private static void OnParentGridControlChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
RowSelector rowSelector = ( RowSelector )sender;
DataGridControl newGrid = e.NewValue as DataGridControl;
if (newGrid != null)
{
rowSelector.PrepareDefaultStyleKey(newGrid.GetView());
}
}
private Size PrepareAvailableSizeForRowSelector(RowSelector rowSelector, Size availableSize)
{
Rect containerRect = rowSelector.ContainerRect;
Size returnSize;
if (this.Orientation == Orientation.Vertical)
{
returnSize = new Size(availableSize.Width, containerRect.Height);
}
else
{
returnSize = new Size(containerRect.Width, availableSize.Height);
}
return(returnSize);
}
internal void FreeRowSelector(DependencyObject container)
{
RowSelector rowSelector = null;
//Check if a RowSelector is already assigned to the container passed.
if (m_visibleSelectors.TryGetValue(container, out rowSelector) == true)
{
//Remove from Visible list, add to pending cleanup list
m_visibleSelectors.Remove(container);
m_pendingCleanup.Add(rowSelector);
//clear data context (container) from the RowSelector.
rowSelector.DataContext = null;
DataGridControl.ClearContainer(rowSelector);
//Invalidate Measure since the list of VisibleSelector + PendingCleanup changed
this.InvalidateMeasure();
}
//If there are no RowSelector for container, then do nothing.
}
internal void SetRowSelectorPosition(DependencyObject container, Rect containerRect, FrameworkElement referenceElement)
{
Debug.Assert(( Visibility )this.GetValue(RowSelectorPane.VisibilityProperty) == Visibility.Visible, "We should not be creating RowSelectors if we are not Visible.");
RowSelector rowSelector = null;
//Check if a RowSelector is already assigned to the container passed.
if (m_visibleSelectors.TryGetValue(container, out rowSelector) == false)
{
//If no RowSelector exists for this container, try to recycle one.
if (m_recycleQueue.Count > 0)
{
//get next recyclable RowSelector.
rowSelector = m_recycleQueue.Dequeue();
}
else
{
//Recycling pool empty, create a new RowSelector and place it in the visual tree right away.
rowSelector = new RowSelector();
this.InternalChildren.Add(rowSelector);
}
//Since there was no RowSelector for the container, map the container to this RowSelector
rowSelector.DataContext = container;
DataGridControl.SetContainer(rowSelector, container);
rowSelector.ReferenceElement = referenceElement;
m_visibleSelectors.Add(container, rowSelector);
}
//At this stage, it is not normal that no RowSelector instance is available.
Debug.Assert(rowSelector != null);
if (rowSelector == null)
{
throw new InvalidOperationException("An attempt was made to set the position of a row selector that does not exist.");
}
rowSelector.ContainerRect = containerRect;
this.InvalidateMeasure();
}
private static void OnRowSelectorStyleChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
RowSelector rowSelector = sender as RowSelector;
//Here, since the property is an Attached propety, the type of sender can be anything, but in this particular case, I want
//to filter out everything but RowSelector since this is my queue to set a local style on the RowSelector ( or clear the local
//value).
if (rowSelector == null)
{
return;
}
if (e.NewValue == null)
{
rowSelector.ClearValue(RowSelector.StyleProperty);
}
else
{
rowSelector.SetValue(RowSelector.StyleProperty, e.NewValue);
}
}
private Rect PrepareArrangeRectForRowSelector(Size finalSize, RowSelector visibleRowSelector)
{
Rect returnRect;
FrameworkElement container = visibleRowSelector.DataContext as FrameworkElement;
Debug.Assert(container != null);
GeneralTransform coordinatesTransform = container.TransformToVisual(this);
Point origin = coordinatesTransform.Transform(OriginPoint);
if (this.Orientation == Orientation.Vertical)
{
returnRect = new Rect(0, origin.Y, finalSize.Width, container.ActualHeight);
}
else
{
returnRect = new Rect(origin.X, 0, container.ActualWidth, finalSize.Height);
}
return(returnRect);
}
private Geometry PrepareClipForRowSelector(RowSelector rowSelector, Rect arrangeRect, FrameworkElement referenceElement)
{
if (referenceElement == 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);
}
internal void SetRowSelectorPosition( DependencyObject container, Rect containerRect, FrameworkElement referenceElement )
{
Debug.Assert( ( Visibility )this.GetValue( RowSelectorPane.VisibilityProperty ) == Visibility.Visible, "We should not be creating RowSelectors if we are not Visible." );
RowSelector rowSelector = null;
//Check if a RowSelector is already assigned to the container passed.
if( m_visibleSelectors.TryGetValue( container, out rowSelector ) == false )
{
//If no RowSelector exists for this container, try to recycle one.
if( m_recycleQueue.Count > 0 )
{
//get next recyclable RowSelector.
rowSelector = m_recycleQueue.Dequeue();
}
else
{
//Recycling pool empty, create a new RowSelector and place it in the visual tree right away.
rowSelector = new RowSelector();
this.InternalChildren.Add( rowSelector );
}
//Since there was no RowSelector for the container, map the container to this RowSelector
rowSelector.DataContext = container;
DataGridControl.SetContainer( rowSelector, container );
rowSelector.ReferenceElement = referenceElement;
m_visibleSelectors.Add( container, rowSelector );
}
//At this stage, it is not normal that no RowSelector instance is available.
Debug.Assert( rowSelector != null );
if( rowSelector == null )
throw new InvalidOperationException( "An attempt was made to set the position of a row selector that does not exist." );
rowSelector.ContainerRect = containerRect;
this.InvalidateMeasure();
}
private Geometry PrepareClipForRowSelector( RowSelector rowSelector, Rect arrangeRect, FrameworkElement referenceElement )
{
if( referenceElement == 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 PrepareAvailableSizeForRowSelector( RowSelector rowSelector, Size availableSize )
{
Rect containerRect = rowSelector.ContainerRect;
Size returnSize;
if( this.Orientation == Orientation.Vertical )
{
returnSize = new Size( availableSize.Width, containerRect.Height );
}
else
{
returnSize = new Size( containerRect.Width, availableSize.Height );
}
return returnSize;
}
private Rect PrepareArrangeRectForRowSelector( Size finalSize, RowSelector visibleRowSelector )
{
Rect returnRect;
FrameworkElement container = visibleRowSelector.DataContext as FrameworkElement;
Debug.Assert( container != null );
GeneralTransform coordinatesTransform = container.TransformToVisual( this );
Point origin = coordinatesTransform.Transform( OriginPoint );
if( this.Orientation == Orientation.Vertical )
{
returnRect = new Rect( 0, origin.Y, finalSize.Width, container.ActualHeight );
}
else
{
returnRect = new Rect( origin.X, 0, container.ActualWidth, finalSize.Height );
}
return returnRect;
}
