Пример #1
0
func (l *List) VisibleItemRange(includePartiallyVisible bool) (startIndex, endIndex int) {
	if l.itemCount == 0 {
		return 0, 0
	}
	s := l.outer.Size()
	p := l.outer.Padding()
	majorAxisItemSize := l.MajorAxisItemSize()
	if majorAxisItemSize == 0 {
		return 0, 0
	}
	startIndex = l.scrollOffset
	if !includePartiallyVisible {
		startIndex += majorAxisItemSize - 1
	}
	if l.orientation.Horizontal() {
		endIndex = l.scrollOffset + s.W - p.W()
	} else {
		endIndex = l.scrollOffset + s.H - p.H()
	}
	if includePartiallyVisible {
		endIndex += majorAxisItemSize - 1
	}
	startIndex = math.Max(startIndex/majorAxisItemSize, 0)
	endIndex = math.Min(endIndex/majorAxisItemSize, l.itemCount)

	return startIndex, endIndex
}
Пример #2
0
func (l *List) SetScrollOffset(scrollOffset int) {
	if l.adapter == nil {
		return
	}
	s := l.outer.Size().Contract(l.outer.Padding())
	if l.orientation.Horizontal() {
		maxScroll := math.Max(l.itemSize.W*l.itemCount-s.W, 0)
		scrollOffset = math.Clamp(scrollOffset, 0, maxScroll)
		l.scrollBar.SetScrollPosition(scrollOffset, scrollOffset+s.W)
	} else {
		maxScroll := math.Max(l.itemSize.H*l.itemCount-s.H, 0)
		scrollOffset = math.Clamp(scrollOffset, 0, maxScroll)
		l.scrollBar.SetScrollPosition(scrollOffset, scrollOffset+s.H)
	}
	if l.scrollOffset != scrollOffset {
		l.scrollOffset = scrollOffset
		l.LayoutChildren()
	}
}
Пример #3
0
// InputEventHandler overrides
func (s *ScrollBar) Click(ev gxui.MouseEvent) (consume bool) {
	if !s.barRect.Contains(ev.Point) {
		p := s.positionAt(ev.Point)
		from, to := s.scrollPositionFrom, s.scrollPositionTo
		switch {
		case p < from:
			width := to - from
			from = math.Max(from-width, 0)
			s.SetScrollPosition(from, from+width)
		case p > to:
			width := to - from
			to = math.Min(to+width, s.scrollLimit)
			s.SetScrollPosition(to-width, to)
		}
	}
	return true
}
Пример #4
0
func (p *PanelHolder) RemovePanel(panel gxui.Control) {
	index := p.PanelIndex(panel)
	if index < 0 {
		panic("PanelHolder does not contain panel")
	}

	entry := p.entries[index]
	entry.MouseDownSubscription.Unlisten()
	p.entries = append(p.entries[:index], p.entries[index+1:]...)
	p.tabLayout.RemoveChildAt(index)

	if panel == p.selected.Panel {
		if p.PanelCount() > 0 {
			p.Select(math.Max(index-1, 0))
		} else {
			p.Select(-1)
		}
	}
}
Пример #5
0
func (l *List) DesiredSize(min, max math.Size) math.Size {
	if l.adapter == nil {
		return min
	}
	count := math.Max(l.itemCount, 1)
	var s math.Size
	if l.orientation.Horizontal() {
		s = math.Size{W: l.itemSize.W * count, H: l.itemSize.H}
	} else {
		s = math.Size{W: l.itemSize.W, H: l.itemSize.H * count}
	}
	if l.scrollBarEnabled {
		if l.orientation.Horizontal() {
			s.H += l.scrollBar.DesiredSize(min, max).H
		} else {
			s.W += l.scrollBar.DesiredSize(min, max).W
		}
	}
	return s.Expand(l.outer.Padding()).Clamp(min, max)
}
Пример #6
0
func generateLenHistogram(regexp string, maxLen int, args *GeneratorArgs) (counts []int) {
	generator, err := NewGenerator(regexp, args)
	if err != nil {
		panic(err)
	}

	iterations := math.Max(maxLen*4, SampleSize)

	for i := 0; i < iterations; i++ {
		str := generator.Generate()

		// Grow the slice if necessary.
		if len(str) >= len(counts) {
			newCounts := make([]int, len(str)+1)
			copy(newCounts, counts)
			counts = newCounts
		}

		counts[len(str)]++
	}

	return
}
Пример #7
0
func (t *TextBoxAdapter) Count() int {
	return math.Max(t.TextBox.controller.LineCount(), 1)
}
Пример #8
0
func (t *TextBoxController) IndexLeft(i int) int {
	return math.Max(i-1, 0)
}