private void OnPreviewInput(object sender, MouseWheelInputEventArgs e)
{
Debug.Assert(Equals(sender, Element));
var client = _clients.FirstOrDefault(c => c.IsActive);
client?.OnPreviewInput(sender, e);
}
private void OnPreviewMouseWheel(object sender, MouseWheelEventArgs e)
{
// update wheel motion info
var wheel = e.MouseDevice.GetWheel();
var timestamp = e.Timestamp < 0 ? 0 : e.Timestamp;
var info = wheel.PreTransmit(timestamp, e.Delta);
// 1. Tunneling event
// Clients and behaviors use this tunneling event to update the wheel transfer
// case by dynamically creating / retrieving motion shafts.
var originalSource = GetOriginalSource(e);
var inputEventArgs = new MouseWheelInputEventArgs(this, wheel, e)
{
RoutedEvent = PreviewMouseWheelInputEvent
};
originalSource.RaiseEvent(inputEventArgs);
// In cooperation with clients and behaviors, if inputEventArgs.Handled is set to true,
// the controller lets the underlying mouse wheel tunneling event continue its route.
if (inputEventArgs.Handled)
{
return;
}
// Fill motion reservoir
wheel.Transmit(info, e.Delta, null);
// 2. Bubbling event
// Clients consume the motion here
inputEventArgs.RoutedEvent = MouseWheelInputEvent;
originalSource.RaiseEvent(inputEventArgs);
// 3. Remaining motion is processed here
inputEventArgs.EndCommand();
e.Handled = true;
}
private void OnInput(object sender, MouseWheelInputEventArgs e)
{
Debug.Assert(Equals(sender, Element));
e.Controller = this;
var client = _clients.FirstOrDefault(c => c.IsActive);
if (client != null)
{
_exitElement = client.ExitElement;
client.OnInput(sender, e);
}
}
protected bool TransferMotion(MouseWheelInputEventArgs e)
{
var shaft = GetMotionShaft(e.Wheel);
if (shaft.Transfer(MotionInput, e))
{
return(true); // client can still move - stop event propagation
}
if (NestedMotionEnabled)
{
return(false); // let the mouse wheel event propagate up the visual tree
}
// empty the shaft transfer staging area and stop event propagation
return(shaft.Transfer(NativeMotionTarget.Terminal, e));
}
public virtual void OnInput(object sender, MouseWheelInputEventArgs e)
{
e.Handled = TransferMotion(e);
}
public virtual void OnPreviewInput(object sender, MouseWheelInputEventArgs e)
{
e.Handled = GetMotionShaft(e.Wheel) == null;
}
public override void OnInput(object sender, MouseWheelInputEventArgs e)
{
e.Handled = TransferMotionNative(e);
}
protected bool TransferMotionNative(MouseWheelInputEventArgs e)
{
return GetMotionShaft(e.Wheel).Transfer(this as INativeMotionTarget, e);
}
private void OnInput(object sender, MouseWheelInputEventArgs e)
{
Debug.Assert(sender == Element);
e.Controller = this;
var client = _clients.FirstOrDefault(c => c.IsActive);
if (client != null)
{
_exitElement = client.ExitElement;
client.OnInput(sender, e);
}
}
private void OnPreviewInput(object sender, MouseWheelInputEventArgs e)
{
Debug.Assert(sender == Element);
var client = _clients.FirstOrDefault(c => c.IsActive);
if (client != null)
client.OnPreviewInput(sender, e);
}
private void OnPreviewMouseWheel(object sender, MouseWheelEventArgs e)
{
// update wheel motion info
var wheel = e.MouseDevice.GetWheel();
var info = wheel.PreTransmit(e.Timestamp, e.Delta);
// 1. Tunneling event
// Clients and behaviors use this tunneling event to update the wheel transfer
// case by dynamically creating / retrieving motion shafts.
var originalSource = GetOriginalSource(e);
var inputEventArgs = new MouseWheelInputEventArgs(this, wheel, e) { RoutedEvent = PreviewMouseWheelInputEvent };
originalSource.RaiseEvent(inputEventArgs);
// In cooperation with clients and behaviors, if inputEventArgs.Handled is set to true,
// the controller lets the underlying mouse wheel tunneling event continue its route.
if (inputEventArgs.Handled)
return;
// Fill motion reservoir
wheel.Transmit(info, e.Delta, null);
// 2. Bubbling event
// Clients consume the motion here
inputEventArgs.RoutedEvent = MouseWheelInputEvent;
originalSource.RaiseEvent(inputEventArgs);
// 3. Remaining motion is processed here
inputEventArgs.EndCommand();
e.Handled = true;
}
public virtual void OnInput(object sender, MouseWheelInputEventArgs e) { e.Handled = TransferMotion(e); }
public virtual void OnPreviewInput(object sender, MouseWheelInputEventArgs e) { e.Handled = GetMotionShaft(e.Wheel) == null; }
public override void OnInput(object sender, MouseWheelInputEventArgs e) { e.Handled = TransferMotionNative(e); }
protected bool TransferMotion(MouseWheelInputEventArgs e)
{
var shaft = GetMotionShaft(e.Wheel);
if (shaft.Transfer(MotionInput, e))
return true; // client can still move - stop event propagation
if (NestedMotionEnabled)
return false; // let the mouse wheel event propagate up the visual tree
// empty the shaft transfer staging area and stop event propagation
return shaft.Transfer(NativeMotionTarget.Terminal, e);
}
protected bool TransferMotionNative(MouseWheelInputEventArgs e)
{
return(GetMotionShaft(e.Wheel).Transfer(this, e));
}
public void OnInput(object sender, MouseWheelInputEventArgs e)
{
Behavior.OnInput(sender, e);
}
public void OnInput(object sender, MouseWheelInputEventArgs e) { Behavior.OnInput(sender, e); }