I have a grid inside a grid, that has a label inside. When I leave the label's padding as it is, everything's fine. But when I set the padding to 0, this happens:
(There's not supposed to be a white border there)
Here's my XAML code:
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="0.2*"></ColumnDefinition>
<ColumnDefinition Width="0.8*"></ColumnDefinition>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="0.02*"></RowDefinition>
<RowDefinition Height="0.98*"></RowDefinition>
</Grid.RowDefinitions>
<Grid VerticalAlignment="Center" Margin="0px" x:Name="TitleBar" Background="#121212" Grid.ColumnSpan="2" Grid.Row="0">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="0.2*"></ColumnDefinition>
<ColumnDefinition Width="0.6*"></ColumnDefinition>
<ColumnDefinition Width="0.2*"></ColumnsDefinition>
</Grid.ColumnDefinitions>
<Label Padding="5px 0px 0px 0px" Grid.Column="0" Grid.Row="0" Foreground="White">WorkChatApp</Label>
</Grid>
<ScrollViewer x:Name="Channels" Background="#232323" Grid.Column="0" Grid.Row="1" VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto"></ScrollViewer>
<ScrollViewer x:Name="Messages" Grid.Column="1" Grid.Row="1" VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto"></ScrollViewer>
</Grid>
That is not a border, but the background of the window. You define the Grid that contains your TitleBar Grid with rows that have star-sized heights: 0.02* and "0.98*". That means, the first row will always be scaled to occupy 2% of the available height and the second row will occupy 98% of the available height.
However, you have set the VerticalAlignment of the TitleBar Grid to Center, so it will be scaled only to the size that is necessary to display its content and then centered. That also means, if there is more space than necessary, the TitleBar is centered and above and beyond it there will be empty space and that is what you see and perceive as a border. If you scale your application window up, you can observe the same effect. Consequently, this is not related to the Padding of the Label.
Setting star-sized heights in this manner can lead to bad layout or even unusable controls when resizing the parent container. For example, if you scale your window down, the TitleBar will not be readable at some point.
Instead of this, you could make the first row Auto-sized and the second star-sized (* is the default).
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="0.2*" />
<ColumnDefinition Width="0.8*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<!-- ...other grid content. -->
</Grid>
If you define the columns like this, the first row will always shrink to the minimum size that is necessary to display its content and the second row takes up the remaining space.
Related
I am trying to get something like an image with adjustable margins done. The image itself is actually a path and resides in a StackPanel, stretching vertically. The StackPanel's width can be adjusted, and I want to keep the image's ratio and the ratio of path size to margin.
<StackPanel>
<Grid HorizontalAlignment="Stretch">
<Grid.RowDefinitions>
<RowDefinition Height="0.25*"/>
<RowDefinition Height="0.5*"/>
<RowDefinition Height="0.25*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="0.25*"/>
<ColumnDefinition Width="0.5*"/>
<ColumnDefinition Width="0.25*"/>
</Grid.ColumnDefintions>
<Path Grid.Row="1"
Grid.Column="1"
Data="...blabla..."
Fill="#FF0072C6"
Stretch="UniformToFill"/>
</Grid>
</StackPanel>
Now, the problem is, even though the path object gets drawn in the grid, the first and third rows are always of zero height, instead of getting set based on the height of the 2nd row. I know this happens because the Grid resides in a StackPanel, which ignores automatic height settings and doesn't even let the Grid stretch vertically (or horizontally depending on orientation). It does work if I set a fixed height to the grid but that would ruin the aspect ratio of the image when resizing. How can I get this to work?
This is what I have:
This is what I want:
EDIT:
It seems there is confusion concerning my question. So to hopefully clarify, here's the desired result after resizing the StackPanel:
As you can see, the whole grid is supposed to resize like it was an actual image. The Grid should keep its aspect ratio. This is not about the Path inside the Grid.
If i have correctly understood the problem, a simple solution could be fixing sizes and using a viewbox:
<StackPanel>
<!--The other rows-->
<Viewbox>
<Grid Width="100" Height="100">
<Grid.RowDefinitions>
<RowDefinition Height="25"/>
<RowDefinition Height="50"/>
<RowDefinition Height="25"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="50"/>
<ColumnDefinition Width="25"/>
</Grid.ColumnDefinitions>
<Path Grid.Row="1" Grid.Column="1" Data="M8.5,13.5L11,16.5L14.5,12L19,18H5M21,19V5C21,3.89 20.1,3 19,3H5A2,2 0 0,0 3,5V19A2,2 0 0,0 5,21H19A2,2 0 0,0 21,19Z" Fill="Blue" Stretch="Uniform" />
</Grid>
</Viewbox>
</StackPanel>
The code below and screenshots show the issue I'm having below.
I need to have a listbox with Width set to Auto as the content size is variable. However, the number of items going into the listbox will also change, so sometimes a ScrollBar will be needed. The problem is, Auto Width doesn't seem to play well with a Scrollbar as per the images below. I could add a margin but I do not want a gap when no scroll bar is required.
I notice that this is only a problem when the textbox has a long string placed in it, if there is a short/no string entered, then the scrollBar presents correctly.
Is there a way to do this other than detecting if a ScrollBar is needed and dynamically adding a margin? I feel like there should be a way to achieve this in my XAML while still keeping the listbox column to be Width=Auto.
private void MainWindow_OnLoaded(object sender, RoutedEventArgs e)
{
for (int i = 0; i < 200; i++)
{
lbxDocs.Items.Add("TESTSTRING"+i);
}
txtImagePath.Text =
#"uPPvU18ijL9Tz6fqvwLsymkdxuS8h8jS9afzQ8i7LLXvrb2JO2hmPImVF5Dq5PZpdOkw2sTX9j6GeGL7IsaDuaf1ltY0MdzCRHGTZlUVkMa43meW3gavXAWMHyLPiyfGlHxuXcQOoH8ldxkYuxhVRcSJY3ZyCzlCsPjWuINTQyJCAU5hiDqroXWI8"+
"uPPvU18ijL9Tz6fqvwLsymkdxuS8h8jS9afzQ8i7LLXvrb2JO2hmPImVF5Dq5PZpdOkw2sTX9j6GeGL7IsaDuaf1ltY0MdzCRHGTZlUVkMa43meW3gavXAWMHyLPiyfGlHxuXcQOoH8ldxkYuxhVRcSJY3ZyCzlCsPjWuINTQyJCAU5hiDqroXWI8";
}
<Window x:Class="Grid_ScrollBar.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"
xmlns:local="clr-namespace:Grid_ScrollBar"
mc:Ignorable="d" Loaded="MainWindow_OnLoaded"
TextOptions.TextRenderingMode="ClearType" WindowStartupLocation="CenterScreen"
TextOptions.TextFormattingMode="Display" Height="400" Width="500">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<TextBox Name="txtImagePath"/>
<ListBox Name="lbxDocs" Grid.Column="1" Grid.Row="1"/>
</Grid>
</Window>
Scroll Bar is cut off;
Once we hit the longer string item in the ListBox the width increases to show the rest of the scrollbar;
The problem is that you are telling to your textbox to take all the available space, i.e. all the space left by your ListBox. Now since the firsts elements of your listbox take "less" space, WPF grant them the minimum space possible, and it doesn't take in count the scrollbar size.
When you have this kind of problem (size of content that can very) my best advice is to not set width to auto. Instead go with proportional sizing (this will avoid also the the effect of physically shift columns to make more room for your listbox items).
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="9*"/>
<ColumnDefinition Width="1*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<TextBox Name="txtImagePath" Grid.Column="0" Grid.Row="0" TextWrapping="Wrap" Margin="0,0,10,0"/>
<ListBox Name="lbxDocs" Grid.Column="1" Grid.Row="1" />
</Grid>
you can add also TextWrapping="Wrap" to show the full text.
However if you really want to keep the width to auto you can force wpf to take in count the scrollbar using
<ScrollViewer Grid.Column="1" Grid.Row="1">
<ListBox Name="lbxDocs"/>
</ScrollViewer>
EDIT: to fix the problem with the scrollviewer you need to set the height of the listbox to the heigh of the scrollviewer, or the Auto setting will not work:
<ScrollViewer x:Name="test" Grid.Column="1" Grid.Row="1" VerticalScrollBarVisibility="Auto">
<ListBox Name="lbxDocs" Height="{Binding ElementName=test, Path=ActualHeight}"/>
</ScrollViewer>
try adding the scrollview to your listview without changing the rest of xaml
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<TextBox Name="txtImagePath"/>
<ListBox Name="lbxDocs"
Grid.Column="1"
Grid.Row="1"
ScrollViewer.CanContentScroll="True"
ScrollViewer.VerticalScrollBarVisibility="Auto"
ScrollViewer.HorizontalScrollBarVisibility="Auto"
/>
Width = "*" means you will use all the rest of the available space.
Width = "Auto" means you will adjust the size of your content so that everything fits and not over any excess space
so (as you did) in your window will be column 1 adjusted to the size of the listview and column 0 with the rest of the window.
I have the following Grid with a TextBox in it:
<UserControl ...>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="30px"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="1px"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<TextBox Grid.Column="1" Grid.RowSpan="3" AcceptsReturn="True"
TextWrapping="Wrap" HorizontalScrollBarVisibility="Hidden"
VerticalScrollBarVisibility="Visible" HorizontalAlignment="Stretch"
VerticalAlignment="Stretch"/>
<!-- content in other cells of the Grid's first column -->
</Grid>
</UserControl>
I want the TextBox to fill all space that is available on the control (width and height-wise) and should the user enter more text than fits into it I want its vertical scrollbar to become active, without resizing the TextBox. What happens instead is that the size of the TextBox changes to accomodate the content and the whole grid grows with it.
How do I achieve what I need?
Edit: Here's an illustration of what happens.
The above screenshot is of the situation when the content fits comfortably into the TextBox. The below screenshot is of the situation when there is not enough room to fit all content - the TextBox is then resized to fit it and this resizes also the grid that it is placed in, making it look broken.
Edit 2: The project that demonstrates this behavior is here.
I have managed to solve this by adding an invisible Border in the same cells of the Grid as the TextBox, then setting TextBox' Width and Height to ActualWidth and ActualHeight of that Border respectively:
<Border x:Name="b" Grid.Column="1" Grid.RowSpan="3"
HorizontalAlignment="Stretch"/>
<TextBox AcceptsReturn="True" TextWrapping="Wrap" Grid.Column="1"
Grid.RowSpan="3" Width="{Binding ActualWidth, ElementName=b}"
Height="{Binding ActualHeight, ElementName=b}"
HorizontalScrollBarVisibility="Hidden"
VerticalScrollBarVisibility="Visible" HorizontalAlignment="Stretch"
VerticalAlignment="Stretch"/>
This then caused the TextBox to stay of fixed Height regardless of its content, but there was another problem with its Width: it grew when the interface was expanded, but didn't shrink afterwards, because of the underlying ScrollViewer. The trick was to set that ScrollViewer's HorizontalScrollBarVisibility to Disabled, instead of Hidden as I had done previously.
I pushed changes of the example project to GitHub, so the solution is now available here.
The TextBox doesn't fill the Grid. You can confirm this yourself by specifying a Background for the Grid:
<UserControl>
<Grid Background="Yellow">
...
This is because the height of the Grid is 30 px + whatever the height of the TextBox is + 1 px. For the contents of the row 2 or 3 to fill the Grid, you need to change the Height of at least one of the RowDefinitions to *:
<UserControl>
<Grid Background="Yellow">
<Grid.RowDefinitions>
<RowDefinition Height="30px"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
<RowDefinition Height="1px"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<TextBox Grid.Column="1" Grid.RowSpan="3" AcceptsReturn="True"
TextWrapping="Wrap" HorizontalScrollBarVisibility="Hidden"
VerticalScrollBarVisibility="Visible" HorizontalAlignment="Stretch"
VerticalAlignment="Stretch"/>
</Grid>
</UserControl>
I want to have main window split in three parts like the one on the picture. there's supposed to be a line (red one) or left border of the rectangle number 2, that, when it's dragged with mouse, it resizes both rectangle 1 and 2. it's like the behaviour of playlist in windows media player. any ideas on how to obtain this? Also, it would be great if someone proposes a solution to how this playlist make collapsed if the red line is dragged to the right.
Define a <Grid> with columns and rows like so:
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="300"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="600"/>
<ColumnDefinition Width="20"/>
<ColumnDefinition Width="300"/>
</Grid.ColumnDefinitions>
...
and then the gridsplitter (still inside the grid):
<GridSplitter Grid.Row="0" Grid.Column="1" ResizeDirection="Columns" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"/>
Note that the gridsplitter will need it's own column.
It is a GridSplitter, here is how to use one:
<GridSplitter Grid.Row="1"
Height="5"
Width="Auto"
HorizontalAlignment="Stretch"
VerticalAlignment="Stretch"
Background="Gray"
ResizeDirection="Rows" />
You need to assign a Row or Column to it from your Grid, and specify its ResizeDirection. This one is horizontal, but you get the idea for a vertical one.
HTH,
Bab.
I am using a Silverlight 3.0 Image control, setting it's Stretch property="Uniform". Unless I am mistaken, the expected behavior for Stretch="Uniform" is that it should scale the image, maintaining aspect ratio, letterboxing as needed. This works fine for images with landscape orientations, in that they scale up to fill the space, maintaining aspect ratio without cutting off any of the image. It is a complete fail for images with a more vertical or 'portrait' orientation. Instead of scaling up to fit within the image control, they actually scale past the height constraint such that you only see the middle of the image, with top and bottom cut off. Its as if the control only uses width when scaling, and forgets to check height?
Is this a bug in the Image control, or am I missing or mis-setting a property? To reproduce, find / create an image with a 'portrait' aspect ratio (taller than it is wide) and create an Image with Stretch="Uniform".
**** UPDATE WITH REQUESTED XAML ******
Note that the reason that the size is not explicit is to allow for full screen and scaling.
<Grid x:Name="LayoutRoot">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="9"/>
<ColumnDefinition Width="30"/>
<ColumnDefinition Width="30"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="30"/>
<ColumnDefinition Width="50"/>
<ColumnDefinition Width="30"/>
<ColumnDefinition Width="9"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="30" />
</Grid.RowDefinitions>
<Border BorderBrush="Black" Grid.Row="0" Grid.ColumnSpan="8" BorderThickness="1, 1, 1, 0">
<Border BorderBrush="{StaticResource blackStatusMapLGB}" BorderThickness="9,9,9, 0">
<Border BorderBrush="Gray" BorderThickness="1, 1, 1, 0">
<StackPanel VerticalAlignment="Center" HorizontalAlignment="Center">
<MediaElement Height="Auto" Width="Auto" Visibility="Collapsed" AutoPlay="true" Stretch="Fill" MediaFailed="SilverlightMediaPlayer_MediaFailed" Name="previewMediaElement"/>
<Image Name="imagePreview" Stretch="Uniform"/>
</StackPanel>
</Border>
</Border>
</Border>
So, the way a vertical StackPanel works is that measures its children with an infinite Size in the vertical axis, effectively saying to the child: "you can be as tall as you like". It does not constrain the size of the child vertically (though it does constrain it in the horizontal direction).
The way the Stretch=Uniform property works on an Image with no explicit size set is it says: "be as large as you can be within the size constraints while maintaining your aspect ratio".
Now when you combine these two, you have an Image that is constrained only in the Horizontal axis; it takes all of the space available horizontally and sizes vertically to maintain the aspect ratio.
Does this explanation help you understand why you are seeing the behavior that you are seeing?
Imagine you have an image with a 2:1 aspect ratio (twice as tall as it is wide). It has Stretch=Uniform and no explicit Width/Height set. You put it in a StackPanel of size 100x100. The Image will get a size constraint of 100xInfinity. It will first size in the horizontal axis and take all of the space available to it; 100 pixels. It will then see that is has a 2:1 aspect ratio and so will size vertically to 200 pixels. So you end up with an Image of size 100x200 in a StackPanel of 100x100. So the StackPanel is forced to clip its child to the available space.
Most likely this is caused by your image's width being set (by its parent container) instead of its height. It is stretching uniformly, but its height is unconstrained, and it is being clipped.
If this does not help, please provide the XAML for its container.
I just tried this with a tall image and it worked fine. I suspect that the problem is with the Image element's container - it's actually showing the entire image, but the top and bottom are being clipped off.
Here's what I used to test:
<UserControl
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Class="Temp_Delete.MainPage"
Width="640" Height="480">
<Grid x:Name="LayoutRoot" Background="White">
<Image Source="Tall.png" Stretch="Uniform"></Image>
</Grid>
</UserControl>
UPDATE: All your nested borders are throwing it off since they don't have a defined height. I'd use an ImageBrush on the top level border:
<UserControl
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Class="Temp_Delete.MainPage"
Width="640" Height="480">
<Grid x:Name="LayoutRoot">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="9"/>
<ColumnDefinition Width="30"/>
<ColumnDefinition Width="30"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="30"/>
<ColumnDefinition Width="50"/>
<ColumnDefinition Width="30"/>
<ColumnDefinition Width="9"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="30" />
</Grid.RowDefinitions>
<Border BorderBrush="Black" Grid.Row="0" Grid.ColumnSpan="8" BorderThickness="1, 1, 1, 0">
<Border.Background>
<ImageBrush Stretch="Uniform"/>
</Border.Background>
<Border BorderBrush="Black" BorderThickness="9,9,9, 0">
<Border BorderBrush="Gray" BorderThickness="1, 1, 1, 0">
<StackPanel VerticalAlignment="Center" HorizontalAlignment="Center">
<MediaElement Height="Auto" Width="Auto" Visibility="Collapsed" AutoPlay="true" Stretch="Fill" MediaFailed="SilverlightMediaPlayer_MediaFailed" Name="previewMediaElement"/>
</StackPanel>
</Border>
</Border>
</Border>
</Grid>
</UserControl>
May take a little tweaking to get all the borders to display correctly, but you can set the padding / margin on the container elements if that's important to you.
Can you verify if your image works in that XAML? Can you post more of your XAML so we can see the context?