func (l *ScrollLayout) LayoutChildren() {
s := l.outer.Size().Contract(l.Padding())
o := l.Padding().LT()
var sxs, sys math.Size
if l.canScrollX {
sxs = l.scrollBarX.Control.DesiredSize(math.ZeroSize, s)
}
if l.canScrollY {
sys = l.scrollBarY.Control.DesiredSize(math.ZeroSize, s)
}
l.scrollBarX.Layout(math.CreateRect(0, s.H-sxs.H, s.W-sys.W, s.H).Canon().Offset(o))
l.scrollBarY.Layout(math.CreateRect(s.W-sys.W, 0, s.W, s.H-sxs.H).Canon().Offset(o))
l.innerSize = s.Contract(math.Spacing{R: sys.W, B: sxs.H})
if l.child != nil {
max := l.innerSize
if l.canScrollX {
max.W = math.MaxSize.W
}
if l.canScrollY {
max.H = math.MaxSize.H
}
cs := l.child.Control.DesiredSize(math.ZeroSize, max)
l.child.Layout(cs.Rect().Offset(l.scrollOffset.Neg()).Offset(o))
l.scrollBarX.Control.(gxui.ScrollBar).SetScrollLimit(cs.W)
l.scrollBarY.Control.(gxui.ScrollBar).SetScrollLimit(cs.H)
}
l.SetScrollOffset(l.scrollOffset)
}
func (t *PanelTab) Paint(c gxui.Canvas) {
s := t.Size()
var style Style
switch {
case t.IsMouseDown(gxui.MouseButtonLeft) && t.IsMouseOver():
style = t.theme.TabPressedStyle
case t.IsMouseOver():
style = t.theme.TabOverStyle
default:
style = t.theme.TabDefaultStyle
}
if l := t.Label(); l != nil {
l.SetColor(style.FontColor)
}
c.DrawRoundedRect(s.Rect(), 5.0, 5.0, 0.0, 0.0, style.Pen, style.Brush)
if t.HasFocus() {
style = t.theme.FocusedStyle
r := math.CreateRect(1, 1, s.W-1, s.H-1)
c.DrawRoundedRect(r, 4.0, 4.0, 0.0, 0.0, style.Pen, style.Brush)
}
if t.active {
style = t.theme.TabActiveHighlightStyle
r := math.CreateRect(1, s.H-1, s.W-1, s.H)
c.DrawRect(r, style.Brush)
}
t.Button.Paint(c)
}
func (l *SplitterLayout) LayoutChildren() {
s := l.outer.Size().Contract(l.Padding())
o := l.Padding().LT()
children := l.outer.Children()
splitterCount := len(children) / 2
splitterWidth := l.splitterWidth
if l.orientation.Horizontal() {
s.W -= splitterWidth * splitterCount
} else {
s.H -= splitterWidth * splitterCount
}
netWeight := float32(0.0)
for i, c := range children {
if isSplitter := (i & 1) == 1; !isSplitter {
netWeight += l.weights[c.Control]
}
}
d := 0
for i, c := range children {
var cr math.Rect
if isSplitter := (i & 1) == 1; !isSplitter {
cm := c.Control.Margin()
frac := l.weights[c.Control] / netWeight
if l.orientation.Horizontal() {
cw := int(float32(s.W) * frac)
cr = math.CreateRect(d+cm.L, cm.T, d+cw-cm.R, s.H-cm.B)
d += cw
} else {
ch := int(float32(s.H) * frac)
cr = math.CreateRect(cm.L, d+cm.T, s.W-cm.R, d+ch-cm.B)
d += ch
}
} else {
if l.orientation.Horizontal() {
cr = math.CreateRect(d, 0, d+splitterWidth, s.H)
} else {
cr = math.CreateRect(0, d, s.W, d+splitterWidth)
}
d += splitterWidth
}
c.Layout(cr.Offset(o).Canon())
}
}
func (l *CodeEditorLine) PaintBorders(c gxui.Canvas, info CodeEditorLinePaintInfo) {
start, _ := info.LineSpan.Span()
offsets := info.GlyphOffsets
for _, layer := range l.ce.layers {
if layer != nil && layer.BorderColor() != nil {
color := *layer.BorderColor()
interval.Visit(layer.Spans(), info.LineSpan, func(vs, ve uint64, _ int) {
s, e := vs-start, ve-start
r := math.CreateRect(offsets[s].X, 0, offsets[e-1].X+info.GlyphWidth, info.LineHeight)
c.DrawRoundedRect(r, 3, 3, 3, 3, gxui.CreatePen(0.5, color), gxui.TransparentBrush)
})
}
}
}
func (t *TextBox) LayoutChildren() {
t.List.LayoutChildren()
if t.scrollBarEnabled {
size := t.Size().Contract(t.Padding())
scrollAreaSize := size
scrollAreaSize.W -= t.scrollBar.Size().W
offset := t.Padding().LT()
barSize := t.horizScroll.DesiredSize(math.ZeroSize, scrollAreaSize)
t.horizScrollChild.Layout(math.CreateRect(0, size.H-barSize.H, scrollAreaSize.W, size.H).Canon().Offset(offset))
maxLineWidth := t.outer.MaxLineWidth()
entireContentVisible := size.W > maxLineWidth
t.horizScroll.SetVisible(!entireContentVisible)
}
}
func (p *PanelHolder) LayoutChildren() {
s := p.Size()
tabHeight := p.tabLayout.DesiredSize(math.ZeroSize, s).H
panelRect := math.CreateRect(0, tabHeight, s.W, s.H).Contract(p.Padding())
for _, child := range p.Children() {
if child.Control == p.tabLayout {
child.Control.SetSize(math.Size{W: s.W, H: tabHeight})
child.Offset = math.ZeroPoint
} else {
rect := panelRect.Contract(child.Control.Margin())
child.Control.SetSize(rect.Size())
child.Offset = rect.Min
}
}
}
func (l *CodeEditorLine) PaintBackgroundSpans(c gxui.Canvas, info CodeEditorLinePaintInfo) {
start, _ := info.LineSpan.Span()
offsets := info.GlyphOffsets
remaining := interval.IntDataList{info.LineSpan}
for _, layer := range l.ce.layers {
if layer != nil && layer.BackgroundColor() != nil {
color := *layer.BackgroundColor()
for _, span := range layer.Spans().Overlaps(info.LineSpan) {
interval.Visit(&remaining, span, func(vs, ve uint64, _ int) {
s, e := vs-start, ve-start
r := math.CreateRect(offsets[s].X, 0, offsets[e-1].X+info.GlyphWidth, info.LineHeight)
c.DrawRoundedRect(r, 3, 3, 3, 3, gxui.TransparentPen, gxui.Brush{Color: color})
})
interval.Remove(&remaining, span)
}
}
}
}
func (l *TableLayout) LayoutChildren() {
s := l.outer.Size().Contract(l.outer.Padding())
o := l.outer.Padding().LT()
cw, ch := s.W/l.columns, s.H/l.rows
var cr math.Rect
for _, c := range l.outer.Children() {
cm := c.Control.Margin()
cell := l.grid[c.Control]
x, y := cell.x*cw, cell.y*ch
w, h := x+cell.w*cw, y+cell.h*ch
cr = math.CreateRect(x+cm.L, y+cm.T, w-cm.R, h-cm.B)
c.Layout(cr.Offset(o).Canon())
}
}
func (p *glyphPage) add(face fnt.Face, r rune) bool {
if _, found := p.entries[r]; found {
panic("Glyph already added to glyph page")
}
b, mask, maskp, _, _ := face.Glyph(fixed.Point26_6{}, r)
bounds := math.CreateRect(b.Min.X, b.Min.Y, b.Max.X, b.Max.Y)
w, h := bounds.Size().WH()
x, y := p.nextPoint.X, p.nextPoint.Y
if x+w > p.size.W {
// Row full, start new line
x = 0
y += p.rowHeight + glyphPadding
p.rowHeight = 0
}
if y+h > p.size.H {
return false // Page full
}
draw.Draw(p.image, image.Rect(x, y, x+w, y+h), mask, maskp, draw.Src)
p.entries[r] = glyphEntry{
offset: math.Point{X: x, Y: y}.Sub(bounds.Min),
bounds: bounds,
}
p.nextPoint = math.Point{X: x + w + glyphPadding, Y: y}
if h > p.rowHeight {
p.rowHeight = h
}
p.tex = nil
return true
}
func (v *viewport) drawFrameUpdate(ctx *context) {
dx := (ctx.stats.frameCount * 10) & 0xFF
r := math.CreateRect(dx-5, 0, dx+5, 3)
ds := &drawState{}
ctx.blitter.blitRect(ctx, r, gxui.White, ds)
}
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()
}