Questions on UI for WPF Forum

1 answer

88 views

RadRichTextBox - Spelling Check not checking Hyperlinks

We are using default Telerik Spell Check in our Rad RichTextBox.

We found that Spellcheck is not checking Hyperlinks Text.

Is there any way to make spellcheck work for the hyperlinks?

RichTextBox

answered on 12 Dec 2014

3 answers

170 views

Attempting to drag between RadTreeView and RadListBox

Hey all.

So I'm in the middle of evaluating the RadTreeView control, and so far, it leaps ahead of other controls I've evaluated. I'm exploring the Drag/Drop functionality at the moment, but am really struggling, as I've not been able to find a consistent approach to tackle the problem in the online documentation.

I've basically got a RadTreeView and a RadListBox, each of their viewmodels have an ObservableCollection of HierachicalData. I can drag within the control, and between like controls (RadListBox to RadListBox), but can't get it working between the two.

I've attached my solution - when dragging from the TreeView, you can see the drop indicator on the ListBox, but drop is disabled.

My tree view looks like this :

<telerik:RadTreeView x:Name="TreeView" Grid.Row="1"

ItemsSource="{Binding Items}" ItemTemplate="{StaticResource ParentTemplate}"

SelectionMode="Multiple" SelectedItem="{Binding SelectedItem, Mode=TwoWay}"

IsDragDropEnabled="True" AllowDrop="False" >

<telerik:RadTreeView.ItemContainerStyle>

<Style TargetType="telerik:RadTreeViewItem">

<Setter Property="IsSelected" Value="{Binding Path=Select, Mode=TwoWay}" />

<Setter Property="IsExpanded" Value="{Binding Path=Expand, Mode=TwoWay}"></Setter>

</Style >

</telerik:RadTreeView.ItemContainerStyle>

</telerik:RadTreeView>

.. with the following VM ...

public class TelerikTreeViewModel : ReactiveScreen

{

private ObservableCollection<HierachicalData> _items;

private HierachicalData _selectedItem;

public TelerikTreeViewModel()

{

DisplayName = "Telerik Tree";

Items = new ObservableCollection<HierachicalData>

{

new HierachicalData

{

Name = "Parent", Expand = true, Select = true,

Children = new ObservableCollection<HierachicalData>

{

new HierachicalData {Name = "Child 1"},

new HierachicalData {Name = "Child 2", Select = true}

}

},

new HierachicalData

{

Name = "Parent 2",Expand = true,

Children = new ObservableCollection<HierachicalData>

{

new HierachicalData {Name = "Child 12", Select= true},

new HierachicalData {Name = "Child 22"}

}

};

}

public ObservableCollection<HierachicalData> Items

{

get { return _items; }

set { this.RaiseAndSetIfChanged(ref _items, value); }

}

public HierachicalData SelectedItem

{

get { return _selectedItem; }

set { this.RaiseAndSetIfChanged(ref _selectedItem, value); }

}

public class HierachicalData : ReactiveObject

{

private string _name;

private ObservableCollection<HierachicalData> _children;

private bool _isSelected;

private bool _expand;

public HierachicalData()

{

}

public string Name

{

get { return _name; }

set { this.RaiseAndSetIfChanged(ref _name, value); }

}

public ObservableCollection<HierachicalData> Children

{

get { return _children; }

set { this.RaiseAndSetIfChanged(ref _children, value); }

}

public bool Select

{

get { return _isSelected; }

set

{

this.RaiseAndSetIfChanged(ref _isSelected, value);

}

public bool Expand

{

get { return _expand; }

set { this.RaiseAndSetIfChanged(ref _expand, value); }

}

And my RadListBox looks like this

<Style x:Key="DraggableListBoxItem" TargetType="telerik:RadListBoxItem">

<Setter Property="telerik:DragDropManager.AllowCapturedDrag" Value="True"/>

<Setter Property="telerik:DragDropManager.AllowDrag" Value="True" />

<Setter Property="telerik:DragDropManager.TouchDragTrigger" Value="TapAndHold"/>

</Style>

<telerik:RadListBox x:Name="ListBox" ItemsSource="{Binding Items}"

ItemTemplate="{StaticResource ListBoxItemDataTemplate}"

ItemContainerStyle="{StaticResource DraggableListBoxItem}"

>

<telerik:RadListBox.DragDropBehavior>

<telerik:ListBoxDragDropBehavior/>

</telerik:RadListBox.DragDropBehavior>

<telerik:RadListBox.DragVisualProvider>

<telerik:ScreenshotDragVisualProvider />

</telerik:RadListBox.DragVisualProvider>

<telerik:RadListBox.DropVisualProvider>

<telerik:LinearDropVisualProvider />

</telerik:RadListBox.DropVisualProvider>

</telerik:RadListBox>

With the following VM :

public class DataItemDropViewModel : ReactiveScreen

{

public DataItemDropViewModel()

{

Items = new ObservableCollection<HierachicalData>

{

new HierachicalData{Name = "Hello"},

new HierachicalData{Name = "Hello2"},

new HierachicalData{Name = "Hello3"},

};

}

private ObservableCollection<HierachicalData> _items;

public ObservableCollection<HierachicalData> Items

{

get { return _items; }

set { this.RaiseAndSetIfChanged(ref _items, value); }

}

These exist in seperate user controls, with their own viewmodels. There is no code behind as I'm attempting to leverage as much of the existing framework as possiblle. I'm using the following version of the Telerik dlls 2014.2.729.45

DragAndDrop

answered on 12 Dec 2014

3 answers

164 views

RadGridView hide groups with 0 items

Hi Telerik Team,

I'm using a RadGridView with a group descriptor to categorize items belonging to the same group:

<telerik:RadGridView.GroupDescriptors>
<telerik:GroupDescriptor Member="GroupData.Name" />
</telerik:RadGridView.GroupDescriptors>

The problem is that, in order to initialize the application, I needed to define a Dummy group that contains 0 items. The dummy group gets removed once the user makes a selection on the actual groups he wants to analyze.
I don't want the Dummy group to be shown in the grid when the application is loaded. Is there a way to hide it?

Thanks,
Valerio

GridView

answered on 12 Dec 2014

14 answers

699 views

[Solved] Multiple Column Header

Does gridview support a way to have a header over multiple columns? For example, I have 3 columns, History Week 1, History Week 2, History Week 3. Is it possible to have another header over these three columns (grouped together) that says History?

GridView

answered on 12 Dec 2014

1 answer

148 views

Nullable Datetime Column & Binding/Validation Error with editing empty column

I've got a Nullable Datetime GridViewDataColumn, and if I follow the following steps I'm getting a validation/binding error:

1) Start with a blank column
2) Double-click the column to activate editing but don't type anything, or if you type anything, delete it.
3) Click on any other part of the grid

Validation Error: Object of type System.String cannot be converted to System.Nullable [System.DateTime]

If I start with a column that has data in it and delete it, things work fine. But if I start to edit an empty field and try to leave it while it is still empty, I get this error.
Once the error is up, you can't seem to do anything on the grid until you hit the ESC key, which is confusing our users.

Is something I can do so that leaving the column while it is still empty will be validated properly? This shouldn't be creating a validation problem with a Nullable DateTime.

Thanks.

GridView

answered on 12 Dec 2014

3 answers

514 views

RadGridView CellEditTemplate and CellValidating

I am using a GridView with a CellEditTemplate to display a DatePicker with the date selection mode set to "Month". However this then meant that the CellValidation's event argument e.NewValue didn't contain the value selected by the user; rather it contained a minimum date value (#12:00:00am#).

After sifting through numerous articles searching for a resolution to this problem - the majority in this forum which referred to creating custom validation procedures and deriving new column types and another explaining the Validation Lifecycle that gave absolutely no information on cell validating using editing templates (and none that gave any examples) - I finally came across this article http://www.telerik.com/forums/custom-template-in-grid that explained you simply had to use "e.EditingElement" to gain access to the editor used in the cell.

I am raising this thread in the hope that other users will be able to quickly locate the solution to this problem and not waste hours of their time.

GridView

answered on 12 Dec 2014

1 answer

134 views

Tabstrip in separate container

Is it possible to have the tabstrip in a separate container from the content? I'd like the tabs to be in a grid located in one area of my application. I would then like the content to show up in a separate grid in a different location.

Thanks for the help!

TabControl

answered on 12 Dec 2014

4 answers

314 views

Placing multiple graphs in same diagram

Hi,

We need to display a dynamic tree with multiple levels as showed in attached image. Levels needs to be left aligned and will be separate from main. Both the trees will be generated dynamically, and should display with the tree layout.

I am able to generate both the graphs with no issues, but not able to place both in same graph as it supports only one. I tried to place both the graphs in two separate graphs in a grid with two columns and tried to synchronize the zoom, but that is getting distorted and overlapped.

Any way to place both the graphs in same diagram, but one with fixed value for x (as shown in the diagram) ?

Any advice/support is much appreciated.

Thanks,
Shalvin.

Diagram

answered on 12 Dec 2014

3 answers

214 views

Printing diagrams

Hi all

I want to print a diagram with preview. I used the example at http://www.telerik.com/help/wpf/raddiagram-features-printing.html and my code looks like this:

var printPreviewWindow = new RadWindow();
var printPreview = new RadDiagramPrintPreview { Diagram = this.diagram };
printPreviewWindow.Content = printPreview;
printPreviewWindow.ResizeMode = ResizeMode.NoResize;
printPreviewWindow.Width = 800;
printPreviewWindow.Height = 600;
printPreviewWindow.ShowDialog();
With the RadDiagramPrintPreview the user can change printer and sheet size / orientation. But I need to scale the diagram down to "fit to page"
How can I do this with the RadDiagramPrintPreview?

Regards

Dan Ove

Diagram

answered on 12 Dec 2014

7 answers

339 views

in CellValidating, e.NewValue is null, on add

I have a RadGridView, with a CellValidating event handler.

It receives a GridVIewCellValidatingEventArgs argument, named e.

e has a field, newValue.

When I'm editing a cell, whether on an existing row or on a new one, the CellValidating event fires, and my event handler catches it.

When I'm editing a cell in an existing row, I can access the object being edited via e.newValue.

When I'm editing a cell in a new row, e.newValue is null.

Is this supposed to happen? If so, what should I use instead of e.newValue?

GridView

answered on 12 Dec 2014