Hello Telerik,

in the WPF RadRichTextBox I have this example text:

"Hello my friend, everything is great today".

Now the user selects only the word 'great' and I want to increase the fontsize +2 only for this word.

My code looks like this:

private async Task<bool> FormatIncreaseFont()
        {
            await Task.Delay(1);

            double newFontSize = 0;

            var boxes = RichTextBox.Document.Selection.GetSelectedBoxes();

            foreach (var box in boxes)
            {

                //AssociatedDocumentElement is wrong.
                Span span = box.AssociatedDocumentElement as Span;
                if (span != null)
                {
                    newFontSize = (newFontSize == 0) ? Math.Round(Unit.DipToPoint(span.FontSize), 0) + 2 : newFontSize;

                    //span.FontSize is also wrong
                    span.FontSize = Unit.PointToDip(newFontSize);
                }
            }

            RichTextBox.UpdateEditorLayout();

            return true;
        }

AssociatedDocumentElement is the span where the InlineLayoutBox lives in, so I get the wrong font size.

Also I am changing the font size of the whole span, not only the InlineLayoutBox .

My questions are:

1.) How do I get the current font size of the InlineLayoutBox ("great").

2.) How do I then change the font size only for this InlineLayoutBox ("great").

Thank you!

Hello,

I have a requirement to display two x-axis for a single series. The data is a collection of measurements and the client would like to see each point relative to the start and also relative to the end. For example, if there are 10 points along a 100m distance, the third point is 30m from the start, and 70m from the end. Is there a way to accommodate this?

So far I have only found a way to make multiple x-axis for a chart, but each series in that chart only has one x-axis. My only thought was to create a second series with reverse data that would be included, but hidden under the first data since they line up perfectly. Is there another way? Thanks.

Hallo, I'm using RadWebCam control into a UserControl and everything works as expected.

So, if I call myradwebcam.TakeSnapShot() within the UserControl that contains the RadWebCam control, everything is ok.

But if I call myradwebcam.TakeSnapShot() from another class (i.e. another UserControl) I receive a System.NullReferenceException.

Am I doing something wrong?

Thank's,

Luca

P.S. Here the exception:

System.NullReferenceException
  HResult=0x80004003
  Messaggio=Riferimento a un oggetto non impostato su un'istanza di oggetto.
  Origine=Telerik.Windows.Controls.Media
  Analisi dello stack:
   in Telerik.Windows.Controls.RadWebCam.TakeSnapshot()
   in TestVisoreIfm.Pannello_Dashboard.btnScansione_Click(Object sender, RoutedEventArgs e) in D:\repos\TestVisoreIfm\Pannello_Dashboard.xaml.cs: riga 517

Hello,

I have a window that contains a RadRibbonView:

<telerik:RadRibbonView x:Name="PART_MainMenu" BackstageClippingElement="{Binding RelativeSource={RelativeSource Mode=FindAncestor,AncestorType=telerik:RadDockPanel}}"  IsMinimizable="true">
            <telerik:RadRibbonView.Backstage>
                <telerik:RadRibbonBackstage x:Name="backstage" BackstagePosition="Office2013" Background="{StaticResource ATS_Brush_Gray240}">                                    <telerik:RadRibbonBackstageItem Header="Informations">
                        <Grid>
                            <TextBlock Text="Log-out" Background="Transparent" HorizontalAlignment="Center" VerticalAlignment="Center" Foreground="DarkSlateGray"/>
                        </Grid>
                    </telerik:RadRibbonBackstageItem>                                       
                </telerik:RadRibbonBackstage>
            </telerik:RadRibbonView.Backstage>

</telerik:RadRibbonView>

I display a simple text "Log-out" in a single telerik:RadRibbonBackstageItem.

I change by code the property Thread.CurrentThread.CurrentUICulture to an arabic culture.

I change equally by code the property FlowDirection of the window to the value RightToLeft.

Because of property value inheritance, this property is supposed to be automatically changed for all child elements.

However, the text is mirrored (see file in attachment).

How can we fix that issue ?

Thanks,

Alexandre

I'm making a custom behavior for Telerik's RadGridView.
When this behavior is attached and its `PropertyName` is set to same property as specified by
DataMemberBinding value of some of the GridViewCheckBoxColumn of the grid, then toggling the checkbox in that column will apply same checkbox state to all selected rows (but only to the same column).  

That happens in the `ApplyToAllSelected` method, namely in `gvcb.SetCurrentValue(GridViewCheckBox.IsCheckedProperty, isChecked);` line. The visuals are working as expected, and all checkbox values are updated on screen.

**The Problem** is that the binding source is not updated for those rows. Only for the one where click happened. `GridViewCheckBox.IsChecked` dependency property does not seem to be bound directly to the datacontext's property, so `gvcb.GetBindingExpression(GridViewCheckBox.IsChecked)` returns `null`.

**The Question**: how to update source after setting checkbox state?


```
public sealed class CheckAllSelectedBehavior : Behavior<RadGridView>
    {
        public event EventHandler Toggled;

        public string PropertyName { get; set; }

        protected override void OnAttached()
        {
            base.OnAttached();

            this.AssociatedObject.PreparingCellForEdit += this.AssociatedObject_PreparedCellForEdit;
            this.AssociatedObject.CellEditEnded += this.AssociatedObject_CellEditEnded;
        }

        protected override void OnDetaching()
        {
            this.AssociatedObject.PreparingCellForEdit -= this.AssociatedObject_PreparedCellForEdit;
            this.AssociatedObject.CellEditEnded -= this.AssociatedObject_CellEditEnded;
            base.OnDetaching();
        }

        private void AssociatedObject_CellEditEnded(object sender, GridViewCellEditEndedEventArgs e)
        {
            if (e.Cell.Column.UniqueName == this.PropertyName && e.EditingElement is CheckBox cb)
            {
                cb.Checked -= this.Cb_Checked;
                cb.Unchecked -= this.Cb_Unchecked;
            }
        }

        private void AssociatedObject_PreparedCellForEdit(object sender, GridViewPreparingCellForEditEventArgs e)
        {
            if (e.Column.UniqueName == this.PropertyName && e.EditingElement is CheckBox cb)
            {
                cb.Checked += this.Cb_Checked;
                cb.Unchecked += this.Cb_Unchecked;
            }
        }

        private void Cb_Unchecked(object sender, System.Windows.RoutedEventArgs e)
        {
            this.ApplyToAllSelected(false);
        }

        private void Cb_Checked(object sender, System.Windows.RoutedEventArgs e)
        {
            this.ApplyToAllSelected(true);
        }

        private void ApplyToAllSelected(bool isChecked)
        {
            foreach (var item in this.AssociatedObject.SelectedItems)
            {
                var row = this.AssociatedObject.GetRowForItem(item);
                var cell = row.GetCellFromPropertyName(this.PropertyName);
                if (cell.Content is GridViewCheckBox gvcb)
                {
                    gvcb.SetCurrentValue(GridViewCheckBox.IsCheckedProperty, isChecked);
                }
            }

            this.Toggled?.Invoke(this, EventArgs.Empty);
        }
    }
```

This is a copy of [StackOverflow Thread](https://stackoverflow.com/questions/62192784/programatically-change-state-of-gridviewcheckboxcolumn-row-with-updating-binding)

Very simple question. How do I statically change content? I figured something like this example:

But it doesn't work, saying that content is set multiple times.