private void PanOrTapValue(UIGestureRecognizer recognizer)
{
var center = new PointF(this.Bounds.Width / 2f, this.Bounds.Height / 2f);
switch (recognizer.State)
{
case UIGestureRecognizerState.Began:
case UIGestureRecognizerState.Changed:
case UIGestureRecognizerState.Ended:
var point = recognizer.LocationInView(this);
var dx = point.X - center.X;
var dy = point.Y - center.Y;
//var distance = Math.Sqrt(dx * dx + dy * dy);
var angle = (float)Math.Atan2(-dy, -dx);
var h = (angle + (float)Math.PI) / (2f * (float)Math.PI);
this.Hue = h;
break;
case UIGestureRecognizerState.Failed:
case UIGestureRecognizerState.Cancelled:
break;
default:
break;
}
}
private void DrawBlankMiddleCircle()
{
var size = new SizeF(this.Bounds.Size.Width - 40f, this.Bounds.Size.Height - 40f);
UIGraphics.BeginImageContextWithOptions(size, false, 0f);
UIColor.Clear.SetFill();
UIGraphics.RectFill(new RectangleF(0f, 0f, size.Width, size.Height));
var radius = (nfloat)(Math.Min(size.Width, size.Height) / 2);
var angle = 2f * (float)Math.PI / 1;
var center = new PointF(size.Width / 2, size.Height / 2);
var bezierPath = UIBezierPath.FromArc(center, radius, 0, 1 * angle, true);
bezierPath.AddLineTo(center);
bezierPath.ClosePath();
var color = UIColor.FromRGB(83, 83, 83);
color.SetFill();
color.SetStroke();
bezierPath.Fill();
bezierPath.Stroke();
var img = UIGraphics.GetImageFromCurrentImageContext();
UIGraphics.EndImageContext();
img.Draw(new PointF(20f, 20f));
}
private void DrawHueCircle()
{
var size = new SizeF(this.Bounds.Size.Width, this.Bounds.Size.Height);
UIGraphics.BeginImageContextWithOptions(size, true, 0f);
UIColor.FromRGB(83, 83, 83).SetFill();
UIGraphics.RectFill(new RectangleF(0f, 0f, size.Width, size.Height));
var sectors = 180;
var radius = (nfloat)(Math.Min(size.Width, size.Height) / 2);
var angle = 2f * (float)Math.PI / sectors;
UIBezierPath bezierPath;
for (var i = 0; i < sectors; i++)
{
var center = new PointF(size.Width / 2, size.Height / 2);
bezierPath = UIBezierPath.FromArc(center, radius, i * angle, (i + 1) * angle, true);
bezierPath.AddLineTo(center);
bezierPath.ClosePath();
var color = UIColor.FromHSBA((float)i / sectors, 1f, 1f, 1f);
color.SetFill();
color.SetStroke();
bezierPath.Fill();
bezierPath.Stroke();
}
var img = UIGraphics.GetImageFromCurrentImageContext();
UIGraphics.EndImageContext();
img.Draw(new PointF(0f, 0f));
}
void AdjustAnchorPointForGestureRecognizer(UIGestureRecognizer gestureRecognizer)
{
if (gestureRecognizer.State == UIGestureRecognizerState.Began)
{
UIView piece = gestureRecognizer.View;
PointF locationInView = gestureRecognizer.LocationInView(piece);
PointF locationInSuperview = gestureRecognizer.LocationInView(piece.Superview);
piece.Layer.AnchorPoint = new PointF(locationInView.X / piece.Bounds.Size.Width, locationInView.Y / piece.Bounds.Size.Height);
piece.Center = locationInSuperview;
}
}
void PanGestureMoveAround(UIPanGestureRecognizer gesture)
{
UIView piece = gesture.View;
AdjustAnchorPointForGestureRecognizer(gesture);
if (gesture.State == UIGestureRecognizerState.Began || gesture.State == UIGestureRecognizerState.Changed)
{
PointF translation = gesture.TranslationInView(piece.Superview);
piece.Center = new PointF(piece.Center.X, piece.Center.Y + translation.Y);
gesture.SetTranslation(new PointF(0, 0), piece.Superview);
}
else if (gesture.State == UIGestureRecognizerState.Ended)
{
SlideAndFix(gesture);
}
}
public static PointF ToPointF(this global::CoreGraphics.CGPoint r)
{
return(new PointF((float)r.X, (float)r.Y));
}
public void HandleLongPressGesture(UILongPressGestureRecognizer recognizer)
{
var point = recognizer.LocationInView(_paletteView);
switch (recognizer.State)
{
case UIGestureRecognizerState.Began:
{
if (_currentView == null)
{
var touchedView = _paletteView.HitTest(point, null);
if (!touchedView.Equals(_paletteView))
{
UIView.Animate(0.5, () =>
{
_previousDeleteViewFrame = _deleteView.Frame;
var frame = _deleteView.Frame;
frame.Y = frame.Y - 190f;
_deleteView.Frame = frame;
_paletteView.BringSubviewToFront(_deleteView);
});
_paletteView.BringSubviewToFront(touchedView);
_currentView = touchedView;
_previousView = touchedView;
_previousPoint = touchedView.Center;
}
}
}
break;
case UIGestureRecognizerState.Changed:
{
if (_currentView != null)
{
var center = _currentView.Center;
center.X += point.X - _previousView.Center.X;
center.Y += point.Y - _previousView.Center.Y;
_currentView.Center = center;
}
}
break;
case UIGestureRecognizerState.Ended:
{
if (_currentView != null)
{
var deletePoint = recognizer.LocationInView(_deleteView);
if (_deleteView.Bounds.Contains(deletePoint))
{
var temp = _currentView.Layer.Sublayers.First().Name.Split(new char[] { '_' });
var index = int.Parse(temp[1]);
var color = _colors.ElementAt(index);
_colors.Remove(color.Key);
_favoriteColorManager.Delete(color.Key);
ClearColorGrid();
SetColorGrid();
}
_currentView.Center = _previousPoint;
_currentView = null;
UIView.Animate(0.5, () =>
{
_deleteView.Frame = _previousDeleteViewFrame;
});
}
}
break;
}
}
