private static void ClearRowSelector(RowSelectorDecorator decorator)
{
Debug.Assert(decorator != null);
DataGridControl.ClearContainer(decorator);
var rowSelector = decorator.RowSelector;
if (rowSelector != null)
{
rowSelector.ReferenceElement = null;
rowSelector.ContainerRect = RowSelectorPane.EmptyRect;
}
}
private static void PrepareRowSelector(RowSelectorDecorator decorator, DependencyObject container, Rect containerRect, FrameworkElement referenceElement)
{
Debug.Assert(decorator != null);
DataGridControl.SetContainer(decorator, container);
var rowSelector = decorator.RowSelector;
if (rowSelector != null)
{
rowSelector.ReferenceElement = referenceElement;
rowSelector.ContainerRect = containerRect;
}
}
private bool IsRowSelectorVisible(RowSelectorDecorator decorator)
{
Debug.Assert(decorator != null);
if (decorator.RowSelector == null)
{
return(false);
}
var container = DataGridControl.GetContainer(decorator);
if (container == null)
{
return(false);
}
return(m_visibleSelectors.ContainsKey(container));
}
private Size GetAvailableSize(RowSelectorDecorator decorator, Size availableSize)
{
var rowSelector = decorator.RowSelector;
if (rowSelector == null)
{
return(RowSelectorPane.EmptySize);
}
var containerRect = rowSelector.ContainerRect;
if (this.Orientation == Orientation.Vertical)
{
return(new Size(availableSize.Width, containerRect.Height));
}
return(new Size(containerRect.Width, availableSize.Height));
}
private Rect GetArrangeRect(RowSelectorDecorator decorator, Size finalSize)
{
var rowSelector = decorator.RowSelector;
if (rowSelector == null)
{
return(RowSelectorPane.EmptyRect);
}
var container = rowSelector.DataContext as FrameworkElement;
Debug.Assert(container != null);
var coordinatesTransform = container.TransformToVisual(this);
var origin = coordinatesTransform.Transform(RowSelectorPane.OriginPoint);
if (this.Orientation == Orientation.Vertical)
{
return(new Rect(0, origin.Y, finalSize.Width, container.ActualHeight));
}
return(new Rect(origin.X, 0, container.ActualWidth, finalSize.Height));
}
private RowSelectorDecorator RecycleOrCreateRowSelector(DependencyObject container)
{
RowSelectorDecorator decorator;
// Try to re-use a RowSelector that is schedule to be clean up.
if (m_pendingCleanup.Count > 0)
{
int index = m_pendingCleanup.Count - 1;
for (int i = index; i >= 0; i--)
{
decorator = m_pendingCleanup[i];
if (DataGridControl.GetContainer(decorator) == container)
{
index = i;
break;
}
}
decorator = m_pendingCleanup[index];
m_pendingCleanup.RemoveAt(index);
}
// Try to recycle a RowSelector from the recycling pool.
else if (m_recyclingQueue.Count > 0)
{
decorator = m_recyclingQueue.Dequeue();
}
else
{
decorator = new RowSelectorDecorator();
this.InternalChildren.Add(decorator);
}
return(decorator);
}
private Geometry GetClipRegion(RowSelectorDecorator decorator, Rect arrangeRect, FrameworkElement referenceElement)
{
if (referenceElement == null)
{
return(null);
}
var rowSelector = decorator.RowSelector;
if (rowSelector == null)
{
return(null);
}
GeneralTransform referenceElementToRowSelectorPaneTransform = referenceElement.TransformToVisual(this);
Rect referenceElementRegion = referenceElementToRowSelectorPaneTransform.TransformBounds(new Rect(0, 0, referenceElement.ActualWidth, referenceElement.ActualHeight));
RectangleGeometry clipRegion = null;
if (this.Orientation == Orientation.Vertical)
{
UIElement container = rowSelector.DataContext as UIElement;
if ((container != null) && (container.Clip != null))
{
Rect containerClipBounds = container.Clip.Bounds;
// In this case, we will use the container's clip properties (Top and Bottom).
clipRegion = new RectangleGeometry(new Rect(0d, containerClipBounds.Y, arrangeRect.Width, containerClipBounds.Height));
}
else if ((arrangeRect.Top < referenceElementRegion.Top) || (arrangeRect.Bottom > referenceElementRegion.Bottom))
{
double x = 0d;
double y = Math.Max(referenceElementRegion.Top - arrangeRect.Top, 0);
double width = arrangeRect.Width;
double height = Math.Max(0, arrangeRect.Height - y - Math.Max(0, arrangeRect.Bottom - referenceElementRegion.Bottom));
clipRegion = new RectangleGeometry(new Rect(x, y, width, height));
}
}
else
{
UIElement container = rowSelector.DataContext as UIElement;
if ((container != null) && (container.Clip != null))
{
Rect containerClipBounds = container.Clip.Bounds;
// In this case, we will use the container's clip properties (Left and Right).
clipRegion = new RectangleGeometry(new Rect(containerClipBounds.X, 0d, containerClipBounds.Width, arrangeRect.Height));
}
else if ((arrangeRect.Left < referenceElementRegion.Left) || (arrangeRect.Right > referenceElementRegion.Right))
{
double x = Math.Max(referenceElementRegion.Left - arrangeRect.Left, 0);
double y = 0d;
double width = arrangeRect.Width - x - Math.Max(0, arrangeRect.Right - referenceElementRegion.Right);
double height = arrangeRect.Height;
clipRegion = new RectangleGeometry(new Rect(x, y, width, height));
}
}
return(clipRegion);
}
private static void PrepareRowSelector( RowSelectorDecorator decorator, DependencyObject container, Rect containerRect, FrameworkElement referenceElement )
{
Debug.Assert( decorator != null );
DataGridControl.SetContainer( decorator, container );
var rowSelector = decorator.RowSelector;
if( rowSelector != null )
{
rowSelector.ReferenceElement = referenceElement;
rowSelector.ContainerRect = containerRect;
}
}
private static void ClearRowSelector( RowSelectorDecorator decorator )
{
Debug.Assert( decorator != null );
DataGridControl.ClearContainer( decorator );
var rowSelector = decorator.RowSelector;
if( rowSelector != null )
{
rowSelector.ReferenceElement = null;
rowSelector.ContainerRect = RowSelectorPane.EmptyRect;
}
}
private RowSelectorDecorator RecycleOrCreateRowSelector( DependencyObject container )
{
RowSelectorDecorator decorator;
// Try to re-use a RowSelector that is schedule to be clean up.
if( m_pendingCleanup.Count > 0 )
{
int index = m_pendingCleanup.Count - 1;
for( int i = index; i >= 0; i-- )
{
decorator = m_pendingCleanup[ i ];
if( DataGridControl.GetContainer( decorator ) == container )
{
index = i;
break;
}
}
decorator = m_pendingCleanup[ index ];
m_pendingCleanup.RemoveAt( index );
}
// Try to recycle a RowSelector from the recycling pool.
else if( m_recyclingQueue.Count > 0 )
{
decorator = m_recyclingQueue.Dequeue();
}
else
{
decorator = new RowSelectorDecorator();
this.InternalChildren.Add( decorator );
}
return decorator;
}
private bool IsRowSelectorVisible( RowSelectorDecorator decorator )
{
Debug.Assert( decorator != null );
if( decorator.RowSelector == null )
return false;
var container = DataGridControl.GetContainer( decorator );
if( container == null )
return false;
return m_visibleSelectors.ContainsKey( container );
}
private Geometry GetClipRegion( RowSelectorDecorator decorator, Rect arrangeRect, FrameworkElement referenceElement )
{
if( referenceElement == null )
return null;
var rowSelector = decorator.RowSelector;
if( rowSelector == null )
return null;
GeneralTransform referenceElementToRowSelectorPaneTransform = referenceElement.TransformToVisual( this );
Rect referenceElementRegion = referenceElementToRowSelectorPaneTransform.TransformBounds( new Rect( 0, 0, referenceElement.ActualWidth, referenceElement.ActualHeight ) );
RectangleGeometry clipRegion = null;
if( this.Orientation == Orientation.Vertical )
{
UIElement container = rowSelector.DataContext as UIElement;
if( ( container != null ) && ( container.Clip != null ) )
{
Rect containerClipBounds = container.Clip.Bounds;
// In this case, we will use the container's clip properties (Top and Bottom).
clipRegion = new RectangleGeometry( new Rect( 0d, containerClipBounds.Y, arrangeRect.Width, containerClipBounds.Height ) );
}
else if( ( arrangeRect.Top < referenceElementRegion.Top ) || ( arrangeRect.Bottom > referenceElementRegion.Bottom ) )
{
double x = 0d;
double y = Math.Max( referenceElementRegion.Top - arrangeRect.Top, 0 );
double width = arrangeRect.Width;
double height = Math.Max( 0, arrangeRect.Height - y - Math.Max( 0, arrangeRect.Bottom - referenceElementRegion.Bottom ) );
clipRegion = new RectangleGeometry( new Rect( x, y, width, height ) );
}
}
else
{
UIElement container = rowSelector.DataContext as UIElement;
if( ( container != null ) && ( container.Clip != null ) )
{
Rect containerClipBounds = container.Clip.Bounds;
// In this case, we will use the container's clip properties (Left and Right).
clipRegion = new RectangleGeometry( new Rect( containerClipBounds.X, 0d, containerClipBounds.Width, arrangeRect.Height ) );
}
else if( ( arrangeRect.Left < referenceElementRegion.Left ) || ( arrangeRect.Right > referenceElementRegion.Right ) )
{
double x = Math.Max( referenceElementRegion.Left - arrangeRect.Left, 0 );
double y = 0d;
double width = arrangeRect.Width - x - Math.Max( 0, arrangeRect.Right - referenceElementRegion.Right );
double height = arrangeRect.Height;
clipRegion = new RectangleGeometry( new Rect( x, y, width, height ) );
}
}
return clipRegion;
}
private Size GetAvailableSize( RowSelectorDecorator decorator, Size availableSize )
{
var rowSelector = decorator.RowSelector;
if( rowSelector == null )
return RowSelectorPane.EmptySize;
var containerRect = rowSelector.ContainerRect;
if( this.Orientation == Orientation.Vertical )
return new Size( availableSize.Width, containerRect.Height );
return new Size( containerRect.Width, availableSize.Height );
}
private Rect GetArrangeRect( RowSelectorDecorator decorator, Size finalSize )
{
var rowSelector = decorator.RowSelector;
if( rowSelector == null )
return RowSelectorPane.EmptyRect;
var container = rowSelector.DataContext as FrameworkElement;
Debug.Assert( container != null );
var coordinatesTransform = container.TransformToVisual( this );
var origin = coordinatesTransform.Transform( RowSelectorPane.OriginPoint );
if( this.Orientation == Orientation.Vertical )
return new Rect( 0, origin.Y, finalSize.Width, container.ActualHeight );
return new Rect( origin.X, 0, container.ActualWidth, finalSize.Height );
}