public override void ViewDidLoad()
{
base.ViewDidLoad();
screenSize = UIScreen.MainScreen.Bounds.Size;
mainContainer = new UIView();
mainContainer.Frame = new CGRect(0, 0, screenSize.Width, screenSize.Height);
mainContainer.BackgroundColor = UIColor.Black;
this.View.AddSubview(mainContainer);
double maxWidth = screenSize.Width;
double maxHeight = screenSize.Height;
// Bottom Bar, which will contain the controlls
UIView bottomBar = new UIView();
bottomBar.Frame = new CGRect(0, screenSize.Height - 70, screenSize.Width, 50);
bottomBar.BackgroundColor = UIColor.Black;
mainContainer.AddSubview(bottomBar);
// Adding Items to bottom bar
var btnCancel = new UIButton(new CGRect(30, 10, 100, 30));
btnCancel.SetTitle("Cancel", UIControlState.Normal);
btnCancel.SetTitleColor(UIColor.White, UIControlState.Normal);
btnCancel.BackgroundColor = UIColor.Clear;
btnCancel.TouchUpInside += async(s, e) =>
{
await this.DismissViewControllerAsync(true);
_callback?.Invoke(false);
};
bottomBar.AddSubview(btnCancel);
UIButton rotationButton = new UIButton();
image = new UIImage("rotate_button.png");
rotationButton.Frame = new CGRect(screenSize.Width / 2 - 40, 10, 80, 30);
rotationButton.SetImage(image, UIControlState.Normal);
rotationButton.AddTarget((s, e) => { RotateImageTapped(); }, UIControlEvent.TouchUpInside);
bottomBar.AddSubview(rotationButton);
var btnSave = new UIButton(new CGRect(screenSize.Width - 120, 10, 100, 30));
btnSave.SetTitle("Save", UIControlState.Normal);
btnSave.SetTitleColor(UIColor.White, UIControlState.Normal);
btnSave.BackgroundColor = UIColor.Clear;
btnSave.TouchUpInside += Crop;
bottomBar.AddSubview(btnSave);
if (ImagePath == null)
{
return;
}
using (var image = UIImage.FromFile(ImagePath))
{
imageWidth = Math.Min(image.Size.Width, maxWidth);
imageHeight = imageWidth * image.Size.Height / image.Size.Width;
mainImageView = new UIImageView(new CGRect(0, ((screenSize.Height - 70) - imageHeight) / 2, imageWidth, imageHeight));
mainImageView.Image = image;
xRatio = image.Size.Width / imageWidth;
yRatio = image.Size.Height / imageHeight;
}
double cropW = Math.Min(imageWidth, imageHeight) > 300 ? 300 : 200;
cropperView = new CropperView((imageWidth - cropW) / 2, (imageHeight - cropW) / 2, cropW, cropW)
{
Frame = mainImageView.Frame
};
mainContainer.AddSubviews(mainImageView, cropperView);
nfloat dx = 0;
nfloat dy = 0;
pan = new UIPanGestureRecognizer(() =>
{
if ((pan.State == UIGestureRecognizerState.Began || pan.State == UIGestureRecognizerState.Changed) && (pan.NumberOfTouches == 1))
{
var p0 = pan.LocationInView(View);
if (dx == 0)
{
dx = p0.X - cropperView.Origin.X;
}
if (dy == 0)
{
dy = p0.Y - cropperView.Origin.Y;
}
var p1 = new CGPoint(p0.X - dx, p0.Y - dy);
cropperView.Origin = p1;
}
else if (pan.State == UIGestureRecognizerState.Ended)
{
dx = 0;
dy = 0;
}
});
nfloat s0 = 1;
pinch = new UIPinchGestureRecognizer(() =>
{
nfloat s = pinch.Scale;
nfloat ds = (nfloat)Math.Abs(s - s0);
nfloat sf = 0;
const float rate = 0.5f;
if (s >= s0)
{
sf = 1 + ds * rate;
}
else if (s < s0)
{
sf = 1 - ds * rate;
}
s0 = s;
cropperView.CropSize = new CGSize(cropperView.CropSize.Width * sf, cropperView.CropSize.Height * sf);
if (pinch.State == UIGestureRecognizerState.Ended)
{
s0 = 1;
}
});
cropperView.AddGestureRecognizer(pan);
cropperView.AddGestureRecognizer(pinch);
}
public void ReLoadView(bool roate)
{
cropperView = new CropperView((imageHeight - 200) / 2, (imageWidth - 200) / 2, 200, 200)
{
Frame = mainImageView.Frame
};
mainContainer.AddSubviews(mainImageView, cropperView);
nfloat dx = 0;
nfloat dy = 0;
pan = new UIPanGestureRecognizer(() =>
{
if ((pan.State == UIGestureRecognizerState.Began || pan.State == UIGestureRecognizerState.Changed) && (pan.NumberOfTouches == 1))
{
var p0 = pan.LocationInView(View);
if (dx == 0)
{
dx = p0.X - cropperView.Origin.X;
}
if (dy == 0)
{
dy = p0.Y - cropperView.Origin.Y;
}
var p1 = new CGPoint(p0.X - dx, p0.Y - dy);
cropperView.Origin = p1;
}
else if (pan.State == UIGestureRecognizerState.Ended)
{
dx = 0;
dy = 0;
}
});
nfloat s0 = 1;
pinch = new UIPinchGestureRecognizer(() =>
{
nfloat s = pinch.Scale;
nfloat ds = (nfloat)Math.Abs(s - s0);
nfloat sf = 0;
const float rate = 0.5f;
if (s >= s0)
{
sf = 1 + ds * rate;
}
else if (s < s0)
{
sf = 1 - ds * rate;
}
s0 = s;
cropperView.CropSize = new CGSize(cropperView.CropSize.Width * sf, cropperView.CropSize.Height * sf);
if (pinch.State == UIGestureRecognizerState.Ended)
{
s0 = 1;
}
});
cropperView.AddGestureRecognizer(pan);
cropperView.AddGestureRecognizer(pinch);
}
