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Thread: [CLOSED] TreePanel + Listeners + Click/BeforeClick

  1. #1
    Premium Member
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    Feb 2009
    Posts
    364

    [CLOSED] TreePanel + Listeners + Click/BeforeClick

    I noticing that Click and BeforeClick on the TreePanel have the same behavior. I don't know if this is an ExtJS problem or a Coolite problem.

    Here is some code to demonostrate the problem. Here is the .aspx page:

    Code:
    <script language="javascript" type="text/javascript">
    var PanelEvents = {
    getSelectModel: function(panelName)
    {
      try {
        var panel = Ext.getCmp(panelName);
    
        alert(panel.selModel.getSelectedNode().id);
        } catch(err) {
          Ext.Msg.alert('Javascript Error', err.description);
        }
      }
    }
    </script>
    
    <ext:TreePanel ID="tpPanel" runat="server" AutoScroll="true" Border="false" RootVisible="false" IDMode="Static">
      <Loader>
        <ext:PageTreeLoader OnNodeLoad="tpPanel_NodeLoad" />
      </Loader>
      <Listeners>
        <Click Handler="PanelEvents.getSelectModel('tpPanel');" />
      </Listeners>
    </ext:TreePanel>
    Here is the code behind:

    Code:
    protected void Page_Load(object sender, EventArgs e)
    {
      if (!this.IsPostBack &amp;&amp; !Ext.IsAjaxRequest)
      {
        this.BuildUsersTree();
      }
    }
    
    protected void tpPanel_NodeLoad(object sender, NodeLoadEventArgs e) 
    {
      if (!string.IsNullOrEmpty(e.NodeID))
      {
      // Do some stuff here
      }
      }
    
      private void BuildUsersTree()
      {
      IntUsers.Users user = new IntUsers.Users(this.ConnectionString);
      DataTable users = user.GetUsers();
    
      TreeNode nodeUsers = new TreeNode("Users", Icon.Group);
      tpPanel.Users.Add(nodeUsers);
    
      if (users != null &amp;&amp; users.Rows.Count > 0)
      {
      foreach(DataRow data in users.Rows)
      {
      string fullName = Convert.ToString(data["FullName"]);
      string userId = Convert.ToString(data["UserId"]);
      bool isOnline = Convert.ToBoolean(data["IsOnline"]);
    
      Icon statusIcon = (isOnline) ? Icon.StatusOnline : Icon.StatusOffline;
    
      AsyncTreeNode userNode = new AsyncTreeNode("ur" + userId, fullName);
      userNode.Icon = statusIcon;
    
      nodeUsers.Nodes.add(userNode);
      }
      }
    }
    Now, the problem is that the selectedNode() isn't available on the Click listener at this point. It's excibiting the same behavior as a BeforeClick listener.

    If I fire the Click listener event, then I how am I suppose to get the currently selected node (or it's id)?

    Thanks.

  2. #2
    Premium Member
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    Feb 2009
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    364

    RE: [CLOSED] TreePanel + Listeners + Click/BeforeClick

    By the way, I do know about passing "node" from the call to the function.

    However, we are using this in various ways (other than just a call from Click) and we need to pull the selectionModel instead of the node.


    Thanks.



  3. #3
    Ext.NET - Dev Team geoffrey.mcgill's Avatar
    Join Date
    Jan 2008
    Location
    Canada
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    8,660

    RE: [CLOSED] TreePanel + Listeners + Click/BeforeClick

    Hi state,

    The first parameter sent to the .Handler for both <BeforeClick> and <Click> is an instance of the 'node'.

    Example

    Code:
    <%@ Page Language="C#" %>
    
    <%@ Register Assembly="Coolite.Ext.Web" Namespace="Coolite.Ext.Web" TagPrefix="ext" %>
    
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
        
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head id="Head1" runat="server">
        <title></title>
    </head>
    <body>
        <form id="form1" runat="server">
            <ext:ScriptManager runat="server" />
            <ext:TreePanel ID="TreePanel1" runat="server" Height="300" Width="185" Title="Tree">
                <Root>
                    <ext:TreeNode Text="Item1" Expanded="true">
                        <Nodes>
                            <ext:TreeNode Text="Item2" />
                            <ext:TreeNode Text="Item3" />
                        </Nodes>
                    </ext:TreeNode>
                </Root>
                <Listeners>
                    <BeforeClick Handler="console.log('BeforeClick', node);" />
                    <Click Handler="console.log('Click', node);" />
                </Listeners>
            </ext:TreePanel>
        </form>
    </body>
    </html>
    Hope this helps.

    Geoffrey McGill
    Ext.NET, Inc.
    Founder, and Dev Team

    Ext.NET Examples | Ext.NET API Docs | ExtJS API Docs | @extnet | Jobs

  4. #4
    Premium Member
    Join Date
    Feb 2009
    Posts
    364

    RE: [CLOSED] TreePanel + Listeners + Click/BeforeClick



    I don't know if Coolite supports a multiple select model in the TreePanel.

    So, how would this be handled in that case? Does the Click/BeforeClick pass back an array of selected nodes?

  5. #5
    Ext.NET - Dev Team geoffrey.mcgill's Avatar
    Join Date
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    Location
    Canada
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    RE: [CLOSED] TreePanel + Listeners + Click/BeforeClick

    There is MultiSelectionModel functionality, but we have yet to implemented this server-side.

    The following sample demonstrates how you can manually configure the MultiSelectionModel.

    Example

    Code:
    <ext:TreePanel ID="TreePanel1" runat="server" Height="300" Width="185" Title="Tree">
        <Root>
            <ext:TreeNode Text="Item1" Expanded="true">
                <Nodes>
                    <ext:TreeNode Text="Item2" />
                    <ext:TreeNode Text="Item3" />
                </Nodes>
            </ext:TreeNode>
        </Root>
        <CustomConfig>
            <ext:ConfigItem Name="selModel" Value="new Ext.tree.MultiSelectionModel()" Mode="Raw" />
        </CustomConfig>
        <Listeners>
            <BeforeClick Handler="console.log('BeforeClick', node);" />
            <Click Handler="console.log('Click', node);" />
        </Listeners>
    </ext:TreePanel>
    The BeforeClick and Click events are fired when each node is clicked (selected).


    Geoffrey McGill
    Ext.NET, Inc.
    Founder, and Dev Team

    Ext.NET Examples | Ext.NET API Docs | ExtJS API Docs | @extnet | Jobs

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