Questions on UI for WPF Forum

1 answer

197 views

Possible to collapse the space left for the expander?

I am trying to use a tree view for a situation where there may or may not be children. When there are no children, the list is effectively flat, and it doesn't look right to see a big space to the left of the items where the expander would go. I tried to set the expander visual style so that the button is collapsed, but it looks like there is a minimum width on the ListRootContainer. Is there any way to do this without replacing the entire control template?

TreeView

answered on 30 Mar 2021

5 answers

118 views

[Solved] Highlight all instance of selection in a document

Hello,

Notepad++ (and other editors) have a feature where you can select a term and all instance/occurrences of this term in the document are highlighted as well.

Is this also possible in the SyntaxEditor and can this be implemented in a similar fassion. I am using the Visual basic and the CSharp syntax highlighting.

There is a functionality called HighlightAllMatches but I don't really know if this is the right method or how to Trigger it correctly.

Thanks for your time.

SyntaxEditor

answered on 29 Mar 2021

1 answer

179 views

Differentiation between setting SelectedItem and mouse click

Hi,

in my GridView I am using the SelectionChanged event. How can I distinguish in this event whether a user has clicked on a row or whether I have set the SelectedItem by code?

Regards
Heiko

GridView

answered on 29 Mar 2021

13 answers

494 views

Center Labels on DateTimeContinuousAxis

Hi,

I've a collection data, X values are hours, Y values some values.

I want to display my data hourly, BUT, i want the X labels to show only Days.

With that code :

<telerik:DateTimeContinuousAxis
LabelFormat="dd/MM"
LabelInterval="1"
LabelOffset="1"
MajorStepUnit="Day"
MajorStep="1"
PlotMode="OnTicks"
LabelRotationAngle="-45"
LabelFitMode="None"
VerticalLocation="Bottom">

My data are displayed hour by hour, the X label is the day, but the label is under the Ticks on the left. What i want is the label centered, idealy bordered on the whole area where the label is displayed (please see screenshot).

In addition, i display major lines on Days :

<telerik:RadCartesianChart.Grid>
<telerik:CartesianChartGrid MajorLinesVisibility="X">
<telerik:CartesianChartGrid.MajorXLineStyle>
<Style TargetType="Line">
<Setter Property="Stroke" Value="Black" />
</Style>
</telerik:CartesianChartGrid.MajorXLineStyle>
</telerik:CartesianChartGrid>
</telerik:RadCartesianChart.Grid>

I would like to display minor line every six hours too (please see screenshot on the two first days).

How can i do this ?

Thanks in advance

ChartView

answered on 29 Mar 2021

9 answers

1.3K+ views

Context menu command binding in Hierarchical Template with MVVM

I have a treeview with a hierarchical template and I'm using mvvm. So far I have not been able to get the command binding correct for the context menu. It's trying to bind to the item's datacontext, but I want to bind it to the datacontext of the treeview. I have tried several approaches including relativesource, etc. Any help would be appreciated.

TreeView

answered on 29 Mar 2021

4 answers

186 views

Show only year in Filter Dialog

Hi!

I have date values in my LocalDataSourceProvider and in the filter dialog I want to display only years as values. What I get is:
a) all date values
b) date values with "00:00:00" time added
c) dates with the wrong locale although I set the right culture on my LocalDataSourceProvider (this shoud be German date like "dd.MM.yyy")

What I like to have is a filter dialog showing only "2017, 2018, 2019, 2020, 2021, ..."

Besides that: the filter dialog is much too small if you have a filter condition "between" and two date values, see screenshot.

Regards
Heiko

PivotGrid

answered on 29 Mar 2021

0 answers

122 views

Radgridview not showing horizontal scroll when all groups are collapsed

Hi,

I have a WPF application where the Grid is bound with a list of entity. Row level grouping is applied on the grid. After collapsing all the groups. We are storing the grid configuration in JSON file. While opening the UI, loading the grid configuration saved in JSON file.

After collapsing all the groups manually, horizontal scroll is visible. But on reopening the UI horizontal scroll is not visible. Is it not considering column header that time or what can be the solution around this.

Appreciate on your help, please help.

Thanks!

Samaresh

GridView

asked on 26 Mar 2021

1 answer

197 views

Memory utilization increases on plotting RadCartesianChart with large number of data points

Trying to plot multiline chart with 18000 data points. Used point template as it is used for each and every data point. It takes 9 secs time to load the UI of chart.

memory utilization increases more than 1-1.5 GB after loading the chart.

Code snippet and chart image is attached...

ChartView

answered on 26 Mar 2021

1 answer

676 views

Question about multibinding in EventToCommandBehavior.EventBindings

Hello.

<EventToCommandBehavior.EventBindings> is very similar to the <interaction.triggers> function.

I want to ask if multibinding is possible here.

Is there a way to get both CommandParameter and eventArgs?

I can't build this source, but I hope this will happen. like this

<View.xaml>

<telerik:EventToCommandBehavior.EventBindings>

<telerik:EventBinding EventName="CellPropertyChanged"

Command="{Binding Command}"

PassEventArgsToCommand="True"

CommandParameter={binding ElementName="gridview"/>

</telerik:EventToCommandBehavior.EventBindings>

<ViewModel.cs>

private void Command(object[] obj)

{

var sender = obj[0] as RadGridView;

var e = obj[1] as CellPropertyChangedEventArgs;

}

Thanks.

General Discussions

answered on 25 Mar 2021

4 answers

1.7K+ views

How to user "CellEditEnded" event using MVVM?

Hello.

I want to use CellEditEnded event using MVVM.

It's a summary source.

<Button Content="Load"

Command="{Binding OnClickLoadCommand}"

CommandParameter="{Binding ElementName=gridViewSharedParameter}"/>

<telerik:RadGridView x:Name="gridViewSharedParameter"

ItemsSource="{Binding SharedParameterGroupItem.SharedParameterName}"

SelectedItem="{Binding SharedParameterSelectedItem, Mode=TwoWay}"

CurrentItem="{Binding SharedParameterCurrentItem, Mode=TwoWay}"

>

</telerik:RadGridView>

<telerik:EventToCommandBehavior.EventBindings>

<telerik:EventBinding EventName="CellEditEnded"

Command="{Binding OnCelleditEndedTextCommand}"

CommandParameter="{Binding ElementName=gridViewSharedParameter}"/>

</telerik:EventToCommandBehavior.EventBindings>

I found 2 ways.

The first is how to trigger an event in MVVM by using a button.

1. ViewModel.cs (using button in CellEditEnded event)

private void OnClickLoad(object o)

{

(o as RadGridView).CellEditEnded += ViewModel_CellEditEnded;

}

private void ReadParamFromExcelViewModel_CellEditEnded(object sender, GridViewCellEditEndedEventArgs e)

{

. . . . . . . ~~~~~

}

The second uses Telerik EventBinding.

2. ViewModel.cs (Using Xaml telerik:EventToCommandBehavior.EventBindings)

private void OnCelleditEndedText(object o)

{

var objectItem = o as Telerik.Windows.Controls.RadGridView; //

var currentItem = SharedParameterCurrentItem;

var selectedItem = SharedParameterSelectedItem;

}

I do not prefer the first method.

I want to use it in the second way, can I get the GridViewCellEditEndedEventArgs?

I want to control newdata, olddata, and editaction through GridViewCellEditEndedEventArgs.

+) What is the difference between CurrentItem and SelectedItem? It seems to receive the same value.

Thanks.

GridView

answered on 25 Mar 2021