Hello!
By default, it's not possible. However, we can add this functionality using the overriding:
Ext.override(Ext.tree.View, {
onCheckboxChange: function (e, t) {
var me = this,
item = e.getTarget(me.getItemSelector(), me.getTargetEl());
if (me.beforeCheckboxChange != undefined && me.beforeCheckboxChange(item) == false)
return;
if (item) {
me.onCheckChange(me.getRecord(item));
}
}
});
Full sample:
<%@ Page Language="C#" %>
<%@ Register Assembly="Ext.Net" Namespace="Ext.Net" TagPrefix="ext" %>
<!DOCTYPE html>
<html>
<head id="Head1" runat="server">
</head>
<body>
<form id="Form1" runat="server">
<ext:ResourceManager ID="ResourceManager1" runat="server" />
<script>
Ext.override(Ext.tree.View, {
onCheckboxChange: function (e, t) {
var me = this,
item = e.getTarget(me.getItemSelector(), me.getTargetEl());
if (me.beforeCheckboxChange != undefined && me.beforeCheckboxChange(item) == false)
return;
if (item) {
me.onCheckChange(me.getRecord(item));
}
}
});
var myBeforeCheckboxChange = function (item) {
if (this.getRecord(item).data.text == "Clean house")
return false;
else
return true;
}
</script>
<ext:TreePanel
ID="TreePanel1"
runat="server"
Title="My Task List"
Icon="Accept"
Height="400"
Width="250"
UseArrows="true"
AutoScroll="true"
Animate="true"
RootVisible="false">
<Listeners>
<BeforeSelect Handler="return false;" />
</Listeners>
<Root>
<ext:Node>
<Children>
<ext:Node Text="To Do" Icon="Folder">
<Children>
<ext:Node Text="Go jogging" Leaf="true" Checked="False" />
<ext:Node Text="Take a nap" Leaf="true" Checked="False" />
<ext:Node Text="Clean house" Leaf="true" Checked="False">
</ext:Node>
</Children>
</ext:Node>
<ext:Node Text="Grocery List" Icon="Folder">
<Children>
<ext:Node Text="Bananas" Leaf="true" Checked="False" />
<ext:Node Text="Milk" Leaf="true" Checked="False" />
<ext:Node Text="Cereal" Leaf="true" Checked="False" />
<ext:Node Text="Energy foods" Icon="Folder">
<Children>
<ext:Node Text="Coffee" Leaf="true" Checked="False" />
<ext:Node Text="Red Bull" Leaf="true" Checked="False" />
</Children>
</ext:Node>
</Children>
</ext:Node>
<ext:Node Text="Kitchen Remodel" Icon="Folder">
<Children>
<ext:Node Text="Finish the budget" Leaf="true" />
<ext:Node Text="Call contractors" Leaf="true" Checked="False" />
<ext:Node Text="Choose design" Leaf="true" Checked="False" />
</Children>
</ext:Node>
</Children>
</ext:Node>
</Root>
<Listeners>
<BeforeItemClick Handler="return false" />
<Render Handler="this.getRootNode().expand(true);" Delay="50" />
</Listeners>
<View>
<ext:TreeView runat="server">
<CustomConfig>
<ext:ConfigItem Name="beforeCheckboxChange" Value="myBeforeCheckboxChange" Mode="Raw" />
</CustomConfig>
</ext:TreeView>
</View>
</ext:TreePanel>
</form>
</body>
</html>
Originally Posted by Baidaly
