how to wrap treeview control events

[manjerekar]

Hi Team,

I'm writing a wrapper class basically to enable only few of the properties and events from the RadTreeView control.

i want to enable the events

Selected

 

 

="radTreeView1_Selected" Expanded="radTreeView1_Expanded" Collapsed="radTreeView1_Collapsed"

 

of the RadTreeView control in my wrapper class. 

here is my wrapper class.

public

 

 

class TngTreeView : TngBaseControl

 

{

#region

 

 

Constructors

 

 

 

static TngTreeView()

 

{

DefaultStyleKeyProperty.OverrideMetadata(

 

typeof(TngTreeView), new FrameworkPropertyMetadata(typeof(TngTreeView)));

 

RegisterDependencyProperties(

 

typeof(TngTreeView), typeof(RadTreeView));

 

}

 

 

public TngTreeView()

 

{

InternalFrameworkElement =

 

new RadTreeView();

 

 

 

this.AddVisualChild(InternalFrameworkElement);

 

}

#endregion

#region

 

 

Internal Control

 

 

 

private RadTreeView TreeView

 

{

 

 

get

 

{

 

 

return InternalFrameworkElement as RadTreeView;

 

}

}

 

 

public RadTreeView InternalControl

 

{

 

 

get

 

{

 

 

return TreeView;

 

}

 

 

set

 

{

InternalControlSetter(TreeView,

 

value);

 

}

}

#endregion

 

 

 

#region

 

 

Property: ToolTip

 

 

 

public string ToolTip

 

{

 

 

get { return (string)TreeView.GetValue(RadTreeView.ToolTipProperty); }

 

 

 

set { TreeView.SetValue(RadTreeView.ToolTipProperty, value); }

 

}

#endregion

}

appreciate your help

Manjerekar Rao

[Miroslav]

Hello manjerekar,

Could you elaborate a little on the problems you are encountering? Does registering for the TreeView events and re-raising them as custom events work in your case?

Regards,
Miroslav
the Telerik team

[manjerekar]

I haven't registered yet.
i want to register the TreeView events and re-raise them as custom events. how to do this?

do u have any contact no. to call you and do you provide instant chat facility.


help much appreciated
Manjerekar Rao

[Miroslav]

Hi manjerekar,

If you want to expose simple CLR events this may happen like so:

public class TngTreeView
{
    RadTreeView treeView;

    public TngTreeView()
    {
        treeView.Expanded += new
            EventHandler<RadRoutedEventArgs>(treeView_Expanded);
    }

    void treeView_Expanded(object sender, RadRoutedEventArgs e)
    {
        if (this.Expanded != null)
        {
            this.Expanded(this, e);
        }
    }

    public event EventHandler<RadRoutedEventArgs> Expanded;
}

We do not normally offer phone support - we will be happy to anwer your question here.

All the best,
Miroslav
the Telerik team

[Srinivas]

Hi Miroslav,

These is with reference to your's and Manjurekar's post.

The answer that you repiled in code says that , the end user should use Telerik DLL to use those wraped events. which that we (manjurekar and me) not required . End user should use the DLL what we provided from the framework we are developing and able to use the events.


Thanks ,
Srinivas

[Miroslav]

Hi Srinivas,

Yes, the Telerik dlls will be needed since the wrapper dlls will be referencing them. It will not be possible to wrap the Telerik controls without eventually using the dlls.

If you want to have a different public API, you can just expose an event with custom event args, say

public event EventHandler<MyEventArgs> Expanded;

All the best,
Miroslav
the Telerik team