I cannot figure out how to animate WPF Expander with XamlFlair. My simplest template (should expand from top to bottom and contract to top):
<ControlTemplate TargetType="{x:Type Expander}">
<DockPanel>
<!-- EXPANDER HEADER -->
<ToggleButton x:Name="ExpanderButton"
DockPanel.Dock="Top"
HorizontalContentAlignment="Stretch"
IsChecked="{Binding IsExpanded, RelativeSource={RelativeSource TemplatedParent}}"
Content="Expand me"/>
<!-- EXPANDER CONTENT -->
<ContentPresenter x:Name="ExpanderContent"
DockPanel.Dock="Bottom"
xf:Animations.CombinedBinding="{Binding IsExpanded, RelativeSource={RelativeSource TemplatedParent}}"
xf:Animations.Primary="{xf:Animate BasedOn={StaticResource ScaleFromTop}, Event=None, TransformOn=Layout}"
xf:Animations.Secondary="{xf:Animate BasedOn={StaticResource ScaleToTop}, Event=None, TransformOn=Layout}"
xf:Animations.StartWith="{StaticResource ScaleToTop}">
</ContentPresenter>
</DockPanel>
</ControlTemplate>
Problem is that no matter what initial IsExpanded property value is, Expander renders expanded at the beginning. When I add xf:Animations.StartWith="{StaticResource ScaleToTop}" (or ScaleFromTop - no mater which one) not only this does not fix the issue but also Expander's content is always blank.
Does anyone know how to make it work as expected? Thank you.
I was scratching my head for two days, figured out the solution 5 minutes after posting the question.
Did not use xf:Animations.StartWith, added this instead:
<ContentPresenter.LayoutTransform>
<ScaleTransform ScaleX="1" ScaleY="0" />
</ContentPresenter.LayoutTransform>
Related
I want to have the ListItems to extend with their orange background the full width of the Listbox.
Currently they are only as wide as the FirstName + LastName.
I've set every element I can to: HorizontalAlignment="Stretch".
I want the background of the ListboxItems to expand as the user stretches the Listbox so I don't want to put in absolute values.
What do I have to do so that the background color of the ListBoxItems fill the width of the ListBox?
<Window x:Class="TestListBoxSelectedItemStyle.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:TestListBoxSelectedItemStyle"
Title="Window1" Height="300" Width="300">
<Window.Resources>
<local:CustomerViewModel x:Key="TheDataProvider"/>
<DataTemplate x:Key="CustomerItemTemplate">
<Border CornerRadius="5" Background="Orange" HorizontalAlignment="Stretch" Padding="5" Margin="3">
<StackPanel Orientation="Horizontal" HorizontalAlignment="Stretch" Width="Auto">
<TextBlock HorizontalAlignment="Stretch">
<TextBlock.Text>
<MultiBinding StringFormat="{}{0} {1}">
<Binding Path="FirstName"/>
<Binding Path="LastName"/>
</MultiBinding>
</TextBlock.Text>
</TextBlock>
</StackPanel>
</Border>
</DataTemplate>
</Window.Resources>
<Grid>
<ListBox ItemsSource="{Binding Path=GetAllCustomers, Source={StaticResource TheDataProvider}}"
ItemTemplate="{StaticResource CustomerItemTemplate}"/>
</Grid>
</Window>
I found another solution here, since I ran into both post...
This is from the Myles answer:
<ListBox.ItemContainerStyle>
<Style TargetType="ListBoxItem">
<Setter Property="HorizontalContentAlignment" Value="Stretch"></Setter>
</Style>
</ListBox.ItemContainerStyle>
This worked for me.
I'm sure this is a duplicate, but I can't find a question with the same answer.
Add HorizontalContentAlignment="Stretch" to your ListBox. That should do the trick. Just be careful with auto-complete because it is so easy to get HorizontalAlignment by mistake.
If your items are wider than the ListBox, the other answers here won't help: the items in the ItemTemplate remain wider than the ListBox.
The fix that worked for me was to disable the horizontal scrollbar, which, apparently, also tells the container of all those items to remain only as wide as the list box.
Hence the combined fix to get ListBox items that are as wide as the list box, whether they are smaller and need stretching, or wider and need wrapping, is as follows:
<ListBox HorizontalContentAlignment="Stretch"
ScrollViewer.HorizontalScrollBarVisibility="Disabled">
(credits for the scroll bar idea)
Since the border is used just for visual appearance, you could put it into the ListBoxItem's ControlTemplate and modify the properties there. In the ItemTemplate, you could place only the StackPanel and the TextBlock. In this way, the code also remains clean, as in the appearance of the control will be controlled via the ControlTemplate and the data to be shown will be controlled via the DataTemplate.
The fix for me was to set property HorizontalAlignment="Stretch" on ItemsPresenter inside ScrollViewer..
Hope this helps someone...
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ListBox">
<ScrollViewer x:Name="ScrollViewer" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Foreground="{TemplateBinding Foreground}" Padding="{TemplateBinding Padding}" HorizontalAlignment="Stretch">
<ItemsPresenter Height="252" HorizontalAlignment="Stretch"/>
</ScrollViewer>
</ControlTemplate>
</Setter.Value>
</Setter>
I also had the same problem, as a quick workaround, I used blend to determine how much padding was being added. In my case it was 12, so I used a negative margin to get rid of it. Now everything can now be centered properly
I've used WPF and IDataErrorInfo in the past apps to display errors to the user via a controltemplate by putting an image in the adorner and adding a tooltip to the image like this;
<Style x:Key="textStyle" TargetType="TextBox">
<Setter Property="Validation.ErrorTemplate">
<Setter.Value>
<ControlTemplate>
<DockPanel LastChildFill="True">
<Border BorderBrush="Orange"
BorderThickness="2"
CornerRadius="4"
SnapsToDevicePixels="True">
<Border.Effect>
<DropShadowEffect BlurRadius="10"
ShadowDepth="0"
Color="Orange" />
</Border.Effect>
<DockPanel>
<Image Width="16"
Height="16"
Margin="-20,0,0,0"
HorizontalAlignment="Left"
VerticalAlignment="Center"
RenderOptions.BitmapScalingMode="HighQuality"
Source="{StaticResource imgError}"
ToolTip="{Binding ElementName=adornedElement,
Path=AdornedElement.(Validation.Errors).CurrentItem.ErrorContent}"
ToolTipService.ShowDuration="30000" />
<AdornedElementPlaceholder Name="adornedElement" />
</DockPanel>
</Border>
</DockPanel>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
With the appropriate implementation of IDataErrorInfo in the ViewModel and setting Textbox in the view accordingly the image and tooltip are shown;
<TextBox Name="txt"
Grid.Column="0"
Height="40"
Background="Aqua"
Style="{StaticResource textStyle}"
Text="{Binding Path=Text,
UpdateSourceTrigger=PropertyChanged,
ValidatesOnDataErrors=True}" />
<TextBlock Grid.Column="1"
Height="40"
Background="AliceBlue"
Text="{Binding ElementName=txt,
Path=(Validation.Errors).CurrentItem.ErrorContent}" />
The above code displays correctly in my previous apps and shows the error in the image tooltip as confirmed by the Textblock.
However, in my current app which is built using Prism I can't get the Image to display. The TextBlock updates correctly and I can set the error to the TextBox tooltip via a style trigger without any issue. The problem is I can't seem to get the image (or anything else) to display in the Adorner. The Image is not shown and border is not changed.
The difference between previous apps and this is that the view is in a Region in a ContentControl and I've used dependency injection to inject the viewmodel into the view constructor and set the DataContext.
I can't figure out why this doesn't work when it did previously. I think I may need to include an AdornerDecorator somewhere but I'm perplexed as to where having tried it in a few places without success. Any ideas how I can ensure the Adorner is shown?
Used an AdornerDecorator to wrap the element containing the texbox and all works fine.
I Wish the treeviewitem to overlap the other items when i mouse hover it.
To do this i made the parent element (in my case its Border) within the HierarchicalDataTemplate to have the ZIndex as 0 and changed this value to 1 when the user hovers the mouse in the HierarchicalDataTemplate.Triggers section
<HierarchicalDataTemplate DataType="{x:Type d:MyClass}">
<Border Name="brd" CornerRadius="5" BorderThickness="1" Padding="3" Margin="0,0,60,0" Panel.ZIndex="0" >
<StackPanel Orientation="Horizontal" Margin="0,0,0,0" >
<Image Source="../Images/icon.jpg" Height="30"></Image>
<TextBlock TextAlignment="Center" Text="{Binding Text}"
Margin="3,0,10,0" >
</TextBlock>
<Image Margin="0,0,3,0"
Source="../Images/Img1.jpg" Height="30" />
<Image Margin="0,0,0,0"
Source="../Images/Img2" Height="30"/>
</StackPanel>
</Border>
<HierarchicalDataTemplate.Triggers>
<Trigger SourceName="brd" Property="IsMouseOver" Value="True">
<Setter TargetName="brd" Property="Panel.ZIndex" Value="1"></Setter>
</Trigger>
</HierarchicalDataTemplate.Triggers>
</HierarchicalDataTemplate>
The whole idea to implement this was:
Whenever the user hovers the mouse over a treeviewitem, the item should overlap the other controls and should be completely visible. Example: if the item is a long text, then the user should not be forced to use the scroll bar, rather if he just points it the item should be overlapping the other controls to display the complete item.
But i couldn't achieve this using the above triggers.
Please help me doing this.
Did you try using a ToolTip? I didn't try it myself but after seeing this I'm convinced that it's possible to define a DataTemplate which can be used at this property so the item is shown the way you like.
I hope this helps.
Regards
I am making a template control so that I can have a button with an image that changes when you click it. I also am trying to get text on top of the button that can change at run time. I have the button images and everything working but I can't seem to get that label at runtime so I can change the text. Here is the code in the xaml. I am missing the code behind
<UserControl.Resources>
<ControlTemplate TargetType="{x:Type Button}" x:Key="ActionButton">
<Grid>
<Label Panel.ZIndex="2" HorizontalAlignment="Center" VerticalAlignment="Center" FontFamily="Arial" Name="lblText" Foreground="#5E4421" FontWeight="Bold" FontSize="14">Test</Label>
<Image Name="Normal" Source="/AssaultWare.Controls;component/Replayer/Images/button_off.png"/>
<Image Name="Pressed" Source="/AssaultWare.Controls;component/Replayer/Images/button_on.png"/>
<Image Name="Disabled" Source="/AssaultWare.Controls;component/Replayer/Images/button_off.png" Visibility="Hidden"/>
</Grid>
<ControlTemplate.Triggers>
...
</ControlTemplate.Triggers>
</ControlTemplate>
</UserControl.Resources>
<Button Canvas.Left="471" Canvas.Top="465" Template="{StaticResource ActionButton}" Name="btnRight"/>
Difficult to decipher your question, but I think you just need to change the Label to a ContentControl and bind its Content property to the Button's Content property:
<ContentControl Content="{TemplateBinding Content}" .../>
The default behavior of the WPF Tabcontrol is to place the Tab Headers adjacent to each other, without any empty space in between. What if I wanted to specify a gap between the headers? Do I have to define a control template for this? I'm relatively new to WFP and any help is appreciated.
Thanks
I believe you will need to define a custom control template for the TabItem, maybe even one for the TabControl. Here is an example of a TabItem that uses a spacer for some separation.
<Style
x:Key="SpacedTab"
TargetType="{x:Type TabItem}">
<Setter
Property="Template">
<Setter.Value>
<ControlTemplate
TargetType="{x:Type TabItem}">
<Border
x:Name="Spacer"
Width="Auto"
Height="Auto"
Padding="0 0 5 0"
Margin="0 0 0 0"
BorderBrush="Transparent"
BorderThickness="0">
<Border
x:Name="Border"
MinWidth="150"
Width="Auto"
Height="30"
Background="Gray"
BorderBrush="DarkGray"
BorderThickness="0,0,0,0"
CornerRadius="6,6,0,0"
Cursor="Hand"
VerticalAlignment="Bottom">
<ContentPresenter
x:Name="ContentSite"
TextElement.FontSize="10pt"
TextElement.FontFamily="Arial"
TextElement.Foreground="Black"
VerticalAlignment="Center"
HorizontalAlignment="Center"
ContentSource="Header"
Margin="8,3,8,3"
Width="Auto"
Height="Auto" />
</Border>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
Hopefully that is a nudge in the right direction; you will still need to add that as a style resource and reference it from your TabControl -> TabItem.
It is easy to add space by doing it in the designer. Select the Tab you want to move, by starting with the rightmost tab. Then hold ctrl and use the right arrow key to move the tab to the right. Do the same with the rest of the tabs. Then you can manually adjust the margin in the xaml code.