WPF - Rotate transformed object doesn't rotate cursors

Question

5.00/5 (1 vote)

See more:

I'm working on an app which allows objects to be dropped on a canvas, resized, and rotated. I started from the DiagramDesigner 1 code here on code project. I've got things working pretty well, except for one problem that also occurs in the DiagramDesigner example.

Once the control is rotated (along with the adorner layer), the cursors over the resize thumbs are wrong because they don't rotate. For example, the cursor attached to the right hand side of the object is the Resize EastWest cursor. (horizontal left/right arrows). Once the control is rotated 90 degrees, the thumb correctly resizes the object in a rotated manner, but the cursor is still pointing left/right.

Anyone got a better way to do this? Can the cursors be rotated? Should I draw my own shapes instead?

Edit: Not sure how to respond to answers, but yes, I'd expect that an object turned 45 degrees would have the bottom thumb pulled diagonally (at a right angle to the bottom of the object. Otherwise for a full 90 degree rotate, the cursor is pointed completely the wrong way from the drag operation.

Posted 21-Jan-10 6:57am

Mike Fox

Updated 22-Jan-10 3:14am

v2

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Rob Philpott · Answer 1 · 2010-01-22T02:20:00

Interesting question, for which I don't have an answer I'm afraid, but I suspect the cursors perhaps should not rotate.

If you rotate something through 45 degrees, so the resize cursor is diagnal, does that imply that the user should now move their mouse in a diagnal direction to scale up or down? Possibly so, but it sounds weird.

Abhinav S · Answer 2 · 2010-01-22T04:51:00

Solution 2

Have a look at this[^] link in Silverlight.

Rotate any of the images - the icon rotates as well. Very very cool.
You may need to look at how this code can be rewritten in WPF.

Posted 22-Jan-10 4:51am

Abhinav S