Questions on UI for WPF Forum

2 answers

224 views

Lock Position

Hello

Is there a way to lock a radDiagramItem so the user won't be able to move it?

I've already disabled the item's dragging, but the user can still change the position through Ctrl+Arrow Keys.

Diagram

answered on 02 Apr 2015

1 answer

100 views

Hide field from pivot grid but selectable in pivotfieldlist

I am looking for option similar to 'Hide Field' available in Ajax on a field selected in pivot field list.
I want the user to be able to select a field in the pivotfieldlist. But then have an option to hide it from the pivot grid view.

At the moment I can hide a field using AutoGenerateField which hides it completely from both pivotfieldlist and pivotgrid.

PivotGrid

answered on 02 Apr 2015

1 answer

371 views

Non-virtualized ListBox

Can the RadListBox operate in a non-virtualized mode. For my use-case, I need it to not be virtualized, which it is by default.

ListBox

answered on 02 Apr 2015

1 answer

174 views

ArgumentNullException when docking Window

I received this exception when trying to dock a floating window. I have not been able to reproduce it since, however. Any suggestions of how I might track this down?

System.ArgumentNullException was unhandled

HResult=-2147467261

Message=Value cannot be null.

Parameter name: element

Source=Telerik.Windows.Controls

ParamName=element

StackTrace:

at Telerik.Windows.Controls.ChildrenOfTypeExtensions.<GetChildrenRecursive>d__3.MoveNext()

at System.Linq.Enumerable.<OfTypeIterator>d__aa`1.MoveNext()

at Telerik.Windows.Controls.Docking.ToolWindow.ActivatePane()

at Telerik.Windows.Controls.Docking.ToolWindow.OnDragStart(Point globalMousePosition, Boolean isResize)

at Telerik.Windows.Controls.WindowBase.Telerik.Windows.Controls.InternalWindow.IDragAware.OnDragStart(Point globalMousePosition, Boolean isResize)

at Telerik.Windows.Controls.InternalWindow.WindowHostBase.OnDragStart(Point globalMousePosition, Boolean isResize)

at Telerik.Windows.Controls.InternalWindow.ChromelessWindowHelper.TryBeginDragResize(IntPtr hwnd, Boolean resizing)

at Telerik.Windows.Controls.InternalWindow.ChromelessWindowHelper.HandleMoving(IntPtr hwnd, IntPtr wParam, IntPtr lParam, Boolean& handled)

at Telerik.Windows.Controls.InternalWindow.ChromelessWindowHelper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)

at System.Windows.Interop.HwndSource.PublicHooksFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)

at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)

at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)

at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)

at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)

at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)

at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)

InnerException:

Docking

answered on 02 Apr 2015

4 answers

359 views

[Solved] MVVM CartesianMarkedZoneAnnotation and Fixed range

I'm having a couple of problems creating a marked zone on a RadCartesianChart and also with setting the "viewable" range on the chart. I was able to pretty much get it working in the code behind. The attached picture shows what I'm after. I'd like to be able to bind three separate charts 8hr, week and "all" or have one chart that can be set to display any of these 3. The Marked Zones that I've added come from ranges set elsewhere in the application.

<telerik:ChartDataSource x:Name="EightHourChartDataSource"

ItemsSource="{Binding EightHourData}"

SamplingUnit="Hour"

SamplingUnitInterval="1" />

<StackPanel Margin="0,0,0,30"

Orientation="Vertical">

<Label Content="Concentration % Last 8 Hours"

FontFamily="/GUIO;component/Fonts/#Segoe WP Black"

FontSize="16" />

<telerik:RadCartesianChart x:Name="chart1"

Height="150">

<telerik:RadCartesianChart.HorizontalAxis>

<telerik:DateTimeContinuousAxis LabelInterval="2"

LabelFormat="HH:mm"

FontFamily="Segoe UI"

PlotMode="OnTicks"

TickOrigin="{Binding Timestamp}" />

</telerik:RadCartesianChart.HorizontalAxis>

<telerik:RadCartesianChart.VerticalAxis>

<telerik:LinearAxis />

</telerik:RadCartesianChart.VerticalAxis>

<telerik:RadCartesianChart.Behaviors>

<telerik:ChartPanAndZoomBehavior />

</telerik:RadCartesianChart.Behaviors>

<telerik:LineSeries CategoryBinding="Timestamp"

ValueBinding="Data"

ItemsSource="{Binding ElementName=EightHourChartDataSource}"

StrokeThickness="2"

Stroke="Black"

ShowLabels="True">

<telerik:LineSeries.PointTemplate>

<DataTemplate>

<Ellipse Width="6"

Height="6"

Fill="Black" />

</DataTemplate>

</telerik:LineSeries.PointTemplate>

<telerik:LineSeries.LabelConnectorsSettings>

<telerik:ChartSeriesLabelConnectorsSettings>

<telerik:ChartSeriesLabelConnectorsSettings.Style>

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

<Setter Property="Stroke"

Value="Black" />

</Style>

</telerik:ChartSeriesLabelConnectorsSettings.Style>

</telerik:ChartSeriesLabelConnectorsSettings>

</telerik:LineSeries.LabelConnectorsSettings>

<telerik:LineSeries.LabelDefinitions>

<telerik:ChartSeriesLabelDefinition VerticalAlignment="Top"

Margin="0 0 0 6">

<telerik:ChartSeriesLabelDefinition.Template>

<DataTemplate>

<Border Background="Black"

BorderBrush="White"

BorderThickness="1">

<TextBlock Text="{Binding Label}"

Foreground="White"

FontFamily="Segoe UI"

Margin="2 0 2 1"

FontSize="10" />

</Border>

</DataTemplate>

</telerik:ChartSeriesLabelDefinition.Template>

</telerik:ChartSeriesLabelDefinition>

</telerik:LineSeries.LabelDefinitions>

</telerik:LineSeries>

</telerik:RadCartesianChart>

This is how I added the "zones" and fixed the viewable range:

Protected Overrides Sub OnViewReady(view As Object)

MyBase.OnViewReady(view)

'Get the data

Dim frm = Now.Subtract(TimeSpan.FromHours(8))

EightHourData = New BindableCollection(Of DecimalData)(_dataService.GetDecimalData("CoolantMonitor").Where(Function(d) d.Timestamp > frm))

If Not EightHourData.Any Then Return

'Get the date of the first point with 30 min padding

Dim f = EightHourData.First.Timestamp.Subtract(TimeSpan.FromMinutes(30))

FromDate = New Date(f.Year, f.Month, f.Day, f.Hour, 0, 0)

'Get the date of the last point with 30 min padding

Dim t = EightHourData.Last.Timestamp.Add(TimeSpan.FromMinutes(30))

ToDate = New Date(t.Year, t.Month, t.Day, t.Hour, 0, 0)

'Get the view

Dim v As CoolantMonitorDataView = Me.GetView

'Get the chart

Dim cv As RadCartesianChart = v.chart1

'Create a vertical axis to scale the vertical view to the min and max

cv.VerticalAxis = New LinearAxis With {.Minimum = 0, .Maximum = 20, .ShowLabels = False}

'Create a line series that will scale the horizontal view

Dim ls As New LineSeries

ls.DataPoints.Clear()

_startPoint = New CategoricalDataPoint With {.Category = FromDate, .Value = 0}

ls.DataPoints.Add(_startPoint)

_endPoint = New CategoricalDataPoint With {.Category = ToDate, .Value = 0}

ls.DataPoints.Add(_endPoint)

cv.Series.Add(ls)

cv.Annotations.Clear()

'Get the range settings

Dim ranges = CoolantConcentrationRange.GetRange.Ranges

'Create a marked zone for each range and add it the the Chart Annotations

For Each r In ranges

Dim b As New SolidColorBrush(r.RangeColor)

b.Opacity = 0.3

cv.Annotations.Add(New CartesianMarkedZoneAnnotation With {.HorizontalFrom = FromDate,

.HorizontalTo = ToDate,

.VerticalFrom = r.LowerValue,

.VerticalTo = r.UpperValue,

.Fill = b})

Next

End Sub

ChartView

answered on 01 Apr 2015

2 answers

65 views

[Solved] Fire Event on Reccurence

I have a project I am working on where the user can set items in the scheduler to to fire a particular times. I make that work by just reading the date/time to fire. But what I am unsure of is how to fire off a Recurrence? Because all that is saved is the appointment and the pattern. I saw your example in SDK about doing reminders of appointments, but that actually created a completely different scheduler item.

So is there a way for me to read recurrence pattern or from some other source to know when to fire an reoccurring event? How to test for items against a current timer?

ScheduleView

answered on 01 Apr 2015

3 answers

242 views

DataContext is NULL with DockingPanesFactory

Hello

I have dug around but found no answer to this. It seems when my new pane is added to the DocumentHost its DataContext is always null and not inherited.

I was thinking there is some way around this with the DockingPanesFactory but I couldn't find it.

WPF Inspector says that the DataContext is completely fine up until it reaches ContentElement.

Is there a way to get the ContentElement to inherit the DataContext?

Docking

answered on 01 Apr 2015

1 answer

189 views

Deriving from RadGridView

My RadGridView instances always have several properties that are set exactly the same way. Something like this:

<telerik:RadGridView RowIndicatorVisibility="Collapsed" AllowDrop="False" AutoGenerateColumns="False" CanUserDeleteRows="False" CanUserReorderColumns="False" GridLinesVisibility="Both" ShowGroupPanel="False" ShowColumnHeaders="True" IsFilteringAllowed="False" CanUserFreezeColumns="False" CanUserInsertRows="False" >...</telerik:RadGridView>

So I thought, why not derive from this control and set those properties in the constructor? I wrote this class that extends RadGridView:

namespace MyUI

{

public class MyGridView : Telerik.Windows.Controls.RadGridView

{

public MyGridView()

: base()

{

this.RowIndicatorVisibility = System.Windows.Visibility.Collapsed;

this.AllowDrop = false;

this.AutoGenerateColumns = false;

this.CanUserDeleteRows = false;

this.CanUserReorderColumns = false;

this.GridLinesVisibility = Telerik.Windows.Controls.GridView.GridLinesVisibility.Both;

this.ShowGroupPanel = false;

this.ShowColumnHeaders = true;

this.IsFilteringAllowed = false;

this.CanUserFreezeColumns = false;

this.CanUserInsertRows = false;

}

Okay, so using this should be as simple as this:

<Window ...

xmlns:local="clr-namespace:MyUI;assembly=MyUI">

<local:MyGridView >...</local:MyGridView>

</Window>

It won't compile. I get an error that says "The name 'MyGridView' does not exist in the namespace 'clr-namespace:MyUI'".

I've tried declaring the namespace with and without the "assembly=MyUI" part.

What am I doing wrong here?

Thanks.

Aaron

GridView

answered on 01 Apr 2015

3 answers

162 views

Navigation and selection issues in UnboundMode

Hello

I am using the RadDataPager in UnboundMode in connection with a RadGridView or a RadListBox.
The data from a page are loaded by an Event PageIndexChanged.
How can I navigate to a certain page (for example page 3) or select a certain element in Code-Behind or in XAML.
The commands PageIndex=3 or MoveToPage(3) seem to have no effect.

Sincerely,
A. Kasar

DataPager

answered on 01 Apr 2015

1 answer

417 views

Customize Styles for RadGridView Row Validation

Hi,

May I know is there anyway to style the row validation of Telerik Rad Grid View where I only want a red border line to highlight the particular row that have error, but not the default style where the entire row is in red.

GridView

answered on 01 Apr 2015