I have a listbox with the ItemsPanelTemplate set to UniformGrid with rows= 6 and cols= 7.
I want the listbox items to fill their space.
I am using a datatemplete defined in a dictionary.
The outer control of my template is a Border with HorizontalAlignment=Stretch
and VerticalAlignent=Strectch but the templates do not fill the listbox items space?
Any ideas?
Malcolm
The answer to this to set HorizontalContentAligment and VerticalContentAlignment to Stretch on the LISTBOX not the datatemplate.
EDITED: Added additional information, and replied to question.
An interesting way to make ListBoxItems be uniform with other items is to the Grids shared scope feature in your DataTemplate
Example:
<ItemsControl Grid.IsSharedSizeScope="True" ItemsSource="{Binding Path=Items}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition SharedSizeGroup="Content"/>
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="1" Text="{Binding Path=Name}">
</Grid>
</StackPanel>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
Now all the TextBlocks will be the same size in your layout. The child item should fill all available space if no specific width/height are set.
Alternatively you can set the Width and Height of the control to stretched, however I think using the Grid.SharedScopeSize is a more elegant way to achieving the same effect.
Related
I'm trying to make tree view item stretch horizontally
Here is my original outcome
But what I want is this
here is my XAML code
<Grid x:Name="AgendaGrid" Grid.Row="1">
<Controls:TreeView ItemsSource="{Binding TreeItems}" Style="{StaticResource TouchTreeViewStyle}">
<Controls:TreeView.ItemTemplate>
<DataTemplate>
<data:DataTemplateExtensions.Hierarchy>
<data:HierarchicalDataTemplate ItemsSource="{Binding Children}" />
</data:DataTemplateExtensions.Hierarchy>
<Grid>
<Button Visibility="{Binding IsHeading}" Padding="0" Content="{Binding Name}" />
</Grid>
</DataTemplate>
</Controls:TreeView.ItemTemplate>
</Controls:TreeView>
</Grid>
The simple way to achieve what you want would be to use the HorizontalContentAlignment property:
<TreeView ItemsSource="{Binding Items}" HorizontalContentAlignment="Stretch" />
Unfortunately, that won't work with a TreeViewItem. That is because the ControlTemplate of the TreeViewItem features a hard coded top level Grid that has the wrong RowDefinitions set up for this requirement. Therefore, the way to fulfil your requirement is to alter the default ControlTemplate, which you can find in the TreeView Styles and Templates page on MSDN.
Rather than repeat the whole story again here, I'd rather direct you to a solution on the Horizontal stretch on TreeViewItems page of LeeCampbell's Blog. That describes the problem in a little more detail and suggests the solution of a simple tweak to the ControlTemplate.
I have an ItemsControl, nothing fancy:-
<ItemsControl ItemsSource="{Binding ...}"
ItemTemplate="{StaticResource ...}" />
The ItemTemplate contains the following XAML:-
<Border BorderThickness="0,0,0,1"
BorderBrush="LightGray"
Padding="0,2,0,2">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"
SharedSizeGroup="Prompt" />
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0"
Text="{Binding ...}" />
<NumericUpDown Grid.Column="1"
Width="75"
Text="{Binding ...}" />
</Grid>
</Border>
This produces a UI looking like this:-
However if the text in the TextBlock is very long, it pushes the NumericUpDown off the r.h. edge of the ItemsControl, e.g.:-
I was hoping that once the NumericUpDown had been "pushed up" against the r.h. edge of the ItemsControl, the TextBlock would then start getting truncated. I assume the current behaviour is due to the ItemsControl using a StackPanel as its items presenter. How can I get it to do what I want?
When you are using SharedSizeGroup with Grid.IsSharedSizeScope="True" the column's Star sizing is treated as Auto, more not official informations here.
The IsSharedSizeScope should not be used for arranging the controls described in the question. You should remove all SharedSizeGroup attributes and set the ItemsControl's HorizontalAlignment to Left.
I think that you might want to try setting the Control.HorizontalContentAlignment Property to Stretch on your ItemsControl. According to the linked page, this:
Gets or sets the horizontal alignment of the control's content.
In plain English, this means that it should set the Width of the rendered children, or items, to the same Width as the ItemsControl.
After a lot of running into dead-ends thinking I could resolve this by changing the ItemsPresenter or ItemsPanel, I ended up using a DockPanel within my ItemTemplate, instead of the grid:-
<Border BorderThickness="0,0,0,1"
BorderBrush="LightGray"
Padding="0,2,0,2">
<DockPanel LastChildFill="true">
<NumericUpDown DockPanel.Dock="Right"
Width="75"
Text="{Binding ...}" />
<TextBlock Text="{Binding ...}" />
</DockPanel>
</Border>
I'm not entirely sure why the DockPanel respects the size of the parent ItemsControl, while the Grid was happy to horizontally "overrun" off the edge. This is an aspect of WPF that I still struggle with - which controls' sizes are affected by their parent, and which are affected by their children's sizes!
I want to make it so that my TabControl is vertically scrollable, but I can't seem to do it. The following sample acts as though there was no scrollviewer at all. I even tried putting the TabControl inside the scrollviewer, or putting it all in a grid and constraining the height of the grid, but nothing works.
<DataTemplate x:Key="tabControlTemplate">
<TabControl ItemsSource="{Binding guiItems}" DisplayMemberPath="Title" Height="Auto" Template="{StaticResource mainTabControlTemplateEx}">
<TabControl.ContentTemplate>
<DataTemplate>
<ScrollViewer Grid.Row="1" VerticalScrollBarVisibility="Auto" CanContentScroll="True">
<StackPanel Margin="2" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
<ItemsControl ItemsSource="{Binding guiItems }" ItemTemplateSelector="{DynamicResource templateSelector}"/>
</StackPanel>
</ScrollViewer>
</DataTemplate>
</TabControl.ContentTemplate>
</TabControl>
</DataTemplate>
The actual problem is not clear from the question.
You are not getting to see scrollviewer and the content inside is clipped? PLease confirm if that is the case.
If the problem is you are getting to see entire content taking up all the available space, and you would like to control that using scroll viewer, then you would need to set 'MaxHeight' property on Scroll Viewer. This would limit the height of your DataTemplate and would make verticall scroll bar visible if the inner content goes beyond the MaxHeight.
Hope that helps.
I have the following xaml which resides in a wpf user control -
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="30" />
<RowDefinition Height="*" />
<RowDefinition Height="30" />
</Grid.RowDefinitions>
<TextBox
x:Name="MyTxt"
TextWrapping="WrapWithOverflow"
Grid.Row="0"
/>
<ListView
x:Name="MyList"
ItemsSource="{Binding}"
Grid.Row="1"
/>
<Label
Grid.Row="2"
/>
</Grid>
This control is nested within a grid in a view. I would like to have the text box be a set height at the top of the grid, the label at the bottom showing as a fixed height at the bottom of the grid. I want the list view to fill the rest of the screen area.
The problem that I am having is the listview does not size correctly. If I have too many records that show up in it, it extends beyond the window and no scroll bars are available to scroll down. I therefore cannot get to the bottom to see the vertical scroll bar if the data stretches off to the right of the screen.
I was able to set the listview to a fixed height and that worked, but I would like it to be more dynamic and resize with the window if possible.
Does anyone have any tips that might get the sizing correct?
Thanks for any thoughts.
EDIT - Here is the xaml for the containing grid in the mainwindow view. this was adapted from the article by Josh Smith here
<Grid>
<Border
Style="{StaticResource MainBorderStyle}"
>
<HeaderedContentControl
Content="{Binding Path=Workspaces}"
ContentTemplate="{StaticResource WorkspacesTemplate}"
/>
</Border>
</Grid>
I do have the scrollviewer properties set as mentioned in some of the answers below.
Here is the datatemplate for the workspace
<DataTemplate x:Key="WorkspacesTemplate">
<TabControl
IsSynchronizedWithCurrentItem="True"
ItemsSource="{Binding}"
ItemTemplate="{StaticResource ClosableTabItemTemplate}"
Margin="4"
/>
</DataTemplate>
Can you just add these properties to the listview?
ScrollViewer.CanContentScroll = "True"
ScrollViewer.VerticalScrollBarVisibility="Visible" <!-- or "Auto" -->
Everything else looks ok to me. You have the 3 rows, 2 of which are absolute, the other stretching. You also have the listview in the 2nd row, so it should stretch with it.
if that doesn't work, try wrapping the ListView in a scrollviewer
<ScrollViewer>
<ListView/>
</ScrollViewer>
What is the VerticalAlignment of a ListBox by default? You might need to set the vertical alignment to Stretch.
<ListView
x:Name="MyList"
ItemsSource="{Binding}"
Grid.Row="1"
VerticalAlignment="Stretch"
/>
I was able to get it working. If I change the containing grid in the main window to use a ContentControl instead of a HeaderedcontentControl, it works as expected.
Thank for any help.
I have a list box which is of a certain fixed width. The number of items in the listbox varies. Is there a way to center the contents of the list box? The "Content Presenter" of the ListBoxItem ,centers each item inside its Template instead of centering it with respect to the entire listbox width.
Sorry about not replying earlier. The issue was with the width of the ItemsPanelTemplate which I was using in my Listbox. Earlier Width was set to 925. Changing this Width to MaxWidth worked. The code:
<ItemsPanelTemplate x:Key="ItemsPanelKey">
<Contact:AnimatedWrapPanel HorizontalAlignment="Center" MaxWidth="925">
<Contact:AnimatedWrapPanel.Interpolation>
<interpolate:BackInterpolation Amplitude=".5" Suppression=".2" EdgeBehavior="5"/>
</Contact:AnimatedWrapPanel.Interpolation>
</Contact:AnimatedWrapPanel>
</ItemsPanelTemplate>
Not sure, but sounds like what you want is a custom item template that centers each item. If I'm right, the only tricky thing is that the template has to be the same fixed width as the listbox. So if your listbox contains some object Foo and Foo.Text is a simple text property to be displayed, you could do it like so in Xaml:
<ListBox x:Name="TheListBox" Width="300">
<ListBox.ItemTemplate>
<DataTemplate>
<Grid Width="300">
<TextBlock Text="{Binding Text}" HorizontalAlignment="Center" />
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
and the code behind contains something like:
List<Foo> ListOfFoo = new List<Foo>();
ListOfFoo.Add(new Foo(){Text="Something"});
ListOfFoo.Add(new Foo(){Text="Something Else"});
ListOfFoo.Add(new Foo(){Text="Something Completely Different"});
TheListBox.ItemsSource = ListOfFoo;
If it's more complex or you can't make it work, post some code and we'll go from there.