void SetContainerPosition(float x, float y)
{
var stage = _targetElement.GetStage();
if (stage == null)
{
return;
}
_container.Pack();
float offsetX = _manager.OffsetX, offsetY = _manager.OffsetY, dist = _manager.EdgeDistance;
var point = _targetElement.LocalToStageCoordinates(new Vector2(x + offsetX - _container.GetWidth() / 2,
y - offsetY - _container.GetHeight()));
if (point.Y < dist)
{
point = _targetElement.LocalToStageCoordinates(new Vector2(x + offsetX, y + offsetY));
}
if (point.X < dist)
{
point.X = dist;
}
if (point.X + _container.GetWidth() > stage.GetWidth() - dist)
{
point.X = stage.GetWidth() - dist - _container.GetWidth();
}
if (point.Y + _container.GetHeight() > stage.GetHeight() - dist)
{
point.Y = stage.GetHeight() - dist - _container.GetHeight();
}
_container.SetPosition(point.X, point.Y);
point = _targetElement.LocalToStageCoordinates(new Vector2(_targetElement.GetWidth() / 2,
_targetElement.GetHeight() / 2));
point -= new Vector2(_container.GetX(), _container.GetY());
_container.SetOrigin(point.X, point.Y);
}
public override void Layout()
{
var bg = _style.Background;
var hScrollKnob = _style.HScrollKnob;
var vScrollKnob = _style.VScrollKnob;
float bgLeftWidth = 0, bgRightWidth = 0, bgTopHeight = 0, bgBottomHeight = 0;
if (bg != null)
{
bgLeftWidth = bg.LeftWidth;
bgRightWidth = bg.RightWidth;
bgTopHeight = bg.TopHeight;
bgBottomHeight = bg.BottomHeight;
}
var width = GetWidth();
var height = GetHeight();
var scrollbarHeight = 0f;
if (hScrollKnob != null)
{
scrollbarHeight = hScrollKnob.MinHeight;
}
if (_style.HScroll != null)
{
scrollbarHeight = Math.Max(scrollbarHeight, _style.HScroll.MinHeight);
}
var scrollbarWidth = 0f;
if (vScrollKnob != null)
{
scrollbarWidth = vScrollKnob.MinWidth;
}
if (_style.VScroll != null)
{
scrollbarWidth = Math.Max(scrollbarWidth, _style.VScroll.MinWidth);
}
// Get available space size by subtracting background's padded area.
_areaWidth = width - bgLeftWidth - bgRightWidth;
_areaHeight = height - bgTopHeight - bgBottomHeight;
if (_widget == null)
{
return;
}
// Get widget's desired width.
float widgetWidth, widgetHeight;
if (_widget is ILayout)
{
var layout = _widget as ILayout;
widgetWidth = layout.PreferredWidth;
widgetHeight = layout.PreferredHeight;
}
else
{
widgetWidth = _widget.GetWidth();
widgetHeight = _widget.GetHeight();
}
// Determine if horizontal/vertical scrollbars are needed.
_scrollX = _forceScrollX || (widgetWidth > _areaWidth && !_disableX);
_scrollY = _forceScrollY || (widgetHeight > _areaHeight && !_disableY);
var fade = _fadeScrollBars;
if (!fade)
{
// Check again, now taking into account the area that's taken up by any enabled scrollbars.
if (_scrollY)
{
_areaWidth -= scrollbarWidth;
if (!_scrollX && widgetWidth > _areaWidth && !_disableX)
{
_scrollX = true;
}
}
if (_scrollX)
{
_areaHeight -= scrollbarHeight;
if (!_scrollY && widgetHeight > _areaHeight && !_disableY)
{
_scrollY = true;
_areaWidth -= scrollbarWidth;
}
}
}
// the bounds of the scrollable area for the widget.
_widgetAreaBounds = RectangleExt.FromFloats(bgLeftWidth, bgBottomHeight, _areaWidth, _areaHeight);
if (fade)
{
// Make sure widget is drawn under fading scrollbars.
if (_scrollX && _scrollY)
{
_areaHeight -= scrollbarHeight;
_areaWidth -= scrollbarWidth;
}
}
else
{
if (_scrollbarsOnTop)
{
// Make sure widget is drawn under non-fading scrollbars.
if (_scrollX)
{
_widgetAreaBounds.Height += (int)scrollbarHeight;
}
if (_scrollY)
{
_widgetAreaBounds.Width += (int)scrollbarWidth;
}
}
else
{
// Offset widget area y for horizontal scrollbar at bottom.
if (_scrollX && _hScrollOnBottom)
{
_widgetAreaBounds.Y += (int)scrollbarHeight;
}
// Offset widget area x for vertical scrollbar at left.
if (_scrollY && !_vScrollOnRight)
{
_widgetAreaBounds.X += (int)scrollbarWidth;
}
}
}
// If the widget is smaller than the available space, make it take up the available space.
widgetWidth = _disableX ? _areaWidth : Math.Max(_areaWidth, widgetWidth);
widgetHeight = _disableY ? _areaHeight : Math.Max(_areaHeight, widgetHeight);
_maxX = widgetWidth - _areaWidth;
_maxY = widgetHeight - _areaHeight;
if (fade)
{
// Make sure widget is drawn under fading scrollbars.
if (_scrollX && _scrollY)
{
_maxY -= scrollbarHeight;
_maxX -= scrollbarWidth;
}
}
SetScrollX(Mathf.Clamp(_amountX, 0, _maxX));
SetScrollY(Mathf.Clamp(_amountY, 0, _maxY));
// Set the bounds and scroll knob sizes if scrollbars are needed.
if (_scrollX)
{
if (hScrollKnob != null)
{
var hScrollHeight = _style.HScroll != null ? _style.HScroll.MinHeight : hScrollKnob.MinHeight;
// The corner gap where the two scroll bars intersect might have to flip from right to left.
var boundsX = _vScrollOnRight ? bgLeftWidth : bgLeftWidth + scrollbarWidth;
// Scrollbar on the top or bottom.
var boundsY = _hScrollOnBottom ? bgBottomHeight : height - bgTopHeight - hScrollHeight;
_hScrollBounds = RectangleExt.FromFloats(boundsX, boundsY, _areaWidth, hScrollHeight);
if (_variableSizeKnobs)
{
_hKnobBounds.Width = (int)Math.Max(hScrollKnob.MinWidth, (int)(_hScrollBounds.Width * _areaWidth / widgetWidth));
}
else
{
_hKnobBounds.Width = (int)hScrollKnob.MinWidth;
}
_hKnobBounds.Height = (int)hScrollKnob.MinHeight;
_hKnobBounds.X = _hScrollBounds.X + (int)((_hScrollBounds.Width - _hKnobBounds.Width) * GetScrollPercentX());
_hKnobBounds.Y = _hScrollBounds.Y;
}
else
{
_hScrollBounds = Rectangle.Empty;
_hKnobBounds = Rectangle.Empty;
}
}
if (_scrollY)
{
if (vScrollKnob != null)
{
var vScrollWidth = _style.VScroll != null ? _style.VScroll.MinWidth : vScrollKnob.MinWidth;
// the small gap where the two scroll bars intersect might have to flip from bottom to top
float boundsX, boundsY;
if (_hScrollOnBottom)
{
boundsY = height - bgTopHeight - _areaHeight;
}
else
{
boundsY = bgBottomHeight;
}
// bar on the left or right
if (_vScrollOnRight)
{
boundsX = width - bgRightWidth - vScrollWidth;
}
else
{
boundsX = bgLeftWidth;
}
_vScrollBounds = RectangleExt.FromFloats(boundsX, boundsY, vScrollWidth, _areaHeight);
_vKnobBounds.Width = (int)vScrollKnob.MinWidth;
if (_variableSizeKnobs)
{
_vKnobBounds.Height = (int)Math.Max(vScrollKnob.MinHeight, (int)(_vScrollBounds.Height * _areaHeight / widgetHeight));
}
else
{
_vKnobBounds.Height = (int)vScrollKnob.MinHeight;
}
if (_vScrollOnRight)
{
_vKnobBounds.X = (int)(width - bgRightWidth - vScrollKnob.MinWidth);
}
else
{
_vKnobBounds.X = (int)bgLeftWidth;
}
_vKnobBounds.Y = _vScrollBounds.Y + (int)((_vScrollBounds.Height - _vKnobBounds.Height) * (1 - GetScrollPercentY()));
}
else
{
_vScrollBounds = Rectangle.Empty;
_vKnobBounds = Rectangle.Empty;
}
}
_widget.SetSize(widgetWidth, widgetHeight);
if (_widget is ILayout)
{
((ILayout)_widget).Validate();
}
}