func (b *ProgressBar) SetSize(size math.Size) {
b.ProgressBar.SetSize(size)
b.chevrons = nil
if size.Area() > 0 {
b.chevrons = b.theme.Driver().CreateCanvas(size)
b.chevronWidth = size.H / 2
cw := b.chevronWidth
for x := -cw * 2; x < size.W; x += cw * 2 {
// x0 x2
// | x1 | x3
// | |
// A-----B - y0
// \ \
// \ \
// F C - y1
// / /
// / /
// E-----D - y2
y0, y1, y2 := 0, size.H/2, size.H
x0, x1 := x, x+cw/2
x2, x3 := x0+cw, x1+cw
var chevron = gxui.Polygon{
/* A */ gxui.PolygonVertex{Position: math.Point{X: x0, Y: y0}},
/* B */ gxui.PolygonVertex{Position: math.Point{X: x2, Y: y0}},
/* C */ gxui.PolygonVertex{Position: math.Point{X: x3, Y: y1}},
/* D */ gxui.PolygonVertex{Position: math.Point{X: x2, Y: y2}},
/* E */ gxui.PolygonVertex{Position: math.Point{X: x0, Y: y2}},
/* F */ gxui.PolygonVertex{Position: math.Point{X: x1, Y: y1}},
}
b.chevrons.DrawPolygon(chevron, gxui.TransparentPen, gxui.CreateBrush(gxui.Gray30))
}
b.chevrons.Complete()
}
}
func (v *viewport) SetSizeDips(size math.Size) {
v.driver.syncDriver(func() {
v.sizeDips = size
v.sizeDipsUnscaled = size.ScaleS(v.scaling)
v.window.SetSize(v.sizeDipsUnscaled.W, v.sizeDipsUnscaled.H)
})
}
func (f *font) Measure(fl *gxui.TextBlock) math.Size {
size := math.Size{W: 0, H: f.glyphMaxSizeDips.H}
var offset math.Point
for _, r := range fl.Runes {
if r == '\n' {
offset.X = 0
offset.Y += f.glyphMaxSizeDips.H
continue
}
offset.X += f.advanceDips(r)
size = size.Max(math.Size{W: offset.X, H: offset.Y + f.glyphMaxSizeDips.H})
}
return size
}
func createGlyphPage(resolution resolution, glyphMaxSizePixels math.Size) *glyphPage {
// Handle exceptionally large glyphs.
size := math.Size{W: glyphPageWidth, H: glyphPageHeight}.Max(glyphMaxSizePixels)
size.W = align(size.W, glyphSizeAlignment)
size.H = align(size.H, glyphSizeAlignment)
return &glyphPage{
resolution: resolution,
glyphMaxSizePixels: glyphMaxSizePixels,
size: size,
image: image.NewAlpha(image.Rect(0, 0, size.W, size.H)),
offsets: make(map[rune]math.Point),
rowHeight: 0,
rast: raster.NewRasterizer(glyphMaxSizePixels.W, glyphMaxSizePixels.H),
}
}
func newGlyphPage(face fnt.Face, r rune) *glyphPage {
// Start the page big enough to hold the initial rune.
b, _, _ := face.GlyphBounds(r)
bounds := rectangle26_6toRect(b)
size := math.Size{W: glyphPageWidth, H: glyphPageHeight}.Max(bounds.Size())
size.W = align(size.W, glyphSizeAlignment)
size.H = align(size.H, glyphSizeAlignment)
page := &glyphPage{
image: image.NewAlpha(image.Rect(0, 0, size.W, size.H)),
size: size,
entries: make(map[rune]glyphEntry),
rowHeight: 0,
}
page.add(face, r)
return page
}
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)
}
func (f *font) Layout(fl *gxui.TextBlock) (offsets []math.Point) {
sizeDips := math.Size{}
offsets = make([]math.Point, len(fl.Runes))
var offset math.Point
for i, r := range fl.Runes {
if r == '\n' {
offset.X = 0
offset.Y += f.glyphMaxSizeDips.H
continue
}
offsets[i] = offset
offset.X += f.advanceDips(r)
sizeDips = sizeDips.Max(math.Size{W: offset.X, H: offset.Y + f.glyphMaxSizeDips.H})
}
origin := f.align(fl.AlignRect, sizeDips, f.ascentDips, fl.H, fl.V)
for i, p := range offsets {
offsets[i] = p.Add(origin)
}
return offsets
}
func (l *ScrollLayout) SetScrollOffset(scrollOffset math.Point) bool {
var cs math.Size
if l.child != nil {
cs = l.child.Control.Size()
}
s := l.innerSize
scrollOffset = scrollOffset.Min(cs.Sub(s).Point()).Max(math.Point{})
l.scrollBarX.Control.SetVisible(l.canScrollX && cs.W > s.W)
l.scrollBarY.Control.SetVisible(l.canScrollY && cs.H > s.H)
l.scrollBarX.Control.(gxui.ScrollBar).SetScrollPosition(l.scrollOffset.X, l.scrollOffset.X+s.W)
l.scrollBarY.Control.(gxui.ScrollBar).SetScrollPosition(l.scrollOffset.Y, l.scrollOffset.Y+s.H)
if l.scrollOffset != scrollOffset {
l.scrollOffset = scrollOffset
l.Relayout()
return true
}
return false
}
func (l *LinearLayout) DesiredSize(min, max math.Size) math.Size {
if l.sizeMode.Fill() {
return max
}
bounds := min.Rect()
children := l.outer.Children()
horizontal := l.direction.Orientation().Horizontal()
offset := math.Point{X: 0, Y: 0}
for _, c := range children {
cs := c.Control.DesiredSize(math.ZeroSize, max)
cm := c.Control.Margin()
cb := cs.Expand(cm).Rect().Offset(offset)
if horizontal {
offset.X += cb.W()
} else {
offset.Y += cb.H()
}
bounds = bounds.Union(cb)
}
return bounds.Size().Expand(l.outer.Padding()).Clamp(min, max)
}
func (a *DefaultAdapter) SetSizeAsLargest(theme Theme) {
s := math.Size{}
font := theme.DefaultFont()
for i := 0; i < a.Count(); i++ {
switch t := a.ItemAt(i).(type) {
case Viewer:
s = s.Max(t.View(theme).DesiredSize(math.ZeroSize, math.MaxSize))
case Stringer:
s = s.Max(font.Measure(&TextBlock{
Runes: []rune(t.String()),
}))
default:
s = s.Max(font.Measure(&TextBlock{
Runes: []rune(fmt.Sprintf("%+v", t)),
}))
}
}
a.SetSize(s)
}
func (l *List) LayoutChildren() {
if l.adapter == nil {
l.outer.RemoveAll()
return
}
if !l.RelayoutSuspended() {
// Disable relayout on AddChild / RemoveChild as we're performing layout here.
l.SetRelayoutSuspended(true)
defer l.SetRelayoutSuspended(false)
}
s := l.outer.Size().Contract(l.Padding())
o := l.Padding().LT()
var itemSize math.Size
if l.orientation.Horizontal() {
itemSize = math.Size{W: l.itemSize.W, H: s.H}
} else {
itemSize = math.Size{W: s.W, H: l.itemSize.H}
}
startIndex, endIndex := l.VisibleItemRange(true)
majorAxisItemSize := l.MajorAxisItemSize()
d := startIndex*majorAxisItemSize - l.scrollOffset
mark := l.layoutMark
l.layoutMark++
for idx := startIndex; idx < endIndex; idx++ {
item := l.adapter.ItemAt(idx)
details, found := l.details[item]
if found {
if details.mark == mark {
panic(fmt.Errorf("Adapter for control '%s' returned duplicate item (%v) for indices %v and %v",
gxui.Path(l.outer), item, details.index, idx))
}
} else {
control := l.adapter.Create(l.theme, idx)
details.onClickSubscription = control.OnClick(func(ev gxui.MouseEvent) {
l.ItemClicked(ev, item)
})
details.child = l.AddChildAt(0, control)
}
details.mark = mark
details.index = idx
l.details[item] = details
c := details.child
cm := c.Control.Margin()
cs := itemSize.Contract(cm).Max(math.ZeroSize)
if l.orientation.Horizontal() {
c.Layout(math.CreateRect(d, cm.T, d+cs.W, cm.T+cs.H).Offset(o))
} else {
c.Layout(math.CreateRect(cm.L, d, cm.L+cs.W, d+cs.H).Offset(o))
}
d += majorAxisItemSize
}
// Reap unused items
for item, details := range l.details {
if details.mark != mark {
details.onClickSubscription.Unlisten()
l.RemoveChild(details.child.Control)
delete(l.details, item)
}
}
if l.scrollBarEnabled {
ss := l.scrollBar.DesiredSize(math.ZeroSize, s)
if l.Orientation().Horizontal() {
l.scrollBarChild.Layout(math.CreateRect(0, s.H-ss.H, s.W, s.H).Canon().Offset(o))
} else {
l.scrollBarChild.Layout(math.CreateRect(s.W-ss.W, 0, s.W, s.H).Canon().Offset(o))
}
// Only show the scroll bar if needed
entireContentVisible := startIndex == 0 && endIndex == l.itemCount
l.scrollBar.SetVisible(!entireContentVisible)
}
l.UpdateItemMouseOver()
}