Method SetRange

gridlayout.go:214–258

(widget Widget, r Rectangle)

}

func (l *GridLayout) SetRange(widget Widget, r Rectangle) error {
	if widget == nil {
		return newError("widget required")
	}
	if l.container == nil {
		return newError("container required")
	}
	if !l.container.Children().containsHandle(widget.Handle()) {
		return newError("widget must be child of container")
	}
	if r.X < 0 || r.Y < 0 {
		return newError("range.X and range.Y must be >= 0")
	}
	if r.Width < 1 || r.Height < 1 {
		return newError("range.Width and range.Height must be >= 1")
	}

	wb := widget.AsWidgetBase()

	info := l.widgetBase2Info[wb]
	if info == nil {
		info = new(gridLayoutWidgetInfo)
	} else {
		l.setWidgetOnCells(nil, rangeFromGridLayoutWidgetInfo(info))
	}

	l.ensureSufficientSize(r.Y+r.Height, r.X+r.Width)

	cell := &l.cells[r.Y][r.X]
	cell.row = r.Y
	cell.column = r.X

	if info.cell == nil {
		// We have to do this _after_ calling ensureSufficientSize().
		l.widgetBase2Info[wb] = info
	}

	info.cell = cell
	info.spanHorz = r.Width
	info.spanVert = r.Height

	l.setWidgetOnCells(widget, r)

	return nil
}

func (l *GridLayout) CreateLayoutItem(ctx *LayoutContext) ContainerLayoutItem {
	wb2Item := make(map[*WidgetBase]LayoutItem)