Method sectionSizesForSpace

gridlayout.go:671–849

sectionSizesForSpace returns section sizes. Input and outpus is measured in native pixels.

(orientation Orientation, space int, widths []int)

// sectionSizesForSpace returns section sizes. Input and outpus is measured in native pixels.
func (li *gridLayoutItem) sectionSizesForSpace(orientation Orientation, space int, widths []int) []int {
	var stretchFactors []int
	if orientation == Horizontal {
		stretchFactors = li.columnStretchFactors
	} else {
		stretchFactors = li.rowStretchFactors
	}

	var sectionCountWithGreedyNonSpacer int
	var sectionCountWithGreedySpacer int
	var stretchFactorsTotal [3]int
	var minSizesRemaining int
	minSizes := make([]int, len(stretchFactors))
	maxSizes := make([]int, len(stretchFactors))
	sizes := make([]int, len(stretchFactors))
	sortedSections := gridLayoutSectionInfoList(make([]gridLayoutSectionInfo, len(stretchFactors)))

	for i := 0; i < len(stretchFactors); i++ {
		var otherAxisCount int
		if orientation == Horizontal {
			otherAxisCount = len(li.rowStretchFactors)
		} else {
			otherAxisCount = len(li.columnStretchFactors)
		}

		for j := 0; j < otherAxisCount; j++ {
			var item LayoutItem
			if orientation == Horizontal {
				item = li.cells[j][i].item
			} else {
				item = li.cells[i][j].item
			}

			if item == nil {
				continue
			}

			if !shouldLayoutItem(item) {
				continue
			}

			info := li.item2Info[item]
			flags := item.LayoutFlags()

			max := item.Geometry().MaxSize

			var pref Size
			if hfw, ok := item.(HeightForWidther); !ok || !hfw.HasHeightForWidth() {
				if is, ok := item.(IdealSizer); ok {
					pref = is.IdealSize()
				}
			}

			if orientation == Horizontal {
				if info.spanHorz == 1 {
					minSizes[i] = maxi(minSizes[i], li.MinSizeEffectiveForChild(item).Width)
				}