Questions on UI for WPF Forum

2 answers

628 views

Tabchanged event on nested user control

I have a Main form with a tab control where I am trapping the tab change event in the view model.

<i:Interaction.Triggers>

<i:EventTrigger EventName="SelectionChanged">

<i:InvokeCommandAction Command="{Binding TabChanged}"

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

</i:EventTrigger>

</i:Interaction.Triggers>

Note the element name

In my view model I successfully trap the event for processing relying on the name to identify the tab control

private void tabChanged(object o)

{

if (o == null) { return; }

if (o.GetType() == typeof(Telerik.Windows.Controls.RadTabControl))

{

if ((o as Telerik.Windows.Controls.RadTabControl).Name != "TCMain")

{

return;

}

One of the main window tab items also has a user control which has a tab control called UCTab, it has no tabchanged event processing.

When I change tabs on the UCTab the event on TCMain fires and the name passed to the event in the view model is the TCMain tab.

Is it possible to isolate the UCTab from the event processing.

(I have solved this by changing the UCTab to a standard MS tab control but it is very unsatisfactory).

I have a sample project to demonstrate the problem if required.

TabControl

answered on 28 Mar 2017

15 answers

416 views

[Solved] RadScheduleView - Appointments Drag & Merge

Hi,

I'm developing a new feature with Schedule View, where i need to add a drag & drop feature and allow merging two appointments if they are dragged over another.

Is it possible to acomplish that? I have an event - OnAppointmentSlotChanged - where I can re-schedule appointments, but how can i know if it is dragged over another appointment?

Thanks for any help that you can give,

Manuel

ScheduleView

answered on 28 Mar 2017

5 answers

200 views

[Solved] ListBoxDragDropBehavior.AllowReorder fails

Hi,

I'm using a simple setup with some items (just some strings) in a RadListBox with drag and drop to another RadListBox. The drag and drops works fine, but it seems like the property ListBoxDragDropBehavior.AllowReorder does not always work. As you can see I have set it to "false", and when dragging items in normal speed it prevents the items from being reordered. But if i drag and drop a bit more aggressively I can actually reorder the items within the same RadListBox. I added a custom implementation of the ListBoxDragDropBehavior with an override of CanDrop, but that method is never called when dragging aggressively.

<TabItem Header="DragTest">

<TabItem.Resources>

<ResourceDictionary>

<Style TargetType="telerik:RadListBoxItem"

BasedOn="{StaticResource {x:Type telerik:RadListBoxItem}}">

<Setter Property="telerik:DragDropManager.AllowCapturedDrag" Value="True" />

</Style>

</ResourceDictionary>

</TabItem.Resources>

<telerik:RadListBox AllowDrop="True"

ItemsSource="{Binding DragItems1}" >

<telerik:RadListBox.DragVisualProvider>

<telerik:ScreenshotDragVisualProvider />

</telerik:RadListBox.DragVisualProvider>

<telerik:RadListBox.DragDropBehavior>

<telerik:ListBoxDragDropBehavior AllowReorder="False"/>

</telerik:RadListBox.DragDropBehavior>

</telerik:RadListBox>

</TabItem>

DragAndDrop

answered on 28 Mar 2017

4 answers

233 views

[Solved] How do i get rid of the popup in wpf designer mode.

See the image below. Obviouslly i can click the white x at the top right hand corner but it just reappears when i click another telerik control

RibbonView and RibbonWindow

answered on 27 Mar 2017

0 answers

156 views

RadDataPager - How to enable the Previous Page Button When We are in the first page of the grid.

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

asked on 27 Mar 2017

1 answer

404 views

Binding a Grid column from a local variable.

I have a Telerik grid, and have following columns, that are binding with a data source
The first three columns are bound with the datasource, i want the fourth column Status to display the value contained in the local variable localStatus
<telerik:RadGridView.Columns>
<telerik:GridViewDataColumn Width="Auto" UniqueName="Id" Header="Id" DataMemberBinding="{Binding Id}"/>
<telerik:GridViewDataColumn Width="Auto" UniqueName="Name" Header="Name" DataMemberBinding="{Binding Name}"/>
<telerik:GridViewDataColumn Width="Auto" UniqueName="State" Header="State" DataMemberBinding="{Binding State}"/>
<telerik:GridViewDataColumn Width="Auto" UniqueName="Status" Header="Status" DataMemberBinding="{Binding localStatus}" "/>
</telerik:RadGridView.Columns>

How do i do that.

GridView

answered on 27 Mar 2017

2 answers

222 views

Selection using arrow keys

Is it possible to prevent selection with the arrow keys? Whenever I press an arrow key the selected date change, but I would prefer if the selection wasn't changed until I confirm with Enter (which makes the popup close). I'm binding to SelectedDate and tried to set the UpdateSourceTrigger to LostFocus, but that didn't work.

DatePicker

answered on 27 Mar 2017

1 answer

147 views

AddDragInitializeHandler DragInitializeEventArgs cancel issue

Hi,

I am having a problem with usage of cancel operation of DragInitializeEventArgs e in DragInitializeHandler.

After canceling particular items drag functionality it switches to parent item and marks it as chosen for dragging.

private void HandleDragInitialize(object sender, DragInitializeEventArgs e)
{

if(some condition)

{e.cancel=true;}

}

the item that belongs to mentioned condition will not get dragged but his parent instead.

Any solution?

TreeView

answered on 27 Mar 2017

3 answers

414 views

[Solved] How to add new menu item in code behind

Hi All

I am Using Rad Menu. Basically i am created 3 menu items like File View and Users
where as User menu item i have binded submenu from database. how to add click event for that submenus.
how can acheive that .
Thanks
G Dinakaran

Menu

answered on 26 Mar 2017

2 answers

213 views

LinearAxis define visiable labels

Hi,

i have the following LinearAxis defined in my RadCartesianChart:

<telerik:RadCartesianChart.VerticalAxis>

<telerik:LinearAxis

LabelOffset="1"

LineThickness="0"

LabelFormat="P0"

Maximum="1"

Minimum="0"

MajorStep="0.1">

</telerik:LinearAxis>

</telerik:RadCartesianChart.VerticalAxis>

I want labels only at values 0.1 (10 %) and 0.9 (90 %). See pictures in attchment (yellow lines are CartesianGridLineAnnotation and the blue one is the ScatterLineSeries).

How can I do this?

Thanks

Thomas

ChartView

answered on 24 Mar 2017