ImageToolTip by passing the
// image to appear on it
if (currentTheme != null)
return new ImageToolTip(currentTheme.getGenericPictoTheme()
.getImage());
// should never get here
return null;
}
/**
* This class extends JToolTip and set the UI to ImageToolTipUI.
*
* @author Rahul Sapkal(rahul@javareference.com)
*/
public class ImageToolTip extends JToolTip {
/**
*
*/
private static final long serialVersionUID = 6453234229568220331L;
public ImageToolTip(Image image) {
setUI(new ImageToolTipUI(image));
}
}
/**
* This class extends MetalToolTipUI and provides customizes it to draw a
* given image on it.
*
* @author Rahul Sapkal(rahul@javareference.com)
*/
public class ImageToolTipUI extends MetalToolTipUI {
private Image m_image;
public ImageToolTipUI(Image image) {
m_image = image;
}
/**
* This method is overriden from the MetalToolTipUI to draw the given
* image and text
*/
@Override
public void paint(Graphics g, JComponent c) {
FontMetrics metrics = c.getFontMetrics(g.getFont());
// Dimension size = c.getSize();
// g.setColor(c.getBackground());
// g.fillRect(0, 0, size.width, size.height);
g.setColor(Tools.string2Color(currentTheme.getColorTheme()));
g.drawString(((JToolTip) c).getTipText(), 3, 15);
g.drawImage(m_image, 3, metrics.getHeight() + 3, c);
}
/**
* This method is overriden from the MetalToolTipUI to return the
* appropiate preferred size to size the ToolTip to show both the text
* and image.
*/
@Override
public Dimension getPreferredSize(JComponent c) {
FontMetrics metrics = c.getFontMetrics(c.getFont());
String tipText = ((JToolTip) c).getTipText();
if (tipText == null) {
tipText = "";
}
int width = SwingUtilities.computeStringWidth(metrics, tipText);
int height = metrics.getHeight() + m_image.getHeight(c) + 6;
if (width < m_image.getWidth(c)) {
width = m_image.getWidth(c);
}
return new Dimension(width, height);
}
}
} |
