public static bool HitTestCore(HitChain hitTestHint, HitTestHint layoutHint, IEnumerable <RenderElement> hitTestIter)
{
switch (layoutHint)
{
default:
{
foreach (RenderElement renderE in hitTestIter)
{
if (renderE.HitTestCore(hitTestHint))
{
return(true);
}
}
}
return(false);
case HitTestHint.HorizontalRowNonOverlap:
{
foreach (RenderElement renderE in hitTestIter)
{
if (renderE.HitTestCore(hitTestHint))
{
return(true);
}
else if (renderE.Right < hitTestHint.TestPointX)
{
//hitTestIter iterates from right to left
//so in this case (eg. we have whitespace between each elem)
//this should be stop
return(false);
}
}
}
return(false);
case HitTestHint.VerticalColumnNonOverlap:
{
foreach (RenderElement renderE in hitTestIter)
{
if (renderE.HitTestCore(hitTestHint))
{
return(true);
}
else if (renderE.Bottom < hitTestHint.TestPointY)
{
//hitTestIter iterates from bottom to top
//so in this case (eg. we have whitespace between each elem)
//this should be stop
return(false);
}
}
}
return(false);
}
}
public static void DrawChildContent(HitTestHint hitTestHint, IEnumerable <RenderElement> drawingIter, DrawBoard d, UpdateArea updateArea)
{
int enter_canvas_x = d.OriginX;
int enter_canvas_y = d.OriginY;
switch (hitTestHint)
{
default:
{
foreach (RenderElement child in drawingIter)
{
if (child.IntersectsWith(updateArea) ||
!child.NeedClipArea)
{
//if the child not need clip
//its children (if exist) may intersect
int x = child.X;
int y = child.Y;
d.SetCanvasOrigin(enter_canvas_x + x, enter_canvas_y + y);
updateArea.Offset(-x, -y);
RenderElement.Render(child, d, updateArea);
updateArea.Offset(x, y);
}
}
//restore
d.SetCanvasOrigin(enter_canvas_x, enter_canvas_y);
}
break;
case HitTestHint.HorizontalRowNonOverlap:
{
bool found = false;
foreach (RenderElement child in drawingIter)
{
if (child.IntersectsWith(updateArea))
{
found = true;
//if the child not need clip
//its children (if exist) may intersect
int x = child.X;
int y = child.Y;
d.SetCanvasOrigin(enter_canvas_x + x, enter_canvas_y + y);
updateArea.Offset(-x, -y);
RenderElement.Render(child, d, updateArea);
updateArea.Offset(x, y);
}
else if (found)
{
break;
}
}
//restore
d.SetCanvasOrigin(enter_canvas_x, enter_canvas_y);
}
break;
case HitTestHint.VerticalColumnNonOverlap:
{
bool found = false;
foreach (RenderElement child in drawingIter)
{
if (child.IntersectsWith(updateArea))
{
found = true;
//if the child not need clip
//its children (if exist) may intersect
int x = child.X;
int y = child.Y;
d.SetCanvasOrigin(enter_canvas_x + x, enter_canvas_y + y);
updateArea.Offset(-x, -y);
RenderElement.Render(child, d, updateArea);
updateArea.Offset(x, y);
}
else if (found)
{
break;
}
}
d.SetCanvasOrigin(enter_canvas_x, enter_canvas_y);
}
break;
}
}
