Questions on UI for WPF Forum

1 answer

178 views

Hi,

I got following exception when I drop the the RadChartesianChart to the empty WPF project, move it and then resizing the chart size in design time?!

System.InvalidOperationException

Cannot set a property on object 'System.Windows.Media.TranslateTransform' because it is in a read-only state.

at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal) at System.Windows.DependencyObject.SetValueInternal(DependencyProperty dp, Object value) at Telerik.Windows.Controls.ChartView.CartesianAxis.UpdateAxisLine(ChartLayoutContext context) in c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\Common\CartesianAxis.cs:line 78 at Telerik.Windows.Controls.ChartView.LineAxis.UpdateUICore(ChartLayoutContext context) in c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\Common\LineAxis.cs:line 64 at Telerik.Windows.Controls.ChartView.PresenterBase.UpdateUI(ChartLayoutContext context) in c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\Common\PresenterBase.cs:line 204 at Telerik.Windows.Controls.ChartView.RadChartBase.UpdateUICore(ChartLayoutContext context) in c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\RadChartBase.cs:line 461 at Telerik.Windows.Controls.ChartView.PresenterBase.UpdateUI(ChartLayoutContext context) in c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\Common\PresenterBase.cs:line 204 at Telerik.Windows.Controls.ChartView.RadChartBase.CallUpdateUI() in c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\RadChartBase.cs:line 1001 at Telerik.Windows.Controls.ChartView.RadChartBase.ArrangeOverride(Size finalSize) in c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\RadChartBase.cs:line 708

....

XAML:

<Grid>

<telerik:RadCartesianChart HorizontalAlignment="Left" Margin="12,12,0,0" Name="radCartesianChart1" VerticalAlignment="Top" Height="265" Width="453">

<telerik:RadCartesianChart.HorizontalAxis>

<telerik:CategoricalAxis />

</telerik:RadCartesianChart.HorizontalAxis>

<telerik:RadCartesianChart.VerticalAxis>

<telerik:LinearAxis />

</telerik:RadCartesianChart.VerticalAxis>

<telerik:BarSeries>

<telerik:BarSeries.DataPoints>

<telerik:CategoricalDataPoint Label="10" Value="10" />

<telerik:CategoricalDataPoint Label="20" Value="20" />

<telerik:CategoricalDataPoint Label="30" Value="30" />

</telerik:BarSeries.DataPoints>

</telerik:BarSeries>

</telerik:RadCartesianChart>

</Grid>

I'm using 2012.1.326.40 version of radControls

What could be the reason?

Regards,
Auvo

ChartView

answered on 17 May 2012

9 answers

267 views

[Solved] How to customize the default behavior of the RadTreeView

Hello everybody :)

My scenario is the following:

I have a TreeView with services grouped by category just like this:

Cateogory 1:

Service 1

Service 2

Category 2:

Service 3

Service 4:

And another empty TreeView. The user can drag and drop services from the "services-tree" to the "empty-tree".

I have set the IsDragDropEnable = true, and the default behavior is great but I want to customize the default behavior of the TreeView to achieve the following:

1.- When the user drag an drop successfully a service, this service should not be removed from the "service-tree".

2.- Prevent that the user drop the same service into the "empty-tree" more than once. The "empty-tree" cannot host the same item more than once.

3.- Allow that the user reorder the services on the "empty-tree", i.e. allow drag and drop for the items of the "empty-tree" before or after it current position but no inside of each other.

Can you tell me please which events I have to handle to achieve this behavior? If possible I really appreciate if you add some code snippets.

Is this possible?

I hope you can help me.

Best Regards

Jorge

TreeView

answered on 17 May 2012

10 answers

469 views

Get Caret Position to Set Location of ListBox (Autocomplete/Intellisense)

Good afternoon,

I'm trying to build my own Autocomplete (intellisense) RadRichTextBox. For the autocomplete popup I'm using your RadListView.

Grid>

<Grid.ColumnDefinitions>

<ColumnDefinition />

</Grid.ColumnDefinitions>

<telerik:RadRichTextBox x:Name="radRichTextBox" AcceptsReturn="True" Width="800" Margin="10" Grid.Column="0" DocumentContentChanged="radRichTextBox_DocumentContentChanged">

<telerik:RadRichTextBox.Effect>

<DropShadowEffect ShadowDepth="10" Color="Gray" Opacity=".4" Direction="320" RenderingBias="Performance" />

</telerik:RadRichTextBox.Effect>

<telerik:RadRichTextBox.LayoutTransform>

<ScaleTransform ScaleX="{Binding ElementName=Scale, Path=Value}" ScaleY="{Binding ElementName=Scale, Path=Value}" />

</telerik:RadRichTextBox.LayoutTransform>

<telerik:RadDocument x:Name="radDocument" />

</telerik:RadRichTextBox>

<telerik:RadListBox Width="100" Height="100">

<ListBoxItem Content="Item 1" />

<ListBoxItem Content="Item 2" />

<ListBoxItem Content="Item 3" />

<ListBoxItem Content="Item 4" />

</telerik:RadListBox>

</Grid>

Do you know how I can get the caret position and set the RadListBox position next to it / slightly offset?

Thank you very much for your time,

Rob

RichTextBox

answered on 16 May 2012

1 answer

105 views

[Solved] Export Html Tags instead of Style

We are using HtmlFormatProvider to export the content of a RichTextBox, you can set the styles to be exported Inline instead of creating classes, but, is there a way to export it on Html markup only?
<i>tag</i>
instead of
<span style="font-style: italic"> tag</span>
Thanks in advance

RichTextBox

answered on 16 May 2012

2 answers

388 views

[Solved] Reverse checkbox binding

I know this is an odd request and probably not Ideal but is there anyway to set a wpf checkbox to be checked when the binding value is false and unchecked when it is true? The checkbox is bound to a field in a database object and because of a legacy application I can't just reverse the values in the table.

General Discussions

answered on 16 May 2012

2 answers

121 views

TextMode not appears and there are strange errors in output console

Good morning,
I've followed the example provided by BreadCrumb control, but when I try to enter in TextMode text path isn't display (BreadCrumb is white).
In my output console there are two strange errors:
1) "System.Windows.Data Error: 25 : ItemTemplate and ItemTemplateSelector are not valid for item.; Type='RadBreadcrumbBarItem'"; it occurs at application startup.
2) "System.Windows.Data Error: 2 : Cannot find governing FrameworkElement or FrameworkContentElement for target element. BindingExpression:Path=(0); DataItem=null; target element is 'RotateTransform' (HashCode=36078627); target property is 'Angle' (type 'Double')"; it occurs if I try to enter in TextMode.

Could you help me?

NOTE: problems occur with dlls version 2012.1.0326.35 and also with the last nightly build 2012.1.0507.35
NOTE 2: my program is build on Framework 3.5 and I'm using telerik dll for 3.5 (but I've tested also with 4.0 but problems persist)

BreadCrumb

answered on 16 May 2012

1 answer

629 views

Setting width of RadWindow from Code

Hi

I am having issues setting the RadWindow.Alert window from Code. The method I tried is as follows:

RadWindow.Confirm(

new DialogParameters

{

Content = new ContentControl { Width = 800, Height = 600, Content = editorView },

DialogStartupLocation = WindowStartupLocation.CenterScreen,

Closed = (sender, e) => this.AddChartSeriesGroupClosed(sender, e, newChartSeriesGroup),

});

The window size using the above code seems to be 400x600 which is coincidental i.e. it is the size regardless of the Width and Height values used above. I have tried MinWidth and MinHeight as well.

Any ideas?

Window

answered on 16 May 2012

7 answers

594 views

RadGridView with VirtualQueryableCollectionView loaded via WCF problem

Hello,

I'm using WPF RadGridView which loades a large database table (about 200000 rows).
I bind the GridView to VirtualQueryableCollectionView object which makes async calls to WCF service in the ItemsLoading event.
The data from the WCF web service is, of course, retured after the VirtualQueryableCollectionView.ItemsLoading event is ended.
When the data is retured from the WCF web service I load the data to the VirtualQueryableCollectionView using the VirtualQueryableCollectionView.Load method.
The problem is when I drag the scroller, for example, to the middle of the grid it doens't show the loaded data, because the data is loaded a little later after the VirtualQueryableCollectionView.ItemsLoading is finished.
When I scroll to other point in the grid and return back to that place, the data which was loaded earliear is shown correctly.
It seems like it needs to send some notify to the GUI that the data is loaded after the VirtualQueryableCollectionView.ItemsLoading is finished (like INotifyPropertyChanged interface or something).

BTW, when I use sync WCF web service, it works correctly because the data is loaded within the VirtualQueryableCollectionView.ItemsLoading event.

How can I resolve this problem?

Thanks,
Alex Vr.

GridView

answered on 16 May 2012

3 answers

230 views

TextInput Event

Hi,

Is there any reason why the richtextbox TextInput event doesn't fire? Does it have something to do with it hosting a document?

DocumentContentChanged etc events fire. I am just wondering why TextInput doesnt?... mainly for reference purposes.

Thanks,

Rob

RichTextBox

answered on 16 May 2012

0 answers

159 views

Apply theme from resources

I've added a resource file to my WPF application and in it I have:

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
   xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
   xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation">

<Style TargetType="telerik:RadGridView" BasedOn="{StaticResource {telerik:ThemeResourceKey ThemeType=telerik:Office_BlueTheme, ElementType=telerik:RadGridView}}" />
</ResourceDictionary>

and in App.xaml I have:
<Application.Resources>
   <ResourceDictionary>
   <ResourceDictionary.MergedDictionaries>
   <ResourceDictionary Source="Dictionary1.xaml" />
   </ResourceDictionary.MergedDictionaries>
   </ResourceDictionary>
   </Application.Resources>

And in a usercontrol I've added a RadGridView; Now the group section and gridline borders are blue but the header remains black.
why the theme dosen't apply to column header?

GridView

asked on 16 May 2012