private static void AdornedElementChanged(PerspexPropertyChangedEventArgs e)
{
var adorner = (Visual)e.Sender;
var adorned = (Visual)e.NewValue;
var layer = adorner.GetVisualParent<AdornerLayer>();
layer?.UpdateAdornedElement(adorner, adorned);
}
/// <summary>
/// Caled when the <see cref="Items"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
protected virtual void ItemsChanged(PerspexPropertyChangedEventArgs e)
{
var incc = e.OldValue as INotifyCollectionChanged;
if (incc != null)
{
incc.CollectionChanged += ItemsCollectionChanged;
}
var newValue = e.NewValue as IEnumerable;
if (newValue == null || newValue.Count() == 0)
{
Classes.Add(":empty");
}
else
{
Classes.Remove(":empty");
}
incc = newValue as INotifyCollectionChanged;
if (incc != null)
{
incc.CollectionChanged += ItemsCollectionChanged;
}
}
/// <summary>
/// Called when the <see cref="SelectedIndex"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private void SelectedIndexChanged(PerspexPropertyChangedEventArgs e)
{
if (Panel != null)
{
var task = MoveToPage((int)e.OldValue, (int)e.NewValue);
}
}
/// <summary>
/// Handle when dependency property value changes to update the underline HtmlContainer with the new value.
/// </summary>
private static void OnPerspexProperty_valueChanged(PerspexObject PerspexObject, PerspexPropertyChangedEventArgs e)
{
var control = PerspexObject as HtmlLabel;
if (control != null)
{
if (e.Property == AutoSizeProperty)
{
if ((bool)e.NewValue)
{
PerspexObject.SetValue(AutoSizeHeightOnlyProperty, false);
control.InvalidateMeasure();
control.InvalidateVisual();
}
}
else if (e.Property == AutoSizeHeightOnlyProperty)
{
if ((bool)e.NewValue)
{
PerspexObject.SetValue(AutoSizeProperty, false);
control.InvalidateMeasure();
control.InvalidateVisual();
}
}
}
}
public void OnEvent(object sender, PerspexPropertyChangedEventArgs e)
{
if (e.Property == _property)
{
_changed.OnNext(e.NewValue);
}
}
/// <summary>
/// Calls <see cref="Layoutable.InvalidateArrange"/> on the parent of the control whose
/// property changed, if that parent is a canvas.
/// </summary>
/// <param name="e">The event args.</param>
private static void AffectsCanvasArrangeInvalidate(PerspexPropertyChangedEventArgs e)
{
var control = e.Sender as IControl;
var canvas = control?.Parent as Canvas;
canvas?.InvalidateArrange();
}
private void SelectedItemChanged(PerspexPropertyChangedEventArgs e)
{
var control = e.NewValue as IControl;
if (control != null)
{
control.Measure(Size.Infinity);
SelectionBoxItem = new Rectangle
{
Width = control.DesiredSize.Width,
Height = control.DesiredSize.Height,
Fill = new VisualBrush
{
Visual = control,
Stretch = Stretch.None,
AlignmentX = AlignmentX.Left,
}
};
}
else
{
SelectionBoxItem = e.NewValue;
}
}
/// <summary>
/// Called when the <see cref="Items"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private void ItemsChanged(PerspexPropertyChangedEventArgs e)
{
if (_createdPanel)
{
var generator = ItemContainerGenerator;
if (e.OldValue != null)
{
generator.Clear();
Panel.Children.Clear();
INotifyCollectionChanged incc = e.OldValue as INotifyCollectionChanged;
if (incc != null)
{
incc.CollectionChanged -= ItemsCollectionChanged;
}
}
if (Panel != null)
{
CreateItemsAndListenForChanges((IEnumerable)e.NewValue);
}
}
}
/// <summary>
/// Called when the <see cref="SelectedIndex"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private async void SelectedIndexChanged(PerspexPropertyChangedEventArgs e)
{
if (Panel != null)
{
if (_currentTransition == null)
{
int fromIndex = (int)e.OldValue;
int toIndex = (int)e.NewValue;
for (;;)
{
_currentTransition = MoveToPage(fromIndex, toIndex);
await _currentTransition;
if (_queuedTransitionIndex != -1)
{
fromIndex = toIndex;
toIndex = _queuedTransitionIndex;
_queuedTransitionIndex = -1;
}
else
{
_currentTransition = null;
break;
}
}
}
else
{
_queuedTransitionIndex = (int)e.NewValue;
}
}
}
/// <summary>
/// Called when the <see cref="SelectingItemsControl.SelectedIndex"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private void SelectedItemChanged(PerspexPropertyChangedEventArgs e)
{
var item = e.NewValue as IContentControl;
var content = item?.Content ?? item;
SelectedTab = item as TabItem;
}
/// <summary>
/// Called when the <see cref="SelectedIndex"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private void SelectedIndexChanged(PerspexPropertyChangedEventArgs e)
{
var index = (int)e.OldValue;
if (index != -1)
{
var container = ItemContainerGenerator.ContainerFromIndex(index);
MarkContainerSelected(container, false);
}
index = (int)e.NewValue;
if (index == -1)
{
SelectedItem = null;
}
else
{
SelectedItem = Items.Cast <object>().ElementAt((int)e.NewValue);
var container = ItemContainerGenerator.ContainerFromIndex(index);
MarkContainerSelected(container, true);
var inputElement = container as IInputElement;
if (inputElement != null && Presenter != null && Presenter.Panel != null)
{
KeyboardNavigation.SetTabOnceActiveElement(
(InputElement)Presenter.Panel,
inputElement);
}
}
}
private void ValueChanged(PerspexPropertyChangedEventArgs e)
{
if (this.indicator != null)
{
double percent = this.Maximum == this.Minimum ? 1.0 : ((double)e.NewValue - this.Minimum) / (this.Maximum - this.Minimum);
this.indicator.Width = this.Bounds.Width * percent;
}
}
private void ValueChanged(PerspexPropertyChangedEventArgs e)
{
if (_indicator != null)
{
double percent = Maximum == Minimum ? 1.0 : ((double)e.NewValue - Minimum) / (Maximum - Minimum);
_indicator.Width = Bounds.Width * percent;
}
}
private void ValueChanged(PerspexPropertyChangedEventArgs e)
{
if (_indicator != null)
{
double percent = Maximum == Minimum ? 1.0 : ((double)e.NewValue - Minimum) / (Maximum - Minimum);
_indicator.Width = Bounds.Width * percent;
}
}
private static void AdornedElementChanged(PerspexPropertyChangedEventArgs e)
{
var adorner = (Visual)e.Sender;
var adorned = (Visual)e.NewValue;
var layer = adorner.GetVisualParent <AdornerLayer>();
layer?.UpdateAdornedElement(adorner, adorned);
}
/// <inheritdoc/>
protected override void OnTemplateChanged(PerspexPropertyChangedEventArgs e)
{
base.OnTemplateChanged(e);
if (e.NewValue == null)
{
ItemContainerGenerator?.Clear();
}
}
/// <summary>
/// Called when the <see cref="SelectingItemsControl.SelectedIndex"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private void SelectedIndexChanged(PerspexPropertyChangedEventArgs e)
{
if ((int)e.NewValue != -1)
{
var item = SelectedItem as IContentControl;
var content = item?.Content ?? item;
SelectedTab = item as TabItem;
}
}
/// <summary>
/// Called when the <see cref="IsSelected"/> property changes on an object.
/// </summary>
/// <param name="e">The sender.</param>
private static void IsSelectedChanged(PerspexPropertyChangedEventArgs e)
{
var interactive = e.Sender as IInteractive;
if (interactive != null)
{
interactive.RaiseEvent(new RoutedEventArgs(SelectingItemsControl.IsSelectedChangedEvent));
}
}
/// <summary>
/// Called when the <see cref="SelectingItemsControl.SelectedIndex"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private void SelectedIndexChanged(PerspexPropertyChangedEventArgs e)
{
if ((int)e.NewValue != -1)
{
var item = SelectedItem as IContentControl;
var content = item?.Content ?? item;
SelectedTab = item as TabItem;
}
}
/// <summary>
/// Calls <see cref="InvalidateArrange"/> on the control on which a property changed.
/// </summary>
/// <param name="e">The event args.</param>
private static void AffectsArrangeInvalidate(PerspexPropertyChangedEventArgs e)
{
ILayoutable control = e.Sender as ILayoutable;
if (control != null)
{
control.InvalidateArrange();
}
}
/// <summary>
/// Called when the <see cref="Template"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
protected virtual void OnTemplateChanged(PerspexPropertyChangedEventArgs e)
{
if (_templateApplied && VisualChildren.Count > 0)
{
_templateApplied = false;
}
_templateApplied = false;
InvalidateMeasure();
}
private void OnSizeGripChanged(PerspexPropertyChangedEventArgs e)
{
var thumb = (e.Sender as Thumb);
if (thumb == null)
{
return;
}
thumb.DragDelta += SizeThumbOnDragDelta;
}
/// <summary>
/// Called when the <see cref="IsOpen"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private void IsOpenChanged(PerspexPropertyChangedEventArgs e)
{
if ((bool)e.NewValue)
{
Open();
}
else
{
Close();
}
}
/// <summary>
/// Called when the <see cref="Child"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private void ChildChanged(PerspexPropertyChangedEventArgs e)
{
LogicalChildren.Clear();
((ISetLogicalParent)e.OldValue)?.SetParent(null);
if (e.NewValue != null)
{
((ISetLogicalParent)e.NewValue).SetParent(this);
LogicalChildren.Add((ILogical)e.NewValue);
}
}
/// <summary>
/// Reacts to a change in a <see cref="PerspexProperty"/> value in order to animate the
/// change if a <see cref="PropertyTransition"/> is set for the property..
/// </summary>
/// <param name="e">The event args.</param>
protected override void OnPropertyChanged(PerspexPropertyChangedEventArgs e)
{
if (e.Priority != BindingPriority.Animation && _propertyTransitions != null)
{
var match = _propertyTransitions.FirstOrDefault(x => x.Property == e.Property);
if (match != null)
{
Animate.Property(this, e.Property, e.OldValue, e.NewValue, match.Easing, match.Duration);
}
}
}
/// <summary>
/// Reacts to a change in a <see cref="PerspexProperty"/> value in order to animate the
/// change if a <see cref="PropertyTransition"/> is set for the property..
/// </summary>
/// <param name="e">The event args.</param>
protected override void OnPropertyChanged(PerspexPropertyChangedEventArgs e)
{
if (e.Priority != BindingPriority.Animation && _propertyTransitions != null)
{
var match = _propertyTransitions.FirstOrDefault(x => x.Property == e.Property);
if (match != null)
{
Animate.Property(this, e.Property, e.OldValue, e.NewValue, match.Easing, match.Duration);
}
}
}
/// <summary>
/// Caled when the <see cref="Items"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
protected virtual void ItemsChanged(PerspexPropertyChangedEventArgs e)
{
var incc = e.OldValue as INotifyCollectionChanged;
if (incc != null)
{
incc.CollectionChanged -= ItemsCollectionChanged;
}
var newValue = e.NewValue as IEnumerable;
SubscribeToItems(newValue);
}
/// <inheritdoc/>
protected override void ItemsChanged(PerspexPropertyChangedEventArgs e)
{
base.ItemsChanged(e);
if (SelectedIndex != -1)
{
SelectedIndex = IndexOf((IEnumerable)e.NewValue, SelectedItem);
}
else if (AlwaysSelected && Items != null && Items.Cast <object>().Any())
{
SelectedIndex = 0;
}
}
/// <summary>
/// called when the <see cref="ContextMenuProperty"/> property changes on a control.
/// </summary>
/// <param name="e">The event args.</param>
private static void ContextMenuChanged(PerspexPropertyChangedEventArgs e)
{
var control = (Control)e.Sender;
if (e.OldValue != null)
{
control.PointerReleased -= ControlPointerReleased;
}
if (e.NewValue != null)
{
control.PointerReleased += ControlPointerReleased;
}
}
/// <summary>
/// Called when the <see cref="Control.ContextMenu"/> property changes on a control.
/// </summary>
/// <param name="e">The event args.</param>
private static void ContextMenuChanged(PerspexPropertyChangedEventArgs e)
{
var control = (Control)e.Sender;
if (e.OldValue != null)
{
control.PointerReleased -= ControlPointerReleased;
}
if (e.NewValue != null)
{
control.PointerReleased += ControlPointerReleased;
}
}
/// <summary>
/// Called when the <see cref="IsSubMenuOpen"/> property changes.
/// </summary>
/// <param name="e">The property change event.</param>
private void SubMenuOpenChanged(PerspexPropertyChangedEventArgs e)
{
var value = (bool)e.NewValue;
if (value)
{
RaiseEvent(new RoutedEventArgs(SubmenuOpenedEvent));
IsSelected = true;
}
else
{
CloseSubmenus();
SelectedIndex = -1;
}
}
/// <summary>
/// Called when the <see cref="Icon"/> property changes.
/// </summary>
/// <param name="e">The property change event.</param>
private void IconChanged(PerspexPropertyChangedEventArgs e)
{
var oldValue = e.OldValue as ILogical;
var newValue = e.NewValue as ILogical;
if (oldValue != null)
{
LogicalChildren.Remove(oldValue);
}
if (newValue != null)
{
LogicalChildren.Add(newValue);
}
}
/// <summary>
/// called when the <see cref="TipProperty"/> property changes on a control.
/// </summary>
/// <param name="e">The event args.</param>
private static void TipChanged(PerspexPropertyChangedEventArgs e)
{
var control = (Control)e.Sender;
if (e.OldValue != null)
{
control.PointerEnter -= ControlPointerEnter;
control.PointerLeave -= ControlPointerLeave;
}
if (e.NewValue != null)
{
control.PointerEnter += ControlPointerEnter;
control.PointerLeave += ControlPointerLeave;
}
}
/// <summary>
/// Caled when the <see cref="Items"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
protected virtual void ItemsChanged(PerspexPropertyChangedEventArgs e)
{
var incc = e.OldValue as INotifyCollectionChanged;
if (incc != null)
{
incc.CollectionChanged -= ItemsCollectionChanged;
}
var oldValue = e.OldValue as IEnumerable;
var newValue = e.NewValue as IEnumerable;
RemoveControlItemsFromLogicalChildren(oldValue);
AddControlItemsToLogicalChildren(newValue);
SubscribeToItems(newValue);
}
/// <summary>
/// called when the <see cref="TipProperty"/> property changes on a control.
/// </summary>
/// <param name="e">The event args.</param>
private static void TipChanged(PerspexPropertyChangedEventArgs e)
{
var control = (Control)e.Sender;
if (e.OldValue != null)
{
control.PointerEnter -= ControlPointerEnter;
control.PointerLeave -= ControlPointerLeave;
}
if (e.NewValue != null)
{
control.PointerEnter += ControlPointerEnter;
control.PointerLeave += ControlPointerLeave;
}
}
/// <summary>
/// Called when the <see cref="IsDefault"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private static void IsDefaultChanged(PerspexPropertyChangedEventArgs e)
{
var button = e.Sender as Button;
var isDefault = (bool)e.NewValue;
var inputRoot = button.VisualRoot as IInputElement;
if (inputRoot != null)
{
if (isDefault)
{
button.ListenForDefault(inputRoot);
}
else
{
button.StopListeningForDefault(inputRoot);
}
}
}
protected virtual void OnIsExpandedChanged(PerspexPropertyChangedEventArgs e)
{
IVisual visualContent = Presenter;
if (Content != null && ContentTransition != null && visualContent != null)
{
bool forward = ExpandDirection == ExpandDirection.Left ||
ExpandDirection == ExpandDirection.Up;
if (IsExpanded)
{
ContentTransition.Start(null, visualContent, forward);
}
else
{
ContentTransition.Start(visualContent, null, !forward);
}
}
}
protected virtual void OnIsExpandedChanged(PerspexPropertyChangedEventArgs e)
{
IVisual visualContent = Presenter;
if (Content != null && ContentTransition != null && visualContent != null)
{
bool forward = ExpandDirection == ExpandDirection.Left ||
ExpandDirection == ExpandDirection.Up;
if (IsExpanded)
{
ContentTransition.Start(null, visualContent, forward);
}
else
{
ContentTransition.Start(visualContent, null, !forward);
}
}
}
/// <summary>
/// Called when the <see cref="Child"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private void ChildChanged(PerspexPropertyChangedEventArgs e)
{
var oldChild = (Control)e.OldValue;
var newChild = (Control)e.NewValue;
if (oldChild != null)
{
((ISetLogicalParent)oldChild).SetParent(null);
LogicalChildren.Clear();
RemoveVisualChild(oldChild);
}
if (newChild != null)
{
AddVisualChild(newChild);
LogicalChildren.Add(newChild);
((ISetLogicalParent)newChild).SetParent(this);
}
}
private static void ItemsChanged(PerspexPropertyChangedEventArgs e)
{
var grid = (Grid)e.Sender;
var items = (IEnumerable)e.NewValue;
var template = grid.GetValue(TemplateProperty);
grid.Children.Clear();
if (items != null)
{
int count = 0;
int cols = grid.ColumnDefinitions.Count;
foreach (var item in items)
{
foreach (var control in template(item))
{
grid.Children.Add(control);
Grid.SetColumn(control, count % cols);
Grid.SetRow(control, count / cols);
++count;
}
}
int rows = (int)Math.Ceiling((double)count / cols);
int difference = rows - grid.RowDefinitions.Count;
if (difference > 0)
{
for (int i = 0; i < difference; ++i)
{
grid.RowDefinitions.Add(new RowDefinition(GridLength.Auto));
}
}
else if (difference < 0)
{
for (int i = 0; i < difference; ++i)
{
grid.RowDefinitions.RemoveAt(grid.RowDefinitions.Count - 1);
}
}
}
}
private void OnLayoutTransformChanged(PerspexPropertyChangedEventArgs e)
{
var newTransform = e.NewValue as Transform;
if (_transformChangedEvent != null)
{
_transformChangedEvent.Dispose();
_transformChangedEvent = null;
}
if (newTransform != null)
{
_transformChangedEvent = Observable.FromEventPattern <EventHandler, EventArgs>(
v => newTransform.Changed += v, v => newTransform.Changed -= v)
.Subscribe(onNext: v => ApplyLayoutTransform());
}
ApplyLayoutTransform();
}
/// <summary>
/// Called when the <see cref="IsDefault"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private static void IsDefaultChanged(PerspexPropertyChangedEventArgs e)
{
var button = e.Sender as Button;
var isDefault = (bool)e.NewValue;
var root = button.GetSelfAndVisualAncestors().OfType <IRenderRoot>().FirstOrDefault();
var inputElement = root as IInputElement;
if (inputElement != null)
{
if (isDefault)
{
button.ListenForDefault(inputElement);
}
else
{
button.StopListeningForDefault(inputElement);
}
}
}
/// <summary>
/// Called when the <see cref="SelectedItem"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private void SelectedItemChanged(PerspexPropertyChangedEventArgs e)
{
SelectedIndex = IndexOf(Items, e.NewValue);
}
/// <summary>
/// Called when the <see cref="SelectedIndex"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private void SelectedIndexChanged(PerspexPropertyChangedEventArgs e)
{
var index = (int)e.OldValue;
if (index != -1)
{
var container = ItemContainerGenerator.ContainerFromIndex(index);
MarkContainerSelected(container, false);
}
index = (int)e.NewValue;
if (index == -1)
{
SelectedItem = null;
}
else
{
SelectedItem = Items.Cast<object>().ElementAt((int)e.NewValue);
var container = ItemContainerGenerator.ContainerFromIndex(index);
MarkContainerSelected(container, true);
var inputElement = container as IInputElement;
if (inputElement != null && Presenter != null && Presenter.Panel != null)
{
KeyboardNavigation.SetTabOnceActiveElement(
(InputElement)Presenter.Panel,
inputElement);
}
}
}
/// <inheritdoc/>
protected override void ItemsChanged(PerspexPropertyChangedEventArgs e)
{
base.ItemsChanged(e);
if (SelectedIndex != -1)
{
SelectedIndex = IndexOf((IEnumerable)e.NewValue, SelectedItem);
}
else if (AutoSelect && Items != null & Items.Cast<object>().Any())
{
SelectedIndex = 0;
}
}
/// <summary>
/// Called when the <see cref="IsSubMenuOpen"/> property changes.
/// </summary>
/// <param name="e">The property change event.</param>
private void SubMenuOpenChanged(PerspexPropertyChangedEventArgs e)
{
var value = (bool)e.NewValue;
if (value)
{
this.RaiseEvent(new RoutedEventArgs(SubmenuOpenedEvent));
this.IsSelected = true;
}
else
{
this.CloseSubmenus();
this.SelectedIndex = -1;
}
}
private void SelectedItemChanged(PerspexPropertyChangedEventArgs e)
{
UpdateSelectionBoxItem(e.NewValue);
}
/// <summary>
/// Called when the <see cref="IsDefault"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private static void IsDefaultChanged(PerspexPropertyChangedEventArgs e)
{
var button = e.Sender as Button;
var isDefault = (bool)e.NewValue;
var root = button.GetSelfAndVisualAncestors().OfType<IRenderRoot>().FirstOrDefault();
var inputElement = root as IInputElement;
if (inputElement != null)
{
if (isDefault)
{
button.ListenForDefault(inputElement);
}
else
{
button.StopListeningForDefault(inputElement);
}
}
}
/// <summary>
/// Called when the <see cref="Child"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private void ChildChanged(PerspexPropertyChangedEventArgs e)
{
LogicalChildren.Clear();
if (e.OldValue != null)
{
((ISetLogicalParent)e.OldValue).SetParent(null);
}
if (e.NewValue != null)
{
((ISetLogicalParent)e.NewValue).SetParent(this);
LogicalChildren.Add((ILogical)e.NewValue);
}
}
/// <summary>
/// Called when the <see cref="Content"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private void ContentChanged(PerspexPropertyChangedEventArgs e)
{
_createdChild = false;
InvalidateMeasure();
}
/// <summary>
/// Called when the <see cref="Items"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private void ItemsChanged(PerspexPropertyChangedEventArgs e)
{
if (_createdPanel)
{
var generator = ItemContainerGenerator;
if (e.OldValue != null)
{
generator.ClearContainers();
Panel.Children.Clear();
INotifyCollectionChanged incc = e.OldValue as INotifyCollectionChanged;
if (incc != null)
{
incc.CollectionChanged -= ItemsCollectionChanged;
}
}
if (Panel != null)
{
CreateItemsAndListenForChanges((IEnumerable)e.NewValue);
}
}
}
/// <summary>
/// Caled when the <see cref="Items"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
protected virtual void ItemsChanged(PerspexPropertyChangedEventArgs e)
{
var incc = e.OldValue as INotifyCollectionChanged;
if (incc != null)
{
incc.CollectionChanged += this.ItemsCollectionChanged;
}
var newValue = e.NewValue as IEnumerable;
if (newValue == null || newValue.Count() == 0)
{
this.Classes.Add(":empty");
}
else
{
this.Classes.Remove(":empty");
}
incc = newValue as INotifyCollectionChanged;
if (incc != null)
{
incc.CollectionChanged += this.ItemsCollectionChanged;
}
}
/// <summary>
/// Called when the <see cref="SelectingItemsControl.SelectedIndex"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private void SelectedItemChanged(PerspexPropertyChangedEventArgs e)
{
var item = e.NewValue as IContentControl;
var content = item?.Content ?? item;
SelectedTab = item as TabItem;
}
private void SelectedItemChanged(PerspexPropertyChangedEventArgs e)
{
var control = e.NewValue as IControl;
if (control != null)
{
SelectionBoxItem = new Rectangle
{
Width = control.DesiredSize.Width,
Height = control.DesiredSize.Height,
Fill = new VisualBrush
{
Visual = control,
Stretch = Stretch.None,
AlignmentX = AlignmentX.Left,
}
};
}
else
{
SelectionBoxItem = e.NewValue;
}
}
/// <summary>
/// Called when the <see cref="SelectedIndex"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private void SelectedIndexChanged(PerspexPropertyChangedEventArgs e)
{
if (Panel != null)
{
var task = MoveToPage((int)e.OldValue, (int)e.NewValue);
}
}
/// <summary>
/// Called when the <see cref="Command"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private static void CommandChanged(PerspexPropertyChangedEventArgs e)
{
var button = e.Sender as Button;
if (button != null)
{
var oldCommand = e.OldValue as ICommand;
var newCommand = e.NewValue as ICommand;
if (oldCommand != null)
{
oldCommand.CanExecuteChanged -= button.CanExecuteChanged;
}
if (newCommand != null)
{
newCommand.CanExecuteChanged += button.CanExecuteChanged;
}
button.CanExecuteChanged(button, EventArgs.Empty);
}
}
/// <summary>
/// Called when the <see cref="SelectedIndex"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private static void SelectedIndexChanged(PerspexPropertyChangedEventArgs e)
{
var control = e.Sender as SelectingItemsControl;
if (control != null)
{
var index = (int)e.NewValue;
if (index == -1)
{
control.SelectedItem = null;
}
else
{
control.SelectedItem = control.Items.ElementAt((int)e.NewValue);
}
}
}
/// <summary>
/// Called when the <see cref="IsOpen"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private void IsOpenChanged(PerspexPropertyChangedEventArgs e)
{
if ((bool)e.NewValue)
{
Open();
}
else
{
Close();
}
}
private static void IsEnabledChanged(PerspexPropertyChangedEventArgs e)
{
((InputElement)e.Sender).UpdateIsEnabledCore();
}
/// <summary>
/// Called when the <see cref="SelectedItem"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private static void SelectedItemChanged(PerspexPropertyChangedEventArgs e)
{
var control = e.Sender as SelectingItemsControl;
if (control != null)
{
control.SelectedItemChanged(e.NewValue);
}
}
