Den 15.06.2011 18:35, skrev Greg Brown:
Why might you need to know what type of skin is installed on a component? Maybe
there is another alternative that might address your use case?
My use case is to avoid the problem described in the subject. I don't
want to edit when I double click the branch controls (double clicking
happens when you collapse and expand in rapid succession). I wrote a
utility class that I install on the TreeView like this:
getComponentMouseButtonListeners().add(new DoubleClickTreeAdapter(this) {
public void doubleClicked(TreeNode node) {
editNode(node);
}
});
The doubleClicked() callback is invoked when an actual double click
occured. editNode() opens my editor for the current node, this is _not_
an inline editor, it opens a BoxPane with a Form and some other stuff
inside a TabPane to the right of the TreeView.
The DoubleClickTreeAdapter.java looks like this:
public abstract class DoubleClickTreeAdapter implements
ComponentMouseButtonListener {
private TreeView treeView;
public DoubleClickTreeAdapter(TreeView treeView) {
this.treeView = treeView;
}
public boolean mouseClick(Component component, Mouse.Button button,
int x, int y, int count) {
if (count == 2 && button == Mouse.Button.LEFT) {
Sequence.Tree.Path path = treeView.getNodeAt(y);
if (path != null) {
TreeNode node = (TreeNode)
Sequence.Tree.get(treeView.getTreeData(), path);
if (node instanceof TreeBranch) {
if
(Theme.getTheme().getSkinClass(TreeView.class).isAssignableFrom(TerraTreeViewSkin.class))
{
Integer indent = (Integer)
treeView.getStyles().get("indent");
Integer spacing = (Integer)
treeView.getStyles().get("spacing");
int baseNodeX = path.getLength() * (indent +
spacing);
if (x > baseNodeX)
doubleClicked(node);
} else {
// Add support for other skins here, default to
allow double click anywhere for unknown skins
doubleClicked(node);
}
} else {
doubleClicked(node);
}
}
} else if (count == 1 && treeView.getNodeAt(y) == null)
treeView.clearSelection();
return true;
}
public abstract void doubleClicked(TreeNode node);
}
As you can see, I check that the TreeViewSkin is infact
TerraTreeViewSkin, so that I know I can relay on the indent and spacing
to determine if I clicked on or to the left of a branch control, or on
the actual node icon/text.
I will default to call doubleClicked() if there is a non-standard skin
installed, but I can easily add more checks for different skins.
(I removed the empty mouseDown/mouseUp calls from the code above).
-- Edvin
