HitTestFilterBehavior HitTestFilter(DependencyObject potentialHit)
{
if (this.tabHitTesting)
{
TabItem item = potentialHit as TabItem;
if (item != null && item.Visibility == Visibility.Visible && item.DataContext is LayoutDefinition)
{
this.hitTestTabItem = item;
return(HitTestFilterBehavior.Stop);
}
return(HitTestFilterBehavior.Continue);
}
else
{
ViewDockSpot spot = potentialHit as ViewDockSpot;
if (spot != null && spot.IsHitTestVisible)
{
this.hitTestSpot = spot;
return(HitTestFilterBehavior.Stop);
}
return(HitTestFilterBehavior.Continue);
}
}
HitTestFilterBehavior HitTestFilter(DependencyObject potentialHit)
{
if (this.tabHitTesting)
{
TabItem item = potentialHit as TabItem;
if (item != null && item.Visibility == Visibility.Visible && item.DataContext is LayoutDefinition)
{
this.hitTestTabItem = item;
return HitTestFilterBehavior.Stop;
}
return HitTestFilterBehavior.Continue;
}
else
{
ViewDockSpot spot = potentialHit as ViewDockSpot;
if (spot != null && spot.IsHitTestVisible)
{
this.hitTestSpot = spot;
return HitTestFilterBehavior.Stop;
}
return HitTestFilterBehavior.Continue;
}
}
void UpdateHitState(Point pos)
{
LayoutControl targetLayout = this.CurrentLayout;
bool ghostPositionSet = false;
this.dockTargetSlot = null;
this.dragGhostWindow.CancelReason = "To place the view, drag over an empty layout, an existing view, or a docking target.";
if (targetLayout != null)
{
var posInLayout = Mouse.GetPosition(targetLayout);
var rect = new Rect(0, 0, targetLayout.ActualWidth, targetLayout.ActualHeight);
if (rect.Contains(posInLayout))
{
this.dockTargetSlot = targetLayout.GetSlotUnderPoint(Mouse.GetPosition(targetLayout));
}
else
{
targetLayout = null;
}
if (this.dockTargetSlot != null)
{
if (this.creatorBeingDragged != null)
{
if (this.creatorBeingDragged.Category.DocumentFactoryName != null &&
targetLayout.LayoutInstance.LayoutDefinition.DocumentFactoryName != this.creatorBeingDragged.Category.DocumentFactoryName)
{
// The creator being dragged is affinitized with a particular document type which is not the same type as the active
// layout. Disallow the drop.
this.dockTargetSlot = null;
this.dragGhostWindow.CancelReason = string.Format(CultureInfo.InvariantCulture, "This view can only be placed in a {0} layout.", this.creatorBeingDragged.Category.DisplayName);
}
else if (this.creatorBeingDragged.Command.IsSingleInstancePerLayout &&
(targetLayout.LayoutInstance.LayoutDefinition.ViewSources.Any(vs => vs.ViewCreator == this.creatorBeingDragged.Command)))
{
// This is a single-instance-per-layout view that already exists in the layout. No dice.
this.dockTargetSlot = null;
this.dragGhostWindow.CancelReason = "Only one instance of this view type can exist in a layout.";
}
else if (this.creatorBeingDragged.Command.IsSingleInstance)
{
var existingSource = ToolsUIApplication.Instance.LayoutDefinitions.SelectMany(d => d.ViewSources).Where(vs => vs.ViewCreator == this.creatorBeingDragged.Command).FirstOrDefault();
if (existingSource != null)
{
// This is a single-instance view that already exists in a layout (perhaps not even this one).
this.dockTargetSlot = null;
this.dragGhostWindow.CancelReason = string.Format(CultureInfo.InvariantCulture,
"This view already exists in the '{0}' layout. Only one instance of this view type can be created.", existingSource.Parent.Header);
}
}
}
}
}
if (this.dockTargetSlot != null)
{
this.layout = targetLayout;
if (this.dockTargetWindow == null)
{
this.dockTargetWindow = new ViewDropTargetWindow();
}
var rect = targetLayout.GetSlotScreenRect(this.dockTargetSlot);
this.dockTargetWindow.Left = rect.X;
this.dockTargetWindow.Top = rect.Y;
this.dockTargetWindow.Width = rect.Width;
this.dockTargetWindow.Height = rect.Height;
this.dockTargetWindow.IsTabbedSpotVisible = true;
this.dockTargetWindow.RootSlot = targetLayout.LayoutInstance.LayoutDefinition.SlotDefinition;
this.dockTargetWindow.TargetSlot = this.dockTargetSlot;
this.dockTargetWindow.AreDockSpotsVisible = targetLayout.LayoutInstance.LayoutDefinition.ViewSources.Count > 0;
this.dockTargetWindow.Show();
this.hitTestSpot = null;
this.tabHitTesting = false;
VisualTreeHelper.HitTest(this.dockTargetWindow, this.HitTestFilter, this.HitTestResult, new PointHitTestParameters(Mouse.GetPosition(this.dockTargetWindow)));
if (this.hitTestSpot != null)
{
var spot = this.hitTestSpot;
if (spot != null && spot.DestinationSlot != null)
{
rect = targetLayout.GetSlotScreenRect(spot.DestinationSlot);
this.dragGhostWindow.CancelMode = false;
this.dragGhostWindow.CancelReason = null;
if (spot.IsTabbed)
{
this.dragGhostWindow.Left = rect.X;
this.dragGhostWindow.Top = rect.Y;
this.dragGhostWindow.Width = rect.Width;
this.dragGhostWindow.Height = rect.Height;
}
else
{
switch (spot.Dock)
{
case Dock.Top:
this.dragGhostWindow.Left = rect.X;
this.dragGhostWindow.Top = rect.Y;
this.dragGhostWindow.Width = rect.Width;
this.dragGhostWindow.Height = rect.Height / 2;
break;
case Dock.Bottom:
this.dragGhostWindow.Width = rect.Width;
this.dragGhostWindow.Height = rect.Height / 2;
this.dragGhostWindow.Left = rect.X;
this.dragGhostWindow.Top = rect.Y + this.dragGhostWindow.Height;
break;
case Dock.Left:
this.dragGhostWindow.Left = rect.X;
this.dragGhostWindow.Top = rect.Y;
this.dragGhostWindow.Width = rect.Width / 2;
this.dragGhostWindow.Height = rect.Height;
break;
case Dock.Right:
this.dragGhostWindow.Width = rect.Width / 2;
this.dragGhostWindow.Height = rect.Height;
this.dragGhostWindow.Left = rect.X + this.dragGhostWindow.Width;
this.dragGhostWindow.Top = rect.Y;
break;
}
}
ghostPositionSet = true;
}
}
else
{
// Didn't even hit the tabbed spot (the transparent rect covering the whole slot), so must be in
// the margin. Tear down the dock target window. (Won't flicker because it fades in...)
this.dockTargetWindow.Close();
this.dockTargetWindow = null;
this.dockTargetSlot = null;
}
}
else
{
if (this.dockTargetWindow != null)
{
this.dockTargetWindow.Close();
this.dockTargetWindow = null;
}
this.layout = null;
// See if the mouse is over a layout tab. If so, select it.
this.tabHitTesting = true;
this.hitTestTabItem = null;
VisualTreeHelper.HitTest(this.tabControl, this.HitTestFilter, this.HitTestResult, new PointHitTestParameters(Mouse.GetPosition(this.tabControl)));
if (this.hitTestTabItem != null)
{
var layoutDef = this.hitTestTabItem.DataContext as LayoutDefinition;
if (layoutDef != null)
{
this.tabControl.SelectedItem = layoutDef;
}
}
}
if (!ghostPositionSet)
{
this.dragGhostWindow.Width = 200;
this.dragGhostWindow.Height = 200;
this.dragGhostWindow.Left = pos.X;
this.dragGhostWindow.Top = pos.Y;
this.dragGhostWindow.CancelMode = true;
}
}
void UpdateHitState(Point pos)
{
LayoutControl targetLayout = this.CurrentLayout;
bool ghostPositionSet = false;
this.dockTargetSlot = null;
this.dragGhostWindow.CancelReason = "To place the view, drag over an empty layout, an existing view, or a docking target.";
if (targetLayout != null)
{
var posInLayout = Mouse.GetPosition(targetLayout);
var rect = new Rect(0, 0, targetLayout.ActualWidth, targetLayout.ActualHeight);
if (rect.Contains(posInLayout))
{
this.dockTargetSlot = targetLayout.GetSlotUnderPoint(Mouse.GetPosition(targetLayout));
}
else
{
targetLayout = null;
}
if (this.dockTargetSlot != null)
{
if (this.creatorBeingDragged != null)
{
if (this.creatorBeingDragged.Category.DocumentFactoryName != null &&
targetLayout.LayoutInstance.LayoutDefinition.DocumentFactoryName != this.creatorBeingDragged.Category.DocumentFactoryName)
{
// The creator being dragged is affinitized with a particular document type which is not the same type as the active
// layout. Disallow the drop.
this.dockTargetSlot = null;
this.dragGhostWindow.CancelReason = string.Format(CultureInfo.InvariantCulture, "This view can only be placed in a {0} layout.", this.creatorBeingDragged.Category.DisplayName);
}
else if (this.creatorBeingDragged.Command.IsSingleInstancePerLayout &&
(targetLayout.LayoutInstance.LayoutDefinition.ViewSources.Any(vs => vs.ViewCreator == this.creatorBeingDragged.Command)))
{
// This is a single-instance-per-layout view that already exists in the layout. No dice.
this.dockTargetSlot = null;
this.dragGhostWindow.CancelReason = "Only one instance of this view type can exist in a layout.";
}
else if (this.creatorBeingDragged.Command.IsSingleInstance)
{
var existingSource = ToolsUIApplication.Instance.LayoutDefinitions.SelectMany(d => d.ViewSources).Where(vs => vs.ViewCreator == this.creatorBeingDragged.Command).FirstOrDefault();
if (existingSource != null)
{
// This is a single-instance view that already exists in a layout (perhaps not even this one).
this.dockTargetSlot = null;
this.dragGhostWindow.CancelReason = string.Format(CultureInfo.InvariantCulture,
"This view already exists in the '{0}' layout. Only one instance of this view type can be created.", existingSource.Parent.Header);
}
}
}
}
}
if (this.dockTargetSlot != null)
{
this.layout = targetLayout;
if (this.dockTargetWindow == null)
{
this.dockTargetWindow = new ViewDropTargetWindow();
}
var rect = targetLayout.GetSlotScreenRect(this.dockTargetSlot);
this.dockTargetWindow.Left = rect.X;
this.dockTargetWindow.Top = rect.Y;
this.dockTargetWindow.Width = rect.Width;
this.dockTargetWindow.Height = rect.Height;
this.dockTargetWindow.IsTabbedSpotVisible = true;
this.dockTargetWindow.RootSlot = targetLayout.LayoutInstance.LayoutDefinition.SlotDefinition;
this.dockTargetWindow.TargetSlot = this.dockTargetSlot;
this.dockTargetWindow.AreDockSpotsVisible = targetLayout.LayoutInstance.LayoutDefinition.ViewSources.Count > 0;
this.dockTargetWindow.Show();
this.hitTestSpot = null;
this.tabHitTesting = false;
VisualTreeHelper.HitTest(this.dockTargetWindow, this.HitTestFilter, this.HitTestResult, new PointHitTestParameters(Mouse.GetPosition(this.dockTargetWindow)));
if (this.hitTestSpot != null)
{
var spot = this.hitTestSpot;
if (spot != null && spot.DestinationSlot != null)
{
rect = targetLayout.GetSlotScreenRect(spot.DestinationSlot);
this.dragGhostWindow.CancelMode = false;
this.dragGhostWindow.CancelReason = null;
if (spot.IsTabbed)
{
this.dragGhostWindow.Left = rect.X;
this.dragGhostWindow.Top = rect.Y;
this.dragGhostWindow.Width = rect.Width;
this.dragGhostWindow.Height = rect.Height;
}
else
{
switch (spot.Dock)
{
case Dock.Top:
this.dragGhostWindow.Left = rect.X;
this.dragGhostWindow.Top = rect.Y;
this.dragGhostWindow.Width = rect.Width;
this.dragGhostWindow.Height = rect.Height / 2;
break;
case Dock.Bottom:
this.dragGhostWindow.Width = rect.Width;
this.dragGhostWindow.Height = rect.Height / 2;
this.dragGhostWindow.Left = rect.X;
this.dragGhostWindow.Top = rect.Y + this.dragGhostWindow.Height;
break;
case Dock.Left:
this.dragGhostWindow.Left = rect.X;
this.dragGhostWindow.Top = rect.Y;
this.dragGhostWindow.Width = rect.Width / 2;
this.dragGhostWindow.Height = rect.Height;
break;
case Dock.Right:
this.dragGhostWindow.Width = rect.Width / 2;
this.dragGhostWindow.Height = rect.Height;
this.dragGhostWindow.Left = rect.X + this.dragGhostWindow.Width;
this.dragGhostWindow.Top = rect.Y;
break;
}
}
ghostPositionSet = true;
}
}
else
{
// Didn't even hit the tabbed spot (the transparent rect covering the whole slot), so must be in
// the margin. Tear down the dock target window. (Won't flicker because it fades in...)
this.dockTargetWindow.Close();
this.dockTargetWindow = null;
this.dockTargetSlot = null;
}
}
else
{
if (this.dockTargetWindow != null)
{
this.dockTargetWindow.Close();
this.dockTargetWindow = null;
}
this.layout = null;
// See if the mouse is over a layout tab. If so, select it.
this.tabHitTesting = true;
this.hitTestTabItem = null;
VisualTreeHelper.HitTest(this.tabControl, this.HitTestFilter, this.HitTestResult, new PointHitTestParameters(Mouse.GetPosition(this.tabControl)));
if (this.hitTestTabItem != null)
{
var layoutDef = this.hitTestTabItem.DataContext as LayoutDefinition;
if (layoutDef != null)
{
this.tabControl.SelectedItem = layoutDef;
}
}
}
if (!ghostPositionSet)
{
this.dragGhostWindow.Width = 200;
this.dragGhostWindow.Height = 200;
this.dragGhostWindow.Left = pos.X;
this.dragGhostWindow.Top = pos.Y;
this.dragGhostWindow.CancelMode = true;
}
}