public bool Start(IMouseInformation mouseInformation)
{
bool result = false;
if (_capturedHandler != null)
{
result = _capturedHandler.Start(mouseInformation);
if (result)
{
return(true);
}
}
_capturedHandler = null;
foreach (IGraphic graphic in EnumerateChildGraphics(true))
{
if (!graphic.Visible)
{
continue;
}
IMouseButtonHandler handler = graphic as IMouseButtonHandler;
if (handler != null)
{
result = handler.Start(mouseInformation);
if (result)
{
_capturedHandler = handler;
break;
}
}
}
return(result);
}
/// <summary>
/// Called by the framework each time a mouse button is pressed.
/// </summary>
/// <remarks>
/// <para>
/// As a general rule, if the <see cref="IMouseButtonHandler"/> object did anything as a result of this call, it must
/// return true. If false is returned, <see cref="IMouseButtonHandler.Start"/> is called on other <see cref="IMouseButtonHandler"/>s
/// until one returns true.
/// </para>
/// <para>
/// The <see cref="ControlGraphic"/> implementation finds a handler by trying <see cref="Start"/>,
/// and any child graphics implementing <see cref="IMouseButtonHandler"/>, in decreasing order of priority.
/// </para>
/// </remarks>
/// <param name="mouseInformation">The mouse input information.</param>
/// <returns>True if the <see cref="ControlGraphic"/> did something as a result of the call and hence would like to receive capture; False otherwise.</returns>
bool IMouseButtonHandler.Start(IMouseInformation mouseInformation)
{
bool result = false;
if (_capturedHandler != null)
{
result = _capturedHandler.Start(mouseInformation);
if (result)
{
return(true);
}
}
if (Enabled)
{
CoordinateSystem = CoordinateSystem.Destination;
try
{
if (HitTest(mouseInformation.Location))
{
_lastTrackedPosition = mouseInformation.Location;
_isTracking = true;
}
result = Start(mouseInformation);
_isTracking = _isTracking && result;
}
finally
{
ResetCoordinateSystem();
}
}
_capturedHandler = null;
if (!result)
{
foreach (IGraphic graphic in EnumerateChildGraphics(true))
{
if (!graphic.Visible)
{
continue;
}
IMouseButtonHandler handler = graphic as IMouseButtonHandler;
if (handler != null)
{
result = handler.Start(mouseInformation);
if (result)
{
_capturedHandler = handler;
break;
}
}
}
}
return(result);
}
private bool StartHandler(IMouseButtonHandler handler)
{
if (_selectedOnThisClick && SuppressOnTileActivate(handler))
{
return(false);
}
if (_clickCount > 1 && IgnoreDoubleClicks(handler))
{
return(false);
}
bool start = handler.Start(this);
if (start)
{
++_startCount;
}
return(start);
}
private bool StartHandler(IMouseButtonHandler handler)
{
if (_selectedOnThisClick && SuppressOnTileActivate(handler))
return false;
if (_clickCount > 1 && IgnoreDoubleClicks(handler))
return false;
bool start = handler.Start(this);
if (start)
++_startCount;
return start;
}