Questions on UI for WPF Forum

1 answer

912 views

Disable context menu

Hi dear Telerik Team,

On right clicking I want to open a radial menu. But the standard context menu appears.

How can I disable the context menu and replace by the radial menu?

Thank you.

AutoCompleteBox

answered on 29 Jan 2020

1 answer

208 views

How-to reset state of RadMap control?

Our application has to display various different map background layers. We use both MercatorProjection and EPSG900913Projection depending on which map we are displaying. Furthermore we use EPSG900913Projection to display data from an image file, using a custom provider derived from UriImageProvider. For this scenario we need to be able to set a maximum zoom level of 30. When switching between different map backgrounds we try to reset the state of the map control. These are the steps we take to try and do this:

//Workaround for modern client crash when disposing telerik control (switching between maps)

//http://www.telerik.com/forums/application-crashes-after-radmap-is-disposed

if (RadMap?.Items?.Count > 0)

{

foreach (var radMapItem in RadMap.Items)

{

var visualizationLayer = radMapItem as VisualizationLayer;

visualizationLayer?.Items?.Clear();

}

DetachRadMapHandlers();

DetachViewModelHandlers(_viewModel);

DisposeMapLayers();

// Reset state of RadMap

RadMap.ItemsSource = null;

foreach (var provider in RadMap.Providers)

{

provider.Dispose();

}

RadMap.Provider = null;

RadMap.Providers.RemoveAll();;

// if we're re-using this control we must change the min/max zoom before changing spatial reference

RadMap.MinZoomLevel = MapConstants.DefaultMapMinZoomLevel;

RadMap.MaxZoomLevel = MapConstants.DefaultMapMaxZoomLevel;

_defaultMinZoomLevel = MapConstants.DefaultMapMinZoomLevel;

_defaultMaxZoomLevel = MapConstants.DefaultMapMaxZoomLevel;

// we need to set the zoom level to a value in the allowable zoom range

// before assigning another background

RadMap.ZoomLevel = MapConstants.DefaultMapMinZoomLevel;

RadMap.SpatialReference = new MercatorProjection();

MiniMap.SpatialReference = new MercatorProjection();

RadMap.GeoBounds = new LocationRect();

RadMap.Center = new Location();

RadMap.GeoBoundsNW = Location.Empty;

RadMap.GeoBoundsSE = Location.Empty;

Unfortunately this doesn't always seem to work. In particular I notice that this does not set the GeographicalBounds back the the initial state (I don't know if this is significant). It won't be easy to create a sample app to try and isolate this problem but if you have any suggestions on how better to restore the map control to it's initial state I'd appreciate it.

Thanks

Pete

Map

answered on 29 Jan 2020

1 answer

358 views

How to disable the already scheduled dates in the calendar control in start time of RadSheduleView

Hi,

I am using RadScheduleView in a WPF application. I have a requirement where if an appointment is scheduled from 10.00-11.00 , the next time when I click on scheduler control to schedule an appointment, the calendar corresponding to start time and end time should have the 10.00 and 11.00 in disabled state.

How can I achieve that?

Thanks,

Divya

General Discussions

answered on 28 Jan 2020

1 answer

97 views

Run the Apply method for CustomMapping during runtime

I would like to know how to get my CustomMapping to run the Apply method. I have a list of animals and the speed of the animals should control the colour of the treemapitem. However when the animals speed changes then the treemap tiles don't change colour but on startup the colours visible. They just never change. When the animals size changes the tiles do reflect the changes. How do I run the Apply method?

<telerik:RadTreeMap x:Name="treeMap" ItemsSource="{Binding TreeMapList}" LayoutStrategy="Squarified">

<telerik:RadTreeMap.TypeDefinitions>

<telerik:TypeDefinition TargetTypeName="TreeMapItem"

ValuePath="AnimalSize"

LabelPath="Animal"

ToolTipPath="ToolTip">

<telerik:TypeDefinition.Mappings>

<local:ValueColourMapping MinValue="{Binding MinCurrentSpeed}" MaxValue="{Binding MaxCurrentSpeed}" Field="CurrentSpeed" />

</telerik:TypeDefinition.Mappings>

</telerik:TypeDefinition>

</telerik:RadTreeMap.TypeDefinitions>

</telerik:RadTreeMap>

TreeMap and PivotMap

answered on 27 Jan 2020

1 answer

386 views

Set window behind main screen

Hi All,

I am using radwindow as a child window in my application. Programatically I am trying to set child window behind main window.Window state 'Minimized' minimizes window so doesn't help.

How to set child window behind main window and vice versa without changing window state?

Any help would be appreciated.

Regards,

Prashant

Window

answered on 24 Jan 2020

3 answers

301 views

RadRichTextBox ImageMiniToolBar tooltips not showing correctly

Hi, I have a radRichTextBox, and when I click on an image the ImageMiniToolBar appears but it has nondescript tooltips like System.Windows.Controls.TextBlock. Is there a way to specify each button tooltip?

RichTextBox

answered on 24 Jan 2020

0 answers

201 views

DragDropManager.AddDropHandler not working for ItemsControl

Hi,

DragDropManager.AddDropHandler not working for ItemsControl,

Here is my code. I also attached a sample project.

VIEW

<Window x:Class="DragDropExample.MainWindow"

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

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

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

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

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

        mc:Ignorable="d"

        Title="MainWindow"

        Height="500"

        Width="800">

    <Grid>

        <Grid.ColumnDefinitions>

            <ColumnDefinition />

            <ColumnDefinition />

            <ColumnDefinition />

        </Grid.ColumnDefinitions>



        <StackPanel Orientation="Vertical"

                    Margin="10">

            <TextBlock Text="SOURCE"

                       FontWeight="Bold" />



            <ItemsControl Name="Source"

                          VerticalAlignment="Stretch"

                          Height="400"

                          BorderBrush="Red"

                          BorderThickness="1">

                

                <Button  Content="DRAG ME"

                         Margin="10"

                         Width="100"

                         telerik:DragDropManager.AllowCapturedDrag="True" />



                <Button  Content="DRAG ME 1"

                         Margin="10"

                         Width="100"

                         telerik:DragDropManager.AllowCapturedDrag="True" />

            </ItemsControl>

        </StackPanel>



        <StackPanel  Grid.Column="1"

                     Margin="10"

                     Orientation="Vertical">

            <TextBlock Text="This is ItemsControl. NOT WORKING"

                       FontWeight="Bold" />

            <ItemsControl    Name="TargetItemsControl"

                             AllowDrop="True"

                             Height="400"

                             BorderBrush="Blue"

                             BorderThickness="1"

                             VerticalAlignment="Stretch" />

        </StackPanel>



        <StackPanel Grid.Column="2"

                    Margin="10"

                    Orientation="Vertical">

            <TextBlock Text="This is LlistBox. WORKING"

                       FontWeight="Bold" />



            <ListBox    Name="TargetListBox"

                        AllowDrop="True"

                        Height="400"

                        VerticalAlignment="Stretch"

                        BorderBrush="Blue"

                        BorderThickness="1"

                        Grid.Column="2" />

        </StackPanel>



    </Grid>

</Window>

CODE

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using Telerik.Windows.DragDrop;

namespace DragDropExample
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
DragDropManager.AddDragInitializeHandler(Source, OnDragInitialize);
DragDropManager.AddGiveFeedbackHandler(Source, OnGiveFeedback);
DragDropManager.AddDropHandler(TargetItemsControl, OnDrop);
DragDropManager.AddDropHandler(TargetListBox, OnDrop);
}
private void OnDragInitialize(object sender, DragInitializeEventArgs args)
{
FrameworkElement source = sender as FrameworkElement;

args.AllowedEffects = DragDropEffects.All;
var payload = DragDropPayloadManager.GeneratePayload(null);
var data = ((Button)args.OriginalSource).Content;
payload.SetData("DragData", data);
args.Data = payload;
args.DragVisual = new ContentControl { Content = data };
}

private void OnGiveFeedback(object sender, Telerik.Windows.DragDrop.GiveFeedbackEventArgs args)
{
args.SetCursor(Cursors.Arrow);
args.Handled = true;
}

private void OnDrop(object sender, Telerik.Windows.DragDrop.DragEventArgs e)
{
var data = ((DataObject)e.Data).GetData("DragData") as string;

if (sender.GetType() == typeof(ListBox))
{
TargetListBox.Items.Add(data);
}
else if (sender.GetType() == typeof(ItemsControl))
{
TargetItemsControl.Items.Add(data);
}
}
}
}

DragAndDrop

asked on 24 Jan 2020

3 answers

146 views

Full text search operator is not working

According to your article:

https://docs.telerik.com/devtools/wpf/controls/radgridview/features/search-as-you-type#modifying-the-searching-criteria

E.g. I want to search for RIO + CED but the "+" operator is not working. Please see attached pic (plus.jpg)!

Or how can I check that the system is set up well?

I tried already to change the culture code from the UIThread because we use it to change localization, no change.

By the way the quotes operator is working.(quotes.jpg)

Use telerik 2018.2.515.45

Thanks for your help!!

PR Gert

GridView

answered on 24 Jan 2020

5 answers

63 views

Pin RadPane causes Index out of range error

Hello,

I have a WPF project where I am using RadDocking with 3 RadPaneGroups. I get an Index out of range error when I pin and then try to unpin a pane or if I try to pin a second item. I am able to set the pane to floatable/dockable and manipulate them that way, but when I try to unpin I get the error. I'd like to note we are targeting framework .Net Core 3.1.

Error Message:

System.ArgumentOutOfRangeException: 'Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index')'

This exception was originally thrown at this call stack:
System.ThrowHelper.ThrowArgumentOutOfRange_IndexException()
Telerik.Windows.Controls.RadTabControl.RaiseIsSelectedChangedAutomationEvent(System.Windows.DependencyObject, bool)
Telerik.Windows.Controls.RadTabItem.OnIsSelectedChanged(bool, bool)
Telerik.Windows.Controls.RadTabItem.OnIsSelectedPropertyChanged(System.Windows.DependencyObject, System.Windows.DependencyPropertyChangedEventArgs)
System.Windows.DependencyObject.OnPropertyChanged(System.Windows.DependencyPropertyChangedEventArgs)
System.Windows.FrameworkElement.OnPropertyChanged(System.Windows.DependencyPropertyChangedEventArgs)
System.Windows.DependencyObject.NotifyPropertyChange(System.Windows.DependencyPropertyChangedEventArgs)
System.Windows.DependencyObject.UpdateEffectiveValue(System.Windows.EntryIndex, System.Windows.DependencyProperty, System.Windows.PropertyMetadata, System.Windows.EffectiveValueEntry, ref System.Windows.EffectiveValueEntry, bool, bool, System.Windows.OperationType)
System.Windows.DependencyObject.SetValueCommon(System.Windows.DependencyProperty, object, System.Windows.PropertyMetadata, bool, bool, System.Windows.OperationType, bool)
...
[Call Stack Truncated]

Here is my XAML:

01.<telerik:RadDocking Grid.Row="3" BorderThickness="0" HasDocumentHost="False" RetainPaneSizeMode="DockingAndFloating" CanAutoHideAreaExceedScreen="True">

02. <telerik:RadSplitContainer Orientation="Horizontal">

03. 

04. <telerik:RadPaneGroup>

05. <telerik:RadPane Header="My Queries" CanUserClose="True" >

06. <StackPanel>

07. <Border>

08. <StackPanel>

09. <TextBlock Text="Query Results" />

10. </StackPanel>

11. </Border>

12. </StackPanel>

13. </telerik:RadPane>

14. </telerik:RadPaneGroup>

15.

16. 

17. <telerik:RadPaneGroup>

18. <telerik:RadPane Header="Summary" CanUserClose="True" >

19. <StackPanel Margin="3">

20. <TextBlock Text="View Summary" />

21. </StackPanel>

22. </telerik:RadPane>

23. </telerik:RadPaneGroup>

24.

25. 

26. <telerik:RadPaneGroup>

27. <telerik:RadPane Header="Torque Charts" CanUserClose="True" >

28. <StackPanel Margin="3">

29. <TextBlock Text="View Torque Charts" />

30. </StackPanel>

31. </telerik:RadPane>

32. </telerik:RadPaneGroup>

33.

34. </telerik:RadSplitContainer>

35. </telerik:RadDocking>

Docking

answered on 23 Jan 2020

1 answer

71 views

Exception in RadCalendar: WeakReferenceList`1 - IndexOf

Hi all!

I have an event which triggers an async loading task in which I change data which is bound to the RadCalendar.

In my development environment I never had any issues but users on RDS-Server have. This is the stack-trace from there log:

ERROR2020-01-20 11:25:28 – Fatal Error - StackTrace: ModuleContainerManager - HandleUnhandledException

WeakReferenceList`1 - IndexOf

WeakReferenceList`1 - Remove

SelectionChanger`1 - Select

SelectionChanger`1 - InsertItem

Collection`1 - Add

SelectionChanger`1 - AddJustThis

RadCalendar - AddToSelection

RadCalendar - OnSelectedDateChanged

DependencyObject - OnPropertyChanged

FrameworkElement - OnPropertyChanged

DependencyObject - NotifyPropertyChange

DependencyObject - UpdateEffectiveValue

DependencyObject - InvalidateProperty

BindingExpressionBase - Invalidate

BindingExpression - TransferValue

BindingExpression - ScheduleTransfer

ClrBindingWorker - NewValueAvailable

PropertyPathWorker - UpdateSourceValueState

PropertyPathWorker - OnDependencyPropertyChanged

ClrBindingWorker - OnSourceInvalidation

BindingExpression - HandlePropertyInvalidation

BindingExpressionBase - OnPropertyInvalidation

BindingExpression - OnPropertyInvalidation

DependentList - InvalidateDependents

DependencyObject - NotifyPropertyChange

DependencyObject - UpdateEffectiveValue

DependencyObject - SetValueCommon

DependencyObject - SetCurrentValue

RadDateTimePicker - OnSelectedValueChanged

DependencyObject - OnPropertyChanged

FrameworkElement - OnPropertyChanged

DependencyObject - NotifyPropertyChange

DependencyObject - UpdateEffectiveValue

DependencyObject - InvalidateProperty

BindingExpressionBase - Invalidate

BindingExpression - TransferValue

BindingExpression - ScheduleTransfer

ClrBindingWorker - NewValueAvailable

PropertyPathWorker - UpdateSourceValueState

PropertyPathWorker - RefreshValue

ClrBindingWorker - ScheduleTransferOperation

DataBindOperation - Invoke

DataBindEngine - ProcessCrossThreadRequests

ExceptionWrapper - InternalRealCall

ExceptionWrapper - TryCatchWhen

DispatcherOperation - InvokeImpl

DispatcherOperation - InvokeInSecurityContext

CulturePreservingExecutionContext - CallbackWrapper

ExecutionContext - RunInternal

ExecutionContext - Run

CulturePreservingExecutionContext - Run

DispatcherOperation - Invoke

Dispatcher - ProcessQueue

Dispatcher - WndProcHook

HwndWrapper - WndProc

HwndSubclass - DispatcherCallbackOperation

ExceptionWrapper - InternalRealCall

ExceptionWrapper - TryCatchWhen

Dispatcher - LegacyInvokeImpl

HwndSubclass - SubclassWndProc

nsafeNativeMethods - DispatchMessage

Dispatcher - PushFrameImpl

Dispatcher - PushFrame

Application - RunDispatcher

Application - RunInternal

Application - Run

App - Main

Do I have to take care some how of the binding or how can I catch this to prevent app crash?

Thanks for help!!!!!!

BR Gert

Calendar

answered on 23 Jan 2020