Questions on UI for WPF Forum

5 answers

105 views

Good morning

I am developing an application WPF touchscreen, I need to have scrolling programatically.
The example 117850_117835 if it works to me, but with Q3 displays error in the following line.

Panel = Me.RadGridView1.ItemsControl.VirtualizingPanel

'temsControl' is not a member of 'Telerik.Windows.Controls.RadGridView'
As it works in the Q3

Thanks

GridView

answered on 11 Jan 2010

6 answers

157 views

Determine row an column of an item

Is there a way to determine the actual position of a RadTileViewItem in a RadTileView? Something like
RadTileView.GetPosition(RadTileViewItem item, out int row, out int column)?

Thanks,
Michael

TileView

answered on 10 Jan 2010

7 answers

186 views

Multiple notifications when item is checked

Hi,

I've created a treeview which has the TriStateMode enabled and defined a callback function when an item were checked/unchecked.

My problem is that I get notified multiple times if a subitem was checked. The first notification is for the top element, and the next notification is for the top level's child element and so on... The last notification is the checked item itself.

Is there a way to determine the item which was checked?

Thanks
Dieter

TreeView

answered on 08 Jan 2010

1 answer

83 views

pt-br resource

Hello :)
Exists pt-br resource for WPF controls?

General Discussions

answered on 08 Jan 2010

2 answers

98 views

[Solved] Strange behaviour on vertical scrolling

I have a gridview, using version 2009.3.1208.35 and MVVM. Style and visibility is applied like the following:

                            <telerik:RadGridView.Resources>         
                        <Style TargetType="{x:Type GridView:GridViewRow}">         
                            <Setter Property="Background" Value="#FFFFe1" />         
                            <Style.Triggers>         
                                <DataTrigger Binding="{Binding Path=OperationId}" Value="0">         
                                    <DataTrigger.Setters>         
                                        <Setter Property="Background" Value="#FFFFFF" />         
                                    </DataTrigger.Setters>         
                                </DataTrigger>         
                                <DataTrigger Binding="{Binding Path=OperationStatus}" Value="9">         
                                    <DataTrigger.Setters>         
                                        <Setter Property="Visibility" Value="Collapsed" />         
                                    </DataTrigger.Setters>         
                                </DataTrigger>         
                            </Style.Triggers>         
                        </Style>         
                    </telerik:RadGridView.Resources>         
                     

Everything looks fine when the grid is loaded, but, if I scroll vertically, it seems like <Setter Property="Visibility" Value="Collapsed" /> doesn't work anymore. No more rows are collapsed. Is this is a bug, or am I missing something?

Roy

GridView

answered on 08 Jan 2010

1 answer

168 views

Shrink Column Width

Hello,

The column of my grid is set to SizeToContent, which of course causes my column size to increase to the size of the lengthiest data in the column, which is great. When the row is removed, however, the column remains at that extended size. I would like to be able to have my column automatically "snap back" to the next lengthiest bit of data remaining in the grid, but have been unable to find a way to accomplish this with any of the existing properties. Is there a way to accomplish this kind of behaviour I'm missing?

Thanks,

Dave

GridView

answered on 08 Jan 2010

3 answers

631 views

TabControl with Custom ContentTemplate not redrawing

I have a RadTabControl with a Custom ContentTemplate. It works fine, and displays the content as I'd expect when first viewing the tab. However, when changing from one tab, back to the original tab, I find that the data inside the content presenter is no longer being displayed. It appears as if the DataContext or ItemsSource binding is no longer being applied as I'd expect.

Below is a short expample which should illustrade what I'm seeing. I'm using MVVM, and the ClosedOrderCol in the code snippet below is an ObservableCollection on the ViewModel.

Any help would be appreciated.

    
            <Navigation:RadTabControl> 
        
                        <Navigation:RadTabControl.ItemContainerStyle> 
        
                                <Setter Property="ContentTemplate"> 
        
                                    <Setter.Value> 
        
                                        <DataTemplate>

                                            <Grid> 
        
                                               <ContentPresenter Content="{TemplateBinding Content}"/>

                                            </Grid>

                                        </DataTemplate> 
        
                                    </Setter.Value> 
        
                                </Setter> 
        
                        </Navigation:RadTabControl.ItemContainerStyle> 
        
                        <Navigation:RadTabItem> 
        
                                <Controls:RadGridView Grid.Row="1" ItemsSource="{Binding ClosedOrderCol}" IsReadOnly="True"> 
        
                                    <Controls:RadGridView.Columns>                        
        
                                       <Controls:GridViewDataColumn Header="Closed" DataMemberBinding="{Binding DateClosed}" /> 
        
                                    </Controls:RadGridView> 
        
                        </Navigation:RadTabItem> 
        
                        <Navigation:RadTabItem /> 
        
            <Navigation:RadTabControl>

TabControl

answered on 08 Jan 2010

7 answers

169 views

Select GridViewCell

How do I select a new row, column[0] when I add it to my grid in code?

private void Button_Add_Items_Click(object sender, RoutedEventArgs e)

{

Item item = new Item();

i.ItemList.Add(item);

rgvItems.SelectedItem = rgvItems.Items[rgvItems.Items.Count -1];

rgvItems.ScrollIntoView(rgvItems.SelectedItem);

//rgvItems.BeginEdit();

}

The BeginEdit takes me to the first row and column.

Thanks!

GridView

answered on 08 Jan 2010

3 answers

306 views

Axis label color - same with series color

Hello!

I use a Chart of many different line series and I want to take advantage of multiple Y Axis in my chart but it's kind of confusing at some point because you could not tell which axes is related to which line series. It would be very helpful if I could somehow bind the color of the line series with the color of the Y axis label or line label, but it seams that I cannot find a way.
Right now I am trying to create a style for the AxisTitle that uses the same SolidColorBrush that the line series has (guess what - this is null when I'm trying to get it).

    
            Style axisTitleStyleItem = new Style( typeof( AxisTitle ) );

            axisTitleStyleItem.Setters.Add( new Setter 

              { Property = Control.ForegroundProperty,

                Value = (SolidColorBrush)secondaryLineSeries.Appearance.Stroke } );

Maybe I'm not taking the right approach. Help would be welcomed at this point.
Thank you!
Roxana

Chart

answered on 08 Jan 2010

1 answer

81 views

NullReferenceException in Grid when Items are empty

We are using version 2009.1.526.35 of the GridView control. In some situations, we are encountering NullReferenceExceptions when the GridView attempts to layout with no items in it. We have found this problem happening under at least 2 scenarios:

1) Calling ApplyTemplate() on the GridView and all of its template children recursively.

2) Clearing/Removing all items from the GridView (in this case it seems to happen randomly - definitely not always).

In both cases, the problem is in the Measure pass and appears to be a problem with the GridView's panel. Looks like it is trying to access an item or the first item in the Grid when it is empty.

1) Is this a known issue?

2) Is it fixed in a newer version of the control?

Stack Trace:

at System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgumentargument, ExceptionResource resource)

at System.ThrowHelper.ThrowArgumentOutOfRangeException()

at System.Collections.Generic.List`1.get_Item(Int32 index)

atTelerik.Windows.Controls.GridView.GridViewVirtualizingPanel.GetChildIndexByPhysicalOffset(Doubleoffset)

atTelerik.Windows.Controls.GridView.GridViewVirtualizingPanel.UpdateFirstVisibleChildIndex(Doubleoffset)

atTelerik.Windows.Controls.GridView.GridViewVirtualizingPanel.SetVerticalOffset(Doubleoffset)

atTelerik.Windows.Controls.GridView.GridViewVirtualizingPanel.ResetVerticalOffset()

atTelerik.Windows.Controls.GridView.BaseVirtualizingPanel.MeasureOverride(SizeavailableSize)

at System.Windows.FrameworkElement.MeasureCore(Size availableSize)

at System.Windows.UIElement.Measure(Size availableSize)

at System.Windows.ContextLayoutManager.UpdateLayout()

at System.Windows.ContextLayoutManager.UpdateLayoutCallback(Objectarg)

at System.Windows.Media.MediaContext.InvokeOnRenderCallback.DoWork()

at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()

at System.Windows.Media.MediaContext.RenderMessageHandlerCore(ObjectresizedCompositionTarget)

at System.Windows.Media.MediaContext.RenderMessageHandler(ObjectresizedCompositionTarget)

at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegatecallback, Object args, Boolean isSingleParameter)

at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source,Delegate callback, Object args, Boolean isSingleParameter, DelegatecatchHandler)

GridView

answered on 08 Jan 2010