protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
ExtendedEditorControl customControl = (ExtendedEditorControl)Element;
if (ExtendedEditorControl.PlaceholderProperty.PropertyName == e.PropertyName)
{
Control.Hint = customControl.Placeholder;
}
else if (ExtendedEditorControl.PlaceholderColorProperty.PropertyName == e.PropertyName)
{
Control.SetHintTextColor(customControl.PlaceholderColor.ToAndroid());
}
else if (ExtendedEditorControl.HasRoundedCornerProperty.PropertyName == e.PropertyName)
{
if (customControl.HasRoundedCorner)
{
ApplyBorder();
}
else
{
Control.Background = originalBackground;
}
}
}
protected override void OnElementChanged(ElementChangedEventArgs <Xamarin.Forms.Editor> e)
{
base.OnElementChanged(e);
if (Control != null)
{
if (initial)
{
originalBackground = Control.Background;
initial = false;
}
Control.SetMaxLines(5);
}
if (e.NewElement != null)
{
ExtendedEditorControl customControl = (ExtendedEditorControl)Element;
if (customControl.HasRoundedCorner)
{
ApplyBorder();
}
if (!string.IsNullOrEmpty(customControl.Placeholder))
{
Control.Hint = customControl.Placeholder;
Control.SetHintTextColor(customControl.PlaceholderColor.ToAndroid());
}
}
}
public void CreatePlaceholder()
{
ExtendedEditorControl element = Element as ExtendedEditorControl;
_placeholderLabel = new UILabel
{
Text = element?.Placeholder,
TextColor = element.PlaceholderColor.ToUIColor(),
BackgroundColor = UIColor.Clear
};
UIEdgeInsets edgeInsets = Control.TextContainerInset;
System.nfloat lineFragmentPadding = Control.TextContainer.LineFragmentPadding;
Control.AddSubview(_placeholderLabel);
NSLayoutConstraint[] vConstraints = NSLayoutConstraint.FromVisualFormat(
"V:|-" + edgeInsets.Top + "-[PlaceholderLabel]-" + edgeInsets.Bottom + "-|", 0, new NSDictionary(),
NSDictionary.FromObjectsAndKeys(
new NSObject[] { _placeholderLabel }, new NSObject[] { new NSString("PlaceholderLabel") })
);
NSLayoutConstraint[] hConstraints = NSLayoutConstraint.FromVisualFormat(
"H:|-" + lineFragmentPadding + "-[PlaceholderLabel]-" + lineFragmentPadding + "-|",
0, new NSDictionary(),
NSDictionary.FromObjectsAndKeys(
new NSObject[] { _placeholderLabel }, new NSObject[] { new NSString("PlaceholderLabel") })
);
_placeholderLabel.TranslatesAutoresizingMaskIntoConstraints = false;
Control.AddConstraints(hConstraints);
Control.AddConstraints(vConstraints);
}
protected override void OnElementChanged(ElementChangedEventArgs<Xamarin.Forms.Editor> e)
{
base.OnElementChanged(e);
if (Control != null)
{
if (_placeholderLabel == null)
{
CreatePlaceholder();
}
}
if (e.NewElement != null)
{
ExtendedEditorControl customControl = (ExtendedEditorControl)e.NewElement;
if (customControl.IsExpandable)
{
Control.ScrollEnabled = false;
}
else
{
Control.ScrollEnabled = true;
}
if (customControl.HasRoundedCorner)
{
Control.Layer.CornerRadius = 5;
}
else
{
Control.Layer.CornerRadius = 0;
}
Control.InputAccessoryView = new UIView(CGRect.Empty);
Control.ReloadInputViews();
}
if (e.OldElement != null)
{
}
}
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
ExtendedEditorControl customControl = (ExtendedEditorControl)Element;
if (e.PropertyName == Editor.TextProperty.PropertyName)
{
if (customControl.IsExpandable)
{
CGSize size = Control.Text.StringSize(Control.Font, Control.Frame.Size, UILineBreakMode.WordWrap);
int numLines = (int)(size.Height / Control.Font.LineHeight);
if (prevLines > numLines)
{
customControl.HeightRequest = -1;
}
else if (string.IsNullOrEmpty(Control.Text))
{
customControl.HeightRequest = -1;
}
prevLines = numLines;
}
_placeholderLabel.Hidden = !string.IsNullOrEmpty(Control.Text);
}
else if (ExtendedEditorControl.PlaceholderProperty.PropertyName == e.PropertyName)
{
_placeholderLabel.Text = customControl.Placeholder;
}
else if (ExtendedEditorControl.PlaceholderColorProperty.PropertyName == e.PropertyName)
{
_placeholderLabel.TextColor = customControl.PlaceholderColor.ToUIColor();
}
else if (ExtendedEditorControl.HasRoundedCornerProperty.PropertyName == e.PropertyName)
{
if (customControl.HasRoundedCorner)
{
Control.Layer.CornerRadius = 5;
}
else
{
Control.Layer.CornerRadius = 0;
}
}
else if (ExtendedEditorControl.IsExpandableProperty.PropertyName == e.PropertyName)
{
if (customControl.IsExpandable)
{
Control.ScrollEnabled = false;
}
else
{
Control.ScrollEnabled = true;
}
}
else if (ExtendedEditorControl.HeightProperty.PropertyName == e.PropertyName)
{
if (customControl.IsExpandable)
{
CGSize size = Control.Text.StringSize(Control.Font, Control.Frame.Size, UILineBreakMode.WordWrap);
int numLines = (int)(size.Height / Control.Font.LineHeight);
if (numLines >= 5)
{
Control.ScrollEnabled = true;
customControl.HeightRequest = previousHeight;
}
else
{
Control.ScrollEnabled = false;
previousHeight = customControl.Height;
}
}
}
}
