Questions on UI for WPF Forum

2 answers

93 views

Large features collection - Simplify

Hi,

Do you have a function to simplify a feature based on Geometry Algorithm ?

We need to reduce the number of points in polyline - line - polygon.

Thank you

Map

answered on 05 Feb 2016

7 answers

468 views

Create chart in code behind

I’m developing a service where I need to create a chart using only code behind. The chart will then be exported to a bitmap and inserted into a RadDocument.

My code is:

Grid grid = new Grid();

grid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Star) });

grid.RowDefinitions.Add(new RowDefinition { Height = GridLength.Auto });

RadCartesianChart chart = new RadCartesianChart();

chart.Grid = new CartesianChartGrid

{

MajorLinesVisibility = GridLineVisibility.Y,

StripLinesVisibility = GridLineVisibility.Y

};

chart.HorizontalAxis = new CategoricalAxis { PlotMode = AxisPlotMode.BetweenTicks };

chart.VerticalAxis = new LinearAxis { Minimum = 0, MajorTickLength = 5, Title = "Y axis title" };

// create series

for (int i = 0; i < series.Count; i++)

{

LineSeries lineSeries = new LineSeries

{

Stroke = new SolidColorBrush(series[i].Color),

LegendSettings = new SeriesLegendSettings { Title = series[i].Title }

};

foreach (var value in series[i].Values)

{

lineSeries.DataPoints.Add(new CategoricalDataPoint { Category = value.X, Value = value.Y });

}

chart.Series.Add(lineSeries);

}

RadLegend legend = new RadLegend

{

HorizontalAlignment = HorizontalAlignment.Center,

VerticalAlignment = VerticalAlignment.Bottom,

Items = chart.LegendItems

};

string panelTemplate = @"<ItemsPanelTemplate xmlns=""http://schemas.microsoft.com/winfx/2006/xaml/presentation"">" +

@"<StackPanel Orientation=""Horizontal""/>" +

@"</ItemsPanelTemplate>";

legend.ItemsPanel = (ItemsPanelTemplate)XamlReader.Parse(panelTemplate);

chart.SetValue(Grid.RowProperty, 0);

grid.Children.Add(chart);

legend.SetValue(Grid.RowProperty, 1);

grid.Children.Add(legend);

Size chartSize = new Size(width, height);

grid.Measure(chartSize);

grid.Arrange(new Rect(new Point(0, 0), chartSize));

grid.UpdateLayout();

RenderTargetBitmap bitmapRender = new RenderTargetBitmap(width, height, 96, 96, PixelFormats.Pbgra32);

bitmapRender.Render(grid);

var encoder = new PngBitmapEncoder();

encoder.Frames.Add(BitmapFrame.Create(bitmapRender));

encoder.Save(stream);

If I set a breakpoint where the RadLegend is created, I can see that the series I’ve created have been added to chart.Series but chart.LegendItems is empty.

If I continue and export the chart to a bitmap I get an empty image.

All the code seems to be alright, what am I doing wrong?

ChartView

answered on 05 Feb 2016

2 answers

549 views

Trying to create custom filter for RadGridView

I'm trying to create a custom filter for a RadGridView, but no matter what I do I get the following error.

The value "(CategoryList Contains Allergies)" is not of type "Telerik.Windows.Data.IFilterDescriptor" and cannot be used in this generic collection.

Parameter name: value

The column that the filter is on contains a List<string> of possibly multiple category names in each row and the filter contains a distinct list of the categories.

001.public partial class CategoryFilter : UserControl, IFilteringControl

002.{

003. private GridViewBoundColumnBase _column;

004.

005. public delegate void BeginCategoryChangeEvent();

006. public event BeginCategoryChangeEvent BeginCategoryChange;

007.

008. public delegate void CategoryChangeEvent();

009. public event CategoryChangeEvent CategoryChange;

010. private CompositeFilterDescriptor _compositeFilter;

011.

012.

013. public class CategoryItem

014. {

015. public string CategoryName { get; set; }

016. public bool IsChecked { get; set; }

017. }

018.

019. private List<CategoryItem> MainCategoryList;

020.

021. /// <summary>

022. /// Gets or sets a value indicating whether the filtering is active.

023. /// </summary>

024. public bool IsActive

025. {

026. get { return (bool)GetValue(IsActiveProperty); }

027. set { SetValue(IsActiveProperty, value); }

028. }

029.

030. /// <summary>

031. /// Identifies the <see cref="IsActive"/> dependency property.

032. /// </summary>

033. public static readonly DependencyProperty IsActiveProperty =

034. DependencyProperty.Register(

035. "IsActive",

036. typeof(bool),

037. typeof(CategoryFilter),

038. new System.Windows.PropertyMetadata(false));

039.

040.

041.

042.

043. public bool this[string CategoryName]

044. {

045. get

046. {

047. CategoryItem item = MainCategoryList.FirstOrDefault(i => i.CategoryName == CategoryName);

048.

049. if (item == null)

050. throw new Exception("Category Name not found");

051.

052. return (item.IsChecked);

053. }

054. set

055. {

056. CategoryItem item = MainCategoryList.FirstOrDefault(i => i.CategoryName == CategoryName);

057.

058. if (item == null)

059. throw new Exception("Category Name not found");

060.

061. item.IsChecked = value;

062. }

063. }

064.

065. [TypeConverter(typeof(String))]

066. public List<string> Categories

067. {

068. get

069. {

070. return MainCategoryList.Where(i => i.IsChecked).Select(i => i.CategoryName).ToList();

071. }

072. set

073. {

074. foreach (CategoryItem item in MainCategoryList)

075. {

076. item.IsChecked = value.Contains(item.CategoryName);

077. }

078. }

079. }

080.

081. public System.Windows.Controls.ListBox CategoryList

082. {

083. get { return this.LstCategories; }

084. }

085.

086. public CategoryFilter()

087. {

088. InitializeComponent();

089. }

090.

091. public void Prepare(GridViewColumn column)

092. {

093. this._column = column as GridViewBoundColumnBase;

094. if (this._column == null)

095. {

096. return;

097. }

098.

099. List<string> catList = ((List<EducationChoices>)(column.DataControl.ItemsSource))

100. .SelectMany(l => l.CategoryList)

101. .Distinct()

102. .Where(l => (l ?? "")

103. .Trim() != "")

104. .OrderBy(c => c)

105. .ToList();

106.

107. MainCategoryList = catList

108. .Select(i => new CategoryItem() {CategoryName = i, IsChecked = false})

109. .ToList();

110.

111. LstCategories.ItemsSource = MainCategoryList;

112. }

113.

114. private void ChangeFilter(object sender, RoutedEventArgs e) {

115. BeginCategoryChange();

116.

117. if (_compositeFilter != null) {

118. _column.DataControl.FilterDescriptors.Remove(_compositeFilter);

119. }

120. _compositeFilter = new CompositeFilterDescriptor { LogicalOperator = FilterCompositionLogicalOperator.Or };

121. var dataMember = _column.DataMemberBinding.Path.Path;

122.

123. string Category = ((CheckBox)e.OriginalSource).Tag.ToString();

124.

125. foreach (var item in MainCategoryList) {

126. if (item.IsChecked) {

127. var filter = new FilterDescriptor(dataMember, FilterOperator.Contains, Category);

128. _compositeFilter.FilterDescriptors.Add(filter);

129. }

130. }

131.

132. if ((((CheckBox)e.OriginalSource).IsChecked ?? false) &&

133. _compositeFilter.FilterDescriptors.All(f => ((FilterDescriptor)f).Value.ToString() != Category))

134. {

135. var filter = new FilterDescriptor(dataMember, FilterOperator.Contains, Category);

136. _compositeFilter.FilterDescriptors.Add(filter);

137. } else if (!(((CheckBox) e.OriginalSource).IsChecked ?? false) &&

138. _compositeFilter.FilterDescriptors.Any(f => ((FilterDescriptor) f).Value.ToString() == Category))

139. {

140. _compositeFilter.FilterDescriptors.Remove(

141. _compositeFilter.FilterDescriptors.FirstOrDefault(

142. f => ((FilterDescriptor) f).Value.ToString() == Category));

143. }

144.

145.

146. if (!_column.DataControl.FilterDescriptors.Contains(_compositeFilter)) {

147. _column.DataControl.FilterDescriptors.Add(_compositeFilter);

148. }

149.

150. this.IsActive = true;

151.

152. CategoryChange();

153. }

154.}

I found this thread and tried to figure out what it was doing, but it didn't help.

GridView

answered on 05 Feb 2016

1 answer

72 views

RadScheduleView not Maximizing

I have a laptop with 1920 x 1080 resolution. When placing a RadScheduleView into a Grid (with this the only object in this user control), if I maximize the Window, the ScheduleView will not maximize to the full extents of the screen. However, if I press the Restore Down button on the screen to get the screen out of Maximize, and drag the screen to be as large as possible, the ScheduleView fills the entire screen. I would like the ScheduleView to fill the entire screen when I press the maximize button.

Any thoughts on this behavior?

Thanks,

HH

ScheduleView

answered on 05 Feb 2016

16 answers

1.2K+ views

How to increase RadChart performance with thousands of Data Points?

Hello, All.

We are using RadChart version 2009.3.1322.35.

The chart is declared in XAML and databound to an ObservableCollection of DataPoints. The collection contains 9000 data points, which makes the chart take 1 minute to display.

How can we improve the performance of the chart to accomodate thousands of data points?

Best regards,
Brian

Note: we have already set ChartArea EnableAnimations to false.

Chart

answered on 05 Feb 2016

3 answers

1.6K+ views

how to stop applying disable style ?

i don't want to apply default disable style while IsEnabled="False" .

after this i get unwanted gray background . how to disable this styles

WatermarkTextBox

answered on 05 Feb 2016

2 answers

137 views

Which Telerik assemblies should I add to my application for successful using of Telerik UI for WPF components and controls and Telerik visual styles ?

Hi! I've just finished installation of Telerik DevTools and I'd like to begin to use it now. I have a WPF MVVM Catel application that I've begun to develop since February 1 of this year. I've added the next assemblies of Catel there: Catel.Core, Catel.Extensions.Controls, Catel.Fody.Attributes, Catel.MVVM. I'd like to use Telerik RadTabControl there. Can I use Telerik RadTabControl inside catel:Window that is the main window of my application?

1) Which Telerik assemblies should I add to my application for successful using of Telerik UI for WPF components and controls?

2) Which Telerik assemblies should I add to my application for successful using of Telerik visual styles for decorating UI appearance?

TabControl

answered on 04 Feb 2016

3 answers

196 views

Binding IsSelected Property for Tile in MVVM

Hi,

Is there an option of binding IsSelected Property for the Tile In MVVM for each of the item in list that is binded to RadTileList Control/

I am using Autogenerating tiles for the RadTileList Control.

Thanks,

Sandeep Kumar Vidiyala

TileList

answered on 04 Feb 2016

2 answers

199 views

Handler Type mismatched exception on PreparedEditor event

According to

http://docs.telerik.com/devtools/wpf/api/html/e_telerik_windows_controls_radpropertygrid_preparededitor.htm , and also to the auto completed event handler that is being created with double Tab, this should have worked, but when I try that, I get the exception above.

It looks like it is actually expecting RadRoutedEventHandler (looking at the cast inside the code), but trying to create a function with event args of type RadRoutedEventArgs generage (as expected) a compilation error.

Is this event even useful for anything?

PropertyGrid

answered on 04 Feb 2016

4 answers

259 views

Using C#.NET WebBrowser on page with RadPanelBar

I’m trying to do something similar to Automation. I need to drive a Web App containing Telerik controls. Specifically, I need to click (which activates functionality) on elements of a RadPanelBar. The RadPanelBar has two levels. The top level has four siblings, each of which has about a dozen sub items.

I am using a Win Form application running a WebBrowser control. This hosts the page pointing to the Telerick based web page containing the RadPanelBar. I can successfully programmatically “Click” the top level item. I first find the HtmlElement from its text property as shown on the working Telerik application. I then simply use the element.InvokeMember(“click”) method. This successfully expands the list of sub items on the page. Doing the same on the sub elements successfully finds the HtmlElement, but the InvokeMember(“click”) method does nothing. It does not give an error nor does it activate the code behind associated with the element.

I’ve looked at the underlying Dom for the page and have done Google searches using key words found in the actual html generated by the RadPanelBar in conjunction with keywords WebBrowser and InvokeMember. All to no avail.

I am hoping someone with underlying knowledge of the RadPanelBar can suggest reasons why it works on the first tier, but not the second and hopefully points me in the right direction.

Thanks for any help you can provide.

PanelBar

answered on 04 Feb 2016