Using WPF, I have a Window, that is filled with one Grid. Currently this Grid has one Row and three Columns, each cell filled with the same UserControl.
Future versions might add more Rows to the Grid.
I want to make my window have the size of the Grid.
<Window
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns: ...
...
mc:Ignorable="d"
d:DesignHeight="600" d:DesignWidth="600"
Title="MainWindow" Height="600" Width="600">
<Grid Name="MainGrid">
<Grid.RowDefinitions>
<RowDefinition Height="auto"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<View:ImageView Grid.Row="0" Grid.Column="0" DataContext="..."/>
<View:ImageView Grid.Row="0" Grid.Column="1" DataContext="..."/>
<View:ImageView Grid.Row="0" Grid.Column="2" DataContext="..."/>
</Grid>
The Window has a Width of 600. The Grid will stretch to this window. It will have a Width about 600. The Grid will have three columns with the same Width, something near 200. The ImageView in each cell will stretch to fill the Cell. Each Cell will have a Width about 200.
This determines the Height of the Cells, and thus the Height of the Grid.
Addition: after comments I don't want to resize the window. After it decided about what it should displays and what sizes the controls should have to display it nicely, there is no need to resize it.
For debugging, to see what happens, I resized the mainwindow, and recorded what happens to the various Height / Width / ActualHeight / ActualWidth values.
I noticed that the Grid is resized, such that its Width exactly fills the Width of the Window. Resizing will also Resize the cells and the ImageViews that are in the Cells.
This fitting is not the case with the Height. I can make the Height window Higher and Lower than the Height of the Grid.
I want to set the Height of the window such that it is exactly around the Grid.
I expected something like:
<Window ... Width = "600" Height = "auto" />
Nope, the height is way large than it should be, somewhere near 1000. The Grid is still about 300 x 600.
<Window ... Width = "600" Height = "*" />
This leads to an exception.
Maybe Binding? Something like this?
<Window ... Width = "600" Height = "{Binding Height, ElementName=MainGrid, Mode=OneWay}"/>
<Window ... Width = "600" Height = "{Binding ActualHeight, ElementName=MainGrid, Mode=OneWay}"/>
Nope, still way to large.
So, how to make sure that the window is exactly around the Grid?
Remove the Height from the window and set SizeToContent to Height. However, this will only set the width and height that you expect initially, not on resizing.
<Window
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns: ...
...
mc:Ignorable="d"
d:DesignHeight="600"
d:DesignWidth="600"
Title="MainWindow"
Width="600"
SizeToContent="Height">
If you want to resize the window like you describe, it would mean to keep the aspect ratio and this not easy to solve without unexpected effects or you would have to restrict resizing to the horizontal direction only, which is not trivial either. You can have a look at these related questions.
Resize a WPF window, but maintain proportions?
WPF Window - Only allow horizontal resize
Of course you could also listen for resize events of the window and do custom processing there, but this approach and also the ones above might harm your user experience and could introduce unwanted effects, so maybe it is more advisable to revisit the layout concept.
As #thatguy says, what you're asking for is difficult to do well. In general you don't want code that attempts to resize a window after a user resizes it because you'll get conflicts between what the user's trying to do and the code wants to do.
That still leaves you with a few options if you don't want your images clipped and want them to fill the window as much as possible, which I think is what you're asking for.
1/ You can maintain the aspect ratios of your images, resize them to fill the screen in one or the other direction, and accept you can get whitespace:
2/ You can stretch your images to fill the available space, and hence always fill the entire window as you resize, but losing the aspect ratio:
Code for these is below. Maintaining aspect ratios:
<Window x:Class="ImageResizeTest.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:ImageResizeTest"
mc:Ignorable="d"
Title="MainWindow" Width="600" Height="110">
<Grid Name="MainGrid">
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Image Grid.Row="0" Grid.Column="0" Source="https://upload.wikimedia.org/wikipedia/commons/3/30/Googlelogo.png" />
<Image Grid.Row="0" Grid.Column="1" Source="https://upload.wikimedia.org/wikipedia/commons/3/30/Googlelogo.png" />
<Image Grid.Row="0" Grid.Column="2" Source="https://upload.wikimedia.org/wikipedia/commons/3/30/Googlelogo.png" />
</Grid>
</Window>
Stretching images to fill:
<Window x:Class="ImageResizeTest.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:ImageResizeTest"
mc:Ignorable="d"
Title="MainWindow" Width="600" Height="110">
<Grid Name="MainGrid">
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Image Grid.Row="0" Grid.Column="0" Stretch="Fill" Source="https://upload.wikimedia.org/wikipedia/commons/3/30/Googlelogo.png" />
<Image Grid.Row="0" Grid.Column="1" Stretch="Fill" Source="https://upload.wikimedia.org/wikipedia/commons/3/30/Googlelogo.png" />
<Image Grid.Row="0" Grid.Column="2" Stretch="Fill" Source="https://upload.wikimedia.org/wikipedia/commons/3/30/Googlelogo.png" />
</Grid>
</Window>
Related
I have created a WPF application that generate tiles in the second row of grid. What i'm trying to achieve is to keep rendering tiles in the second row without showing the vertical scroll bar, until unless the height of WPF application crosses the resolution of user screen.
<Window x:Class="ABC.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="ABC Installation" MinWidth="620" SizeToContent="WidthAndHeight" AllowsTransparency="True" WindowStyle="None" Loaded="MainWindow_loaded" MinHeight="600" >
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="60" />
<RowDefinition Height="56" />
<RowDefinition Height="Auto" ScrollViewer.IsDeferredScrollingEnabled="True" />
<RowDefinition Height="94"/>
</Grid.RowDefinitions>
</Grid>
<ScrollViewer Name="productsOuterScroll" Grid.Row="2" HorizontalScrollBarVisibility="Hidden" ScrollViewer.VerticalScrollBarVisibility="Auto" Grid.RowSpan="1" >
<StackPanel x:Name="FormStackPanel">
</StackPanel>
</ScrollViewer>
This code renders all the tiles exceeding the user screen window height without a vertical scroll bar.
Any idea how to do this? Any help would be appreciated.
If you want the content to scroll, remove the Height from the RowDefinition of the row that you are adding content to, and put the content inside the ScrollViewer.
Your window might be sizing correctly to the vertical resolution of the screen, but if it's displayed in the center of the screen, it will exceed the height. You can set the startup location to top of the screen with:
WindowStartupLocation="Manual" Top="0"
If the window height is too high, you might want to set maximum height for your window.
I figured out the mistake. Only two things needed to be done.
remove the height attribute from row definition so it should look like this
<Window x:Class="ABC.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="ABC Installation" MinWidth="620" SizeToContent="WidthAndHeight" AllowsTransparency="True" WindowStyle="None" Loaded="MainWindow_loaded" MinHeight="600" >
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="60" />
<RowDefinition Height="56" />
<RowDefinition ScrollViewer.IsDeferredScrollingEnabled="True" />
<RowDefinition Height="94"/>
</Grid.RowDefinitions>
<ScrollViewer Name="productsOuterScroll" Grid.Row="2" HorizontalScrollBarVisibility="Hidden" ScrollViewer.VerticalScrollBarVisibility="Auto" Grid.RowSpan="1" >
<StackPanel x:Name="FormStackPanel">
</StackPanel>
</ScrollViewer>
</Grid>
Setting the max Height dynamically according to the users primary screen height in .cs file
double userheightscreen = System.Windows.SystemParameters.PrimaryScreenHeight;
this.MaxHeight = userheightscreen - 100;
PS: "-100" is just to leave some space on top and bottom of the screen.
I'm an experienced developer, but new to C# and the Windows Runtime. I'm trying to create a custom UserControl (a specialized button) that can be dynamically sized. My button should have three rows of text on it (Top, Middle, Bottom) which are given proportional sizes (1*, 3*, 1*). I want the textboxes to fill their given space in the grid. i.e. If the button is 500x200, then the internal TextBoxes would all be 200 wide, the Top one would be 100 pixels tall, the Middle would be 300 tall, and the bottom would be 100 tall. If the button is 700x300, Top=140, Middle=420, Bottom=140.
I created a Grid with proportionally sized Rows and it behaves the way I want, but I don't know how to get the child elements in the grid to fill their space in the grid cell.
<UserControl
x:Class="DynamicButtons.DynamicButton"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:DynamicButtons"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
d:DesignHeight="300"
d:DesignWidth="400">
<Grid Background="SlateGray">
<Grid.RowDefinitions>
<RowDefinition Height="1*" />
<RowDefinition Height="3*" />
<RowDefinition Height="1*" />
</Grid.RowDefinitions>
<TextBox Text="Top" Grid.Row="0" Margin="0,0,0,0" TextAlignment="Center" />
<TextBox Text="Middle" Grid.Row="1" Margin="0,0,0,0" TextAlignment="Center" />
<TextBox Text="Bottom" Grid.Row="2" Height="Auto" Margin="0,0,0,0" TextAlignment="Center" />
</Grid>
</UserControl>
If you add VerticalAlignment="Stretch" to your TextBox definitions, they'll fill the vertical space.
I'm developing an UserControl named Matrix2D to display 2 dimension matrix points in a x,y custom graphic.
Strange thing is, if I set Auto to Width/Height the columns/rows to the Grid that contains this Matrix2D control, like this:
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition />
</Grid.RowDefinitions>
<elem:Matrix2D x:Name="matrix2"
Grid.Row="0"
Grid.Column="0"
MaximumX="255"
MaximumY="127"
ZoomScale="1" />
</Grid>
I get the expected result (clean pixels):
I have also the expected result if I set HorizontalAlignment="Left" and VerticalAlignment="Top", like this:
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<elem:Matrix2D x:Name="matrix2"
Grid.Row="0"
Grid.Column="0"
MaximumX="255"
MaximumY="127"
HorizontalAlignment="Left"
VerticalAlignment="Top"
ZoomScale="1" />
</Grid>
Although, If I don't set Auto to Grid neither set the Alignment, like this:
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<elem:Matrix2D x:Name="matrix2"
Grid.Row="0"
Grid.Column="0"
MaximumX="255"
MaximumY="127"
ZoomScale="1" />
</Grid>
I get this blur result:
I already test several ways of developing this user control, with always the same result.
This is the current version:
<UserControl x:Class="Matrix2D"
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"
d:DesignHeight="300"
d:DesignWidth="300"
mc:Ignorable="d">
<Grid Background="White">
<Image x:Name="populationImg" Stretch="None" />
</Grid>
</UserControl>
In code behind:
I populate a WriteableBitmap and then I set populationImg.Source with it.
Already test the trick of setting RenderOptions.BitmapScalingMode="NearestNeighbor", but the result is approximate, and since this a Scientific Graphic I need that it be accurate. You can check in the corners of this result that is not accurate:
Even more visible in smaller graphic:
Setting RenderOptions.EdgeMode="Aliased" doesn't change anything.
Update
This explains why I have this blur effect:
To properly center an image, the container should have an even width,
height if the image's pixel width, height are even. If the image has
an odd pixel width, height, the containing element should also have an
odd width, height.
from Pixel Snapping in WPF Applications (In #Nicolas Repiquet answer)
Although, it didn't actually helped me to solve my problem. I would like that my user control be independent of its container. Any ideas how to do this?
My guess is that your control position within the parent container is not aligned to the pixel grid (ie, the x and y coordinates of your control on the screen is not a round number of pixels).
Try this :
<elem:Matrix2D SnapsToDevicePixels="true" ... />
UIElement.SnapsToDevicePixels Property
EDIT
"To properly center an image, the container should have an even width, height if the image's pixel width, height are even. If the image has an odd pixel width, height, the containing element should also have an odd width, height. " from Pixel Snapping in WPF Applications
I have a WPF window with a button on it. I want the button to increase or decrease in width depending on its text. How can I do this?
Just set the Width property to Auto and give an HorizontalAlignment (Center, Rightor Left), because its default value is Stretch, and this cause to Fill its container.
Here is an example on how it works:
CODE
<Window x:Class="StackOverflow.WPF.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Grid>
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<Button Content="A Default Button"/>
<Button Content="An Auto Width Button"
Width="Auto"
HorizontalAlignment="Center"
Grid.Column="1"/>
<Button Content="An Auto Width and Height Button"
Width="Auto" Height="Auto"
HorizontalAlignment="Center"
VerticalAlignment="Center"
Grid.Column="0" Grid.Row="1"/>
</Grid>
</Window>
OUTPUT
I you don^t set a fixed width to your button, it will already adapt its width to its content.
I have created a simple WPF application with following XAML code:
<Window x:Class="WpfApplication1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525" SizeToContent="WidthAndHeight">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Button MinWidth="200" MinHeight="40" Content="Hello 1"/>
<Button MinWidth="200" MinHeight="40" Content="Hello 2" Grid.Column="1"/>
</Grid>
</Window>
If I start the application I can resize the windows to a smaller size than the two buttons.
As you can see I have used the MinWidth and MinHeight properties, but they didn't work.
Please help me in this case.
Regards,
Thomas
You probably already solved your problem but I'll leave a simple solution for anyone who is still new to WPF (like me).
Inside the <Window> tag, add an event handler to the ContentRendered event:
<Window x:Class="MyTest.MyForm"
...
...
SizeToContent="WidthAndHeight"
ContentRendered="Window_ContentRendered">`
Then add the code-behind:
private void Window_ContentRendered(object sender, EventArgs e)
{
MinWidth = ActualWidth;
MinHeight = ActualHeight;
}
This way, the window will calculate its size first (based on SizeToContent="WidthAndHeight"), then you set the minimum values after it renders its content, thus preventing the user from resizing it to be smaller than the content.
You might want to add MinHeight and MinWidth to the WINDOW level to never go smaller than the smallest elements you are expecting WITHIN its content...
Title="MainWindow" Height="350" Width="525" MinHeight="90" MinWidth="410" SizeToContent="WidthAndHeight"
two buttons high of 40 (80) Plus some arbitrary gap (10) = min height of 90... Likewise for the width. Two buttons minimum width of 200 = 400 total plus arbitrary gap (10) = 410.