Method layoutScene

core/render.go:95–130

layoutScene does a layout of the scene: Size, Position

()

// layoutScene does a layout of the scene: Size, Position
func (sc *Scene) layoutScene() {
	if DebugSettings.LayoutTrace {
		fmt.Println("\n############################\nLayoutScene SizeUp start:", sc)
	}
	sc.SizeUp()
	sz := &sc.Geom.Size
	sz.Alloc.Total.SetPoint(sc.sceneGeom.Size)
	sz.setContentFromTotal(&sz.Alloc)
	// sz.Actual = sz.Alloc // todo: is this needed??
	if DebugSettings.LayoutTrace {
		fmt.Println("\n############################\nSizeDown start:", sc)
	}
	maxIter := 3
	for iter := 0; iter < maxIter; iter++ { // 3  > 2; 4 same as 3
		redo := sc.SizeDown(iter)
		if redo && iter < maxIter-1 {
			if DebugSettings.LayoutTrace {
				fmt.Println("\n############################\nSizeDown redo:", sc, "iter:", iter+1)
			}
		} else {
			break
		}
	}
	if DebugSettings.LayoutTrace {
		fmt.Println("\n############################\nSizeFinal start:", sc)
	}
	sc.SizeFinal()
	if DebugSettings.LayoutTrace {
		fmt.Println("\n############################\nPosition start:", sc)
	}
	sc.Position()
	if DebugSettings.LayoutTrace {
		fmt.Println("\n############################\nScenePos start:", sc)
	}
	sc.ApplyScenePos()
}

// layoutRenderScene does a layout and render of the tree:
// GetSize, DoLayout, Render.  Needed after Config.