Hi
I am trying to render buttons as the item template of a list, to be displayed horizontally. The problem is that they don't 'butt up' to each other. They leave a small gap betwen each one. I have tried allsorts of things to cure it, but have'nt succeeded.
Any ideas?
Try using the WPF tool Snoop to work out where the margin is coming from, and then fix it.
(Negative margins = code smell, in general, IMO.)
Try a negative margin, setting cliptobounds to false, maybe that can help
It's most likely either a Border, Margin, or Padding on your item container (i.e. ListBoxItem if you're using ListBox) which can be corrected with the ItemContainerStyle or your Button's Border is using BorderThickness=1, BorderBrush=Transparent or null.
Use Snoop as Dan suggested to find out.
Related
I've this situation:
A label placed in Footer Cell of a RadGridView doesn't have sufficient width available in its container for displaying its full text.
Is it possible by any ways to have the label cross its container boundaries and show full text?
Thanks!
The space given to any element depends on the parent control or Panel that contains it, as well as its Width, Height, Horizontal and VerticalAlignment, and Margin. Normally you can manipulate some combination of these directly to change overlapping behavior but by using a DataGrid control you've given up a lot of that control since things like ColumnSpan are set up by the control internally. You could try setting negative Margin values and changing the Panel.ZIndex but I doubt those will help.
The best solution I can recommend without more detail is to use TextWrapping or TextTrimming to avoid ugly clipping, maybe in combination with a ToolTip showing the full text.
You can overlay any WPF element by another anytime. Only place where it fails is the WebBrowser control .The WPF WebBrowser has not been improved a single bit from WinForms WebBrowser. It is still the same simple activex control. However, you can bypass even that with a tooltip control.
I believe you can either set ClipToBounds=False to allow it to expand outside its area, or set TextWrapping=Wrap to allow the text to wrap.
EDIT: Forgot ClipToBounds is only honored in the Canvas control, so wrap your label in a Canvas and set ClipToBounds=False and it should work.
I have a ListBox that contains a number of User items that are DataTemplated to appear as UserControls in the ListBox. Each UserControl can be expanded in size. To start with, the ListBox is big enough to display them all in their unexpanded state. The problem that I have is that when a number of these UserControls are expanded together, they extend out of the ListBox's visible area. The ListBox does not recognise this fact and no ScrollBars appear, even when they are set to Visible.
I am using DoubleAnimations to alter the UserControl heights when the user clicks on a button in each one. Is there something that I have to do, or some setting on the ListBox that must be set to get it to register the size changes of the UserControls that represent its items and display ScrollBars when needed?
Edit>>>
I have tracked down the problem to a custom WrapPanel that I am using in the ListBox.ItemsPanel. When I remove it, or replace it with a standard WrapPanel, ScrollBars appear when required. I got the code for the Panel from a good article about creating custom WPF panels. Can anyone see what's missing from the code given in the article and why it might stop the ScrollBars from displaying?
I wonder whether ListBoxes normally do what you are expecting? You might try calling InvalidateMeasure/Layout on the ListBox if you know when the item sizes change, just to see?
I decided to write the custom WrapPanel code again completely and this time it worked correctly! When comparing the new version with the previous version, I could see that a + was missing from a += in a measuring calculation and so the Panel thought that the items were much smaller than they really were... hence no ScrollBars.
So, if you have this problem, check your measuring code carefully.
I'm building a silverlight app in Blend that will contain a treeview and treeviewitems. The contents of my treeviewitems all have a blue border (when clicked and when you hover the mouse over), as you can see in the image I linked to. I cannot figure out what causes that border, or how to remove it; anyone know where to get at it? I've tried looking in the various treeview related templates, but I've had no luck so far.
I think what you are seeing here is the FocusVisual:
http://msdn.microsoft.com/en-us/library/system.windows.frameworkelement.focusvisualstyle.aspx
If you set this to {x:Null} (via FocusVisualStyle), it should go away...if not, you're likely dealing with a "selected" VisualState, in which case your best option is to override the template to remove that particular state.
I have some controls added in a stackpanel programmatically. What i want to do is that i want one of the controls in this stackpanel to be placed over another control. Specifically, I want to place button over an image in this stack panel. I couldn't find zindex property in c# codebehind. Although it seems very simple problem but i am unable to find any clue to solve this problem. Anyone please......??
Try placing all your controls on Canvas. Then you can set Zindex with:
this.controlName.SetValue(Canvas.ZIndexProperty, 10d);
Only the Canvas panel supports a ZIndex property. Stackpanel doesn't because each item is placed one after the other in the panel so they shouldn't overlap each other. This can be a little annoying at times when you have animated transforms moving the items about because the previous assumption isn't actually true.
In general though if you need to place items in a visual stack the Stackpanel isn't the right place for it. Perhaps a Canvas or you could use a Grid where the oridinal position of a element determines its "zorder" in a cell.
From xaml:
<StackPanel Canvas.ZIndex="1">
</StackPanel>
in above image you would notice that, doted rectangle indicating ComboBox is focused
But the problem is it exceeding the text area of ComboBox... how do I align it with text area WPF Style?
Thanks
Without seeing your ControlTemplate it's difficult to give the best way to change it.
One slightly hackish way to do it is set Focusable on the ComboBox to False and then set Focusable on the TextBlock (or Label) to True. This should make it so the TextBlock gets focus whenever the ComboBox should.
My best guess though is that you have some weird margins going on, the real way to fix it would be to straighten those out.