@Nullable
public static Range<Integer> getExpandControlRange(final JTree aTree, final TreePath path) {
TreeModel treeModel = aTree.getModel();
final BasicTreeUI basicTreeUI = (BasicTreeUI) aTree.getUI();
Icon expandedIcon = basicTreeUI.getExpandedIcon();
Range<Integer> box = null;
if (path != null && !treeModel.isLeaf(path.getLastPathComponent())) {
int boxWidth;
Insets i = aTree.getInsets();
if (expandedIcon != null) {
boxWidth = expandedIcon.getIconWidth();
} else {
boxWidth = 8;
}
int boxLeftX = i != null ? i.left : 0;
boolean leftToRight = aTree.getComponentOrientation().isLeftToRight();
int depthOffset = getDepthOffset(aTree);
int totalChildIndent = basicTreeUI.getLeftChildIndent() + basicTreeUI.getRightChildIndent();
if (leftToRight) {
boxLeftX +=
((path.getPathCount() + depthOffset - 2) * totalChildIndent
+ basicTreeUI.getLeftChildIndent())
- boxWidth / 2;
}
int boxRightX = boxLeftX + boxWidth;
box = new Range<Integer>(boxLeftX, boxRightX);
}
return box;
}
@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;
}