public override void PerformLayout(NanoVGDotNet.NVGcontext ctx, Widget widget)
{
int height = this.margin;
int width = (int)((0 < widget.fixedSize.X) ? widget.fixedSize.X : widget.width);
int availableWidth = width - 2 * this.margin;
Window window = widget as Window;
if (window && window.HasTitle())
{
height += (widget.theme.windowHeaderHeight - this.margin / 2);
}
bool first = true;
bool indent = false;
int childCount = widget.childCount;
for (int i = 0; childCount > i; ++i)
{
Widget child = widget.GetChild(i);
if (!child.isVisible)
{
continue;
}
Label label = child as Label;
if (!first)
{
height += (null == label) ? this.spacing : this.groupSpacing;
}
else
{
first = false;
}
int currIndent = (indent && (null == label)) ? this.groupIndent : 0;
Vector2 ps = child.GetPreferredSize(ctx);
ps.X = availableWidth - currIndent;
Vector2 targetSize = child.GetTargetSize(ctx, ps);
Vector2 pos;
pos.X = this.margin + currIndent;
pos.Y = height;
child.localPosition = pos;
child.size = targetSize;
child.PerformLayout(ctx);
height += (int)targetSize.Y;
if (label)
{
indent = label.HasCaption();
}
}
}
public override Vector2 GetPreferredSize(NanoVGDotNet.NVGcontext ctx, Widget widget)
{
Vector2 ret = Vector2.Zero;
int width = this.margin * 2;
int height = width;
Window window = widget as Window;
if (window && !string.IsNullOrEmpty(window.title))
{
height += widget.theme.windowHeaderHeight - margin / 2;
}
bool first = true;
bool indent = false;
int childCount = widget.childCount;
for (int i = 0; childCount > i; ++i)
{
Widget child = widget.GetChild(i);
if (!child.isVisible)
{
continue;
}
Label label = child as Label;
if (!first)
{
height += (null == label) ? this.spacing : this.groupSpacing;
}
else
{
first = false;
}
Vector2 targetSize = child.GetTargetSize(ctx);
bool indentCur = indent && (null == label);
height += (int)targetSize.Y;
width = (int)Math.Max(width, targetSize.X + 2 * this.margin + (indentCur ? this.groupIndent : 0f));
// start indent next child when we encounter non-empty label.
if (label)
{
indent = !string.IsNullOrEmpty(label.caption);
}
}
ret.X = width;
ret.Y = height;
return(ret);
}