Questions on UI for WPF Forum

2 answers

190 views

RadColorPicker supporting RadColorEditor? Why 2 controls?

I was hoping the RadColorPicker would have built in functionality to support the RadColorEditor which is common in just about all applications from Adobe to MS Paint ... something like the attached image.

Telerik doesn't seem to provide a "one stop shop" for this functionality. My expectation was the RadColorPicker would include the functionaltiy of the RadColorEditor, but it does not.

I can code my own solution using a new RadWindow and adding the RadColorEditor but the reason I bought Telerik is so that I wouldn't have to do this work, part of the rapid application development process.

Am I missing some simple functionality available in the RadColorPicker or is this just how it is?

Cheers, Rob.

ColorPicker

answered on 11 Nov 2020

2 answers

517 views

Binding to Slider SelectionStart and SelectionEnd not working?

I read many threads on this issue and I'm just trying to do simple XAML only binding and not MVVM or code behind, but unfortunately I can't get it to work with RadSlider:

<TextBox Grid.Row="5" Grid.Column="4" Text="{Binding ElementName=slHeightRange,Path=SelectionStart}" HorizontalAlignment="Right" />

<telerik:RadSlider x:Name="slHeightRange" Grid.Row="5" Grid.Column="5" Grid.ColumnSpan="1" Minimum="1" Maximum="50" HandlesVisibility="Visible" TickFrequency="5" TickPlacement="BottomRight" IsSelectionRangeEnabled="True">

<telerik:RadSlider.Thumbs>

<telerik:RangeSliderThumb RangeStart="5" RangeEnd="19"/>

</telerik:RadSlider.Thumbs>

</telerik:RadSlider>

<telerik:Label Grid.Row="5" Grid.Column="6" Content="{Binding ElementName=slHeightRange,Path=SelectionEnd}" HorizontalAlignment="Right" />

Any hints?

Cheers, Rob.

Slider

answered on 11 Nov 2020

4 answers

1.9K+ views

When is RadGridView actually loaded?

Hi, in my WPF application I display a large grid with data using RadGridView.
The grid is relatively large, about 150 columns x 750 rows, so after it is loaded I set a layout (sorting, some row filters and hide some columns).

I use the RadGridView.Loaded-event to trigger the layout adjustments.

The first time I open the grid after starting the application, the layout is not applied when opening the grid - because the grid is empty eventhough the Loaded-event was fired. From the second time opening the grid and onwards, the grid have data and the layout is applied.

The Loaded-event seem not to guarantee that the grid is done loaded. Are there other ways to make sure the RadGridView has loaded all data and is ready for manipulation?

It also takes notably longer time to open it the first time after starting the application, making me to believe that the application loads DLLs etc, could that have any relation?

I've tried the other events available for RadGridView (https://docs.telerik.com/devtools/wpf/controls/radgridview/events/overview#radgridview), but the result is the same.
Im using 2020.1 version.

GridView

answered on 10 Nov 2020

1 answer

128 views

Sample code is wrong.

FYI

https://docs.telerik.com/devtools/wpf/controls/radimageeditor/getting-started

In example 3 your trying to pass a RadImageEditor control into a sub that uses RadImageEditorUI. If you change to the following it works:

Public Shared Sub LoadSampleImage(ByVal imageEditor As RadImageEditor, ByVal image As String)

Using stream As Stream = Application.GetResourceStream(GetResourceUri(SampleImageFolder & image)).Stream

imageEditor.Image = New Telerik.Windows.Media.Imaging.RadBitmap(stream)

imageEditor.ApplyTemplate()

imageEditor.ScaleFactor = 0

End Using

End Sub

ImageEditor

answered on 10 Nov 2020

2 answers

190 views

Why does IsPinned need TwoWay binding?

Hello,

it seems that having a RadPane with a binding for its IsPinned property needs to bound with Mode=TwoWay for it to work. Why is this? The problem comes more apparent when I'm using (in the real application) binding to a ViewModel that gets converted through a (Multi)ValueConverter. If I have to have the binding mode be TwoWay I have to implement the ConvertBack method of IValueConverter and have it return something like null, even though I only want the model converted one way. I absolutely do not want the pinned/unpinned status of the RadPane having any influence on my model.

Also, it seems the ConvertBack is only called once at the start of the program or when the actual pin/unpin icon is pressed. And this is very bad when we have the TextBox binding. If I write a string longer than 5 characters into it, the pane opens. If I then unpin the pane, the TextBox is cleared because the converter returns null!

Below is a repro of the problem, standard WPF .NET 4.7.2 project with only the Telerik nugets added. Clicking the checkbox Pane 1 does nothing. The checkbox Pane 2 pins/unpins Pane 2 because it is bound with Mode=TwoWay. The same can be seen with the textbox. When typing a string more than 5 characters in length, the last pane opens if the binding mode is TwoWay.

My MainWindow.xaml

01.<Window x:Class="TelerikDockingIsPinned.MainWindow"

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

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

04. xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

05. xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

06. xmlns:local="clr-namespace:TelerikDockingIsPinned"

07. xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"

08. mc:Ignorable="d"

09. Title="MainWindow" Height="450" Width="800">

10.

11. <Window.Resources>

12. <local:TextLengthConverter x:Key="TextLenConverter" />

13. </Window.Resources>

14.

15. <Grid>

16. <Grid.RowDefinitions>

17. <RowDefinition Height="Auto"/>

18. <RowDefinition Height="*"/>

19. </Grid.RowDefinitions>

20.

21. <StackPanel Orientation="Horizontal">

22. <CheckBox x:Name="Pane1Pinned" Content="Pane 1"/>

23. <CheckBox x:Name="Pane2Pinned" Content="Pane 2"/>

24. <TextBox x:Name="Pane3Pinned" MinWidth="100"/>

25. </StackPanel>

26.

27. <telerik:RadDocking Grid.Row="1">

28. <telerik:RadSplitContainer>

29. <telerik:RadPaneGroup>

30. <telerik:RadPane Header="Pane 1" IsPinned="{Binding ElementName=Pane1Pinned, Path=IsChecked}"/>

31. <telerik:RadPane Header="Pane 2" IsPinned="{Binding ElementName=Pane2Pinned, Path=IsChecked, Mode=TwoWay}"/>

32. <telerik:RadPane Header="Pane 3" IsPinned="{Binding ElementName=Pane3Pinned, Path=Text, Converter={StaticResource TextLenConverter}, Mode=TwoWay}"/>

33. </telerik:RadPaneGroup>

34. </telerik:RadSplitContainer>

35. </telerik:RadDocking>

36. </Grid>

37.</Window>

and the converter:

01.using System;

02.using System.Globalization;

03.using System.Windows.Data;

04.

05.namespace TelerikDockingIsPinned {

06. class TextLengthConverter : IValueConverter {

07. public object Convert(object value, Type targetType, object parameter, CultureInfo culture) {

08. return (value is string) && ((string)value).Length > 5;

09. }

10.

11. public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) {

12. Console.WriteLine("ConvertBack called");

13.

14. return null;

15. }

16. }

17.}

Docking

answered on 10 Nov 2020

1 answer

222 views

Missing Icon for Child Items

Hi all,

Is it possible to display icons for child items of a navigation view in a data-bound hierarchy scenario? I'm following the documentation at https://docs.telerik.com/devtools/wpf/controls/radnavigationview/populating-with-data/hierarchical-databinding but also in this example the icons are missing for child items (even if them are defined in the example data model).

Thanks.

NavigationView (Hamburger Menu)

answered on 09 Nov 2020

4 answers

295 views

How to bind the TaskBoardCardModel sorting order?

After trying the First Look exemple code, there is something I did not find.

If we want to store the control content to a database or any data storage, we can look at the DataContext.Data to get back all the cards.
State property is well corresponding to the new column for exemple.

But how to know in which orders they are now sorted. There is no "Order" / "Index" / "Position" property we can bind ?

Without this info it is difficult to redraw later the same board in the same state.

Is there a way to get this information

Thanks

TaskBoard

answered on 09 Nov 2020

1 answer

95 views

Initial loading Performance - Focus Managment (?)

Hi,

we are currently tweaking the initial loading performance of a RadDiagram with >1000 Shapes and >5000 Connections. According to the attached DotTrace profiler run, we are spending a good amount of time (~5 seconds) within the function "UpdateFocusedElement" which intuitively seems unnecessary during the initial load of a diagram.

Would you agree that this call is unnecessary during initial load and if so could you suggest a way to temporarily suppress or work around this to improve loading time?

Thanks in advance!

Regards

Diagram

answered on 09 Nov 2020

2 answers

306 views

RadGlyph Custom Font Designer Error

I'm using RadGlyph with the FontAwesome library and it works great. I register the font in my App.xaml - OnStartup and when I run my application the icons load correctly and look crisp and clear.

The issue is in the Visual Studio designer RadGlyph complains constantly that the 'Font family FontAwsome is not registered'. This breaks parts of the UI designer and add these errors to the Error List make it look a lot worse than it is and makes finding real errors harder.

My question is, how do I register the custom font in away that RadGlyph can detect it in the designer or can I turn off the detection of this error altogether? I don't need to see the icon in the designer I just want to clean up the error messages.

Thanks,

Richard

General Discussions

answered on 09 Nov 2020

8 answers

171 views

Wrong RootCompass indicators location

Hello everyone.

I have shell WinForms application that hosts WPF User Control contains RadDocking. When I drag RadPane, a RootCompass indicators of RadDocking shows in wrong location (see attachment). It looks like indicators shows without offset of embedded WPF Control relatively shell WinForms application.

Is it bug? Or maybe is there a way to change a location of RootCompass indicators?

Thank you.

Docking

answered on 06 Nov 2020