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Fixed rotate, also working on the BitmapContainer

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git-svn-id: http://svn.code.sf.net/p/greenshot/code/trunk@1680 7dccd23d-a4a3-4e1f-8c07-b4c1b4018ab4
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RKrom 2012-03-05 16:01:46 +00:00
parent 25f8d81d5a
commit 0bb7f87ee5
3 changed files with 62 additions and 38 deletions
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45
Greenshot/Drawing/DrawableContainer.cs
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@ -590,7 +590,50 @@ namespace Greenshot.Drawing {
}
Invalidate();
}
public virtual void Rotate(RotateFlipType rotateFlipType) {
// somehow the rotation is the wrong way?
int angle = 90;
if (RotateFlipType.Rotate90FlipNone == rotateFlipType) {
angle = 270;
}
int ox = 0;
int oy = 0;
int centerX = parent.Width >> 1;
int centerY = parent.Height >> 1;
// Transform from screen to normal coordinates
int px = Left - centerX;
int py = centerY - Top;
double theta = Math.PI * angle / 180.0;
double x1 = Math.Cos(theta) * (px - ox) - Math.Sin(theta) * (py - oy) + ox;
double y1 = Math.Sin(theta) * (px - ox) + Math.Cos(theta) * (py - oy) + oy;
// Transform from screen to normal coordinates
px = (Left + Width) - centerX;
py = centerY - (Top + Height);
double x2 = Math.Cos(theta) * (px - ox) - Math.Sin(theta) * (py - oy) + ox;
double y2 = Math.Sin(theta) * (px - ox) + Math.Cos(theta) * (py - oy) + oy;
// Transform back to screen coordinates, as we rotate the bitmap we need to switch the center X&Y
x1 += centerY;
y1 = centerX - y1;
x2 += centerY;
y2 = centerX - y2;
// Calculate to rectangle
double newWidth = x2 - x1;
double newHeight = y2 - y1;
RectangleF newRectangle = new RectangleF(
(float)x1,
(float)y1,
(float)newWidth,
(float)newHeight
);
ApplyBounds(newRectangle);
}
protected virtual ScaleHelper.IDoubleProcessor GetAngleRoundProcessor() {
return ScaleHelper.ShapeAngleRoundBehavior.Instance;
}