internal GeneralTransform2DTo3D(GeneralTransform transform2D,
Viewport2DVisual3D containingVisual3D,
GeneralTransform3D transform3D)
{
Visual child = containingVisual3D.Visual;
Debug.Assert(child != null, "Going from 2D to 3D containingVisual3D.Visual should not be null");
_transform3D = (GeneralTransform3D)transform3D.GetCurrentValueAsFrozen();
// we also need to go one more level up to handle a transform being placed
// on the Viewport2DVisual3D's child
GeneralTransformGroup transformGroup = new GeneralTransformGroup();
transformGroup.Children.Add((GeneralTransform)transform2D.GetCurrentValueAsFrozen());
transformGroup.Children.Add((GeneralTransform)child.TransformToOuterSpace().GetCurrentValueAsFrozen());
transformGroup.Freeze();
_transform2D = transformGroup;
_positions = containingVisual3D.InternalPositionsCache;
_textureCoords = containingVisual3D.InternalTextureCoordinatesCache;
_triIndices = containingVisual3D.InternalTriangleIndicesCache;
_childBounds = child.CalculateSubgraphRenderBoundsOuterSpace();
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="visual3D">The Visual3D that contains the 2D visual</param>
/// <param name="fromVisual">The visual on the Visual3D</param>
internal GeneralTransform2DTo3DTo2D(Viewport2DVisual3D visual3D, Visual fromVisual)
{
IsInverse = false;
// get a copy of the geometry information - we store our own model to reuse hit
// test code on the GeometryModel3D
_geometry = new MeshGeometry3D();
_geometry.Positions = visual3D.InternalPositionsCache;
_geometry.TextureCoordinates = visual3D.InternalTextureCoordinatesCache;
_geometry.TriangleIndices = visual3D.InternalTriangleIndicesCache;
_geometry.Freeze();
Visual visual3Dchild = visual3D.Visual;
// Special case - Setting CacheMode on V2DV3D causes an internal switch from using a VisualBrush
// to using a BitmapCacheBrush. It also introduces an extra 2D Visual in the Visual tree above
// the V2DV3D.Visual, but this extra node has no effect on transforms and can safely be ignored.
// The transform returned will be identical to the one created for calling TransformTo* with
// the V2DV3D.Visual itself.
Visual descendentVisual = (fromVisual == visual3Dchild._parent) ? visual3Dchild : fromVisual;
// get a copy of the size of the visual brush and the rect on the
// visual that the transform is going to/from
_visualBrushBounds = visual3Dchild.CalculateSubgraphRenderBoundsOuterSpace();
_visualBounds = descendentVisual.CalculateSubgraphRenderBoundsInnerSpace();
// get the transform that will let us go from the fromVisual to its last 2D
// parent before it reaches the 3D part of the graph (i.e. visual3D.Child)
GeneralTransformGroup transformGroup = new GeneralTransformGroup();
transformGroup.Children.Add(descendentVisual.TransformToAncestor(visual3Dchild));
transformGroup.Children.Add(visual3Dchild.TransformToOuterSpace());
transformGroup.Freeze();
_transform2D = transformGroup;
// store the inverse as well
_transform2DInverse = (GeneralTransform)_transform2D.Inverse;
if (_transform2DInverse != null)
{
_transform2DInverse.Freeze();
}
// make a copy of the camera and other values on the Viewport3D
Viewport3DVisual viewport3D = (Viewport3DVisual)VisualTreeHelper.GetContainingVisual2D(visual3D);
_camera = viewport3D.Camera;
if (_camera != null)
{
_camera = (Camera)viewport3D.Camera.GetCurrentValueAsFrozen();
}
_viewSize = viewport3D.Viewport.Size;
_boundingRect = viewport3D.ComputeSubgraphBounds3D();
_objectToViewport = visual3D.TransformToAncestor(viewport3D);
// if the transform was not possible, it could be null - check before freezing
if (_objectToViewport != null)
{
_objectToViewport.Freeze();
}
// store the needed transformations for the various operations
_worldTransformation = M3DUtil.GetWorldTransformationMatrix(visual3D);
_validEdgesCache = null;
}
internal void InvokeStylusPluginCollection(RawStylusInputReport inputReport)
{
// Find PenContexts object for this inputReport.
StylusPlugInCollection pic = null;
// lock to make sure only one event is processed at a time and no changes to state can
// be made until we finish routing this event.
lock(__rtiLock)
{
switch (inputReport.Actions)
{
case RawStylusActions.Down:
case RawStylusActions.Move:
case RawStylusActions.Up:
// Figure out current target plugincollection.
pic = TargetPlugInCollection(inputReport);
break;
default:
return; // Nothing to do unless one of the above events
}
StylusPlugInCollection currentPic = inputReport.StylusDevice.CurrentNonVerifiedTarget;
// Fire Leave event if we need to.
if (currentPic != null && currentPic != pic)
{
// Create new RawStylusInput to send
GeneralTransformGroup transformTabletToView = new GeneralTransformGroup();
transformTabletToView.Children.Add(new MatrixTransform(_stylusLogic.GetTabletToViewTransform(inputReport.StylusDevice.TabletDevice))); // this gives matrix in measured units (not device)
transformTabletToView.Children.Add(currentPic.ViewToElement); // Make it relative to the element.
transformTabletToView.Freeze(); // Must be frozen for multi-threaded access.
RawStylusInput tempRawStylusInput = new RawStylusInput(inputReport, transformTabletToView, currentPic);
currentPic.FireEnterLeave(false, tempRawStylusInput, false);
inputReport.StylusDevice.CurrentNonVerifiedTarget = null;
}
if (pic != null)
{
// NOTE: PenContext info will not change (it gets rebuilt instead so keeping ref is fine)
// The transformTabletToView matrix and plugincollection rects though can change based
// off of layout events which is why we need to lock this.
GeneralTransformGroup transformTabletToView = new GeneralTransformGroup();
transformTabletToView.Children.Add(new MatrixTransform(_stylusLogic.GetTabletToViewTransform(inputReport.StylusDevice.TabletDevice))); // this gives matrix in measured units (not device)
transformTabletToView.Children.Add(pic.ViewToElement); // Make it relative to the element.
transformTabletToView.Freeze(); // Must be frozen for multi-threaded access.
RawStylusInput rawStylusInput = new RawStylusInput(inputReport, transformTabletToView, pic);
inputReport.RawStylusInput = rawStylusInput;
if (pic != currentPic)
{
inputReport.StylusDevice.CurrentNonVerifiedTarget = pic;
pic.FireEnterLeave(true, rawStylusInput, false);
}
// We are on the pen thread, just call directly.
pic.FireRawStylusInput(rawStylusInput);
}
} // lock(__rtiLock)
}
/// <summary>
/// The returned matrix can be used to transform coordinates from this Visual to
/// the specified Visual.
/// Returns null if no such transform exists due to a non-invertible Transform.
/// </summary>
/// <exception cref="ArgumentNullException">If visual is null.</exception>
/// <exception cref="InvalidOperationException">If the Visuals are not connected.</exception>
public GeneralTransform TransformToVisual(Visual visual)
{
DependencyObject ancestor = FindCommonVisualAncestor(visual);
Visual ancestorAsVisual = ancestor as Visual;
if (ancestorAsVisual == null)
{
throw new System.InvalidOperationException(SR.Get(SRID.Visual_NoCommonAncestor));
}
GeneralTransform g0;
Matrix m0;
bool isSimple0 = this.TrySimpleTransformToAncestor(ancestorAsVisual,
false,
out g0,
out m0);
GeneralTransform g1;
Matrix m1;
bool isSimple1 = visual.TrySimpleTransformToAncestor(ancestorAsVisual,
true,
out g1,
out m1);
// combine the transforms
// if both transforms are simple Matrix transforms, just multiply them and
// return the result.
if (isSimple0 && isSimple1)
{
MatrixUtil.MultiplyMatrix(ref m0, ref m1);
MatrixTransform m = new MatrixTransform(m0);
m.Freeze();
return m;
}
// Handle the case where 0 is simple and 1 is complex.
if (isSimple0)
{
g0 = new MatrixTransform(m0);
g0.Freeze();
}
else if (isSimple1)
{
g1 = new MatrixTransform(m1);
g1.Freeze();
}
// If inverse was requested, TrySimpleTransformToAncestor can return null
// add the transform only if it is not null
if (g1 != null)
{
GeneralTransformGroup group = new GeneralTransformGroup();
group.Children.Add(g0);
group.Children.Add(g1);
group.Freeze();
return group;
}
return g0;
}
private void VerifyStylusPlugInCollectionTarget(RawStylusInputReport rawStylusInputReport)
{
switch (rawStylusInputReport.Actions)
{
case RawStylusActions.Down:
case RawStylusActions.Move:
case RawStylusActions.Up:
break;
default:
return; // do nothing if not Down, Move or Up.
}
RawStylusInput originalRSI = rawStylusInputReport.RawStylusInput;
// See if we have a plugin for the target of this input.
StylusPlugInCollection targetPIC = null;
StylusPlugInCollection targetRtiPIC = (originalRSI != null) ? originalRSI.Target : null;
bool updateEventPoints = false;
// Make sure we use UIElement for target if non NULL and hit ContentElement.
UIElement newTarget = InputElement.GetContainingUIElement(rawStylusInputReport.StylusDevice.DirectlyOver as DependencyObject) as UIElement;
if (newTarget != null)
{
targetPIC = rawStylusInputReport.PenContext.Contexts.FindPlugInCollection(newTarget);
}
// Make sure any lock() calls do not reenter on us.
using(Dispatcher.DisableProcessing())
{
// See if we hit the wrong PlugInCollection on the pen thread and clean things up if we did.
if (targetRtiPIC != null && targetRtiPIC != targetPIC && originalRSI != null)
{
// Fire custom data not confirmed events for both pre and post since bad target...
foreach (RawStylusInputCustomData customData in originalRSI.CustomDataList)
{
customData.Owner.FireCustomData(customData.Data, rawStylusInputReport.Actions, false);
}
updateEventPoints = originalRSI.StylusPointsModified;
// Clear RawStylusInput data.
rawStylusInputReport.RawStylusInput = null;
}
// See if we need to build up an RSI to send to the plugincollection (due to a mistarget).
bool sendRawStylusInput = false;
if (targetPIC != null && rawStylusInputReport.RawStylusInput == null)
{
// NOTE: PenContext info will not change (it gets rebuilt instead so keeping ref is fine)
// The transformTabletToView matrix and plugincollection rects though can change based
// off of layout events which is why we need to lock this.
GeneralTransformGroup transformTabletToView = new GeneralTransformGroup();
transformTabletToView.Children.Add(new MatrixTransform(GetTabletToViewTransform(rawStylusInputReport.StylusDevice.TabletDevice))); // this gives matrix in measured units (not device)
transformTabletToView.Children.Add(targetPIC.ViewToElement); // Make it relative to the element.
transformTabletToView.Freeze(); // Must be frozen for multi-threaded access.
RawStylusInput rawStylusInput = new RawStylusInput(rawStylusInputReport, transformTabletToView, targetPIC);
rawStylusInputReport.RawStylusInput = rawStylusInput;
sendRawStylusInput = true;
}
// Now fire the confirmed enter/leave events as necessary.
StylusPlugInCollection currentTarget = rawStylusInputReport.StylusDevice.CurrentVerifiedTarget;
if (targetPIC != currentTarget)
{
if (currentTarget != null)
{
// Fire leave event. If we never had a plugin for this event then create a temp one.
if (originalRSI == null)
{
GeneralTransformGroup transformTabletToView = new GeneralTransformGroup();
transformTabletToView.Children.Add(new MatrixTransform(GetTabletToViewTransform(rawStylusInputReport.StylusDevice.TabletDevice))); // this gives matrix in measured units (not device)
transformTabletToView.Children.Add(currentTarget.ViewToElement); // Make it relative to the element.
transformTabletToView.Freeze(); // Must be frozen for multi-threaded access.
originalRSI = new RawStylusInput(rawStylusInputReport, transformTabletToView, currentTarget);
}
currentTarget.FireEnterLeave(false, originalRSI, true);
}
if (targetPIC != null)
{
// Fire Enter event
targetPIC.FireEnterLeave(true, rawStylusInputReport.RawStylusInput, true);
}
// Update the verified target.
rawStylusInputReport.StylusDevice.CurrentVerifiedTarget = targetPIC;
}
// Now fire RawStylusInput if needed to the right plugincollection.
if (sendRawStylusInput)
{
// We are on the pen thread, just call directly.
targetPIC.FireRawStylusInput(rawStylusInputReport.RawStylusInput);
updateEventPoints = (updateEventPoints || rawStylusInputReport.RawStylusInput.StylusPointsModified);
}
// Now fire PrePreviewCustomData events.
if (targetPIC != null)
{
// Send custom data pre event
foreach (RawStylusInputCustomData customData in rawStylusInputReport.RawStylusInput.CustomDataList)
{
customData.Owner.FireCustomData(customData.Data, rawStylusInputReport.Actions, true);
}
}
// VerifyRawTarget might resend to correct plugins or may have hit the wrong plugincollection. The StylusPackets
// may be overriden in those plugins so we need to call UpdateEventStylusPoints to update things.
if (updateEventPoints)
{
rawStylusInputReport.StylusDevice.UpdateEventStylusPoints(rawStylusInputReport, true);
}
}
}
