public void Arrange(UIElement element, Rectangle availableSize)
{
var bounds = new Rectangle((int)element.Position.X, (int)element.Position.Y, (int)element.Width, (int)element.Height);
// Set the X position
switch (element.HorizontalAlignment)
{
case HorizontalAlignment.Left:
element.Position.X = availableSize.Left;
break;
case HorizontalAlignment.Stretch:
case HorizontalAlignment.Center:
element.Position.X = availableSize.Center.X - (bounds.Width / 2);
break;
case HorizontalAlignment.Right:
element.Position.X = availableSize.Right - bounds.Width;
break;
}
// Set the Y position
switch (element.VerticalAlignment)
{
case VerticalAlignment.Top:
element.Position.Y = availableSize.Top;
break;
case VerticalAlignment.Stretch:
case VerticalAlignment.Center:
element.Position.Y = availableSize.Center.Y - (bounds.Height / 2);
break;
case VerticalAlignment.Bottom:
element.Position.Y = availableSize.Bottom - bounds.Height;
break;
}
// Apply margins
element.Position.X += element.Margin.Left;
element.Position.X -= element.Margin.Right;
element.Position.Y += element.Margin.Top;
element.Position.Y -= element.Margin.Bottom;
}
public void Arrange(UIElement element)
{
Arrange(element, availableSize);
}
private void HandleMouseHover()
{
var element = GetElementAffectedByMouseEvent(Elements);
if (element != null)
{
if (currentlyHighlightedElement != element)
{
element.IsHighlighted = true;
if (currentlyHighlightedElement != null)
{
currentlyHighlightedElement.IsHighlighted = false;
}
currentlyHighlightedElement = element;
// Fire the state-change event
if (ElementStateChanged != null)
{
ElementStateChanged(element, new ElementStateChangeArgs() { State = ElementState.Highlighted });
}
}
}
}
private void HandleLeftMouseButtonPressed(MouseState mouseState)
{
if (inputContext.Mouse.MouseState[MouseInputType.LeftButton].WasJustPressed)
{
var element = GetElementAffectedByMouseEvent(Elements);
if (element != null)
{
if (currentlyFocusedElement != element)
{
element.IsFocused = true;
if (currentlyFocusedElement != null)
{
currentlyFocusedElement.IsFocused = false;
}
currentlyFocusedElement = element;
}
element.HandleMouseEvent(mouseState);
// Fire the state-change event
if (ElementStateChanged != null)
{
ElementStateChanged(element, new ElementStateChangeArgs() { State = ElementState.Focused });
}
}
}
}
private UIElement GetChildElementAffectedByMouseEvent(UIElement element)
{
if (element is Panel)
{
return GetElementAffectedByMouseEvent((element as Panel).Children);
}
else if (element is StackPanel)
{
return GetElementAffectedByMouseEvent((element as StackPanel).Children);
}
return element;
}
public void SetFocus(UIElement element)
{
ClearFocus();
element.SetFocus(true);
currentlyFocusedElement = element;
currentlyHighlightedElement = null;
}
public void ClearFocus()
{
if (currentlyFocusedElement != null)
{
currentlyFocusedElement.SetFocus(false);
}
currentlyFocusedElement = null;
}