Method PerformLayout

gridlayout.go:575–668

()

}

func (li *gridLayoutItem) PerformLayout() []LayoutResultItem {
	widths := li.sectionSizesForSpace(Horizontal, li.geometry.ClientSize.Width, nil)
	heights := li.sectionSizesForSpace(Vertical, li.geometry.ClientSize.Height, widths)

	items := make([]LayoutResultItem, 0, len(li.item2Info))

	margins := MarginsFrom96DPI(li.margins96dpi, li.ctx.dpi)
	spacing := IntFrom96DPI(li.spacing96dpi, li.ctx.dpi)

	for item, info := range li.item2Info {
		if !shouldLayoutItem(item) {
			continue
		}

		x := margins.HNear
		for i := 0; i < info.cell.column; i++ {
			if w := widths[i]; w > 0 {
				x += w + spacing
			}
		}

		y := margins.VNear
		for i := 0; i < info.cell.row; i++ {
			if h := heights[i]; h > 0 {
				y += h + spacing
			}
		}

		width := li.spannedWidth(info, widths)
		height := li.spannedHeight(info, heights)

		w := width
		h := height

		if lf := item.LayoutFlags(); lf&GrowableHorz == 0 || lf&GrowableVert == 0 {
			var s Size
			if hfw, ok := item.(HeightForWidther); !ok || !hfw.HasHeightForWidth() {
				if is, ok := item.(IdealSizer); ok {
					s = is.IdealSize()
				}
			}

			max := item.Geometry().MaxSize
			if max.Width > 0 && s.Width > max.Width {
				s.Width = max.Width
			}
			if lf&GrowableHorz == 0 {
				w = s.Width
			}
			w = mini(w, width)

			if hfw, ok := item.(HeightForWidther); ok && hfw.HasHeightForWidth() {
				h = hfw.HeightForWidth(w)
			} else {
				if max.Height > 0 && s.Height > max.Height {
					s.Height = max.Height
				}
				if lf&GrowableVert == 0 {