In my WPF application I am trying to connect all the sizes to the app size. So the main grid stretches to the main window, the canvas - to the main grid etc. But this does not work. For example, ScrollViewer that is inside of the canvas, stretches to the main grid.
What is a solution?
Simple code for example:
<Window Height="400" Width="200" ...>
<Grid HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Canvas Grid.Row="0" Grid.Column="0" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
<ScrollViewer HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
</ScrollViewer>
</Canvas>
</Grid>
</Window>
Just remove the canvas and it will work.
Basically, canvas has infinite size by default, so everything in canvas cannot be aligned, unless you specify size maually.
<Window Height="400" Width="200" ...>
<Grid>
<ScrollViewer>
</ScrollViewer>
</Grid>
</Window>
Note, that you dont have to specify Grid's Column and Row Definitions, if there's only single cell. it works by default. Also, Horizontal and Vertical Alignment hav value "Stretch" by default, so it does not have to be specified explicitelly as well.
Since there is nothing but scrollviewer inside the grid, you could remove the grid as well:
<Window Height="400" Width="200" ...>
<ScrollViewer>
</ScrollViewer>
</Window>
Related
Let's say there's a WPF window which has a StackPanel within which there is a control (WebBrowser, in my case). I want its height to increase when I increase the window's height. I am able to produce the effect in terms of width but no so in height.
xaml (which did not work):
<Window Height="700">
<StackPanel Height="Auto">
<WebBrowser x:Name="browser" Height="Auto" MinHeight="410" />
</StackPanel>
</Window>
Why don't you use Grid then instead of StackPanel (OR you can also have StackPanel within the Grid if really required), see the code snippet below:
XAML:
<Window Height="700">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition />
</Grid.ColumnDefinitions>
<WebBrowser x:Name="browser" Height="Auto" MinHeight="410" />
</Grid>
</Window>
I'm having trouble getting my UserControl to expand vertically when my window is expanded.
My UserControl currently sits inside a ItemsControl which is stretching correctly by setting the VerticalAlignment="Stretch" property on the ItemsControl.
I add the following UserControl to the ItemsControl:
<UserControl MinWidth="930">
<Grid VerticalAlignment="Stretch" Background="Red">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="200" />
<ColumnDefinition Width="730*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="400" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<DockPanel Grid.Column="1" Grid.ColumnSpan="1" Grid.RowSpan="2" Grid.Row="0" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Background="Pink" LastChildFill="True">
<ItemsControl Name="itemPanelOverview" Grid.Column="1" Background="Black" Margin="0"/>
</DockPanel>
</Grid>
</UserControl>
The UserControl is called in an ItemsControl inside of a TabControl like so:
<TabItem>
<TabItem.Header>
HEADER EG
</TabItem.Header>
<ItemsControl Name="contentItems" Grid.ColumnSpan="2" Grid.Column="1" Grid.Row="1" VerticalAlignment="Stretch" Background="Blue">
<Grid Height="35" Background="{DynamicResource GrayMenuGradient}" >
<Image Source="..." Stretch="None" />
<TextBlock Text="{Binding WelcomeMessage}" />
</Grid>
</ItemsControl>
</TabItem>
It appears that the ItemsControl (contentItems) is stretching as expected, as I can see the blue background stretching correctly.
I haven't set the height for this UserControl anywhere other than the Row Definitions. Is there something I'm missing?
There are at least two aspects at play here:
The first is that when you have items in an ItemsControl, each item is actually inside an ItemContainer, so it is the container that you want to stretch.
You can design the container by declaring an ItemContainerTemplate for your ItemsControl: http://msdn.microsoft.com/en-us/library/system.windows.controls.itemcontainertemplate.aspx
The second consideration is the ItemsPanelTemplate, which determines into what type of panel the items are placed. The ability of the items in the ItemsControl to fill up the available space is going to depend on the type of container as much as on the type of ItemContainer. For example, if you use a StackPanel for the ItemsPanelTemplate, it won't fill up available space because StackPanel grows and shrinks according to its contents. A DockPanel could potentially work, but only the last child would grow to fill available space. Perhaps a UniformGrid could do the trick.
I have the XAML shown below (for example). If you drag the grid splitter as far as it goes to the left, and keep dragging the mouse, the right-hand column will grow in size outside the bounds of the window - obviously not what I want.
The problem is that I can't set a hard MaxWidth on the right-hand column because the user can resize the window, thus increasing the available space for that column.
So far I think I need to bind the MaxWidth of the right-hand column to something like the window's client area minus the MinWidth of the left plus the width of the splitter column. But I'd like to avoid that if possible. Thoughts?
<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Width="450"
Height="300">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" MinWidth="100" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="200" MinWidth="200" />
</Grid.ColumnDefinitions>
<Grid Grid.Column="0">
<Button>Monkey</Button>
</Grid>
<GridSplitter Grid.Column="1" Width="7" ResizeBehavior="PreviousAndNext" />
<Grid Grid.Column="2" Margin="4">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<GroupBox Grid.Row="0" Header="Spaghetti" Margin="0, 0, 0, 5">
<ComboBox HorizontalAlignment="Stretch" VerticalAlignment="Stretch">Noodles</ComboBox>
</GroupBox>
<Expander Grid.Row="1" Header="Batman" IsExpanded="True" Margin="0, 0, 0, 5">
<Button HorizontalAlignment="Stretch" VerticalAlignment="Stretch">Batman!</Button>
</Expander>
</Grid>
</Grid>
</Window>
I'm having the same problem. Maybe this will be a partial answer. I bound the MaxWidth of the column I'm expanding to the ActualWidth of its grid. The goal being that the splitter never exceed the size of its grid. The binding works correctly but it's not achieving the goal because once my grid splitter gets to the edge of the grid, the grid starts resizing larger as I drag the splitter. If we can make the grid not resize with the splitter, this should work.
I have a Silverlight application that will run out of the browser. I want the layout to resize based on the size of the window. The layout is composed of a Grid. This Grid has a Canvas which hosts a Border, and other controls. The Canvas correctly resizes as the window resizes. However, the Border control seems to be a fixed size. How do I make the Border control stretch to the width of the Canvas and resize if the Window resizes? My code looks like the following:
<Grid x:Name="LayoutRoot">
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<Canvas x:Name="myCanvas" Background="Lime">
<Border Canvas.Top="77" Border="Black" BorderThickness="2">
<TextBlock x:Name="myTextBlock" />
</Border>
</Canvas>
</Grid>
Thank you for your help!
Assuming you are wanting the Canvas to be bound to the first Grid.Column, then you can add RowDefinitions and then move the Border to outside the Canvas, then the following code should work.
(Only tested in WPF)
<Grid x:Name="LayoutRoot">
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="77"/>
<RowDefinition/>
</Grid.RowDefinitions>
<Canvas x:Name="myCanvas" Background="Lime" Grid.RowSpan="2">
</Canvas>
<Border Grid.Row="1" Border="Black" BorderThickness="2" VerticalAlignment="Top">
<TextBlock x:Name="myTextBlock" Text="Happy TEXT" />
</Border>
</Grid>
New stuff: <Grid.RowDefinitions>, Grid.RowSpan="2" to Canvas and Grid.Row="1" plus VerticalAlignment="Top" to Border.
Text added for testing.
I have a window where I add a new UserControl to (with an image), I simply want to center the control in the middle of the screen (both vertically and horizontally). I can only get the vertical one to work. I'm gonna swap content in the DockPanel from my CodeBehind and want to show this startup screen before I start doing my slideshow UI, this means that the content is set from the CodeBehind.
My Window:
<Window x:Class="GreenWebPlayerWPF.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Window1" Height="512" Width="853" WindowStyle="None" WindowState="Maximized" WindowStartupLocation="CenterScreen">
<DockPanel Width="Auto" Height="Auto" Name="TransitionContainer" Background="Black" Margin="0" LastChildFill="True"></DockPanel>
</Window>
My UserControl:
<UserControl x:Class="GreenWebPlayerWPF.FrontPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<DockPanel Background="Black">
<Image Name="image1" Stretch="None" Source="/GreenWebPlayerWPF;component/gw.png" />
</DockPanel>
</UserControl>
Please note that I'm using maximized/full screen.
Use a Grid:
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<!-- Replace with your UserControl -->
<Button Content="Foo" Grid.Column="1" Grid.Row="1"/>
</Grid>
You can dock it inside your DockPanel (if you must have a DockPanel there) to stretch. And, of course, while the above is all markup, you can just as easily create such a grid from code.
I keep running into this problem when trying to center elements on the page.
The problem with the StackPanel is that HorizontalAlignment has no effect when the Orientation is Horizontal and VerticalAlignment no effect when Orientation is Vertical. So you keep banging your head trying to set values with no effect. It is not illogical that it works this way but it would be good if this was reported as an error.
The solution I found is to have two imbricated StackPanels one centered horizontally and the other vertically as shown below. Finding the size of the parent is needed to size the intermediate panel otherwise it would be flat and its content hidden - an absolute value would work as well. Although not a panacea itis a bit less verbose than using a grid.
<StackPanel Background="Bisque" Orientation="Vertical" Width="300" Height="300" >
<StackPanel HorizontalAlignment="Center" Orientation="Horizontal"
Height="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType=StackPanel}, Path=ActualHeight}">
<StackPanel VerticalAlignment="Center" Width="200" Height="60" Background="Blue">
</StackPanel>
</StackPanel>
</StackPanel>
It's quite an old one, but centring a control is now as simple as:
<Grid VerticalAlignment="Stretch" HorizontalAlignment="Stretch">
<StackPanel VerticalAlignment="Center" HorizontalAlignment="Center" Height="350" Width="600">
<TextBox />
</StackPanel>
</Grid>