public void Event_Should_Be_Routed_To_Device_Target()
{
InputElement element = new InputElement();
TestEventArgs e = new TestEventArgs(element);
e.RoutedEvent = InputElement.RawEvent;
InputManager.Current.ProcessInput(e);
Assert.IsTrue(element.RawEventRaised);
}
public void Event_Should_Not_Be_Routed_If_Cancelled()
{
PreProcessInputEventHandler preProcess = (sender, ev) =>
{
ev.Cancel();
};
InputElement element = new InputElement();
TestEventArgs e = new TestEventArgs(element);
e.RoutedEvent = InputElement.RawEvent;
InputManager.Current.PreProcessInput += preProcess;
InputManager.Current.ProcessInput(e);
InputManager.Current.PreProcessInput -= preProcess;
Assert.IsFalse(element.RawEventRaised);
}
public void PreNotifyInput_Should_Be_Called()
{
bool notified = false;
NotifyInputEventHandler preNotify = (sender, ev) =>
{
notified = true;
};
InputElement element = new InputElement();
TestEventArgs e = new TestEventArgs(element);
e.RoutedEvent = InputElement.RawEvent;
InputManager.Current.PreNotifyInput += preNotify;
InputManager.Current.ProcessInput(e);
InputManager.Current.PreNotifyInput -= preNotify;
Assert.IsTrue(notified);
}
private void ChangeFocus(DependencyObject focus, int timestamp)
{
DependencyObject o = null;
if (focus != _focus)
{
// Update the critical pieces of data.
DependencyObject oldFocus = _focus;
_focus = focus;
_focusRootVisual = InputElement.GetRootVisual(focus);
using (Dispatcher.DisableProcessing()) // Disable reentrancy due to locks taken
{
// Adjust the handlers we use to track everything.
if (oldFocus != null)
{
o = oldFocus;
if (InputElement.IsUIElement(o))
{
((UIElement)o).IsEnabledChanged -= _isEnabledChangedEventHandler;
((UIElement)o).IsVisibleChanged -= _isVisibleChangedEventHandler;
((UIElement)o).FocusableChanged -= _focusableChangedEventHandler;
}
else if (InputElement.IsContentElement(o))
{
((ContentElement)o).IsEnabledChanged -= _isEnabledChangedEventHandler;
// NOTE: there is no IsVisible property for ContentElements.
((ContentElement)o).FocusableChanged -= _focusableChangedEventHandler;
}
else
{
((UIElement3D)o).IsEnabledChanged -= _isEnabledChangedEventHandler;
((UIElement3D)o).IsVisibleChanged -= _isVisibleChangedEventHandler;
((UIElement3D)o).FocusableChanged -= _focusableChangedEventHandler;
}
}
if (_focus != null)
{
o = _focus;
if (InputElement.IsUIElement(o))
{
((UIElement)o).IsEnabledChanged += _isEnabledChangedEventHandler;
((UIElement)o).IsVisibleChanged += _isVisibleChangedEventHandler;
((UIElement)o).FocusableChanged += _focusableChangedEventHandler;
}
else if (InputElement.IsContentElement(o))
{
((ContentElement)o).IsEnabledChanged += _isEnabledChangedEventHandler;
// NOTE: there is no IsVisible property for ContentElements.
((ContentElement)o).FocusableChanged += _focusableChangedEventHandler;
}
else
{
((UIElement3D)o).IsEnabledChanged += _isEnabledChangedEventHandler;
((UIElement3D)o).IsVisibleChanged += _isVisibleChangedEventHandler;
((UIElement3D)o).FocusableChanged += _focusableChangedEventHandler;
}
}
}
// Oddly enough, update the FocusWithinProperty properties first. This is
// so any callbacks will see the more-common FocusWithinProperty properties
// set correctly.
UIElement.FocusWithinProperty.OnOriginValueChanged(oldFocus, _focus, ref _focusTreeState);
// Invalidate the IsKeyboardFocused properties.
if (oldFocus != null)
{
o = oldFocus;
o.SetValue(UIElement.IsKeyboardFocusedPropertyKey, false); // Same property for ContentElements
}
if (_focus != null)
{
// Invalidate the IsKeyboardFocused property.
o = _focus;
o.SetValue(UIElement.IsKeyboardFocusedPropertyKey, true); // Same property for ContentElements
}
// Call TestServicesManager change the focus of the InputMethod is enable/disabled accordingly
// so it's ready befere the GotKeyboardFocusEvent handler is invoked.
if (_TsfManager != null)
{
_TsfManager.Value.Focus(_focus);
}
// InputLanguageManager checks the preferred input languages.
// This should before GotEvent because the preferred input language
// should be set at the event handler.
InputLanguageManager.Current.Focus(_focus, oldFocus);
// Send the LostKeyboardFocus and GotKeyboardFocus events.
if (oldFocus != null)
{
KeyboardFocusChangedEventArgs lostFocus = new KeyboardFocusChangedEventArgs(this, timestamp, (IInputElement)oldFocus, (IInputElement)focus);
lostFocus.RoutedEvent = Keyboard.LostKeyboardFocusEvent;
lostFocus.Source = oldFocus;
if (_inputManager != null)
{
_inputManager.Value.ProcessInput(lostFocus);
}
}
if (_focus != null)
{
KeyboardFocusChangedEventArgs gotFocus = new KeyboardFocusChangedEventArgs(this, timestamp, (IInputElement)oldFocus, (IInputElement)_focus);
gotFocus.RoutedEvent = Keyboard.GotKeyboardFocusEvent;
gotFocus.Source = _focus;
if (_inputManager != null)
{
_inputManager.Value.ProcessInput(gotFocus);
}
}
// InputMethod checks the preferred ime state.
// The preferred input methods should be applied after Cicero TIP gots SetFocus callback.
InputMethod.Current.GotKeyboardFocus(_focus);
//Could be also built-in into IsKeyboardFocused_Changed static on UIElement and ContentElement
//However the Automation likes to go immediately back on us so it would be better be last one...
AutomationPeer.RaiseFocusChangedEventHelper((IInputElement)_focus);
}
}
public void ProcessInput_Should_Return_True_If_One_Event_Handled()
{
PreProcessInputEventHandler preProcess = (sender, ev) =>
{
if (ev.StagingItem.Input.RoutedEvent == InputElement.RawEvent)
{
TestEventArgs mutated = new TestEventArgs(ev.StagingItem.Input.Device.Target);
mutated.RoutedEvent = InputElement.MutatedEvent;
StagingAreaInputItem stagingItem = CreateStagingItem(mutated);
ev.PushInput(stagingItem);
}
};
InputElement element = new InputElement();
element.SetMutatedEventHandled = true;
TestEventArgs e = new TestEventArgs(element);
e.RoutedEvent = InputElement.RawEvent;
InputManager.Current.PreProcessInput += preProcess;
bool result = InputManager.Current.ProcessInput(e);
InputManager.Current.PreProcessInput -= preProcess;
// This goes against the documentation which says should return true if all events handled.
Assert.IsTrue(element.RawEventRaised);
Assert.IsTrue(element.MutatedEventRaised);
Assert.IsTrue(result);
}
public void Mutated_Event_Should_Be_Raised_With_Nested_ProcessInput()
{
bool calledWithMutated = false;
PreProcessInputEventHandler preProcess = (sender, ev) =>
{
if (ev.StagingItem.Input.RoutedEvent == InputElement.RawEvent)
{
TestEventArgs mutated = new TestEventArgs(ev.StagingItem.Input.Device.Target);
mutated.RoutedEvent = InputElement.MutatedEvent;
InputManager.Current.ProcessInput(mutated);
}
else if (ev.StagingItem.Input.RoutedEvent == InputElement.MutatedEvent)
{
calledWithMutated = true;
}
};
InputElement element = new InputElement();
TestEventArgs e = new TestEventArgs(element);
e.RoutedEvent = InputElement.RawEvent;
InputManager.Current.PreProcessInput += preProcess;
InputManager.Current.ProcessInput(e);
InputManager.Current.PreProcessInput -= preProcess;
Assert.IsTrue(element.RawEventRaised);
Assert.IsTrue(element.MutatedEventRaised);
Assert.IsTrue(calledWithMutated);
}
public void PostProcess_Event_Should_Be_Called_With_Mutated_Event()
{
bool calledWithMutated = false;
PreProcessInputEventHandler preProcess = (sender, ev) =>
{
if (ev.StagingItem.Input.RoutedEvent == InputElement.RawEvent)
{
TestEventArgs mutated = new TestEventArgs(ev.StagingItem.Input.Device.Target);
mutated.RoutedEvent = InputElement.MutatedEvent;
StagingAreaInputItem stagingItem = CreateStagingItem(mutated);
ev.PushInput(stagingItem);
ev.Cancel();
}
};
ProcessInputEventHandler postProcess = (sender, ev) =>
{
if (ev.StagingItem.Input.RoutedEvent == InputElement.MutatedEvent)
{
calledWithMutated = true;
}
};
InputElement element = new InputElement();
TestEventArgs e = new TestEventArgs(element);
e.RoutedEvent = InputElement.RawEvent;
InputManager.Current.PreProcessInput += preProcess;
InputManager.Current.PostProcessInput += postProcess;
InputManager.Current.ProcessInput(e);
InputManager.Current.PostProcessInput += postProcess;
InputManager.Current.PreProcessInput -= preProcess;
Assert.IsTrue(calledWithMutated);
}
public void ProcessInput_Should_Return_False_If_No_Events_Handled()
{
PreProcessInputEventHandler preProcess = (sender, ev) =>
{
if (ev.StagingItem.Input.RoutedEvent == InputElement.RawEvent)
{
TestEventArgs mutated = new TestEventArgs(ev.StagingItem.Input.Device.Target);
mutated.RoutedEvent = InputElement.MutatedEvent;
StagingAreaInputItem stagingItem = CreateStagingItem(mutated);
ev.PushInput(stagingItem);
}
};
InputElement element = new InputElement();
TestEventArgs e = new TestEventArgs(element);
e.RoutedEvent = InputElement.RawEvent;
InputManager.Current.PreProcessInput += preProcess;
bool result = InputManager.Current.ProcessInput(e);
InputManager.Current.PreProcessInput -= preProcess;
Assert.IsFalse(result);
}
public void Mutated_Event_Should_Still_Be_Raised_When_Raw_Event_Cancelled()
{
PreProcessInputEventHandler preProcess = (sender, ev) =>
{
if (ev.StagingItem.Input.RoutedEvent == InputElement.RawEvent)
{
TestEventArgs mutated = new TestEventArgs(ev.StagingItem.Input.Device.Target);
mutated.RoutedEvent = InputElement.MutatedEvent;
StagingAreaInputItem stagingItem = CreateStagingItem(mutated);
ev.PushInput(stagingItem);
ev.Cancel();
}
};
InputElement element = new InputElement();
TestEventArgs e = new TestEventArgs(element);
e.RoutedEvent = InputElement.RawEvent;
InputManager.Current.PreProcessInput += preProcess;
InputManager.Current.ProcessInput(e);
InputManager.Current.PreProcessInput -= preProcess;
Assert.IsFalse(element.RawEventRaised);
Assert.IsTrue(element.MutatedEventRaised);
}
/// <summary>
/// Retrieves the history of intermediate Points up to 64 previous coordinates of the mouse or pen.
/// </summary>
/// <param name="relativeTo">
/// The element relative which the points need to be returned.
/// </param>
/// <param name="points">
/// Points relative to the first parameter are returned.
/// </param>
public static int GetIntermediatePoints(IInputElement relativeTo, Point[] points)
{
// Security Mitigation: do not give out input state if the device is not active.
if (Mouse.PrimaryDevice.IsActive)
{
if (relativeTo != null)
{
PresentationSource inputSource = PresentationSource.FromDependencyObject(InputElement.GetContainingVisual(relativeTo as DependencyObject));
if (inputSource != null)
{
IMouseInputProvider mouseInputProvider = inputSource.GetInputProvider(typeof(MouseDevice)) as IMouseInputProvider;
if (null != mouseInputProvider)
{
return(mouseInputProvider.GetIntermediatePoints(relativeTo, points));
}
}
}
}
return(-1);
}
/// <summary>
/// Determines if we can remain focused on the element we think has focus
/// </summary>
/// <remarks>
/// Invoked asynchronously by ReevaluateFocusAsync.
/// Confirms that the element we think has focus is:
/// - still enabled
/// - still visible
/// - still in the tree
/// </remarks>
private object ReevaluateFocusCallback(object arg)
{
_reevaluateFocusOperation = null;
if (_focus == null)
{
return(null);
}
//
// Reevaluate the eligability of the focused element to actually
// have focus. If that element is no longer focusable, then search
// for an ancestor that is.
//
DependencyObject element = _focus;
while (element != null)
{
if (Keyboard.IsFocusable(element))
{
break;
}
// Walk the current tree structure.
element = DeferredElementTreeState.GetCoreParent(element, null);
}
// Get the PresentationSource that contains the element to be focused.
PresentationSource presentationSource = null;
DependencyObject visualContainer = InputElement.GetContainingVisual(element);
if (visualContainer != null)
{
presentationSource = PresentationSource.CriticalFromVisual(visualContainer);
}
// The default action is to reset focus to the root element
// of the active presentation source.
bool moveFocus = true;
DependencyObject moveFocusTo = null;
if (presentationSource != null)
{
IKeyboardInputProvider keyboardProvider = presentationSource.GetInputProvider(typeof(KeyboardDevice)) as IKeyboardInputProvider;
if (keyboardProvider != null)
{
// Confirm with the keyboard provider for this
// presentation source that it has acquired focus.
if (keyboardProvider.AcquireFocus(true))
{
if (element == _focus)
{
// The focus element is still good.
moveFocus = false;
}
else
{
// The focus element is no longer focusable, but we found
// an ancestor that is, so move focus there.
moveFocus = true;
moveFocusTo = element;
}
}
}
}
if (moveFocus)
{
if (moveFocusTo == null && _activeSource != null)
{
moveFocusTo = _activeSource.Value.RootVisual as DependencyObject;
}
Focus(moveFocusTo, /*askOld=*/ false, /*askNew=*/ true, /*forceToNullIfFailed=*/ true);
}
else
{
// Refresh FocusWithinProperty so that ReverseInherited Flags are updated.
//
// We only need to do this if there is any information about the old
// tree structure.
if (_focusTreeState != null && !_focusTreeState.IsEmpty)
{
UIElement.FocusWithinProperty.OnOriginValueChanged(_focus, _focus, ref _focusTreeState);
}
}
return(null);
}
public void PostProcessInput_Should_Not_Be_Called_If_Cancelled()
{
bool notified = false;
PreProcessInputEventHandler preProcess = (sender, ev) =>
{
ev.Cancel();
};
ProcessInputEventHandler postProcess = (sender, ev) =>
{
notified = true;
};
InputElement element = new InputElement();
TestEventArgs e = new TestEventArgs(element);
e.RoutedEvent = InputElement.RawEvent;
InputManager.Current.PreProcessInput += preProcess;
InputManager.Current.PostProcessInput += postProcess;
InputManager.Current.ProcessInput(e);
InputManager.Current.PostProcessInput += postProcess;
InputManager.Current.PreProcessInput -= preProcess;
Assert.IsFalse(notified);
}
private bool ProcessStagingArea()
{
bool handled = false;
// For performance reasons, try to reuse the input event args.
// If we are reentrered, we have to start over with fresh event
// args, so we clear the member variables before continuing.
// Also, we cannot simply make an single instance of the
// PreProcessedInputEventArgs and cast it to NotifyInputEventArgs
// or ProcessInputEventArgs because a malicious user could upcast
// the object and call inappropriate methods.
NotifyInputEventArgs notifyInputEventArgs = (_notifyInputEventArgs != null) ? _notifyInputEventArgs : new NotifyInputEventArgs();
ProcessInputEventArgs processInputEventArgs = (_processInputEventArgs != null) ? _processInputEventArgs : new ProcessInputEventArgs();
PreProcessInputEventArgs preProcessInputEventArgs = (_preProcessInputEventArgs != null) ? _preProcessInputEventArgs : new PreProcessInputEventArgs();
_notifyInputEventArgs = null;
_processInputEventArgs = null;
_preProcessInputEventArgs = null;
// Because we can be reentered, we can't just enumerate over the
// staging area - that could throw an exception if the queue
// changes underneath us. Instead, just loop until we find a
// frame marker or until the staging area is empty.
StagingAreaInputItem item = null;
while ((item = PopInput()) != null)
{
// If we found a marker, we have reached the end of a
// "section" of the staging area. We just return from
// the synchronous processing of the staging area.
// If a dispatcher frame has been pushed by someone, this
// will not return to the original ProcessInput. Instead
// it will unwind to the dispatcher and since we have
// already pushed a work item to continue processing the
// input, it will simply call back into us to do more
// processing. At which point we will continue to drain
// the staging area. This could cause strage behavior,
// but it is deemed more acceptable than stalling input
// processing.
//
if (item.IsMarker)
{
break;
}
// Pre-Process the input. This could modify the staging
// area, and it could cancel the processing of this
// input event.
//
// Because we use multi-cast delegates, we always have to
// create a new multi-cast delegate when we add or remove
// a handler. This means we can just call the current
// multi-cast delegate instance, and it is safe to iterate
// over, even if we get reentered.
if (_preProcessInput != null)
{
preProcessInputEventArgs.Reset(item, this);
// Invoke the handlers in reverse order so that handlers that
// users add are invoked before handlers in the system.
Delegate[] handlers = _preProcessInput.GetInvocationList();
for (int i = (handlers.Length - 1); i >= 0; i--)
{
PreProcessInputEventHandler handler = (PreProcessInputEventHandler)handlers[i];
handler(this, preProcessInputEventArgs);
}
}
if (!preProcessInputEventArgs.Canceled)
{
// Pre-Notify the input.
//
// Because we use multi-cast delegates, we always have to
// create a new multi-cast delegate when we add or remove
// a handler. This means we can just call the current
// multi-cast delegate instance, and it is safe to iterate
// over, even if we get reentered.
if (_preNotifyInput != null)
{
notifyInputEventArgs.Reset(item, this);
// Invoke the handlers in reverse order so that handlers that
// users add are invoked before handlers in the system.
Delegate[] handlers = _preNotifyInput.GetInvocationList();
for (int i = (handlers.Length - 1); i >= 0; i--)
{
NotifyInputEventHandler handler = (NotifyInputEventHandler)handlers[i];
handler(this, notifyInputEventArgs);
}
}
// Raise the input event being processed.
InputEventArgs input = item.Input;
// Some input events are explicitly associated with
// an element. Those that are not are associated with
// the target of the input device for this event.
DependencyObject eventSource = input.Source as DependencyObject;
if (eventSource == null || !InputElement.IsValid(eventSource as IInputElement))
{
if (input.Device != null)
{
eventSource = input.Device.Target as DependencyObject;
}
}
// During synchronized input processing, event should be discarded if not listening for this input type.
if (_isSynchronizedInput &&
SynchronizedInputHelper.IsMappedEvent(input) &&
Array.IndexOf(SynchronizedInputEvents, input.RoutedEvent) < 0 &&
Array.IndexOf(PairedSynchronizedInputEvents, input.RoutedEvent) < 0)
{
if (!SynchronizedInputHelper.ShouldContinueListening(input))
{
// Discard the event
_synchronizedInputState = SynchronizedInputStates.Discarded;
SynchronizedInputHelper.RaiseAutomationEvents();
CancelSynchronizedInput();
}
else
{
_synchronizedInputAsyncClearOperation = Dispatcher.BeginInvoke((Action) delegate
{
// Discard the event
_synchronizedInputState = SynchronizedInputStates.Discarded;
SynchronizedInputHelper.RaiseAutomationEvents();
CancelSynchronizedInput();
},
DispatcherPriority.Background);
}
}
else
{
if (eventSource != null)
{
if (InputElement.IsUIElement(eventSource))
{
UIElement e = (UIElement)eventSource;
e.RaiseEvent(input, true); // Call the "trusted" flavor of RaiseEvent.
}
else if (InputElement.IsContentElement(eventSource))
{
ContentElement ce = (ContentElement)eventSource;
ce.RaiseEvent(input, true);// Call the "trusted" flavor of RaiseEvent.
}
else if (InputElement.IsUIElement3D(eventSource))
{
UIElement3D e3D = (UIElement3D)eventSource;
e3D.RaiseEvent(input, true); // Call the "trusted" flavor of RaiseEvent
}
// If synchronized input raise appropriate automation event.
if (_isSynchronizedInput && SynchronizedInputHelper.IsListening(_listeningElement, input))
{
if (!SynchronizedInputHelper.ShouldContinueListening(input))
{
SynchronizedInputHelper.RaiseAutomationEvents();
CancelSynchronizedInput();
}
else
{
_synchronizedInputAsyncClearOperation = Dispatcher.BeginInvoke((Action) delegate
{
SynchronizedInputHelper.RaiseAutomationEvents();
CancelSynchronizedInput();
},
DispatcherPriority.Background);
}
}
}
}
// Post-Notify the input.
//
// Because we use multi-cast delegates, we always have to
// create a new multi-cast delegate when we add or remove
// a handler. This means we can just call the current
// multi-cast delegate instance, and it is safe to iterate
// over, even if we get reentered.
if (_postNotifyInput != null)
{
notifyInputEventArgs.Reset(item, this);
// Invoke the handlers in reverse order so that handlers that
// users add are invoked before handlers in the system.
Delegate[] handlers = _postNotifyInput.GetInvocationList();
for (int i = (handlers.Length - 1); i >= 0; i--)
{
NotifyInputEventHandler handler = (NotifyInputEventHandler)handlers[i];
handler(this, notifyInputEventArgs);
}
}
// Post-Process the input. This could modify the staging
// area.
//
// Because we use multi-cast delegates, we always have to
// create a new multi-cast delegate when we add or remove
// a handler. This means we can just call the current
// multi-cast delegate instance, and it is safe to iterate
// over, even if we get reentered.
if (_postProcessInput != null)
{
processInputEventArgs.Reset(item, this);
RaiseProcessInputEventHandlers(_postProcessInput, processInputEventArgs);
// PreviewInputReport --> InputReport
if (item.Input.RoutedEvent == InputManager.PreviewInputReportEvent)
{
if (!item.Input.Handled)
{
InputReportEventArgs previewInputReport = (InputReportEventArgs)item.Input;
InputReportEventArgs inputReport = new InputReportEventArgs(previewInputReport.Device, previewInputReport.Report);
inputReport.RoutedEvent = InputManager.InputReportEvent;
PushInput(inputReport, item);
}
}
}
if (input.Handled)
{
handled = true;
}
}
}
// Store our input event args so that we can use them again, and
// avoid having to allocate more.
_notifyInputEventArgs = notifyInputEventArgs;
_processInputEventArgs = processInputEventArgs;
_preProcessInputEventArgs = preProcessInputEventArgs;
// Make sure to throw away the contents of the event args so
// we don't keep refs around to things we don't mean to.
_notifyInputEventArgs.Reset(null, null);
_processInputEventArgs.Reset(null, null);
_preProcessInputEventArgs.Reset(null, null);
return(handled);
}
private IInputElement CriticalHitTest(Point point, bool isSynchronize)
{
IInputElement over = null;
if (_activeSource != null)
{
switch (_captureMode)
{
case CaptureMode.None:
// No capture, do a regular hit-test.
if (_isDown)
{
if (isSynchronize)
{
// In a synchronize call, we need to hit-test the window in addition to the element
over = GlobalHitTest(point, _activeSource);
}
else
{
// Just hit-test the element
over = LocalHitTest(point, _activeSource);
}
EnsureValid(ref over);
}
break;
case CaptureMode.Element:
// Capture is to a specific element, so the device will always be over that element.
over = _captured;
break;
case CaptureMode.SubTree:
// Capture is set to an entire subtree. Hit-test to determine the element (and window)
// the device is over. If the element is within the captured sub-tree (which can span
// multiple windows), then the device is over that element. If the element is not within
// the sub-tree, then the device is over the captured element.
{
IInputElement capture = InputElement.GetContainingInputElement(_captured as DependencyObject);
if (capture != null)
{
// We need to re-hit-test to get the "real" UIElement we are over.
// This allows us to have our capture-to-subtree span multiple windows.
// GlobalHitTest always returns an IInputElement, so we are sure to have one.
over = GlobalHitTest(point, _activeSource);
}
EnsureValid(ref over);
// Make sure that the element we hit is acutally underneath
// our captured element. Because we did a global hit test, we
// could have hit an element in a completely different window.
//
// Note that we support the child being in a completely different window.
// So we use the GetUIParent method instead of just looking at
// visual/content parents.
if (over != null)
{
IInputElement ieTest = over;
while ((ieTest != null) && (ieTest != _captured))
{
UIElement eTest = ieTest as UIElement;
if (eTest != null)
{
ieTest = InputElement.GetContainingInputElement(eTest.GetUIParent(true));
}
else
{
ContentElement ceTest = ieTest as ContentElement;
if (ceTest != null)
{
ieTest = InputElement.GetContainingInputElement(ceTest.GetUIParent(true));
}
else
{
UIElement3D e3DTest = (UIElement3D)ieTest;
ieTest = InputElement.GetContainingInputElement(e3DTest.GetUIParent(true));
}
}
}
if (ieTest != _captured)
{
// If we missed the capture point, consider the device over the capture point.
over = _captured;
}
}
else
{
// If we didn't hit anything, consider the device over the capture point.
over = _captured;
}
}
break;
}
}
return(over);
}
private static void FindCommandBinding(object sender, RoutedEventArgs e, ICommand command, bool execute)
{
// Check local command bindings
CommandBindingCollection commandBindings = null;
DependencyObject senderAsDO = sender as DependencyObject;
if (InputElement.IsUIElement(senderAsDO))
{
commandBindings = ((UIElement)senderAsDO).CommandBindingsInternal;
}
else if (InputElement.IsContentElement(senderAsDO))
{
commandBindings = ((ContentElement)senderAsDO).CommandBindingsInternal;
}
else if (InputElement.IsUIElement3D(senderAsDO))
{
commandBindings = ((UIElement3D)senderAsDO).CommandBindingsInternal;
}
if (commandBindings != null)
{
FindCommandBinding(commandBindings, sender, e, command, execute);
}
// If no command binding is found, check class command bindings
// First find the relevant command bindings, under the lock.
// Most of the time there are no such bindings; most of the rest of
// the time there is only one. Lazy-allocate with this in mind.
Tuple <Type, CommandBinding> tuple = null; // zero or one binding
List <Tuple <Type, CommandBinding> > list = null; // more than one
lock (_classCommandBindings.SyncRoot)
{
// Check from the current type to all the base types
Type classType = sender.GetType();
while (classType != null)
{
CommandBindingCollection classCommandBindings = _classCommandBindings[classType] as CommandBindingCollection;
if (classCommandBindings != null)
{
int index = 0;
while (true)
{
CommandBinding commandBinding = classCommandBindings.FindMatch(command, ref index);
if (commandBinding != null)
{
if (tuple == null)
{
tuple = new Tuple <Type, CommandBinding>(classType, commandBinding);
}
else
{
if (list == null)
{
list = new List <Tuple <Type, CommandBinding> >();
list.Add(tuple);
}
list.Add(new Tuple <Type, CommandBinding>(classType, commandBinding));
}
}
else
{
break;
}
}
}
classType = classType.BaseType;
}
}
// execute the bindings. This can call into user code, so it must
// be done outside the lock to avoid deadlock.
if (list != null)
{
// more than one binding
ExecutedRoutedEventArgs exArgs = execute ? (ExecutedRoutedEventArgs)e : null;
CanExecuteRoutedEventArgs canExArgs = execute ? null : (CanExecuteRoutedEventArgs)e;
for (int i = 0; i < list.Count; ++i)
{
// invoke the binding
if ((execute && ExecuteCommandBinding(sender, exArgs, list[i].Item2)) ||
(!execute && CanExecuteCommandBinding(sender, canExArgs, list[i].Item2)))
{
// if it succeeds, advance past the remaining bindings for this type
Type classType = list[i].Item1;
while (++i < list.Count && list[i].Item1 == classType)
{
// no body needed
}
--i; // back up, so that the outer for-loop advances to the right place
}
}
}
else if (tuple != null)
{
// only one binding
if (execute)
{
ExecuteCommandBinding(sender, (ExecutedRoutedEventArgs)e, tuple.Item2);
}
else
{
CanExecuteCommandBinding(sender, (CanExecuteRoutedEventArgs)e, tuple.Item2);
}
}
}
/// <summary>
/// Scans input and command bindings for matching gestures and executes the appropriate command
/// </summary>
/// <remarks>
/// Scans for command to execute in the following order:
/// - input bindings associated with the targetElement instance
/// - input bindings associated with the targetElement class
/// - command bindings associated with the targetElement instance
/// - command bindings associated with the targetElement class
/// </remarks>
/// <param name="targetElement">UIElement/ContentElement to be scanned for input and command bindings</param>
/// <param name="inputEventArgs">InputEventArgs to be matched against for gestures</param>
internal static void TranslateInput(IInputElement targetElement, InputEventArgs inputEventArgs)
{
if ((targetElement == null) || (inputEventArgs == null))
{
return;
}
ICommand command = null;
IInputElement target = null;
object parameter = null;
// Determine UIElement/ContentElement/Neither type
DependencyObject targetElementAsDO = targetElement as DependencyObject;
bool isUIElement = InputElement.IsUIElement(targetElementAsDO);
bool isContentElement = !isUIElement && InputElement.IsContentElement(targetElementAsDO);
bool isUIElement3D = !isUIElement && !isContentElement && InputElement.IsUIElement3D(targetElementAsDO);
// Step 1: Check local input bindings
InputBindingCollection localInputBindings = null;
if (isUIElement)
{
localInputBindings = ((UIElement)targetElement).InputBindingsInternal;
}
else if (isContentElement)
{
localInputBindings = ((ContentElement)targetElement).InputBindingsInternal;
}
else if (isUIElement3D)
{
localInputBindings = ((UIElement3D)targetElement).InputBindingsInternal;
}
if (localInputBindings != null)
{
InputBinding inputBinding = localInputBindings.FindMatch(targetElement, inputEventArgs);
if (inputBinding != null)
{
command = inputBinding.Command;
target = inputBinding.CommandTarget;
parameter = inputBinding.CommandParameter;
}
}
// Step 2: If no command, check class input bindings
if (command == null)
{
lock (_classInputBindings.SyncRoot)
{
Type classType = targetElement.GetType();
while (classType != null)
{
InputBindingCollection classInputBindings = _classInputBindings[classType] as InputBindingCollection;
if (classInputBindings != null)
{
InputBinding inputBinding = classInputBindings.FindMatch(targetElement, inputEventArgs);
if (inputBinding != null)
{
command = inputBinding.Command;
target = inputBinding.CommandTarget;
parameter = inputBinding.CommandParameter;
break;
}
}
classType = classType.BaseType;
}
}
}
// Step 3: If no command, check local command bindings
if (command == null)
{
// Check for the instance level ones Next
CommandBindingCollection localCommandBindings = null;
if (isUIElement)
{
localCommandBindings = ((UIElement)targetElement).CommandBindingsInternal;
}
else if (isContentElement)
{
localCommandBindings = ((ContentElement)targetElement).CommandBindingsInternal;
}
else if (isUIElement3D)
{
localCommandBindings = ((UIElement3D)targetElement).CommandBindingsInternal;
}
if (localCommandBindings != null)
{
command = localCommandBindings.FindMatch(targetElement, inputEventArgs);
}
}
// Step 4: If no command, look at class command bindings
if (command == null)
{
lock (_classCommandBindings.SyncRoot)
{
Type classType = targetElement.GetType();
while (classType != null)
{
CommandBindingCollection classCommandBindings = _classCommandBindings[classType] as CommandBindingCollection;
if (classCommandBindings != null)
{
command = classCommandBindings.FindMatch(targetElement, inputEventArgs);
if (command != null)
{
break;
}
}
classType = classType.BaseType;
}
}
}
// Step 5: If found a command, then execute it (unless it is
// the special "NotACommand" command, which we simply ignore without
// setting Handled=true, so that the input bubbles up to the parent)
if (command != null && command != ApplicationCommands.NotACommand)
{
// We currently do not support declaring the element with focus as the target
// element by setting target == null. Instead, we interpret a null target to indicate
// the element that we are routing the event through, e.g. the targetElement parameter.
if (target == null)
{
target = targetElement;
}
bool continueRouting = false;
RoutedCommand routedCommand = command as RoutedCommand;
if (routedCommand != null)
{
if (routedCommand.CriticalCanExecute(parameter,
target,
inputEventArgs.UserInitiated /*trusted*/,
out continueRouting))
{
// If the command can be executed, we never continue to route the
// input event.
continueRouting = false;
ExecuteCommand(routedCommand, parameter, target, inputEventArgs);
}
}
else
{
if (command.CanExecute(parameter))
{
command.Execute(parameter);
}
}
// If we mapped an input event to a command, we should always
// handle the input event - regardless of whether the command
// was executed or not. Unless the CanExecute handler told us
// to continue the route.
inputEventArgs.Handled = !continueRouting;
}
}
internal static Point TranslatePoint(Point pt, DependencyObject from, DependencyObject to, out bool translated)
{
translated = false;
Point ptTranslated = pt;
// Get the containing and root visuals we are coming from.
DependencyObject vFromAsDO = InputElement.GetContainingVisual(from);
Visual rootFrom = InputElement.GetRootVisual(from) as Visual;
Visual vFrom = vFromAsDO as Visual;
if (vFromAsDO != null && vFrom == null)
{
// must be a Visual3D - get it's 2D visual parent
vFrom = VisualTreeHelper.GetContainingVisual2D(vFromAsDO);
}
if (vFrom != null && rootFrom != null)
{
GeneralTransform gUp;
Matrix mUp;
bool isUpSimple = false;
isUpSimple = vFrom.TrySimpleTransformToAncestor(rootFrom,
false, /* do not apply inverse */
out gUp,
out mUp);
if (isUpSimple)
{
ptTranslated = mUp.Transform(ptTranslated);
}
else if (gUp.TryTransform(ptTranslated, out ptTranslated) == false)
{
// Error. Out parameter has been set false.
return(new Point());
}
// If no element was specified to translate to, we leave the coordinates
// translated to the root.
if (to != null)
{
// Get the containing and root visuals we are going to.
DependencyObject vTo = InputElement.GetContainingVisual(to);
Visual rootTo = InputElement.GetRootVisual(to) as Visual;
if (vTo != null && rootTo != null)
{
// If both are under the same root visual, we can easily translate the point
// between them by translating up to the root, and then back down.
//
// However, if both are under different roots, we can only translate
// between them if we know how to relate the two root visuals. Currently
// we only know how to do that if both roots are sourced in HwndSources.
if (rootFrom != rootTo)
{
HwndSource sourceFrom = PresentationSource.CriticalFromVisual(rootFrom) as HwndSource;
HwndSource sourceTo = PresentationSource.CriticalFromVisual(rootTo) as HwndSource;
if (sourceFrom != null && sourceFrom.CriticalHandle != IntPtr.Zero && sourceFrom.CompositionTarget != null &&
sourceTo != null && sourceTo.CriticalHandle != IntPtr.Zero && sourceTo.CompositionTarget != null)
{
// Translate the point into client coordinates.
ptTranslated = PointUtil.RootToClient(ptTranslated, sourceFrom);
// Translate the point into screen coordinates.
Point ptScreen = PointUtil.ClientToScreen(ptTranslated, sourceFrom);
// Translate the point back the the client coordinates of the To window.
ptTranslated = PointUtil.ScreenToClient(ptScreen, sourceTo);
// Translate the point back to the root element.
ptTranslated = PointUtil.ClientToRoot(ptTranslated, sourceTo);
}
else
{
// Error. Out parameter has been set false.
return(new Point());
}
}
// Translate the point from the root to the visual.
GeneralTransform gDown;
Matrix mDown;
Visual vToAsVisual = vTo as Visual;
if (vToAsVisual == null)
{
// must be a Visual3D
vToAsVisual = VisualTreeHelper.GetContainingVisual2D(vTo);
}
bool isDownSimple = vToAsVisual.TrySimpleTransformToAncestor(rootTo,
true, /* apply inverse */
out gDown,
out mDown);
if (isDownSimple)
{
ptTranslated = mDown.Transform(ptTranslated);
}
else if (gDown != null)
{
if (gDown.TryTransform(ptTranslated, out ptTranslated) == false)
{
// Error. Out parameter has been set false.
return(new Point());
}
}
else
{
// Error. Out parameter has been set false.
return(new Point());
}
}
else
{
// Error. Out parameter has been set false.
return(new Point());
}
}
}
else
{
// Error. Out parameter has been set false.
return(new Point());
}
translated = true;
return(ptTranslated);
}