Questions on UI for WPF Forum

1 answer

101 views

Question about custom RadGridView filtering on a List<> field

I have a RadGridView that I am trying to put a custom filter on. The field that I am trying to put the filter on is actually a List<string> field that I am formatting into a comma delimited list with a Converter object. If I have it set up that way, the RadGridView refuses to accept the CompositeFilterDescriptor object (using the Contains operator), but if I format the List<> to a comma delimited string before populating the GridView and forgo the Converter, it works fine.

Is there anything special you have to do when the field is a List<> or is it possible at all?

GridView

answered on 08 Feb 2016

3 answers

267 views

[Solved] GroupDescriptors and Groups

Hello,

I'm trying to figure out how to relate GroupDescriptors that I add to my Grid with the Groups that get created from them. I essentially want to say "Group my Grid by column X (using a ColumnGroupDescriptor), and have that group be expanded by default." I don't want *all* groups to be expanded by default, though, just specific ones.

I see that there is an ExpandGroup() method exposed off of GridView that can expand individual groups for me, but I don't see how the actual groups in GridView.Items.Groups are related to the GroupDescriptors used to create them.

Is there a good way for me to accomplish this?

Thanks,

Ryan

GridView

answered on 08 Feb 2016

1 answer

111 views

[Solved] Bug: Contextual group header might appear with wrong size

It happens if you add the contextual group in code, and it is set as active.

The size of the Tab inside the group should also be larger then the size of the header. The result is at appeared in the image.

Here is the code:

Main window xaml:

<telerik:RadRibbonWindow x:Class="ContextualTab_Bug.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="350" Width="525" WindowState="Maximized">

<Grid>

<Grid.RowDefinitions>

<RowDefinition Height="Auto"/>

<RowDefinition />

</Grid.RowDefinitions>

<telerik:RadRibbonView telerik:StyleManager.Theme="Windows7" ApplicationButtonContent="Home" x:Name="ribbon">

<telerik:RadRibbonTab Foreground="Black" Header="Edit" telerik:KeyTipService.AccessText="E">

</telerik:RadRibbonTab>

<telerik:RadRibbonTab Header="Controller" Foreground="Black" telerik:KeyTipService.AccessText="P" IsSelected="True">

</telerik:RadRibbonTab>

<telerik:RadRibbonTab Header="Tools" ToolTip="Tools" telerik:KeyTipService.AccessText="T">

</telerik:RadRibbonTab>

<telerik:RadRibbonTab Header="Help" telerik:KeyTipService.AccessText="S">

</telerik:RadRibbonTab>

</telerik:RadRibbonView>

<Button HorizontalAlignment="Center" VerticalAlignment="Center" Grid.Row="1" Click="Button_Click">Add Contextual Tabs</Button>

</Grid>

</telerik:RadRibbonWindow>

code behind that demonstrates the problem:

public partial class MainWindow : RadRibbonWindow

{

bool tabWasAdded = false;

public MainWindow()

{

InitializeComponent();

}

private void Button_Click(object sender, RoutedEventArgs e)

{

if (!tabWasAdded)

{

RadRibbonContextualGroup telerikContextualTab = new RadRibbonContextualGroup()

{

Name = "ct",

};

telerikContextualTab.Header = "Alarm";

telerikContextualTab.IsActive = true;

telerikContextualTab.Color = Brushes.Red;

RadRibbonTab tab = new RadRibbonTab();

tab.Header = "Alarms";

tab.ContextualGroupName = "ct";

ribbon.ContextualGroups.Add(telerikContextualTab);

ribbon.Items.Insert(ribbon.Items.Count - 1, tab);

tabWasAdded = true;

}

else

{

ribbon.ContextualGroups[0].IsActive = !ribbon.ContextualGroups[0].IsActive;

}

If you click the twice again, then the contextual tabs will become inactive and then active, and this time, it will appear correctly.

It will also be drawn with the correct size, if you just resize the window.

I have a workaround for this issue:

Add the group with IsActive=false, and then Set the IsActive=true with BeginInvoke with priority Render and higher...

RibbonView and RibbonWindow

answered on 08 Feb 2016

1 answer

171 views

Hide group button

Hi,

I would like to know if it's possible to remove the group button in the control?

Thank's

Alain

PropertyGrid

answered on 08 Feb 2016

1 answer

93 views

Document Host Strip

Good Evening,
there is a manner to diplay Document Host Strip on the right. I've read the thread where you explain how to set it bottom.
If it isn't possible, which componont can I use alternatively?

Thank you

Docking

answered on 08 Feb 2016

1 answer

185 views

UI for WPF: RichTextBox text rendering features

Hi, I need a couple of text rendering features that I can't find in your docs, and precisely:

1. Character spacing (horizontally): a numeric parameter to modify the spacing between chars. This measure could be expressed in pixels, points, percentage or whatever, the effect is that the single letters on the same line will be shown with a different spacing in between.

2. Show text in uppercase: a boolean switch. If enabled the text is shown in uppercase. When switched off, text will show back in original case, as it was written by the user. For this reason, this parameter must not modify the underlying text, only render it as uppercase when activated.

Are these features already implemented (and I just couldn't find them) or are they missing?

Thanks in advance.

RichTextBox

answered on 08 Feb 2016

2 answers

108 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

504 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

589 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

88 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