Questions on UI for WPF Forum

1 answer

257 views

Hello!

I want not to completely cancel a SelectionChanging event in the GridView but instead just modify AddedItems (remove some of them that are not fitting to the previously selected items). It should look like a normal selection via drag and drop, just with some unselected items in beetween.

GridView

answered on 15 May 2017

6 answers

476 views

Filtering on a GridViewComboboxColumn with using a converter

Hi Telerik,

We have column data where values are coming in as integer values of 0 or 1 and we are using a converter (using convert and convertback) to convert the 0/1 values to "Y/N" (i.e. simple type to simple type).

The converter is working well, however, the default Filter Control is showing the values "N/N". The filter should be showing "Y/N" or "N/Y" values, instead.

Please find the XAML for the GridViewComboboxColumn below, bound using MVVM.

...

<telerik:GridViewComboBoxColumn DataMemberBinding="{Binding AnIntegerColumn, Converter={StaticResource IntegerToYNConverter}}" Header="AColumn" Width="80">
<telerik:GridViewComboBoxColumn.ItemsSource>
<x:Array Type="{x:Type sys:String}">
<sys:String>Y</sys:String>
<sys:String>N</sys:String>
</x:Array>
</telerik:GridViewComboBoxColumn.ItemsSource>

</telerik:GridViewComboBoxColumn>
...

Could you please advise?

Kind regards.

p.s. If there is a way to make this link fit our approach, please also advise: http://www.telerik.com/blogs/filtering-gridviewcomboboxcolumn-in-radgridview-for-wpf

GridView

answered on 15 May 2017

2 answers

128 views

RadDiagramContainerShape without typical behaviours

Hi to all,

I need a RadDiagramContainerShape that has not use auto-sizing capabilities, I would afterthat I add several RectangleShapes into RadDiagramContainerShape, I can't move any RectangleShape outside to RadDiagramContainerShape .

How can I do this? .... Can I do this?

Diagram

answered on 15 May 2017

3 answers

149 views

Better event for item moved events

Hi to all,

I don't understand witch event is better to intercept when a Shape was moved.

I need to trace when Shape change position.

Diagram

answered on 15 May 2017

2 answers

175 views

Vertical alignment of InputGestureText in Office2016 Theme faulty

Hi,

the vertical alignment of InputGestureText in Office2016 Theme is faulty. In VisualStudio2013 Theme everthing is fine.

How can i correct this?

Thanks!

Menu

answered on 12 May 2017

1 answer

58 views

RADDATAPAGER

Hi,

We have an immediate requirement for our client where we need to override the default behavior of the telerik Raddatapager,

Where we need to enable the previous button when we are on the first page and on click of it, Raddatapager should navigate to the last page.

Problem We are facing is that We are not able to enable the previous button when raddatapager is on the first page.

Any support on this will be greatful.

regards,

Jai Singh

General Discussions

answered on 12 May 2017

5 answers

175 views

RadDataPager - Requirement for Previous and Back button to be enabled Always

Hi ,
I have a requirement of Infinite paging,
Where I want both previous and next button to get navigate to last and first page respectively.
Navigating to first page on click of Next page button When user is on last page can be achieved by setting IsTotalItemCountFixed = false
But how to have previous page button navigate to the last page When User is on the First page of the Grid ?
Any assistance would be a great help :)

General Discussions

answered on 12 May 2017

1 answer

202 views

GridViewCell in next row goes to edit mode

Hi,

I'm using RadGridView with multiple columns for which first column is editable with EditTrigger as 'F2'. The value is these will be unique and any conflict is handled by setting HasValidationErrors to true after committing the change and validating the same. The cell will be put back to edit mode in case of a conflict.

In a specific case where there is an error on the cell and the user handles it (by providing a unique value) and commits the change (handled in Enter press), then the error on that cell is removed and the row gets focused. Now when a Down/Up arrow key is pressed, the focus shifts to the row below/above and the cell goes to Edit mode which is not desired.

Similar behavior is seen when 'Tab' key is pressed on and cell that is in editable mode -> Cell in the next rows goes to edit mode.

Below is the call stack which puts the cell in edit mode.

.................

Telerik.Windows.Controls.GridView.dll!Telerik.Windows.Controls.GridView.GridViewCell.IsInEditMode.set(bool value) Unknown
Telerik.Windows.Controls.GridView.dll!Telerik.Windows.Controls.GridView.GridViewDataControl.SwitchCellToEditMode(Telerik.Windows.Controls.GridView.GridViewCell cell) Unknown
Telerik.Windows.Controls.GridView.dll!Telerik.Windows.Controls.GridView.GridViewDataControl.BeginEdit(Telerik.Windows.Controls.GridView.GridViewCell gridViewCell, System.Windows.RoutedEventArgs editEventArgs) Unknown
Telerik.Windows.Controls.GridView.dll!Telerik.Windows.Controls.GridView.GridViewDataControl.BeginEdit(System.Windows.RoutedEventArgs editEventArgs) Unknown
Telerik.Windows.Controls.GridView.dll!Telerik.Windows.Controls.GridView.GridViewDataControl.OnBeginEditCommand(object sender, System.Windows.Input.ExecutedRoutedEventArgs e) Unknown
PresentationCore.dll!System.Windows.Input.CommandBinding.OnExecuted(object sender, System.Windows.Input.ExecutedRoutedEventArgs e) Unknown
PresentationCore.dll!System.Windows.Input.CommandManager.ExecuteCommandBinding(object sender, System.Windows.Input.ExecutedRoutedEventArgs e, System.Windows.Input.CommandBinding commandBinding) Unknown
PresentationCore.dll!System.Windows.Input.CommandManager.FindCommandBinding(System.Windows.Input.CommandBindingCollection commandBindings, object sender, System.Windows.RoutedEventArgs e, System.Windows.Input.ICommand command, bool execute) Unknown
PresentationCore.dll!System.Windows.Input.CommandManager.FindCommandBinding(object sender, System.Windows.RoutedEventArgs e, System.Windows.Input.ICommand command, bool execute) Unknown
PresentationCore.dll!System.Windows.Input.CommandManager.OnExecuted(object sender, System.Windows.Input.ExecutedRoutedEventArgs e) Unknown
PresentationCore.dll!System.Windows.RoutedEventArgs.InvokeHandler(System.Delegate handler, object target) Unknown
PresentationCore.dll!System.Windows.EventRoute.InvokeHandlersImpl(object source, System.Windows.RoutedEventArgs args, bool reRaised) Unknown
PresentationCore.dll!System.Windows.UIElement.RaiseEventImpl(System.Windows.DependencyObject sender, System.Windows.RoutedEventArgs args) Unknown
PresentationCore.dll!System.Windows.Input.RoutedCommand.ExecuteImpl(object parameter, System.Windows.IInputElement target, bool userInitiated) Unknown
Telerik.Windows.Controls.GridView.dll!Telerik.Windows.Controls.GridView.GridViewDataControl.ExecutePendingCommand() Unknown
Telerik.Windows.Controls.GridView.dll!Telerik.Windows.Controls.GridView.GridViewDataControl.OnSelectCurrentUnitCommand(object sender, System.Windows.Input.ExecutedRoutedEventArgs e) Unknown
PresentationCore.dll!System.Windows.Input.CommandBinding.OnExecuted(object sender, System.Windows.Input.ExecutedRoutedEventArgs e) Unknown
PresentationCore.dll!System.Windows.Input.CommandManager.ExecuteCommandBinding(object sender, System.Windows.Input.ExecutedRoutedEventArgs e, System.Windows.Input.CommandBinding commandBinding) Unknown
PresentationCore.dll!System.Windows.Input.CommandManager.FindCommandBinding(System.Windows.Input.CommandBindingCollection commandBindings, object sender, System.Windows.RoutedEventArgs e, System.Windows.Input.ICommand command, bool execute) Unknown
PresentationCore.dll!System.Windows.Input.CommandManager.FindCommandBinding(object sender, System.Windows.RoutedEventArgs e, System.Windows.Input.ICommand command, bool execute) Unknown
PresentationCore.dll!System.Windows.Input.CommandManager.OnExecuted(object sender, System.Windows.Input.ExecutedRoutedEventArgs e) Unknown
PresentationCore.dll!System.Windows.RoutedEventArgs.InvokeHandler(System.Delegate handler, object target) Unknown
PresentationCore.dll!System.Windows.EventRoute.InvokeHandlersImpl(object source, System.Windows.RoutedEventArgs args, bool reRaised) Unknown
PresentationCore.dll!System.Windows.UIElement.RaiseEventImpl(System.Windows.DependencyObject sender, System.Windows.RoutedEventArgs args) Unknown
PresentationCore.dll!System.Windows.Input.RoutedCommand.ExecuteImpl(object parameter, System.Windows.IInputElement target, bool userInitiated) Unknown
Telerik.Windows.Controls.GridView.dll!Telerik.Windows.Controls.GridView.GridViewDataControl.ExecutePendingCommand() Unknown
Telerik.Windows.Controls.GridView.dll!Telerik.Windows.Controls.GridView.GridViewDataControl.NextCellFocusedAction.AnonymousMethod__37(System.Windows.FrameworkElement f) Unknown

...........

Please provide info on why this behavior is seen.

Regards,

Raghavendar.K

GridView

answered on 12 May 2017

3 answers

538 views

Axis Title layout when binding text and font size to observable properties

Hello,

I added axis titles to my chart by adding TextBlocks. When providing the Text and FontSize properties through constant literal values immediately within the xaml code, everything works fine. The plot area is reduced in order to leave enough room for the titles, and the titles itself are centered on the axes' extents.

However, when using bindings in order to provide the values for the Text and FontSize properties from a view model (INotifyPropertyChanged, standard observable properties), the plot area is not reduced to accommodate the titles, resulting in the titles being rendered off-center and either partially or fully outside the chart control's bounds.

I have created a minimal demonstration program, which consists of a main window xaml definition containing the chart:

<Window x:Class="WpfApplication2.MainWindow" 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" xmlns:wpfApplication2="clr-namespace:WpfApplication2" Title="MainWindow" Height="600" Width="800"><DockPanel LastChildFill="True"><telerik:RadCartesianChart Margin="100" x:Name="mChart" BorderBrush="Aquamarine" BorderThickness="5" ClipToBounds="False"><telerik:RadCartesianChart.DataContext><wpfApplication2:ChartViewModel/></telerik:RadCartesianChart.DataContext><telerik:LineSeries StrokeThickness="5"><telerik:LineSeries.DataPoints><telerik:CategoricalDataPoint Category="A" Value="2" /><telerik:CategoricalDataPoint Category="B" Value="5" /><telerik:CategoricalDataPoint Category="C" Value="3" /></telerik:LineSeries.DataPoints></telerik:LineSeries><telerik:RadCartesianChart.HorizontalAxis><telerik:CategoricalAxis><telerik:CategoricalAxis.Title><TextBlock Text="{Binding TitleText}" FontSize="{Binding FontSize, Mode=OneWay}"/></telerik:CategoricalAxis.Title></telerik:CategoricalAxis></telerik:RadCartesianChart.HorizontalAxis><telerik:RadCartesianChart.VerticalAxis><telerik:LinearAxis><telerik:LinearAxis.Title><TextBlock Text="{Binding TitleText}" FontSize="{Binding FontSize, Mode=OneWay}"/></telerik:LinearAxis.Title></telerik:LinearAxis></telerik:RadCartesianChart.VerticalAxis></telerik:RadCartesianChart></DockPanel></Window>

The Viewmodel is trivial:

using System.ComponentModel;

using System.Runtime.CompilerServices;

using WpfApplication2.Annotations;

namespace WpfApplication2

{

class ChartViewModel : INotifyPropertyChanged

{

#region Fields

private string mTitleText;

public string TitleText { get { return mTitleText; } set { SetProperty(ref mTitleText, value); } }

private double mFontSize;

public double FontSize { get { return mFontSize; } set { SetProperty(ref mFontSize, value); } }

#endregion

#region Construction

public ChartViewModel()

{

mTitleText = "THIS IS THE AXIS TITLE";

mFontSize = 72.0d;

}

#endregion

#region Interface

public event PropertyChangedEventHandler PropertyChanged;

#endregion

#region Implementation

protected bool SetProperty<TProperty>(ref TProperty aStorage, TProperty aValue, [CallerMemberName]string aPropertyName = null)

{

if (Equals(aStorage, aValue))

return false;

aStorage = aValue;

// ReSharper disable ExplicitCallerInfoArgument

RaisePropertyChanged(aPropertyName);

// ReSharper restore ExplicitCallerInfoArgument

return true;

}

public bool SetProperty<TProperty>(ref TProperty aStorage, TProperty aValue, ref bool aChangedFlag, [CallerMemberName]string aPropertyName = null)

{

// ReSharper disable once ExplicitCallerInfoArgument

if (!SetProperty(ref aStorage, aValue, aPropertyName))

return false;

aChangedFlag = true;

return true;

}

protected void RaiseOtherPropertyChanged(string aPropertyName)

{

// ReSharper disable once ExplicitCallerInfoArgument

RaisePropertyChanged(aPropertyName);

}

[NotifyPropertyChangedInvocator]

protected virtual void RaisePropertyChanged([CallerMemberName] string aPropertyName = null)

{

PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(aPropertyName));

}

#endregion

}

The attached screenshot shows the result. Please note that the aquamarine rectangle is the actual border of the chart, and that the ClipToBounds property is set to false, otherwise the title of the categorical axis would not be visible at all.

My goal is to allow the user to design the axes' titles' appearances dynamically, not only be defining their text, but also their font, font size, weight, etc. Therefore the according properties of the TextBlocks will have to be changed dynamically at run-time. Is there any other way to achieve this without breaking the layout mechanism?

Any help would be greatly appreciated, thanks in advance!

ChartView