rectangle contains

[Rob T]

Hi.

I have a program that creates an image and displays it to the
screen....pretty simple. I put it into a matrix so that I can rotate it. I
would also like to be able to know when I click on it so I am doing a
rectangle.contains. This works fine if the image isn't rotated. But if it
is, how can I get the rectangle.contains to rotate also? Thanks.

Dim im As Bitmap
im = bar.BuildMyImage
Dim mx As New Matrix
mx.Translate(StartPos.X, StartPos.Y)
mx.Rotate(Rotation)
G.Transform = mx
G.DrawImage(im, 0, 0, im.Width ,im.Height)
G.ResetTransform()

In my mouse onclick event:

Return New Rectangle(New Point(X1, Y1), New Size(im.width,
im.height)).Contains(p)

[Bob Powell [MVP]]

Check out my article on backtracking the mouse in Windows Forms Tips and
Tricks.

--
Bob Powell [MVP]
Visual C#, System.Drawing

Ramuseco Limited .NET consulting
http://www.ramuseco.com

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http://www.bobpowell.net/tipstricks.htm

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"Rob T" <RT*********@DONTwalchemSPAM.com> wrote in message
news:ua**************@tk2msftngp13.phx.gbl...

Hi.

I have a program that creates an image and displays it to the
screen....pretty simple. I put it into a matrix so that I can rotate it.
I would also like to be able to know when I click on it so I am doing a
rectangle.contains. This works fine if the image isn't rotated. But if
it is, how can I get the rectangle.contains to rotate also? Thanks.

Dim im As Bitmap
im = bar.BuildMyImage
Dim mx As New Matrix
mx.Translate(StartPos.X, StartPos.Y)
mx.Rotate(Rotation)
G.Transform = mx
G.DrawImage(im, 0, 0, im.Width ,im.Height)
G.ResetTransform()

In my mouse onclick event:

Return New Rectangle(New Point(X1, Y1), New Size(im.width,
im.height)).Contains(p)