I have a wpf window, and there is a footer sections that can have multiple content which makes the width of the footer grows.
I set SizeToContent="WidthAndHeight" in my Window and when I add a lot of content to ScrollViewer, it grows accordingly, instead of just show the scrollbar.
It looks like ScrollViewer is taking into account its content, so how do I set the ScrollViewer to ignore it's content and only take the width available instead of make it grow?
thanks!
I suspect that by setting SizeToContent="WidthAndHeight" you tell the controls inside the window that they "can have all the space they want", so the ScrollViewer does not do anything becase it is not being restricted by its parent which is a necessary condition for a ScrollViewer to work (and make sense).
Try setting the MaxWidth property of the ScrollViewer. Once it has reached this width, it should start showing scrollbars.
Related
I want to create resizable window wich will initially autosize to its content.
If the size of the window reaches some limits autosizing is disabled and growing controls are either clipped or shown with scrollbars.
Autosizing also must be off when user resizes the window.
The real task is to create convinient resizable dialog window with text control.
When it contains not much and not few text lines it is reasonable to initially autosize the dialog. The amount of text increases and dialog becomes larger. Sure it must have some size constraints.
P.S. I think it's quite a frequent task to define the layout where the guiding role of the sizing during measure pass of the layout conditionaly swithces from children to parent and back.
Share you ideas or existing solutions. May be I'm missing something.
Thank you.
Update 1
Let me explain the algorithm:
1) Window is shown (let's imagine all data/content is already set).
2) Its size is adjusted as if window's properties were:
MaxHeight = ...
MaxWidth = ...
SizeToContent = "WidthAndHeight"
3) User tries to resize the window. And he can do it. Inner controls change accordingly their size.
This behavior is equivalent to the properties set:
MaxWidth= "{x:Ststic Double.PositiveInfinity}"
MaxHeight = "{x:Ststic Double.PositiveInfinity}"
SizeToContent = "Manual"
ResizeMode = "CanResizeWithGrip"
Yes, you can do it with XAML only using animations/triggers but it's a little tricky.
Just hook into TextBlock Loaded event(xaml only) and change SizeToContent=manual && MaxWidth&MaxHeight=PosInfinity inside EventTrigger using animation.
Many of WPF's panels automatically resize based on their children. I'd recommend looking through this article to get an idea of what kind of layout panels are available in WPF: WPF Layouts: A Visual Quick Start
But to answer your question, place all your controls you want automatically sized in a panel that automatically stretches its children, such as a Grid or a DockPanel, and set the MaxHeight and MaxWidth properties of the panel to prevent it from growing past a certain height/width.
<Grid MaxHeight="100" MaxWidth="200">
<!-- Place your content here -->
</Grid>
Depending on the default behavior of the parent control containing your panel, you may need to set the HorizontalAlignment and VerticalAlignment to something other than Stretch too.
<Grid>
<Grid MaxHeight="100" MaxWidth="200" HorizontalAlignment="Left" VerticalAlignment="Top">
<!-- Place your content here -->
</Grid>
</Grid>
If you want a ScrollBar instead of clipping the content, add a ScrollViewer inside the Grid
I am having problem understanding the scrollviewer in silverlight webpage. There are the usercontrol and grid "layoutRoot". My scrollviewer is set before the "Layoutroot" grid. It never worked properly. Even though I have other items at the bottom of the page, I could not scroll to them and could not see them. I have been playing with UserControl MinHeight, DesignHeight and minHeight of both LayoutRoot and Scrollviwer. Just have a hard time figuring out what is the best way to set it up.....
You need to remove min height and max heigh from all of the control because Silverlight takes care of all those things. What you need is to set VerticalScrollBarVisiblity to auto. By default it is disabled and you will be able to achieve what you want.
Cheers!
Vinod
If the MinHeight properties are set too large then it will not be viewable on the screen and will be cut off. If you remove the MinHeight properties on both the UserControl and ScrollViewer then it should work fine.
Or if that doesn't work post your code so we can have a look.
In the Windows Forms world you can take a panel and set it's dock property to fill and so on with nested panels, when the user resizes the window the panels and nested panels automatically resize too. I want to achive something similar with Silverlight, here is my current structure.
Main
ScrollViewer // for body
UserControl
Grid
control
Scrollviewer // this is where my problem is
Control
The problem is I can set a size for the nested scroll viewer that looks good for 1024 resolution, but I also want to account for users that have larger resolution. If I leave it auto the content just stretches below the visible bottom line and defers to the top level ScrollViewer.
If I could achieve something analogous to how Windows Forms handles this with docking I think my problem would be solved. I must have a ScrollViewer for the nested panel and I want it to fill all visible space left. How Can I achieve this with SL4 or WPF?
[Edit]
Here is an illustration of what i'm after.
The top-level ScrollViewer allows its content to be as large as it needs to be, and adds scrollbars if that means they don't fit in the window. Its children no longer know or care how tall the window is; they just know that they've got as much space as they want.
So what is it that you want from your nested ScrollViewer? It's got all the space it needs, so it will grow to show all of its content -- there's nothing to restrict it to the height of the window. In fact, you added a top-level ScrollViewer, which specifically told it "don't restrict it to the height of the window".
If you want your inner ScrollViewer to be restricted to the window height, then take out the top-level ScrollViewer.
Right now I have a problem with StackPanels inside DockPanels. Often the StackPanel is taller than necessary for the contents, so the contents are stretched.
Is there something I can place in or around the StackPanel to mean "don't cause children to consume all avaialble space".
AFAIK the contents of the StackPanel do not "stretch" to fill it, anymore than any other control. i.e. the stretch to fill will be controlled by the HorizontalAlignment and VerticalAlignment of the child elements.
The default is usually Stretch. Try setting it to Left etc.
Well, what do you want your StackPanel to do? If you want it to only consume the visible space, use a grid. If you want to scroll the contents of your StackPanel, I believe you can put it in a ScrollViewer.
How do I make a Canvas stretch fully horizontally with variable width? This is the parent Canvas, so it has no parents, only children.
XAML Source: it displays in blend
http://resopollution.com/xaml.txt
Use a Grid as the top level element in your UI - it'll stretch to fill its container. Then put a Canvas with HorizontalAlignment="Stretch" inside the Grid and it'll behave the way you want.
<Grid xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Canvas Background="Blue"/>
</Grid>
That worked for me. The key is your top level UI element. While a Grid fills all available space by default, Canvases take up only as much room as their contents demand.
I'm guessing you've tried
canvas.HorizontalAlignment = HorizontalAlignment.Stretch
If this doesn't work, then what you could do is bind the Width and Height properties of the canvas to the ActualWidth and ActualHeight properties of the containing window.
You could use a dock panel to get it to fill the available width. The last item in a dock panel list of controls is automatically stretched to fill the remaining space.
<DockPanel>
<Canvas />
</DockPanel>
The canvas should do this automatically, unless you are manually setting the height and/or width. What kind of control are you trying to place the canvas on? Can you post your code?
The problem is that you're specifying the Height and Width. Without these properties, the control may appear to vanish in the designer, but it should size appropriately when you insert the canvas into another control.
If I recall correctly, the next version of WPF will have 'DesignWidth' and 'DesignHeight' properties that allow you to show the control in the designer with a given size without effecting it's measurement when inserted into other controls.