Is there a way that I can click on a WrapPanel's children and get the children, but without having to insert a Click event in every children? Can I just insert a Click event on the WrapPanel?
my code below:
<ScrollViewer Name="scrollViewer" HorizontalScrollBarVisibility="Disabled" VerticalScrollBarVisibility="Auto" Height="500" Margin="1085,154,-89,0" HorizontalAlignment="Left" Width="267" VerticalAlignment="Top">
<WrapPanel Name="Agenda" HorizontalAlignment="Left" Height="Auto" VerticalAlignment="Top" Width="265" Background="#FFEEF4FF">
<Border Name="b06x00" BorderThickness="1" Width="265" BorderBrush="Black" Visibility ="Visible">
<TextBlock TextWrapping="Wrap" Text="06:00" Width="265" Height="15" Background="White"/>
</Border>
...
this Border + TextBlock is repeated 70 times. It's an agenda by the way.
...
</WrapPanel>
</ScrollViewer>
You can handle for example MouseDown event on your WrapPanel as it will bubble up from any control within that panel
<WrapPanel Name="Agenda" ... MouseDown="Agenda_MouseDown">
and in the event handler you can check for OriginalSource like so:
private void Agenda_MouseDown(object sender, MouseButtonEventArgs e)
{
var textBlock = e.OriginalSource as TextBlock;
}
Related
It's my first time using the MVVM pattern and I have a bit of trouble understanding how everything ties together.
I have a UserControl with a Textbox element which should change the Width of said UserControl based on it's input.
I'm facing two problems:
For my idea to work, I need to change and bind to d:DesignWidth and my ColumnDefinition Width. How and where do I implement those changes? Based on my knowledge of MVVM the View (in this case my UserControl) is controlled by a ViewModel for said UserControl. Is it nessesary to implement one or is it possible to bind directly to both properties? I know I can name my ColumnDefinition with x:Name="MyColumnDefinition" but is the same possible for the actual UserControl Width?
mc:Ignorable="d"
d:DesignHeight="60" d:DesignWidth="170">
I have an ObservableCollection filled with two different UserControls and I want the Controls not to overlap when I display them. I use a ListBox element to display the ObservableCollection and implement the different UserControls over DataTemplates with a DataTemplateSelector. This works fine now but I'm worried if I dynamically change the Control Width that it will just overlap the next Control in the list. How do I ensure this won't happen?
Below is the code I have for now for the UserControl:
<Border Background="LightGray" CornerRadius="6">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="20"/>
<RowDefinition Height="20"/>
<RowDefinition Height="20"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="50"/>
<ColumnDefinition Width="70"/>
<ColumnDefinition Width="50"/>
</Grid.ColumnDefinitions>
<Button VerticalAlignment="Top" HorizontalAlignment="Right" Grid.Column="2" Grid.Row="0"
BorderThickness="0" Style="{StaticResource {x:Static ToolBar.ButtonStyleKey}}"
Command="{Binding RelativeSource={RelativeSource AncestorType=UserControl}, Path=DeleteCommand}"
CommandParameter="{Binding RelativeSource={RelativeSource AncestorType=UserControl}, Path=DeleteCommandParameter}">
<Rectangle Width="8" Height="8" Fill="White">
<Rectangle.OpacityMask>
<VisualBrush Visual="{StaticResource appbar_close}" Stretch="Fill" />
</Rectangle.OpacityMask>
</Rectangle>
</Button>
<TextBlock Grid.Column="1" Grid.Row="0" FontSize="12" Margin="0,4,0,18" Foreground="White" HorizontalAlignment="Center" Grid.RowSpan="2">Delay</TextBlock>
<TextBox Grid.Column="1" Grid.Row="1" Width="46" Margin="0,4,0,16" HorizontalAlignment="Center" Grid.RowSpan="2"
Text="{Binding RelativeSource={RelativeSource AncestorType=UserControl}, Path=Delay.MiddlePosition, UpdateSourceTrigger=PropertyChanged}"></TextBox>
<TextBlock Grid.Column="1" Grid.Row="2" FontSize="8" Margin="20,5,20,5" Foreground="Gray" HorizontalAlignment="Center">[s]</TextBlock>
</Grid>
</Border>
Edit:
ListBox-XAML to hold the other UserControls (I'm trying to build an Axis which can be filled with custom Positioning- and DelayControls:
<ListBox Name="Test" SelectionMode="Single" Grid.Column="1"
ItemsSource="{Binding RelativeSource={RelativeSource AncestorType=UserControl}, Path=BlockList}"
ItemTemplateSelector="{StaticResource BlockTemplateSelector}">
<ListBox.ItemContainerStyle>
<Style TargetType="{x:Type ListBoxItem}">
<Setter Property="Focusable" Value="False"/>
</Style>
</ListBox.ItemContainerStyle>
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<VirtualizingStackPanel IsItemsHost="True" Orientation="Horizontal"/>
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
</ListBox>
End result should look kind of like this, but with differently sized Positioning and Delay blocks:
Check this code will help you to set width of one control to other control.
<Border>
<Grid x:Name="grv">
<TextBox Width="{Binding ElementName=grv,
Path=ActualWidth}">
</TextBox>
</Grid>
</Border>
I struggeled quite a while to figure out how to address your issue and even though I am not completely happy with the outcome, I managed to solve it.
First I create a ListBox with a DummyList, which contains Model-Objects called 'UserControlModel' with a singe Property 'modelWidth', from which I create my UserControls with their default size.
<ListBox ItemsSource="{Binding SimpleList, UpdateSourceTrigger=PropertyChanged}" Grid.Row="1" Width="Auto" Height="200">
<ListBox.ItemTemplate>
<DataTemplate>
<osv:UserControl1 Width="{Binding modelWidth}" OnTextValidated="UserControlSizeChangeEvent"/>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
OnTextValidated is a RoutedEvent to hand up the KeyDown-Event from my Textbox to my Window(which i will show later)
The UserControl1.xaml then adds the textbox
<TextBox Width="60" Height="30" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" KeyDown="TextBox_KeyDown" Text="{Binding myText, UpdateSourceTrigger=PropertyChanged, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}}"></TextBox>
with a KeyDown event and a textbinding.
private void TextBox_KeyDown(object sender, KeyEventArgs e)
{
if (e.Key == Key.Return)//press enter to change
{
if (double.TryParse(myText, out double d) == true)
{
if (d >= 50) //minimum width, so i won't set it to 0 by accident
{
myWidth = d; //set the new Width
OnTextValidated(this, new RoutedEventArgs()); //tell window to resize the UserControl
}
}
}
}
Once I validated the new size is neither wrong nor too small i call a RoutedEventHandler
private RoutedEventHandler m_OnTextValidated;
/// <summary>
///
/// </summary>
public RoutedEventHandler OnTextValidated
{
get { return m_OnTextValidated; }
set
{
m_OnTextValidated = value;
OnPropertyChanged("CustomClick");
}
}
now i can bind on this like shown above.
next i have to do is passing down my event from the xaml.cs to the MinWindowViewModel
//Variables
private MainWindowViewModel m_DataContext;
//Constructor
DataContext = new MainWindowViewModel ();
m_DataContext = (MainWindowViewModel)this.DataContext;
private void UserControlSizeChangeEvent(object sender, RoutedEventArgs e)
{
if (m_DataContext != null)
{
m_DataContext.UserControlSizeChangeEvent(sender, e);
}
}
and finally update the size of my object in my code behind
public void UserControlSizeChangeEvent(object sender, RoutedEventArgs e)
{
UserControl1 uc = sender as UserControl1;
uc.Width = uc.myWidth;
}
Note: Although this works quite fine i'd be much happier if i found a way to change the width of the model instead of the object, so they would still have the same width in case the list is redrawn.
I also didn't use a MVVM pattern for my UserContrl, so you'll have to pass the event from your xaml.cs to your viewmodel first like I did for the MainWindow
I've got an ItemsControl which displays objects from a list from my viewmodel. I also have code to display a Popup when the user click on an item in the ItemsControl. However I don't know how to get the actual object from the clicked item to read its properties and display them in the Popup.
I've got a Click event handler for the Button (which is used to display my items in the ItemsControl) and I tried to see in the debugger if the button contains the desired object but apparently it doesn't.
How else can I get the object and populate the popup with its properties?
<ItemsControl ItemsSource="{Binding RecipientsNames}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal"/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<Button x:Name="btnConvoContact" Click="BtnConvoContact_Click"
Background="White" Foreground="Black" Cursor="Hand"
Width="Auto" Height="14" Padding="0" BorderThickness="0" Margin="0 0 6 0" HorizontalAlignment="Left" VerticalAlignment="Top">
<TextBlock Text="{Binding Path=Name}" FontSize="12" Margin="0 -2 0 -2"/>
</Button>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
Cast the DataContext of the sender argument in the event handler to your data type:
private void BtnConvoContact_Click(object sender, RoutedEventArgs e)
{
Button btn = sender as Button;
var dataObject = btn.DataContext as YourDataClass;
}
I have a Silverlight 5 project with a Styles.xaml and another class where I create a DataGrid at runtime. I want to have buttons in the DataGridColumnHeader to realize some kind of filter function. The style is defined as the following:
<Style x:Key="DataGridFilterStyle" TargetType="sdk:DataGridColumnHeader">
<Setter Property="ContentTemplate">
<Setter.Value>
<DataTemplate>
<Grid Height="{TemplateBinding Height}" Width="Auto">
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<StackPanel Orientation="Horizontal" Margin="2" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
<TextBlock Text="{Binding}" HorizontalAlignment="Center" VerticalAlignment="Center" Margin="0.2"/>
<Button Content="Foo" Margin="5,0" x:Name="filter" />
</StackPanel>
</Grid>
</DataTemplate>
</Setter.Value>
</Setter>
</Style>
Then, I generate a DataGrid at runtime. I do not know the parent page because it's generic:
dg = New DataGrid
dg.AutoGenerateColumns = False
dg.RowHeight = 28
' Doing some stuff here....
dg.ColumnHeaderStyle = Application.Current.Resources("DataGridFilterStyle")
gd.Children.Add(dg) ' gd is a Grid as a parent container
So, I have my Styles.xaml and a separate class where I do some events. How can I add a click event to the buttons in my DataGridColumnHeader (filter)? Normally, it wouldn't be a problem if the style and the code are in the same file.
Thanks for any help!
Regards
Daniel
<StackPanel Orientation="Horizontal" Margin="2" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
<TextBlock Text="{Binding}" HorizontalAlignment="Center" VerticalAlignment="Center" Margin="0.2"/>
<Button Content="Foo" Margin="5,0" x:Name="filter" Click="filter_Click" /> //xaml
</StackPanel>
private void filter_Click(object sender, RoutedEventArgs e) //code behind
{
}
I hope this will help
You could get the button control in code behind itself where you are setting the datagrid headerstyle. You need to first remove the TemplateBinding Height="{TemplateBinding Height}"
The below is the code to get the button control in code behind.
var style = Application.Current.Resources["DataGridFilterStyle"] as Style;
dataGrid1.ColumnHeaderStyle = style;
style = dataGrid1.ColumnHeaderStyle;
var setter = style.Setters.FirstOrDefault();
var k = setter as Setter;
var val = k.Value as DataTemplate;
var obj = val.LoadContent() as Grid;
var button = (obj.Children[0] as StackPanel).Children[1];
Hope this could solve your problem.
Cheers!
Vinod
I have two ListBoxes, one inside another. And both ListBoxes will have items dynamically added into them upon user request.
Each time a button (not shown in the below code snippet) is clicked, a new item is added to the listbox. Each new item includes a new listbox and others.
And I have buttons inside the inner listbox, one for each list item of the inner listbox.
With DataContext, I can find the data binded to the inner list item, and make changes to it, so that changes are reflected on the proper list item.
However, I also need to make changes to the data binded to the outer list item, which corresponds to the button. How can I know which one it is?
I have came up with a solution, which I believe it not elegant enough. By making changes to the model, I can have each inner data holds a reference to the outer data, so that I can find the data binded to the outer list item. This doesn't seem like a proper solution though. Do you have any suggestions?
Below is code snippet of the xaml. I've simplified it, hope it's easy to understand. I feel you don't have to read the whole code.
<ListBox Name="QuestionsListBox" HorizontalAlignment="Stretch" ItemContainerStyle="{StaticResource ListItem}" >
<ListBox.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<TextBox Text="{Binding Question, Mode=TwoWay}" Grid.Row="0" HorizontalAlignment="Stretch" TextWrapping="Wrap"/>
<ListBox Name="ChoicesListBox" ItemsSource="{Binding Choices}" Grid.Row="1" HorizontalAlignment="Stretch" ItemContainerStyle="{StaticResource ListItem}">
<ListBox.ItemTemplate>
<DataTemplate>
<Grid HorizontalAlignment="Stretch">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Button Grid.Column="0" Click="ChoiceAddButton_Click" Height="72" Width="72" HorizontalAlignment="Left" BorderBrush="Transparent">
<Button.Background>
<ImageBrush ImageSource="/Images/choices.add.png" Stretch="Fill" />
</Button.Background>
</Button>
<TextBox Text="{Binding Value, Mode=TwoWay}" HorizontalAlignment="Stretch" Grid.Column="1" Margin="-20,0" />
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
Why not just use QuestionsListBox.DataContext inside ChoiceAddButton_Click directly? You have a direct way to reference the outer ListBox from your code behind since you've given it a name, and DataContext is an accessible property.
private void ChoiceAddButton_Click(object sender, RoutedEventArgs e)
{
...
var outerLBDataContext= QuestionsListBox.DataContext;
...
}
This works fine for me in a demo solution using your provided XAML.
Edit 2:
Sorry, wasn't thinking. The Button's DataContext will be a Choice, not the Choices collection.
Your inner ListBox's DataContext is not a Question, it's Choices. Your outer TextBox has Question.Question as its DataContext. Binding Text or ItemsSource makes the DataContext point to the binding target. Here is a bit of tricky XAML to sneak in a DataContext reference.
Add an ElementName to your outer TextBox:
<TextBox Text="{Binding Question, Mode=TwoWay}" Grid.Row="0" HorizontalAlignment="Stretch" TextWrapping="Wrap" ElementName="questionTextBox"/>
Now, add a hidden TextBlock inside your inner ListBox:
<ListBox Name="ChoicesListBox" ItemsSource="{Binding Choices}" Grid.Row="1" HorizontalAlignment="Stretch" ItemContainerStyle="{StaticResource ListItem}">
<ListBox.ItemTemplate>
<DataTemplate>
<Grid HorizontalAlignment="Stretch">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Button Grid.Column="0" Click="ChoiceAddButton_Click" Height="72" Width="72" HorizontalAlignment="Left" BorderBrush="Transparent">
<Button.Background>
<ImageBrush ImageSource="/Images/choices.add.png" Stretch="Fill" />
</Button.Background>
</Button>
<TextBox Text="{Binding Value, Mode=TwoWay}" HorizontalAlignment="Stretch" Grid.Column="1" Margin="-20,0" />
<TextBlock Name="hiddenTextBlock" Visibility="Collapsed" DataContext="{Binding ElementName=questionTextBox, Path=DataContext}"
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
Finally, inside your event handler, you can navigate around the tree to get that reference:
private void ChoiceAddButton_Click(object sender, RoutedEventArgs e)
{
Button btn = sender as Button;
if(btn == null) return; //won't happen when this method handles the event
Grid g = btn.Parent as Grid;
if(g!=null) // also unlikely to fail
{
TextBlock tb = g.FindName("hiddenTextBlock") as TextBlock;
if(tb!=null) // also unlikely to fail, but never hurts to be cautious
{
var currentQuestion = tb.DataContext;
// now you've got the DC you want
}
}
}
I'd like to note that this isn't really an elegant solution. It is an all UI solution, however, which could be a useful thing. But better design would be to include Parent references in your Choice and ChoiceList (or whatever they're called) classes and use that. Then it would be as simple as calling btn.DataContext.Parent.Parent with appropriate type conversions. This way your code becomes easier to read and maintain.
You could add an event to your inner model that your containing datamodel subscribes to before adding it to the 'Choices' collection and pass the relevant information that way.
Is this necessary to use the Button control in your solution ??
If not fixed, then you can use the "Image control" as specified below <Image Source="/Images/choices.add.png" Height="72" Width="72" HorizontalAlignment="Left" Stretch="Fill"/>
If you use the Image control then in combination with this you can add the selection changed event to inner list box ( ChoicesListBox). Then in the Handler you can get the item selected as it comes as parameter with the selection changed event(SelectionChangedEventArgs).
Modify the List box and add the Selection changed event handler as below
<ListBox Name="ChoicesListBox" ItemsSource="{Binding Choices}" Grid.Row="1" HorizontalAlignment="Stretch" ItemContainerStyle="{StaticResource ListItem}" SelectionChanged="Items_SelectionChanged">
in page.xaml.cs you can add the handler and access the item as follows
private void Items_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (e.AddedItems[0] != null)
{
//Please use the casting to the Choices items type to make use.
var temp = (ChoicesItemViewModel)e.AddedItems[0];
}
}
I've been needing to use a numeric up-down control for my WPF app. I read a similar question posted here and tried using the one available here > http://bot.codeplex.com/.
I added the references and referenced it in my XAML window
xmlns:lib="clr-namespace:PixelLab.Wpf;assembly=PixelLab.Wpf"
and did this.
<lib:NumericUpDown Name="year"></lib:NumericUpDown>
and keep getting the error: 'nud' is an undeclared namepsace.
I'm very new to WPF so any help would be appreciated.
The Extented WPF Toolkit has one: NumericUpDown
Just combine a TextBox with a veritical fixed-height ScrollBar like this:
<Grid Height="80">
<TextBox x:Name="part_TextBox" Text="{Binding Value,ElementName=part_Scrollbar,StringFormat={}{0:F6},Mode=TwoWay}" MaxLength="11" VerticalAlignment="Center" VerticalContentAlignment="Center" FontSize="24" Height="40"/>
<ScrollBar x:Name="part_Scrollbar" Orientation="Vertical" Minimum="0" Maximum="100" BorderBrush="{x:Null}" SmallChange="0.1" Height="32" Margin="8 4" VerticalAlignment="Stretch" Grid.Column="1" RenderTransformOrigin="0.5,0.5" HorizontalAlignment="Right">
<ScrollBar.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform Angle="180"/>
<TranslateTransform/>
</TransformGroup>
</ScrollBar.RenderTransform>
</ScrollBar>
</Grid>
Bindings for Maximum & Minimum & SmallChange/Increment are directly avaliable.
Vanilla XAML (no additions or packages) implementation:
<Window x:Class="Spinner.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:Spinner"
mc:Ignorable="d"
ResizeMode="CanMinimize" SizeToContent="WidthAndHeight" Title="Scroll Spinner">
<Grid>
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
<!-- The button exists just to have something other than the spinner be the object of focus. -->
<Button Content="Reset" TabIndex="0"/>
<!-- The spinner is just a scroll bar overlaying a text box (same tab indices). -->
<!-- Only the scroll bar is named (in order to get its value); the text box just relfects the scroll bar's value. -->
<TextBox GotFocus="TextBox_GotFocus" Grid.Row="1" Height="{Binding ElementName=SpinnerScr, Path=ActualHeight}" HorizontalAlignment="Stretch" IsReadOnly="True" TabIndex="1" Text="{Binding ElementName=SpinnerScr, Path=Value, StringFormat={}{0:####0}}" TextAlignment="Center"/>
<ScrollBar x:Name="SpinnerScr" Background="Transparent" Focusable="True" Grid.Row="1" Height="20" LostFocus="SpinnerScr_LostFocus" Margin="0,3" Maximum="999" Orientation="Horizontal" SmallChange="1" TabIndex="1" Visibility="Hidden"/>
<x:Code>
<![CDATA[
void SpinnerScr_LostFocus(object sender, RoutedEventArgs e) {
SpinnerScr.Visibility = Visibility.Hidden;
}
void TextBox_GotFocus(object sender, RoutedEventArgs e) {
SpinnerScr.Visibility = Visibility.Visible;
SpinnerScr.Focus();
}
]]>
</x:Code>
</Grid>
</Window>
using System.Windows;
namespace Spinner {
public partial class MainWindow : System.Windows.Window {
public MainWindow() {
InitializeComponent();
}
}
}
When the scroll bar (or text box) has focus, the scroll elements are visible. On loss of focus, only the text box is visible. Only the scroll bar may be accessed in any code-behind.