OnClientExpanding
The OnClientExpanding client-side event handler is called when a pane is about to be expanded. The expansion can occur because of a user action such as clicking an expand button or sliding zone tab, on page load, or as the result of a a call to a client-side method.
The OnClientExpanding event is supported by RadPane and RadSlidingPane . It takes the place of the deprecated OnClientBeforeExpand event.
The following two parameters are passed to the event handler:
- sender is the pane that is about to be expanded.
-
eventArgs has the following methods:
- set_cancel() lets you prevent the pane from being expanded.
- get_cancel() returns whether the operation was cancelled.
The following example uses the OnClientExpanding event to show a confirmation dialog:
<script type="text/javascript">
function confirmExpand(sender, eventArgs)
{
eventArgs.set_cancel(!confirm("Are you sure you want to open " + sender.get_id() + "?"));
}
</script>
<telerik:RadSplitter RenderMode="Lightweight" runat="server" id="RadSplitter1" Orientation="Horizontal" >
<telerik:RadPane
runat="server"
id="RadPane1"
Height="80px"
OnClientBeforeExpand="confirmExpand" >
<telerik:RadSlidingZone runat="server" id="RadSlidingZone1" >
<telerik:RadSlidingPane
runat="server"
Title="Sliding Pane 1"
id="SlidingPane1"
Height="50px"
OnClientBeforeExpand="confirmExpand" >
</telerik:RadSlidingPane>
<telerik:RadSlidingPane
runat="server"
Title="Sliding Pane 2"
id="SlidingPane2"
Height="50px"
OnClientBeforeExpand="confirmExpand" >
</telerik:RadSlidingPane>
</telerik:RadSlidingZone>
</telerik:RadPane>
<telerik:RadSplitBar runat="server" id="RadSplitBar1" CollapseMode="Both" />
<telerik:RadPane
runat="server"
id="RadPane2"
Height="90px"
OnClientBeforeExpand="confirmExpand" >
</telerik:RadPane>
</telerik:RadSplitter>