public override void Layout(LayoutEventArgs layoutEventArgs)
{
GuiWidget parent = layoutEventArgs.ParentWidget;
if (parent != null)
{
parent.SuspendLayout();
// if we didn't specify a chiled than achor all the children
if (layoutEventArgs.ChildWidget == null)
{
foreach (GuiWidget child in parent.Children)
{
if (child.Visible == false)
{
continue;
}
ApplyHAnchorToChild(parent, child);
ApplyVAnchorToChild(parent, child);
}
}
else
{
ApplyHAnchorToChild(parent, layoutEventArgs.ChildWidget);
ApplyVAnchorToChild(parent, layoutEventArgs.ChildWidget);
}
// make sure we fit to the children after anchoring
bool parentChangedSize = false;
DoFitToChildrenHorizontal(parent, ref parentChangedSize);
DoFitToChildrenVertical(parent, ref parentChangedSize);
// if we changed size again, than try one more time to anchor the children
if (parentChangedSize)
{
foreach (GuiWidget child in parent.Children)
{
if (child.Visible == false)
{
continue;
}
ApplyHAnchorToChild(parent, child);
ApplyVAnchorToChild(parent, child);
}
}
parent.ResumeLayout();
}
}
public override void Layout(LayoutEventArgs layoutEventArgs)
{
GuiWidget parent = layoutEventArgs.ParentWidget;
if (parent != null)
{
parent.SuspendLayout();
for (int i = 0; i < parent.Children.Count; i++)
{
GuiWidget child = parent.Children[i];
if (child.Visible == false)
{
continue;
}
ApplyHAnchorToChild(parent, child);
ApplyVAnchorToChild(parent, child);
}
DoLayoutChildren(layoutEventArgs);
FixOriginXIfRightToLeft(parent);
FixOriginYIfTopToBottom(parent);
bool parentChangedSize = false;
DoFitToChildrenHorizontal(parent, ref parentChangedSize);
DoFitToChildrenVertical(parent, ref parentChangedSize);
if (parentChangedSize)
{
foreach (GuiWidget child in parent.Children)
{
if (child.Visible == false)
{
continue;
}
ApplyHAnchorToChild(parent, child);
ApplyVAnchorToChild(parent, child);
}
DoLayoutChildren(layoutEventArgs);
}
parent.ResumeLayout();
}
}
public abstract void Layout(LayoutEventArgs layoutEventArgs);
public virtual void OnLayout(LayoutEventArgs layoutEventArgs)
{
#if DEBUG && DUMP_SLOW_TIMES
using (new DumpCallStackIfSlow(dumpIfLongerThanTime, "OnLayout"))
#endif
{
if (Visible && layoutSuspendCount < 1)
{
if (LayoutEngine != null)
{
SuspendLayout();
LayoutEngine.Layout(layoutEventArgs);
ResumeLayout();
}
if (Layout != null)
{
Layout(this, layoutEventArgs);
}
}
}
}
private void DoLayoutChildren(LayoutEventArgs layoutEventArgs)
{
GuiWidget parent = layoutEventArgs.ParentWidget;
if (parent.CountVisibleChildren() == 0)
{
return;
}
RectangleDouble boundsOfAllChildrenIncludingMargin = RectangleDouble.ZeroIntersection;
double totalWidthWithMargin = 0;
double totalHeightWithMargin = 0;
double totalWidthOfStaticItems = 0;
double totalHeightOfStaticItems = 0;
int numItemsNeedingExpanding = 0;
double totalMinimumWidthOfAllItems = 0;
double totalMinimumHeightOfAllItems = 0;
for (int childIndex = 0; childIndex < parent.Children.Count; childIndex++)
{
GuiWidget child = parent.Children[childIndex];
if (child.Visible == false)
{
continue;
}
RectangleDouble childBoundsWithMargin = child.LocalBounds;
childBoundsWithMargin.Inflate(child.Margin);
totalWidthWithMargin += childBoundsWithMargin.Width;
totalHeightWithMargin += childBoundsWithMargin.Height;
boundsOfAllChildrenIncludingMargin.ExpandToInclude(childBoundsWithMargin);
switch (FlowDirection)
{
case UI.FlowDirection.LeftToRight:
case UI.FlowDirection.RightToLeft:
totalMinimumWidthOfAllItems += child.MinimumSize.x + child.Margin.Width;
totalMinimumHeightOfAllItems = Math.Max(totalMinimumHeightOfAllItems, child.MinimumSize.y + child.Margin.Height);
if (child.HAnchorIsSet(HAnchor.ParentLeftRight))
{
numItemsNeedingExpanding++;
totalWidthOfStaticItems += child.Margin.Width;
}
else if (child.HAnchor == HAnchor.None || child.HAnchorIsSet(HAnchor.FitToChildren))
{
totalWidthOfStaticItems += childBoundsWithMargin.Width;
}
else
{
throw new Exception("Only None or ParentLeftRight are valid HAnchor for a horizontal flowWidget.");
}
break;
case UI.FlowDirection.TopToBottom:
case UI.FlowDirection.BottomToTop:
totalMinimumWidthOfAllItems = Math.Max(totalMinimumWidthOfAllItems, child.MinimumSize.x + child.Margin.Width);
totalMinimumHeightOfAllItems += child.MinimumSize.y + child.Margin.Height;
if (child.VAnchorIsSet(VAnchor.ParentBottomTop))
{
numItemsNeedingExpanding++;
totalHeightOfStaticItems += child.Margin.Height;
}
else if (child.VAnchor == VAnchor.None || child.VAnchorIsSet(VAnchor.FitToChildren))
{
totalHeightOfStaticItems += childBoundsWithMargin.Height;
}
else
{
throw new Exception("Only None or ParentBottomTop are valid VAnchor for a vertial flowWidget.");
}
break;
default:
throw new NotImplementedException();
}
}
switch (FlowDirection)
{
case UI.FlowDirection.LeftToRight:
{
double curX = parent.Padding.Left;
foreach (GuiWidget child in parent.Children)
{
if (child.Visible == true)
{
double newX = curX - child.LocalBounds.Left + child.Margin.Left;
child.OriginRelativeParent = new Vector2(newX, child.OriginRelativeParent.y);
if (child.HAnchorIsSet(HAnchor.ParentLeftRight))
{
RectangleDouble curChildBounds = child.LocalBounds;
double newWidth = (parent.LocalBounds.Width - parent.Padding.Width - totalWidthOfStaticItems) / numItemsNeedingExpanding;
child.LocalBounds = new RectangleDouble(curChildBounds.Left, curChildBounds.Bottom,
newWidth, curChildBounds.Top);
}
curX += child.LocalBounds.Width + child.Margin.Width;
}
}
}
break;
case UI.FlowDirection.RightToLeft:
{
double curX = parent.LocalBounds.Right - parent.Padding.Right;
foreach (GuiWidget child in parent.Children)
{
if (child.Visible == true)
{
if (child.HAnchorIsSet(HAnchor.ParentLeftRight))
{
RectangleDouble curChildBounds = child.LocalBounds;
double newWidth = (parent.LocalBounds.Width - parent.Padding.Width - totalWidthOfStaticItems) / numItemsNeedingExpanding;
child.LocalBounds = new RectangleDouble(curChildBounds.Left, curChildBounds.Bottom,
newWidth, curChildBounds.Top);
}
double newX = curX - child.LocalBounds.Left - (child.LocalBounds.Width + child.Margin.Right);
child.OriginRelativeParent = new Vector2(newX, child.OriginRelativeParent.y);
curX -= (child.LocalBounds.Width + child.Margin.Width);
}
}
}
break;
case UI.FlowDirection.BottomToTop:
{
double curY = parent.Padding.Bottom;
foreach (GuiWidget child in parent.Children)
{
if (child.Visible == true)
{
double newY = curY - child.LocalBounds.Bottom + child.Margin.Bottom;
child.OriginRelativeParent = new Vector2(child.OriginRelativeParent.x, newY);
if (child.VAnchorIsSet(VAnchor.ParentBottomTop))
{
RectangleDouble curChildBounds = child.LocalBounds;
double newHeight = (parent.LocalBounds.Height - parent.Padding.Height - totalHeightOfStaticItems) / numItemsNeedingExpanding;
child.LocalBounds = new RectangleDouble(curChildBounds.Left, curChildBounds.Bottom,
curChildBounds.Right, newHeight);
}
curY += child.LocalBounds.Height + child.Margin.Height;
}
}
}
break;
case UI.FlowDirection.TopToBottom:
{
double curY = parent.LocalBounds.Top - parent.Padding.Top;
foreach (GuiWidget child in parent.Children)
{
if (child.Visible == true)
{
if (child.VAnchorIsSet(VAnchor.ParentBottomTop))
{
RectangleDouble curChildBounds = child.LocalBounds;
double newHeight = (parent.LocalBounds.Height - parent.Padding.Height - totalHeightOfStaticItems) / numItemsNeedingExpanding;
child.LocalBounds = new RectangleDouble(curChildBounds.Left, curChildBounds.Bottom,
curChildBounds.Right, newHeight);
}
double newY = curY - child.LocalBounds.Bottom - (child.LocalBounds.Height + child.Margin.Top);
child.OriginRelativeParent = new Vector2(child.OriginRelativeParent.x, newY);
curY -= (child.LocalBounds.Height + child.Margin.Height);
}
}
}
break;
default:
throw new NotImplementedException();
}
}
public abstract void Layout(LayoutEventArgs layoutEventArgs);
