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Version Q2 2011 released 07/12/2011
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Splitter / Client-side Events

Collapse/Resize the vertical splitter to see how the client-side events are raised.
Top Pane
Bottom Pane
Right Pane
Clear log Event log:

  • Client-Side Events

    RadSplitter client-side events:
    • OnClientLoad - raised when the initialization of the RadSplitter is complete.
    • OnClientResizing - raised before the RadSplitter resizes.
    • OnClientResized - raised when the RadSplitter resizes.
    RadPane client-side events:
    • OnClientCollapsing - raised before the RadPane is collapsed.
    • OnClientCollapsed - raised when the RadPane is collapsed.
    • OnClientExpanding- raised before the RadPane is expanded.
    • OnClientExpanded - raised when the RadPane is expanded.
    • OnClientResizing - raised before the RadPane is resized.
    • OnClientResized - raised when the RadPane is resized.

    All client side events take two parameters - sender and arguments:
            function OnClientLoad(sender, args) 
            {
                //sender represents the splitter that has fired the event
            //the code below obtains the id of the splitter that has fired the event
            var id = sender.get_id();
             }

    All events that end in "ing" (i.e. OnClientResizing)" can be cancelled. To do this you should call the set_cancel(true) method in the event handler: 

             function OnClientResizing(sender, args)
             {                            
	    set_cancel(true);                  
         }
    Once, the OnClientResizing event is cancelled, the splitter/pane cannot change its width and height.

Source Code

C# VB.NET
Show code in new window Demo isolation steps
  • <%@ Page Language="vb" CodeFile="DefaultVB.aspx.vb" AutoEventWireup="false" Inherits="Telerik.Web.Examples.Splitter.ClientSideEvents.DefaultVB" %>

    <%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
    <%@ Register TagPrefix="qsf" Namespace="Telerik.QuickStart" %>
    <%@ Register TagPrefix="qsf" TagName="Header" Src="~/Common/Header.ascx" %>
    <%@ Register TagPrefix="qsf" TagName="HeadTag" Src="~/Common/HeadTag.ascx" %>
    <%@ Register TagPrefix="qsf" TagName="Footer" Src="~/Common/Footer.ascx" %>
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head runat="server">
        <qsf:HeadTag ID="Headtag1" runat="server"></qsf:HeadTag>
    </head>
    <body class="BODY">
        <form id="Form1" method="post" runat="server">
        <qsf:Header ID="Header1" runat="server" NavigationLanguage="VB">
        </qsf:Header>
        <telerik:RadScriptManager ID="RadScriptManager1" runat="server"></telerik:RadScriptManager>

        <script type="text/javascript">
            /* RadSplitter events */
            function SplitterLoad(sender,args)
            {
                window.setTimeout(function(){
                    logEvent("Splitter with ID=" + sender.get_id() + " is loaded.");
                }, 0);
            }

            function SplitterResizing(sender,args)
            {
                var id = sender.get_id();
                var logMessage = "";

                var width = sender.get_width();
                var newWidth = args.get_newWidth();
                if(width != newWidth)
                    logMessage += "Changing width of splitter with ID=" + id + " from " + width + "px to " + newWidth + "px.";

                var height = sender.get_height();
                var newHeight = args.get_newHeight();
                if(height != newHeight)
                    logMessage += "Changing height of splitter with ID=" + id + " from " + height + "px to " + newHeight + "px.";

                if("" != logMessage)
                {
                    window.setTimeout(function(){
                        logEvent(logMessage);
                    }, 0);
                }
            }

            function SplitterResized(sender,args)
            {
                var id = sender.get_id();
                var logMessage = "";

                var oldWidth = args.get_oldWidth();
                var width = sender.get_width();
                if(oldWidth != width)
                    logMessage += "Changed width of splitter with ID=" + id + " from " + oldWidth + "px to " + width + "px.";

                var oldHeight = args.get_oldHeight();
                var height = sender.get_height();
                if(oldHeight != height)
                    logMessage += "Changed height of splitter with ID=" + id + " from " + oldHeight + "px to " + height + "px.";

                if("" != logMessage)
                {
                    window.setTimeout(function(){
                        logEvent(logMessage);
                    }, 0);
                }
            }

            /* RadPane events */
            function PaneCollapsing(sender,args)
            {
                window.setTimeout(function(){
                    logEvent("Collapsing pane with ID=" + sender.get_id() + ".");
                }, 0);
            }

            function PaneCollapsed(sender,args)
            {
                window.setTimeout(function(){
                    logEvent("Collapsed pane with ID=" + sender.get_id() + ".");
                }, 0);
            }

            function PaneExpanding(sender,args)
            {
                window.setTimeout(function(){
                    logEvent("Expanding pane with ID=" + sender.get_id() + ".");
                }, 0);
            }

            function PaneExpanded(sender,args)
            {
                window.setTimeout(function(){
                    logEvent("Expanded pane with ID=" + sender.get_id() + ".");
                }, 0);
            }

            function PaneResizing(sender,args)
            {
                var resizeDirection = (args.get_resizeDirection() == Telerik.Web.UI.SplitterDirection.Forward ? "forward" : "backward");
                window.setTimeout(function(){
                    logEvent("Resizing " + resizeDirection + " pane with ID=" + sender.get_id() + " with " + args.get_delta() + "px.");
                }, 0);
            }

            function PaneResized(sender,args)
            {
                var id = sender.get_id();
                var logMessage = "";

                var oldWidth = args.get_oldWidth();
                var width = sender.get_width();
                if(oldWidth != width)
                    logMessage += "Changed width of pane with ID=" + id + " from " + oldWidth + "px to " + width + "px.";

                var oldHeight = args.get_oldHeight();
                var height = sender.get_height();
                if(oldHeight != height)
                    logMessage += "Changed height of pane with ID=" + id + " from " + oldHeight + "px to " + height + "px.";

                window.setTimeout(function(){
                    logEvent(logMessage);
                }, 0);
            }
        </script>

        <div class="bigModule" style="margin-bottom: 40px">
            <div class="bigModuleBottom">
                Collapse/Resize the vertical splitter to see how the client-side events are raised.<br />
            </div>
        </div>
        <telerik:RadSplitter ID="OuterSplitter" runat="server" Height="200" Width="750" OnClientLoad="SplitterLoad">
            <telerik:RadPane ID="MainPane" runat="server" Width="300" Scrolling="None" OnClientCollapsing="PaneCollapsing"
                OnClientCollapsed="PaneCollapsed" OnClientResizing="PaneResizing" OnClientExpanding="PaneExpanding"
                OnClientExpanded="PaneExpanded" OnClientResized="PaneResized">
                <telerik:RadSplitter ID="NestedSplitter" runat="server" Orientation="Horizontal"
                    OnClientLoad="SplitterLoad" OnClientResizing="SplitterResizing" OnClientResized="SplitterResized">
                    <telerik:RadPane ID="TopPane" runat="server" OnClientCollapsing="PaneCollapsing"
                        OnClientCollapsed="PaneCollapsed" OnClientResizing="PaneResizing" OnClientExpanding="PaneExpanding"
                        OnClientExpanded="PaneExpanded" OnClientResized="PaneResized">
                        Top Pane
                    </telerik:RadPane>
                    <telerik:RadSplitBar ID="RadSplitbar2" runat="server" CollapseMode="Forward"></telerik:RadSplitBar>
                    <telerik:RadPane ID="BottomPane" runat="server" OnClientCollapsing="PaneCollapsing"
                        OnClientCollapsed="PaneCollapsed" OnClientResizing="PaneResizing" OnClientExpanding="PaneExpanding"
                        OnClientExpanded="PaneExpanded" OnClientResized="PaneResized">
                        Bottom Pane
                    </telerik:RadPane>
                </telerik:RadSplitter>
            </telerik:RadPane>
            <telerik:RadSplitBar ID="RadSplitbar1" runat="server" CollapseMode="Backward"></telerik:RadSplitBar>
            <telerik:RadPane ID="RightPane" runat="server" OnClientExpanding="PaneExpanding"
                OnClientCollapsing="PaneCollapsing" OnClientResizing="PaneResizing" OnClientExpanded="PaneExpanded"
                OnClientCollapsed="PaneCollapsed" OnClientResized="PaneResized">
                Right Pane
            </telerik:RadPane>
        </telerik:RadSplitter>
        <qsf:EventLogConsole ID="EventLogConsole1" runat="server" AllowClear="true" />
        <qsf:Footer runat="server" ID="Footer1"></qsf:Footer>
        </form>
    </body>
    </html>

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