protected void UpdateButtonRecords(Point mousePos, params MouseButtonState[] states)
{
DateTime now = DateTime.Now;
int numOfPressedButtons = 0;
for (int i = 0; i < Math.Min(states.Length, MouseButtonRecords.Length); i++)
{
double deltaArea = Math.Abs(MouseButtonRecords[i].DragRefPoint.X - mousePos.X) *
Math.Abs(MouseButtonRecords[i].DragRefPoint.Y - mousePos.Y);
TimeSpan deltaTime = now - MouseButtonRecords[i].TimeStamp;
if (states[i] == MouseButtonState.Pressed)
{
if (MouseButtonRecords[i].State == MouseButtonState.Released)
{
MouseButtonRecords[i].DragRefPoint = mousePos;
MouseButtonRecords[i].TimeStamp = now;
}
if (!MouseButtonRecords[i].Flags.HasFlag(DDMouseButtonFlags.Dragging))
{
if ((deltaArea > ClickArea) || (deltaTime > ClickTime))
{
MouseButtonRecords[i].Flags |= DDMouseButtonFlags.StartedDrag;
MouseButtonRecords[i].Flags |= DDMouseButtonFlags.Dragging;
}
}
numOfPressedButtons++;
}
else
{
if (MouseButtonRecords[i].State == MouseButtonState.Pressed)
{
if ((deltaArea <= ClickArea) && (deltaTime <= ClickTime))
{
MouseButtonRecords[i].Flags |= DDMouseButtonFlags.Clicked;
}
if (MouseButtonRecords[i].Flags.HasFlag(DDMouseButtonFlags.Dragging))
{
MouseButtonRecords[i].Flags |= DDMouseButtonFlags.EndedDrag;
}
}
}
MouseButtonRecords[i].State = states[i];
}
if (DrawingArea != null)
{
if ((numOfPressedButtons > 0) && (Mouse.Captured == null))
{
DrawingArea.CaptureMouse();
}
else if ((numOfPressedButtons == 0) && (DrawingArea.IsMouseCaptured))
{
DrawingArea.ReleaseMouseCapture();
}
}
}
/*
* FUNCTION: DrawingArea_MouseDown
* DESCRIPTION:
* This method is used to determine where the mouse is clicked on the canvas.
* It also determines the start point for any shape the user has chosen.
* PARAMETERS:
* object sender - the sender of the event
* MouseButtonEventArgs - relative mouse event args based on sender
* RETURNS:
* None.
*/
private void DrawingArea_MouseDown(object sender, MouseButtonEventArgs e)
{
if (DrawingArea.CaptureMouse())
{
startPoint = e.GetPosition(DrawingArea);
switch (activeShapeType)
{
case ShapeType.line:
newShape = true;
var line = new Line
{
Stroke = strokeColor,
StrokeThickness = activeStrokeThickness,
X1 = startPoint.X,
Y1 = startPoint.Y,
X2 = startPoint.X,
Y2 = startPoint.Y,
StrokeDashArray = new DoubleCollection {
4
},
};
DrawingArea.Children.Add(line);
break;
case ShapeType.rectangle:
newShape = true;
var rectangle = new Rectangle
{
Stroke = strokeColor,
StrokeThickness = activeStrokeThickness,
Height = 0,
Width = 0,
StrokeDashArray = new DoubleCollection {
4
},
};
DrawingArea.Children.Add(rectangle);
break;
case ShapeType.ellipse:
newShape = true;
var ellipse = new Ellipse
{
Stroke = strokeColor,
StrokeThickness = activeStrokeThickness,
Height = 0,
Width = 0,
StrokeDashArray = new DoubleCollection {
4
},
};
DrawingArea.Children.Add(ellipse);
break;
}
if (this.Title[0] != '*')
{
this.Title = this.Title.Insert(0, "*");
}
}
}