StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POWPF: Drawing canvas content to a bitmap problem
primarykey
Id
7204262
data
AcceptedAnswerId
7249120
AnswerCount
1
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2011-08-26T11:54:13.680
FavoriteCount
0
LastActivityDate
2011-08-30T20:04:37.040
LastEditDate
2011-08-26T14:10:58.617
LastEditorUserId
154112
OwnerUserId
913892
ParentId
0
PostTypeId
1
Score
1
ViewCount
707
LastEditorDisplayName
text
Body
<p>I have a custom control of class DottedCanvas inherited from Canvas, which contains some custom controls of class TreeNode inherited from TextBox. The canvas control has style:</p> <pre><code><Style x:Key="DottedStyle" TargetType="TreeBuilder:DottedCanvas">  <Setter Property="Background" Value="{StaticResource DottedBrush}"/> <Style.Triggers> <Trigger Property="DottedEnabled" Value="False">  <Setter Property="Background" Value="White"/> </Trigger> </Style.Triggers> </Style> </code></pre> <p>The TextBox controls are wrapped to a UserControl and also have their own style:</p> <pre><code><Style x:Key="NodeBoxStyle" TargetType="{x:Type TreeBuilder:TreeNodeBox}"> <Setter Property="BorderThickness" Value="1"/> <Style.Triggers>  <Trigger Property="IsBeingPrinted" Value="true"> <Setter Property="BorderThickness" Value="0"/> </Trigger> </Style.Triggers> </Style> </code></pre> <p>Then I'm trying to print this canvas to a bitmap:</p> <pre><code>public BitmapSource BuildImage(Tree tree) { canvas = tree.Canvas; PrepareTree(canvas); Size size = GetSize(); canvas.Measure(size); canvas.Arrange(new Rect(size)); RenderTargetBitmap image = new RenderTargetBitmap( (int)size.Width, (int)size.Height, 96, 96, PixelFormats.Pbgra32); image.Render(canvas); UnprepareTree(canvas); return image; } private void UnprepareTree(Canvas canvas) { canvas.DottedEnabled = true; foreach (var element in canvas.Children.OfType<IPrintable>()) { element.IsBeingPrinted = false; } } private void PrepareTree(Canvas canvas) { canvas.Focus(); canvas.DottedEnabled = false; foreach (var element in canvas.Children.OfType<IPrintable>()) { element.IsBeingPrinted = true; } } </code></pre> <p>The image looks so:</p> <p><a href="http://i.stack.imgur.com/7uKUs.png" rel="nofollow">Result</a></p> <p>The Canvas has no dots (the style did its work) but the TextBox's BorderThickness stays 1 on the image. A breakpoint in <code>PrepareTree()</code> function shows that TextBox BorderThickness property is set to zero (that means, the style works too). How can I get the "new" version of TextBoxes on the image? </p>
Tags
<wpf><textbox><wpf-controls><styles><rendertargetbitmap>
Title
WPF: Drawing canvas content to a bitmap problem
singulars
PostAcceptedAnswerId
1. PO
  singulars
  PostTypePostTypeId
  PTAnswer
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USSimon Sarris
UserOwnerUserId
1. USEgor Antonov
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
  singulars
  PostTypePostTypeId
  PTAnswer
VotesPostIdCreationDate
1. VO
  singulars
  PostPostId
  POWPF: Drawing canvas content to a bitmap problem
  UserUserId
  This table or related slice is empty.
  VoteTypeVoteTypeId
  VTUpMod
CommentsPostId
1. This table or related slice is empty.

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.