Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / System / Windows / Input / Stylus / StylusTouchDevice.cs / 1305600 / StylusTouchDevice.cs
//----------------------------------------------------------------------------
//
// Copyright (C) Microsoft Corporation. All rights reserved.
//
//---------------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.Windows;
using System.Windows.Input;
using System.Windows.Media;
using System.Security;
using System.Security.Permissions;
using MS.Internal;
namespace System.Windows.Input
{
///
/// The implementation of a TouchDevice specific to StylusDevice.
///
internal sealed class StylusTouchDevice : TouchDevice
{
#region TouchDevice Implementation
///
/// Critical: Accesses critical _stylusLogic and InputManager
/// TreatAsSafe: This constructor handles critical data but does not expose it
///
[SecurityCritical, SecurityTreatAsSafe]
internal StylusTouchDevice(StylusDevice stylusDevice)
: base(stylusDevice.Id)
{
_stylusDevice = stylusDevice;
_stylusLogic = InputManager.UnsecureCurrent.StylusLogic;
PromotingToOther = true;
}
///
/// Provides the current position.
///
/// Defines the coordinate space.
/// The current position in the coordinate space of relativeTo.
public override TouchPoint GetTouchPoint(IInputElement relativeTo)
{
Point position = _stylusDevice.GetPosition(relativeTo);
Rect rectBounds = GetBounds(_stylusDevice.RawStylusPoint, position, relativeTo);
return new TouchPoint(this, position, rectBounds, _lastAction);
}
private Rect GetBounds(StylusPoint stylusPoint, Point position, IInputElement relativeTo)
{
GeneralTransform elementToRoot;
GeneralTransform rootToElement;
GetRootTransforms(relativeTo, out elementToRoot, out rootToElement);
return GetBounds(stylusPoint, position, relativeTo, elementToRoot, rootToElement);
}
private Rect GetBounds(StylusPoint stylusPoint,
Point position,
IInputElement relativeTo,
GeneralTransform elementToRoot,
GeneralTransform rootToElement)
{
// Get width and heith in pixel value
double width = GetStylusPointWidthOrHeight(stylusPoint, /*isWidth*/ true);
double height = GetStylusPointWidthOrHeight(stylusPoint, /*isWidth*/ false);
// Get the position with respect to root
Point rootPoint;
if (elementToRoot == null ||
!elementToRoot.TryTransform(position, out rootPoint))
{
rootPoint = position;
}
// Create a Rect with respect to root and transform it to element coordinate space
Rect rectBounds = new Rect(rootPoint.X - width * 0.5, rootPoint.Y - height * 0.5, width, height);
if (rootToElement != null)
{
rectBounds = rootToElement.TransformBounds(rectBounds);
}
return rectBounds;
}
private double GetStylusPointWidthOrHeight(StylusPoint stylusPoint, bool isWidth)
{
const double CentimeterPerInch = 2.54d;
const double PixelPerInch = 96d;
StylusPointProperty property = (isWidth ? StylusPointProperties.Width : StylusPointProperties.Height);
double value = 0d;
if (stylusPoint.HasProperty(property))
{
// Get the property value in the corresponding units
value = (double)stylusPoint.GetPropertyValue(property);
StylusPointPropertyInfo propertyInfo = stylusPoint.Description.GetPropertyInfo(property);
if (!DoubleUtil.AreClose(propertyInfo.Resolution, 0d))
{
value /= propertyInfo.Resolution;
}
else
{
value = 0;
}
// Convert the value to Inches
if (propertyInfo.Unit == StylusPointPropertyUnit.Centimeters)
{
value /= CentimeterPerInch;
}
// Convert the value to pixels
value *= PixelPerInch;
}
return value;
}
///
/// Provides all of the known points the device hit since the last reported position update.
///
/// Defines the coordinate space.
/// A list of points in the coordinate space of relativeTo.
public override TouchPointCollection GetIntermediateTouchPoints(IInputElement relativeTo)
{
// Retrieve the stylus points
StylusPointCollection stylusPoints = _stylusDevice.GetStylusPoints(relativeTo, _stylusPointDescription);
int count = stylusPoints.Count;
TouchPointCollection touchPoints = new TouchPointCollection();
GeneralTransform elementToRoot;
GeneralTransform rootToElement;
GetRootTransforms(relativeTo, out elementToRoot, out rootToElement);
// Convert the stylus points into touch points
for (int i = 0; i < count; i++)
{
StylusPoint stylusPoint = stylusPoints[i];
Point position = new Point(stylusPoint.X, stylusPoint.Y);
Rect rectBounds = GetBounds(stylusPoint, position, relativeTo, elementToRoot, rootToElement);
TouchPoint touchPoint = new TouchPoint(this, position, rectBounds, _lastAction);
touchPoints.Add(touchPoint);
}
return touchPoints;
}
///
/// Critical - Calls PresentationSource.CriticalFromVisual.
/// TreatAsSafe - Does not expose PresentationSource.
///
[SecurityCritical, SecurityTreatAsSafe]
private void GetRootTransforms(IInputElement relativeTo, out GeneralTransform elementToRoot, out GeneralTransform rootToElement)
{
elementToRoot = rootToElement = null;
DependencyObject containingVisual = InputElement.GetContainingVisual(relativeTo as DependencyObject);
if (containingVisual != null)
{
PresentationSource relativePresentationSource = PresentationSource.CriticalFromVisual(containingVisual);
Visual rootVisual = (relativePresentationSource != null) ? relativePresentationSource.RootVisual : null;
Visual containingVisual2D = VisualTreeHelper.GetContainingVisual2D(containingVisual);
if ((rootVisual != null) && (containingVisual2D != null))
{
elementToRoot = containingVisual2D.TransformToAncestor(rootVisual);
rootToElement = rootVisual.TransformToDescendant(containingVisual2D);
}
}
}
#endregion
#region StylusLogic Related
protected override void OnManipulationStarted()
{
base.OnManipulationStarted();
PromotingToOther = false;
}
///
/// Critical: Accesses _stylusLogic and _storedStagingAreaItems
/// and calls StylusLogic.PromoteStoredItemsToMouse
/// PublicOK: This method has a demand on it.
/// Demand: Technically the demand is not needed because the
/// user can already do this indirectly by canceling the
/// manipulation. But the decision is to limit the scope
/// of this raw method to full trust.
///
[SecurityCritical, UIPermissionAttribute(SecurityAction.LinkDemand, Unrestricted = true)]
protected override void OnManipulationEnded(bool cancel)
{
base.OnManipulationEnded(cancel);
if (cancel)
{
// Set PromotingToOther to true because the
// the manipulation has been canceled and hence
// we want the promotions to happen.
PromotingToOther = true;
_stylusLogic.PromoteStoredItemsToMouse(this);
}
else
{
// Set PromotingToOther to false because we
// dont want any mouse promotions to happen for
// rest of this touch cycle.
PromotingToOther = false;
}
if (_storedStagingAreaItems != null)
{
_storedStagingAreaItems.Clear();
}
}
///
/// Whether input associated with this device is being promoted to some other device.
///
internal bool PromotingToOther
{
get;
private set;
}
///
/// Stored items that occurred during the time before we knew where to promote to.
///
///
/// Critical: The items stored in this collection will be promoted to mouse.
///
internal IList StoredStagingAreaItems
{
[SecurityCritical]
get
{
if (_storedStagingAreaItems == null)
{
_storedStagingAreaItems = new List();
}
return _storedStagingAreaItems;
}
}
///
/// The associated StylusDevice
///
internal StylusDevice StylusDevice
{
get
{
return _stylusDevice;
}
}
///
/// Critical - Setting the ActiveSource on the device.
///
[SecurityCritical]
internal void ChangeActiveSource(PresentationSource activeSource)
{
SetActiveSource(activeSource);
}
///
/// Critical: Accesses _stylusLogic. Could be TreatAsSafe
/// because doesn't expose _stylusLogic itself.
///
[SecurityCritical]
internal void OnActivate()
{
Activate();
_activeDeviceCount++;
if (_activeDeviceCount == 1)
{
_isPrimary = true;
_stylusLogic.CurrentMousePromotionStylusDevice = _stylusDevice;
}
PromotingToOther = true;
}
///
/// Critical: Accesses _stylusLogic and _storedStagingAreaItems.
/// Clears _storedStagingAreaItems collection which
/// stores the staging items to be promoted to mouse.
/// Could be TreatAsSafe because doesn't expose the
/// objects themselves.
///
[SecurityCritical]
internal void OnDeactivate()
{
Deactivate();
if (_storedStagingAreaItems != null)
{
_storedStagingAreaItems.Clear();
}
PromotingToOther = true;
DownHandled = false;
_activeDeviceCount--;
if (_activeDeviceCount == 0)
{
_stylusLogic.CurrentMousePromotionStylusDevice = null;
}
else if (_isPrimary)
{
_stylusLogic.CurrentMousePromotionStylusDevice = NoMousePromotionStylusDevice;
}
_isPrimary = false;
}
internal bool OnDown()
{
_lastAction = TouchAction.Down;
DownHandled = ReportDown();
return DownHandled;
}
internal bool OnMove()
{
_lastAction = TouchAction.Move;
return ReportMove();
}
internal bool OnUp()
{
_lastAction = TouchAction.Up;
return ReportUp();
}
///
/// Bool indicates if down event was handled
///
internal bool DownHandled
{
get;
private set;
}
#endregion
#region Data
private StylusDevice _stylusDevice;
///
/// Critical: To prevent accidental spread to transparent code
///
[SecurityCritical]
private StylusLogic _stylusLogic;
///
/// Critical: Holds the staging items to be promoted to mouse.
///
[SecurityCritical]
private List _storedStagingAreaItems;
private TouchAction _lastAction = TouchAction.Move;
private bool _isPrimary = false;
[ThreadStatic]
private static int _activeDeviceCount = 0;
private static readonly StylusPointPropertyInfo[] _stylusPropertyInfos =
new StylusPointPropertyInfo[]
{
StylusPointPropertyInfoDefaults.X,
StylusPointPropertyInfoDefaults.Y,
StylusPointPropertyInfoDefaults.NormalPressure,
StylusPointPropertyInfoDefaults.Width,
StylusPointPropertyInfoDefaults.Height
};
private static readonly StylusPointDescription _stylusPointDescription = new StylusPointDescription(_stylusPropertyInfos);
private static object NoMousePromotionStylusDevice = new object();
#endregion
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
//----------------------------------------------------------------------------
//
// Copyright (C) Microsoft Corporation. All rights reserved.
//
//---------------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.Windows;
using System.Windows.Input;
using System.Windows.Media;
using System.Security;
using System.Security.Permissions;
using MS.Internal;
namespace System.Windows.Input
{
///
/// The implementation of a TouchDevice specific to StylusDevice.
///
internal sealed class StylusTouchDevice : TouchDevice
{
#region TouchDevice Implementation
///
/// Critical: Accesses critical _stylusLogic and InputManager
/// TreatAsSafe: This constructor handles critical data but does not expose it
///
[SecurityCritical, SecurityTreatAsSafe]
internal StylusTouchDevice(StylusDevice stylusDevice)
: base(stylusDevice.Id)
{
_stylusDevice = stylusDevice;
_stylusLogic = InputManager.UnsecureCurrent.StylusLogic;
PromotingToOther = true;
}
///
/// Provides the current position.
///
/// Defines the coordinate space.
/// The current position in the coordinate space of relativeTo.
public override TouchPoint GetTouchPoint(IInputElement relativeTo)
{
Point position = _stylusDevice.GetPosition(relativeTo);
Rect rectBounds = GetBounds(_stylusDevice.RawStylusPoint, position, relativeTo);
return new TouchPoint(this, position, rectBounds, _lastAction);
}
private Rect GetBounds(StylusPoint stylusPoint, Point position, IInputElement relativeTo)
{
GeneralTransform elementToRoot;
GeneralTransform rootToElement;
GetRootTransforms(relativeTo, out elementToRoot, out rootToElement);
return GetBounds(stylusPoint, position, relativeTo, elementToRoot, rootToElement);
}
private Rect GetBounds(StylusPoint stylusPoint,
Point position,
IInputElement relativeTo,
GeneralTransform elementToRoot,
GeneralTransform rootToElement)
{
// Get width and heith in pixel value
double width = GetStylusPointWidthOrHeight(stylusPoint, /*isWidth*/ true);
double height = GetStylusPointWidthOrHeight(stylusPoint, /*isWidth*/ false);
// Get the position with respect to root
Point rootPoint;
if (elementToRoot == null ||
!elementToRoot.TryTransform(position, out rootPoint))
{
rootPoint = position;
}
// Create a Rect with respect to root and transform it to element coordinate space
Rect rectBounds = new Rect(rootPoint.X - width * 0.5, rootPoint.Y - height * 0.5, width, height);
if (rootToElement != null)
{
rectBounds = rootToElement.TransformBounds(rectBounds);
}
return rectBounds;
}
private double GetStylusPointWidthOrHeight(StylusPoint stylusPoint, bool isWidth)
{
const double CentimeterPerInch = 2.54d;
const double PixelPerInch = 96d;
StylusPointProperty property = (isWidth ? StylusPointProperties.Width : StylusPointProperties.Height);
double value = 0d;
if (stylusPoint.HasProperty(property))
{
// Get the property value in the corresponding units
value = (double)stylusPoint.GetPropertyValue(property);
StylusPointPropertyInfo propertyInfo = stylusPoint.Description.GetPropertyInfo(property);
if (!DoubleUtil.AreClose(propertyInfo.Resolution, 0d))
{
value /= propertyInfo.Resolution;
}
else
{
value = 0;
}
// Convert the value to Inches
if (propertyInfo.Unit == StylusPointPropertyUnit.Centimeters)
{
value /= CentimeterPerInch;
}
// Convert the value to pixels
value *= PixelPerInch;
}
return value;
}
///
/// Provides all of the known points the device hit since the last reported position update.
///
/// Defines the coordinate space.
/// A list of points in the coordinate space of relativeTo.
public override TouchPointCollection GetIntermediateTouchPoints(IInputElement relativeTo)
{
// Retrieve the stylus points
StylusPointCollection stylusPoints = _stylusDevice.GetStylusPoints(relativeTo, _stylusPointDescription);
int count = stylusPoints.Count;
TouchPointCollection touchPoints = new TouchPointCollection();
GeneralTransform elementToRoot;
GeneralTransform rootToElement;
GetRootTransforms(relativeTo, out elementToRoot, out rootToElement);
// Convert the stylus points into touch points
for (int i = 0; i < count; i++)
{
StylusPoint stylusPoint = stylusPoints[i];
Point position = new Point(stylusPoint.X, stylusPoint.Y);
Rect rectBounds = GetBounds(stylusPoint, position, relativeTo, elementToRoot, rootToElement);
TouchPoint touchPoint = new TouchPoint(this, position, rectBounds, _lastAction);
touchPoints.Add(touchPoint);
}
return touchPoints;
}
///
/// Critical - Calls PresentationSource.CriticalFromVisual.
/// TreatAsSafe - Does not expose PresentationSource.
///
[SecurityCritical, SecurityTreatAsSafe]
private void GetRootTransforms(IInputElement relativeTo, out GeneralTransform elementToRoot, out GeneralTransform rootToElement)
{
elementToRoot = rootToElement = null;
DependencyObject containingVisual = InputElement.GetContainingVisual(relativeTo as DependencyObject);
if (containingVisual != null)
{
PresentationSource relativePresentationSource = PresentationSource.CriticalFromVisual(containingVisual);
Visual rootVisual = (relativePresentationSource != null) ? relativePresentationSource.RootVisual : null;
Visual containingVisual2D = VisualTreeHelper.GetContainingVisual2D(containingVisual);
if ((rootVisual != null) && (containingVisual2D != null))
{
elementToRoot = containingVisual2D.TransformToAncestor(rootVisual);
rootToElement = rootVisual.TransformToDescendant(containingVisual2D);
}
}
}
#endregion
#region StylusLogic Related
protected override void OnManipulationStarted()
{
base.OnManipulationStarted();
PromotingToOther = false;
}
///
/// Critical: Accesses _stylusLogic and _storedStagingAreaItems
/// and calls StylusLogic.PromoteStoredItemsToMouse
/// PublicOK: This method has a demand on it.
/// Demand: Technically the demand is not needed because the
/// user can already do this indirectly by canceling the
/// manipulation. But the decision is to limit the scope
/// of this raw method to full trust.
///
[SecurityCritical, UIPermissionAttribute(SecurityAction.LinkDemand, Unrestricted = true)]
protected override void OnManipulationEnded(bool cancel)
{
base.OnManipulationEnded(cancel);
if (cancel)
{
// Set PromotingToOther to true because the
// the manipulation has been canceled and hence
// we want the promotions to happen.
PromotingToOther = true;
_stylusLogic.PromoteStoredItemsToMouse(this);
}
else
{
// Set PromotingToOther to false because we
// dont want any mouse promotions to happen for
// rest of this touch cycle.
PromotingToOther = false;
}
if (_storedStagingAreaItems != null)
{
_storedStagingAreaItems.Clear();
}
}
///
/// Whether input associated with this device is being promoted to some other device.
///
internal bool PromotingToOther
{
get;
private set;
}
///
/// Stored items that occurred during the time before we knew where to promote to.
///
///
/// Critical: The items stored in this collection will be promoted to mouse.
///
internal IList StoredStagingAreaItems
{
[SecurityCritical]
get
{
if (_storedStagingAreaItems == null)
{
_storedStagingAreaItems = new List();
}
return _storedStagingAreaItems;
}
}
///
/// The associated StylusDevice
///
internal StylusDevice StylusDevice
{
get
{
return _stylusDevice;
}
}
///
/// Critical - Setting the ActiveSource on the device.
///
[SecurityCritical]
internal void ChangeActiveSource(PresentationSource activeSource)
{
SetActiveSource(activeSource);
}
///
/// Critical: Accesses _stylusLogic. Could be TreatAsSafe
/// because doesn't expose _stylusLogic itself.
///
[SecurityCritical]
internal void OnActivate()
{
Activate();
_activeDeviceCount++;
if (_activeDeviceCount == 1)
{
_isPrimary = true;
_stylusLogic.CurrentMousePromotionStylusDevice = _stylusDevice;
}
PromotingToOther = true;
}
///
/// Critical: Accesses _stylusLogic and _storedStagingAreaItems.
/// Clears _storedStagingAreaItems collection which
/// stores the staging items to be promoted to mouse.
/// Could be TreatAsSafe because doesn't expose the
/// objects themselves.
///
[SecurityCritical]
internal void OnDeactivate()
{
Deactivate();
if (_storedStagingAreaItems != null)
{
_storedStagingAreaItems.Clear();
}
PromotingToOther = true;
DownHandled = false;
_activeDeviceCount--;
if (_activeDeviceCount == 0)
{
_stylusLogic.CurrentMousePromotionStylusDevice = null;
}
else if (_isPrimary)
{
_stylusLogic.CurrentMousePromotionStylusDevice = NoMousePromotionStylusDevice;
}
_isPrimary = false;
}
internal bool OnDown()
{
_lastAction = TouchAction.Down;
DownHandled = ReportDown();
return DownHandled;
}
internal bool OnMove()
{
_lastAction = TouchAction.Move;
return ReportMove();
}
internal bool OnUp()
{
_lastAction = TouchAction.Up;
return ReportUp();
}
///
/// Bool indicates if down event was handled
///
internal bool DownHandled
{
get;
private set;
}
#endregion
#region Data
private StylusDevice _stylusDevice;
///
/// Critical: To prevent accidental spread to transparent code
///
[SecurityCritical]
private StylusLogic _stylusLogic;
///
/// Critical: Holds the staging items to be promoted to mouse.
///
[SecurityCritical]
private List _storedStagingAreaItems;
private TouchAction _lastAction = TouchAction.Move;
private bool _isPrimary = false;
[ThreadStatic]
private static int _activeDeviceCount = 0;
private static readonly StylusPointPropertyInfo[] _stylusPropertyInfos =
new StylusPointPropertyInfo[]
{
StylusPointPropertyInfoDefaults.X,
StylusPointPropertyInfoDefaults.Y,
StylusPointPropertyInfoDefaults.NormalPressure,
StylusPointPropertyInfoDefaults.Width,
StylusPointPropertyInfoDefaults.Height
};
private static readonly StylusPointDescription _stylusPointDescription = new StylusPointDescription(_stylusPropertyInfos);
private static object NoMousePromotionStylusDevice = new object();
#endregion
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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