public override void LayoutSubviews()
{
const int ThinPad = 3;
const int ThickPad = 10;
const int LineHeight = 1;
var w = Frame.Width;
var h = Frame.Height;
SignaturePrompt.SizeToFit();
ClearLabel.SizeToFit();
var captionHeight = Caption.SizeThatFits(Caption.Frame.Size).Height;
var clearButtonHeight = (int)ClearLabel.Font.LineHeight + 1;
var rect = new CGRect(0, 0, w, h);
SignaturePadCanvas.Frame = rect;
BackgroundImageView.Frame = rect;
var top = h;
top = top - ThinPad - captionHeight;
Caption.Frame = new CGRect(ThickPad, top, w - ThickPad - ThickPad, captionHeight);
top = top - ThinPad - SignatureLine.Frame.Height;
SignatureLine.Frame = new CGRect(ThickPad, top, w - ThickPad - ThickPad, LineHeight);
top = top - ThinPad - SignaturePrompt.Frame.Height;
SignaturePrompt.Frame = new CGRect(ThickPad, top, SignaturePrompt.Frame.Width, SignaturePrompt.Frame.Height);
ClearLabel.Frame = new CGRect(w - ThickPad - ClearLabel.Frame.Width, ThickPad, ClearLabel.Frame.Width, clearButtonHeight);
}
void Initialize(bool baseProperties = true)
{
if (baseProperties)
{
BackgroundColor = UIColor.FromRGB(225, 225, 225);
}
strokeColor = UIColor.Black;
StrokeWidth = 2f;
Layer.ShadowColor = UIColor.Black.CGColor;
Layer.ShadowOffset = new CGSize(2, 2);
Layer.ShadowOpacity = 1f;
Layer.ShadowRadius = 2f;
#region Add Subviews
BackgroundImageView = new UIImageView();
AddSubview(BackgroundImageView);
//Add an image that covers the entire signature view, used to display already drawn
//elements instead of having to redraw them every time the user touches the screen.
imageView = new UIImageView();
AddSubview(imageView);
Caption = new UILabel();
Caption.Text = "Sign here.";
Caption.Font = UIFont.BoldSystemFontOfSize(11f);
Caption.BackgroundColor = UIColor.Clear;
Caption.TextColor = UIColor.Gray;
Caption.TextAlignment = UITextAlignment.Center;
AddSubview(Caption);
//Display the base line for the user to sign on.
SignatureLine = new UIView();
SignatureLine.BackgroundColor = UIColor.Gray;
AddSubview(SignatureLine);
//Display the X on the left hand side of the line where the user signs.
SignaturePrompt = new UILabel();
SignaturePrompt.Text = "X";
SignaturePrompt.Font = UIFont.BoldSystemFontOfSize(20f);
SignaturePrompt.BackgroundColor = UIColor.Clear;
SignaturePrompt.TextColor = UIColor.Gray;
AddSubview(SignaturePrompt);
ClearLabel = UIButton.FromType(UIButtonType.Custom);
ClearLabel.SetTitle("Clear", UIControlState.Normal);
ClearLabel.Font = UIFont.BoldSystemFontOfSize(11f);
ClearLabel.BackgroundColor = UIColor.Clear;
ClearLabel.SetTitleColor(UIColor.Gray, UIControlState.Normal);
//btn_clear.SetBackgroundImage (UIImage.FromFile ("Images/closebox.png"), UIControlState.Normal);
//btn_clear.SetBackgroundImage (UIImage.FromFile ("Images/closebox_pressed.png"),
// UIControlState.Selected);
ClearLabel.TouchUpInside += (sender, e) => {
Clear();
};
AddSubview(ClearLabel);
ClearLabel.Hidden = true;
#endregion
paths = new List <UIBezierPath> ();
points = new List <CGPoint[]> ();
currentPoints = new List <CGPoint> ();
}
private void Initialize(bool baseProperties = true)
{
// add the background view
{
BackgroundImageView = new UIImageView();
AddSubview(BackgroundImageView);
}
// add the main signature view
{
SignaturePadCanvas = new SignaturePadCanvasView();
SignaturePadCanvas.StrokeCompleted += (sender, e) =>
{
UpdateUi();
StrokeCompleted?.Invoke(this, EventArgs.Empty);
};
SignaturePadCanvas.Cleared += (sender, e) => Cleared?.Invoke(this, EventArgs.Empty);
AddSubview(SignaturePadCanvas);
}
// add the caption
{
Caption = new UILabel()
{
Text = "Sign here.",
Font = UIFont.BoldSystemFontOfSize(11f),
BackgroundColor = UIColor.Clear,
TextColor = UIColor.Gray,
TextAlignment = UITextAlignment.Center
};
AddSubview(Caption);
}
// add the signature line
{
SignatureLine = new UIView()
{
BackgroundColor = UIColor.Gray
};
AddSubview(SignatureLine);
}
// add the prompt
{
SignaturePrompt = new UILabel()
{
Text = "X",
Font = UIFont.BoldSystemFontOfSize(20f),
BackgroundColor = UIColor.Clear,
TextColor = UIColor.Gray
};
AddSubview(SignaturePrompt);
}
// add the clear label
{
ClearLabel = UIButton.FromType(UIButtonType.Custom);
ClearLabel.SetTitle("Clear", UIControlState.Normal);
ClearLabel.Font = UIFont.BoldSystemFontOfSize(11f);
ClearLabel.BackgroundColor = UIColor.Clear;
ClearLabel.SetTitleColor(UIColor.Gray, UIControlState.Normal);
AddSubview(ClearLabel);
// attach the "clear" command
ClearLabel.TouchUpInside += (sender, e) => Clear();
}
// clear / initialize the view
Clear();
}
private void Initialize(bool baseProperties = true)
{
// add the background view
{
BackgroundImageView = new UIImageView();
AddSubview(BackgroundImageView);
}
// add the main signature view
{
SignaturePadCanvas = new SignaturePadCanvasView();
SignaturePadCanvas.StrokeCompleted += delegate
{
OnSignatureStrokeCompleted();
};
SignaturePadCanvas.DblTapped += delegate
{
OnDoubleTapped();
};
SignaturePadCanvas.Cleared += delegate
{
OnSignatureCleared();
};
AddSubview(SignaturePadCanvas);
}
// add the caption
{
Caption = new UILabel()
{
BackgroundColor = UIColor.Clear,
TextAlignment = UITextAlignment.Center,
Font = UIFont.SystemFontOfSize(DefaultFontSize),
Text = DefaultCaptionText,
TextColor = SignaturePadDarkColor,
};
AddSubview(Caption);
}
// add the signature line
{
SignatureLine = new UIView()
{
BackgroundColor = SignaturePadDarkColor,
};
SignatureLineWidth = DefaultLineThickness;
SignatureLineSpacing = DefaultNarrowSpacing;
AddSubview(SignatureLine);
}
// add the prompt
{
SignaturePrompt = new UILabel()
{
BackgroundColor = UIColor.Clear,
Font = UIFont.BoldSystemFontOfSize(DefaultFontSize),
Text = DefaultPromptText,
TextColor = SignaturePadDarkColor,
};
AddSubview(SignaturePrompt);
}
// add the clear label
{
ClearLabel = UIButton.FromType(UIButtonType.Custom);
ClearLabel.BackgroundColor = UIColor.Clear;
ClearLabel.Font = UIFont.BoldSystemFontOfSize(DefaultFontSize);
ClearLabel.SetTitle(DefaultClearLabelText, UIControlState.Normal);
ClearLabel.SetTitleColor(SignaturePadDarkColor, UIControlState.Normal);
AddSubview(ClearLabel);
// attach the "clear" command
ClearLabel.TouchUpInside += delegate
{
OnClearTapped();
};
}
Padding = new UIEdgeInsets(DefaultWideSpacing, DefaultWideSpacing, DefaultNarrowSpacing, DefaultWideSpacing);
// clear / initialize the view
UpdateUi();
}
