Questions on UI for WPF Forum

1 answer

124 views

Database bound appointments and recurrence.

Hi!

I've been browsing the forum looking for an answer to my problem and found this one: http://www.telerik.com/forums/get-recurrence-appointments-by-timespan.

What I gather from the first part of that thread is that if I want to show the appointments for the week of, say, july 8th -july 14th next year, and populate it with the occurrences produced by an main appointment starting this week, I still have to find this main appointment to figure out what occurrences to show...

Is there some preferred strategy to do this suggested by previous experiences, other than just browse my whole appointments database and check each and every one having a recurrence pattern to see if I should show its occurrences?

Thanks in advance!

Miguel Pinkas

ScheduleView

answered on 26 Jun 2017

2 answers

101 views

Even height between RadSplitcontainers

I am trying to have 4 RadPanes in my control arranged in a 2x2 grid that are even height and width. The problem is, that I can't get the height to be the same across the RadSplitContainers. When the control is first opened, the top 2 RadPanes are much shorter than the bottom 2. Is there a way to get them to be equal?

Here is my code:

<telerikDocking:RadDocking Name="radDock" HasDocumentHost="False" telerik:AnimationManager.AnimationSelector="{x:Null}" telerik:AnimationManager.IsAnimationEnabled="False" MouseDoubleClick="RadDocking_MouseDoubleClick" >
<telerikDocking:RadSplitContainer Orientation="Horizontal" InitialPosition="DockedTop">
<telerikDocking:RadPaneGroup>
<telerikDocking:RadPane >
<controls:SpreadView Margin="5,5,5,5" />
</telerikDocking:RadPane>
</telerikDocking:RadPaneGroup>
<telerikDocking:RadPaneGroup>
<telerikDocking:RadPane >
<controls:SpreadView Margin="5,5,5,5" />
</telerikDocking:RadPane>
</telerikDocking:RadPaneGroup>
</telerikDocking:RadSplitContainer>
<telerikDocking:RadSplitContainer Orientation="Horizontal" InitialPosition="DockedBottom">
<telerikDocking:RadPaneGroup >
<telerikDocking:RadPane >
<controls:SpreadView Margin="5,5,5,5" />
</telerikDocking:RadPane>
</telerikDocking:RadPaneGroup>
<telerikDocking:RadPaneGroup >
<telerikDocking:RadPane >
<controls:SpreadView Margin="5,5,5,5" />
</telerikDocking:RadPane>
</telerikDocking:RadPaneGroup>
</telerikDocking:RadSplitContainer>
</telerikDocking:RadDocking>

Docking

answered on 26 Jun 2017

1 answer

157 views

Bar chart with labels inside bars.

Hi,

I'm trying to create an horizontal bar chart with labels inside the bars, close the to right side of the bars, line in labels-inside.png. I have tried several things but the closest I could get to it was the labels right after the bars (see labels-outside.png).

How can I get the labels inside the bars close to the right edge? Is it possible?

Thanks,

Luis Barreira

ChartView

answered on 26 Jun 2017

4 answers

153 views

Problem with pie chart

I've been using ChartView for some time to create charts from a Windows service without problems. The chart control (RadCartesianChart or RadPieChart) is created and initialized in code, and then is rendered to a bitmap.

Ever since I updated the libraries to the latest version, when I try to create a pie chart, the result is always a blank image. The other chart types continue to work as expected.

The code I'm using is the following:

private bool CreatePieChartThread(MemoryStream stream, int width, int height)

{

RadPieChart chart = new RadPieChart

{

Palette = BuildColorPalette(m_chartColors),

SmartLabelsStrategy = new PieChartSmartLabelsStrategy

{

DisplayMode = PieChartLabelsDisplayMode.SpiderAlignedOutwards

}

};

var labelBoxFactory = new FrameworkElementFactory(typeof(TextBlock));

labelBoxFactory.SetValue(FrameworkElement.HorizontalAlignmentProperty, HorizontalAlignment.Center);

labelBoxFactory.SetBinding(TextBlock.TextProperty, new Binding("Label"));

var valueBoxFactory = new FrameworkElementFactory(typeof(TextBlock));

valueBoxFactory.SetValue(FrameworkElement.HorizontalAlignmentProperty, HorizontalAlignment.Center);

valueBoxFactory.SetBinding(TextBlock.TextProperty, new Binding("Value"));

var panelFactory = new FrameworkElementFactory(typeof(StackPanel));

panelFactory.SetValue(StackPanel.OrientationProperty, Orientation.Vertical);

panelFactory.AppendChild(labelBoxFactory);

if (m_showValuesOnPie)

panelFactory.AppendChild(valueBoxFactory);

PieSeries series = new PieSeries

{

ShowLabels = true,

RadiusFactor = 0.75,

AngleRange = new AngleRange(-90, 360),

LabelConnectorsSettings = new ChartSeriesLabelConnectorsSettings()

};

series.LabelDefinitions.Add(new ChartSeriesLabelDefinition

{

Margin = new Thickness(-8, 0, 0, 0),

Template = new DataTemplate { VisualTree = panelFactory }

});

// valores ordenados por nome e sem zeros

foreach (var value in m_data.Where(d => d.AlarmOccurrences > 0).OrderBy(d => d.Name))

{

series.DataPoints.Add(new PieDataPoint

{

Label = value.Name,

Value = value.AlarmOccurrences,

OffsetFromCenter = 0.05,

});

}

chart.Series.Add(series);

PrepareElementForExport(chart, width, height);

ExportExtensions.ExportToImage(chart, stream, new PngBitmapEncoder());

return true;

}

protected void PrepareElementForExport(FrameworkElement element, int width, int height)

{

if (!element.IsInitialized)

{

element.BeginInit();

element.EndInit();

}

element.Measure(Size.Empty);

element.Measure(new Size(width, height));

element.Dispatcher.Invoke(() => { });

element.Arrange(new Rect(0, 0, width, height));

element.UpdateLayout();

}

ChartView

answered on 26 Jun 2017

2 answers

389 views

Problem Selecting row in a radGridview with touchscreen

Hello I have a problem selecting rows in a Radgrid with TOUCHSCREEN. At the start, one row is selected (the blue one, as you can see in the screenshot), but when I click on another row nothing happens (I just see small little circus that I'm tapping on the screen). Everythings works fine if I use a mouse attached to the tablet but doesn't work if I use finger on touchscreen. The desired result is that the row "touched" becomes blue and is the SelectedItem="{Binding SelectedItuGrid.

Just to let you know that the radiobutton and the Button X works with touch after I added this instruction: telerik:TouchManager.IsTouchHitTestVisible ="False"

This is the XAML code:

Please let me know,

thank you.

GridView

answered on 26 Jun 2017

1 answer

105 views

Is it possible to customize HtmlFormatProvider?

Hi,

I am very new to Telerik and I am trying us RichTextBox on my project.

One of the requirement is to export text to HTML5 as responsive.

My thinking is that I need to intercept, customize or subclass HtmlFormatProvider to achieve what I want.

Is intercepting, customizing or subclassing HtmlFormatProvider possible?

Or is there a way to create HTML5 in my way?

Thanks in advance.

Jaeho

RichTextBox

answered on 26 Jun 2017

0 answers

125 views

Sending DragDrop Commands to ViewModel

this is a followup to the question asked here

Wouldnt it be possible to implement it the way gong-wpf-dragdrop does it without breaking mvvm?

i considerthe line below in codebehind to not break mvvm so i could be wrong.

(DataContext as ViewModel).SelectedRecord

The way gong does it is you bind the view model itself, implement an interface and handle the logic using interface implementations.

Would love to be able to handle that logic in my VM rather than using a behavior

DragAndDrop

asked on 23 Jun 2017

3 answers

213 views

RadRichTextBox error with htmlformatprovider

Hello.

I have built a perfectly functional usercontrol, which includes a radrichtextbox with htmldataprovider (pretty nice, pretty easy, works like a charm).

Now I need to expose it to some VB6 client :-/, so as I have done before, I just host it in a winforms form, add some COM interfaces, and it should work all the same (been there, done that...)

Well, no...

It keeps giving me this error:

Value cannot be null. Parameter name: formatProvider

at Telerik.Windows.Documents.FormatProviders.DataProviderBase..ctor(ITextBasedDocumentFormatProvider formatProvider, DependencyProperty stringProperty)
at Telerik.Windows.Documents.FormatProviders.Html.HtmlDataProvider..ctor()
at System.Xaml.Schema.XamlTypeInvoker.DefaultCtorXamlActivator.InvokeDelegate(Action`1 action, Object argument)
at System.Xaml.Schema.XamlTypeInvoker.DefaultCtorXamlActivator.CallCtorDelegate(XamlTypeInvoker type)
at System.Xaml.Schema.XamlTypeInvoker.DefaultCtorXamlActivator.CreateInstance(XamlTypeInvoker type)
at System.Xaml.Schema.XamlTypeInvoker.CreateInstance(Object[] arguments)
at MS.Internal.Xaml.Runtime.ClrObjectRuntime.CreateInstanceWithCtor(XamlType xamlType, Object[] args)
at MS.Internal.Xaml.Runtime.ClrObjectRuntime.CreateInstance(XamlType xamlType, Object[] args)

I tried:

<telerik:HtmlFormatProvider x:Key="HtmlFormatProvider" />

<telerik:HtmlDataProvider RichTextBox="{Binding ElementName=SocialHistoriesHtml}" FormatProvider="{StaticResource HtmlFormatProvider}" Html="{Binding HTML}" />

RichTextBox

answered on 23 Jun 2017

7 answers

245 views

Missing Property causes Filtering and Sorting to no longer work

I'm using RadGridView to show certain properties of a list of elements.
This works as expected as long as all elements in the list have all properties the columns bind to.

But once only one element does not have a property a column binds to the whole columns fails to correctly support sorting and filtering.

When sorting no element is shown at all and the filter dialog does not show any values. See attached screenshots.

This still happens even though a FallbackValue of the right type is provided in the Binding.

Is there a way to make this work? Sadly I can not avoid having some elements that do not implement all properties, so a failing binding most be handled in a better way.

My Xaml:

<Window x:Class="WpfTestApplication.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"

xmlns:telerikG="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.GridView"

xmlns:telerikD="clr-namespace:Telerik.Windows.Data;assembly=Telerik.Windows.Data"

Title="MainWindow" Height="200" Width="300">

<Grid>

<telerikG:RadGridView ItemsSource="{Binding Elements}" AutoGenerateColumns="False">

<telerikG:RadGridView.Columns>

<telerikG:GridViewDataColumn Header="cost" DataMemberBinding="{Binding cost, FallbackValue=0.0}"/>

</telerikG:RadGridView.Columns>

</telerikG:RadGridView>

</Grid>

</Window>

GridView

answered on 23 Jun 2017

5 answers

177 views

Slowdown without internet

Greetings. I'm using 2014.3.1202.45, so it's possible this is already fixed. If the computer has a network connection, but the internet is not working, there is a delay of a few seconds when initializing the map. This happens when calling Map.Providers.Insert. If there is no network connection at all, this problem does not happen. Is there a way to shorten or eliminate this delay from my side or in the code?

Map

answered on 23 Jun 2017