/// <summary>
/// Handle mouse click on the game screen
/// </summary>
private void handleMouse()
{
MouseState mouseState = Mouse.GetState();
XnaUIComponent target = ((XnaUITestGame)Game).MouseInputEngine.GetTarget(new Point(mouseState.X, mouseState.Y));
bool within = false;
while (target != null)
{
if (target == this)
{
within = true;
break;
}
target = target.Parent;
}
if (within)
{
Point mousePoint = new Point(ScrollX + mouseState.X, ScrollY + mouseState.Y);
leftButtonStrategy.HandleMouseInput(mouseState.LeftButton == ButtonState.Pressed, mouseState.RightButton == ButtonState.Pressed, mousePoint);
}
else
{
leftButtonStrategy.CancelProgress();
}
}
public XnaUIComponent GetTarget(Point p)
{
XnaUIComponent current = frame;
bool searching = true;
while (searching)
{
p.X += current.ScrollX;
p.Y += current.ScrollY;
searching = false;
for (int i = current.GetChildren().Count - 1; i >= 0; i--)
{
XnaUIComponent component = current.GetChildren()[i];
if (component.Visible)
{
Rectangle box = new Rectangle(component.DrawBox.X, component.DrawBox.Y, component.DrawBox.Width, component.DrawBox.Height);
if (contains(p, box))
{
current = component;
p.X -= component.DrawBox.X;
p.Y -= component.DrawBox.Y;
searching = true;
break;
}
}
}
}
return(current);
}
private XnaUIComponent getCommonAncestor(XnaUIComponent c1, XnaUIComponent c2)
{
List <XnaUIComponent> list1 = new List <XnaUIComponent>();
XnaUIComponent current = c1;
while (current != null)
{
list1.Add(current);
current = current.Parent;
}
List <XnaUIComponent> list2 = new List <XnaUIComponent>();
current = c2;
while (current != null)
{
list2.Add(current);
current = current.Parent;
}
int differenceInSize = Math.Abs(list1.Count - list2.Count);
List <XnaUIComponent> longerList = list2.Count > list1.Count ? list2 : list1;
while (differenceInSize > 0)
{
longerList.RemoveAt(0);
differenceInSize--;
}
XnaUIComponent commonAncestor = null;
for (int i = 0; i < list1.Count; i++)
{
if (list1[i] == list2[i])
{
commonAncestor = list1[i];
break;
}
}
return(commonAncestor);
}
public override void Update(GameTime gameTime)
{
MouseState mouseState = Mouse.GetState();
Point mousePoint = new Point(mouseState.X, mouseState.Y);
XnaUIComponent currentUIOn = GetTarget(mousePoint);
// Fire all events for mouse down, mouse up, and clicks
if (mouseState.LeftButton == ButtonState.Pressed)
{
if (leftMouseDownTarget == null)
{
leftMouseDownTarget = GetTarget(mousePoint);
XnaMouseEventArgs e = new XnaMouseEventArgs();
e.Target = leftMouseDownTarget;
e.ClickLocation = mousePoint;
e.Handled = false;
e.Bubbled = false;
e.ButtonPressed = MouseButton.Left;
e.SingleTarget = true;
e.time = System.Environment.TickCount;
frame.MouseDown(e);
}
}
else
{
if (leftMouseDownTarget != null)
{
XnaUIComponent leftMouseUpTarget = currentUIOn;
XnaUIComponent commonAncestor = getCommonAncestor(leftMouseDownTarget, leftMouseUpTarget);
if (commonAncestor != null)
{
XnaMouseEventArgs mouseUpEventArgs = new XnaMouseEventArgs();
mouseUpEventArgs.Target = commonAncestor;
mouseUpEventArgs.ClickLocation = mousePoint;
mouseUpEventArgs.Handled = false;
mouseUpEventArgs.Bubbled = false;
mouseUpEventArgs.ButtonPressed = MouseButton.Left;
mouseUpEventArgs.SingleTarget = (leftMouseDownTarget == leftMouseUpTarget);
mouseUpEventArgs.time = System.Environment.TickCount;
frame.MouseUp(mouseUpEventArgs);
XnaMouseEventArgs e = new XnaMouseEventArgs();
e.Target = commonAncestor;
e.ClickLocation = mousePoint;
e.Handled = false;
e.Bubbled = false;
e.ButtonPressed = MouseButton.Left;
e.SingleTarget = (leftMouseDownTarget == leftMouseUpTarget);
e.time = System.Environment.TickCount;
frame.Click(e);
}
// Reset the state.
leftMouseDownTarget = null;
}
}
if (mouseState.RightButton == ButtonState.Pressed)
{
if (rightMouseDownTarget == null)
{
rightMouseDownTarget = currentUIOn;
XnaMouseEventArgs e = new XnaMouseEventArgs();
e.Target = rightMouseDownTarget;
e.ClickLocation = mousePoint;
e.Handled = false;
e.Bubbled = false;
e.ButtonPressed = MouseButton.Right;
e.SingleTarget = true;
e.time = System.Environment.TickCount;
frame.MouseDown(e);
}
}
else
{
if (rightMouseDownTarget != null)
{
XnaUIComponent rightMouseUpTarget = GetTarget(mousePoint);
XnaUIComponent commonAncestor = getCommonAncestor(rightMouseDownTarget, rightMouseUpTarget);
if (commonAncestor != null)
{
XnaMouseEventArgs mouseUpEventArgs = new XnaMouseEventArgs();
mouseUpEventArgs.Target = commonAncestor;
mouseUpEventArgs.ClickLocation = mousePoint;
mouseUpEventArgs.Handled = false;
mouseUpEventArgs.Bubbled = false;
mouseUpEventArgs.ButtonPressed = MouseButton.Left;
mouseUpEventArgs.SingleTarget = (rightMouseDownTarget == rightMouseUpTarget);
mouseUpEventArgs.time = System.Environment.TickCount;
frame.MouseUp(mouseUpEventArgs);
XnaMouseEventArgs e = new XnaMouseEventArgs();
e.Target = commonAncestor;
e.ClickLocation = mousePoint;
e.Handled = false;
e.Bubbled = false;
e.ButtonPressed = MouseButton.Right;
e.SingleTarget = (rightMouseDownTarget == rightMouseUpTarget);
e.time = System.Environment.TickCount;
frame.Click(e);
}
// Reset the state.
rightMouseDownTarget = null;
}
}
// Handle mouse enter and exit events.
if (mouseHoverTarget != currentUIOn)
{
// Base case : First time entering.
if (mouseHoverTarget == null)
{
XnaUIComponent current = currentUIOn;
Stack <XnaUIComponent> stack = new Stack <XnaUIComponent>();
while (current != null)
{
stack.Push(current);
current = current.Parent;
}
while (stack.Count > 0)
{
current = stack.Pop();
current.MouseEnter();
}
}
else
{
// Mouse has moved
XnaUIComponent current = mouseHoverTarget;
XnaUIComponent ancestor = getCommonAncestor(currentUIOn, mouseHoverTarget);
while (current != ancestor)
{
current.MouseLeave();
current = current.Parent;
}
current = currentUIOn;
Stack <XnaUIComponent> stack = new Stack <XnaUIComponent>();
while (current != ancestor)
{
stack.Push(current);
current = current.Parent;
}
while (stack.Count > 0)
{
current = stack.Pop();
current.MouseEnter();
}
}
mouseHoverTarget = currentUIOn;
}
base.Update(gameTime);
}
