public bool ShouldSerializePositionY() => SerializeDefaults || !PositionY.Equals(ZPLForgeDefaults.Elements.PositionY);
// Calculate menu's position based on Anchor and parent's positions.
// If there is not enought space, then menu's size can be also resized.
private void CalculateMenuPosition()
{
if ((Anchor == null) || (Content == null))
{
return;
}
if (Items == null)
{
return;
}
if (SizeWidth.Equals(0) && SizeHeight.Equals(0))
{
return;
}
float menuScreenPosX = 0;
float menuScreenPosY = 0;
if (HorizontalPositionToAnchor == RelativePosition.Start)
{
if (GetRootView().LayoutDirection == ViewLayoutDirectionType.LTR)
{
menuScreenPosX = Anchor.ScreenPosition.X - SizeWidth;
}
else
{
menuScreenPosX = Anchor.ScreenPosition.X + Anchor.Margin.Start + Anchor.SizeWidth + Anchor.Margin.End;
}
}
else if (HorizontalPositionToAnchor == RelativePosition.Center)
{
menuScreenPosX = Anchor.ScreenPosition.X + Anchor.Margin.Start + (Anchor.SizeWidth / 2) - (SizeWidth / 2);
}
else
{
if (GetRootView().LayoutDirection == ViewLayoutDirectionType.LTR)
{
menuScreenPosX = Anchor.ScreenPosition.X + Anchor.Margin.Start + Anchor.SizeWidth + Anchor.Margin.End;
}
else
{
menuScreenPosX = Anchor.ScreenPosition.X - SizeWidth;
}
}
if (VerticalPositionToAnchor == RelativePosition.Start)
{
menuScreenPosY = Anchor.ScreenPosition.Y - SizeHeight;
}
else if (VerticalPositionToAnchor == RelativePosition.Center)
{
menuScreenPosY = Anchor.ScreenPosition.Y + Anchor.Margin.Top + (Anchor.SizeHeight / 2) - (SizeHeight / 2);
}
else
{
menuScreenPosY = Anchor.ScreenPosition.Y + Anchor.Margin.Top + Anchor.SizeHeight + Anchor.Margin.Bottom;
}
float menuSizeW = SizeWidth;
float menuSizeH = SizeHeight;
// Check if menu is not inside parent's boundary in x coordinate system.
if (menuScreenPosX + SizeWidth > Window.Size.Width)
{
if (HorizontalPositionToAnchor == RelativePosition.Center)
{
menuScreenPosX = Window.Size.Width - SizeWidth;
}
else
{
menuSizeW = Window.Size.Width - menuScreenPosX;
}
}
if (menuScreenPosX < 0)
{
menuScreenPosX = 0;
menuSizeW = Window.Size.Width;
}
// Check if menu is not inside parent's boundary in y coordinate system.
if (menuScreenPosY + SizeHeight > Window.Size.Height)
{
if (VerticalPositionToAnchor == RelativePosition.Center)
{
menuScreenPosY = Window.Size.Height - SizeHeight;
}
else
{
menuSizeH = Window.Size.Height - menuScreenPosY;
}
}
if (menuScreenPosY < 0)
{
menuScreenPosY = 0;
menuSizeH = Window.Size.Height;
}
// Position is relative to parent's coordinate system.
var menuPosX = menuScreenPosX;
var menuPosY = menuScreenPosY;
if (!PositionX.Equals(menuPosX) || !PositionY.Equals(menuPosY) || !SizeWidth.Equals(menuSizeW) || !SizeHeight.Equals(menuSizeH))
{
Position = new Position(menuPosX, menuPosY);
Size = new Size(menuSizeW, menuSizeH);
}
}