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WPF: template or UserControl with 2 (or more!) ContentPresenters to present content in 'slots'
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Closed 3 years ago.
I have a custom ControlTemplate for a WPF TabControl that adds Buttons to the left and right hand side of the TabItem header. At the moment this is not a named part as the button commands are bound in the ControlTemplates XAML and do not need to be exposed outside of the ControlTemplate.
This works fine for a button but what if I want to add content to the left (or right) hand side of the TabItemHeaders which can be bound outside of the ControlTemplate so that my TabControl becomes more flexible?
My idea was to subclass the TabControl and have two named parts in the ControlTemplate and expose these as properties of the new control; CustomTabControl.LeftContentArea and CustomTabControl.RightContentArea respectively. Each named part is a ContentPresenter and each ContentPresenters Content property is exposed by the properties named above.
However, when I tried this I was unable to put content into the left and right content areas.
Edit: Just to be clear I have included an image. The red rectangles show where I want to be able to place extra content.
Update: Below is a screen shot of the progress I have made so far, hopefully this will help explain my problem a bit more.
The screen shot shows my custom Tab Control with two blank tabs and three buttons that are currently on the right hand side of the TabItem header area. The buttons are currently defined in the TabControls custom ControlTemplate I.E. there is a ColumnDefinition within the ControlTemplates Grid which contains a StackPanel that hosts 3 buttons.
What I am looking for is a way to allow the consumer of the tab control decide what content goes in the area next to the tabs. E.G. the user should be able to do something like this:
<local:CustomTabControl>
<local:CustomTabControl.RightContentArea>
<!-- This can be changed to ANY content that the user wants -->
<StackPanel Orientation="Horizontal">
<Button Content="Test" />
<Button Content="Test" />
<Button Content="Test" />
</StackPanel>
</local:CustomTabControl.RightContentArea>
<!-- TabItems are added as normal -->
<TabItem Header="Tab One" />
<TabItem Header="Tab Two" />
</local:CustomTabControl>
I tried a different (lazy) way, which was to create another grid that occupies the same space as the TabControl, ie both are in Grid.Row=0. I have bound the grid height to the height of the first tab so if the tabs change height the other controls will remain centered. I set MinWidth on the window so the controls dont overlap the tabs.
Paste this code into a new WPF Window...
<Window x:Class="MainWindow"
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"
mc:Ignorable="d"
Title="MainWindow" Height="306" Width="490" MinWidth="300">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<TabControl Grid.Row="0" x:Name="tabControl">
<TabItem x:Name="tabItem" Header="TabItem" Height="50">
<Grid Background="#FFE5E5E5"/>
</TabItem>
<TabItem Header="TabItem">
<Grid Background="#FFE5E5E5"/>
</TabItem>
</TabControl>
<Grid Grid.Row="0" Height="{Binding ActualHeight, ElementName=tabItem}"
VerticalAlignment="Top" Margin="0,2,0,0">
<StackPanel Orientation="Horizontal" HorizontalAlignment="Right"
VerticalAlignment="Center" Margin="20,0">
<TextBlock VerticalAlignment="Center" Margin="10,0" FontSize="16"
Foreground="Red" FontFamily="Calibri">My Text</TextBlock>
<Button Content="My Button" />
</StackPanel>
</Grid>
</Grid>
</Window>
...and you will get this:
Depending on how much flexibility you need there are some methods that are suited better than others, i myself try to use DynamicResources if possible because it is normally less troublesome than creating new user-controls.
Here's an example of how to add additional content to the left of the Tab-Header:
<TabControl>
<TabControl.Resources>
<DataTemplate x:Key="AugmentedTabItem">
<StackPanel Orientation="Horizontal">
<ContentPresenter Content="{DynamicResource ContentLeft}" Margin="0,0,5,0"/>
<ContentPresenter Content="{Binding}"/>
</StackPanel>
</DataTemplate>
</TabControl.Resources>
<TabItem Header="ÜberTab" HeaderTemplate="{StaticResource AugmentedTabItem}">
<TabItem.Resources>
<TextBlock x:Key="ContentLeft" Text=">>>" Foreground="Blue"/>
</TabItem.Resources>
</TabItem>
</TabControl>
Hope that helps, if something is unclear or if this doesn't suffice, drop a comment.
Related
I was working with WinForms and I am kind of new in WPF, I want to insert a vertical scrollbar to see all the elements content in my TabItems, this is my previous WinForm and this is my new WPF: I have implemented the following xaml-code:
<StackPanel Grid.Row="0" Grid.Column="0"
Orientation="Horizontal" Margin="0,0,0,199.2">
<TabControl x:Name="tabControl">
<TabItem Header="1" Background="#008000"/>
<TabItem Header="2" Background="#1e90ff"/>
<TabItem Header="3" Background="#bd3f02"/>
<ScrollBar></ScrollBar>
</TabControl>
</StackPanel>
Depending on what you want to display inside of your tabs, your issue might be solved by using a suitable items control which comes with a ScrollViewer out-of-the-box. Since I do not know your exact use case, I present you a general solution. From the images that you provided you want your tab content to be scrollable. To achieve this, remove the ScrollBar and place a ScrollViewer into each of the tabs that you want to scroll.
<StackPanel Grid.Row="0" Grid.Column="0" Orientation="Horizontal" Margin="0,0,0,199.2">
<TabControl x:Name="tabControl">
<TabItem Header="1" Background="#008000">
<ScrollViewer>
<!-- Your tab content here -->
</ScrollViewer>
</TabItem>
<TabItem Header="2" Background="#1e90ff"/>
<TabItem Header="3" Background="#bd3f02"/>
</TabControl>
</StackPanel>
The vertical scrollbar will be shown if the content exceed its container by default. If you want to display it always, set the VerticalScrollBarVisibility property to Visible.
<ScrollViewer VerticalScrollBarVisibility="Visible">
What you might want to try is encapsulating the content in a ScrollViewer like so :
<StackPanel>
<ScrollViewer>
<Grid>
<!-- YOUR CONTENT HERE -->
</Grid>
</ScrollViewer>
</StackPanel>
This is my WPF UserControl code reduced to the relevant part:
<UserControl x:Class="AKPS.View.UserCalibWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
>
<StackPanel Orientation="Horizontal" HorizontalAlignment="Right" Width="1600" >
<Button Height="45" Width="100" />
<Button Height="45" Width="100" />
</StackPanel>
Why do the 2 buttons display on the left?
You are having a Width for your StackPanel removing that will align your stack panel to right with your controls in it.
<StackPanel Orientation="Horizontal" HorizontalAlignment="Right" >
<Button Height="45" Width="100" />
<Button Height="45" Width="100" />
</StackPanel>
A StackPanel does exactly that - it stacks elements together, in your case, horizontally. Your HorizontalAlignment is referring to the stack panel, which will shift it to the right, not the buttons inside them.
Instead, perhaps try using a Grid instead of a StackPanel, and then placing your StackPanel (with no Width element set) inside it.
HorizontalAlignment controls the container's alignment.
Try HorizontalContentAlignment instead.
As Abin indicated, in my haste I'd forgotten StackPanel doesn't have a HorizontalContentAlignment property.
You could achieve similar functionality with a DockPanel though, or use Abin's solution.
I'm newbie with Wpf application i have this interface
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:Alg="clr-namespace:AS.Views.DeformableModel"
xmlns:Controls="clr-namespace:Assergs.Windows.Controls;assembly=Assergs.Windows" x:Class="AS.Window1"
Title="Window1"
>
<Grid Margin="0,0,2,0">
<Controls:RibbonPanel Header="Menu" HorizontalAlignment="Left" Margin="0,0,0,31.405" Width="213.388">
<TreeView Width="210.449" HorizontalAlignment="Left" Margin="0,0,0,-1.515"/>
</Controls:RibbonPanel>
<StatusBar Margin="0,472.595,0,0.972" VerticalAlignment="Bottom">
<Label Content="Pret" Height="41.433" Width="36.737"/>
</StatusBar>
<StackPanel Margin="213.388,0,0,31.405">
<Image Height="473.5" Source="image-interface2.jpg"/>
</StackPanel>
</Grid>
</Window>
i got as a result:
as you saw, there is many design error i need to know :
How can i display the image at the full stackpanel space ?
why the RibbonPanel controller disappeared?
How can i change my snippet to make all controller's size depending to the size of the window (image,treeview...)
I think you should to know about wpf's panels and layouts. The grid is an excellent panel and you can get almost any common layout. But for getting this you should works with columns and rows (not only with margins and vertical/horizontal orientations). The stack panel is not the best control for stretching an image: if the stackpanel's orientation is vertical the item'a height is the item's desired height, and if the orientation is horizontal, the item's width is the item's desired width, so, if you want to stretch the image you can group it inside a content control, or (if there is no more controls) do not group.
I suggest you to use a dockpanel, the dock panel alows you put the items in the locations top, right, bottom and left:
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:Alg="clr-namespace:AS.Views.DeformableModel"
xmlns:Controls="clr-namespace:Assergs.Windows.Controls;assembly=Assergs.Windows" x:Class="AS.Window1"
Title="Window1"
>
<DockPanel Margin="0,0,2,0">
<Controls:RibbonPanel DockPanel.Dock="Left" Header="Menu" Width="213.388">
<TreeView /> <!--The tree view will be vertican and horizontally stretch-->
</Controls:RibbonPanel>
<StatusBar DockPanel.Dock="Bottom" Height="41.433">
<Label Content="Pret" Width="36.737"/>
</StatusBar>
<Image Stretch="UniformToFill" Source="image-interface2.jpg"/> <!--The last item take all aviable space-->
</DockPanel>
</Window>
Hope this helps...
Read about Layout Containers.
http://www.codeproject.com/Articles/140613/WPF-Tutorial-Layout-Panels-Containers-Layout-Trans
In your case you may use dock panel as parent panel.
Use Grid or Border instead panels. (I have not tested this code)
<DockPanel Margin="0,0,2,0">
<Grid DockPanel.Dock="Bottom">
<Label Content="Pret" Height="41.433"/>
</Grid>
<Grid DockPanel.Dock="Left" Width="213">
<TreeView Width="210.449" HorizontalAlignment="Left"/>
</Grid>
<Grid>
<Image Source="image-interface2.jpg" Stretch="Fill"/>
</Grid>
</Grid>
I don't know how this works technically but my requirement is as follows. I have a DataGrid and to input data into the DataGrid, I want a panel at the bottom of the DataGrid that slides out on a button click showing input options. Except, as the panel slides out, the DataGrid has to resize vertically as well. Can someone throw some light on how I can implement this?
You should be able to use a StackPanel with 2 children, your grid and your panel. Set the initial height of your panel to 0. Once the button is clicked, set the height to whatever you need it to be (e.g., MyPanel.Height = 20). You might want to wrap the grid in a ScrollViewer in case that is needed.
<StackPanel Orientation="Vertical">
<ScrollViewer Height="Auto" VerticalAlignment="Stretch">
<Grid Height="*" VerticalAlignment="Stretch" />
</ScrollViewer>
<ContentControl x:Name="MyPanel" Height="0" />
</StackPanel>
You might need to experiment with VerticalAlignment and Height="Auto" or Height="0" to get the layout you want.
You can use Expander. Please look at the following code snippet.
<DockPanel>
<Expander DockPanel.Dock="Bottom">
<StackPanel>
<TextBlock Height="25"></TextBlock>
<TextBlock Height="25"></TextBlock>
<TextBlock Height="25"></TextBlock>
</StackPanel>
</Expander>
<Border BorderBrush="LightGreen" BorderThickness="2">
<DataGrid/>
</Border>
</DockPanel >
I'd like to display the same instance of user control twice. Ive tried doing the following:
<UserControl.Resources>
<Views:MyControl View x:Key="_uc1" MinHeight="300"/>
</UserControl.Resources>
And trying to use it in a TabControl:
<TabControl Grid.Row="3" Grid.Column="1" Grid.ColumnSpan="3" >
<TabItem >
<TabItem.Header>
<TextBlock Text="Header1" FontWeight="13"/>
</TabItem.Header>
<StackPanel >
<ContentControl Content="{StaticResource _uc1}"/>
</StackPanel>
</TabItem>
<TabItem >
<TabItem.Header>
<TextBlock Text="Header2" FontWeight="13"/>
</TabItem.Header>
<StackPanel MinHeight="600" >
<ContentControl Content="{StaticResource _uc1}"/>
</StackPanel>
</TabItem>
</TabControl>
Im getting the error message:
"{"Specified element is already the logical child of another element. Disconnect it first."}"
Is what Im trying to achieve possible?
Thanks,
It's not. As the error indicates, a given object may only be present in a given logical tree once. This helps to ensure that the logical tree remains a tree.
If you're using the MVVM pattern (or are just using DataBinding in general,) then you can bind two different UserControls to the same backing ViewModel/data, so that the controls will behave the same and operate on the same state representation. You'll still need two different controls, though.
In WPF (and Silverlight) a control cannot be in more than one place in the visual tree. What you can do is have two separate instances of the user control, but bind their relevant properties to the same underlying source.
For example, let's say you had a Contact object and you wanted two MyControl instances to refer to the same FullName property.
<UserControl>
<UserControl.Resources>
<my:Contact x:Key="data" FullName="Josh Einstein" />
</UserControl.Resources>
<TabControl DataContext="{StaticResource data}">
<TabItem>
<TabItem.Header>
<TextBlock Text="Header1" FontWeight="13" />
</TabItem.Header>
<StackPanel>
<!-- instance #1 -->
<Views:MyControl FullName="{Binding FullName, Mode=TwoWay}" />
</StackPanel>
</TabItem>
<TabItem>
<TabItem.Header>
<TextBlock Text="Header2" FontWeight="13" />
</TabItem.Header>
<StackPanel>
<!-- instance #2 -->
<Views:MyControl FullName="{Binding FullName, Mode=TwoWay}" />
</StackPanel>
</TabItem>
</TabControl>
</UserControl>
If you just want a single control to appear in multiple places in the visual tree, but not actually be interactive, you can use a VisualBrush to "paint" onto another control.
You can not have the same control in two places, but you make it jump, see this answer of mine for an example of how to do that.