/// <summary>
/// Initialize this instance.
/// </summary>
private void Initialize() {
this.WantsLayer = true;
this.LayerContentsRedrawPolicy = NSViewLayerContentsRedrawPolicy.OnSetNeedsDisplay;
// --------------------------------------------------------------------------------
// Handle mouse with Gesture Recognizers.
// NOTE: Use either this method or the Override Methods, NOT both!
// --------------------------------------------------------------------------------
var click = new NSClickGestureRecognizer (() => {
FlipSwitchState();
});
AddGestureRecognizer (click);
}
void OnClick(object annotationObject, NSClickGestureRecognizer recognizer)
#endif
{
// https://bugzilla.xamarin.com/show_bug.cgi?id=26416
NSObject annotation = Runtime.GetNSObject(((IMKAnnotation)annotationObject).Handle);
if (annotation == null)
{
return;
}
// lookup pin
Pin targetPin = null;
for (var i = 0; i < _map.Pins.Count; i++)
{
Pin pin = _map.Pins[i];
object target = pin.Id;
if (target != annotation)
{
continue;
}
targetPin = pin;
break;
}
// pin not found. Must have been activated outside of forms
if (targetPin == null)
{
return;
}
// if the tap happened on the annotation view itself, skip because this is what happens when the callout is showing
// when the callout is already visible the tap comes in on a different view
if (_lastTouchedView is MKAnnotationView)
{
return;
}
targetPin.SendTap();
}
private void CreateAttributedString(NSTextField control, string html)
{
var attr = new NSAttributedString(html);
var links = new List <LinkData>();
control.AttributedStringValue = attr;
// Sets up a Gesture recognizer:
if (links.Count <= 0)
{
return;
}
var tapGesture = new NSClickGestureRecognizer((tap) =>
{
var url = DetectTappedUrl(tap, (NSTextField)tap.View, links);
if (url == null)
{
return;
}
var label = (HtmlLabel)Element;
var args = new WebNavigatingEventArgs(WebNavigationEvent.NewPage, new UrlWebViewSource {
Url = url
},
url);
label.SendNavigating(args);
if (args.Cancel)
{
return;
}
Device.OpenUri(new Uri(url));
label.SendNavigated(args);
});
control.AddGestureRecognizer(tapGesture);
}
public TabButton(IHostResourceProvider hostResource, string imageName)
{
if (hostResource == null)
{
throw new ArgumentNullException(nameof(hostResource));
}
if (imageName == null)
{
throw new ArgumentNullException(nameof(imageName));
}
Bordered = false;
Action = new ObjCRuntime.Selector(ClickedName);
var clicked = new NSClickGestureRecognizer(OnClicked);
AddGestureRecognizer(clicked);
this.hostResource = hostResource;
this.imageName = imageName;
ViewDidChangeEffectiveAppearance();
}
private string DetectTappedUrl(NSClickGestureRecognizer tap, NSTextField label, IEnumerable <LinkData> linkList)
{
// Creates instances of NSLayoutManager, NSTextContainer and NSTextStorage
var layoutManager = new NSLayoutManager();
var textContainer = new NSTextContainer();
var textStorage = new NSTextStorage();
textStorage.SetString(label.AttributedStringValue);
// Configures layoutManager and textStorage
layoutManager.AddTextContainer(textContainer);
textStorage.AddLayoutManager(layoutManager);
// Configures textContainer
textContainer.LineFragmentPadding = 0;
textContainer.LineBreakMode = label.LineBreakMode;
textContainer.MaximumNumberOfLines = (nuint)label.MaximumNumberOfLines;
var labelSize = label.Bounds.Size;
textContainer.Size = labelSize;
// Finds the tapped character location and compare it to the specified range
var locationOfTouchInLabel = tap.LocationInView(label);
var textBoundingBox = layoutManager.GetUsedRectForTextContainer(textContainer);
var textContainerOffset = new CGPoint(
(labelSize.Width - textBoundingBox.Size.Width) * 0.0 - textBoundingBox.Location.X,
(labelSize.Height - textBoundingBox.Size.Height) * 0.0 - textBoundingBox.Location.Y);
nfloat labelX;
switch (Element.HorizontalTextAlignment)
{
case TextAlignment.End:
labelX = locationOfTouchInLabel.X - (labelSize.Width - textBoundingBox.Size.Width);
break;
case TextAlignment.Center:
labelX = locationOfTouchInLabel.X - (labelSize.Width - textBoundingBox.Size.Width) / 2;
break;
default:
labelX = locationOfTouchInLabel.X;
break;
}
var locationOfTouchInTextContainer = new CGPoint(labelX - textContainerOffset.X,
locationOfTouchInLabel.Y - textContainerOffset.Y);
nfloat partialFraction = 0;
var indexOfCharacter = (nint)layoutManager.CharacterIndexForPoint(locationOfTouchInTextContainer,
textContainer, ref partialFraction);
nint scaledIndexOfCharacter = 0;
// Problem is that method CharacterIndexForPoint always returns index based on UILabel font
// ".SFUIText" which is the default Helvetica iOS font
// HACK is to scale indexOfCharacter for 13% because NeoSans-Light is narrower font than ".SFUIText"
if (label.Font.FontName == "NeoSans-Light")
{
scaledIndexOfCharacter = (nint)(indexOfCharacter * 1.13);
}
// HelveticaNeue font family works perfect until character position in the string is more than 2000 chars
// some uncosnsistent behaviour
// if string has <b> tag than label.Font.Name from HelveticaNeue-Thin goes to HelveticaNeue-Bold
if (label.Font.FontName.StartsWith("HelveticaNeue", StringComparison.InvariantCulture))
{
scaledIndexOfCharacter = (nint)(indexOfCharacter * 1.02);
}
foreach (var link in linkList)
{
var rangeLength = link.Range.Length;
var tolerance = 0;
if (label.Font.FontName == "NeoSans-Light")
{
rangeLength = (nint)(rangeLength * 1.13);
tolerance = 25;
indexOfCharacter = scaledIndexOfCharacter;
}
if (label.Font.FontName.StartsWith("HelveticaNeue", StringComparison.InvariantCulture))
{
if (link.Range.Location > 2000)
{
indexOfCharacter = scaledIndexOfCharacter;
}
}
// Xamarin version of NSLocationInRange?
if ((indexOfCharacter >= (link.Range.Location - tolerance)) &&
(indexOfCharacter < (link.Range.Location + rangeLength + tolerance)))
{
return(link.Url);
}
}
return(null);
}
private void OnBackgroundTap(NSClickGestureRecognizer e)
{
CurrentElement.SendBackgroundClick();
}