Questions on UI for WPF Forum

2 answers

63 views

With the latest 5-28 internal release, RadTileViews placed inside a RadPanelBar are now rendering 90 degrees off. Is there a setting to change this back or is this an unintentional bug.

TileView

answered on 03 Jun 2010

1 answer

121 views

Tree To Grid Demo fails

Try dragging an item from all products to Order grid's column caption. Bum.

---------------------------
Fatal error!
---------------------------
Error message: Object reference not set to an instance of an object.

StackTrace:    at Telerik.Windows.Examples.DragAndDrop.WPF.TreeToGrid.Example.OnGridViewDropInfo(Object sender, DragDropEventArgs e)

   at Telerik.Windows.Controls.DragDrop.DragDropEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget) in c:\Builds\WPF_Scrum\Core_WPF_2010_Q1\Sources\Development\Core\Controls\DragDrop\DragDropEventArgs.cs:line 47

   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)

   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)

   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)

   at Telerik.Windows.Controls.DragDrop.RadDragAndDropManager.RaiseDropInfo() in c:\Builds\WPF_Scrum\Core_WPF_2010_Q1\Sources\Development\Core\Controls\DragDrop\RadDragAndDropManager.cs:line 659

   at Telerik.Windows.Controls.DragDrop.RadDragAndDropManager.OnRealDrag(IMouseEventArgs e) in c:\Builds\WPF_Scrum\Core_WPF_2010_Q1\Sources\Development\Core\Controls\DragDrop\RadDragAndDropManager.cs:line 1242

   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)

   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)

   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)

   at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)

   at System.Windows.Input.InputManager.ProcessStagingArea()

   at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)

   at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)

   at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)

   at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)

   at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)

   at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)

   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)

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

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

---------------------------
OK
---------------------------

DragAndDrop

answered on 03 Jun 2010

1 answer

69 views

how to diplay text to inform empty data in RadCarousel

I am writing an ebook management which use RadTreView and RadCarousel. The Treeview allow user choose ebook category. When an ebook category is chosen the ebook in that category was updated. but some category still does not have any book so I want to display something inform the user that there is no book inside. Please advise for me how to do that

Best Regards,
Truong Pham

Carousel

answered on 02 Jun 2010

2 answers

154 views

WPF Browser as Carousel Item

Hello,

I am using the radcarousel panel and currently I am facing problems with wpf browser element. Namely my carousel contains several frame - elements which are containing a XAML - Page, something like this:

    
                    <ScrollViewer x:Name="carouselScrollViewer" CanContentScroll="True" VerticalScrollBarVisibility="Hidden" Margin="0"> 
        
                        <telerik:RadCarouselPanel x:Name="mainMenuCarousel"  
        
                         ItemsPerPage="3" PathPadding="0,0,0,100" d:LayoutOverrides="Width, Height" ScrollViewer.VerticalScrollBarVisibility="Hidden"> 
        
                            <Frame Width="600" Height="400" Content="Frame" Source="\View\MediaPlayerView.xaml" NavigationUIVisibility="Hidden" IsEnabled="False" ScrollViewer.VerticalScrollBarVisibility="Disabled"/> 
        
                            <Frame Width="600" Height="400" Content="Frame" Source="\View\WebBrowserView.xaml" NavigationUIVisibility="Hidden" ScrollViewer.VerticalScrollBarVisibility="Disabled"/> 
        
                            <Frame Width="600" Height="400" Content="Frame" Source="\View\MediaPlayerView.xaml" NavigationUIVisibility="Hidden" ScrollViewer.VerticalScrollBarVisibility="Disabled" Focusable="False" IsTabStop="False"/> 
        
                        </telerik:RadCarouselPanel> 
        
                    </ScrollViewer>

So my WebBrowserView has an wpf browser element. While scrolling radcarousel wpf browser element stays always top element although frame containing it isn't a selected item and overlaps items in foreground. Is it a common bug in wpf browser element or there is something wrong with radcarousel ?

Thank you.

Carousel

answered on 02 Jun 2010

5 answers

208 views

Animation when hiding pane

Hi!

I am using the "IsHidden" property to hide RadPanes in my WPF application.
This works fine.

What I want to do is to animate the "hiding/showing" of the panes. Is this possible?

Regards,
Lennart

Docking

answered on 02 Jun 2010

3 answers

124 views

Computed Columns / Derived Columns

Can I have a column whose value is derived from the difference of a column in two rows. Like:

For example I have following radgrid:

Row_Id Rank Derived Col

1 5 0

2 7 2

3 7 0

4 3 -4

Derived col = TableRow.Rank - TableRow(-1).Rank

Is it possible using bindings?

GridView

answered on 02 Jun 2010

1 answer

223 views

Scroll button only visible after window resizing

Hi,

I came across this scenario that appears to be a bug. When I bind a series of items to a RadTabControl that is not wide enough to show them the scroll buttons do not appear until I resize the window. This is the simplest way to duplicate:

XAML:

<Window x:Class="Workbench.RadTabControlTest"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:Controls="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Navigation" Title="RadTabControlTest" Height="400" Width="500">

<Grid>

<Grid.RowDefinitions>

</Grid.RowDefinitions>

<Button

Width="125"

Height="25"

Click="Button_Click">Set Items</Button>

<Controls:RadTabControl

x:Name="tabs"

Width="250"

Height="150"

Grid.Row="1"

/>

</Grid>

</Window>

And the code behind:

public partial class RadTabControlTest: Window

{

public RadTabControlTest()

{

InitializeComponent();

}

private void Button_Click(object sender, RoutedEventArgs e)

{

tabs.ItemsSource = new[] {"one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten"};

}

I am using the latest release and the project is .NET 4.0.

Am I doing something wrong?

Cheers,

Jose

TabControl

answered on 02 Jun 2010

1 answer

91 views

DateTime Entry

Which control allows me to enter a Date and Time in order to input or display a DateTime value?

DatePicker

answered on 02 Jun 2010

1 answer

104 views

Explicitly Inserting LineBreaks in ColumnHeaders

How can I explicitly indicate that I want a linebreak to be at a certain point in GridViewDataColumn header attribute?

    
            <telerik:GridViewDataColumn Header="Happy<LineBreakHere>(Days)"/>

I want the text to be centered with (Days) appearing underneath "Happy", and I want to do this without implementing any Wrapping/ColumnWidth tricks.

GridView

answered on 02 Jun 2010

3 answers

142 views

ToolTip Style

Is there some type of ToolTipStyle of a GridViewDataColumn? I'd like to change the background color and border color of the tooltip of some columns, but not others.

GridView

answered on 02 Jun 2010