Questions on UI for WPF Forum

5 answers

799 views

I have problem with RadGridView and grid splitter. it happens when the columns are more than the visible part of RadGridView and you try to move grid splitter doesn't move here is example code: StyleManager.ApplicationTheme = new FluentTheme();

<telerik:RadRibbonWindow x:Class="TelerikWpfApp1.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:prism="http://prismlibrary.com/"

Title="MainWindow" Height="350" Width="525" WindowState="Maximized"

prism:ViewModelLocator.AutoWireViewModel="True">

<Grid>

<Grid.ColumnDefinitions>

<ColumnDefinition/>

<ColumnDefinition Width="Auto"/>

<ColumnDefinition/>

</Grid.ColumnDefinitions>

<telerik:RadGridView ItemsSource="{Binding Models}" AlternationCount="2"

AutoGenerateColumns="False"

IsReadOnly="True"

Grid.Column="0"

IsFilteringAllowed="True"

FilteringMode="Popup"

BorderThickness="1">

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test1}" Header="Test 1" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test2}" Header="Test 2" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test2}" Header="Test 3" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test4}" Header="Test 4" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test5}" Header="Test 5" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test6}" Header="Test 6" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test7}" Header="Test 7" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test8}" Header="Test 8" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test9}" Header="Test 9" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test10}" Header="Test 10" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test11}" Header="Test 11" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test12}" Header="Test 12" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test13}" Header="Test 13" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test14}" Header="Test 14" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test15}" Header="Test 15" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test16}" Header="Test 16" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test17}" Header="Test 17" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test18}" Header="Test 18" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test19}" Header="Test 19" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test20}" Header="Test 20" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test21}" Header="Test 21" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test22}" Header="Test 22" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test23}" Header="Test 23" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test24}" Header="Test 24" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test25}" Header="Test 25" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Test26}" Header="Test 26" />

</telerik:RadGridView.Columns>

</telerik:RadGridView>

<GridSplitter Grid.Column="1" Width="10" ResizeBehavior="PreviousAndNext" ResizeDirection="Columns"/>

<WebBrowser Grid.Column="2"/>

</Grid>

</telerik:RadRibbonWindow>

GridView

answered on 11 Feb 2019

5 answers

221 views

Zooming out not satisfactory

When I AutoFit() my diagram, I want all nodes to be visible on screen. However, this is impossible when the diagram is too large. The zooming restriction gets in the way.

I want to be able to zoom out until all nodes are visible on screen, no matter the size of the diagram! It doesn't matter if the rendering of the nodes suffers. In a complex diagram, I must be able to see all nodes to get an overview of its structure. This is absolutely crucial for our application so please provide us with a patch/workaround! Thanks.

I really don't understand why the zooming works this way. I get the same result if I set the Zoom to 0.1 or 0.05...

Diagram

answered on 11 Feb 2019

13 answers

2.6K+ views

Scroll to row when programmatically setting selected item

Hello,

I'm trying to implement a "find" feature where the user can enter a value in a textbox (outside of the grid) then click a button to find the row that matches the search criteria. I'm able to programmatically set the selectitem on the grid successfully, but if the item is not in the current scroll region the user has to scroll down to to the item. Is there a way to ensure that the selected item is always in view? Also, I should mention that we are using MVVM, so there is no code behind.

Thanks.

GridView

answered on 11 Feb 2019

3 answers

146 views

How to make WeekView width always the parent Element width if time is displayed vertically?

Hello,

I like to have the width of the WeekView always equal to the width of the current parrent. But as soon as I have more Appointments ScheduleView is displaying a horizontal scrollbar and I have to scroll horizontally to see the last days of the week. (See attached Screens)

Is there an option to shrink the Appointments in width so I see always the complete week without scrolling horizontally?

Kind regards,

Markus

ScheduleView

answered on 11 Feb 2019

3 answers

479 views

Labels are not visible in BarSeries when DataTemplate for lables is defined.

Hello. I use a DataTemplate for labels in BarSeries. Please see XAML below:

<telerik:RadCartesianChart Grid.Row="0" Grid.Column="0" Visibility="{Binding IsAbsoluteBarChartVisible}">

<telerik:RadCartesianChart.Annotations>

<telerik:CartesianGridLineAnnotation Axis="{Binding ElementName=verticalAxis}" Value="{Binding AnnotationValue}" Label="{Binding AnnotationLabel}" Stroke="Red"

StrokeThickness="2" DashArray="8 2" Visibility="{Binding IsAnnotationVisible}">

<telerik:CartesianGridLineAnnotation.LabelDefinition>

<telerik:ChartAnnotationLabelDefinition Location="Inside" VerticalAlignment="Bottom" HorizontalAlignment="Center">

<telerik:ChartAnnotationLabelDefinition.DefaultVisualStyle>

<Style TargetType="TextBlock">

<Setter Property="FontSize" Value="14"/>

<Setter Property="FontWeight" Value="DemiBold"/>

<Setter Property="Foreground" Value="Red" />

</Style>

</telerik:ChartAnnotationLabelDefinition.DefaultVisualStyle>

</telerik:ChartAnnotationLabelDefinition>

</telerik:CartesianGridLineAnnotation.LabelDefinition>

</telerik:CartesianGridLineAnnotation>

</telerik:RadCartesianChart.Annotations>

<telerik:RadCartesianChart.HorizontalAxis>

<telerik:CategoricalAxis/>

</telerik:RadCartesianChart.HorizontalAxis>

<telerik:RadCartesianChart.VerticalAxis>

<telerik:LinearAxis x:Name="verticalAxis" Title="{Binding Title_Y}" Minimum="{Binding AbsoluteMinimum_Y}" Maximum="{Binding AbsoluteMaximum_Y}" MajorStep="{Binding AbsoluteStep_Y}"/>

</telerik:RadCartesianChart.VerticalAxis>

<telerik:RadCartesianChart.Series>

<telerik:BarSeries ShowLabels="True" CategoryBinding="Category" ValueBinding="Value" ItemsSource="{Binding Data}">

<telerik:BarSeries.LabelDefinitions>

<telerik:ChartSeriesLabelDefinition Margin="0 20 0 0">

<telerik:ChartSeriesLabelDefinition.Template>

<DataTemplate>

<TextBlock Foreground="White"/>

</DataTemplate>

</telerik:ChartSeriesLabelDefinition.Template>

</telerik:ChartSeriesLabelDefinition>

</telerik:BarSeries.LabelDefinitions>

</telerik:BarSeries>

</telerik:RadCartesianChart.Series>

</telerik:RadCartesianChart>

But the labels are not visible in Bars in the chart in this case!

But when I comment the following code:

<!--telerik:ChartSeriesLabelDefinition.Template>

<DataTemplate>

<TextBlock Foreground="White"/>

</DataTemplate>

</telerik:ChartSeriesLabelDefinition.Template-->

Then the labels are visible nice. Why this has plase. Please help.

ChartView

answered on 11 Feb 2019

1 answer

166 views

RadDiagram - Arrangement

Hello,

I have RadDiagram with some shapes

I tried to arrange the shapes to be one on/under other and using send backward and bring forward actions, but there is a bug in that actions

The problem is that if I clicked send backward when the shape is already in backward and then click bring to front, I have to click the same times that I clicked send backward before (if I clicked 3 times after the shape was in backward, I have to click 3 times till the shape will bring to front)

I saw the bug also in telerik demos

How can I fix this bug?

Thanks

Diagram

answered on 11 Feb 2019

1 answer

817 views

Component for json

Hi,

I'm looking for the best component to show some Json code

As optional it should format and highlight the code

Thank you

General Discussions

answered on 08 Feb 2019

1 answer

523 views

How to implement custom RadGridView Search ?

Is it possible to overwrite the RadGridView Search logic and implement a custom search logic ?
My Problem is that the search works only good on text. In our grid we have columns with Date and / or columns with numbers. The search performs really poor on these types.

I attached two gif files to showcase my problem.

GridView

answered on 08 Feb 2019

11 answers

1.5K+ views

Setting Font properties of GridView's cells, etc.

I have the following implicit style:

However, only the foreground color changes - all font settings are ignored.

Searched this forum, I don't think it is Theme related, but I am using the Crystal theme

GridView

answered on 08 Feb 2019

1 answer

371 views

MCCB ObservableCollection exceptions

Hi, I am having an issue with a standalone RadMultiColumnComboBox. It needs to be populated differently each time I select a different entity (User) from a RadGridView. As I understand it the only way to do this is with events.

The problem is that I run into an exception when I try to clear the selected items from the MCCB (basically, I need to reset it), and add the new selections. I get various ObservableCollection changed event exceptions.

What is the correct way to do this to avoid these type of exceptions?

Thanks,

Ian

Here is the code I use so far:

Private changingUser As Boolean = False

Private Sub RadMultiColumnComboBox_SelectionChanged(sender As Object, e As SelectionChangeEventArgs)

Try

SyncLock lockObject

If changingUser Then

e.Handled = True

changingUser = False

Exit Sub

End If

End SyncLock

If e.AddedItems.Count = 0 AndAlso e.RemovedItems.Count = 0 Then Exit Sub

vm.AddRemoveRoles(e.AddedItems, e.RemovedItems)

Catch ex As Exception

Finally

e.Handled = True

End Try

End Sub

Private Sub Grid_SelectionChanged(sender As Object, e As SelectionChangeEventArgs)

Try

SyncLock lockObject

changingUser = True

End SyncLock

RolesBox.SelectedItems.SuspendNotifications() 'RolesBox is the RadMultiColumnComboBox

RolesBox.SelectedItems.Clear()

Dim roles = vm.GetSelectedUserRoles

For Each r In roles

RolesBox.SelectedItems.Add(r)

Next

Catch ex As Exception

Finally

RolesBox.SelectedItems.ResumeNotifications()

SyncLock lockObject

changingUser = False

End SyncLock

End Try

End Sub

Here is an example of the exceptions I am getting:

System.InvalidOperationException: 'Cannot change ObservableCollection during a CollectionChanged event.'

   at System.Collections.ObjectModel.ObservableCollection`1.CheckReentrancy()
   at System.Collections.ObjectModel.ObservableCollection`1.RemoveItem(Int32 index)
   at System.Collections.ObjectModel.Collection`1.Remove(T item)
   at Telerik.Windows.Controls.RadMultiColumnComboBox.OnSelectedItemPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs args)
   at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
   at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
   at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal)
   at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value)
   at Telerik.Windows.Controls.MultiColumnComboBox.SelectionBridge.ItemsSelectedInOwner(IEnumerable`1 addedItems)
   at Telerik.Windows.Controls.MultiColumnComboBox.SelectionBridge.OwnerSelectedItemsCollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)
   at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)
   at System.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
   at System.Collections.ObjectModel.ObservableCollection`1.InsertItem(Int32 index, T item)

MultiColumnComboBox

answered on 07 Feb 2019