Here I have the following simple window:
The upper part is a DataGrid, below is a TextBox. The window is set to size to content's width. This is the desired layout.
Now I need to display some richtext so I replace the TextBox with RichTextBox. The problem is that now the window stretches to the width of the screen, like so (I've shrunk it, of course, but you get the idea):
I've tried binding the RichTextBox's width to the actual width of the parent:
<RichTextBox Width="{Binding ElementName=Wrapper, Path=ActualWidth}"/>
but it still expands to the entire window. BTW the same happens if I use TextBox in the above code.
How can I make the RichTextBox's width fit to the parent, while still maintaining dynamic window layout? I mean the DataGrid is the key element to which both the windows's width and the RichTextBox's width must be subject to.
Below is the full code.
XAML
<Window x:Class="RichTextBox_Wrap.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:RichTextBox_Wrap"
mc:Ignorable="d"
SizeToContent="Width"
Title="MainWindow" Height="250" >
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="30"/>
<RowDefinition/>
</Grid.RowDefinitions>
<DataGrid Grid.Row="0"
HeadersVisibility="Column"
CanUserAddRows="False"
ItemsSource="{Binding Items}">
</DataGrid>
<StackPanel Grid.Row="1" HorizontalAlignment="Center" VerticalAlignment="Center">
<TextBlock Text="Info" />
</StackPanel>
<DockPanel x:Name="Wrapper" Grid.Row="2">
<Border BorderBrush="CadetBlue" BorderThickness="1">
<RichTextBox />
</Border>
</DockPanel>
</Grid>
</Window>
C#
public class Item
{
public string Name { get; set; }
public string Description { get; set; }
public double Price { get; set; }
}
public class ViewModel
{
public ObservableCollection<Item> Items { get; set; }
public ViewModel()
{
Items = new ObservableCollection<Item>
{
new Item {Name = "Apple", Description="Fruit", Price=3},
new Item {Name = "Banana", Description="Fruit", Price=5},
new Item {Name = "Tomato", Description="Vegetable", Price=4},
};
}
}
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
DataContext = new ViewModel();
}
}
SOLUTIONS
1.
mm8's solution almost works but it seems that Loaded event happens to early to calculate the ActualWidth properly - the RichTextBox doesn't fill the width and leaves gaps. But taking the idea further I used the window's "Content_Rendered" event to fix the window's width and then set RichTextBox's width to auto.
<RichTextBox x:Name="RichBox" Grid.Row="1" MinHeight="75" Width="0" Visibility="Hidden" />
private void Window_ContentRendered(object sender, EventArgs e)
{
var window = sender as Window;
window.SizeToContent = SizeToContent.Manual;
window.Width = window.ActualWidth;
RichBox.Width = double.NaN;
RichBox.Visibility = Visibility.Visible;
}
2. Spongebrot was spot on. Indeed, when the extra border is removed binding to parent's ActualWidth works. But in real life my control is more complex and the border is there for a reason. But this can be solved by cascading bindings:
<DockPanel x:Name="Wrapper" Grid.Row="2" >
<Border x:Name="MyBorder" BorderBrush="CadetBlue" BorderThickness="1" Width="{Binding ElementName=Wrapper, Path=ActualWidth}" >
<RichTextBox x:Name="RichBox" Width="{Binding ElementName=MyBorder, Path=Width}" />
</Border>
</DockPanel>
It seems that binding to ActualWidth doesn't work as expected if you bind to a grandparent or more distant ancestor. This is seemingly why Sinatr's suggestion doesn't work either.
An easy workaround would be to set the Width of the RichTextBox to 0 in the XAML markup and then handle its Loaded event and set the Width to the window's width once it has been loaded:
<RichTextBox Width="0" Loaded="RichTextBox_Loaded" />
private void RichTextBox_Loaded(object sender, RoutedEventArgs e)
{
RichTextBox rtb = sender as RichTextBox;
rtb.Width = this.Width;
}
SizeToContent="Width"
So you want the window to autosize to DataGrid width?
RichTextBox seems special, it will request maximum available space from its parent container, occupying the whole combined desktops width at will. An easy fix is to limit width of it:
<Grid>
<DataGrid x:Name="dataGrid" />
<DockPanel>
<Border>
<RichTextBox Width="{Binding ActualWidth, ElementName=dataGrid}" />
</Border>
</DockPanel>
</Grid>
Related
I want my Popup to always appear in a specific corner (lower right corner e.g.) no matter the size and the resolution of my View.
I tried using HorizontalAlignment and VerticalAlignment but it's not really working.
Here's my code :
<Grid x:Name="Output" HorizontalAlignment="Right" VerticalAlignment="Bottom" Grid.Row="1">
<Popup x:Name="StandardPopup">
<Border BorderBrush="{StaticResource ApplicationForegroundThemeBrush}"
Background="{StaticResource ApplicationPageBackgroundThemeBrush}"
BorderThickness="2" Width="500" Height="500">
<StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">
<WebView x:Name="WebView1" Source="https://www.bing.com/" Width="490" Height="490" HorizontalAlignment="Center"/>
</StackPanel>
</Border>
</Popup>
</Grid>
You can create a UserControl to help you achieve this.
Create a new UserControl called TestPopup
<UserControl
...
>
<Grid>
<Grid HorizontalAlignment="Right" VerticalAlignment="Bottom">
<Border BorderBrush="{StaticResource ApplicationForegroundThemeBrush}"
Background="{StaticResource ApplicationPageBackgroundThemeBrush}"
BorderThickness="2" Width="500" Height="500">
<StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">
<WebView x:Name="WebView1" Source="https://www.bing.com/" Width="490" Height="490" HorizontalAlignment="Center"/>
</StackPanel>
</Border>
</Grid>
</Grid>
</UserControl>
The code-behind:
public sealed partial class TestPopup : UserControl
{
private Popup _popup = null;
public TestPopup()
{
this.InitializeComponent();
// If you need to top placement, please comment out the Width/Height statement below
this.Width = Window.Current.Bounds.Width;
this.Height = Window.Current.Bounds.Height;
//Assign the current control to the Child property of the popup. The Child property is what the popup needs to display.
_popup = new Popup();
_popup.Child = this;
}
public void ShowPopup()
{
_popup.IsOpen = true;
}
public void HidePopup()
{
_popup.IsOpen = false;
}
}
Use C# code references where needed
public sealed partial class MainPage : Page
{
private TestPopup _popup = new TestPopup();
public MainPage()
{
this.InitializeComponent();
_popup.ShowPopup();
}
}
To ensure that it is in the lower right corner at any width, you can listen to the page's SizeChanged event.
private void Page_SizeChanged(object sender, SizeChangedEventArgs e)
{
_popup.Width = Window.Current.Bounds.Width;
_popup.Height = Window.Current.Bounds.Height;
// If you need to use the Width/Height of the page
// _popup.Width = e.NewSize.Width;
// _popup.Height = e.NewSize.Height;
}
Best regards.
Sadly Popup does not support Alignments you have to use the Offset Values
NOTE: Don't forget that you can use Bindings for Offsets and so get your wanted behavior with some Converter magic.
<Popup HorizontalOffset="20"
VerticalOffset="10">
<!--Content-->
</Popup>
I'm trying to create an expandable/collapsible menu for a personal project of mine. I have everything almost where I want it (in terms of it being behaving as expected anyway). When I collapse my menu, I want the buttons to rotate to a vertical position and not resize (Or at least resize to something that still fits the text). At the moment, the buttons rotate, then shrink vertically (what was/is the width) along with the parent control, which cuts off much of the contents. I can see why this would happen, but I can't think of a way around it that seems right to me.
Here is the behavior I'm seeing:
Before: After:
As you can see, the buttons are shrinking along their now-vertical width (to what I assume would be the width of the enclosing StackPanel).
Here is the code I am using:
ExpaningMenu.xaml
<UserControl x:Class="Budgety.Controls.ExpandingMenu"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:Budgety.Controls"
mc:Ignorable="d"
Name="MainExpandingMenu"
MinWidth="32"
d:DesignHeight="300" d:DesignWidth="100">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition />
</Grid.RowDefinitions>
<StackPanel Name="MenuPanel" Width="100" HorizontalAlignment="Left" Background="{DynamicResource BackColor}" Grid.Row="1">
<!--Contents will go here-->
</StackPanel>
<Button Name="StateToggle" Width="100" Height="32" FontSize="18" VerticalAlignment="Center" HorizontalAlignment="Stretch" Panel.ZIndex="1" Background="{DynamicResource BackColor}" BorderThickness="0" Click="Button_Click" Content="«"></Button>
</Grid>
</UserControl>
ExpandingMenu.xaml.cs
public partial class ExpandingMenu : UserControl
{
public ExpandingMenu()
{
InitializeComponent();
//For testing purposes.
MenuPanel.Children.Add(new ExpandingMenuButton("TEST ITEM 1"));
MenuPanel.Children.Add(new ExpandingMenuButton("TEST ITEM 2"));
MenuPanel.Children.Add(new ExpandingMenuButton("TEST ITEM 3"));
MenuPanel.Children.Add(new ExpandingMenuButton("TEST ITEM 4"));
MenuPanel.Children.Add(new ExpandingMenuButton("TEST ITEM 5xxx"));
foreach (UIElement element in MenuPanel.Children)
{
(element as ExpandingMenuButton).HorizontalAlignment = HorizontalAlignment.Left;
}
}
#region Events
private void Button_Click(object sender, RoutedEventArgs e)
{
if (MenuPanel.Width == 100) //Need to collapse
{
StateToggle.Width = MenuPanel.Width = 32;
(sender as Button).Content = "\u00BB";
//Flip all children of this control (so far, assuming only ExpandingMenuButtons)
foreach (UIElement element in MenuPanel.Children)
{
(element as ExpandingMenuButton).LayoutTransform = new RotateTransform(-90);
//This works to resize to 100 tall (not ideal...)
//(element as ExpandingMenuButton).Width = 100;
//This does not seem to size to auto, which SHOULD make each button as long as the text requires... (this behavior is far less than ideal...)
//(element as ExpandingMenuButton).Width = Double.NaN;
}
}
else //Need to expand
{
StateToggle.Width = MenuPanel.Width = 100;
(sender as Button).Content = "\u00AB";
//Flip all children of this control (so far, assuming only ExpandingMenuButtons)
foreach (UIElement element in MenuPanel.Children)
{
(element as ExpandingMenuButton).LayoutTransform = new RotateTransform(0);
}
}
}
#endregion
}
ExpandingMenuButton.xaml
<UserControl x:Class="Budgety.Controls.ExpandingMenuButton"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:Budgety.Controls"
mc:Ignorable="d"
d:DesignHeight="30" d:DesignWidth="100"
Height="30"
Name="ButtonControl">
<Grid Name="ButtonGrid" Height="30">
<ToggleButton Name="MenuButton" Background="Aqua" BorderThickness="1" Content="TEST"></ToggleButton>
</Grid>
</UserControl>
ExpandingMenuButton.xaml.cs
public partial class ExpandingMenuButton : UserControl
{
//Will definitely want custom functionalty here. TBD. Nothing special so far.
#region Constructors
public ExpandingMenuButton()
{
InitializeComponent();
}
public ExpandingMenuButton(string sText)
{
InitializeComponent();
MenuButton.Content = sText;
}
#endregion
}
If you'd like to test the code out, it should work placed in a normal grid as I have (The above mentioned UserControls I've made are in a Controls folder within the project):
<Window
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:Budgety"
xmlns:Controls="clr-namespace:Budgety.Controls" x:Class="Budgety.MainTest"
mc:Ignorable="d"
Title="MainTest" Height="600" Width="800">
<Grid>
<Controls:ExpandingMenu x:Name="ExpandingMenu" HorizontalAlignment="Left"/>
</Grid>
</Window>
After all is said and done, here is the behavior/look I am after (notice buttons are not shortened)
The reason for the layout you're seeing is the fixed height constraint you placed in ExpandingMenuButton: Height="30" on both the UserControl and the Grid element. You can change it to MinHeight.
In addition, when you set the width of the MenuPanel, you're also containing the height of the buttons, because you apply a transform.
Here's one way to fix this:
private void Button_Click(object sender, RoutedEventArgs e)
{
if (StateToggle.IsChecked == true)
{
StateToggle.Content = "\u00BB";
foreach (FrameworkElement element in MenuPanel.Children)
element.LayoutTransform = new RotateTransform(-90);
}
else
{
StateToggle.Content = "\u00AB";
foreach (FrameworkElement element in MenuPanel.Children)
element.LayoutTransform = null;
}
}
XAML:
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition />
</Grid.RowDefinitions>
<StackPanel Name="MenuPanel"
HorizontalAlignment="Left"
Background="{DynamicResource BackColor}"
Grid.Row="1">
<!--Contents will go here-->
</StackPanel>
<ToggleButton Name="StateToggle"
FontSize="18"
VerticalAlignment="Center"
HorizontalAlignment="Stretch"
Panel.ZIndex="1"
Background="{DynamicResource BackColor}"
BorderThickness="0"
Click="Button_Click"
Content="«" />
</Grid>
As a general rule, don't specify widths and heights in WPF - let the layout system do the measuring for you according to the content.
I have following xaml code:
<Window x:Class="WPF_les_3.Oefening_4"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Oefening_4" Height="300" Width="300">
<StackPanel Width="auto" Margin="20px">
<ComboBox Width="100" SelectionChanged="ComboBox_Selected" x:Name="comboBox">
<ComboBoxItem>
<StackPanel Orientation="Horizontal">
<Rectangle Fill="Red" Height="20" Width="20"/>
<TextBlock Text=" Red"/>
</StackPanel>
</ComboBoxItem>
<ComboBoxItem>
<StackPanel Orientation="Horizontal">
<Rectangle Fill="Yellow" Height="20" Width="20"/>
<TextBlock Text=" Yellow"/>
</StackPanel>
</ComboBoxItem>
<ComboBoxItem>
<StackPanel Orientation="Horizontal">
<Rectangle Fill="Green" Height="20" Width="20"/>
<TextBlock Text=" Green"/>
</StackPanel>
</ComboBoxItem>
</ComboBox>
</StackPanel>
As you see, inside my ComboboxItems I have a rectangle and a textblock. Now I want to retreive the fill color of the rectangle (or the text of the textblock, it's the same) when my selectionchanged event is handled, so I can change the background of the window according to the selected color (which is the goal of the excercise).
To elaborate on my comment above, this is the Correct way to achieve what you need in WPF:
First of all, create a proper ViewModel that contains the list of available colors and a SelectedColor property:
public class ColorsViewModel
{
public ObservableCollection<string> Colors { get; private set; }
private string _selectedColor;
public string SelectedColor
{
get { return _selectedColor; }
set
{
_selectedColor = value;
MessageBox.Show("Selected Color: " + value); //message box here to show the code is actually working.
}
}
//... More code here in a moment
}
Then, make sure you populate the color collection with relevant data. In the case of colors specifically, WPF has built-in TypeConverters that can convert from (for example) string to System.Windows.Media.Color implicitly, therefore we can leverage that to simplify our code and use simple strings:
//Continuation of the above code
public ColorsViewModel()
{
Colors = new ObservableCollection<string>
{
"Red",
"Green",
"Blue",
"Yellow",
};
}
And finally create the UI in XAML using proper DataBinding:
<Window x:Class="WpfApplication3.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">
<ComboBox ItemsSource="{Binding Colors}"
SelectedItem="{Binding SelectedColor}"
VerticalAlignment="Center" HorizontalAlignment="Center">
<ComboBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<Rectangle Fill="{Binding}" Height="20" Width="20"/>
<TextBlock Text="{Binding}"/>
</StackPanel>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
</Window>
Result:
The change event is fired and the ComboBox.SelectedItem has the info you need.
You have to analyze the SelectedItem like my following method:
private void comboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
ComboBoxItem comboBoxItem = this.comboBox.SelectedItem as ComboBoxItem;
if (comboBoxItem != null)
{
StackPanel stackPanel = comboBoxItem.Content as StackPanel;
if(stackPanel != null && stackPanel.Children[0] is Rectangle)
{
var fill = (stackPanel.Children[0] as Rectangle).Fill;
}
}
}
Here you get the fill of the rectangle and can handle this or do your stuff.
But be patient, this code is created exactly for you sample (ComboBoxItem with Content StackPanel with Children[0] as Rectangle). Changes will iterrupt the process ;)
I have a ScrollViewer that contains a Grid of images. I am not sure if using a grid is the correct choice. Here is a mockup image of what I want it to look like:
The red box represents the ScrollViewer. Inside it, is some type of layout container (Grid at the moment) that has two rows of images (green squares) but a dynamic amount of columns that can change at runtime, that can be scrolled to. Another condition is that I want to resize them so that 6 images (and only 6!) are always visible.
So in XAML:
<ScrollViewer Name="scrollViewer1">
<Grid Name="grid1"></Grid>
</ScrollViewer>
Then using C# I think I need to dynamically add columns. Then listening to scrollViewer1's SizeChanged event I need to dynamically calculate the size of the rows and columns so that 3 images are always in view. For example:
ColumnDefinition gridColN = new ColumnDefinition();
grid1.ColumnDefinitions.Add(gridColN);
Problem #1: Dynamically adding more columns makes the grid cells keep getting smaller and smaller and never scroll within the ScrollViewer until there are 10+ columns.
Expected result: The end result should be a horizontal stream of images, 6 visible at a time, that will resize when the outter container or window is resized. I am trying to size their width dynamically, but setting them to 1/3 of the containers width does not work.
Questions: Is this the correct approach? Should I use Grid inside the ScrollViewer? Do I have to manually calculate the sizes or is there a way to let them fill the container?
Grid width should be calculated as
grid1.Width = (scrollViewer1.ViewportWidth / 3) * grid1.ColumnDefinitions.Count;
grid1.Height = (scrollViewer1.ViewportHeight / 2) * grid1.RowDefinitions.Count;
This seemed to work for me:
XAML:
<DockPanel>
<ListBox Width="150" DockPanel.Dock="Left" BorderBrush="AliceBlue" BorderThickness="2">
<Button Name="AddColumn_Button" Width="100" Height="25" Content="Add Column" Click="AddColumn_Button_Click" Margin="5"/>
<Button Name="AddRow_Button" Width="100" Height="25" Content="Add Row" Margin="5" Click="AddRow_Button_Click" />
</ListBox>
<ScrollViewer Name="scrollViewer1" BorderBrush="AliceBlue" BorderThickness="2" SizeChanged="scrollViewer1_SizeChanged" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto" Margin="1">
<Grid Name="grid1" ShowGridLines="True" >
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition />
<ColumnDefinition />
</Grid.ColumnDefinitions>
</Grid>
</ScrollViewer>
</DockPanel>
CODE BEHIND:
private void scrollViewer1_SizeChanged(object sender, SizeChangedEventArgs e)
{
SizeGrid();
}
private void AddColumn_Button_Click(object sender, RoutedEventArgs e)
{
ColumnDefinition gridColN = new ColumnDefinition();
grid1.ColumnDefinitions.Add(gridColN);
SizeGrid();
}
private void AddRow_Button_Click(object sender, RoutedEventArgs e)
{
RowDefinition row = new RowDefinition();
grid1.RowDefinitions.Add(row);
SizeGrid();
}
private void SizeGrid()
{
grid1.Width = (scrollViewer1.ViewportWidth / 3) * grid1.ColumnDefinitions.Count;
grid1.Height = (scrollViewer1.ViewportHeight / 2) * grid1.RowDefinitions.Count;
}
I have the following code:
<Window.Resources>
<DataTemplate x:Key="SectionTemplate" >
<TextBlock Text="{Binding Path=Name}" />
</DataTemplate>
</Window.Resources>
<Grid >
<Border>
<HeaderedItemsControl Header="Top1"
ItemsSource="{Binding Path=List1}"
ItemTemplate="{StaticResource SectionTemplate}"/>
</Border>
</Grid>
public class MainWindow
{
public List<Item> List1
{
get { return list1; }
set { list1 = value; }
}
public MainWindow()
{
list1.Add(new Item { Name = "abc" });
list1.Add(new Item { Name = "xxx" });
this.DataContext = this;
InitializeComponent();
}
}
public class Item
{
public string Name { get; set; }
}
For some reason the Items are rendered, but without the header.
As the documentation points out:
A HeaderedItemsControl has a limited default style. To create a HeaderedItemsControl with a custom appearance, create a new ControlTemplate.
So when you create that template make sure to include some ContentPresenter which is bound to the Header (e.g. using ContentSource)
e.g.
<HeaderedItemsControl.Template>
<ControlTemplate TargetType="{x:Type HeaderedItemsControl}">
<Border>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition />
</Grid.RowDefinitions>
<ContentPresenter ContentSource="Header" />
<Separator Grid.Row="1" />
<ItemsPresenter Grid.Row="2" />
</Grid>
</Border>
</ControlTemplate>
</HeaderedItemsControl.Template>
(All the default bindings (Margin, Background, etc.) are omitted.)
You can make a DataTemplate for the header, just as you did for the items (which is surely less intrusive than redoing the entire control template).
e.g.
<Window.Resources>
<DataTemplate x:Key="HeaderTemplate">
</DataTemplate>
</Window.Resources>
<HeaderedItemsControl Header="Top1"
HeaderTemplate="{StaticResource HeaderTemplate}"
ItemsSource="{Binding Path=List1}"
ItemTemplate="{StaticResource SectionTemplate}"
/>
Instead of using e.g. "Top1" as here, you can bind to an object and then use binding relative to that object in the DataTemplate.
There is one gotcha with this approach, which is that the necessary approach to getting styles pulled in for non-control elements (notably TextBlock) is a little convoluted; also see WPF Some styles not applied on DataTemplate controls. (You might also run into this with the ControlTemplate approach.)