public override void OnDestroy()
{
base.OnDestroy();
// force our image view to release its references to our bitmaps
ImageView.SetImageBitmap(null);
// free the resources we're done with
if (SourceImage != null)
{
SourceImage.Dispose( );
SourceImage = null;
}
if (ScaledCroppedImage != null)
{
ScaledCroppedImage.Dispose( );
ScaledCroppedImage = null;
}
if (ScaledSourceImage != null)
{
ScaledSourceImage.Dispose( );
ScaledSourceImage = null;
}
// free the cropped image
if (CroppedImage != null)
{
CroppedImage.Dispose( );
CroppedImage = null;
}
SetMode(CropMode.None);
}
void SetMode(CropMode mode)
{
if (mode == Mode)
{
throw new Exception(string.Format("Crop Mode {0} requested, but already in that mode.", mode));
}
switch (mode)
{
case CropMode.Editing:
{
// If we're entering edit mode for the first time
if (Mode == CropMode.None)
{
// Animate in the mask
SimpleAnimator_Float floatAnimator = new SimpleAnimator_Float(MaskLayer.Opacity, MaskFadeAmount, MaskFadeTime,
delegate(float percent, object value)
{
Rock.Mobile.Threading.Util.PerformOnUIThread(delegate
{
MaskLayer.Opacity = (float)value;
});
},
null);
floatAnimator.Start( );
// turn on our cropper
CropView.Visibility = ViewStates.Visible;
// and set the source image to the scaled source.
ImageView.SetImageBitmap(ScaledSourceImage);
}
// else we're coming FROM Preview Mode, so we need to animate
else
{
Animating = true;
// setup the dimension changes
System.Drawing.SizeF startSize = new System.Drawing.SizeF(ImageView.Width, ImageView.Height);
System.Drawing.SizeF endSize = new System.Drawing.SizeF(CropView.Width, CropView.Height);
PointF startPos = new PointF(ImageView.GetX( ), ImageView.GetY( ));
PointF endPos = new PointF(CropView.GetX( ), CropView.GetY( ));
// now animate the cropped image up to its full size
AnimateImageView(ImageView, startPos, endPos, startSize, endSize, ImageAnimationTime,
delegate
{
ImageView.SetImageBitmap(null);
// release any cropped image we had.
if (CroppedImage != null)
{
CroppedImage.Dispose( );
CroppedImage = null;
}
// release the scaled version if we had it
if (ScaledCroppedImage != null)
{
ScaledCroppedImage.Dispose( );
ScaledCroppedImage = null;
}
ImageView.SetImageBitmap(ScaledSourceImage);
ImageView.LayoutParameters.Width = ScaledSourceImage.Width;
ImageView.LayoutParameters.Height = ScaledSourceImage.Height;
// center the image
ImageView.SetX((ScreenSize.Width - ImageView.LayoutParameters.Width) / 2);
ImageView.SetY((ScreenSize.Height - ImageView.LayoutParameters.Height) / 2);
MaskLayer.Visibility = ViewStates.Visible;
CropView.Visibility = ViewStates.Visible;
SimpleAnimator_Float floatAnimator = new SimpleAnimator_Float(MaskLayer.Opacity, MaskFadeAmount, MaskFadeTime,
delegate(float percent, object value)
{
Rock.Mobile.Threading.Util.PerformOnUIThread(delegate
{
MaskLayer.Opacity = (float)value;
CropView.Alpha = percent;
});
},
// FINISHED MASK FADE-OUT
delegate
{
Rock.Mobile.Threading.Util.PerformOnUIThread(delegate
{
Animating = false;
});
});
floatAnimator.Start( );
});
}
break;
}
case CropMode.Previewing:
{
// don't allow a state change while we're animating
Animating = true;
SimpleAnimator_Float floatAnimator = new SimpleAnimator_Float(MaskLayer.Opacity, 1.00f, MaskFadeTime,
delegate(float percent, object value)
{
Rock.Mobile.Threading.Util.PerformOnUIThread(delegate
{
MaskLayer.Opacity = (float)value;
CropView.Alpha = 1.0f - percent;
});
},
// FINISHED MASK FADE-IN
delegate
{
Rock.Mobile.Threading.Util.PerformOnUIThread(delegate
{
// hide the mask and cropper
MaskLayer.Visibility = ViewStates.Gone;
CropView.Visibility = ViewStates.Gone;
// create the cropped image
CroppedImage = CropImage(SourceImage, new System.Drawing.RectangleF(CropView.GetX( ) - CropViewMinPos.X,
CropView.GetY( ) - CropViewMinPos.Y,
CropView.LayoutParameters.Width,
CropView.LayoutParameters.Height));
// create a scaled version of the cropped image
float scaledWidth = (float)CroppedImage.Width * (1.0f / ScreenToImageScalar);
float scaledHeight = (float)CroppedImage.Height * (1.0f / ScreenToImageScalar);
ScaledCroppedImage = Bitmap.CreateScaledBitmap(CroppedImage, (int)scaledWidth, (int)scaledHeight, false);
// set the scaled cropped image
ImageView.SetImageBitmap(null);
ImageView.SetImageBitmap(ScaledCroppedImage);
// start the scaled cropped image scaled down further to match its size within the full image.
ImageView.SetX(CropView.GetX( ));
ImageView.SetY(CropView.GetY( ));
ImageView.LayoutParameters.Width = CropView.Width;
ImageView.LayoutParameters.Height = CropView.Height;
// setup the dimension changes
System.Drawing.SizeF startSize = new System.Drawing.SizeF(ScaledCroppedImage.Width, ScaledCroppedImage.Height);
System.Drawing.SizeF endSize;
if (ScreenSize.Width < ScreenSize.Height)
{
endSize = new System.Drawing.SizeF(ScreenSize.Width, (float)System.Math.Ceiling(ScreenSize.Width * (startSize.Width / startSize.Height)));
}
else
{
endSize = new System.Drawing.SizeF((float)System.Math.Ceiling(ScreenSize.Height * (startSize.Height / startSize.Width)), ScreenSize.Height);
}
PointF startPos = new PointF(CropView.GetX( ), CropView.GetY( ));
PointF endPos = new PointF((ScreenSize.Width - endSize.Width) / 2, (ScreenSize.Height - endSize.Height) / 2);
// now animate the cropped image up to its full size
AnimateImageView(ImageView, startPos, endPos, startSize, endSize, ImageAnimationTime,
delegate
{
Animating = false;
});
});
});
floatAnimator.Start( );
break;
}
}
Mode = mode;
}
