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RadDragAndDropManager

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DragAndDrop

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answered on 11 Sep 2011, 09:52 AM

here's the code. The list box has the following handlers added in code behind, the whole page has been working fine until I installed the Q2 update??



            RadDragAndDropManager.AddDragQueryHandler(memberList, onListBoxDragQuery);

            RadDragAndDropManager.AddDragInfoHandler(memberList, onListBoxDragInfo);

 



<

UserControl xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"

x:Class="WAC_Races_WPF.View.RaceDay"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

xmlns:telerikDragDrop="clr-namespace:Telerik.Windows.Controls.DragDrop;assembly=Telerik.Windows.Controls"

mc:Ignorable="d" d:DesignHeight="240" d:DesignWidth="650">

<Grid>

<telerik:RadDocking

BorderBrush="{x:Null}"

BorderThickness="0"

Padding="0">

<telerik:RadDocking.DocumentHost>

<telerik:RadSplitContainer

Orientation="Horizontal">

<telerik:RadPaneGroup>

<telerik:RadPane>

<Grid>

<Grid.RowDefinitions>

<RowDefinition Height="40"/>

<RowDefinition/>

</Grid.RowDefinitions>

<telerik:RadGridView Grid.Row="1"

x:Name="resultsView"

ShowColumnFooters="True"

IsFilteringAllowed="False"

CanUserDeleteRows="True"

CanUserReorderColumns="False"

ShowGroupPanel="False"

telerikDragDrop:RadDragAndDropManager.AllowDrop="True"

ItemsSource="{Binding Path=CurrentRace.Results}"

AutoGenerateColumns="False">

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn

DataMemberBinding="{Binding MemberName}"

Header="Member Name"

IsReadOnly="True">

<telerik:GridViewDataColumn.AggregateFunctions>

<telerik:CountFunction Caption="Members: "/>

</telerik:GridViewDataColumn.AggregateFunctions>

</telerik:GridViewDataColumn>

<telerik:GridViewDataColumn

DataMemberBinding="{Binding Cost}"

Header="Charge"

IsReadOnly="True" DataFormatString="{}{0:c}">

<telerik:GridViewDataColumn.AggregateFunctions>

<telerik:SumFunction ResultFormatString="{}Total:{0:c}"/>

</telerik:GridViewDataColumn.AggregateFunctions>

</telerik:GridViewDataColumn>

<telerik:GridViewDataColumn

DataMemberBinding="{Binding Handicap, Mode=TwoWay}"

Header="Handicap Grp"/>

<telerik:GridViewMaskedTextBoxColumn

DataMemberBinding="{Binding HandicapString}"

Header="Start Time"

MaskType="DateTime"

Mask="mm-ss" />

<telerik:GridViewMaskedTextBoxColumn

DataMemberBinding="{Binding rTime}"

Header="Stop Watch Time"

IsVisible="{Binding ElementName=tbStopWatch, Path=IsChecked}"

>

<telerik:GridViewMaskedTextBoxColumn.CellTemplate>

<DataTemplate>

<telerik:RadMaskedTextBox Value="{Binding rTime}"

MaskType="DateTime"

Mask="HH:mm:ss"/>

</DataTemplate>

</telerik:GridViewMaskedTextBoxColumn.CellTemplate>

<telerik:GridViewMaskedTextBoxColumn.CellEditTemplate>

<DataTemplate>

<telerik:RadMaskedTextBox Value="{Binding rTime, Mode=TwoWay}"

Mask="{Binding Path=HourMask}"

MaskType="DateTime"/>

</DataTemplate>

</telerik:GridViewMaskedTextBoxColumn.CellEditTemplate>

</telerik:GridViewMaskedTextBoxColumn>

</telerik:RadGridView.Columns>

</telerik:RadGridView>

</Grid>

</telerik:RadPane>

</telerik:RadPaneGroup>

</telerik:RadSplitContainer>

</telerik:RadDocking.DocumentHost>

<telerik:RadSplitContainer

InitialPosition="DockedLeft">

<telerik:RadPaneGroup>

<telerik:RadPane CanUserClose="False">

<Grid>

<Grid.RowDefinitions>

<RowDefinition Height="30"/>

<RowDefinition/>

</Grid.RowDefinitions>

<Grid>

<Grid.ColumnDefinitions>

<ColumnDefinition Width="Auto"/>

<ColumnDefinition/>

</Grid.ColumnDefinitions>

<Label Content="Search" FontWeight="Bold" Grid.Column="0"/>

<TextBox x:Name="txtFilter" Grid.Column="1"

Text="{Binding Path=FilterText, Mode=TwoWay}"

TextChanged="txtFilter_TextChanged"/>

</Grid>

<ListBox Margin="10,10,10,10"

Grid.Row="1"

x:Name="memberList"

ItemsSource="{Binding Path=FilterMembers}"

VerticalAlignment="Stretch"

HorizontalAlignment="Stretch"

HorizontalContentAlignment="Stretch"

telerikDragDrop:RadDragAndDropManager.AllowDrag="True"

>

<ListBox.ItemTemplate>

<DataTemplate>

<Border BorderBrush="DarkGray" BorderThickness="1" Padding="2" Margin="1">

<Grid>

<Grid.RowDefinitions>

<RowDefinition Height="15" />

<RowDefinition Height="14" />

</Grid.RowDefinitions>

<Grid.ColumnDefinitions>

<ColumnDefinition Width="90" />

<ColumnDefinition Width="Auto" />

</Grid.ColumnDefinitions>

<TextBlock Grid.ColumnSpan="2" Grid.Row="0" Text="{Binding Path=FullName}" FontWeight="Bold"/>

<TextBlock Grid.Column="0" Grid.Row="1" Text="{Binding Path=MembershipString}" />

<TextBlock Grid.Column="1" Grid.Row="1" Text="{Binding Path=mGrpID}" />

</Grid>

</Border>

</DataTemplate>

</ListBox.ItemTemplate>

<ListBox.ItemContainerStyle>

<Style TargetType="ListBoxItem">

<Setter Property="telerikDragDrop:RadDragAndDropManager.AllowDrag" Value="True" />

<Setter Property="telerikDragDrop:RadDragAndDropManager.AllowDrop" Value="True" />

</Style>

</ListBox.ItemContainerStyle>

</ListBox>

</Grid>

</telerik:RadPane>

</telerik:RadPaneGroup>

</telerik:RadSplitContainer>

</telerik:RadDocking>

</Grid>

</UserControl>

answered on 13 Sep 2011, 09:01 AM

Hello Michael,

Since Q2 we have introduced new API with improved support in many scenarios(http://www.telerik.com/help/wpf/dragdropmanager-overview.html). The events of the RadDragAndDropManager are still executed, however the new drag mechanism is used.

The problem you are facing is due to the fact that WPF listbox captures the mouse on mouseleftbutton down and thus suppress DragDropManager drag mechanism.

There are several solutions to this issue:

- Set drag execution mode to legacy - http://www.telerik.com/help/wpf/raddragdropmanager-howto-change-drag-execution-mode.html

- Add DragDropManager.AllowCapturedDrag="true" in addition to RadDragAndDropManager.AllowDrag="true"

Let us know if you have any further issues regarding this.

Kind regards,
Tsvyatko
the Telerik team

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