WPF - How to give priority to the second element of DockPanel - c#

If have a DockPanel with two Border elements, first with HorizontalAlignment="Left" and second with HorizontalAlignment="Right". The width of entire DockPanel is fixed but widthes of Borders should be changed depending to its content. Both borders have TextBlockss. First TextBlock has word wrapping turned on the second is just one word. I want at first the second Border to be drawan and it should take all needed space and remaining space will be occupied by the first Border and it should use word wrapping to draw the content. This is my code which does not work because it first draws the first Border so no padding is left for the second one. Can you hint how to give priority to the second(right) element of DockPanel?
<DockPanel>
<Border Background="#FFFFFF" HorizontalAlignment="Left" CornerRadius="4 0 0 4" Height="48" MaxWidth="183">
<ContentControl VerticalAlignment="Center">
<ContentControl.Style>
<Style TargetType="ContentControl">
<Style.Triggers>
<DataTrigger Binding="{Binding Mode}" Value="trial">
<Setter Property="Content">
<Setter.Value>
<WrapPanel Orientation="Horizontal" MaxWidth="190" VerticalAlignment="Center" HorizontalAlignment="Center">
<TextBlock FontSize="12" TextWrapping="Wrap" Padding="11, 0, 11, 0">
<Run Text="{Binding TrialText1, Mode=OneWay}"/>
</TextBlock>
</WrapPanel>
</Setter.Value>
</Setter>
</DataTrigger>
</Style.Triggers>
</Style>
</ContentControl.Style>
</ContentControl>
</Border>
<Border CornerRadius="0 4 4 0" HorizontalAlignment="Right" MaxWidth="104" MinWidth="83">
<Border.Background>
<SolidColorBrush Color="#FFFFFF" Opacity="0.4"/>
</Border.Background>
<ContentControl VerticalAlignment="Center">
<ContentControl.Style>
<Style TargetType="ContentControl">
<Style.Triggers>
<DataTrigger Binding="{Binding Mode}" Value="trial">
<Setter Property="Content">
<Setter.Value>
<WrapPanel Orientation="Vertical" VerticalAlignment="Center" HorizontalAlignment="Center">
<TextBlock Text="{Binding PlanTitleText1}" FontSize="12" HorizontalAlignment="Center"
</WrapPanel>
</Setter.Value>
</Setter>
</DataTrigger>
</Style.Triggers>
</Style>
</ContentControl.Style>
</ContentControl>
</Border>
</DockPanel>

You can use Grid instead. Define 2 Columns. Make the second one auto adjust how much space it needs and allow the first one to take all the remaining space.
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="auto"/>
</Grid.ColumnDefinitions>
<Border Grid.Column="0" (...)>
(...)
</Border>
<Border Grid.Column="1" (...)>
(...)
</Border>
</Grid>

Related

Propagate ListBoxItem IsSelected trigger to child control

I'm developing a CheckedListBox with self removable ListBoxItems. The problem is that an item only gets checked if the user clicks on the CheckBox area, which is kind of awkward.
How do I create ListBoxItem triggers (IsSelected) to check the checkboxes on a "DataSourced" ListBox? Eg:
Below is my control (all other code have been omitted for brevity):
<ListBox x:Name="executors" ItemsSource="{Binding Executors}" HorizontalAlignment="Left" Height="121" Margin="23,19,0,0" VerticalAlignment="Top" Width="362">
<ListBox.ItemContainerStyle>
<Style TargetType="ListBoxItem">
<Setter Property="Height" Value="30" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ListBoxItem">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition Width="30" />
</Grid.ColumnDefinitions>
<CheckBox Margin="4,8" IsChecked="{Binding Enabled}">
<ContentPresenter Content="{Binding Description}">
</ContentPresenter>
</CheckBox>
<Button Command="{Binding DataContext.RemoveExecutorCommand, ElementName=executors}" CommandParameter="{Binding}" Background="White" Height="22" Width="22" Grid.Column="1">
<Image Source="trash.png" Stretch="Fill" Width="14" Height="14" />
</Button>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ListBox.ItemContainerStyle>
</ListBox>
Executors is a ObservableCollection of Executor which has Enabled and Description as members.
For further reference for those who come across this same question, here's a working snippet I have done. I couldn't find any working sample anywhere, so this might be of much use.
The main idea here was to either propagate the selection event to the CheckBoxes, which sounds too much of a work, or to simple extend the CheckBox selection area to fit the ListBoxItem.
Below is a sample on how to achieve the second option:
<ListBox x:Name="executors" ItemsSource="{Binding Executors}" HorizontalAlignment="Left" Height="121" Margin="23,19,0,0" VerticalAlignment="Top" Width="362" ScrollViewer.VerticalScrollBarVisibility="Visible">
<ListBox.ItemContainerStyle>
<Style TargetType="ListBoxItem">
<Setter Property="Height" Value="30"/>
<Setter Property="VerticalContentAlignment" Value="Stretch"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ListBoxItem">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="9*"/>
<ColumnDefinition Width="1*" />
</Grid.ColumnDefinitions>
<CheckBox Content="{Binding Description}" IsChecked="{Binding Enabled}" VerticalContentAlignment="Center" Margin="4,0"/>
<Button Command="{Binding DataContext.RemoveExecutorCommand, ElementName=executors}" CommandParameter="{Binding}" Width="21" Height="21" Background="White" Grid.Column="1">
<Image Source="trash.png" Stretch="Fill" Width="14" Height="14" />
</Button>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ListBox.ItemContainerStyle>
</ListBox>
This should produce the following:

Binding within a template

I have the following ControlTemplate, as shown below, and I would like to avoid hard coding the hight and width of the image, instead I would like to bind the Height and width of the Image control
<Image Source="/Rotate.Pictures;component/Images/error.png"
Stretch="Uniform"
HorizontalAlignment="Stretch"
VerticalAlignment="Stretch"
Height="14"
Width="14"/>
to the TextBlock's Text (TextBlock named "ErrorText") property path = "Height". Both Height and Width of the image should be bound to the Height value of the TextBlock's Text Height property
Does anyone know how I can accomplish this?
Template:
<Grid IsSharedSizeScope="True">
<Grid.Resources>
<Style TargetType="{x:Type TextBox}">
<Setter Property="Validation.ErrorTemplate">
<Setter.Value>
<ControlTemplate>
<StackPanel>
<AdornedElementPlaceholder>
<Border BorderBrush="Red" BorderThickness="2"/>
</AdornedElementPlaceholder>
<ItemsControl ItemsSource="{Binding}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<Image Source="/Rotate.Pictures;component/Images/error.png" Stretch="Uniform" HorizontalAlignment="Stretch"
VerticalAlignment="Stretch"
Height="14"
Width="14"/>
<TextBlock x:Name="ErrorText" Text="{Binding ErrorContent}" Foreground="Red"/>
</StackPanel>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</StackPanel>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Grid.Resources>
Key to the answer is to reference past controls (control that the thread of execution already encountered in the "{Binding ElementName=ErrorText, Path=ActualHeight}"). So the solution uses a grid, then specify Grid.Column 1 before specifying Grid.Column 0 that references the ElementName in Grid.Column 1.
<Style TargetType="{x:Type TextBox}">
<Setter Property="Validation.ErrorTemplate">
<Setter.Value>
<ControlTemplate>
<StackPanel>
<AdornedElementPlaceholder>
<Border BorderBrush="Red" BorderThickness="2"/>
</AdornedElementPlaceholder>
<ItemsControl ItemsSource="{Binding}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<TextBlock x:Name="ErrorText" Grid.Column="1" Text="{Binding ErrorContent}" Foreground="Red"/>
<Image Grid.Column="0" Source="/Rotate.Pictures;component/Images/error.png"
Height="{Binding ElementName=ErrorText, Path=ActualHeight}"
Width="{Binding ElementName=ErrorText, Path=ActualHeight}"/>
</Grid>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</StackPanel>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>

DataBinding ListView creating components if a certain condition is met

I am working on a C# WPF project and I have a list view which uses data binding and a collection view.
Below is how my ListView is currently populated.
<ListView HorizontalAlignment="Left" Margin="547,12,0,41" Name="lstCallLogInformation" Width="320">
<ListView.Style>
<Style TargetType="ListView">
<Style.Triggers>
<Trigger Property="HasItems" Value="False">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ListView">
<TextBlock Text="No items in your devices call log" FontWeight="Bold" HorizontalAlignment="Center" />
</ControlTemplate>
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
</ListView.Style>
<ListView.GroupStyle>
<GroupStyle>
<GroupStyle.ContainerStyle>
<Style TargetType="{x:Type GroupItem}">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<Expander IsExpanded="True">
<Expander.Header>
<StackPanel Orientation="Horizontal">
<TextBlock FontWeight="Bold" Foreground="Gray" Text="{Binding Name}" VerticalAlignment="Bottom" />
</StackPanel>
</Expander.Header>
<ItemsPresenter />
</Expander>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</GroupStyle.ContainerStyle>
</GroupStyle>
</ListView.GroupStyle>
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="Control.HorizontalContentAlignment" Value="Stretch" />
</Style>
</ListView.ItemContainerStyle>
<ListView.ItemTemplate>
<DataTemplate>
<DockPanel Style="{StaticResource onmouseover}">
<StackPanel HorizontalAlignment="Stretch" Orientation="Horizontal" Tag="{Binding logID}">
<Image Height="30" Source="{Binding base64ImageString, Converter={StaticResource ImageConverter}}" Width="30" />
<StackPanel Margin="10" Orientation="Vertical">
<TextBlock FontWeight="Bold" Text="{Binding contactNameOrPhoneNumber}" />
<StackPanel HorizontalAlignment="Stretch" Orientation="Horizontal">
<TextBlock HorizontalAlignment="Left" Text="{Binding dateString}" />
<TextBlock Margin="15, 0, 0, 0" Text="Duration: " />
<TextBlock HorizontalAlignment="Right" Text="{Binding humanReadableCallDuration}" />
</StackPanel>
</StackPanel>
<StackPanel Orientation="Vertical">
<Button Background="Transparent" BorderThickness="0" BorderBrush="Transparent" Tag="{Binding logID}" Name="btnAddAsContact" Click="btnAddAsContact_Click">
<Image Width="15" Height="15" Source="/BoardiesSMSServer;component/images/add.png" Tag="{Binding logID}" />
</Button>
<Button Background="Transparent" BorderThickness="0" BorderBrush="Transparent" Tag="{Binding logID}" Name="btnDeleteContactFromLog" Click="btnDeleteContactFromLog_Click">
<Image Width="15" Height="15" Source="/BoardiesSMSServer;component/images/delete.png" Margin="0,0,0,5" Tag="{Binding logID}" />
</Button>
</StackPanel>
</StackPanel>
</DockPanel>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
Within my DockPanel within the DataTemplate I have a StackPanel which contains various TextBlocks from the array that is passed into the binding.
In one of the StackPanels you will see you will see a TextBlock that binds to the element of contactNameOrPhoneNumber.
What I want to be able to do is if another value from the binding is null then I add a TextBlock for the contactNameOrPhoneNumber` element and alongside it have another TextBlock which contains another element of number``, if the other binding value is not null then this extra textblock of number is not added.
So in simple terms, what I want to be able to do is within the DataTemplate have a conditional if statement of if binding value == null add textblock to stackpanel else don't add textblock.
You can do that with Style + Triggers something like this:
<TextBlock>
<TextBlock.Style>
<Style TargetType="TextBlock">
<Style.Triggers>
<DataTrigger Binding="{Binding PropertyName}" Value="{x:Null}">
<Setter Property="Visibility" Value="Collapsed"/>
</DataTrigger>
</Style.Triggers>
</Style>
</TextBlock.Style>
</TextBlock>
Also you can create IValueConverter say ObjectToVisibilityConverter which will take input your property and if property is null return Visibility.Collapsed else return Visibility.Visible.
You can then bind property with Visibility value of TextBlock via Converter.
<TextBlock Visibility="{Binding PropertyName,
Converter={StaticResource ObjectToVisibilityConverter}}"/>

Shapes don't appear to be reacting to setting ZIndex?

Currently, I have three different types of objects that I draw to the screen (I'm using a ZoomableCanvas, if that makes a difference): beacons (concentric blue circles), tables (black rectangles), and debugRectangles (gold rectangles. The objects are displayed/layered on the Z-axis according to the order in which they're added to the ItemSource, but it's not always possible for me to add shapes in Z-ordering.
This image shows how it looks, depending on the order of objects being added. I'd like for the shapes to respect the Panel.ZIndexes I've set, and in doing so, look like the top image (except with the gold rectangle in the back).
<Style.Triggers>
<!-- Gold rectangles drawn here (color set in code) -->
<DataTrigger Binding="{Binding type}" Value="rectangle">
<Setter Property="ContentTemplate">
<Setter.Value>
<DataTemplate>
<Grid>
<Rectangle Fill="{Binding fill}" Stroke="{Binding border}" StrokeThickness="5"
Width="{Binding width}" Height="{Binding height}" Panel.ZIndex="-1"/>
<TextBlock Text="{Binding i}" HorizontalAlignment="Center" VerticalAlignment="Center"/>
</Grid>
</DataTemplate>
</Setter.Value>
</Setter>
</DataTrigger>
<!-- Black rectangles drawn here -->
<DataTrigger Binding="{Binding type}" Value="tableBlock">
<Setter Property="ContentTemplate">
<Setter.Value>
<DataTemplate>
<Grid>
<Rectangle Fill="{Binding fill}" Stroke="Black" StrokeThickness="5"
Width="{Binding width}" Height="{Binding height}" Panel.ZIndex="50"/>
<TextBlock Text="{Binding i}" HorizontalAlignment="Center" VerticalAlignment="Center"/>
</Grid>
</DataTemplate>
</Setter.Value>
</Setter>
</DataTrigger>
<!-- Blue circles drawn here -->
<DataTrigger Binding="{Binding type}" Value="beacon">
<Setter Property="ContentTemplate">
<Setter.Value>
<DataTemplate>
<Grid>
<Ellipse Fill="DodgerBlue" Width="{Binding outerRadius}" Height="{Binding outerRadius}" Panel.ZIndex="97"/>
<Ellipse Fill="SkyBlue" Width="{Binding innerRadius}" Height="{Binding innerRadius}" Panel.ZIndex="98"/>
<TextBlock Text="{Binding id}" HorizontalAlignment="Center" VerticalAlignment="Center" Panel.ZIndex="99"/>
</Grid>
</DataTemplate>
</Setter.Value>
</Setter>
</DataTrigger>
</Style.Triggers>
Within a template, they follow the order (I can rearrange the components of a beacon), but relative to each other, no dice. Can anyone identify the issue?
ZoomableCanvas relies upon Panel to render, which means it uses the standard ordering for ZIndex.
<Window x:Class="ZoomableApplication2.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">
<DockPanel>
<ZoomableCanvas>
<Rectangle Fill="Green" Height="250" Width="250" />
<Rectangle Fill="Red" Height="200" Width="400" Panel.ZIndex="2" />
<Rectangle Fill="Blue" Height="400" Width="200" />
</ZoomableCanvas>
</DockPanel>
</Window>
The problem you are having is that your visual tree looks like this:
ZoomableCanvas
Grid
Ellipse with Panel.ZIndex="98"
Since Ellipse is a child of Grid, the ZOrder doesn't affect the ZoomableCanvas, but instead sets the ZIndex of the Ellipse relative to the other children of the grid. In order to change the layering of the ZoomableCanvas, you need to set the ZOrder property on the child of the ZoomableCanvas – the Grid:
ZoomableCanvas
Grid with Panel.ZIndex="98"
Ellipse
Example:
<DataTemplate>
<Grid Panel.ZIndex="100">
<Rectangle Fill="{Binding fill}" Stroke="Black" StrokeThickness="5"
Width="{Binding width}" Height="{Binding height}" Panel.ZIndex="50"/>
<TextBlock Text="{Binding i}" HorizontalAlignment="Center" VerticalAlignment="Center"/>
</Grid>
</DataTemplate>
If you are using a ListBox, you end up with additional levels in your tree:
ZoomableCanvas
ListBoxItem with ItemContainerStyle setting Panel.ZIndex="98"
Grid
Ellipse
Example of use:
<ListBox>
<ListBox.ItemContainerStyle>
<Style TargetType="{x:Type ListBoxItem}">
<Setter Property="Panel.ZIndex" Value="98" />
</Style>
</ListBox.ItemContainerStyle>
</ListBox>
If you have multiple varying ZIndexes, you could expose a property on the data item and bind to that, or use a ItemContainerStyleSelector to do the logic in code-behind.
You can also use Snoop to look at the created tree to identify these sorts of issues.
Have you tried setting the Panel.ZIndex on the Grids?

First TreeViewItem not being styled (MahApps Metro TreeView)

I'm using MahApps Metro Styling in WPF and trying to add a style to the TreeViewItem so that the nodes have a folder icon next to them. (http://mahapps.com/MahApps.Metro/)
This is fairly straight forward, all I have to do is override the TreeViewItem header template and add in the image.
The problem is that for some reason the new template is not applied to the first entry in the tree as you can see blow:
All other tree nodes work fine but the first one refuses to have the style applied.
I have confirmed that this is something to do with the MahApps TreeView styling contained in Controls.TreeView.xaml (a new project without MahApps but with the same custom style works as expected) but I cannot see exactly what is going on.
Does anyone have any experience styling TreeViewItems when using MahApps?
<TreeView Grid.Column="0" Name="FolderView">
<TreeView.Resources>
<Style TargetType="{x:Type TreeViewItem}" BasedOn="{StaticResource MetroTreeViewItem}">
<Setter Property="HeaderTemplate">
<Setter.Value>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<Image Name="img"
Width="16"
Height="16"
Stretch="Fill"
Source="Images/Folder.png"
Margin="3"
VerticalAlignment="Center"
/>
<TextBlock Text="{Binding}" Margin="0,0" VerticalAlignment="Center" />
</StackPanel>
</DataTemplate>
</Setter.Value>
</Setter>
</Style>
</TreeView.Resources>
</TreeView>
try this`
<TreeView Grid.Column="0" Name="FolderView">
<TreeView.Resources>
<Style TargetType="{x:Type TreeViewItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TreeViewItem">
<Grid Background="Transparent">
<Grid.ColumnDefinitions>
<ColumnDefinition MinWidth="25" Width="Auto" />
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition/>
</Grid.RowDefinitions>
<ToggleButton x:Name="Expander" IsChecked="{Binding Path=IsExpanded,RelativeSource={RelativeSource TemplatedParent}}" ClickMode="Press">
<ToggleButton.Style>
<Style TargetType="ToggleButton">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ToggleButton">
<Border Height="0" Width="0"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ToggleButton.Style>
</ToggleButton>
<ContentPresenter x:Name="PART_Header" ContentSource="Header"/>
<Grid x:Name="ItemsHost" Grid.Row="1" Grid.Column="1" Grid.ColumnSpan="2" Margin="0,-5,0,0">
<ItemsPresenter />
</Grid>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsExpanded" Value="false">
<Setter TargetName="ItemsHost" Property="Visibility" Value="Collapsed"/>
</Trigger>
<Trigger Property="HasItems" Value="false">
<Setter TargetName="Expander" Property="Visibility" Value="Hidden"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
<Setter Property="HeaderTemplate">
<Setter.Value>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<Image Name="img" Width="16" Height="16" Stretch="Fill" Source="Images/Folder.png" Margin="3" VerticalAlignment="Center"/>
<TextBlock Text="{Binding}" Margin="0,0" VerticalAlignment="Center" />
</StackPanel>
</DataTemplate>
</Setter.Value>
</Setter>
</Style>
</TreeView.Resources>
</TreeView>
I've found the solution :
You need to disable MahApps Metro style like this : Style="{x:Null}"
<TreeView Style="{x:Null}" Grid.Column="0" Grid.Row="1" >
<TreeView.Resources>
<Style TargetType="{x:Type TreeViewItem}">
<Setter Property="HeaderTemplate">
<Setter.Value>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<Image Width="20" Height="20" Stretch="Fill" Source="/Resources/folder.png" />
<TextBlock Text="{Binding}" />
</StackPanel>
</DataTemplate>
</Setter.Value>
</Setter>
</Style>
</TreeView.Resources>
</TreeView>

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