internal static bool TryGetParentExtensionWindow(FrameworkElement element, out ExtensionWindow window, out ExtensionSurface surface)
{
window = null;
surface = null;
if (null != element)
{
FrameworkElement current = element;
window = element.TemplatedParent as ExtensionWindow;
while (null == window && null != current)
{
window = current as ExtensionWindow;
current = (FrameworkElement)current.Parent;
}
if (null != window)
{
current = window;
surface = window.TemplatedParent as ExtensionSurface;
while (null == surface && null != current)
{
surface = current as ExtensionSurface;
current = (FrameworkElement)current.Parent;
}
}
}
return(null != window && null != surface);
}
void OnChildWindowLoaded(object sender, EventArgs e)
{
ExtensionWindow window = (ExtensionWindow)sender;
this.OnWindowVisibilityChanged(window, null);
window.Loaded -= OnChildWindowLoaded;
}
protected override void OnVisualChildrenChanged(DependencyObject visualAdded, DependencyObject visualRemoved)
{
ExtensionWindow window = visualRemoved as ExtensionWindow;
if (null != window)
{
window.VisibilityChanged -= OnWindowVisibilityChanged;
// window.SizeChanged -= OnWindowSizeChanged;
this.rearangeStartSize.Width = 0;
this.rearangeStartSize.Height = 0;
}
base.OnVisualChildrenChanged(visualAdded, visualRemoved);
window = visualAdded as ExtensionWindow;
if (null != window)
{
window.VisibilityChanged += OnWindowVisibilityChanged;
// window.SizeChanged += OnWindowSizeChanged;
if (!window.IsLoaded)
{
window.Loaded += OnChildWindowLoaded;
}
}
}
static void OnPlacementModeChanged(DependencyObject sender, DependencyPropertyChangedEventArgs args)
{
ExtensionWindow window = sender as ExtensionWindow;
if (null != window && null != window.Surface && window.Visibility == Visibility.Visible)
{
window.Surface.PlaceWindow(window);
}
}
protected override void OnVisualParentChanged(DependencyObject oldParent)
{
base.OnVisualParentChanged(oldParent);
if (!DesignerProperties.GetIsInDesignMode(this) &&
!ExtensionWindow.TryGetParentExtensionWindow(this, out this.parent, out this.surface))
{
Fx.Assert("ExtensionWindowHeader cannot be used outside ExtensionWindow");
}
}
internal void SetWindowPosition(ExtensionWindow window, Point position)
{
Func <double, double, double, double, double> CalculateInBoundsValue =
(pos, size, limit, modifier) =>
{
if (this.AutoExpandCanvas)
{
return(pos - modifier);
}
else
{
pos = Math.Max(0.0, pos);
return(pos + size > limit ? limit - size : pos);
}
};
//in case of AutoExpandCanvas == false:
// - do not allow placing window outside surface bounds
//in case of AutoExpandCanvas == true:
// - include possible negative canvas offset
position.X = CalculateInBoundsValue(position.X, window.DesiredSize.Width, this.ActualWidth, this.selectedChild.Value.X);
position.Y = CalculateInBoundsValue(position.Y, window.DesiredSize.Height, this.ActualHeight, this.selectedChild.Value.Y);
//update its position on canvas
ExtensionSurface.SetPosition(window, position);
bool requiresMeasure = false;
if (this.AutoExpandCanvas)
{
requiresMeasure = true;
this.canvasOffset.X = 0;
this.canvasOffset.Y = 0;
foreach (UIElement item in this.Children)
{
FrameworkElement child = item as FrameworkElement;
if (null != child)
{
Point p = ExtensionSurface.GetPosition(child);
this.canvasOffset.X = Math.Min(this.canvasOffset.X, p.X);
this.canvasOffset.Y = Math.Min(this.canvasOffset.Y, p.Y);
}
}
this.canvasOffset.X = Math.Abs(this.canvasOffset.X);
this.canvasOffset.Y = Math.Abs(this.canvasOffset.Y);
}
if (requiresMeasure)
{
this.InvalidateMeasure();
}
else
{
this.InvalidateArrange();
}
}
public void SelectWindow(ExtensionWindow window)
{
if (null != window && this.Children.Contains(window))
{
this.selectedChild = new KeyValuePair <FrameworkElement, Point>(window, this.canvasOffset);
this.rearangeStartSize.Width = this.ActualWidth;
this.rearangeStartSize.Height = this.ActualHeight;
Panel.SetZIndex(window, ++this.currentZIndex);
}
}
static internal void RaiseWindowCloseEvent(ExtensionWindow sender)
{
ExtensionWindowClosingRoutedEventArgs args = new ExtensionWindowClosingRoutedEventArgs(ClosingEvent, sender);
sender.RaiseEvent(args);
if (!args.Cancel)
{
sender.RaiseEvent(new RoutedEventArgs(CloseEvent, sender));
}
}
void OnExtensionWindowClosed(object sender, RoutedEventArgs args)
{
ExtensionWindow window = args.Source as ExtensionWindow;
if (null != window)
{
//remove window from children collection
this.Children.Remove(window);
}
}
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
this.closeButton = this.Template.FindName("PART_CloseButton", this) as Button;
if (null != this.closeButton)
{
this.closeButton.Click += new RoutedEventHandler(delegate(object sender, RoutedEventArgs e)
{
ExtensionWindow.RaiseWindowCloseEvent(this.parent);
}
);
}
}
//void OnWindowSizeChanged(object sender, SizeChangedEventArgs e)
//{
// ExtensionWindow window = (ExtensionWindow)sender;
// // EnsureWindowIsVisible(window);
//}
void OnWindowVisibilityChanged(object sender, RoutedEventArgs args)
{
ExtensionWindow window = (ExtensionWindow)sender;
if (window.IsVisible)
{
Func <double, bool> IsInvalid = x => (double.IsInfinity(x) || double.IsNaN(x) || double.Epsilon > x);
if (IsInvalid(window.ActualWidth) || IsInvalid(window.ActualWidth) || IsInvalid(window.DesiredSize.Width) || IsInvalid(window.DesiredSize.Height))
{
window.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
}
PlaceWindow(window);
}
}
protected override void OnRenderSizeChanged(SizeChangedInfo sizeInfo)
{
base.OnRenderSizeChanged(sizeInfo);
foreach (FrameworkElement child in this.Children)
{
ExtensionWindow window = child as ExtensionWindow;
if (null != window)
{
if (PlacementMode.Relative == GetMode(window) && null != GetPlacementTarget(window))
{
this.PlaceWindow(window);
continue;
}
if (!this.AutoExpandCanvas)
{
this.EnsureWindowIsVisible(window);
}
}
}
}
internal void SetSize(ExtensionWindow window, Size size)
{
Point pos = ExtensionSurface.GetPosition(window);
if (!this.AutoExpandCanvas)
{
if (IsGreater(pos.X, size.Width, this.ActualWidth))
{
size.Width = this.ActualWidth - pos.X;
}
if (IsGreater(pos.Y, size.Height, this.ActualHeight))
{
size.Height = this.ActualHeight - pos.Y;
}
}
System.Diagnostics.Debug.WriteLine("SetSize oldSize (" + window.Width + "," + window.Height + ") newSize (" + size.Width + "," + size.Height + ")");
window.Width = size.Width;
window.Height = size.Height;
if (this.AutoExpandCanvas)
{
// this.InvalidateMeasure();
}
}
internal static bool TryGetParentExtensionWindow(FrameworkElement element, out ExtensionWindow window, out ExtensionSurface surface)
{
window = null;
surface = null;
if (null != element)
{
FrameworkElement current = element;
window = element.TemplatedParent as ExtensionWindow;
while (null == window && null != current)
{
window = current as ExtensionWindow;
current = (FrameworkElement)current.Parent;
}
if (null != window)
{
current = window;
surface = window.TemplatedParent as ExtensionSurface;
while (null == surface && null != current)
{
surface = current as ExtensionSurface;
current = (FrameworkElement)current.Parent;
}
}
}
return (null != window && null != surface);
}
static internal void RaiseWindowCloseEvent(ExtensionWindow sender)
{
ExtensionWindowClosingRoutedEventArgs args = new ExtensionWindowClosingRoutedEventArgs(ClosingEvent, sender);
sender.RaiseEvent(args);
if (!args.Cancel)
{
sender.RaiseEvent(new RoutedEventArgs(CloseEvent, sender));
}
}
void PlaceWindow(ExtensionWindow window)
{
if (null != window)
{
FrameworkElement target = ExtensionSurface.GetPlacementTarget(window);
PositionAlignment alignment = ExtensionSurface.GetAlignment(window);
PlacementMode mode = ExtensionSurface.GetMode(window);
Point position = ExtensionSurface.GetPosition(window);
Point calculatedPosition = new Point();
FrameworkElement commonRoot = null;
MatrixTransform transform = null;
switch (mode)
{
case PlacementMode.Relative:
if (null != target)
{
commonRoot = target.FindCommonVisualAncestor(this) as FrameworkElement;
if (null == commonRoot)
{
return;
}
transform = (MatrixTransform)target.TransformToAncestor(commonRoot);
}
else
{
if (!DesignerProperties.GetIsInDesignMode(this))
{
Fx.Assert(string.Format(CultureInfo.InvariantCulture, "PlacementTarget must be set in RelativeMode on ExtensionSurface '{0}'", this.Name));
}
}
break;
case PlacementMode.Absolute:
calculatedPosition = position;
break;
default:
Fx.Assert(string.Format(CultureInfo.CurrentCulture, "ExtensionWindowPlacement.Mode {0} specified in ExtensionWindow '{1}' is not supported for ExtensionSurface", mode, window.Name));
return;
}
if (PlacementMode.Relative == mode)
{
if (null != target)
{
double x;
double y;
switch (alignment)
{
case PositionAlignment.LeftTop:
calculatedPosition = transform.Transform(calculatedPosition);
break;
case PositionAlignment.LeftBottom:
calculatedPosition = transform.Transform(new Point(0.0, target.ActualHeight));
break;
case PositionAlignment.RightTop:
calculatedPosition = transform.Transform(new Point(target.ActualWidth, 0.0));
break;
case PositionAlignment.RightBottom:
calculatedPosition = transform.Transform(new Point(target.ActualWidth, target.ActualHeight));
break;
case PositionAlignment.Center:
calculatedPosition = transform.Transform(calculatedPosition);
x = ((target.ActualWidth * transform.Matrix.M11) - window.Width) / 2.0;
y = ((target.ActualHeight * transform.Matrix.M22) - window.Height) / 2.0;
calculatedPosition.Offset(x, y);
break;
case PositionAlignment.CenterHorizontal:
calculatedPosition = transform.Transform(calculatedPosition);
x = ((target.ActualWidth * transform.Matrix.M11) - window.Width) / 2.0;
calculatedPosition.Offset(x, 0.0);
break;
case PositionAlignment.CenterVertical:
calculatedPosition = transform.Transform(calculatedPosition);
y = ((target.ActualHeight * transform.Matrix.M22) - window.Height) / 2.0;
calculatedPosition.Offset(0.0, y);
break;
default:
Fx.Assert(string.Format(CultureInfo.CurrentCulture, "ExtensionWindowPlacement.Position = '{0}' is not supported", alignment));
return;
}
}
}
SetWindowPosition(window, calculatedPosition);
}
}
public void SelectWindow(ExtensionWindow window)
{
if (null != window && this.Children.Contains(window))
{
this.selectedChild = new KeyValuePair<FrameworkElement, Point>(window, this.canvasOffset);
this.rearangeStartSize.Width = this.ActualWidth;
this.rearangeStartSize.Height = this.ActualHeight;
Panel.SetZIndex(window, ++this.currentZIndex);
}
}
internal void SetSize(ExtensionWindow window, Size size)
{
Point pos = ExtensionSurface.GetPosition(window);
if (!this.AutoExpandCanvas)
{
if (IsGreater(pos.X, size.Width, this.ActualWidth))
{
size.Width = this.ActualWidth - pos.X;
}
if (IsGreater(pos.Y, size.Height, this.ActualHeight))
{
size.Height = this.ActualHeight - pos.Y;
}
}
System.Diagnostics.Debug.WriteLine("SetSize oldSize (" + window.Width + "," + window.Height + ") newSize (" + size.Width + "," + size.Height + ")");
window.Width = size.Width;
window.Height = size.Height;
if (this.AutoExpandCanvas)
{
// this.InvalidateMeasure();
}
}
void EnsureWindowIsVisible(ExtensionWindow window)
{
SetWindowPosition(window, ExtensionSurface.GetPosition(window));
}
internal void SetWindowPosition(ExtensionWindow window, Point position)
{
Func<double, double, double, double, double> CalculateInBoundsValue =
(pos, size, limit, modifier) =>
{
if (this.AutoExpandCanvas)
{
return pos - modifier;
}
else
{
pos = Math.Max(0.0, pos);
return pos + size > limit ? limit - size : pos;
}
};
//in case of AutoExpandCanvas == false:
// - do not allow placing window outside surface bounds
//in case of AutoExpandCanvas == true:
// - include possible negative canvas offset
position.X = CalculateInBoundsValue(position.X, window.DesiredSize.Width, this.ActualWidth, this.selectedChild.Value.X);
position.Y = CalculateInBoundsValue(position.Y, window.DesiredSize.Height, this.ActualHeight, this.selectedChild.Value.Y);
//update its position on canvas
ExtensionSurface.SetPosition(window, position);
bool requiresMeasure = false;
if (this.AutoExpandCanvas)
{
requiresMeasure = true;
this.canvasOffset.X = 0;
this.canvasOffset.Y = 0;
foreach (UIElement item in this.Children)
{
FrameworkElement child = item as FrameworkElement;
if (null != child)
{
Point p = ExtensionSurface.GetPosition(child);
this.canvasOffset.X = Math.Min(this.canvasOffset.X, p.X);
this.canvasOffset.Y = Math.Min(this.canvasOffset.Y, p.Y);
}
}
this.canvasOffset.X = Math.Abs(this.canvasOffset.X);
this.canvasOffset.Y = Math.Abs(this.canvasOffset.Y);
}
if (requiresMeasure)
{
this.InvalidateMeasure();
}
else
{
this.InvalidateArrange();
}
}
void PlaceWindow(ExtensionWindow window)
{
if (null != window)
{
FrameworkElement target = ExtensionSurface.GetPlacementTarget(window);
PositionAlignment alignment = ExtensionSurface.GetAlignment(window);
PlacementMode mode = ExtensionSurface.GetMode(window);
Point position = ExtensionSurface.GetPosition(window);
Point calculatedPosition = new Point();
FrameworkElement commonRoot = null;
MatrixTransform transform = null;
switch (mode)
{
case PlacementMode.Relative:
if (null != target)
{
commonRoot = target.FindCommonVisualAncestor(this) as FrameworkElement;
if (null == commonRoot)
{
return;
}
transform = (MatrixTransform)target.TransformToAncestor(commonRoot);
}
else
{
if (!DesignerProperties.GetIsInDesignMode(this))
{
Fx.Assert(string.Format(CultureInfo.InvariantCulture, "PlacementTarget must be set in RelativeMode on ExtensionSurface '{0}'", this.Name));
}
}
break;
case PlacementMode.Absolute:
calculatedPosition = position;
break;
default:
Fx.Assert(string.Format(CultureInfo.CurrentCulture, "ExtensionWindowPlacement.Mode {0} specified in ExtensionWindow '{1}' is not supported for ExtensionSurface", mode, window.Name));
return;
}
if (PlacementMode.Relative == mode)
{
if (null != target)
{
double x;
double y;
switch (alignment)
{
case PositionAlignment.LeftTop:
calculatedPosition = transform.Transform(calculatedPosition);
break;
case PositionAlignment.LeftBottom:
calculatedPosition = transform.Transform(new Point(0.0, target.ActualHeight));
break;
case PositionAlignment.RightTop:
calculatedPosition = transform.Transform(new Point(target.ActualWidth, 0.0));
break;
case PositionAlignment.RightBottom:
calculatedPosition = transform.Transform(new Point(target.ActualWidth, target.ActualHeight));
break;
case PositionAlignment.Center:
calculatedPosition = transform.Transform(calculatedPosition);
x = ((target.ActualWidth * transform.Matrix.M11) - window.Width) / 2.0;
y = ((target.ActualHeight * transform.Matrix.M22) - window.Height) / 2.0;
calculatedPosition.Offset(x, y);
break;
case PositionAlignment.CenterHorizontal:
calculatedPosition = transform.Transform(calculatedPosition);
x = ((target.ActualWidth * transform.Matrix.M11) - window.Width) / 2.0;
calculatedPosition.Offset(x, 0.0);
break;
case PositionAlignment.CenterVertical:
calculatedPosition = transform.Transform(calculatedPosition);
y = ((target.ActualHeight * transform.Matrix.M22) - window.Height) / 2.0;
calculatedPosition.Offset(0.0, y);
break;
default:
Fx.Assert(string.Format(CultureInfo.CurrentCulture, "ExtensionWindowPlacement.Position = '{0}' is not supported", alignment));
return;
}
}
}
SetWindowPosition(window, calculatedPosition);
}
}
void EnsureWindowIsVisible(ExtensionWindow window)
{
SetWindowPosition(window, ExtensionSurface.GetPosition(window));
}