Context Menu Not Firing on Right Click - c#

I have the following ListBox. This works great and when I left click on the TextBlock it opens the recent file. However, when I right click the context menu does not open, instead it acts like a left click and the command LoadSelectedFileCommand fires, opening the recent document. Below is the ListBox XAML:
<ListBox ItemsSource="{Binding RecentFiles, NotifyOnSourceUpdated=True, IsAsync=True, Mode=TwoWay}"
ItemContainerStyle="{StaticResource MenuListBoxItem}"
VerticalAlignment="Stretch"
Grid.Row="6" >
<ListBox.ItemTemplate>
<DataTemplate DataType="{x:Type RecentObjects:RecentFile}">
<StackPanel Orientation="Horizontal">
<CheckBox IsChecked="{Binding IsPinned}"
Style="{StaticResource imageCheckBox}"
ToolTip="{Binding IsPinned, Converter={StaticResource BooleanToVariableStringConverter}}"
DataAccess:DocumentCheckBox.IsCheckedOnData="{DynamicResource Pinned}"
DataAccess:DocumentCheckBox.IsCheckedOffData="{DynamicResource UnPinned}"
AttachedCommand:CommandBehavior.Event="Click"
AttachedCommand:CommandBehavior.Command="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type MahAppsControls:MetroContentControl}}, Path=DataContext.UpdateRecentFilesCommand}" >
</CheckBox>
<TextBlock Text="{Binding FileName}"
Style="{StaticResource MenuTextBlock}"
ToolTip="{Binding FullFileName}"
AttachedCommand:CommandBehavior.Event="MouseDown"
AttachedCommand:CommandBehavior.Command="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type MahAppsControls:MetroContentControl}}, Path=DataContext.LoadSelectedFileCommand}"
AttachedCommand:CommandBehavior.CommandParameter="{Binding FullFileName}">
<TextBlock.ContextMenu>
<ContextMenu>
<MenuItem Header="Open Study" />
<MenuItem Header="Open Containing Folder" />
<MenuItem Header="Remove From List" />
</ContextMenu>
</TextBlock.ContextMenu>
</TextBlock>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
My question is how can I get the context menu to fire on the right click and the command to open on the left click?
Thanks for your time.

If you only want the LoadSelectedFileCommand to run when the left mouse button is clicked you should use the UIElement.MouseLeftButtonDown Event instead.

Related

ProgressBar into ListBoxItem becomes unselectable while performing steps in XAML

I have ListBox dynamically generated. Each item contains a ProgressBar which I can stop, pause or resume by the means of clicking the relative voice on its ContextMenu.
Here is the XAML code:
<ListBox Grid.Column="1" Name="TransfersList" Margin="30,10,-0.444,34.889" ItemsSource="{Binding DataTx}"
SelectionChanged="TransfersList_SelectionChanged" Grid.Row="1" Grid.ColumnSpan="3"
HorizontalContentAlignment="Stretch">
<ListBox.ContextMenu>
<ContextMenu>
<MenuItem Header="Ottieni informazioni" Click="GetInfo" />
<MenuItem Header="Metti in pausa" Click="PauseTransfer" />
<MenuItem Header="Riprendi trasferimento" Click="ResumeTransfer" />
<MenuItem Header="Annulla trasferimento" Click="StopTransfer" />
</ContextMenu>
</ListBox.ContextMenu>
<ListBox.ItemTemplate>
<DataTemplate>
<ProgressBar Height="20" Minimum="0" Maximum="{Binding NChunks}" Name="gasparino_il_carbonaro"
Value="{Binding PbStatus}" Foreground="{Binding Color}" ToolTip="{Binding TooltipInfo}" />
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
When I click, for example, the ContextMenu "GetInfo" voice, I get always the '-1' SelectedIndex (even if I have many bars).
I suppose that the problem is due to the ProgressBar filling (performing steps and so XAML refreshing), when the ProgressBar is filling/refreshing the "system" becomes unable to understand the selected index (which bar I selected with right click?).
My concise question is:
How can I bind the right-clicked bar with the ContextMenuItem relative
method?

WPF Radio button hit area

Hi I have yet another problem with WPF controls. I have a code:
<ListBox Margin="0, 5, 0, 0" ItemsSource="{Binding mySource, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}" SelectionMode="Single">
<ListBox.ItemTemplate>
<DataTemplate>
<!-- Rabio template -->
<RadioButton GroupName="radiosGroup"
Margin="10, 2, 5, 2"
Command="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}, Path=DataContext.SelectedSetting}"
CommandParameter="{Binding SomeId, Mode=OneWay}"
Content="{Binding FileNameWithoutExtensions, Mode=OneWay}" />
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
The problem is that when i hit RadioButton or its label it gets selected. That is fine. But ListBoxItem width is bigger than whole RadioButton hit area and when I click on the right of the control - ListBoxItem selects but its child RadioButton does not. And how to expand the RadioButton hit area?
One idea that i tried was to add a Label as the RadioButton content. It wasn't the best idea because it made my app work slow.
Try this:
<ListBox Margin="0,5,0,0" ItemsSource="{Binding mySource, Mode=OneWay,
UpdateSourceTrigger=PropertyChanged}" SelectionMode="Single"
HorizontalContentAlignment="Stretch"> <!-- New Property Added Here -->
<ListBox.ItemTemplate>
<DataTemplate>
<!-- Rabio template -->
<RadioButton GroupName="radiosGroup"
Margin="10, 2, 5, 2"
Command="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}, Path=DataContext.SelectedSetting}"
CommandParameter="{Binding SomeId, Mode=OneWay}"
Content="{Binding FileNameWithoutExtensions, Mode=OneWay}" />
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
You said:
Unfortunatelly this does not work
Unfortunately, you are mistaken. I have simplified the example and have just tested that it works perfectly (at least in Visual Studio 2010 and .NET 4):
<ListBox ItemsSource="{Binding Collection}" HorizontalContentAlignment="Stretch">
<ListBox.ItemTemplate>
<DataTemplate>
<RadioButton GroupName="Group" Content="{Binding SomeProperty}" />
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
Just try this code out in a new project and you will see that it does work as expected. Therefore, if it does not work in your current project, then you have some other code that is somehow conflicting with this ListBox. Unfortunately, there's really nothing that I can do about that.

How to display a button or label when right clicking on a ListBox item

I'm new to WPF and MVVM, I've build few things, and now tryining to display a delete "button" when user right clicks on a ListBox item.
My listbox looks like this righ now
<ListBox DisplayMemberPath="QUERYNAME"
SelectedValuePath="USERQUERYID"
ItemsSource="{Binding RS.SavedQueryList, UpdateSourceTrigger=PropertyChanged}"
SelectedValue="{Binding RS.SelectedValue, UpdateSourceTrigger=PropertyChanged}"
Height="300" HorizontalAlignment="Left" Name="listBox2" VerticalAlignment="Top" Width="101" Margin="521,74,0,0" TabIndex="0">
Thanks
You can add the button and label (in fact, any element you want) to a ContextMenu and assign that ContextMenu to ListBoxItems. For example, in my Window, I'll have something like this:
<Window.Resources>
<Style TargetType="{x:Type ListBoxItem}">
<Setter Property="ContextMenu">
<Setter.Value>
<ContextMenu>
<StackPanel Orientation="Horizontal" VerticalAlignment="Center">
<TextBlock Text="Delete This Item" Margin="10"/>
<Button Content="Delete"/>
</StackPanel>
</ContextMenu>
</Setter.Value>
</Setter>
</Style>
</Window.Resources>
This will use the power of Styles to apply a customized ContextMenu to all ListBoxItems the window. After that you can bind Button.Command to your ViewModel.
<ListBox DisplayMemberPath="QUERYNAME"
SelectedValuePath="USERQUERYID"
ItemsSource="{Binding RS.SavedQueryList, UpdateSourceTrigger=PropertyChanged}"
SelectedValue="{Binding RS.SelectedValue, UpdateSourceTrigger=PropertyChanged}"
Height="300" HorizontalAlignment="Left" Name="listBox1" VerticalAlignment="Top" Width="101" Margin="521,74,0,0" TabIndex="0">
<ListBox.ContextMenu>
<ContextMenu>
<MenuItem Header="Delete">
<MenuItem.Icon>
<Image Width="16" Height="16" Source="pack://application:,,,/Img/Delete.png" />
</MenuItem.Icon>
</MenuItem>
</ContextMenu>
<ListBox.ContextMenu>
</ListBox>
Obviously you'll need to use some Command with your MenuItem...
you can do that by using the MVVM light behavior EventToCommand see http://msdn.microsoft.com/en-us/magazine/dn237302.aspx
Set the event to MouseRightButtonUp

Command binding doesn't function if its inside an item template of a listbox

I have the following user control
<ListBox ItemsSource="{Binding Persons}"
SelectedItem="{Binding SelectedPerson}"
VerticalAlignment="Top" Width="166" >
<ListBox.Template>
<ControlTemplate>
<StackPanel >
<ItemsPresenter/>
<Button Content="Add" Background="Transparent" Command="{Binding NewItemCommand}"/>
</StackPanel>
</ControlTemplate>
</ListBox.Template>
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<Button Height="16" Width="16" Background="Transparent" Command="{Binding DeleteItemCommand}">
<Image Source="images/delete-icon.png" />
</Button>
<TextBlock Text="{Binding Name}"/>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
and i have a view model for it with two commands, the first command that you can see above NewItemCommand is working fine, how ever the second command DeleteItemCommand doesn't function.
is it because its in the item template?
Yes, this is because the DataContext for the ItemTemplate is the Item from Persons not the ViewModel
To bind the DeleteItemCommand on each item you will need to bind back to the ViewModel that is holding the command
Example, binding to the DataContext of the ListBox
<Button Command="{Binding Path=DataContext.DeleteItemCommand, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ListBox}}}" />
Edit:
If you want to remove the item that the button was clicked on you can pass the item the button belongs to as the CommandParameter and handle that in your comman, Not sure what type of command you are using but this is simple if you are using RelayCommand or DelegateCommand
<Button Command="{Binding Path=DataContext.DeleteItemCommand, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ListBox}}}"
CommandParameter="{Binding}" />
public MainWindow()
{
InitializeComponent();
DeleteItemCommand = new RelayCommand(person => DeletePerson(person as Person));
}
private void DeletePerson(Person person)
{
Collection.Remove(person);
}

add command on ItemTemplate selection

This is a pretty easy question I think , but I can't find the answer. I have an itemtemplate defined into a datatemplate. When an item is selected, I wanna trigger a command to select the name of my element and apply it somewhere else. For the moment the MouseDown event doesn't accept my command.
<ListView Margin="4" Grid.Row="1" Grid.ColumnSpan="2" ItemsSource="{Binding Path=ExistingStateInfos, ElementName=Window}"
SelectedItem="{Binding Path=SelectedStateInfo, ElementName=Window}" x:Name="statinfoListview">
<ListView.ItemTemplate>
<DataTemplate DataType="{x:Type States:StateInfo}">
<TextBlock Text="{Binding Path=Name}" MouseDown="{x:Static MyWindow.ApplyStateInfoNameToStateCommand}" />
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
You can't set a command directly to an event handler.
Use EventToCommand from the MVVM LightToolkit
<DataTemplate DataType="{x:Type States:StateInfo}">
<TextBlock Text="{Binding Path=Name}">
<i:Interaction.Triggers>
<i:EventTrigger EventName="MouseDown">
<Command:EventToCommand Command="{Binding YourCommand, Mode=OneWay}" />
</i:EventTrigger>
</i:Interaction.Triggers>
</TextBlock>
</DataTemplate>
In fact ot was bulshit from me, I just add to do
<TextBlock Text="{Binding Path=Name}" MouseDown="{x:Static ApplyStateInfoNameToState_Click}" />
Sorry it's friday. Have a nice weekend :)

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