I have these simple wpf controls in this layout. My question where is the extra pixels coming from in the TextBox. It looks like the TextBox is not respecting the Width='Auto' property.
I'm looking to make the Grid Column 0 width equal exactly to the width of the TextBox.
image of rendered code
<Grid ShowGridLines="True">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<StackPanel>
<TextBox Text="This TextBox located in Row 0 Column 0"
Width="Auto"></TextBox>
</StackPanel>
<TextBox Grid.Row="1"
Text="This TextBox located in Row 1 Column 0 with Column Span of 2"
Grid.ColumnSpan="2"></TextBox>
</Grid>
WPF's layout rules can be confusing at times, can't they? :)
The issue here is that you've set the width to Auto for both columns. Grid is only going to reduce the column width if it needs to or has a good reason to. Since you used Auto for the second column also, and since that column doesn't need to be increased in size to fit the longer second-row text, you get the sizes you see.
If you really want that first column to be as small as possible, set the second column width to * instead of Auto. (Or just omit the Width attribute…* is the default.)
Related
I have the following XAML
<Window x:Class="WpfApp1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<TextBlock Grid.Row="0" Grid.Column="0" Text="Hello World" />
<TextBlock Grid.Row="1" Grid.Column="0" Text="Hello ABC DEF World" TextTrimming="CharacterEllipsis" />
</Grid>
</Window>
This results in the following User Interface:
I would like the TextBlock "Hello ABC DEF World" to trim and not extend the column width.
To have this result:
Edit:
Want to point out
I wouldn't need it to be a Grid it could be any content control (StackPanel, DockPanl, Canvas and so on)
I wouldn't need it to be a TextBlock it could be any control (Run, Label and so on)
If what I desire is possible with a different combination of controls, I am more than willing to give it a try.
What I want in non-code terms:
I want 2 lines of text, the first line of text is the "main" information, and the second line of text is the "minor" information.
The "main" information should stretch fully to show its full text.
The "minor" information should only stretch as far as the main goes and not more, if it is longer it should Trim
I know I could achieve this goal with the following XAML:
<TextBlock ...
x:Name="MainInfo" />
<TextBlock ...
MaxWidth="{Binding Mode=OneWay, Path=ActualWidth, ElementName=MainInfo}" />
But if possible I would like to avoid the Binding on ActualWidth.
I hoped that HorizontalAlignment = Left; would prevent the TextBlock's desire to stretch, but that wasn't the case.
But if possible I would like to not use the Binding on ActualWidth.
Well, you need to define the width contraint somehow. Auto effectively means that the column will grow along with the widest element in it, i.e. the "minor" information TextBlock in this case.
So you should set the Width of the column to the ActualWidth of MainInfo, for example using a binding. Or programmatically. Either way, you have to set it one way or another.
You could achieve this in multiple ways.
Depends on the exact desired purpose.
One notable and easy example would be to use some trickery
You could put the main textblock and a rectangle in a horizontally aligned stackpanel with a row span of 2 and with a higher Z index than the secondary textblock. You set the rectangle to have the height equal with the sum of the two textblocks and the width must be set by you after your desired specifications. The two textblocks must have set a fixed height, and the textblock that is inside the stackpanel with the rectangle must be aligned to the top vertically inside the stackpanel. The result, if implemented correctly, should be a rectangle that is covering the part of the secondary textblock that is making the secondary textblock bigger than the main textblock.
I have an Expander control, and the grid inside will have a ListBox with a Label on top of it saying 'Video Sources'. I am attempting to use Grid Row Definitions to achieve this. My issue however is that the grid rows separate everything evenly. I want the label to be directly on top of the ListBox. Removing the definitons causes the ListBox to fill up the entire grid including covering up the Label (which makes no sense to me as the label is on top).
My current code is below:
<Expander HorizontalAlignment="Left" Height="434" Header="Expander" ExpandDirection="Left" Margin="651,8,0,8">
<Grid Background="#FF252525" ShowGridLines="True">
<Grid.RowDefinitions>
<RowDefinition></RowDefinition>
<RowDefinition></RowDefinition>
<RowDefinition></RowDefinition>
</Grid.RowDefinitions>
<Label Content="Video Sources" Grid.Row="0"/>
<ListBox Grid.Row="1" d:ItemsSource="{d:SampleData}">
</ListBox>
</Grid>
</Expander>
The code produces this result. You can see there are even gaps between each control. I want the video sources label right above the listbox:
It would be nice if you could set the column name like in a ListView, however as far as I am aware that is not possible. I don't think it's worth using a ListView for something that will only have a single column, either
You have to set the rows height ; to auto (ie: minimal value) and * (ie: remaining space).
Also only two rows definition are needed.
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Label Grid.Row="0"
Content="Video Sources" />
<ListBox Grid.Row="1"
ItemsSource="{d:SampleData}"
VerticalAlignement="Top" />
</Grid>
I want to achieve the following in XAML (WPF):
By default, maintain a 60%-40% split for a grid with 2 horizontal elements
If the second element is blank (or smaller than 40%), allow the first element to take up the remaining space if it needs it
If the first element is blank (or smaller than 60%), allow the second element to take up the remaining space if it needs it
This feels like a "preferred width" instead of a "MaxWidth" type thing. Additionally, the first element is left aligned and the second element is right aligned.
Some things I've tried that don't work (also couldn't find if this question was answered - searches didn't result in what I wanted)
This doesn't work because it sets both to columns to a specified width:
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="6*"></ColumnDefinition>
<ColumnDefinition Width="4*"></ColumnDefinition>
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0"
Text="Test1"/>
<TextBlock Grid.Column="1"
Text="Test2" />
</Grid>
This doesn't work because although if both take up 100% of their spaces, it looks fine, but auto won't allow one element to overflow into the other area if a "MaxWidth" is set - I would like "MaxWidth" to almost be like a "PreferredWidth":
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"
MaxWidth="60% of the pixels"/>
<ColumnDefinition Width="Auto"
MaxWidth="40% of the pixels" />
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0"
Text="Test1"/>
<TextBlock Grid.Column="1"
TextAlignment="Right"
Text="Test2" />
</Grid>
Is there a way to achieve (what seems like a relatively easy product spec) through just XAML? And if not, what are the alternatives?
I'm trying to use HorizontalAlignment="Left" in the following situation:
<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
<Grid HorizontalAlignment="Left">
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition />
<ColumnDefinition />
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0" Background="Gray" Text="Small Text" TextWrapping="Wrap"/>
<TextBlock Grid.Column="1" Background="White" Text="This is a very large amount of text" TextWrapping="Wrap"/>
<TextBlock Grid.Column="2" Background="Gray" Text="Medium amount of text" TextWrapping="Wrap"/>
</Grid>
</Window>
My goal is to be able to resize the window, and have the three TextBlocks resize themselves proportionally. This works, but the grid is putting some blank space to the right of the final column, and as I try to resize towards the final column, the columns start to shrink. I want this shrinking behavior, but I don't want it to start until there is no more white space to the right of the rightmost column.
I can't use a UniformGrid as the text lengths can vary, and no other built-in WPF control that I've seen has the ability to resize all children when the parent size changes. I've looked into creating a custom panel, but that seems to be more trouble than it's worth. I feel like something much more simple can be done here.
Any suggestions or ideas are appreciated.
You'll have to build your own custom panel, and handle the case where the AvailableWidth is less then the panel's children DesiredWidth
Panel layout in WPF (Grid is a Panel) is a 2 step process, in the first pass the Panel iterates over its children and provides them with the panel's AvailableWidth. The children respond to this by computing their DesiredWidth.
In the second pass the Panel arranges the children according to their DesiredWidth. In this second pass you have access to the width that all the children (in your case, TextBlocks) require. If it is less than the panel's available width you can compute a percentage to give each one so that they appear to shrink uniformly.
Here's a resource that shows how you can create your own custom panel
What about this?
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="1*"/>
<ColumnDefinition Width="1*"/>
<ColumnDefinition Width="1*"/>
</Grid.ColumnDefinitions>
My group is building an editor-type app in WPF. One thing we noticed is that on my WinXP machine, running with the "windows classic style" theme, the text on buttons is fits fine. However on my friend's machine, who's running with the "windows xp style" theme, the font size is bigger so text on buttons get clipped at the bottom.
Is there a way to handle this nicely, like automatically resizing controls to fit the text?
I hesitate to manually resize the button to fit his layout as anyone else can have totally different settings through the Display Properties and Accessibility Options.
Thanks!
A WPF button will automatically resize to fit the content that it has been given, however it will only do this when it is inside a container that does not enforce size and its size has not been set manually. To prove this mess around with the font size in the following code snippet:
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Button
Grid.Column="1"
Grid.Row="1"
FontSize="24"
Content="QWERTY"/>
</Grid>
I guess that your buttons haven't resized because you have constrained them. To fix this you need to decide how you want them to resize (which can be very complicated when elements would overlap if they just grew blindly) and if none of the supplied panel types perform the growth behaviour that you are looking for then you may need to write your own that does.
Have you hardcoded element sizes using Width and Height properties? In WPF the recommended way to do this is to use the several layout containers.
The following is an example of a grid which lays two buttons at the bottom and a textbox at the top.
<Grid>
<Grid.RowDefinitions>
<!-- TextBox row with unspecified height. -->
<RowDefinition Height="*"/>
<!-- Button row with automated height so it resizes to
fit the content -->
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<!-- Textbox on first row. -->
<TextBox Margin="3" Name="textBox1" Grid.Row="0" AcceptsReturn="True" />
<!-- StackPanel which lays the two buttons at the bottom horizontally.
RightToLeft is specified so that the first button appears on right.
-->
<StackPanel Grid.Row="1" HorizontalAlignment="Right"
Orientation="Horizontal" FlowDirection="RightToLeft">
<!-- The buttons. Only padding and margin are hardcoded so these
can resize to the contents -->
<Button Padding="3" Margin="3">OK</Button>
<Button Padding="3" Margin="3">Cancel</Button>
</StackPanel>
</Grid>