protected void UpdateLayout()
{
float contentWidth = sourceWidth;
float contentHeight = sourceHeight;
if (_autoSize)
{
_updatingLayout = true;
if (contentWidth == 0)
{
contentWidth = 50;
}
if (contentHeight == 0)
{
contentHeight = 30;
}
SetSize(contentWidth, contentHeight);
_updatingLayout = false;
if (_width == contentWidth && _height == contentHeight)
{
_content.SetXY(0, 0);
_content.SetScale(1, 1);
InvalidateBatchingState();
return;
}
//如果不相等，可能是由于大小限制造成的，要后续处理
}
float sx = 1, sy = 1;
if (_fill != FillType.None)
{
sx = this.width / sourceWidth;
sy = this.height / sourceHeight;
if (sx != 1 || sy != 1)
{
if (_fill == FillType.ScaleMatchHeight)
{
sx = sy;
}
else if (_fill == FillType.ScaleMatchWidth)
{
sy = sx;
}
else if (_fill == FillType.Scale)
{
if (sx > sy)
{
sx = sy;
}
else
{
sy = sx;
}
}
else if (_fill == FillType.ScaleNoBorder)
{
if (sx > sy)
{
sy = sx;
}
else
{
sx = sy;
}
}
if (_shrinkOnly)
{
if (sx > 1)
{
sx = 1;
}
if (sy > 1)
{
sy = 1;
}
}
contentWidth = sourceWidth * sx;
contentHeight = sourceHeight * sy;
}
}
_content.SetScale(sx, sy);
float nx;
float ny;
if (_align == AlignType.Center)
{
nx = (this.width - contentWidth) / 2;
}
else if (_align == AlignType.Right)
{
nx = this.width - contentWidth;
}
else
{
nx = 0;
}
if (_verticalAlign == VertAlignType.Middle)
{
ny = (this.height - contentHeight) / 2;
}
else if (_verticalAlign == VertAlignType.Bottom)
{
ny = this.height - contentHeight;
}
else
{
ny = 0;
}
_content.SetXY(nx, ny);
InvalidateBatchingState();
}
