// IsValid Method for RawMouseActions. Relies on the enum being flags.
internal static bool IsValidRawMouseActions(RawMouseActions actions)
{
if (actions == RawMouseActions.None)
{
return(true);
}
if (((RawMouseActions.AttributesChanged | RawMouseActions.Activate | RawMouseActions.Deactivate |
RawMouseActions.RelativeMove | RawMouseActions.AbsoluteMove | RawMouseActions.VirtualDesktopMove |
RawMouseActions.Button1Press | RawMouseActions.Button1Release |
RawMouseActions.Button2Press | RawMouseActions.Button2Release |
RawMouseActions.Button3Press | RawMouseActions.Button3Release |
RawMouseActions.Button4Press | RawMouseActions.Button4Release |
RawMouseActions.Button5Press | RawMouseActions.Button5Release |
RawMouseActions.VerticalWheelRotate | RawMouseActions.HorizontalWheelRotate |
RawMouseActions.CancelCapture |
RawMouseActions.QueryCursor) & actions) == actions)
{
if (!(((RawMouseActions.Deactivate & actions) == actions && RawMouseActions.Deactivate != actions) ||
(((RawMouseActions.Button1Press | RawMouseActions.Button1Release) & actions) == (RawMouseActions.Button1Press | RawMouseActions.Button1Release)) ||
(((RawMouseActions.Button2Press | RawMouseActions.Button2Release) & actions) == (RawMouseActions.Button2Press | RawMouseActions.Button2Release)) ||
(((RawMouseActions.Button3Press | RawMouseActions.Button3Release) & actions) == (RawMouseActions.Button3Press | RawMouseActions.Button3Release)) ||
(((RawMouseActions.Button4Press | RawMouseActions.Button4Release) & actions) == (RawMouseActions.Button4Press | RawMouseActions.Button4Release)) ||
(((RawMouseActions.Button5Press | RawMouseActions.Button5Release) & actions) == (RawMouseActions.Button5Press | RawMouseActions.Button5Release))))
{
return(true);
}
}
return(false);
}
/// <summary>
/// Constructs ad instance of the RawMouseInputReport class.
/// </summary>
/// <param name="mode">
/// The mode in which the input is being provided.
/// </param>
/// <param name="timestamp">
/// The time when the input occured.
/// </param>
/// <param name="inputSource">
/// The PresentationSource over which the mouse is moved.
/// </param>
/// <param name="actions">
/// The set of actions being reported.
/// </param>
/// <param name="x">
/// If horizontal position being reported.
/// </param>
/// <param name="y">
/// If vertical position being reported.
/// </param>
/// <param name="wheel">
/// If wheel delta being reported.
/// </param>
/// <param name="extraInformation">
/// Any extra information being provided along with the input.
/// </param>
/// <SecurityNote>
/// Critical:This handles critical data in the form of PresentationSource and ExtraInformation
/// TreatAsSafe:There are demands on the critical data(PresentationSource/ExtraInformation)
/// </SecurityNote>
private void RaisePreviewMouseMoveEvent(InputMode mode, RawMouseActions actions, PresentationSource inputSource, RoutedEvent @event, int timestamp, int pointX, int pointY, int wheel)
{
Assembly targetAssembly = Assembly.GetAssembly(typeof(InputEventArgs));
Type mouseInputReportType = targetAssembly.GetType("System.Windows.Input.RawMouseInputReport");
// RawMouseInputReport mouseInputReport = new RawMouseInputReport(...);
Object mouseInputReport = mouseInputReportType.GetConstructors()[0].Invoke(new Object[] {
mode,
timestamp,
inputSource,
actions,
pointX,
pointY,
wheel,
IntPtr.Zero
});
// mouseInputReport._isSynchronize = true;
mouseInputReportType
.GetField("_isSynchronize", BindingFlags.NonPublic | BindingFlags.Instance)
.SetValue(mouseInputReport, true);
// InputReportEventArgs inputReportEventArgs = new InputReportEventArgs(...);
InputEventArgs inputReportEventArgs = (InputEventArgs)targetAssembly
.GetType("System.Windows.Input.InputReportEventArgs")
.GetConstructors()[0]
.Invoke(new Object[] { Mouse.PrimaryDevice, mouseInputReport });
inputReportEventArgs.RoutedEvent = (RoutedEvent)typeof(InputManager)
.GetField("PreviewInputReportEvent", BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static)
.GetValue(null);
//this.RaiseEvent((InputEventArgs)inputReportEventArgs);
InputManager.Current.ProcessInput((InputEventArgs)inputReportEventArgs);
}
public RawMouseInputReport(
InputMode mode,
int timestamp,
PresentationSource inputSource,
RawMouseActions actions,
int x,
int y,
int wheel,
IntPtr extraInformation) : base(inputSource, InputType.Mouse, mode, timestamp)
{
if (!IsValidRawMouseActions(actions))
throw new System.ComponentModel.InvalidEnumArgumentException("actions", (int)actions, typeof(RawMouseActions));
/* we pass a null state from MouseDevice.PreProcessorInput, so null is valid value for state */
_actions = actions;
_x = x;
_y = y;
_wheel = wheel;
_extraInformation = new SecurityCriticalData<IntPtr>(extraInformation);
}
/// <summary>
/// Constructs ad instance of the RawMouseInputReport class.
/// </summary>
/// <param name="mode">
/// The mode in which the input is being provided.
/// </param>
/// <param name="timestamp">
/// The time when the input occured.
/// </param>
/// <param name="inputSource">
/// The PresentationSource over which the mouse is moved.
/// </param>
/// <param name="actions">
/// The set of actions being reported.
/// </param>
/// <param name="x">
/// If horizontal position being reported.
/// </param>
/// <param name="y">
/// If vertical position being reported.
/// </param>
/// <param name="wheel">
/// If wheel delta being reported.
/// </param>
/// <param name="extraInformation">
/// Any extra information being provided along with the input.
/// </param>
public RawMouseInputReport(
InputMode mode,
int timestamp,
PresentationSource inputSource,
RawMouseActions actions,
int x,
int y,
int wheel,
IntPtr extraInformation) : base(inputSource, InputType.Mouse, mode, timestamp)
{
if (!IsValidRawMouseActions(actions))
{
throw new System.ComponentModel.InvalidEnumArgumentException("actions", (int)actions, typeof(RawMouseActions));
}
/* we pass a null state from MouseDevice.PreProcessorInput, so null is valid value for state */
_actions = actions;
_x = x;
_y = y;
_wheel = wheel;
_extraInformation = new SecurityCriticalData <IntPtr>(extraInformation);
}
/// <summary>
/// Construct RawMouseInputReportWrapper with mouse state.
/// </summary>
/// <param name="mode">mode</param>
/// <param name="timestamp">timestamp</param>
/// <param name="inputSource">inputSource</param>
/// <param name="actions">actions</param>
/// <param name="x">x</param>
/// <param name="y">y</param>
/// <param name="wheel">wheel</param>
/// <param name="extraInformation">extraInformation</param>
/// <param name="state">state</param>
public RawMouseInputReportWrapper(InputMode mode, int timestamp, PresentationSource inputSource, RawMouseActions actions, int x, int y, int wheel, IntPtr extraInformation, RawMouseState state)
: base()
{
object[] objArrayInputReportConstructor = new object[] { mode, timestamp, inputSource, actions, x, y, wheel, extraInformation, state };
this.InnerObject = Activator.CreateInstance(ReportType, objArrayInputReportConstructor);
Trace.Assert(this.InnerObject != null, "Uh oh, not an input report");
}
private bool ReportInput(
IntPtr hwnd,
InputMode mode,
int timestamp,
RawMouseActions actions,
int x,
int y,
int wheel)
{
// if there's no HwndSource, we shouldn't get here. But just in case...
Debug.Assert(null != _source && null != _source.Value);
if (_source == null || _source.Value == null)
{
return false;
}
PresentationSource source = _source.Value;
CompositionTarget ct = source.CompositionTarget;
// Input reports should only be generated if the window is still valid.
if(_site == null || source.IsDisposed || ct == null )
{
if(_active)
{
// We are still active, but the window is dead. Force a deactivate.
actions = RawMouseActions.Deactivate;
}
else
{
return false;
}
}
if((actions & RawMouseActions.Deactivate) == RawMouseActions.Deactivate)
{
// Stop tracking the mouse since we are deactivating.
StopTracking(hwnd);
_active = false;
}
else if((actions & RawMouseActions.CancelCapture) == RawMouseActions.CancelCapture)
{
// We have lost capture, but don't do anything else.
}
else if(!_active && (actions & RawMouseActions.VerticalWheelRotate) == RawMouseActions.VerticalWheelRotate)
{
// report mouse wheel events as if they came from the window that
// is under the mouse (even though they are reported to the window
// with keyboard focus)
MouseDevice mouse = _site.Value.CriticalInputManager.PrimaryMouseDevice;
if (mouse != null && mouse.CriticalActiveSource != null)
{
source = mouse.CriticalActiveSource;
}
}
else
{
// If we are not active, we need to activate first.
if(!_active)
{
// But first, check for "spurious" mouse events...
//
// Sometimes we get a mouse move for window "A" AFTER another
// window ("B") has become active. This would cause "A" to think
// that it is active, and to tell Avalon. Now both "A" and "B" think
// they are active, and Avalon thinks "A" is, but REALLY, "B" is.
//
// Confused yet?
//
// To avoid this, if this window ("A") gets a mouse move,
// we verify that either "A" has capture, or the mouse is over "A"
IntPtr hwndToCheck = SafeNativeMethods.GetCapture();
if(hwnd != hwndToCheck)
{
// If we get this far, "A" does NOT have capture
// - now ensure mouse is over "A"
NativeMethods.POINT ptCursor = new NativeMethods.POINT();
try
{
UnsafeNativeMethods.GetCursorPos(ptCursor);
}
catch(System.ComponentModel.Win32Exception)
{
// Sometimes Win32 will fail this call, such as if you are
// not running in the interactive desktop. For example,
// a secure screen saver may be running.
System.Diagnostics.Debug.WriteLine("HwndMouseInputProvider: GetCursorPos failed!");
}
try
{
hwndToCheck = UnsafeNativeMethods.WindowFromPoint(ptCursor.x, ptCursor.y);
}
catch(System.ComponentModel.Win32Exception)
{
System.Diagnostics.Debug.WriteLine("HwndMouseInputProvider: WindowFromPoint failed!");
}
if(hwnd != hwndToCheck)
{
// If we get this far:
// - the mouse is NOT over "A"
// - "A" does NOT have capture
// We consider this a "spurious" mouse move and ignore it. (Win32 bug?)
System.Diagnostics.Debug.WriteLine("HwndMouseInputProvider: Spurious mouse event received!");
return false;
}
}
// We need to collect the current state of the mouse.
// Include the activation action.
actions |= RawMouseActions.Activate;
// Remember that we are active.
_active = true;
_lastX = x;
_lastY = y;
//Console.WriteLine("Activating the mouse.");
}
// Make sure we are tracking the mouse so we know when it
// leaves the window.
StartTracking(hwnd);
// Even if a move isn't explicitly reported, we still may need to
// report one if the coordinates are different. This is to cover
// some ugly edge cases with context menus and such.
if((actions & RawMouseActions.AbsoluteMove) == 0)
{
if(x != _lastX || y != _lastY)
{
actions |= RawMouseActions.AbsoluteMove;
}
}
else
{
_lastX = x;
_lastY = y;
}
// record mouse motion so that GetIntermediatePoints has the
// information it needs
if ((actions & RawMouseActions.AbsoluteMove) != 0)
{
RecordMouseMove(x, y, _msgTime);
}
// MITIGATION: WIN32_AND_AVALON_RTL
//
// When a window is marked with the WS_EX_LAYOUTRTL style, Win32
// mirrors the coordinates received for mouse movement as well as
// mirroring the output of drawing to a GDI DC.
//
// Avalon also sets up mirroring transforms so that we properly
// mirror the output since we render to DirectX, not a GDI DC.
//
// Unfortunately, this means that our input is already mirrored
// by Win32, and Avalon mirrors it again. To work around this
// problem, we un-mirror the input from Win32 before passing
// it into Avalon.
//
if((actions & (RawMouseActions.AbsoluteMove | RawMouseActions.Activate)) != 0)
{
try
{
//This has a SUC on it and accesses CriticalHandle
int windowStyle = SafeNativeMethods.GetWindowStyle(new HandleRef(this, _source.Value.CriticalHandle), true);
if((windowStyle & NativeMethods.WS_EX_LAYOUTRTL) == NativeMethods.WS_EX_LAYOUTRTL)
{
NativeMethods.RECT rcClient = new NativeMethods.RECT();
SafeNativeMethods.GetClientRect(new HandleRef(this,_source.Value.Handle), ref rcClient);
x = rcClient.right - x;
}
}
catch(System.ComponentModel.Win32Exception)
{
System.Diagnostics.Debug.WriteLine("HwndMouseInputProvider: GetWindowStyle or GetClientRect failed!");
}
}
}
// Get the extra information sent along with the message.
//There exists a SUC for this native method call
IntPtr extraInformation = IntPtr.Zero;
try
{
extraInformation = UnsafeNativeMethods.GetMessageExtraInfo();
}
catch(System.ComponentModel.Win32Exception)
{
System.Diagnostics.Debug.WriteLine("HwndMouseInputProvider: GetMessageExtraInfo failed!");
}
RawMouseInputReport report = new RawMouseInputReport(mode,
timestamp,
source,
actions,
x,
y,
wheel,
extraInformation);
bool handled = _site.Value.ReportInput(report);
return handled;
}
// IsValid Method for RawMouseActions. Relies on the enum being flags.
internal static bool IsValidRawMouseActions(RawMouseActions actions)
{
if (actions == RawMouseActions.None)
return true;
if ((( RawMouseActions.AttributesChanged | RawMouseActions.Activate | RawMouseActions.Deactivate |
RawMouseActions.RelativeMove | RawMouseActions.AbsoluteMove | RawMouseActions.VirtualDesktopMove |
RawMouseActions.Button1Press | RawMouseActions.Button1Release |
RawMouseActions.Button2Press | RawMouseActions.Button2Release |
RawMouseActions.Button3Press | RawMouseActions.Button3Release |
RawMouseActions.Button4Press | RawMouseActions.Button4Release |
RawMouseActions.Button5Press | RawMouseActions.Button5Release |
RawMouseActions.VerticalWheelRotate | RawMouseActions.HorizontalWheelRotate |
RawMouseActions.CancelCapture |
RawMouseActions.QueryCursor) & actions) == actions)
{
if (!(((RawMouseActions.Deactivate & actions) == actions && RawMouseActions.Deactivate != actions ) ||
(((RawMouseActions.Button1Press | RawMouseActions.Button1Release) & actions) == (RawMouseActions.Button1Press | RawMouseActions.Button1Release)) ||
(((RawMouseActions.Button2Press | RawMouseActions.Button2Release) & actions) == (RawMouseActions.Button2Press | RawMouseActions.Button2Release)) ||
(((RawMouseActions.Button3Press | RawMouseActions.Button3Release) & actions) == (RawMouseActions.Button3Press | RawMouseActions.Button3Release)) ||
(((RawMouseActions.Button4Press | RawMouseActions.Button4Release) & actions) == (RawMouseActions.Button4Press | RawMouseActions.Button4Release)) ||
(((RawMouseActions.Button5Press | RawMouseActions.Button5Release) & actions) == (RawMouseActions.Button5Press | RawMouseActions.Button5Release))))
{
return true;
}
}
return false;
}
private RawMouseActions GetNonRedundantActions(NotifyInputEventArgs e)
{
RawMouseActions actions = new RawMouseActions();
// The CLR throws a null-ref exception if it tries to unbox a
// null. So we have to special case that.
object o = e.StagingItem.GetData(_tagNonRedundantActions);
if (o != null)
{
actions = (RawMouseActions) o;
}
return actions;
}
// This is used to determine whether we postpone promoting mouse move events
// from stylus events.
internal void SetLastRawMouseActions(RawMouseActions actions)
{
_lastRawMouseAction = actions;
}
internal bool UpdateMouseButtonState(RawMouseActions actions)
{
bool updated = false;
switch (actions)
{
case RawMouseActions.Button1Press:
if (_mouseLeftButtonState != MouseButtonState.Pressed)
{
updated = true;
_mouseLeftButtonState = MouseButtonState.Pressed;
}
break;
case RawMouseActions.Button1Release:
if (_mouseLeftButtonState != MouseButtonState.Released)
{
updated = true;
_mouseLeftButtonState = MouseButtonState.Released;
}
break;
case RawMouseActions.Button2Press:
if (_mouseRightButtonState != MouseButtonState.Pressed)
{
updated = true;
_mouseRightButtonState = MouseButtonState.Pressed;
}
break;
case RawMouseActions.Button2Release:
if (_mouseRightButtonState != MouseButtonState.Released)
{
updated = true;
_mouseRightButtonState = MouseButtonState.Released;
}
break;
}
return updated;
}
protected override IntPtr WndProc(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
switch ((WindowMessage)msg)
{
case WindowMessage.LeftButtonDown:
Interop.SetFocus(hWnd);
RaiseEvent(new MouseButtonEventArgs(Mouse.PrimaryDevice, 0, MouseButton.Left)
{
RoutedEvent = Mouse.MouseDownEvent,
Source = this,
});
break;
case WindowMessage.LeftButtonUp:
RaiseEvent(new MouseButtonEventArgs(Mouse.PrimaryDevice, 0, MouseButton.Left)
{
RoutedEvent = Mouse.MouseUpEvent,
Source = this,
});
break;
case WindowMessage.RightButtonDown:
RaiseEvent(new MouseButtonEventArgs(Mouse.PrimaryDevice, 0, MouseButton.Right)
{
RoutedEvent = Mouse.MouseDownEvent,
Source = this,
});
break;
case WindowMessage.RightButtonUp:
RaiseEvent(new MouseButtonEventArgs(Mouse.PrimaryDevice, 0, MouseButton.Right)
{
RoutedEvent = Mouse.MouseUpEvent,
Source = this,
});
break;
case WindowMessage.MouseMove: {
int x = LOWORD(lParam.ToInt32());
int y = HIWORD(lParam.ToInt32());
Point p = this.TransformToAncestor(Application.Current.MainWindow).Transform(new Point(0, 0));
RawMouseActions actions = RawMouseActions.Activate | RawMouseActions.AbsoluteMove;
RaisePreviewMouseMoveEvent(
InputMode.Foreground,
actions,
PresentationSource.FromVisual(this),
Mouse.MouseMoveEvent,
Environment.TickCount, (int)(x + p.X), (int)(y + p.Y), 0);
RaiseEvent(new MouseEventArgs(Mouse.PrimaryDevice, 0)
{
RoutedEvent = Mouse.MouseMoveEvent,
Source = this
});
}
break;
case WindowMessage.MouseWheel:
short delta;
switch (IntPtr.Size)
{
case 8:
delta = (short)(wParam.ToInt64() >> 16);
break;
case 4:
delta = (short)(wParam.ToInt32() >> 16);
break;
default:
delta = 0;
break;
}
RaiseEvent(new MouseWheelEventArgs(Mouse.PrimaryDevice, 0, delta)
{
RoutedEvent = Mouse.MouseWheelEvent,
Source = this
});
break;
case WindowMessage.LeftButtonDoubleClick: {
RaiseEvent(new MouseButtonEventArgs(Mouse.PrimaryDevice, 0, MouseButton.Left)
{
RoutedEvent = Control.MouseDoubleClickEvent,
Source = doubleClickControl,
});
}
break;
case WindowMessage.RightButtonDoubleClick:
RaiseEvent(new MouseButtonEventArgs(Mouse.PrimaryDevice, 0, MouseButton.Right)
{
RoutedEvent = Control.MouseDoubleClickEvent,
Source = this,
});
break;
case WindowMessage.MiddleButtonDoubleClick:
RaiseEvent(new MouseButtonEventArgs(Mouse.PrimaryDevice, 0, MouseButton.Middle)
{
RoutedEvent = Control.MouseDoubleClickEvent,
Source = this,
});
break;
default:
return(base.WndProc(hWnd, msg, wParam, lParam, ref handled));
}
//handled = true;
return(IntPtr.Zero);
}