HOWTO: Handle a click event on a DAC TreeControl

Question

HOWTO: Handle a click event on a DAC TreeControl
Goal: Handle the event that occurs when a user clicks on a new node of a DAC TreeControl. In this example the handler is simple - it just prints out the current node. You can try this example on the DACTree.jpr project in the 3.2 tutorial, described in the online help under
Tutorials and Sample Applications
-> Tutorials
-> Building Enterprise Applications with Business Components for Java
-> Enhancing the Online Orders Application
-> Creating a DAC Client
The problem: The usual procedure for adding an event to a DAC component does not work: if you select your TreeControl in the designer, then select the Events tab of the property inspector, none of the events listed does what we want.
Solution: Get the underlying JTree and add your listener to it. Although the TreeControl is not a subclass of javax.swing.JTree, it does have an underlying JTree which you can get by calling TreeControl.getTree().
Add the following code to your frame's .java file (Hint: Add any event, from the Events tab of the property inspector, then use the generated code as your template, changing it to match this example):
1. Declare a JTree:
JTree tree = new JTree();2. In jbInit(), add the event listener after the code that sets up your TreeControl:
tree = treeControl1.getTree();
tree.addTreeSelectionListener(new javax.swing.event.TreeSelectionListener() {
public void valueChanged(javax.swing.event.TreeSelectionEvent e) {
tree_valueChanged(e);
});3. Add the event handler method:
void tree_valueChanged(javax.swing.event.TreeSelectionEvent e) {
System.out.println("Current node: " + tree.getLastSelectedPathComponent());
}

Answer 1

could you add a mouselistener to the pane or whatever container the pie chart is drawn on? Then override the mouseClicked method to do whatever you want?
Message was edited by:
petes1234