Questions on UI for WPF Forum

5 answers

454 views

When you group or sort the GridView by one column and afterwards change the corresponding property, the items are more or less randomly inserted in the list.
In my case, the items have some natural sorting by some item number (as indicated by the underlying ItemsSource). There is a property which determines the ordering, however this is not exposed as a column.

Is there any way to force the items to keep this order (inside their respective groups)?

Alex

GridView

answered on 27 Mar 2015

1 answer

158 views

RadCartesianChart odd behavior

The chart in my app performs relatively well with exception to one odd behavior.

First, I am creating a point series manually. I say manually meaning I am creating it point by point. I do this using a PointTemplate so I can control the color of each point in the series. The retrieval of data and the creation of each point in the series happens pretty quickly. Less than 80 milliseconds on average.

Also on the window is a grid where when selecting a row the point series is drawn in the chart. Clicking another row removes the previous point series and creates a new one.

If I start by clicking the first row and then hold down the down arrow, it draws the first 4 to 5 rows with ease and then seems to pause. When it finally unpauses, it has "skipped" about 10 to 12 rows and from then on never pauses again. I have verified in code that the data for the "skipped" rows is being loaded. They series just aren't being rendered.

A few observations:

When the chart is very small I do not experience this. When the chart is larger I do.
As I said, after the pause, it continues and then never pause again. However if I move in the opposite direction in the grid it does pause. But again after the pause it does not do it again. Then going in the opposite direction again it does the same thing.

I have tried all the different RenderOptions available. I have also tried the RenderMode setter which is obsolete. I have also tried not using a PointTemplate.

Are there other tweaks that can be done to resolve this?

<telerik:RadCartesianChart Name="Chart"

Grid.Column="0">

<telerik:RadCartesianChart.Resources>

<DataTemplate x:Key="PointSeriesTemplate">

<Ellipse Fill="{Binding DataItem.Color, Converter={StaticResource ColorToBrushConverter}}" Width="3" Height="3"/>

</DataTemplate>

</telerik:RadCartesianChart.Resources>

<telerik:RadCartesianChart.Behaviors>

<telerik:ChartPanAndZoomBehavior/>

</telerik:RadCartesianChart.Behaviors>

<telerik:RadCartesianChart.HorizontalAxis>

<telerik:DateTimeCategoricalAxis DateTimeComponent="Minute"

LabelFitMode="MultiLine"

LabelFormat="H:mm"

LineThickness="1"

MajorTickInterval="60"

MajorTickLength="5"

TickThickness="1"/>

</telerik:RadCartesianChart.HorizontalAxis>

<telerik:RadCartesianChart.VerticalAxis>

<telerik:LinearAxis LineThickness="1"

MajorTickLength="5"

TickThickness="1"

Title="Percent Change" />

</telerik:RadCartesianChart.VerticalAxis>

<telerik:RadCartesianChart.Grid>

<telerik:CartesianChartGrid MajorLinesVisibility="XY" />

</telerik:RadCartesianChart.Grid>

<telerik:RadCartesianChart.SeriesProvider>

<telerik:ChartSeriesProvider Source="{Binding ChartData}">

<telerik:ChartSeriesProvider.SeriesDescriptors >

<telerik:CategoricalSeriesDescriptor ItemsSourcePath="ChartItems" ValuePath="YValue" CategoryPath="XValue">

<telerik:CategoricalSeriesDescriptor.Style >

<Style TargetType="telerik:PointSeries">

<Setter Property="PointTemplate" Value="{StaticResource PointSeriesTemplate}"/>

<Setter Property="RenderOptions">

<Setter.Value>

<telerik:BitmapRenderOptions/>

</Setter.Value>

</Setter>

</Style>

</telerik:CategoricalSeriesDescriptor.Style>

</telerik:CategoricalSeriesDescriptor>

</telerik:ChartSeriesProvider.SeriesDescriptors>

</telerik:ChartSeriesProvider>

</telerik:RadCartesianChart.SeriesProvider>

</telerik:RadCartesianChart>

Chart

answered on 27 Mar 2015

3 answers

427 views

Inheritance of an existing usercontrol

Hi,

In my solution, in namespace B, I have a project named CustomControls. This project contain 5 customs UserControls based on existing Telerik UserControls.

ie:

public class CustomExpander : RadExpander (no xaml attached to the class)
{
}

When I try to use my customs UserControls in my main project which is in namespace A in the same solution, in my xaml I can add as an example my CustomExpander but all the properties of the RadExpander are not accesssible in the xaml?!?

Thank's
Alain

General Discussions

answered on 27 Mar 2015

1 answer

304 views

RadDropDownButton Click does not work

Hello.

I was trying to make a simple UI-test (with NUnit framework), and my test needs to click on telerik RadDropDownButton on WPF window.
When I click on this button using mouse, it works fine (I can see 'RadContextMenu' with 'RadMenuItem' items), but when my test doing this, RadContextMenu does not appear.

Here is the part of Veiw.xaml file:

<telerik:RadDropDownButton x:Name="btnDrop" AutomationProperties.AutomationId="btnDropMenu">
 <telerik:RadDropDownButton.DropDownContent>
 <telerik:RadContextMenu BorderThickness="0">
 <telerik:RadMenuItem Header="option1" Command="{StaticResource op1CommandReference}"/>
 <telerik:RadMenuItem Header="option2" Command="{StaticResource op2CommandReference}"/>
 <telerik:RadMenuItem Header="option3" Command="{StaticResource op3CommandReference}"/>
 </telerik:RadContextMenu>
 </telerik:RadDropDownButton.DropDownContent>
</telerik:RadDropDownButton>

This is my code:

var button = win.Find.ByName<Telerik.WebAii.Controls.Xaml.RadDropDownButton>("btnDrop");
button.User.Click();

There is no exception, test finds this button, but when I'm trying to find RadMenuItem, I get this exception (just because RadContextMenu does not appear):

ArtOfTest.Common.Exceptions.FindElementException : Element Not found!

How can I fix this?

General Discussions

answered on 27 Mar 2015

8 answers

129 views

[Solved] RadDocumentPane's header shrinking issue

Hi,

In my application, I am using a RadPaneGroup with dynamically loaded RadPanes. As new RadPanes get added to this group, the pane header shrinks. How to prevent this shrinking issue when new panes get added to the group?

Any pointers?

Thanks,
Lax

GridView

answered on 27 Mar 2015

1 answer

152 views

RadDropDownButton User.Click does not work

Hello.

I was writing UI-test for WPF application (using NUnit Framework and ArtOfTests), and in my test I need to click on RadDropDownButton:

 <telerik:RadDropDownButton x:Name="btnDrop">
 <telerik:RadDropDownButton.DropDownContent>
 <telerik:RadContextMenu >
 <telerik:RadMenuItem Header="op1" Command="{StaticResource op1CommandReference}"/>
 <telerik:RadMenuItem Header="op2" Command="{StaticResource op2CommandReference}"/>
 <telerik:RadMenuItem Header="op3" Command="{StaticResource op3CommandReference}"/>
 </telerik:RadContextMenu>
 </telerik:RadDropDownButton.DropDownContent>
 </telerik:RadDropDownButton>

To click on this button, I use the following code:

var button = win.Find.ByName<Telerik.WebAii.Controls.Xaml.RadDropDownButton>("btnDrop");
button.User.Click(MouseClickType.LeftClick);

The test works fine (no exception have been thrown), but RadContextMenu does not appear.
When I click on this button using mouse, I can see this menu with 3 RadMenuItem items.

How can I solve this problem?

Buttons

answered on 27 Mar 2015

1 answer

133 views

Misaligned TimeTick labels

Hi there,

we are currently developing a wrapper control of your RadChartView RadCartesianChart. In this control we are using a DateTimeContinuousAxis like this:

<telerik:RadCartesianChart.HorizontalAxis>

<telerik:DateTimeContinuousAxis x:Name="dateTimeContinuousAxis" PlotMode="OnTicks" LabelFitMode="Rotate" MajorStepUnit="Second" LabelFormat="HH:mm:ss" FontSize="{Binding AxisFontSize, FallbackValue=14}" />

</telerik:RadCartesianChart.HorizontalAxis>

When changing the AxisFontSize we entirely re-add all Series with new loaded data to get rid of this problem without success. In that process it does not even matter the new data is in a different time range or not. This is happen in design time and in runtime after changing the AxisFontSize of our control:

https://dl.dropboxusercontent.com/u/55589036/Pictures/Animated%20Screenshots/20150326_1440.gif

Besides the AxisFontSize we provide some other DependencyProperties:

· TimeRange to adjust the duration time. When changing the TimeRange we will also re-add everything and generate some empty data to get the desired time span on the X axis.
· TimeTickCount to change the number of time ticks on the X axis. When this is changed we only re-calculate the desired MajorStep value for the DateTimeContinuousAxis.

Combining those three settings together results in strange behaviors with the X axis date time value labels when changing the AxisFontSize in the first place:

https://dl.dropboxusercontent.com/u/55589036/Pictures/Animated%20Screenshots/20150326_1441.gif

Now how can we get rid of it? We already tried to re-add entirely new data in a different time scope. We also tried using UpdateLayout() and InvalidateVisual() in the end of our Update() method that re-adds the series. It seems this is a bug and we cannot find a way to bypass it. As I see you are keeping the old labels even on adding new data plots. This might be useful for resource management, but it disallows us to get rid of this display bug by simply redrawing those labels.

How can we fix it? Or is there a way to force your control to really redraw the labels?

Thank you!

ChartView

answered on 27 Mar 2015

3 answers

158 views

RadRichTextBoxRibbonUI Table Malfunctions

I've noticed that if I have a document with a table in it and am doing MergeFields as well. Whenever I hit one of the buttons to change what the MergeField is showing (Field Codes, Preview, etc.). The ribbon UI immediately switches to the "Layout" tab for the table, even if I am not in the table. After you press the next button once for previewing MergeFields, the issue appears to go away, but to a client using this, it would be rather annoying.

RichTextBox

answered on 27 Mar 2015

1 answer

150 views

RadMap performance in app with high memory usage

Hi guys,

My app typically uses high amount of memory, up to 1GB in some cases. My machine has 12GB so no problem. However in intensive cases, RadMap fails to respond after panning/zooming for a couple of times. When profiled, the bottleneck is in Telerik.Windows.Controls.Map.TileSource.CreateBitmap(). I tried using cache but not much improvement. Any advice?

<Window x:Class="RadMapPerf.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="MainWindow" Height="600" Width="800">

<Grid>

<telerik:RadMap x:Name="RadMap" Center="38.8993487,-77.0145665" UseDefaultLayout="False" ZoomLevel="7">

<telerik:RadMap.Provider>

<telerik:OpenStreetMapProvider IsTileCachingEnabled="True"/>

</telerik:RadMap.Provider>

</telerik:RadMap>

</Grid>

</Window>

public partial class MainWindow : Window

{

private readonly List<string> _memory = new List<string>();

public MainWindow()

{

InitializeComponent();

// fake memory usage

for (var i = 0; i < 100000000; i++)

_memory.Add("memory_usage");

}

Map

answered on 26 Mar 2015

1 answer

368 views

RTL : Numbering gets changed in RTL from left to right

Hello,

We use RadRichTextBox in RTL and when we import an HTML that contains Numbering the Bullet points come in Reverse direction.
Here is the Sample HTML and attached is the screenshot. Please provide a fix asap as our customers are facing many issues.

Best Regards,
Kushagra

-------------------------------------------------------------------------------------------------------------------

<html xmlns:v="urn:schemas-microsoft-com:vml"
xmlns:o="urn:schemas-microsoft-com:office:office"
xmlns:w="urn:schemas-microsoft-com:office:word"
xmlns:m="http://schemas.microsoft.com/office/2004/12/omml"
xmlns="http://www.w3.org/TR/REC-html40">

<head>
<meta http-equiv=Content-Type content="text/html; charset=unicode">
<meta name=ProgId content=Word.Document>
<meta name=Generator content="Microsoft Word 15">
<meta name=Originator content="Microsoft Word 15">
<link rel=File-List href="test2_files/filelist.xml">
<title>Untitled</title>

<link rel=themeData href="test2_files/themedata.thmx">
<link rel=colorSchemeMapping href="test2_files/colorschememapping.xml">

<style>

</style>

</head>

<body lang=EN-US style='tab-interval:.5in'>

<div class=WordSection1>

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RichTextBox

answered on 26 Mar 2015