Questions on UI for WPF Forum

2 answers

538 views

[Solved] RadNumericUpDown does not fire propertychanged when empty

Hi,

I encountered an issue with the RadNumericUpDown control. I have defined the UpdateValueEvent to PropertyChanged, this works fine as long as I am entering valid numeric values. But in case that I just delete the whole text from the NumericUpDown control the value is not updated in my viewmodel because the setter for the binded value is not called. When I leave the RadNumericUpDown afterwards the setter is called correctly and the value in my viewmodel is set to null.

This is my definition in XAML

<telerik:RadNumericUpDown Value="{Binding DurationFrom, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
               ValueFormat="Numeric" NumberDecimalDigits="0" ShowButtons="True"
               Minimum="1" Maximum="{Binding DurationTo, Mode=OneWay, TargetNullValue=1.0}"
               NullValue="" UpdateValueEvent="PropertyChanged" />

Is this a known issue with the NumericUpDown control and is there any workaround for this?

Regards,

Micha

NumericUpDown

answered on 07 Sep 2016

10 answers

788 views

RadGridView Column Binding to Second level property

Hi,

I'm trying to bind the RadGridView column to a second level property. This is my code:

...
<telerik:RadGridView x:Name="GridView" Loaded="GridView_Loaded" ItemsSource="{Binding ViewMember.TelerikView}"/>
...

private void GridView_Loaded(object sender, RoutedEventArgs e)
{
    foreach (var f in ViewMember.Data.Fields)
    {
        var col = new Telerik.Windows.Controls.GridViewDataColumn();
        col.Header = f;
        col.DataMemberBinding = new Binding(f);//f is Country.Name
col.UniqueName = f;
        GridView.Columns.Add(col);
    }
}

When f is ID it works fine, but when its Country.Name the column is showed but the row is empty. How can i fix this behavior?

Thanks!

GridView

answered on 07 Sep 2016

5 answers

324 views

Change the cursor on zoom and pan

Hi,

I am using a RadCartesianChart for displaying ScatteredLineSeries. Here is my Xaml.

<telerik:RadCartesianChart.Behaviors>

<telerik:ChartPanAndZoomBehavior DragMode="Pan" ZoomMode="Both" PanMode="Both" />

<telerik:ChartTooltipBehavior />

</telerik:RadCartesianChart.Behaviors>

How can i change the cursor on Zoom and Pan?

ChartView

answered on 07 Sep 2016

1 answer

235 views

Cannot find Telerik.Windows.Diagrams.Core.xaml

Where can i get Telerik.Windows.Diagrams.Core.xaml. I cannot find it in:

C:\Program Files (x86)\Telerik\UI for WPF Q1 2016\Themes.Implicit\WPF40\Vista\Themes

Thanks

Diagram

answered on 07 Sep 2016

4 answers

142 views

[Solved] Why is RadPain not closed when I click 'Close' button in the right upper coner?

Hello. When I want to close RadPain and click 'Close' button ('X') in right upper corner of the RadPain then this RadPain is not closed. Below is XAML where RadPain is:

<UserControl x:Class="DeviceReading.Views.DeviceReadingView"

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

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

xmlns:prism="http://prismlibrary.com/"

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

prism:ViewModelLocator.AutoWireViewModel="True">

<Grid>

<Grid.RowDefinitions>

<RowDefinition Height="Auto"/>

<RowDefinition/>

</Grid.RowDefinitions>

<Grid.ColumnDefinitions>

<ColumnDefinition/>

</Grid.ColumnDefinitions>

<StackPanel Grid.Row="0" Grid.Column="0" HorizontalAlignment="Stretch" Margin="0 5 0 3" Orientation="Horizontal">

<CheckBox Content="Gas velocity" Command="{Binding Path=ShowHideGasVelocityChartViewCommand}" CommandParameter="{Binding Path=IsChecked, RelativeSource={RelativeSource Self}}"/>

</StackPanel>

<telerik:RadDocking Grid.Row="1" Grid.Column="0" x:Name="Docking">

<telerik:RadSplitContainer>

<telerik:RadPaneGroup>

<telerik:RadPane DataContext=

"{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type telerik:RadDocking}}, Path=DataContext}"

Header="Gas Velocity"

prism:RegionManager.RegionName="GasVelocityChartRegion" IsHidden="{Binding IsGasVelocityChartHidden, Mode=TwoWay}"/>

</telerik:RadPaneGroup>

</telerik:RadSplitContainer>

</telerik:RadDocking>

</Grid>

</UserControl>

Below is the definition of ShowHideGasVelocityChartViewCommand command that is bound to Command property of CheckBox:

public DelegateCommand<object> ShowHideGasVelocityChartViewCommand { get; private set; }

private void showHideGasVelocityChartView(object parameter)

{

if ((bool)parameter == true)

this.IsGasVelocityChartHidden = true;

else

this.IsGasVelocityChartHidden = false;

}

Below is the definition of IsGasVelocityChartHiden property that is bound to IsHidden property of the RadPain.

public bool IsGasVelocityChartHidden

{

get { return this._isGasVelocityChartHidden; }

set { this.SetProperty(ref this._isGasVelocityChartHidden, !value); }

}

During application runtime, this RadPain contains View with the dynamically changed chart of gas velocity. This RadPain is shown and hidden by the click on the CheckBox (when the CheckBox is checked then the RadPain is visible, but when the CheckBox is unchecked then the RadPain is invisible - hidden). But I want that this RadPain can ALSO be hidden by clicking of its 'Close' ('X') button that is in the right upper corner of this RadPain. And when the RadPain is closed by clicking its 'Close' ('X') button then the CheckBox must set to Unchecked status so that after I can click on CheckBox, set it to 'Checked' status and visualize the RadPain again. Please help me if this is possible to do it.

Docking

answered on 07 Sep 2016

2 answers

156 views

[Solved] CollectionEditor - perform validation using IDataErrorInfo

Hi,

The validation is working alright with viewmodel bound to PropertyGrid. But it is not working when it is bound to CollectionEditor. (See attached picture)

Can you share some example on how to do that?

PropertyGrid

answered on 07 Sep 2016

5 answers

1.3K+ views

Select previously selected row after refresh

I have a grid view that is data bound to a collection of objects, The grid gets refreshed every 30 seconds, we are getting he data from rest service and we create new objects for every refresh.

If user selects a row, I want to keep that selection after the refresh, I have my own logic to remember the last item and after the itemsource is updated I set the selectedItem to the previously selecteditem

But the problem is that after the data is loaded there is a selected item change event raised by the grid and it sets the selection to first row, I know this is because i have set IsSynchronizedWithCurrentItem="True", But i need that to show the row indicator, Also if i do not set that to true the row is selected but it does not have any focus, I mean visually you can tell that the row is selected it does not have the border or selected item color.

Is there any way that I can keep IsSynchronizedWithCurrentItem="True" and also set the selected item after the refresh and after the grid has raised its last selected item changed event.

The order of events is like this

- Update collection, - i set previous item - grid set the item to null - then grid set the item to first row

GridView

answered on 06 Sep 2016

2 answers

152 views

Layout problem with chart and grid splitter

I am running into weird layout problem with Chart view and grid splitter, I have user control with a grid with 3 columns. I have a a grid in first column grid splitter in 2nd and chart view and third

Everything looks good when the window is first rendered, But if i move the splitter to make the 3rd column big the chart view keeps expanding, I mean the labels on x axis keep getting farther apart.

It would be ok as long as I can stretch the column, but if i just keep moving mouse the chart labels keeps moving.

I have attached some images to give you a better idea

Chart

answered on 06 Sep 2016

2 answers

127 views

Crosshair label update

I have a live chart with a DateTimeContinuousAxis axis and a crosshair.

When new data arrives and the chart area scrolls the crosshair info does update until the mouse is moved.

Is there a way to update the crosshair labels from code?

/Flemming Rosenbrandt

ChartView

answered on 06 Sep 2016

2 answers

105 views

Multi-Level Scheduling Possible?

I am trying to see if the ScheduleView could be customized enough to be used for scheduling of Shifts. Basically, what we have is a tree like this:

I have attached an image of what I am trying to accomplish. Basically, you only schedule items at the Shift level. You can't add items to Plant or Section. That is simply to show grouping of them as a whole. So this would also allow the user to show only one Plant at time if they wanted.

I am hoping I can get some guidance on if it is possible and how could I make the headers on the left and be grouped like this? If I could do this, this would be HUGE!!!

ScheduleView

answered on 06 Sep 2016