Questions on UI for WPF Forum

6 answers

493 views

Insert LineBreak with padding to a given position (code sample)

I've written some code that insert a line break and pads the new line to a specified position along the document X axis.

I needed this code as you cannot insert new lines with indent properties. Only paragraphs can have indent properties.

So why not use a paragraph you say? Well, I needed to be able to wrap custom annotations around multiple lines which cannot be done with Paragraphs.

Main Method: When inserting into the document you will need to change the Style that I have used (see inside the while loop). My style just highlights the blank padding so I can visually see what's going on.

public static void InsertLineBreakWithSpacing(this RadDocument document, PointF positionSpacing)

{

//Insert line break at caret position

document.InsertLineBreak();

//Insert line spaces for padding until position is found

while(positionSpacing.X > document.CaretPosition.Location.X)

{

document.Insert(" ", RadDocumentStyles.LineBreakSpacing());

}

Method Call:

//Pass - reference to RadDocument - Location to pad line out to

RadDocumentExtensions.InsertLineBreakWithSpacing(radRichTextBox.Document,radRichTextBox.Document.CaretPosition.Location);

Here's my Span Style to highlight the new line padding as I previously mentioned:

public static StyleDefinition LineBreakSpacing()

{

StyleDefinition lineBreak = new StyleDefinition();

lineBreak.Type = StyleType.Character;

lineBreak.SpanProperties.HighlightColor = Colors.LightGreen;

lineBreak.DisplayName = "lineBreakSpacing";

lineBreak.Name = "lineBreakSpacing";

return lineBreak;

}

I hope this helps you.

Please let me know if you know of a better way to achieve this.

Thanks,

Rob

RichTextBox

answered on 24 May 2012

1 answer

93 views

Load KML from background thread

Is it possible to read KML from a background thread?
We have some rather large KML files and want the UI to remain responsive while we load the data.

We have been using KmlReader.Read(), is there a background thread friendly alternative to this that we can use?

Map

answered on 24 May 2012

2 answers

171 views

Resizing columns when headers are hidden

Hello,

I have a scenario where I must hide the column headers using ShowColumnHeaders="False" . Once the headers are hidden, I cannot resize the columns anymore.

Is it possible to show the "double-arrow" between grid cells to allow resizing the grid even when headers are hidden? Any other suggestion?

Many thanks,

Simon

GridView

answered on 24 May 2012

6 answers

200 views

Is there a way to prevent focus rectangle from moving when expanding nodes?

The RadTreeView seems to move the focus rectangle to child nodes as you expand parent nodes, which is not desirable because in long trees it means that there is a lot of scrolling going on.

The attached images show the problem. I start with a single parent node that has the focus rectangle on it. As I expand nodes, the focus rectangle gets shifted to the child nodes as they are shown. I want the focus rectangle to stay with the original node so that there is no scrolling.

TreeView

answered on 24 May 2012

2 answers

88 views

How to hide one of the time bars

Hi,

can someone give me a hint now to hide one of the time bars of the timeline control? The vertical space is very limited where I'm trying to use it, so it should not be higher than about 50 pixels.

Any help is appreciated.

Regards,
Mathias

TimeLine

answered on 24 May 2012

2 answers

128 views

RadPDFViewer Crashes IDE during design time

VS 2010 Pro (ver 4.0.3019 SP1Rel) crashes when I add the attribute DocumentSource="" to the XAML.

My steps are as follows:

Create new Telerik > Windows > C# RadControls WPF Application (>net 3.5 or 4.0)
Choose Telerik.Windows.Controls.FixedDocumentViewers
Auto-Selects Telerik.Windows.Controls
Auto-Selects Telerik.Windows.Documents.Fixed
Click Finish
Add <telerik:RadPdfViewer HorizontalAlignment="Stretch" VerticalAlignment="Stretch"></telerik:RadPdfViewer> to Window XAML

Then, as step 7, as soon as I add the attribute DocumentSource="", the ide crashes and restarts. It can simply be empty quotes or I can add a reference to a pdf added as a resource, it doesn't matter. As soon as the second quotation mark is added and the designer tries to update, it crashes.

Hope you can help!!!

UPDATE:

If I try to assign the DocumentSource in the codebehind, I get the error:

Locating source for 'c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Documents\Fixed\FixedDocumentViewers\UI\RadPdfViewer.cs'. Checksum: MD5 {9 32 c2 2f 18 c8 80 10 92 4e 2 a0 df da f3 e2}
The file 'c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Documents\Fixed\FixedDocumentViewers\UI\RadPdfViewer.cs' does not exist.
Looking in script documents for 'c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Documents\Fixed\FixedDocumentViewers\UI\RadPdfViewer.cs'...
Looking in the projects for 'c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Documents\Fixed\FixedDocumentViewers\UI\RadPdfViewer.cs'.
The file was not found in a project.
Looking in directory 'C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\crt\src\'...
Looking in directory 'C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\atlmfc\src\mfc\'...
Looking in directory 'C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\atlmfc\src\atl\'...
Looking in directory 'C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\atlmfc\include\'...
The debug source files settings for the active solution indicate that the debugger will not ask the user to find the file: c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Documents\Fixed\FixedDocumentViewers\UI\RadPdfViewer.cs.
The debugger could not locate the source file 'c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Documents\Fixed\FixedDocumentViewers\UI\RadPdfViewer.cs'.

PDFViewer

answered on 24 May 2012

3 answers

381 views

XAML Brushes and memory leaks

Hi,

why are Telerik brushes in XAML-Code not froozen? Potential memory leak?
More here: http://blogs.msdn.com/b/jgoldb/archive/2008/02/04/finding-memory-leaks-in-wpf-based-applications.aspx

General Discussions

answered on 24 May 2012

0 answers

76 views

number of radpanes in a container

Is there a limit of the radpanes that can be contained in a single container.?
Or in a RadPaneGroup ?

General Discussions

asked on 24 May 2012

3 answers

486 views

Grid resizes slowly on window resize

Hi,

I noticed an issue with GridView.

I bind 88 rows to a grid and when I maximise the window you get a black canvas and the grid overlayed by the same grid for a second or so before the grid resizes to the maximised window width.

I have attached a screenshot which shows this behaviour (the white areas were sensitive data cut, it's not a graphical issue).

The machine is a pretty new quad core 3Ghz machine with 8GB RAM and 512MB DDR2 ram graphic card running Win7 x64.

Visual Studio 2010 SP1, Rad Controls 20112.01.320.0. I tried with an older sample of RadGrid 2011.1.0419.40 and it had the same issue.

Is there a way to make the grid resize a little less clunky? am I missing something in the XAML?

Any feedback would be appreciated,

Thanks.

private void Window_Loaded(object sender, RoutedEventArgs e)

{

// Instantiate the DataServiceContext.

_context = new Vessel.Service.VesselService(_svcUri);

}

private void button_getvesselTypes_Click(object sender, RoutedEventArgs e)

{

try

{

StartStats();

var VTQuery = from v in _context.Vestype

select v;

DataServiceCollection<VestypeEntity> VesselTypes = new

DataServiceCollection<VestypeEntity>(VTQuery);

this._radgrid_output.DataContext = VesselTypes;

ShowStats();

}

catch (Exception ex)

{

MessageBox.Show(ex.ToString());

}

<Window x:Class="TestClient.MainWindow"

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

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

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

Title="WCF oData Test"

Width="750" Height="600"

x:Name="OutputWindow"

Loaded="Window_Loaded">

<Grid x:Name="grid_mainlayout">

<Grid.RowDefinitions>

<RowDefinition x:Name="gridrow_detailsection" Height="*"></RowDefinition>

<RowDefinition x:Name="gridrow_footersection" Height="60"></RowDefinition>

</Grid.RowDefinitions>

<telerik:RadGridView Name="_radgrid_output"

Grid.Row="0"

Margin="2"

HorizontalAlignment="Stretch"

VerticalAlignment="Stretch"

DataContext="{Binding}"

ItemsSource="{Binding}"

EnableColumnVirtualization="True"

EnableRowVirtualization="True"

DataLoadMode="Asynchronous"

IsReadOnly="True"

ActionOnLostFocus="None" />

<StackPanel x:Name="stackpannel_buttons" Grid.Row="1" Orientation="Horizontal">

<Button x:Name="button_Query1" Margin="2,10,10,10" Width="100" Content="Get 6000 rows" Click="button_getvessels_Click"></Button>

<Button x:Name="button_Query2" Margin="2,10,10,10" Width="100" Content="Get 80 rows" Click="button_getvesselTypes_Click"></Button>

</StackPanel>

</Grid>

</Window>

GridView

answered on 24 May 2012

7 answers

367 views

Setting the SelectionRectangleStyle

I have tried to set the SelectionRectangleStyle of the Diagram control without any luck. Below is the code I am using. I can see it at design time, when I run the app and load a saved diagram it seems to ignore the style. I am modifying one of the Telerik examples.

<UserControl.Resources>

<Style x:Key="Style1" TargetType="{x:Type Rectangle}">

<Setter Property="StrokeThickness" Value="12" />

<Setter Property="StrokeDashArray" Value="3 3"/>

<Setter Property="Stroke" Value="Red"/>

<Setter Property="Fill" Value="Transparent"/>

</Style>

</UserControl.Resources>

<telerik:RadDiagram x:Name="diagram" SelectionRectangleStyle="{DynamicResource Style1}" />

Diagram