Hey guys,

I like the way the ColumnsSelectionButton looks on the right side of the group panel.  Instead of using it for selection, would there be a way to easily reuse this control to show/hide the associated column?

Thanks!

Hello,

We have a performance issue with RadGridView when using telerik's grouping.

For example:

Sorting can take about 4 seconds. while sorting without grouping, lasts less then a second.

The same issue happens when clearing the ItemSource and then use AddRange of several items.

The JetBrains dotTrace shows that most of the time spent in "Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel.MeasureOverride(size)"  - 2471 milliseconds. The same operation lasts 79 Milliseconds without grouping.

We defined the gridview with the following:

GroupRendererMode = "Flat"

VirtualizingPanel.IsVirtualizingWhenGrouping = "True"

VirtualizingPanel.IsVirtualizing = "True"

VirtualizingPanel.VirtualizationMode= "Recycling"

EnableRowVirtualization="True"

EnableColumnVirtualization="True"

In addition,  the height and the columns width are fixed size.

We hope you can help us.
Thank you in advance.

Hi dear Telerik Team,

I have a problem with the positioning as context menu.

I would like to show the menu at mouse position. But it appears somewhere else.
See screenshot. The mouse was over the green box. 
The screenshot is taken from your xaml examples.

Mouse and MousePoint have the same problem.

How can I solve this.

I'm running into the following issue with RadRichTextBox and the RadRichTextBoxRibbonUI. I have a simple xaml file with just a RadRichTextBoxRibbonUI and a RadRichTextBox. I run the app and type some text in the RadRichTextBox editor. It shows up in the font displayed in the RadRichTextBoxRibbonUI. The problem occurs if I want to change the font of subsequent text. If I go to the font control and change the font, the font control retains focus. If I click back into the RadRichTextBox control to type some text, the font reverts to the font currently in the control and Ignores the font that I had selected in the font control. For comparison, when I do the same thing in MS Word, the editor retains focus so that after you've changed the font you can just start typing and the new text is displayed in the newly selected font. Is there a way to get this behaviour with RadRichTextBoxRibbonUI and RadRichTextBox?

Thanks for your attention,

George

Can someone please inform me how you can set this type of control either in xaml or code behind to be in TypeOver mode rather than Insert mode?

I have searched the web and can't seem to find anything...

I am trying to create custom Shape and custom ContainerShape.
I have successfully customized Shape.
But I am having a problem with customizing ContainerShape.

Below is code snippet for Model, .xaml and .cs.
When I set targetType of <style> to either Telerik:RadDiagramShape or Telerik:RadDiagramContainerShape, things work fine.
If I set CustomShape to targetType, this also works fine.
But, if I set CustomContainerShape to targetType, an error seems to occur when graphSource.AddNode(node) is excuted and StyleSelector returns Style, with InvalidOperationException error, and program terminates.

In the below code, FlowItemNode is okay. But FlowGroupNode is causing an error.
Even when I am using FlowGroupNode, if I set targetType of <style> to Telerik:RadDiagramContainerShape, it works okay.
 
I want to use CustomContainerShape so that I can implement or customize Drag and Drop(ex: drag entered, on drag, dropped) within CustomContainerShape class.
 
What am I doing wrong and How can I achieve this?

Thanks in advance.

//Selector
Class DiagramShapeSelector : StyleSelector
{
 Public override Style SelectStyle(object item, DependencyObject container)
 {
  If(item is FlowItemNode)
  {
   Return ForShapeStyle
  }
  Else if (item if FlowGroupNode)
  {
   Return ForGroupShapeStyle
  }
 }
}


 Code
//Model for shape
public class FlowItemNode : FlowItemViewModel, IDiagramNode
{
    ......
}
 
//Model for containerShape
Public Class FlowGroupViewModel<DiagramNode> : FlowItemViewModel, IContainerItem
{
}
Public class FlowGroupNode : FlowGroupViewModel<IDiagramNode>, IDiagramNode
{
    ......
}

 xaml
<local:CustomDiagram
ShapeStyleSelector = {StaticResource DiagramShapeSelector}
……
/>
<Style x:Key="ForShapeStyle" TargetType="telerik:RadDiagramContainerShape">
    <Setter Property="Position" Value="{Binding Position, Mode=TwoWay}" />
</Style>
 
<Style x:Key="ForGroupShapeStyle" TargetType="diagram:CustomContainerShape">
    <Setter Property="Position" Value="{Binding Position, Mode=TwoWay}" />
</Style>
 .cs
//Selector
Class DiagramShapeSelector : StyleSelector
{
 Public override Style SelectStyle(object item, DependencyObject container)
 {
  If(item is FlowItemNode)
  {
   Return ForShapeStyle
  }
  Else if (item if FlowGroupNode)
  {
   Return ForGroupShapeStyle
  }
 }
}
// CustomRadDiagram
    public class CustomDiagram : RadDiagram
    {
        protected override bool IsItemItsOwnShapeContainerOverride(object item)
        {
            if (item is FlowItemNode)
            {
                return item is CustomContainerShape;
            }
            else return item is CustomShape;
        }
        protected override Telerik.Windows.Diagrams.Core.IShape GetShapeContainerForItemOverride(object item)
        {
            if (item is FlowItemNode)
            {
                return new CustomContainerShape(this);
            }
            else return new CustomShape(this);
        }
    }
 
// CustomShape
   public class CustomShape : RadDiagramShape
    {
        public CustomShape(CustomDiagram diagram)
        {
        }
    }
 
// CustomContainershape
   public class CustomConnection : RadDiagramConnection
    {
        public CustomConnection(CustomDiagram diagram)
        {
        }
    }

Hello.

Sorry for my "English" :)

VirtualGrid was added in xaml markup and it was subscribed to OverlayBrushesNeeded using EventToCommandBehavior.