static void OnIsDeleteButtonEnabledPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs?e = null)
{
// TODO: cache the buttonStates and buttonVisibleState values on the textBox
var element = d as FrameworkElement;
VisualStateGroup?buttonStates = null;
VisualState? buttonVisibleState = null;
var deleteButton = element?.GetDescendantByName <Button>(DeleteButtonElementName);
if (deleteButton?.Parent is Grid rootGrid)
{
(buttonStates, buttonVisibleState) = InterceptDeleteButtonVisualStates(rootGrid);
}
var states = buttonStates?.States;
if (element is not null && states is not null && buttonVisibleState is not null)
{
var isEnabled = GetIsDeleteButtonEnabled(element);
var contains = states.Contains(buttonVisibleState);
if (isEnabled && !contains)
{
states.Add(buttonVisibleState);
}
else if (!isEnabled && contains)
{
states.Remove(buttonVisibleState);
}
}
}
/// <summary>
/// Update the IsEnabled value of the UIElement
/// </summary>
/// <param name="uiElement">UIElement</param>
/// <param name="dependencyPropertyChangedEventArgs">DependencyPropertyChangedEventArgs</param>
protected override void Update(UIElement uiElement, DependencyPropertyChangedEventArgs?dependencyPropertyChangedEventArgs)
{
var permissions = GetPermissions(uiElement);
var permissionsOperation = GetPermissionsOperations(uiElement);
uiElement.IsEnabled = HasPermissions(permissions, permissionsOperation)
? GetWhenPermissions(uiElement)
: GetWhenPermissionsMissing(uiElement);
}
/// <inheritdoc />
public void Update(DependencyPropertyChangedEventArgs?dependencyPropertyChangedEventArgs)
{
var host = GetHost();
if (host != null)
{
Update(host, dependencyPropertyChangedEventArgs);
}
}
static void OnIsReadOnlyPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs?e = null)
{
var element = d as FrameworkElement;
var textBox = element?.GetDescendantByName <TextBox>("TextBox");
if (textBox != null)
{
textBox.IsReadOnly = true;
}
}
static void OnVerticalTextAlignmentPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs?e = null)
{
// TODO: cache the scrollViewer value on the textBox
var element = d as FrameworkElement;
var scrollViewer = element?.GetDescendantByName <ScrollViewer>(ContentElementName);
if (scrollViewer is not null)
{
scrollViewer.VerticalAlignment = GetVerticalTextAlignment(d);
}
}
private void OnPropertyChanged(ManagedWeakReference?instance, DependencyProperty property, DependencyPropertyChangedEventArgs?args)
{
if (_svgElement == null)
{
return;
}
if (property == CenterProperty)
{
var center = Center;
_svgElement.SetAttribute(
("cx", center.X.ToStringInvariant()),
("cy", center.Y.ToStringInvariant()));
_svgElement.InvalidateMeasure();
}
else if (property == RadiusXProperty)
{
_svgElement.SetAttribute("rx", RadiusX.ToStringInvariant());
_svgElement.InvalidateMeasure();
}
else if (property == RadiusYProperty)
{
_svgElement.SetAttribute("ry", RadiusY.ToStringInvariant());
_svgElement.InvalidateMeasure();
}
}
protected override void Update(UIElement uiElement, DependencyPropertyChangedEventArgs?dependencyPropertyChangedEventArgs)
{
uiElement.Visibility = GetValue(uiElement) ? GetWhenTrue(uiElement) : GetWhenFalse(uiElement);
}
protected override void Update(UIElement uiElement, DependencyPropertyChangedEventArgs?dependencyPropertyChangedEventArgs)
{
_enumCheck.Update(GetValue(uiElement), GetTargetValue(uiElement));
uiElement.Visibility = _enumCheck.IsMatch ? GetWhenMatched(uiElement) : GetWhenNotMatched(uiElement);
}
protected override void Update(UIElement uiElement, DependencyPropertyChangedEventArgs?dependencyPropertyChangedEventArgs)
{
uiElement.Visibility = GetValue(uiElement) == null
? GetWhenNull(uiElement)
: GetWhenNotNull(uiElement);
}
/// <summary> /// Let the behavior update it's "stuffT for the specified host /// </summary> /// <param name="uiElement">THost which extends DependencyObject</param> /// <param name="dependencyPropertyChangedEventArgs">DependencyPropertyChangedEventArgs</param> protected abstract void Update(THost uiElement, DependencyPropertyChangedEventArgs?dependencyPropertyChangedEventArgs);
private void OnPropertyChanged(ManagedWeakReference?instance, DependencyProperty property, DependencyPropertyChangedEventArgs?args)
{
if (_svgElement == null)
{
return;
}
if (property == StartPointProperty)
{
var point = StartPoint;
_svgElement.SetAttribute(
("x1", point.X.ToStringInvariant()),
("y1", point.Y.ToStringInvariant()));
}
else if (property == EndPointProperty)
{
var point = EndPoint;
_svgElement.SetAttribute(
("x2", point.X.ToStringInvariant()),
("y2", point.Y.ToStringInvariant()));
}
}
private void OnPropertyChanged(ManagedWeakReference?instance, DependencyProperty property, DependencyPropertyChangedEventArgs?args)
{
if (_svgElement == null)
{
return;
}
if (property == FillRuleProperty)
{
var rule = FillRule switch
{
FillRule.EvenOdd => "evenodd",
FillRule.Nonzero => "nonzero",
_ => "evenodd"
};
_svgElement.SetAttribute("fill-rule", rule);
}
else if (property == ChildrenProperty)
{
_svgElement.ClearChildren();
if (args?.OldValue is GeometryCollection oldGeometries)
{
oldGeometries.VectorChanged -= OnGeometriesChanged;
}
if ((args?.NewValue ?? Children) is GeometryCollection newGeometries)
{
newGeometries.VectorChanged += OnGeometriesChanged;
newGeometries.SetParent(this);
foreach (var child in newGeometries)
{
_svgElement.AddChild(child.GetSvgElement());
}
}
}
}
protected override void Update(FrameworkElement uiElement, DependencyPropertyChangedEventArgs?dependencyPropertyChangedEventArgs)
{
if (uiElement == null)
{
return;
}
// For user controls, find the parent - parent
while (typeof(UserControl).IsAssignableFrom(uiElement.GetType().BaseType))
{
if (!(uiElement.Parent is FrameworkElement parentUiElement))
{
break;
}
uiElement = parentUiElement;
}
if (!uiElement.IsLoaded)
{
// If the host is not loaded, wait until it is.
var target = uiElement.IsLoaded ? _icon : uiElement;
var handlers = new RoutedEventHandler[1];
handlers[0] = (sender, args) =>
{
Update(uiElement, dependencyPropertyChangedEventArgs);
target.Loaded -= handlers[0];
};
target.Loaded += handlers[0];
return;
}
var iconProperty = GetTargetValue(uiElement);
var propertyInfo = uiElement.GetType().GetProperty(iconProperty);
if (propertyInfo == null)
{
return;
}
if (propertyInfo.PropertyType == typeof(ImageSource))
{
// Icon is of type ImageSource
var image = propertyInfo.GetValue(uiElement) as ImageSource;
// Default size for the icon
var size = new Size(256, 256);
if (image != null)
{
size = new Size(image.Width, image.Height);
}
var iconIcon = _icon.ToBitmapSource(size);
propertyInfo.SetValue(uiElement, iconIcon);
}
else if (propertyInfo.PropertyType == typeof(Icon))
{
// Icon is of type System.Drawing.Icon
propertyInfo.SetValue(uiElement, _icon.ToIcon());
}
else
{
Log.Error().WriteLine("Unknown type for Icon property: {0}", propertyInfo.PropertyType);
}
}