/// <summary>
/// Open the dialogue.
/// </summary>
/// <param name="x">World x coordinate.</param>
/// <param name="y">World y coordinate.</param>
/// <param name="content">Content to display.</param>
/// <param name="openDirection">Direction to open the dialogue towards.</param>
internal void Open(float x, float y, VisualElement content, MenuUtilities.OpenDirection openDirection = MenuUtilities.OpenDirection.DownLeft)
{
// Set new content
Clear();
Add(content);
// Set visible and give focus
RemoveFromClassList(UiConstants.ussHidden);
Focus();
BringToFront();
// Catch scrolling to avoid menu becoming detached.
parent.RegisterCallback <WheelEvent>(OnScroll, TrickleDown.TrickleDown);
// Catch clicks outside of the dialogue and close it.
parent.RegisterCallback <MouseDownEvent>(OnMouseDown, TrickleDown.TrickleDown);
// Catch window size changes so that the menu position can be fixed.
parent.RegisterCallback <GeometryChangedEvent>(OnGeometryChange, TrickleDown.TrickleDown);
content.RegisterCallback <GeometryChangedEvent>(SizeKnownCallback);
void SizeKnownCallback(GeometryChangedEvent _)
{
// Unregister now that we know it has a size.
content.UnregisterCallback <GeometryChangedEvent>(SizeKnownCallback);
// Set the position in the window
SetPosition(x, y, content, openDirection);
}
}
/// <summary>
/// Set the position of the dialogue.
/// </summary>
/// <param name="x">World x coordinate.</param>
/// <param name="y">World y coordinate.</param>
/// <param name="content">Content of the window.</param>
/// <param name="openDirection">Direction to open the dialogue towards.</param>
void SetPosition(float x, float y, VisualElement content, MenuUtilities.OpenDirection openDirection)
{
// Correct for the top left corner of the element based on the direction it opens.
switch (openDirection)
{
case MenuUtilities.OpenDirection.UpLeft:
x -= content.worldBound.width;
y -= content.worldBound.height;
break;
case MenuUtilities.OpenDirection.UpRight:
y -= content.worldBound.height;
break;
case MenuUtilities.OpenDirection.DownLeft:
x -= content.worldBound.width;
break;
case MenuUtilities.OpenDirection.DownRight:
break;
default:
throw new ArgumentOutOfRangeException(nameof(openDirection), openDirection, null);
}
// Set the position.
style.top = y - parent.worldBound.yMin;
style.left = x - parent.worldBound.xMin;
style.right = new StyleLength(StyleKeyword.Auto);
style.bottom = new StyleLength(StyleKeyword.Auto);
}