public static Image createImage(final JTree tree) {
final TreeSelectionModel model = tree.getSelectionModel();
final TreePath[] paths = model.getSelectionPaths();
int count = 0;
final List<ChangesBrowserNode> nodes = new ArrayList<ChangesBrowserNode>();
for (final TreePath path : paths) {
final ChangesBrowserNode node = (ChangesBrowserNode) path.getLastPathComponent();
if (!node.isLeaf()) {
nodes.add(node);
count += node.getCount();
}
}
for (TreePath path : paths) {
final ChangesBrowserNode element = (ChangesBrowserNode) path.getLastPathComponent();
boolean child = false;
for (final ChangesBrowserNode node : nodes) {
if (node.isNodeChild(element)) {
child = true;
break;
}
}
if (!child) {
if (element.isLeaf()) count++;
} else if (!element.isLeaf()) {
count -= element.getCount();
}
}
final JLabel label = new JLabel(VcsBundle.message("changes.view.dnd.label", count));
label.setOpaque(true);
label.setForeground(tree.getForeground());
label.setBackground(tree.getBackground());
label.setFont(tree.getFont());
label.setSize(label.getPreferredSize());
final BufferedImage image =
new BufferedImage(label.getWidth(), label.getHeight(), BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = (Graphics2D) image.getGraphics();
g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.7f));
label.paint(g2);
g2.dispose();
return image;
}
@Override
public final Component getTreeCellRendererComponent(
JTree tree,
Object value,
boolean selected,
boolean expanded,
boolean leaf,
int row,
boolean hasFocus) {
myTree = tree;
clear();
mySelected = selected;
myFocusedCalculated = false;
// We paint background if and only if tree path is selected and tree has focus.
// If path is selected and tree is not focused then we just paint focused border.
if (UIUtil.isFullRowSelectionLAF()) {
setBackground(selected ? UIUtil.getTreeSelectionBackground() : null);
} else if (WideSelectionTreeUI.isWideSelection(tree)) {
setPaintFocusBorder(false);
if (selected) {
setBackground(
hasFocus
? UIUtil.getTreeSelectionBackground()
: UIUtil.getTreeUnfocusedSelectionBackground());
}
} else if (selected) {
setPaintFocusBorder(true);
if (isFocused()) {
setBackground(UIUtil.getTreeSelectionBackground());
} else {
setBackground(null);
}
} else {
setBackground(null);
}
if (value instanceof LoadingNode) {
setForeground(JBColor.GRAY);
setIcon(LOADING_NODE_ICON);
} else {
setForeground(tree.getForeground());
setIcon(null);
}
if (UIUtil.isUnderGTKLookAndFeel()) {
super.setOpaque(false); // avoid nasty background
super.setIconOpaque(false);
} else if (UIUtil.isUnderNimbusLookAndFeel() && selected && hasFocus) {
super.setOpaque(false); // avoid erasing Nimbus focus frame
super.setIconOpaque(false);
} else if (WideSelectionTreeUI.isWideSelection(tree)) {
super.setOpaque(false); // avoid erasing Nimbus focus frame
super.setIconOpaque(false);
} else {
super.setOpaque(
myOpaque
|| selected && hasFocus
|| selected && isFocused()); // draw selection background even for non-opaque tree
}
if (tree.getUI() instanceof WideSelectionTreeUI && UIUtil.isUnderAquaBasedLookAndFeel()) {
setMyBorder(null);
setIpad(new Insets(0, 2, 0, 2));
}
customizeCellRenderer(tree, value, selected, expanded, leaf, row, hasFocus);
return this;
}