Questions on UI for WPF Forum

1 answer

405 views

DateTimePicker shows min value in calender

Hi,
DateTimePicker shows a min value as 1/1/0001 in calender.How to default it to as todays date.
In other case, if i am not selecting any date from datepicker, datetime property holds the mindate value.How to make this as empty string.
I am using MVVM pattern,

DatePicker

answered on 14 Jul 2011

3 answers

128 views

updating the multiSelectBehvior form the view model

Hi there.

So if you reference this post, http://www.telerik.com/community/forums/wpf/gridview/add-to-selecteditems-via-behavior.aspx you will see that Maya gave us some sample code with the custom behavior that lets us manipulate the selected items of a gridview from the code behind, i.e. changing the selected items list shows up on the grid as selected. the only problem is that we are changing the list of items that the SelectedItems property is bound to inside of the view model and not on the code behind for the page so we can't say something like

//This is from the window.xaml.cs file

((MyDataContext)

this.LayoutRoot.DataContext).SelectedItems.Add(((MyDataContext)this.LayoutRoot.DataContext).Data.Where(x => x.ID == 4).First());

Any ideas on how we can make this work? I tried something like this in the view model

//This is from the view model

public

LineItem SelectedItem

{

get

{

return selectedItem;

}

set

{

selectedItem = value;

selectedItems.Clear();

var list = Data.Where(x => x.OrderId == value.OrderId);

foreach (var lineItem in list)

{

SelecedItems.Add(lineItem);

}

OnPropertyChanged("SelectedItem");

}

but that doesn't work. There is something I am missing here, some sort of notification is taking place when you say - MyRadGridView.SelecedItems.Add() that doesn't take place from the view model even thought they are the same collection of objects. If I could figure out what that is maybe I could figure out how to make this thing work.

Thanks for any help or suggestions...

GridView

answered on 14 Jul 2011

1 answer

225 views

Combobox Drag and Drop

Hi

Can we drag item from combobox?

Thanks

ComboBox

answered on 14 Jul 2011

0 answers

86 views

Grid Sorting and Filtering Not working while using MultipleStringConvertor

Hi,
Grid Sorting and Filtering Not working while using MultipleStringConvertor in DataGridColumn. Need help on the same please asap.

GridView

asked on 14 Jul 2011

2 answers

334 views

Programatically modifying a RadDocument prior to assigning it to a RadRichTextBox

For a proof of concept linked to my question described here (see my last post) I have begun experimenting with modifying a deserialized RadDocument prior to assigning it to the control. The idea behind this is to store links to external resources using the standard HyperlinkRangeStart-HyperLink-HyperlinkRangeStop concept and transforming those hyperlinks into custom controls hosted in InlineUIContainer objects.To test if this can work I've tried the following:

var doc = provider.Import(xml);

var hyperLinks = doc.EnumerateChildrenOfType<HyperlinkRangeStart>();
foreach (var link in hyperLinks)
{
var parent = link.Parent;
parent.Children.Remove(link);

InlineUIContainer container = new InlineUIContainer(new Button(), new Size(400, 300));
parent.Children.Add(container);
}

doc.History.Clear();

// BOOOM
doc.UpdateLayout();

This will crash in UpdateLayout or when I assign the document to a RadRichTextBox with the following exception:

InvalidOperationException "Stack Empty"

" at System.Collections.Generic.Stack`1.Pop()\r\n at Telerik.Windows.Documents.Layout.LayoutBox.UpdateFieldProperties(DocumentElement element, Stack`1 fieldStartsStack) in c:\\TB\\101\\WPF_Scrum\\Release_WPF_40\\Sources\\Development\\Documents\\Layout\\LayoutBox.cs:line 541\r\n at Telerik.Windows.Documents.Layout.LayoutBox.UpdateFieldProperties(DocumentElement element, Stack`1 fieldStartsStack) in c:\\TB\\101\\WPF_Scrum\\Release_WPF_40\\Sources\\Development\\Documents\\Layout\\LayoutBox.cs:line 524\r\n at Telerik.Windows.Documents.Layout.LayoutBox.UpdateFieldProperties(DocumentElement element, Stack`1 fieldStartsStack) in c:\\TB\\101\\WPF_Scrum\\Release_WPF_40\\Sources\\Development\\Documents\\Layout\\LayoutBox.cs:line 524\r\n at Telerik.Windows.Documents.Layout.LayoutBox.UpdateFieldProperties(DocumentElement element) in c:\\TB\\101\\WPF_Scrum\\Release_WPF_40\\Sources\\Development\\Documents\\Layout\\LayoutBox.cs:line 520\r\n at Telerik.Windows.Documents.Layout.DocumentLayoutBox.UpdateGlobalProperties() in c:\\TB\\101\\WPF_Scrum\\Release_WPF_40\\Sources\\Development\\Documents\\Layout\\DocumentLayoutBox.cs:line 276\r\n at Telerik.Windows.Documents.Layout.DocumentLayoutBox.MeasureOverride(SizeF availableSize) in c:\\TB\\101\\WPF_Scrum\\Release_WPF_40\\Sources\\Development\\Documents\\Layout\\DocumentLayoutBox.cs:line 259\r\n at Telerik.Windows.Documents.Layout.LayoutElement.MeasureCore(SizeF availableSize) in c:\\TB\\101\\WPF_Scrum\\Release_WPF_40\\Sources\\Development\\Documents\\Layout\\LayoutElement.cs:line 1473\r\n at Telerik.Windows.Documents.Layout.LayoutElement.Measure(SizeF availableSize) in c:\\TB\\101\\WPF_Scrum\\Release_WPF_40\\Sources\\Development\\Documents\\Layout\\LayoutElement.cs:line 1352\r\n at Telerik.Windows.Documents.Layout.ContextLayoutManager.UpdateLayout() in c:\\TB\\101\\WPF_Scrum\\Release_WPF_40\\Sources\\Development\\Documents\\Layout\\ContextLayoutManager.cs:line 360\r\n at Telerik.Windows.Documents.Layout.LayoutElement.UpdateLayout() in c:\\TB\\101\\WPF_Scrum\\Release_WPF_40\\Sources\\Development\\Documents\\Layout\\LayoutElement.cs:line 982\r\n at Telerik.Windows.Documents.Model.RadDocument.UpdateLayout() in c:\\TB\\101\\WPF_Scrum\\Release_WPF_40\\Sources\\Development\\Documents\\Model\\RadDocument.cs:line 706\r\n at Mindspace.DocumentEditors.RichTextDocumentEditor.<SetEditorContent>b__3() in C:\\Users\\oliver\\Projects\\Mindspace\\SilverlightClient\\DocumentEditors\\RichTextDocumentEditor.cs:line 296"

RichTextBox

answered on 14 Jul 2011

5 answers

192 views

Problem with TileState Converter

Hi, I am working on an application based on RadTileView, similar to the 'Example' that Telerik provides in

http://www.telerik.com/help/wpf/radtileview-howto-use-fluidcontentcontrol-in-tileview.html

My problem is that raises an exception when TileState property has to be bound through 'tileStateConverter'. If I change the value to Maximized, Minimized o Restored does not crash. The exception is a XamlParseException: A error raises when setting the property ''. (More or less cause the text is displayed to me in Spanish).

Here is the xaml file:

<UserControl.Resources>

<local:FluidContentStateConverter x:Key="fluidContentStateConverter" />

<local:TileStateConverter x:Key="tileStateConverter" />

<SolidColorBrush x:Key="Pad_BorderBrush" Color="#FF242699"/>

<SolidColorBrush x:Key="Pad_Background" Color="#FFFFFF"/>

<SolidColorBrush x:Key="Pad_Header_Background" Color="#FF242699"/>

<Style x:Key="DefaultHeaderedContentControlStyle" TargetType="telerik:HeaderedContentControl">

<Setter Property="BorderThickness" Value="1 0 1 1"/>

<Setter Property="BorderBrush" Value="{StaticResource Pad_BorderBrush}"/>

<Setter Property="Background" Value="{StaticResource Pad_Background}"/>

<Setter Property="Foreground" Value="White"/>

<Setter Property="FontWeight" Value="Bold"/>

<Setter Property="Template">

<Setter.Value>

<ControlTemplate TargetType="telerik:HeaderedContentControl">

<Grid>

<Grid.RowDefinitions>

<RowDefinition Height="Auto"/>

<RowDefinition Height="*"/>

</Grid.RowDefinitions>

<Border Background="{StaticResource Pad_Header_Background}" CornerRadius="4 4 0 0" Padding="10 7" Grid.Row="0">

<ContentPresenter ContentTemplate="{TemplateBinding HeaderTemplate}" Content="{TemplateBinding Header}"/>

</Border>

<Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" CornerRadius="0 0 4 4" Grid.Row="1">

<ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>

</Border>

</Grid>

</ControlTemplate>

</Setter.Value>

</Setter>

</Style>

<DataTemplate x:Key="ItemTemplate">

<TextBox Text="{Binding Login}" />

</DataTemplate>

<DataTemplate x:Key="ContentTemplate">

<telerik:RadFluidContentControl ContentChangeMode="Manual" State="{Binding ContentState, Converter={StaticResource fluidContentStateConverter}}">

<telerik:RadFluidContentControl.SmallContent>

<TextBlock Text="Peque"></TextBlock>

</telerik:RadFluidContentControl.SmallContent>

<telerik:RadFluidContentControl.Content>

<TextBlock Text="Normal"></TextBlock>

</telerik:RadFluidContentControl.Content>

<telerik:RadFluidContentControl.LargeContent>

<TextBlock Text="Big"></TextBlock>

</telerik:RadFluidContentControl.LargeContent>

</telerik:RadFluidContentControl>

</DataTemplate>

<Style x:Key="ItemContainerStyle" TargetType="telerik:RadTileViewItem">

<Setter Property="TileState" Value="{Binding ContentState, Mode=TwoWay, Converter={StaticResource tileStateConverter}}" />

</Style>

</UserControl.Resources>

<Grid x:Name="LayoutRoot" Background="{StaticResource FondoMalva}">

<Grid.ColumnDefinitions>

<ColumnDefinition Width="*" />

<ColumnDefinition Width="150" />

<ColumnDefinition Width="*" />

</Grid.ColumnDefinitions>

<telerik:HeaderedContentControl Height="300" HorizontalAlignment="Center" Width="Auto" VerticalAlignment="Center" Name="HeaderedControlUsers" Style="{StaticResource DefaultHeaderedContentControlStyle}"

Header="Users">

<telerik:RadTileView Name="RadTileViewUsers"

ContentTemplate="{StaticResource ContentTemplate}"

ItemContainerStyle="{StaticResource ItemContainerStyle}"

ItemTemplate="{StaticResource ItemTemplate}"

MinimizedColumnWidth="200"

MinimizedItemsPosition="Right"

MinimizedRowHeight="200"/>

</telerik:HeaderedContentControl>

And here the converter for TileState property:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows.Data;

using Telerik.Windows.Controls;

namespace NCOP_Mgt

{

public class TileStateConverter : IValueConverter

{

public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)

{

var contentState = (ContentState)value;

switch (contentState)

{

case ContentState.SmallContent:

return TileViewItemState.Minimized;

case ContentState.NormalContent:

return TileViewItemState.Restored;

case ContentState.LargeContent:

return TileViewItemState.Maximized;

default:

return TileViewItemState.Restored;

}

public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)

{

var tileState = (TileViewItemState)value;

switch (tileState)

{

case TileViewItemState.Minimized:

return ContentState.SmallContent;

case TileViewItemState.Restored:

return ContentState.NormalContent;

case TileViewItemState.Maximized:

return ContentState.LargeContent;

default:

return ContentState.NormalContent;

}

I do know what is happening because for FluidContentStateConverter and its conversion seems is fine..
Thank so much (in advance).

Eduardo

TileView

answered on 14 Jul 2011

5 answers

185 views

Unable to get status to chnage to DropComplete

I have used the example to drag windows explorer files by enabling the EnableNativeDrag option. I added my DropQuery and DropInfo handlers and they seem to be firing fine but the status is always DragPossible. I am dragging a file from my desktop to a ListView with a GridView, GridViewColumns and CellTemplates defined. I have allowed drop on both the ListView and ListViewItems and nothing seems to allow the status to change to DropComplete. Help!

RadDragAndDropManager.SetAllowDrop(theListView, true);

RadDragAndDropManager.AddDropQueryHandler(theListView, OnAttachmentsDropQuery);

RadDragAndDropManager.AddDropInfoHandler(theListView, OnAttachmentsDropInfo);

protected virtual void OnAttachmentsDropInfo(object sender, DragDropEventArgs e)

{

if (e.Options.Status == DragStatus.DropComplete)

{

StringCollection fileList = e.Options.DropDataObject.GetFileDropList();

foreach (string file in fileList)

{

//Take only the file name.

string

fileName = file.Substring(file.LastIndexOf(System.IO.Path.DirectorySeparatorChar) + 1, file.Length - file.LastIndexOf(System.IO.Path.DirectorySeparatorChar) - 1);                }

}

private void OnAttachmentsDropQuery(object sender, DragDropQueryEventArgs e)

{

e.QueryResult = e.Options.DropDataObject != null && e.Options.DropDataObject.ContainsFileDropList();

}

Rod Yager

DragAndDrop

answered on 14 Jul 2011

2 answers

78 views

Pages in wrong order

Hi,

sometimes, when paging fast through the items in the RadCarousel, the pages seem to have the wrong order: The topmost page is overlaped by a page that is further in the background. This behaviour is best reproducible by paging with the mouse wheel forward and backward fast.
I can reproduce this even in the "First Look" example in the Telerik WPF Demos(Q1/2011).

I've looked at the Z-order of the items: it's not correct.

Is there a way to get around this?

Greetings,
J.S.

Carousel

answered on 14 Jul 2011

3 answers

129 views

[Solved] Can I disable a RadTreeViewItem but still have its children enabled?

I have a hierarchy of items and when I double click one item I asynchronously open the document represented by that item in a working area. During the (potentially) long open action I disable that item so the user can't double click it again, or rename it or delete it etc.

However I've seen that its children also get disabled by this and I don't want this.

Can I just disable one item without having its children disabled?

TreeView

answered on 14 Jul 2011

1 answer

199 views

Rendering artifacts with WPF 4 TextFormattingMode

Using WPF4's TextOptions.TextFormattingMode="Display" to improve overall text clarity seems introduce rendering artifacts with the RadRichTextBox as shown in the screenshot. Since in my opinion TextOptions.TextFormattingMode="Display" greatly improves the overall impression of a WPF app it would be nice if the RadRichTextBox would handle this correctly.

http://www.flickr.com/photos/47457340@N06/5914179061/

RichTextBox

answered on 14 Jul 2011