i am trying to take a snapshot of my screen in a wpf application. everything works fine, but the only problem is that, when i need to take the screenshot of the contents of a stakpanel which have some hidden contents in a scrollviewer's scrolled area, my code only takes a snaphsot of the visible part of stackpanel. plz take a look below...
RenderTargetBitmap renderBitmap =
new RenderTargetBitmap(
(int)spMain.ActualWidth,
(int)spMain.ActualHeight,
70d,
70d,
PixelFormats.Pbgra32);
ActualWidth/ActualHeight properties only provide the height/width of the visible part.
Q- how can i get a snapshot of the complete stackpanel?
thanks
I solved the issue by measuring and arranging the UI Element before taking the snapshot.
spMain.Measure(new Size(spMain.ActualWidth, spMain.ActualHeight));
spMain.Arrange(new Rect(new Size(spMain.ActualWidth, spMain.ActualHeight)));
:)
Related
I have a lot of images placed on a canvas (~150 pages converted PDF).
I would like to be able to move around from one region to another of this canvas by animating the movement (zoom and pan).
My animation keys are in a listbox. I have a "play" button to play all.
When I click an animation key, my "camera" automatically moves to the defined location.
It's a kind of "Prezi wall".
This is only half or three quarters of an answer really, but hopefully you can fill in the gaps. You could try using the VisualBrush Class. First you set up the visual that the VisualBrush will paint using your full Canvas:
VisualBrush visualBrush = new VisualBrush();
visualBrush.Visual = yourCanvasElement;
You then paint with the Brush onto, let's say, a Rectangle element:
Rectangle rectangle = new Rectangle();
...
rectangle.Fill = visualBrush;
You can then use the VisualBrush.Viewbox property to move the content about. Now I think that there is some way of zooming in and out, but I can't remember at the moment.
Alternatively, you could use the ViewBox class. You can get your zooming effect by changing the size of the content and the ViewBox and get your panning effect by using a ScrollViewer. There's a post on StackOverflow that demonstrates this, so please take a look at the Zooming To Mouse Point With ScrollView and ViewBox in Wpf post for more help with this method.
I need to put a RichTextBox inside a container such as a canvas/grid/stackpanel or anything which serves the purpose best.
look at the example I made:
in the picture RichTextBox is white, Canvas is LightBlue, and the main window's Grid is salmon(=light orange)
The user starts typing inside the RichTextBox. as far as he DOESN'T press enter or shift+enter, the RichTextBox must resize horizontally as long as the sentence is, on the condition that it doesn't exceed the main grid's boundaries.
RichTextBox must also resize vertically, when the user starts typing in new lines, but should not exceed the grid's boundaries.
So how is it done ?
This is not the best aproach that you looking for but i't works...
Just increase the Document.PageWidth based on the content inside the textbox by doing this
richTextBox1.Document.PageWidth = 1000;
However, consider looking for No Wrap for the richtext box. Wich i'm out of time to give more help.
I have a WPF window and an Image in a grid in the window. I am animating the Image so it moves from out of view (beyond widow location) into the window.
The animation is nice and smooth and everything works but I notice the image is over top of the window border while it is moving. The image at the end of this question is what it looks like.
Why would the image be over top of the window border, and how do I get it to be "under" the border?
Thanks in advance!
Well after a lot of trial and error it seems the problem was the fact I was moving the image in a grid that had no defined width, so the width would expand over the border when moving the image thus extending the "client" area of the window and showing over the window area.
Once I defined a specific width of the grid, everything worked.
WPF grid container, with multiple rows/columns with usercontrols loaded in the sections.
Some rows/columns are expanded/collapsed by setting the Column/Row width (from 0 to 125* or a fixed value), based upon a button click.
Simple example code:
If colgrdFolder1.Width.Value Then
Me.Width = Me.Width - colgrdFolder1.ActualHeight
colgrdFolder1.Width = New GridLength(0)
Else
Me.Width = Me.Width + 150
colgrdFolder1.Width = New GridLength(150)
End If
This works, but when the parent resizes, it flashes as the column/row is set. When the parent Width is first increased you can see the grid resize and then when the new colWidth is set, it resizes (and flashes) again.
Is there not a property/method to freeze the window/prevent redraws until the resize is complete?
I think there are BeginInit() and EndInit() methods, that should do what you want (prevent redraw), but in my experience they haven't really worked (maybe I have used them incorrectly).
I don't know of any other way of preventing redraw, perhaps someone who is more of an expert in WPF can shed some more light...
I would like to animate a transition when moving content between two panels. I am getting a bit map image of a detail record and docking it as a thumbnail in the panel below. The docking area is in a footer grid and the content detail is in another grid that sits above the dock area (the dock and the main content area live in separate rows of the root layout control - another grid).
I have tried implementing this with a ScaleTransform and a TranslateTransform, simultaneously shrinking the image and moving it towards the footer control. When it moves into the footer control, it gets clipped even though the image Canvas.ZIndex property is set to a very high number. Eventually the thumnbail will need to be a child of a StackPanel that sits inside the footer grid.
Thanks for your consideration and help.
I had a similar problem (clipping) with a WPF animation I had. The problem was that the owner of the animation needed to be a parent of both containers for the animation to work (in my case I made it the actual window holding the containers).
Without any code, I can't see if that is your problem, but I thought I would throw it out there.
You can see my code where I animate moving from one container to another here:
http://wiassistant.codeplex.com/sourcecontrol/changeset/view/36638?projectName=WIAssistant#924851
(See the AnimatePaneBox method at the bottom of the file.) This may or may not be useful to you.
I've done something similar by creating a Canvas that sits over the top of both containers, using a WritableBitmap (if necessary) to create a rendering of the object that you're moving and attach it to that Canvas, animate the bitmap (translate, scale, opacity, whatever), and then pop the new object in under it at the end of the animation. It can be brittle if your controls need to be able to move or resize, but in most of my circumstances it's been a reliable hack.