I've created a simple UserControl in Blend which contains (amongst other things) a ContentPresenter.
I'd like to be able to drop this UserControl onto another UserControl and then add other controls into its ContentPresenter, but when I include it in the second UserControl I can't see a way to do this.
Using Blend, how do I expose the underlying ContentPresenter so that its contents can be set visually (ie: so they appear as child controls in the Objects and Timeline window)?
If it’s a content control, to add child controls you set them as the content of the control
<MyContentControl>
<Grid x:Name=”ImAChild”>
</Grid>
</MyContentControl>
Edit: now that I think about it you might need to do something to make the Content property the default property which is populated by the inner xaml of your control, I can't remember exactly what it was but if your xaml looks like this (below) it doesn't matter anyway
<MyContentControl>
<MyContentControl.Content>
<Grid x:Name=”ImAChild”>
</Grid>
</MyContentControl.Content>
</MyContentControl>
Edit2
Your MyUserControl would need a MyContent property of type object and it'd have to somehow display the value of that property. You might be able to create it in the setter of the MyContent property but it seems "hacky"
<MyUserControl>
<MyUserControl.MyContent>
<Grid x:Name=”ImAChild”>
</Grid>
</MyContentControl.MyContent>
</MyUserControl>
Related
Could someone answer me the question about listview?
I have variable MyDatas which is collection of listview (and it works):
<ListView
x:Name="lstView"
HasUnevenRows="True"
ItemsSource="{Binding MyDatas}"> ...
Next I have (part of my code but is enough for explaining the problem):
<Label Grid.Row="0"
Grid.Column="1"
Text="{Binding E1}"
FontSize="{Binding FProp.Size1}"
FontAttributes="{Binding FProp.Atrib1}"/>
E1 is a field of MyDatas and this binding works correct. I have property of fonts in another variable FProp (FProp.Size1 and FProp.Atrib1) and this is problem! How can I use this another variable in this listview?
If FProp is used outside of listview all is ok, if I use it in listview it does not work.
Thank you for help
I believe you are not binding correctly the font size.
You are referencing a property named Size1 inside the object FProp which is not in your current binding context. The main problem is that you can only have one binding context per object. So, you should include the Size1 and Atrib1in your MyDatas object in order to make it available for the label. Another option is to change the binding context of the listview to point to FProp then you could access the values on the labels, but you will lose access to the E1 value. So you will need to choose how to fix this problem depending on the options provided.
You could add an x:Name to your ListView, let's say listView1 and use something like this
{Binding Path=BindingContext.FProp.Size1, Source={x:Reference listView1}}
I am trying to get a RichEditBox to take over the entire width of the app window and to be responsive to window resizing, so far the code I have is the following:
<RichEditBox HorizontalAlignment="Stretch"
TextWrapping="WrapWholeWords"
Height="250"
Name="Intro"/>
What I am getting from the code above is this:
Any ideas on how can I get this to work? Why is it that I tell the text to wrap and it doesn't follow?
UPDATE
I also tried this:
<RichEditBox HorizontalAlignment="Stretch"
Height="250"
Name="Intro"/>
But the result is:
The problem that I am having is that it seems that HorizontalAlignment="Stretch" does not really do anything. The only way I am able to set a decent width is by hard-coding it, for example: Width="600". But if I do this my UI will not respond correctly to resizing. I also tried HorizontalContentAlingment="Stretch" but the result is exactly the same.
How can I get my RichEditBox take up all the available Width and Wrap at the same time?
If you look at the documentation of RichEditBox.TextWrapping, you'll notice that WrapWholeWords is invalid. You have to use
<RichEditBox TextWrapping="Wrap"/>
-or-
<RichEditBox TextWrapping="NoWrap"/>
Since Wrap is the default value, you can drop the property.
<RichEditBox HorizontalAlignment="Stretch"
Height="250"
Name="Intro"/>
Edit: in reply to the updated question:
A control only takes the width of it's parent control. Some container controls (e.g. Grid) automatically take the full width available, while others (e.g. StackPanel) only take the required size of it's children. Using HorizontalAlignment="Stretch" in combination with a StackPanel as a parent control, will only use the MinWidth property instead of the full available width on your screen. Sometimes you can't directly see this issue, e.g. when your control is inside an itemtemplate of a ListView. Use the Live Visual Tree in Visual Studio to find the parent containers and locate the issue.
So in short: make sure your RichEditBox is inside a Grid (or similar control) instead of a StackPanel.
In XAML, you can create your own reusable control type as a UserControl object like this:
<UserControl x:Class="MyControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Grid>
<Button Content="Test"/>
</Grid>
</UserControl>
But you can also just change the base type in that view to be the same type as the content container like this:
<Grid x:Class="MyControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Button Content="Test"/>
</Grid>
What is the difference between these two options? In my example, they both derive from FrameworkElement and diverge in inheritance from there. But it seems like they function the same.
I'm sure there's a good reason for one versus the other, but I'm having trouble coming up with a good scenario to justify the distinction. Can anyone enlighten me?
Honestly, the main reason for having different base types is properties.
If you find that a UserControl doesn't have the dependency properties you need - perhaps you'd like it to expand some content from time to time, then you could base it on an Expander rather than going into the code-behind to type 'propdp' and reinvent the wheel, replace the template instead of just stuffing things into the "content" property and bind to the Expander's "IsExpanded" property.
Doing this allows you to blur the line between UserControl and Custom Control by essentially making a copy of the template of an existing control and adding to it; taking advantage of existing properties and adding new ones in code behind if needed.
The UserControl tag itself is just an average base, but if you feel something else is more fitting to what you want the control to be, then use that.
Or, if all you want is a glorified container to lob a bunch of textboxes or something in that will be frequently used, then you needn't change a thing.
I am creating a UWP application and I want a simple check box, no text, for each entry in my ListView. If I add a checkbox control to my template for the listview, I get a big gap after the checkbox for the Content - event when the content is empty.
If I turn on multiselect in the listview so I get a nice checkbox for each row, I can't seem to figure out how to databind the check box for each row in the listview to the Selected property of my ViewModel.
Below is a picture of what I want the area of the check box to look like. This was generated using the SelectionMode="Multiple" on the listview. Remember - the problem with this approach is I can't seem to find a way to bind the check box to the Selected property of my ViewModel class.
Below is what it looks like if I remove the SeletionMode property and add a check box to my ItemTemplate. As you can see there is a huge gap between the check box and the area where the image will be due to the Checkbox control's minimum width of 120.
Any suggestions would be greatly appreciated.
You could just set the MinWidth on the Checkbox itself
eg
<StackPanel Orientation="Horizontal">
<CheckBox x:Name="MyCheck" IsChecked="True" MinWidth="30"/>
<Rectangle Fill="Red" Width="100" Height="50"/>
</StackPanel>
The alternative is creating a copy of the Checkbox Styles and Template but that seems like overkill here.
How could one accomplish behavior in which a header of a ListView or GridView group doesn't scroll with the content, but stays fixed until the content comes to an end and the following header then comes in focus.
The behavior can be observed in Finance app on Windows 8 Release Preview when you scroll through GridView items.
I am not expecting the whole code, but I'd like to hear some ideas, links, code snippets, samples etc. which would help me get started.
Thanks
You might be able to embed a listview in a datatemplate of the main listview. Then you can embed a gridview and gridviewcolumns in the templated listviews and get your column headers that way.
Wrap the ListView in a ScrollViewer. The ListView's internal SrollViewer won't be used, and you'll have control of the outer ScrollViewer, which will allow you to set its TopHeader.
<ScrollViewer>
<ScrollViewer.TopHeader>
... Your header content here ...
</ScrollViewer.TopHeader>
<ListView HorizontalAlignment="Left" VerticalAlignment="Top">
... Your body content here ...
</ListView>
</ScrollViewer>