private void OnViewPortPropertyChanged(object sender, PropertyChangedEventArgs e)
{
var propertyChangesThatRequireRedraw = new[] {
nameof(Core.ViewModels.ViewPort.SelectionStart),
nameof(Core.ViewModels.ViewPort.SelectionEnd),
nameof(Core.ViewModels.ViewPort.ScrollValue),
};
if (propertyChangesThatRequireRedraw.Contains(e.PropertyName))
{
InvalidateVisual();
CursorNeedsUpdate?.Invoke(this, EventArgs.Empty);
}
var propertyChangesThatRequireResize = new[] {
nameof(IViewPort.StretchData),
nameof(IViewPort.AllowMultipleElementsPerLine),
nameof(Core.ViewModels.ViewPort.PreferredWidth),
};
if (propertyChangesThatRequireResize.Contains(e.PropertyName))
{
UpdateViewPortSize();
InvalidateVisual();
CursorNeedsUpdate?.Invoke(this, EventArgs.Empty);
}
}
private void OnViewPortChanged(DependencyPropertyChangedEventArgs e)
{
if (e.OldValue is IViewPort oldViewPort)
{
oldViewPort.CollectionChanged -= OnViewPortContentChanged;
oldViewPort.PropertyChanged -= OnViewPortPropertyChanged;
oldViewPort.RequestMenuClose -= OnViewPortRequestMenuClose;
oldViewPort.Headers.CollectionChanged -= OnViewPortContentChanged;
}
if (e.NewValue is IViewPort newViewPort)
{
newViewPort.CollectionChanged += OnViewPortContentChanged;
newViewPort.PropertyChanged += OnViewPortPropertyChanged;
newViewPort.RequestMenuClose += OnViewPortRequestMenuClose;
newViewPort.Headers.CollectionChanged += OnViewPortContentChanged;
UpdateViewPortSize();
}
InvalidateVisual();
CursorNeedsUpdate?.Invoke(this, EventArgs.Empty);
}
private void OnViewPortContentChanged(object sender, NotifyCollectionChangedEventArgs e)
{
InvalidateVisual();
CursorNeedsUpdate?.Invoke(this, EventArgs.Empty);
}