Questions on UI for WPF Forum

3 answers

642 views

RadListBox set item background color based on its value

I have a RadListBox as a messagebox which is bound to a list of messages from the system. When there is a fault in the system a fault message is recorded, I want to highlight this message with red background. Is there any way to change the background of an item based on its value.

I tried this code but it didn't have access to background property.

this.ListBox.Items.CurrentChanged += (sender, args) =>

{

for (int i = 0; i < this.ListBox.Items.Count; ++i)

{

var item = this.ListBox.Items[i];

if (item.ToString().StartsWith("Fault"))

{

ListBox.Items[i]............????????? Looking for background property.

}

};

Thanks.

ListBox

answered on 11 Jun 2015

1 answer

2.0K+ views

Textbox with rounded corners

Consider this code, which displays a textbox with rounded corners:

<Window x:Class="WpfApplication1.MainWindow"

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

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

xmlns:System="clr-namespace:System;assembly=mscorlib"

Title="MainWindow" Height="350" Width="525">

<Window.Resources>

<ControlTemplate TargetType="TextBoxBase" x:Key="txt">

<Border Padding="10" CornerRadius="10" BorderThickness="1" BorderBrush="Black" x:Name="Bd" Background="{TemplateBinding Panel.Background}">

<ScrollViewer Name="PART_ContentHost" SnapsToDevicePixels="{TemplateBinding UIElement.SnapsToDevicePixels}" />

</Border>

<ControlTemplate.Triggers>

<Trigger Property="UIElement.IsEnabled">

<Setter Property="Panel.Background" TargetName="Bd">

<Setter.Value>

<DynamicResource ResourceKey="{x:Static SystemColors.ControlBrushKey}" />

</Setter.Value>

</Setter>

<Setter Property="TextElement.Foreground">

<Setter.Value>

<DynamicResource ResourceKey="{x:Static SystemColors.GrayTextBrushKey}" />

</Setter.Value>

</Setter>

<Trigger.Value>

<System:Boolean>False</System:Boolean>

</Trigger.Value>

</Trigger>

</ControlTemplate.Triggers>

</ControlTemplate>

</Window.Resources>

<Grid>

<TextBox

Template="{StaticResource txt}"

Margin="10"

Padding="10"

Background="Transparent"

BorderThickness="0"

Width="254"

Height="55"/>

</Grid>

</Window>

But if I add reference to telerik controls, then the border of the textbox is displayed again, regardles of the 'BorderThickness' property. This is my code in App.xaml (if I comment this out then everything is ok again):

        <ResourceDictionary>

            <ResourceDictionary.MergedDictionaries>

                <ResourceDictionary Source="/Telerik.Windows.Themes.Windows8;component/Themes/System.Windows.xaml"/>

                <ResourceDictionary Source="/Telerik.Windows.Themes.Windows8;component/Themes/Telerik.Windows.Controls.xaml"/>

                <ResourceDictionary Source="/Telerik.Windows.Themes.Windows8;component/Themes/Telerik.Windows.Controls.Navigation.xaml"/>

                <ResourceDictionary Source="/Telerik.Windows.Themes.Windows8;component/Themes/Telerik.Windows.Controls.Docking.xaml"/>

            </ResourceDictionary.MergedDictionaries>

        </ResourceDictionary>

General Discussions

answered on 11 Jun 2015

1 answer

137 views

Second interval for large time period

Hi,

I have a large time period from 2010/1/1 to 2015/1/1 and I have a second interval support second for large range time

When I zoom in into the intervals, the project became stopped because of a System.OutOFMemoryException Error.

My questions :

1- Dose I use virtualization in correct way ?

2- Does the RadTimeLine Support the second interval for large period or my code is wrong?

My code :

<telerik:RadTimeline x:Name="RadTimeline1"
PeriodStart="{Binding StartDate, Mode=TwoWay}"
PeriodEnd="{Binding EndDate, Mode=TwoWay}"
StartPath="Date"
DurationPath="Duration"
IsSelectionEnabled="True"
SelectionMode="Extended"
VirtualizingPanel.IsVirtualizing="True"
ItemsSource="{Binding Data}">
<telerik:RadTimeline.Intervals>
<telerik:YearInterval />
<telerik:MonthInterval />
<telerik:WeekInterval />
<telerik:DayInterval />
<telerik:HourInterval />
<telerik:MinuteInterval />
<telerik:SecondInterval VirtualizingPanel.IsVirtualizing="True"/>
</telerik:RadTimeline.Intervals>
</telerik:RadTimeline>

TimeLine

answered on 11 Jun 2015

1 answer

141 views

Widget Header + Prism Region + Floating Window

Hi Telerik Team,

We have a several Widgets in Docking Control. Most Widgets have a PRISM Region in their Titlebar, this works good at the moment.

But when Widgets get floated into the ToolWindow and then readded to the Docking I get exceptions from Prism etc.

So I wanted to ask how do implement A Region inside Widget Title Bar Header that support Floating and readding to the Docking.

Thank you

Johannes

Docking

answered on 11 Jun 2015

2 answers

304 views

Page count in WPF Rad Document

Is there any easy way to get the current page count from a WPF RadDocument that is set to layout Paged?

General Discussions

answered on 11 Jun 2015

4 answers

228 views

Keyboard Events for RadTreeView Checkbox

Hi,

As CheckedItems Event of RadTreeView is not giving results properly, we implemented RadTreeView Checkbox using MVVM using http://docs.telerik.com/devtools/wpf/controls/radtreeview/how-to/howto-tri-state-mvvm. Now, we are able to get the checked items properly.

Now, how should we support keyboard events like by pressing CTRl+Space , Node should get selected. Is there any way to handle this. If we do not use MVVM TriState check box, we can acheive by setting the property "IsOptionElementsEnabled" to true.

Please let me know your inputs.

Thanks,

Subhashini

TreeView

answered on 11 Jun 2015

4 answers

190 views

Tree Layout - why so much spacing?

I am trying to represent a Yes/No decision tree using the Diagram control. When rendered using the TreeDown, OrgChart layout/router, it seems that some nodes are rendered with minimal offset, while others are rendered so that there is no vertical alignment, yet I add the connectors in the same fashion.

See attached for an example. The result is that a significant amount of scrolling is needed to follow the connectors to the nodes.

Is there a way I can indicate that it is ok to draw nodes with vertical overlap (similar to how the "yes" path is drawn in the example), instead of the layout engine leaving room under shapes and causing the diagram to appear abnormally wide?

Diagram

answered on 11 Jun 2015

1 answer

60 views

Update from 2014 Q3 to 2015 Q1

Hello Telerik,

I updated my WPF project from 2014 Q3 to 2015 Q1 and it seems that the user insert of rows in the RadGridView dose not work any more and it seems that the ShowInsertRow property dose no longer exist?

Greetings Uwe

GridView

answered on 11 Jun 2015

1 answer

256 views

RadGridView, billions of rows and loading on-the-fly

Hi,

we're using a RadGridView for displaying result sets of dynamic database queries. These queries are user-customizable and may (especially during design phase) yield several billions of rows.

The RadGridView is configured to use row virtualization. However, when using an IEnumerable-derived ResultsSet (which will load the requested items on the fly), all items are enumerated before the first few are being displayed. This operation requires a lot of memory and fails for larger result sets.

Before investing effort in implementing IQueryable for the ResultsSet object, we'd like to ensure this would enable us to dynamically load the currently displayed rows only.

Does anyone have any experience using RadGridView in such a scenario?

Any help is greatly appreciated!

Best regards,

Oliver

GridView

answered on 10 Jun 2015

3 answers

162 views

Current month position

I,

I would like to know if it's possible to change the current month position in the display?
I mean, if I have a 3x3 calendar display, I would like to have the current month at the middle position or at the lower left position.

Thank's

Calendar

answered on 10 Jun 2015