WPF Expander in Xaml? - wpf

I want to make an ItemsControl that provides some of its own children, and then when used can add additional children, similarly to the built in Expander class.
However, in this example, the Header TextBlock is also removed. This is a rephrasing of
a question I asked yesterday.
LayerPanelItem.xaml:
<ItemsControl x:Class="Controls.LayerPanelItem"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<StackPanel>
<TextBlock>Header</TextBlock>
<StackPanel Name="InnerContent">
<!-- Test 1 and Test 2 should go here. -->
</StackPanel>
</StackPanel>
</ItemsControl>
Main.xaml:
<controls:LayerPanelItem>
<TextBlock>Test 1</TextBlock>
<TextBlock>Test 2</TextBlock>
</controls:LayerPanelItem>

If I'm understanding you correctly, you want more of a HeaderedItemsControl. Expander derives from HeaderedContentControl and this adds in the ItemsControl behavior to that:
<HeaderedItemsControl x:Class="WpfApplication1.LayerPanelItem"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<HeaderedItemsControl.Template>
<ControlTemplate TargetType="{x:Type HeaderedItemsControl}">
<StackPanel>
<ContentPresenter ContentSource="Header"/>
<ItemsPresenter/>
</StackPanel>
</ControlTemplate>
</HeaderedItemsControl.Template>
<HeaderedItemsControl.Header>
<StackPanel>
<TextBlock>Header</TextBlock>
<TextBlock>Other stuff...</TextBlock>
</StackPanel>
</HeaderedItemsControl.Header>
</HeaderedItemsControl>

Related

How To Make A WPF UserControl Act As A Container

I'm trying to create a Toolbar control that can group selected buttons with a border and a label. If there is already a built-in control that will do this then I could use that instead of building a UserControl.
If not, then what I'm wanting to build is a UserControl that would allow me to enter one-to-many of my ImageButton UserControls and set a GroupLabel text like below. Can this be done in WPF?
<User_Controls:ToolbarGroup GroupLabel="Entity">
<User_Controls:ImageButton ButtonText="Entity Setup"/>
<User_Controls:ImageButton ButtonText="New Entity"/>
</User_Controls:ToolbarGroup>
PS: I would post an image but this quirky forum won't allow me to post an image.
If i have got you correctly then I think you can achieve this way also, and on mouse eneter and leave event you can do the button click job.
for setting text you can use a grid and a label inside it to set the text, and Image buttons below it.
<UserControl x:Class="ABC.View.Oats"
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"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300">
<Grid>
<Image Source="{Binding Image}" Stretch="Fill"/>
</Grid>
</UserControl>
I think what you're looking for is a GroupBox, it has a header property where you can set the label.
Something like this:
<GroupBox Width="300" Height="100">
<GroupBox.Header>
<Label>Text</Label>
</GroupBox.Header>
<StackPanel>
<Button Content="Button"/>
<Button Content="Button"/>
<Button Content="Button"/>
</StackPanel>
</GroupBox>
I would also recommend using the groupbox, it seems to be doing exactly what you want it to do and it looks neat. Here's some examples on how to use them: http://www.dotnetperls.com/groupbox-wpf
On the other hand, if you believe the groupbox is not sufficient, you could create a control that inherits from the groupbox and you could extend it and add whatever you need to it. It would look like this:
public class customGroupBox: GroupBox{
....Add whatever you need here
}
Thanks for the replies. I tried the GroupBox and it's not the layout we want because we want the label underneath the buttons and centered. I never could find a way to add a collection to the UserControl. Maybe I didn't ask the question right by calling it a container. The code below will work, but it's not elegant. I wanted something that would wrap the layout in a UserControl and allow me to add a variable number of buttons to each toolbar group.
<StackPanel Orientation="Horizontal" Grid.Row="0" Grid.Column="0">
<Border Background="GhostWhite" BorderBrush="Gainsboro" BorderThickness="1">
<StackPanel Orientation="Vertical">
<StackPanel Orientation="Horizontal">
<User_Controls:ImageButton ButtonText="New 1"/>
<User_Controls:ImageButton ButtonText="New 2"/>
<User_Controls:ImageButton ButtonText="New 3"/>
</StackPanel>
<Label HorizontalAlignment="Center" Content="Group 1"/>
</StackPanel>
</Border>
<Border Background="GhostWhite" BorderBrush="Gainsboro" BorderThickness="1">
<StackPanel Orientation="Vertical">
<StackPanel Orientation="Horizontal">
<User_Controls:ImageButton ButtonText="New 4"/>
</StackPanel>
<Label HorizontalAlignment="Center" Content="Group 2"/>
</StackPanel>
</Border>
</StackPanel>
One way to accomplish this is with a custom styled ItemsControl.
You can then reuse it and just bind it to different data.
Please forgive me, this is hand-typed...
In your resources...
<Style x:Key="ToolbarGroupItemsControlStyle" TargetType="ItemsControl">
...
<Setter Property="ItemsPanel">
<Setter.Value>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal"/>
</ItemsPanelTemplate>
</Setter.Value>
</Setter>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ItemsControl">
<Grid>
... XAML to form your group with a binding to the
... group name
<ItemsPresenter/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<DataTemplate x:Key="ToolbarGroupItemTemplate">
<Grid>
... XAML and binding for each toolbar group item ...
</Grid>
</DataTemplate>
In your XAML...
<ItemsControl
Style="{DynamicResource ToolbarGroupItemsControlStyle}"
ItemsSource="{Binding ToolbarGroupItems}"
ItemTemplate="{DynamicResource ToolbarGroupItemTemplate"/>
If your resources above are at the application level, then you can place the ItemsControl above on any Window/UserControl you want.
Your ItemsSource will need to be a collection of a custom type you create that has bindings for the button text, etc.
I hope this is helpful.

Presenting an ItemsControl

simple question!
I want to present an itemscontrol inside of an expander and grid which contains a textbox. I want to do this multiple times so I wrapped it in a ControlTemplate.
<ControlTemplate x:Key="ArrayPresenter">
<Expander Template="{StaticResource ArrayTemplate}">
<Grid>
<ContentPresenter/>
<TextBlock FontWeight="Bold" Text="Empty" Margin="3" HorizontalAlignment="Center" Foreground="#66C9C9C9" FontSize="15" Visibility="{quickConverter:Binding '$P.Count == 0 ? Visibility.Visible : Visibility.Collapsed', P={Binding Array}}" />
</Grid>
</Expander>
</ControlTemplate>
This is what I want to present. Unfortunately whenever an item is added to the itemscontrol, nothing happens and it doens't display the new items!
<ContentControl Template="{StaticResource ArrayPresenter}">
<ItemsControl Style="{StaticResource ArrayItemsStyle}" Margin="5" ItemTemplate="{StaticResource StructureFieldTemplate}"/>
</ContentControl>
As mentioned in the comment you need to target type of your ControlTemplate
<ControlTemplate ... TargetType="{x:Type ContentControl}">
Without that ControlTemplate targets System.Windows.Controls.Control type and that does not have Content to present so ContentPresenter does not know what to show.

WPF : dynamic view/content

I'm a bit beginner in WPF, so I ask this..
Let's say I have a window, and inside the window I want to have something like container, could be just border or maybe panel (in winform terms). The content of container is binded to the selected option (e.g:button). So, for instance, when user selects OPTION 1, the container shows chart; when user selects OPTION 2, the container shows listview filled with data; when user selects OPTION 3, the container shows another things, and so on.
What is the best/nicest (or easiest maybe) approach to do this? I'm thinking about using user control for the content of the container, but don't know if this is nice solution neither the performance for using user control to show little bit complex things and maybe some calculations. Any other idea guys?
To elaborate on #Sheridan's answer, here is a simple TabControl XAML that does what you need:
<TabControl TabStripPlacement="Left">
<TabItem Header="Option 1">
<Grid Background="DarkGray">
<TextBlock Foreground="AliceBlue" VerticalAlignment="Center" HorizontalAlignment="Center" FontSize="20" Text="View 1"/>
</Grid>
</TabItem>
<TabItem Header="Option 2">
<Grid Background="DarkBlue">
<TextBlock Foreground="AliceBlue" VerticalAlignment="Center" HorizontalAlignment="Center" FontSize="20" Text="View 2"/>
</Grid>
</TabItem>
<TabItem Header="Option 3">
<Grid Background="DarkSlateBlue">
<TextBlock Foreground="AliceBlue" VerticalAlignment="Center" HorizontalAlignment="Center" FontSize="20" Text="View 3"/>
</Grid>
</TabItem>
</TabControl>
Result:
You can customize it a little bit by adding this simple Style To your Window.Resources:
<Window.Resources>
<Style TargetType="TabItem">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TabItem">
<RadioButton Content="{TemplateBinding Header}" Margin="2"
IsChecked="{Binding IsSelected, RelativeSource={RelativeSource TemplatedParent}, Mode=TwoWay}"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Window.Resources>
Which then results in:
The "WPF Mentality" makes you think the UI controls in terms of their functionality, not their appearance, this is a TabControl =)
I solved this with a ContentControl
MainWindow:
(Define the views you wish to visualize as resources)
<Window.Resources>
<DataTemplate DataType="{x:Type viewModels:SystemPCViewModel}">
<controls:SystemPCControl/>
</DataTemplate>
<DataTemplate DataType="{x:Type viewModels:ChipPCViewModel}">
<controls:ChipPCControl/>
</DataTemplate>
</ResourceDictionary>
</Window.Resources>
<Grid>
<ContentControl Content="{Binding CurrentView}"/>
</Grid>
ViewModel: (can't get much simpler)
public ViewModelBase CurrentView
{
get { return currentView; }
set { Set(() => CurrentView, ref currentView, value); }
}
And there you go, you can change your views by setting the view model for the controls you defined in your MainWindow
private void OnCommandExecuted()
{
CurrentView = someViewModel;
}
private void OnAnotherCommandExecuted()
{
CurrentView = anotherViewModel;
}
HTH!
What you are describing sounds pretty close to a standard TabControl, but with a ControlTemplate that puts the tabs on the left side instead of above the content panel. Using this method would mean having a UserControl in each TabItem, eg. multiple controls. You can find out more about the TabControl from the TabControl Class page at MSDN.

WPF UserControl or ControlTemplate... (not sure)

I have a listbox where I have to add about 20 static custom items. All the items are based on the same template (something like that) :
<Border>
<StackPanel Orientation="Horizontal">
<Image Source="" Height="30" />
<TextBlock Text="" VerticalAlignment="Center" />
</StackPanel>
</Border>
I don't want to repeat that 20 times in the ListBox.Items I would like to have some kind of UserControl where I could do something Like the following where I could set some custom properties :
<ListBox>
<ListBox.Items>
<MyListBoxTemplate x:Name="Item1" ItemText="Item #1" ItemImageSource="/Image1.jpg" />
<MyListBoxTemplate x:Name="Item2" ItemText="Item #2" ItemImageSource="/Image2.jpg" />
...
</ListBox.Items>
</ListBox>
But I don't wan't to create a userControl just for that!!! Is there an easy way to put that template in the Window.Resources?
Thanks
If you are ONLY using it for that SPECIFIC listbox, you can just assign the ItemTemplate property. This will need to work in conjunction with a collection of custom objects defined in your resources somewhere else. This will save you from creating a custom UserControl, but you will need an object that can be defined in XAML and a list of them in XAML anyway. To be honest, creating a UserControl is relatively painless and may be easier, but it is possible without doing so.
<ListBox>
<ListBox.ItemTemplate>
<DataTemplate TargetType="CustomObjectType">
<Border>
<StackPanel Orientation="Horizontal">
<Image Source="{Binding ImageSource}" Height="30" />
<TextBlock Text="{Binding TextContent}" VerticalAlignment="Center" />
</StackPanel>
</Border>
<DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
EDIT: If you are going to use it in more than one place, put the DataTemplate in your Application resources and ive it a key, then assign the ItemTemplate property to {StaticResource MyListBoxItemsTemplateKey}
Not my favorite approach since it uses the XmlDataProvider and XPath syntax (which I tend to always forget). But you can embed your static data as xml within your Window.Resources like so:
<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Window.Resources>
<XmlDataProvider x:Key="MyStaticData" XPath="StaticItems" >
<x:XData>
<StaticItems xmlns="">
<StaticItem>
<ItemText>Item #1</ItemText>
<ItemImageSource>/Image1.jpg</ItemImageSource>
</StaticItem>
<StaticItem>
<ItemText>Item #2</ItemText>
<ItemImageSource>/Image2.jpg</ItemImageSource>
</StaticItem>
</StaticItems>
</x:XData>
</XmlDataProvider>
</Window.Resources>
<Grid>
<ListBox>
<ListBox.ItemsSource>
<Binding Source="{StaticResource MyStaticData}" XPath="StaticItem" />
</ListBox.ItemsSource>
<ListBox.ItemTemplate>
<DataTemplate>
<Border>
<StackPanel Orientation="Horizontal">
<Image Source="{Binding XPath=ItemImageSource}" Height="30" />
<TextBlock Text="{Binding XPath=ItemText}" VerticalAlignment="Center" />
</StackPanel>
</Border>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</Grid>
</Window>
Then within your ListBox bind to the XmlDataProvider you specified and use the XPath notation within the bindings to drill down to the data you want the controls to bind to.
This site has a couple good examples too:
http://vbcity.com/blogs/xtab/archive/2010/12/24/more-xpath-examples-in-a-wpf-application.aspx
Hope this helps!

Is there a way to group RadioButtons generated from the ItemTemplate of an ItemsControl

<DataTemplate x:Key="Genre_DataTemplate">
<RadioButton GroupName="One" Content="{Binding...
</DataTemplate>
Above code is the ItemTemplate of my ItemsControl, I want all the Radiobuttons instantiated should behave as if it is in a group, I know the reason because the generated RadioButtons are not adjacent in the visualtree.
Any solution or workaround to group them together?. GroupName property also doesn't have any effect here.
[Update] I am trying this in Silverlight
The problem is that the RadioButton.GroupName behavior depends on the logical tree to find a common ancestor and effectively scope it's use to that part of the tree, but silverlight's ItemsControl doesn't maintain the logical tree. This means, in your example, the RadioButton's Parent property is always null
I built a simple attached behavior to fix this. It is available here: http://www.dragonshed.org/blog/2009/03/08/radiobuttons-in-a-datatemplate-in-silverlight/
I think the problem is somewhere else in the control tree. Can you post more details?
Here is a sample xaml code that works as expected:
<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Grid>
<Grid.Resources>
<XmlDataProvider x:Key="flickrdata" Source="http://api.flickr.com/services/feeds/photos_public.gne?tags=flower&lang=en-us&format=rss_200">
<XmlDataProvider.XmlNamespaceManager>
<XmlNamespaceMappingCollection>
<XmlNamespaceMapping Prefix="media" Uri="http://search.yahoo.com/mrss/"/>
</XmlNamespaceMappingCollection>
</XmlDataProvider.XmlNamespaceManager>
</XmlDataProvider>
<DataTemplate x:Key="itemTemplate">
<RadioButton GroupName="One">
<Image Width="75" Height="75" Source="{Binding Mode=OneWay, XPath=media:thumbnail/#url}"/>
</RadioButton>
</DataTemplate>
<ControlTemplate x:Key="controlTemplate" TargetType="{x:Type ItemsControl}">
<WrapPanel IsItemsHost="True" Orientation="Horizontal"/>
</ControlTemplate>
</Grid.Resources>
<ItemsControl
Width="375"
ItemsSource="{Binding Mode=Default, Source={StaticResource flickrdata}, XPath=/rss/channel/item}"
ItemTemplate="{StaticResource itemTemplate}"
Template="{StaticResource controlTemplate}">
</ItemsControl>
</Grid>
</Page>
P.S.: In order grouping to work elements radio buttons should have same parent (as they usually have when generated from ItemsControl)

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