Questions on UI for WPF Forum

1 answer

271 views

Hi
we are trying to override RadAutoComplete default style. (right click on the control in Document outline window=> Edit Template => Edit A copy)
We would like that the RadListBox Popup that appears when a text is being typed in the RadAutoCompleteBox will have a different style.
(The new popup template will be => TextBlock as a Header than the RadListBox then TextBlock as a footer).
The RadAutoCompleteBox is binded the to a ObservableCollection.
The problem is that the when we try to override the default style (we haven't change it yet, we just use it) no values appear in the ListBox.
If we don't override the default style the RadAutoComplete works fine.
Can you help us solve the problem?

(this section will be overrided to achieve the desired behavior:
<Popup x:Name="PART_Popup">
<Grid x:Name="PopupRoot">
<telerik:RadListBox x:Name="PART_ListBox" CanKeyboardNavigationSelectItems="{x:Null}" IsTabStop="False" ItemTemplate="{TemplateBinding DropDownItemTemplate}" IsTextSearchEnabled="True" MaxHeight="{TemplateBinding MaxDropDownHeight}" MinWidth="{TemplateBinding MinDropDownWidth}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" SelectedValueBinding="{x:Null}" TextBinding="{x:Null}" KeyboardNavigation.TabNavigation="Once">
<telerik:StyleManager.Theme>
<telerik:Office_BlackTheme/>
</telerik:StyleManager.Theme>
</telerik:RadListBox>
</Grid>
</Popup>

)

AutoCompleteBox

answered on 21 Feb 2013

4 answers

127 views

Performance issue

Hello Support,
I have very serious issue with breadcrumb performance, I have created Windows file explorer like utility and displaying hierarchical structure in breadcrumb. It works fine until I browse a folder which contains more than 10K folder, the UI freezes every time and it takes lot of time to list folders in breadcrumb.

I am wondering why breadcrumb does not support virtualization out of the box? and what is the workaround forit.

Any help is appreciated.
thanks,
earthcaller

BreadCrumb

answered on 21 Feb 2013

1 answer

183 views

RadPieChart displaying Labels and values

Hi there,

Is there a way to show the value of the pie slice along with the label in the RadPieChart.

Thanks,
wade

ChartView

answered on 21 Feb 2013

1 answer

86 views

ChartTrackBallBehavior on Polarchart

I have been able to add the charttrackballbehavior, but all i get is a small rounded rectangle at the top of my page, when I mouse-over the chart. I read something about adorners, would it be possible that one of my own adorners is somehow interfering, or is this behavior simply not supported for the polarchart?

ChartView

answered on 21 Feb 2013

1 answer

131 views

Migrating from WinForms property grid using RadPropertyStore

I currently use the WinForms property grid with a RadPropertyStore - is there a simple migration path in order to be able to use the WPF one, or is it a case of modifying code and maintaining two separate code bases for the WPF and WinForms versions (as I will need to retain the WinForms functionality)?

Thanks

Matt

PropertyGrid

answered on 21 Feb 2013

4 answers

227 views

GridView Perfomance in Canvas

Hello. I have big problem with gridView perfomance. I have my MDI container like - Grid->ScrollViewer -> Canvas. I add ContentControls to the canvas. ContenControls has next structure: Grid -> Grid -> RadBusyIndicator -> GridView. All grids has Height="*". I read next article - http://www.telerik.com/help/silverlight/gridview-troubleshooting-performance.html and I have question. Can ScrollViewer slow my GridView?

GridView

answered on 20 Feb 2013

2 answers

547 views

Programmatically set SelectedItem(s)

I am using a RadAutoCompleteBox to list/select an assigned user to an object. The data is unbound and the itemssource is generated by polling an Active Directory tree. When an item is selected, the value is stored in the property of the datacontext as the principal's SID. My problem is that when I later access the object, I cannot set the SelectedItem of the RadAutoCompleteBox to one of the principals in the list and I have to resort to setting the SearchText which still pops up the suggested values when the control receives focus. I would like to be able to set the SelectedItem instead so this does not happen.

In the Page.xaml

<telerik:RadAutoCompleteBox

x:Name="PrincipalAutoCompleteBox"

WatermarkContent="Select a principal"

TextSearchMode="Contains"

AutoCompleteMode="SuggestAppend"

SelectionMode="Single"

TextSearchPath="Name"

DropDownItemTemplate="{StaticResource ResourceKey=DSPrincipalAutoComplete}"

DropDownWidth="Auto"

FilteringBehavior="{StaticResource ResourceKey=CustomFilteringBehaviour}"

GotFocus="PrincipalAutoCompleteBox_GotFocus"

KeyDown="PrincipalAutoCompleteBox_KeyDown"

Populated="PrincipalAutoCompleteBox_Populated"

/>

In the Page.xaml.vb

Private Sub PrincipalAutoCompleteBox_GotFocus(sender As System.Object, e As System.Windows.RoutedEventArgs)

Dim autoComplete As RadAutoCompleteBox = DirectCast(sender, RadAutoCompleteBox)

Dim searchString As String = autoComplete.SearchText

If autoComplete.SelectedItem IsNot Nothing Then

searchString = BindingExpressionHelper.GetValue(autoComplete.SelectedItem, autoComplete.DisplayMemberPath).ToString()

End If

autoComplete.IsDropDownOpen = False

autoComplete.Populate(searchString)

End Sub

Private lastFilteredItems As IEnumerable(Of Object)

Private Sub PrincipalAutoCompleteBox_KeyDown(sender As System.Object, e As System.Windows.Input.KeyEventArgs)

Dim autoCompleteBox As RadAutoCompleteBox = DirectCast(sender, RadAutoCompleteBox)

If e.Key = Key.Tab AndAlso e.Handled = False AndAlso autoCompleteBox.SelectedItem Is Nothing Then

If lastFilteredItems.Count = 1 Then

autoCompleteBox.SelectedItem = lastFilteredItems.OfType(Of Object).FirstOrDefault

Else

autoCompleteBox.SearchText = Nothing

End If

End Sub

Private Sub PrincipalAutoCompleteBox_Populated(sender As System.Object, e As System.EventArgs)

Me.lastFilteredItems = DirectCast(sender, RadAutoCompleteBox).FilteredItems

End Sub

And the custom filter

Public Class CustomFilteringBehaviour

Inherits Telerik.Windows.Controls.FilteringBehavior

Public Overrides Function FindMatchingItems(searchText As String, items As System.Collections.IList, escapedItems As System.Collections.Generic.IEnumerable(Of Object), textSearchPath As String, textSearchMode As Telerik.Windows.Controls.TextSearchMode) As System.Collections.Generic.IEnumerable(Of Object)

If String.IsNullOrEmpty(searchText) Then

Return items.OfType(Of Object).Where(Function(x) Not escapedItems.Contains(x))

Else

Return MyBase.FindMatchingItems(searchText, items, escapedItems, textSearchPath, textSearchMode)

End If

End Function

End Class

Finally, the code where I populate the the list and attempted to preselect an item based on the datacontext

'^-- principalList As ObservableCollection(Of DSPrincipal) and then populated from AD

PrincipalAutoCompleteBox.ItemsSource = principalList

For Each principal As DSPrincipal In principalList

If principal.Sid = DirectCast(Me.DataContext, MyObject).Principal.SID Then

'v-- What I tried to do but it threw an error

'PrincipalAutoCompleteBox.SelectedItem = principal

'v-- What I ended up doing

PrincipalAutoCompleteBox.SearchText = _principal.Name

Exit For

End If

Next

Is it possible to set SelectedItem in some way? Would binding SelectedItem to the property allow it to display automatically when the datacontext changes? What I have works but I would like a consistant experience for my user where the suggested items do not pop up when the value has been set previously.

Thanks,
Jason

AutoCompleteBox

answered on 20 Feb 2013

1 answer

161 views

Filtering with converter applied to datamemberbinding

Hi,

I have applied a converter to DataMemberBinding, but filter doesn't take this converter into account..
Checkboxes that appear in filtering control shows the values that are displayed (after calling converter), but typing the same values in textbox that is shown below doesn't filter on those displayed values.

Is there a way to achieve the filtering based on the converted values from the textbox.

Thanks,
Pankaj

GridView

answered on 20 Feb 2013

4 answers

1.1K+ views

[Solved] Apply converter to GridViewDataColumn

How to apply converter to a GridViewDataColumn??
I have a column for which i need to truncate the display of string after particular delimiter.
Should we use a Converter, if so how? or else how can we trim the string??

GridView

answered on 20 Feb 2013

1 answer

82 views

RibbonView w/ Windows 8 theme RD - Blend with Sketchflow for VS 2012 preview crashing

I've created a resource dictionary RadRibbon and copied/pasted the resources from the NET40 implicit style resource dictionary. Visual studio 2012 renders & builds fine, but Blend crashes whenever I open the project. When I debug blend with vs 2012, it reports:

'{DependencyProperty.UnsetValue}' is not a valid value for the 'Telerik.Windows.Controls.RadRibbonGallery.Icon' property on a Setter.

Please advise.

RibbonView and RibbonWindow

answered on 20 Feb 2013