Questions on UI for WPF Forum

1 answer

402 views

I cannot display the controls in design mode

Hi guys!
I´m experiment problems to visualization of controls in my WPF project. Actually I'm working with Visual Studio 2017, but only appear a black screen.
I Attach a picture

General Discussions

answered on 06 Feb 2020

5 answers

211 views

Error columnindex after copy a row

Hi,

in my radSpreadsheet I do this actions:

- insert an empty row (insertEmptyRow.jpg)

- than copy the hole row (copyRow.jpg)

- than paste it in the first cell of the before inserted row (pasteRow.jpg)

- and than I insert an empty row again --> An Error comes up (errorColumnIndex.jpg)

From this point on my Worksheet has this 16383 columns and I can not get rid of it.

What I tried so far wars:

ControlCenter2.radSpreadsheet.Workbook.ActiveWorksheet.Columns.Remove(200, columns.Count-200);

but this had no effect, all the columns are still visible and scrollable.

When I try to delete this columns in GUI the next error occures: (delCol.jpg, errorNullRef.jpg)

Sorry for the german in pics.

Can you help?

Using telerik 2018 R2.

BR Gert

Spreadsheet

answered on 06 Feb 2020

1 answer

93 views

Reappropriating ColumnsSelectionButton

Hey guys,

I like the way the ColumnsSelectionButton looks on the right side of the group panel. Instead of using it for selection, would there be a way to easily reuse this control to show/hide the associated column?

Thanks!

GridView

answered on 06 Feb 2020

6 answers

526 views

Bad performance with grouping

Hello,

We have a performance issue with RadGridView when using telerik's grouping.

For example:

Sorting can take about 4 seconds. while sorting without grouping, lasts less then a second.

The same issue happens when clearing the ItemSource and then use AddRange of several items.

The JetBrains dotTrace shows that most of the time spent in "Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel.MeasureOverride(size)" - 2471 milliseconds. The same operation lasts 79 Milliseconds without grouping.

We defined the gridview with the following:

GroupRendererMode = "Flat"

VirtualizingPanel.IsVirtualizingWhenGrouping = "True"

VirtualizingPanel.IsVirtualizing = "True"

VirtualizingPanel.VirtualizationMode= "Recycling"

EnableRowVirtualization="True"

EnableColumnVirtualization="True"

In addition, the height and the columns width are fixed size.

We hope you can help us.
Thank you in advance.

GridView

answered on 05 Feb 2020

3 answers

403 views

Context Menu Positioning is wrong

Hi dear Telerik Team,

I have a problem with the positioning as context menu.

I would like to show the menu at mouse position. But it appears somewhere else.
See screenshot. The mouse was over the green box.
The screenshot is taken from your xaml examples.

Mouse and MousePoint have the same problem.

How can I solve this.

RadialMenu

answered on 05 Feb 2020

6 answers

263 views

Howto create image from RadMap without showing the RadMap

I use a very general image creation method to create multiple images for a report.
This method doesn't yet work with RadMap because there are unfinished animations (Zooming, ...(?)) and the OpenStreetMap data isn't loaded and shown yet

Questions:
1) Can I disable the RadMap animations and get an eventcall when the map loading and creation process is finished?
Or is there even a better way to implement it?
2) Is it possible to use something like a cache for the openStreetMap data during my report creation
3) Is it possible to use the OpenStreetMapProvider offline?

image creation method:

var outerGrid = CreateNewViewAndSetDataContextCreateViewInGrid(myDataContext);

outerGrid.Width = width;

outerGrid.Height = height;

outerGrid.Measure(new Size(width, height));

outerGrid.Arrange(new Rect(0, 0, width, height));

outerGrid.UpdateLayout();

var renderTargetBitmap = new RenderTargetBitmap(

(int)width,

(int)height,

96,

System.Windows.Media.PixelFormats.Pbgra32);

renderTargetBitmap.Render(outerGrid);

var bitmapEncoder = new PngBitmapEncoder();

bitmapEncoder.Frames.Add(BitmapFrame.Create(renderTargetBitmap));

return bitmapEncoder;

RadMap Code:

<telerik:RadMap x:Name="Map" MiniMapExpanderVisibility="Collapsed">

<telerik:RadMap.Provider>

<telerik:OpenStreetMapProvider x:Name="MapProvider"/>

</telerik:RadMap.Provider>

<telerik:VisualizationLayer x:Name="LayerInMap"/>

</telerik:RadMap>

RadMap Code Behind:

this.DataContextChanged += /* set map properties. e.g. fill visualization layer with charts */

Map

answered on 05 Feb 2020

3 answers

199 views

Setting the font

I'm running into the following issue with RadRichTextBox and the RadRichTextBoxRibbonUI. I have a simple xaml file with just a RadRichTextBoxRibbonUI and a RadRichTextBox. I run the app and type some text in the RadRichTextBox editor. It shows up in the font displayed in the RadRichTextBoxRibbonUI. The problem occurs if I want to change the font of subsequent text. If I go to the font control and change the font, the font control retains focus. If I click back into the RadRichTextBox control to type some text, the font reverts to the font currently in the control and Ignores the font that I had selected in the font control. For comparison, when I do the same thing in MS Word, the editor retains focus so that after you've changed the font you can just start typing and the new text is displayed in the newly selected font. Is there a way to get this behaviour with RadRichTextBoxRibbonUI and RadRichTextBox?

Thanks for your attention,

George

RichTextBox

answered on 05 Feb 2020

1 answer

136 views

TypeOver mode

Can someone please inform me how you can set this type of control either in xaml or code behind to be in TypeOver mode rather than Insert mode?

I have searched the web and can't seem to find anything...

MaskedInput (Numeric, DateTime, Text, Currency)

answered on 05 Feb 2020

6 answers

270 views

RadToolbarTray.ItemsSource

Hello,

I am binding the ItemsSource of a RadToolbarTray to a ViewModel property to create one or more toolbars dynamically via the following.

<telerik:RadToolBarTray telerikQuickStart:ThemeAwareBackgroundBehavior.IsEnabled="True"

ItemsSource="{Binding MergedToolbarCommands}"

x:Name="ToolbarTray">

<telerik:RadToolBarTray.ItemTemplate>

<DataTemplate>

<telerik:RadToolBar ItemsSource="{Binding}"

OverflowMode="AsNeeded">

<telerik:RadToolBar.ItemContainerStyle>

<Style TargetType="{x:Type ContentPresenter}">

<Setter Property="ToolBar.OverflowMode" Value="Never" />

</Style>

</telerik:RadToolBar.ItemContainerStyle>

</telerik:RadToolBar>

</DataTemplate>

</telerik:RadToolBarTray.ItemTemplate>

</telerik:RadToolBarTray>

Unfortunately, the ToolbarTray is not displayed. When I inspect it with Snoop, I notice that all my Toolbars have their DataContexts set correctly and Snoop correctly renders each one individually, but the RadToolbarTray measures itself to have zero height, so it is not displayed. How do I get The RadToolbarTray to measure itself correctly?

Cheers,

Mike

ToolBar

answered on 04 Feb 2020

10 answers

304 views

IsExpanded overrides binding on initialization

I have databound RadTreeViewItem.IsExpanded in my item container style, but when the item is created, it ignores the binding (which is set to true) and sets the property to false. I found another thread in the forum describing the same behavior happening with the IsChecked property.

Call stack:

Telerik.Windows.Controls.Navigation.dll!Telerik.Windows.Controls.RadTreeViewItem.IsExpanded.set(bool value) Line 390 C#
> Telerik.Windows.Controls.Navigation.dll!Telerik.Windows.Controls.RadTreeViewItem.OnIsExpandedChanged(bool oldValue, bool newValue) Line 1186 C#
Telerik.Windows.Controls.Navigation.dll!Telerik.Windows.Controls.RadTreeView.RestoreContainerProperties(object item, Telerik.Windows.Controls.RadTreeViewItem treeViewItem) Line 678 C#

TreeView

answered on 04 Feb 2020