Hi
I am trying to create a tree which will show list of developers
from database on screen. It worked fine in hosted mode but when i
deploy the application it gives 'firstChild is null or not an object'
exception.
Then i try to do the same with some dummy data and only tree panel
on page but still i got the same error.
I am giving here the code which troubled me, please help me to
solve this out.
public class Test
{
//Outer scope panel to be accessed from outside
Panel searchProjectPanel = new Panel();
//Tree Panel
TreePanel devPanel = new TreePanel();
TreeNode root;
public Test()
{
try
{
devPanel.setHeight(100);
devPanel.setWidth(230);
devPanel.setAutoScroll(true);
devPanel.setRootVisible(true);
//Append a dummy child for the first time
Window.alert("Some Dummy Nodes");
TreeNode dummy1 = new TreeNode("Dummy Child");
TreeNode dummy2 = new TreeNode("Dummy Child");
root = new TreeNode("<b>Developers<b>");
root.appendChild(dummy1);
root.appendChild(dummy2);
root.expand();
Window.alert("Some Dummy Nodes Added to Root");
devPanel.setRootNode(root);
Window.alert("Root Addedd to Panel");
searchProjectPanel.add(devPanel);
}
catch(Exception e)
{
Window.alert("Exception in Test : " + e.getMessage());
}
}
}
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