/// <summary>
/// Determines if this mouse event is a promoted event based on the extra information
/// given from the WM_MOUSE message. Windows guarantees that any promotions have this
/// extra information and legacy engines (such as WISP in Windows 7) set the precedent
/// for this, so it has been and can be relied on.
/// </summary>
/// <param name="mouseInputReport">The raw mouse input to check</param>
/// <returns>True if this is a promoted mouse event, false otherwise.</returns>
internal static bool IsPromotedMouseEvent(RawMouseInputReport mouseInputReport)
{
int mouseExtraInfo = NativeMethods.IntPtrToInt32(mouseInputReport.ExtraInformation);
return((mouseExtraInfo & PromotedMouseEventMask) == PromotedMouseEventTag); // MI_WP_SIGNATURE
}
/// <summary>
/// Retrieves the cursor id from a promoted mouse message
/// </summary>
/// <param name="mouseInputReport">THe input report</param>
/// <returns>THe cursor id if promoted, 0 if pure mouse (by definition)</returns>
internal static uint GetCursorIdFromMouseEvent(RawMouseInputReport mouseInputReport)
{
int mouseExtraInfo = NativeMethods.IntPtrToInt32(mouseInputReport.ExtraInformation);
return((uint)(mouseExtraInfo & PromotedMouseEventCursorIdMask));
}
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;
}
internal void PlayBackCachedDownInputReport(int timestamp)
{
if (_needToSendMouseDown)
{
// if we have marked this as handled we need to play the down otherwise we can ignore the down
// as it will be process anyway and either way we need to clean up the cached down
PresentationSource mouseInputSource = GetMousePresentationSource();
if (mouseInputSource != null)
{
Point pt = PointUtil.ScreenToClient(_lastMouseScreenLocation, mouseInputSource);
_needToSendMouseDown = false; // We've sent down, don't send again.
// Update the state we report to the mouse (GetButtonState).
_promotedMouseState = MouseButtonState.Pressed;
RawMouseActions actions = _fLeftButtonDownTrigger?RawMouseActions.Button1Press:RawMouseActions.Button2Press;
// StylusLogic manages the mouse state reported to the MouseDevice to deal with multiple stylusdevice input.
if (_stylusLogic.UpdateMouseButtonState(actions))
{
// See if we need to set the Mouse Activate flag.
InputManager inputManager = (InputManager)Dispatcher.InputManager;
if (inputManager != null)
{
if (inputManager.PrimaryMouseDevice.CriticalActiveSource != mouseInputSource)
{
actions |= RawMouseActions.Activate;
}
}
// Update the last event we've sent through.
_stylusLogic.SetLastRawMouseActions(actions);
RawMouseInputReport mouseInputReport = new RawMouseInputReport(
InputMode.Foreground, timestamp, mouseInputSource,
actions,
(int)pt.X, (int)pt.Y, 0, IntPtr.Zero);
InputReportEventArgs inputReportArgs = new InputReportEventArgs(this, mouseInputReport);
inputReportArgs.RoutedEvent=InputManager.PreviewInputReportEvent;
_stylusLogic.InputManagerProcessInputEventArgs(inputReportArgs);
}
}
_needToSendMouseDown = false; // so we don't try and resend it later.
}
}
private void PreProcessInput(object sender, PreProcessInputEventArgs e)
{
if (e.StagingItem.Input.RoutedEvent == InputManager.PreviewInputReportEvent)
{
InputReportEventArgs inputReportEventArgs = e.StagingItem.Input as InputReportEventArgs;
if (!inputReportEventArgs.Handled && inputReportEventArgs.Report.Type == InputType.Mouse)
{
RawMouseInputReport rawMouseInputReport = (RawMouseInputReport)inputReportEventArgs.Report;
// Normally we only process mouse input that is from our
// active visual manager. The only exception to this is
// the activate report, which is how we change the visual
// manager that is active.
if ((rawMouseInputReport.Actions & RawMouseActions.Activate) == RawMouseActions.Activate)
{
// Console.WriteLine("RawMouseActions.Activate");
// If other actions are being reported besides the
// activate, separate them into different events.
if ((rawMouseInputReport.Actions & ~RawMouseActions.Activate) != 0)
{
// Cancel this event. We'll push a new event for the activate.
e.Cancel();
// Push a new RawMouseInputReport for the non-activate actions.
RawMouseInputReport reportActions = new RawMouseInputReport(rawMouseInputReport.Mode,
rawMouseInputReport.Timestamp,
rawMouseInputReport.InputSource,
rawMouseInputReport.Actions & ~RawMouseActions.Activate,
rawMouseInputReport.X,
rawMouseInputReport.Y,
rawMouseInputReport.Wheel,
rawMouseInputReport.ExtraInformation);
InputReportEventArgs actionsArgs = new InputReportEventArgs(inputReportEventArgs.Device, reportActions);
actionsArgs.RoutedEvent=InputManager.PreviewInputReportEvent;
e.PushInput(actionsArgs, null);
// Create a new RawMouseInputReport for the activate.
RawMouseInputReport reportActivate = new RawMouseInputReport(rawMouseInputReport.Mode,
rawMouseInputReport.Timestamp,
rawMouseInputReport.InputSource,
RawMouseActions.Activate,
rawMouseInputReport.X,
rawMouseInputReport.Y,
rawMouseInputReport.Wheel,
rawMouseInputReport.ExtraInformation);
// Push a new RawMouseInputReport for the activate.
InputReportEventArgs activateArgs = new InputReportEventArgs(inputReportEventArgs.Device, reportActivate);
activateArgs.RoutedEvent=InputManager.PreviewInputReportEvent;
e.PushInput(activateArgs, null);
}
}
// Only process mouse input that is from our active PresentationSource.
else if ((_inputSource != null) && (rawMouseInputReport.InputSource == _inputSource.Value))
{
// We need to remember the StylusDevice that generated this input. Use the _tagStylusDevice
// to store this in before we take over the inputReport Device and loose it. Any
// input reports we re-push need to preserve this too. This is used to set the StylusDevice
// property on MouseEventArgs.
InputDevice inputDevice = e.StagingItem.GetData(_tagStylusDevice) as StylusDevice;
if (inputDevice == null)
{
inputDevice = inputReportEventArgs.Device as StylusDevice;
if (inputDevice != null)
{
e.StagingItem.SetData(_tagStylusDevice, inputDevice);
}
}
// Claim the input for the mouse.
inputReportEventArgs.Device = this;
// If the input is reporting mouse deactivation, we need
// to ensure that the element receives a final leave.
// Note that activation could have been moved to another
// visual manager in our app, which means that the leave
// was already sent. So only do this if the deactivate
// event is from the visual manager that we think is active.
if ((rawMouseInputReport.Actions & RawMouseActions.Deactivate) == RawMouseActions.Deactivate)
{
if (_mouseOver != null)
{
// Push back this event, and cancel the current processing.
e.PushInput(e.StagingItem);
e.Cancel();
_isPhysicallyOver = false;
ChangeMouseOver(null, e.StagingItem.Input.Timestamp);
}
}
// If the input is reporting mouse movement, we need to check
// if we need to update our sense of "mouse over".
//
if ((rawMouseInputReport.Actions & RawMouseActions.AbsoluteMove) == RawMouseActions.AbsoluteMove)
{
// If other actions are being reported besides the
// move, separate them into different events.
if ((rawMouseInputReport.Actions & ~(RawMouseActions.AbsoluteMove | RawMouseActions.QueryCursor)) != 0)
{
// Cancel this event. We'll push a new event for the move.
e.Cancel();
// Push a new RawMouseInputReport for the non-move actions.
RawMouseInputReport reportActions = new RawMouseInputReport(rawMouseInputReport.Mode,
rawMouseInputReport.Timestamp,
rawMouseInputReport.InputSource,
rawMouseInputReport.Actions & ~(RawMouseActions.AbsoluteMove | RawMouseActions.QueryCursor),
0,
0,
rawMouseInputReport.Wheel,
rawMouseInputReport.ExtraInformation);
InputReportEventArgs actionsArgs = new InputReportEventArgs(inputDevice, reportActions);
actionsArgs.RoutedEvent=InputManager.PreviewInputReportEvent;
e.PushInput(actionsArgs, null);
// Push a new RawMouseInputReport for the AbsoluteMove.
RawMouseInputReport reportMove = new RawMouseInputReport(rawMouseInputReport.Mode,
rawMouseInputReport.Timestamp,
rawMouseInputReport.InputSource,
rawMouseInputReport.Actions & (RawMouseActions.AbsoluteMove | RawMouseActions.QueryCursor),
rawMouseInputReport.X,
rawMouseInputReport.Y,
0,
IntPtr.Zero);
InputReportEventArgs moveArgs = new InputReportEventArgs(inputDevice, reportMove);
moveArgs.RoutedEvent=InputManager.PreviewInputReportEvent;
e.PushInput(moveArgs, null);
}
else
{
// Convert the point from client coordinates into "root" coordinates.
// We do this in the pre-process stage because it is possible that
// this conversion will fail, in which case we want to cancel the
// mouse move event.
bool success = true;
Point ptClient = new Point(rawMouseInputReport.X, rawMouseInputReport.Y);
Point ptRoot = PointUtil.TryClientToRoot(ptClient, rawMouseInputReport.InputSource, false, out success);
if(success)
{
e.StagingItem.SetData(_tagRootPoint, ptRoot);
}
else
{
e.Cancel();
}
}
}
}
}
}
else
{
// All mouse event processing should only happen if we still have an active input source.
if (_inputSource != null)
{
if (e.StagingItem.Input.RoutedEvent == Mouse.PreviewMouseDownEvent)
{
MouseButtonEventArgs mouseButtonEventArgs = e.StagingItem.Input as MouseButtonEventArgs;
if (_mouseCapture != null && !_isPhysicallyOver)
{
// The mouse is not physically over the capture point (or
// subtree), so raise the PreviewMouseDownOutsideCapturedElement
// event first.
MouseButtonEventArgs clickThrough = new MouseButtonEventArgs(this, mouseButtonEventArgs.Timestamp, mouseButtonEventArgs.ChangedButton, GetStylusDevice(e.StagingItem));
clickThrough.RoutedEvent=Mouse.PreviewMouseDownOutsideCapturedElementEvent;
//ProcessInput has a linkdemand
_inputManager.Value.ProcessInput(clickThrough);
}
}
else if (e.StagingItem.Input.RoutedEvent == Mouse.PreviewMouseUpEvent)
{
MouseButtonEventArgs mouseButtonEventArgs = e.StagingItem.Input as MouseButtonEventArgs;
if (_mouseCapture != null && !_isPhysicallyOver)
{
// The mouse is not physically over the capture point (or
// subtree), so raise the PreviewMouseUpOutsideCapturedElement
// event first.
MouseButtonEventArgs clickThrough = new MouseButtonEventArgs(this, mouseButtonEventArgs.Timestamp, mouseButtonEventArgs.ChangedButton, GetStylusDevice(e.StagingItem));
clickThrough.RoutedEvent=Mouse.PreviewMouseUpOutsideCapturedElementEvent;
//ProcessInput has a linkdemand
_inputManager.Value.ProcessInput(clickThrough);
}
}
}
}
}
public void Synchronize()
{
// System.Console.WriteLine("Synchronize");
// VerifyAccess();
// Simulate a mouse move
PresentationSource activeSource = CriticalActiveSource;
if (activeSource != null && activeSource.CompositionTarget != null && !activeSource.CompositionTarget.IsDisposed)
{
int timeStamp = Environment.TickCount;
Point ptClient = GetClientPosition();
RawMouseInputReport report = new RawMouseInputReport(InputMode.Foreground,
timeStamp,
activeSource,
RawMouseActions.AbsoluteMove,
(int) ptClient.X,
(int) ptClient.Y,
0,
IntPtr.Zero);
report._isSynchronize = true;
InputReportEventArgs inputReportEventArgs;
if (_stylusDevice != null)
{
// if we have a current stylusdevice .. use it
inputReportEventArgs = new InputReportEventArgs(_stylusDevice, report);
}
else
{
inputReportEventArgs = new InputReportEventArgs(this, report);
}
inputReportEventArgs.RoutedEvent=InputManager.PreviewInputReportEvent;
//ProcessInput has a linkdemand
_inputManager.Value.ProcessInput(inputReportEventArgs);
}
}
private void PreProcessInput(object sender, PreProcessInputEventArgs e)
{
if (_inputEnabled)
{
if(e.StagingItem.Input.RoutedEvent == InputManager.PreviewInputReportEvent)
{
InputReportEventArgs input = e.StagingItem.Input as InputReportEventArgs;
if(input != null && !input.Handled)
{
// See if we are in a DragDrop operation. If so set our internal flag
// which stops us from promoting Stylus or Mouse events!
if (_inDragDrop != _inputManager.Value.InDragDrop)
{
_inDragDrop = _inputManager.Value.InDragDrop;
// If we are going out of DragDrop then we need to re [....] the mouse state
// if we have a stylus device in range (otherwise we [....] on the next
// stylus coming in range).
if (!_inDragDrop && _stylusDeviceInRange)
{
UpdateMouseState();
}
}
if (input.Report.Type == InputType.Mouse)
{
// If we see a non stylus mouse event (not triggered from stylus event)
if ((input.Device as StylusDevice) == null)
{
// And we only do work if we are enabled for stylus input (ie - have tablet devices)
if (TabletDevices.Count != 0)
{
RawMouseInputReport mouseInputReport = (RawMouseInputReport) input.Report;
RawMouseActions actions = mouseInputReport.Actions;
int mouseExtraInfo = NativeMethods.IntPtrToInt32(mouseInputReport.ExtraInformation);
bool fromWisptis = (mouseExtraInfo & 0xFFFFFF00) == 0xFF515700; // MI_WP_SIGNATURE
// Grab the stylus info if from wisptis
if (fromWisptis)
{
_lastMouseMoveFromStylus = true;
// Grab the current stylus Id out of the extra info.
_lastStylusDeviceId = (mouseExtraInfo & 0x000000FF);
}
// If mouse is getting deactivated and StylusOver is non null then force stylusover to null.
if ((actions & RawMouseActions.Deactivate) == RawMouseActions.Deactivate)
{
_seenRealMouseActivate = false;
if (CurrentStylusDevice != null)
{
PenContexts penContexts = GetPenContextsFromHwnd(mouseInputReport.InputSource);
// If we are inRange still then defer the Deactivate call till we are OutOfRange.
if (_stylusDeviceInRange && !_inDragDrop && (penContexts == null || !penContexts.IsWindowDisabled))
{
_mouseDeactivateInputReport = mouseInputReport;
e.Cancel();
input.Handled = true;
return;
}
#if !MULTICAPTURE
else if (CurrentStylusDevice.DirectlyOver != null)
#else
else
#endif
{
MouseDevice mouseDevice = _inputManager.Value.PrimaryMouseDevice;
if (mouseDevice.CriticalActiveSource == mouseInputReport.InputSource)
{
#if !MULTICAPTURE
// Update over to be null when deactivating.
CurrentStylusDevice.ChangeStylusOver(null);
#else
lock (__stylusDeviceLock)
{
foreach (var pair in __stylusDeviceMap)
{
var currentDevice = pair.Value;
if (currentDevice.DirectlyOver != null)
{
// Update over to be null when deactivating.
currentDevice.ChangeStylusOver(null);
}
}
}
#endif
}
}
}
}
// See if we got some mouse input we need to check for consistency (not tagged from wisptis)
else if ((actions & RawMouseActions.CancelCapture) != 0)
{
// We need to resend this back through as coming from a stylusdevice if in range
if (CurrentStylusDevice != null && CurrentStylusDevice.InRange)
{
RawMouseInputReport cancelCaptureInputReport =
new RawMouseInputReport(mouseInputReport.Mode,
mouseInputReport.Timestamp,
mouseInputReport.InputSource,
mouseInputReport.Actions,
0, // Rest of the parameters are not used...
0,
0,
IntPtr.Zero);
InputReportEventArgs args = new InputReportEventArgs(CurrentStylusDevice, cancelCaptureInputReport);
args.RoutedEvent = InputManager.PreviewInputReportEvent;
e.Cancel();
_inputManager.Value.ProcessInput(args);
}
}
// Handle the Mouse activation
else if ((actions & RawMouseActions.Activate) != 0)
{
// If mouse is getting Activated and we ate a Deactivate then clear the cached Deactivate.
_mouseDeactivateInputReport = null;
// We process Activate events and make sure to clear any other actions if we are resending
// this from a StylusDevice. This is so we don't get a move generated before we see the
// StylusDevice InRange event and the following StylusMove which will generate a MouseMove.
StylusDevice activateStylusDevice = null;
_seenRealMouseActivate = true;
// See if we need to process this event from us.
if (CurrentStylusDevice != null && CurrentStylusDevice.InRange)
activateStylusDevice = CurrentStylusDevice;
else if (fromWisptis || ShouldConsiderStylusInRange(mouseInputReport))
activateStylusDevice = FindStylusDevice(_lastStylusDeviceId);
// We need to resend this as coming from a stylusdevice if in range possibly.
if (activateStylusDevice != null)
{
// Check to se if we have already Activated the mouse from a stylus event.
// If not then we need to let this one go through marked from us if we are in range!
if (mouseInputReport.InputSource != _inputManager.Value.PrimaryMouseDevice.CriticalActiveSource)
{
Point pt;
pt = activateStylusDevice.LastMouseScreenPoint; // Use last promoted mouse location.
pt = PointUtil.ScreenToClient(pt, mouseInputReport.InputSource);
RawMouseInputReport activateInputReport =
new RawMouseInputReport(mouseInputReport.Mode,
mouseInputReport.Timestamp,
mouseInputReport.InputSource,
RawMouseActions.Activate, // Only let activate happen.
(int)pt.X,
(int)pt.Y,
mouseInputReport.Wheel,
mouseInputReport.ExtraInformation);
InputReportEventArgs args = new InputReportEventArgs(activateStylusDevice, activateInputReport);
args.RoutedEvent = InputManager.PreviewInputReportEvent;
_inputManager.Value.ProcessInput(args);
}
// If stylus is active then eat this since we'll send the activate. We just cancel
// to ensure the mouse event from HwndMouseInputProvider returns that it was not handled.
// The mouse device code will not do anything with the event during PreProcessInput and
// it will not see a PreNotifyInput event for this.
e.Cancel();
}
}
// Handle moves and button presses that might be from wisptis or in conflict with our current state
else if ((actions & (RawMouseActions.AbsoluteMove | RawMouseActions.QueryCursor |
RawMouseActions.Button1Press | RawMouseActions.Button1Release |
RawMouseActions.Button2Press | RawMouseActions.Button2Release)) != 0)
{
// If we see a mouse left down and stylus is inRange and we haven't sent a mouse down
// then send it through.
if ((actions & RawMouseActions.Button1Press) != 0 && CurrentStylusDevice != null &&
!CurrentStylusDevice.InAir)
{
// We can only Activate the window without flashing the tray icon for it when
// we are processing an Input message. So we defer it till we see the mouse down.
HwndSource hwndSource = mouseInputReport.InputSource as HwndSource;
IntPtr hwnd = hwndSource != null ? hwndSource.CriticalHandle : IntPtr.Zero;
// If we see a stylusdown and we are not the foreground window
// and there's no capture then make sure we get activated.
// We only do this for top most windows.
if (hwnd != IntPtr.Zero &&
_inputManager.Value.PrimaryMouseDevice.Captured != null &&
UnsafeNativeMethods.GetParent(new HandleRef(this, hwnd)) == IntPtr.Zero &&
hwnd != UnsafeNativeMethods.GetForegroundWindow())
{
// Check to see if this window has the WS_EX_NOACTIVATE style set, if so don't do the activation work.
int style = UnsafeNativeMethods.GetWindowLong(new HandleRef(this,hwnd), NativeMethods.GWL_EXSTYLE);
if ((style & NativeMethods.WS_EX_NOACTIVATE) == 0)
{
UnsafeNativeMethods.SetForegroundWindow(new HandleRef(this,hwndSource.Handle));
}
}
// There are times we need to make sure we promote the left mouse down before we see a system gesture.
// This is when the press and hold gesture is disabled and thus we can guarentee that sending the
// left mouse down is the correct thing to do. This is critical for some controls such as repeat
// buttons since in order get them in the pressed state (and start them repeating) we have to send the
// left mouse down. Note if you go down with the stylus and don't move it past the drag tolerance no
// system gesture will be generated and the normal code to promote the mouse down will not happen otherwise.
//
// This code will kick in on Vista with the new support to disable the press and hold gesture per element
// (via WM_TABLE_QUERYSYSTEMGESTURESTATUS message) and also on XP and Vista if the press and hold gesture is
// disabled in the tablet control panel.
if (!CurrentStylusDevice.SentMouseDown && fromWisptis && ShouldPromoteToMouse(CurrentStylusDevice))
{
// left button down...lets replay the down at this time...
// Note: We may wait till later if stylus is not down yet!
// We will do it only when we are not manipulating and we will
// delay it if we know that manipulations are possible.
StylusTouchDevice touchDevice = CurrentStylusDevice.TouchDevice;
if (touchDevice.PromotingToManipulation)
{
touchDevice.StoredStagingAreaItems.Add(e.StagingItem);
}
else if (touchDevice.PromotingToOther)
{
CurrentStylusDevice.PlayBackCachedDownInputReport(mouseInputReport.Timestamp);
}
}
}
// We want to eat mouse messages with the wisptis injected signature except
// if the MouseDevice is getting activated or deactivated by it (filtered out
// above). We also want to eat any spurious mouse events recieved between the
// stylus down and the stylus system gesture getting fired.
if (fromWisptis)
{
// eat mouse messages generated by stylus;
// these will be handled off the stylus event stream and promoted to a mouse input event
bool handled = true;
// If the mouse is captured we need to validate that the mouse location
// is actually inside the client area (we will only see those wisptis
// events and can thus eat this one).
Point ptMouse = new Point(mouseInputReport.X, mouseInputReport.Y);
bool stylusIsDown = (CurrentStylusDevice != null) ? !CurrentStylusDevice.InAir : false;
if (!stylusIsDown && Mouse.Captured != null && !InWindowClientRect(ptMouse, mouseInputReport.InputSource))
{
handled = false;
}
// If the input has been marked as Handled, we want it to be cancelled at PreProcess stage.
if (handled)
{
// We can't mark left and right mouse buttons as handled since it will stop the
// DefWindowProc from being processed but we Cancel it which stops mouse from processing
// it. Move's though we need to eat.
if ((actions & (RawMouseActions.Button1Press | RawMouseActions.Button2Press)) == 0)
{
input.Handled = true;
}
e.Cancel();
// If the stylus is in the up state when we see a mouse down then just note that we've
// seen the mouse left down and wanted to send it but the stylus down
// has not been seen yet so we can't. When we see the stylus down later we'll promote
// the left mouse down after processing the stylus down.
if ((actions & RawMouseActions.Button1Press) != 0 && CurrentStylusDevice != null &&
CurrentStylusDevice.InAir)
{
CurrentStylusDevice.SetSawMouseButton1Down(true);
}
// Only try to process stylus events on wisptis generated mouse events and
// make sure we don't re-enter ourselves.
if (!_processingQueuedEvent)
{
// Make sure we process any pending Stylus Input before this mouse event.
InputManagerProcessInput(null);
}
}
}
else
{
bool cancelMouseEvent = false;
bool markHandled = true;
// If Stylus is in range then it will be driving the mouse. Ignore any mouse input.
if (_stylusDeviceInRange)
{
cancelMouseEvent = true;
// We can't mark left and right mouse buttons as handled since it will stop the
// DefWindowProc from being processed but we Cancel it which stops mouse from processing
// it. Move's though we need to eat.
if ((actions & (RawMouseActions.Button1Press | RawMouseActions.Button2Press)) == 0)
{
markHandled = false;
}
}
// If we see only a mouse move related action while the stylus is in range then
// eat it or try to defer it if not currently in range to see if we come into range.
else if ((actions & ~(RawMouseActions.AbsoluteMove | RawMouseActions.QueryCursor)) == 0)
{
if (DeferMouseMove(mouseInputReport))
{
cancelMouseEvent = true;
}
else
{
// If we now think we're going in range then eat this mouse event
if (_lastMouseMoveFromStylus && ShouldConsiderStylusInRange(mouseInputReport))
{
SendDeferredMouseEvent(false); // Make sure we clear any deferred mouse events now.
cancelMouseEvent = true;
}
// We're now allowing this mouse event (and deferred one) to be processed...
else
{
// It's a Synchronize that we are letting through so set stylus was not last move anymore.
_lastMouseMoveFromStylus = false;
// See if we are dealing with a second mouse event,
// if so force the original one it to be processed first.
if (!_triedDeferringMouseMove)
SendDeferredMouseEvent(true);
// CurrentStylusDevice is not in range and we're seeeing mouse messages
// that are not from wisptis, time to set IsStylusOver to null
if (CurrentStylusDevice != null)
{
// No current stylus device anymore either.
SelectStylusDevice(null, null, true);
}
}
}
}
// If we see a down and have a cached move then let them both go through
else
{
// We see a mouse button 1 or 2 down/up. If we have a cache then dump it and mark that we've
// seen mouse input.
_lastMouseMoveFromStylus = false;
SendDeferredMouseEvent(true);
// CurrentStylusDevice is not in range and we're seeeing mouse messages
// that are not from wisptis, time to set IsStylusOver to null
if (CurrentStylusDevice != null)
{
// No current stylus device anymore either.
SelectStylusDevice(null, null, true);
}
}
// See if we wanted to eat this mouse event...
if (cancelMouseEvent)
{
e.Cancel(); // abort this input
if (markHandled)
{
input.Handled = true; // We also don't want MouseDevice processing this.
}
}
}
}
// Some other real mouse only generated event came through...
else
{
// Make sure it's only the ones we know should come through.
Debug.Assert((actions & ~(RawMouseActions.Button3Press | RawMouseActions.Button3Release |
RawMouseActions.Button4Press | RawMouseActions.Button4Release |
RawMouseActions.Button5Press | RawMouseActions.Button5Release |
RawMouseActions.VerticalWheelRotate |
RawMouseActions.HorizontalWheelRotate)) == 0);
// If we are not in range then make sure we update our state.
// Otherwise we just let this event go through to the MouseDevice.
if (!_stylusDeviceInRange)
{
// We are letting this move through so set stylus was not last move anymore.
_lastMouseMoveFromStylus = false;
// Dump cache!
SendDeferredMouseEvent(true);
// CurrentStylusDevice is not in range and we're seeeing mouse messages
// that are not from wisptis, time to set IsStylusOver to null
if (CurrentStylusDevice != null)
{
// We now don't have a current stylus device.
SelectStylusDevice(null, null, true);
}
}
else
{
// Make sure to dump the cached mouse event if we are in
// range to make sure this mouse event is at the right spot!
SendDeferredMouseEvent(true);
}
}
}
else
{
_lastMouseMoveFromStylus = false;
}
}
else
{
// This event is marked as coming from a StylusDevice so make sure we update flag that we saw mouse event from stylus.
_lastMouseMoveFromStylus = true;
RawMouseInputReport rawMouseInputReport = (RawMouseInputReport) input.Report;
StylusDevice stylusDevice = (StylusDevice)input.Device;
if (!stylusDevice.InRange && rawMouseInputReport._isSynchronize)
{
// eat this one because it is from an activate.
e.Cancel();
input.Handled = true;
}
}
}
else if (input.Report.Type == InputType.Stylus)
{
RawStylusInputReport stylusInputReport = (RawStylusInputReport) input.Report;
StylusDevice stylusDevice = stylusInputReport.StylusDevice; // RTI sets this if it finds StylusDevice based on Id.
bool cancelInput = true; // Only process if we see we have valid input data.
if (stylusInputReport.InputSource != null && stylusInputReport.PenContext != null)
{
if (stylusDevice == null)
{
// look up stylus device, select it in the Stylus, and claim input for it
stylusDevice = FindStylusDevice(stylusInputReport.StylusDeviceId);
// Try refreshing tablets if we failed to find this stylus device.
if (stylusDevice == null)
{
stylusDevice = TabletDevices.UpdateStylusDevices(
stylusInputReport.TabletDeviceId,
stylusInputReport.StylusDeviceId);
}
stylusInputReport.StylusDevice = stylusDevice; // update stylusdevice.
}
_triedDeferringMouseMove = false; // reset anytime we see stylus input.
// See if this is the special InRange input report that we use to track queued inrange
// events so that we can better filter out bogus mouse input.
if (stylusInputReport.Actions == RawStylusActions.InRange && stylusInputReport.Data == null)
{
stylusInputReport.PenContext.DecrementQueuedInRangeCount();
e.Cancel();
input.Handled = true;
_lastInRangeTime = Environment.TickCount;
return;
}
// See if this is the special DoubleTap Gesture input report. We use this
// event to know when we won't get the tap or drag gesture while the stylus
// is down. This allows us to detect and generate the Drag gesture on our own.
if (stylusInputReport.Actions == RawStylusActions.SystemGesture && stylusDevice != null)
{
RawStylusSystemGestureInputReport systemGestureReport = (RawStylusSystemGestureInputReport)stylusInputReport;
if (systemGestureReport.SystemGesture == RawStylusSystemGestureInputReport.InternalSystemGestureDoubleTap)
{
stylusDevice.SeenDoubleTapGesture = true;
e.Cancel();
input.Handled = true;
return;
}
}
if (stylusDevice != null && IsValidStylusAction(stylusInputReport))
{
cancelInput = false; // We can process this event - don't cancel!
// See if a static gesture can be generated
TabletDevice tabletDevice = stylusDevice.TabletDevice;
if (tabletDevice != null)
{
SystemGesture? systemGesture = tabletDevice.GenerateStaticGesture(stylusInputReport);
if (systemGesture != null)
{
GenerateGesture(stylusInputReport, systemGesture.Value);
}
}
// See if we need to generate a tap gesture.
if (stylusInputReport.Actions == RawStylusActions.Up)
{
if (!stylusDevice.GestureWasFired)
{
GenerateGesture(stylusInputReport, stylusDevice.LastTapBarrelDown ? SystemGesture.RightTap : SystemGesture.Tap);
}
if (!_inDragDrop && !stylusInputReport.PenContext.Contexts.IsWindowDisabled)
{
// We need to process a MouseMove before promoting a MouseUp (in PromoteMainToMouse)
// since the stylus updates the button states for mouse to up then.
// Note: The Stylus Up is at the same location as the last stylus move so this is OK to do here.
ProcessMouseMove(stylusDevice, stylusInputReport.Timestamp, false);
}
}
input.Device = stylusDevice;
}
}
if (cancelInput)
{
e.Cancel(); // Don't process this bogus event any further.
}
}
}
}
}
}
private bool DeferMouseMove(RawMouseInputReport mouseInputReport)
{
if (!_triedDeferringMouseMove)
{
if (_deferredMouseMove != null)
{
return false; // only allow one at a time.
}
else
{
_deferredMouseMove = mouseInputReport;
// Now make the deferred call to the process the mouse move.
Dispatcher.BeginInvoke(DispatcherPriority.Background, _processDeferredMouseMove, null);
}
return true;
}
return false;
}
internal bool ShouldConsiderStylusInRange(RawMouseInputReport mouseInputReport)
{
int timestamp = mouseInputReport.Timestamp;
// First check to see if we are close to the last time we've had a Stylus InRange
// We consider it inrange if _lastInRangeTime+500 >= timestamp (whether we've seen
// one within last 500ms).
// Here's some info on how this works...
// int.MaxValue - int.MinValue = -1 (subtracting any negative # from MaxValue keeps this negative)
// int.MinValue - int.MaxValue = 1 (subtracting any positive # from MinValue keeps this positive)
// So as values close to MaxValue and MinValue get farther apart the result increases from a
// of delta 1 and we can thus take the Abs value to use for this check.
// Note: we don't really care if times wrap since the worst thing that would happen
// is we'd let a mouse event slip through as you brought the stylus in range which
// can happen today anyway.
if (Math.Abs(unchecked(timestamp - _lastInRangeTime)) <= 500)
return true;
HwndSource hwndSource = mouseInputReport.InputSource as HwndSource;
if (hwndSource != null)
{
PenContexts penContexts = GetPenContextsFromHwnd(hwndSource);
if (penContexts != null)
{
return penContexts.ConsiderInRange(timestamp);
}
}
return false;
}
private void ProcessMouseMove(StylusDevice stylusDevice, int timestamp, bool isSynchronize)
{
System.Diagnostics.Debug.Assert(stylusDevice != null);
if (!ShouldPromoteToMouse(stylusDevice) || !stylusDevice.TouchDevice.PromotingToOther)
{
return;
}
PresentationSource mouseInputSource = stylusDevice.GetMousePresentationSource();
if (mouseInputSource != null)
{
RawMouseActions actions = RawMouseActions.AbsoluteMove;
// Don't set Activate flag if a synchronize is requested!
if (!isSynchronize)
{
if (_inputManager.Value.PrimaryMouseDevice.CriticalActiveSource != mouseInputSource)
{
actions |= RawMouseActions.Activate;
}
}
Point pt = stylusDevice.LastMouseScreenPoint; // Use last promoted mouse location.
pt = PointUtil.ScreenToClient(pt, mouseInputSource);
RawMouseInputReport mouseInputReport =
new RawMouseInputReport(InputMode.Foreground,
timestamp,
mouseInputSource,
actions,
(int)pt.X,
(int)pt.Y,
0,
IntPtr.Zero);
if (isSynchronize)
{
mouseInputReport._isSynchronize = true;
}
_lastRawMouseAction = actions;
InputReportEventArgs inputReportArgs = new InputReportEventArgs(stylusDevice, mouseInputReport);
inputReportArgs.RoutedEvent = InputManager.PreviewInputReportEvent;
// Process this directly instead of doing a push. We want this event to get
// to the user before the StylusUp and MouseUp event.
InputManagerProcessInputEventArgs(inputReportArgs);
}
}
private void PromoteMainToMouse(StagingAreaInputItem stagingItem)
{
if(!stagingItem.Input.Handled)
{
StylusEventArgs stylusArgs = stagingItem.Input as StylusEventArgs;
if (stylusArgs != null)
{
StylusDevice stylusDevice = stylusArgs.StylusDevice;
// We only want to promote to mouse when we actually have real stylus input.
if (stylusDevice != null)
{
Debug.Assert(ShouldPromoteToMouse(stylusDevice) && stylusDevice.TouchDevice.PromotingToOther);
if (IgnoreGestureToMousePromotion(stylusArgs as StylusSystemGestureEventArgs, stylusDevice.TouchDevice))
{
return;
}
RawMouseActions actions = stylusDevice.GetMouseActionsFromStylusEventAndPlaybackCachedDown(stagingItem.Input.RoutedEvent, stylusArgs);
if (actions != RawMouseActions.None)
{
PresentationSource mouseInputSource = stylusDevice.GetMousePresentationSource();
if (mouseInputSource != null)
{
Point pt = PointUtil.ScreenToClient(stylusDevice.LastMouseScreenPoint, mouseInputSource);
//
// use the dispatcher as a way of coalescing mouse *move* messages
// BUT don't flood the dispatcher with delegates if we're already
// waiting for a callback
//
if ((actions & RawMouseActions.AbsoluteMove) != 0)
{
if (actions == _lastRawMouseAction && _waitingForDelegate)
{
return; // We don't need to process this one.
}
else
{
//set the waiting bit so we won't enter here again
//until we get the callback
_waitingForDelegate = true;
Dispatcher.BeginInvoke(DispatcherPriority.Input,
(DispatcherOperationCallback)delegate(object unused)
{
//reset our flags here in the callback.
_waitingForDelegate = false;
return null;
},
null);
}
}
// See if we need to set the Mouse Activate flag.
if (_inputManager.Value.PrimaryMouseDevice.CriticalActiveSource != mouseInputSource)
{
actions |= RawMouseActions.Activate;
}
_lastRawMouseAction = actions;
RawMouseInputReport mouseInputReport = new RawMouseInputReport(
InputMode.Foreground, stylusArgs.Timestamp, mouseInputSource,
actions, (int)pt.X, (int)pt.Y, 0, IntPtr.Zero);
InputReportEventArgs inputReportArgs = new InputReportEventArgs(stylusDevice, mouseInputReport);
inputReportArgs.RoutedEvent=InputManager.PreviewInputReportEvent;
_inputManager.Value.ProcessInput(inputReportArgs);
}
}
}
}
}
}
