I've got a Stackpanel which is set to horizontal orientation and Horizontal alighment is set to Stretch. Inside it I've got two elements: 1. TextBlocks 2. Image. I want the 2nd one to display on extreme right.
<StackPanel Orientation="Horizontal" HorizontalAlignment="Stretch">
<TextBlock>Hello World</TextBlock>
<Image Height="100" Width="100" />
</StackPanel>
How do I accomplish it?
You almost had it.
<Grid>
<TextBlock>Hello World</TextBlock>
<Image Height="100" Width="100" HorizontalAlignment="Right" />
</Grid>
Just don't use a StackPanel.
// Best of luck!
Related
If I use 'SourceGraphic' as in2 inside feDisplacementMap, things looks good. However, if I use anything else, the deformation is not applied.
Because of that, I have to define the deformation source first, and then apply the filter to the deformation source, which is quite counter-intuitive, at least for me.
For example, in the example below I have to define the circle and then apply the filter to the circle. Inside the filter I use feImage to load the kitten image. But that feels reverse to me. This works:
<svg>
<defs>
<filter id="displace">
<feImage href="https://placekitten.com/500/500" result="kitten" />
<feDisplacementMap
scale="10"
xChannelSelector="R"
yChannelSelector="R"
in="kitten"
in2="SourceGraphic"
/>
</filter>
</defs>
<circle cx="50" cy="50" r="50" fill="#f00" filter="url(#displace)" />
</svg>
As you can see, applying a displacement to a small part of an image becomes quite painful, as you have to first create the displacement map yourself, and it must have the same size as the image. Like this:
<g id="deformation-source" filter="url(#displace)">
<rect x="0" y="0" width={imageWidth} height={imageHeight} fill={neutralToDeformation} />
<circle cx="50" cy="50" r="50" fill="#f00" filter="url(#displace)" />
</g>
Also, applying 2 different deformations to the same image, requires you to put the objects that will cause the deformation, instad of doing something like this:
<image href="kitten-url" filter="url(#filter-1)" />
<image href="kitten-url" filter="url(#filter-2)" />
What I would like to be able to do is to load the kitten as an SVG image tag, and then apply the filter to that image, where I would load the circle inside a feImage making a reference to the object's id, which I would have previously defined inside the defs section. This doesn't work:
<svg>
<defs>
<circle id="displacement-source" cx="50" cy="50" r="50" fill="#f00" />
<filter id="displace">
<feImage href="displacement-source" result="displacement-source" />
<feDisplacementMap
scale="10"
xChannelSelector="R"
yChannelSelector="R"
in="SourceGraphic"
in2="displacement-source"
/>
</filter>
</defs>
<image href="https://placekitten.com/500/500" width="100" filter="url(#displace)" />
</svg>
I'm not sure if I'm the one that's thinking this backwards or if I'm missing something. What's going on with this?
You can define your displacement source within the feImage, but it has to be an complete image defined as an inline URI in order to be cross browser compatible.
<feImage width="500" height="500" xlink:href="data:image/svg+xml,%3Csvg width='247' height='34'etc. etc.
Please see this article for more detail on how to escape characters in the svg+xml format - as far as I can remember there are some gotchas vs. vanilla HTML escaping.
If you don't care about Firefox, you can use a fragment identifier instead of inlining a whole SVG.
<feImage width="500" height="500" xlink:href="#idOfElementYouWantToUse"/>
Also remember that there are cross-origin security rules on displacementMap sources - so you can't displace an image using a map from another domain (or vice versa - I'm a little hazy on which way the restrictions run).
I am wondering how to draw beyond the boundaries of the standard WPF tab control? I have tried the various ClipToBounds settings and inserted my control within a canvas, which has worked for me with a grid in the past. Sample XAML:
<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" mc:Ignorable="d" x:Class="MainWindow"
Title="MainWindow" Height="350" Width="525">
<Grid>
<TabControl HorizontalAlignment="Left" Height="50" Margin="90,31,0,0" VerticalAlignment="Top" Width="100">
<Canvas Margin="10,26,-10,-26">
<Ellipse Width="25" Height="25" Fill="Red" Canvas.Left="0" Canvas.Top="0"></Ellipse>
</Canvas>
</TabControl>
</Grid>
This is an old post, but this answer solved the problem for me. You can use this template and just change the Grid's ClipsToBounds to False. https://zamjad.wordpress.com/2010/05/05/use-different-panel-in-tab-control/
Visual Studio 2012 Project with memory leak
Hello!
I've found a memory leak when using Interaction Triggers in the MVVM Light Toolkit.
I use this xaml
<UserControl x:Class="MemoryLeakTest.MainPage"
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:ignore="http://www.ignore.com"
mc:Ignorable="d ignore"
xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
xmlns:mvvm="clr-namespace:GalaSoft.MvvmLight.Command;assembly=GalaSoft.MvvmLight.Extras.SL5"
x:Name="control"
DataContext="{Binding Main, Source={StaticResource Locator}}">
<Grid x:Name="LayoutRoot">
<ItemsControl ItemsSource="{Binding LeakObjects}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<Border Width="300" BorderThickness="6" BorderBrush="BlueViolet" CornerRadius="3">
<Grid Background="{Binding ColorBrush}" >
<StackPanel>
<Button Command="{Binding ElementName=control, Path=DataContext.Command}" Width="100" Height="40" Content="Tryck!">
<i:Interaction.Triggers>
<i:EventTrigger EventName="Click">
<mvvm:EventToCommand Command="{Binding ElementName=control, Path=DataContext.Command}" CommandParameter="{Binding}"/>
</i:EventTrigger>
</i:Interaction.Triggers>
</Button>
<TextBlock Text="{Binding Text}"/>
</StackPanel>
</Grid>
</Border>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</Grid>
and then i rebind the list LeakObjects so that it creates new items.
The old items (xaml) like buttons and text blocks are still in memory and doesn't GC.
If I write
<Button Command="{Binding ElementName=control, Path=DataContext.Command}" Width="100" Height="40" Content="Press!"/>
and use the buttons Command parameter there is no memory leak but if I use the
<i:Interaction.Triggers>
<i:EventTrigger EventName="Click">
<mvvm:EventToCommand Command="{Binding ElementName=control, Path=DataContext.Command}" CommandParameter="{Binding}"/>
</i:EventTrigger>
</i:Interaction.Triggers>
there is a major leak.
The problem is that there are no Command parameters on grids etc.
The project in the link has this very simple project demonstrating the problem.
Is there a way to circumvent the memory leak? Maybe I'm using it wrong.
It is crucial that I find a way to fix this because this memory leak is all over our application.
I've experienced this leak as well. I've solved it by not using the EventToCommands and rather using just plain event handlers and calling the commands from these methods in page code-behind. It's not that clean, but it works and the page is Garbage Collected as expected.
Or you could use InvokeCommandAction instead, works for me.
http://www.dotnetpatterns.net/entries/21-Memory-Leak-issue-with-EventToCommand-passing-binding-to-RelayCommand
I'm currently trying to design a table for contact information including a column for icons like telephone, email or similar symbols and I want to align them with the text from the next column
icon | Telephone:
| +1212354567
icon | Email:
| x#y.com
Is there any Layout which can be compared in functionality to Androids RelativeLayout? I tried to work with the Grid Layout but this seems to be error prone and not exact enough. I don't want to divide my layout into columns and rows, instead I want to describe their position as it is used in RelativeLayout (toLeft, toRight, AlignParentBottom etc.).
The StackPanel can be compared to the LinearLayout, which I want to avoid as it is not suitable for my current design.
Is there any comparison between Windows Phone and Android Layouts on which I can orientate? This one is incomplete and does not give advise for the RelativeLayout.
I know you said you did not want to use a Grid but I feel that you have to in this case.
I would structure it with both a grid and stack panels though.
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<!-- Image for first row item -->
<Image Grid.Column="0" Grid.Row="0" Source="icon-url" />
<!-- Container for the details of the first row item -->
<StackPanel Grid.Column="1" Grid.Row="0">
<TextBlock Text="Telephone:" />
<TextBlock Text="+1212354567" />
</StackPanel>
<!-- Image for second row item -->
<Image Grid.Column="0" Grid.Row="1" Source="icon-url" />
<!-- Container for the details of the second row item -->
<StackPanel Grid.Column="1" Grid.Row="1">
<TextBlock Text="Email:" />
<TextBlock Text="x#y.com" />
</StackPanel>
<!-- Just add rows to the grid to continue the list -->
</Grid>
There is no panel that compares, but someone that was adventurous could create one. There are many articles on how to do this, but here's one for reference. http://www.switchonthecode.com/tutorials/wpf-tutorial-creating-a-custom-panel-control
That said, there's no reason not to use Grid for what you're trying to do. It's not "error prone" or "not exact enough". SharedSizeGroup should become your friend here, though.
My ListBox is databound to 2 fields. The first is left aligned which is fine, the problem is with the second one which has to be right aligned. I tried using TextAlignment ="Right" and also HorizontalAlignment="Right", none of them worked.
Here is a sample code:
<ListBox x:Name="_listBox">
<ListBox.DataTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal" Margin="0,4,8,0">
<TextBlock Text="{Binding Path=ContainerNumber}" />
<TextBlock TextAlignment="Right" Text="{Binding Path=Content}"/>
</StackPanel>
</DataTemplate>
</ListBox.DataTemplate>
Any ideas?
Add to the StackPanel markup:
<StackPanel Orientation="Horizontal" HorizontalAlignment="Stretch" Margin="0,4,8,0">
This problem is that the StackPanel isn't using all the width available because it is by default aligned Left horizontally.
EDIT: Alternatively you need to style ListBoxItems:
<ListBox.Resources>
<Style x:Key="{x:Type ListBoxItem}" TargetType="{x:Type ListBoxItem}">
<Setter Property="HorizontalContentAlignment" Value="Stretch"/>
<Setter Property="HorizontalAlignment" Value="Stretch"/>
</Style>
</ListBox.Resources>
Hope this helps.