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ZacharyZhang-NY committed 2026-10-05 15:43:44 -04:00
1 parent 71bd0479d2
commit 48a32c1bec
112 files changed
+3607 -1241
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candlestick_chart.go
+42 -19
View File
@@ -12,7 +12,7 @@ import (
"mujicaui/theme"
)
// ChartType is how a price chart draws candles. The zero value is ChartCandles.
// ChartType selects the price chart shape.
type ChartType int
const (
@@ -31,26 +31,29 @@ type CandlestickOptions struct {
Decimals int
// Overlays draw indicators over the prices.
Overlays []IndicatorOverlay
// Compare overlays other symbols in percent; the chart turns to percent while any show.
// Compare switches the chart to normalized percent prices.
Compare *[]CompareSymbol
// Alerts are draggable price lines; OnAlert runs when the last close crosses one.
// Alerts provides draggable lines and price-crossing callbacks.
Alerts *[]PriceAlertLine
OnAlert func(a PriceAlertLine, last Candle)
// Drawings, when set, takes clicks for the current tool.
Drawings *DrawingTools
// Sync links the view and crosshair to other charts under SyncID.
// Sync links the window and crosshair under SyncID.
Sync *ChartSync
SyncID string
}
// mktState is a price chart's own frame-to-frame state.
type mktState struct {
drawn int // candles painted last frame
dragRest float32 // pan drag left over, under a candle
lastClose float64
alertSeen bool
grab int // alert index dragged, -1 none
focus int // keyboard mark last frame, to follow only when it moves
drawn int // candles painted last frame
dragRest float32 // pan drag left over, under a candle
lastClose float64
alertSeen bool
grab int // alert index dragged, -1 none
focus int // keyboard mark last frame, to follow only when it moves
alertFocus int
plot ui.Rect
ys internal.Linear // the price scale as last painted
}
// mktCore is one price chart being built.
@@ -77,7 +80,7 @@ type mktLine struct {
shape int
}
// CandlestickChart draws candles of the view's window, building and painting only those; rises and falls use the window's Trend colors and hollow or filled bodies.
// CandlestickChart paints visible candles with hollow rises and filled falls.
func CandlestickChart(c *ui.Context, candles []Candle, view *MarketView, opts CandlestickOptions) ChartResult {
if view == nil {
panic("mujica: CandlestickChart needs a view")
@@ -97,7 +100,14 @@ func CandlestickChart(c *ui.Context, candles []Candle, view *MarketView, opts Ca
return candles
})
m := &mktCore{c: c, k: Tokens(c), ch: ch, candles: shown, view: view, opts: opts, dec: priceDecimals("CandlestickChart", opts.Decimals)}
m.st = *ui.Local(ch.res.Element, "mujica.mkt", func() *mktState { return &mktState{grab: -1, focus: -1} })
m.st = *ui.Local(ch.res.Element, "mujica.mkt", func() *mktState { return &mktState{grab: -1, focus: -1, alertFocus: -1} })
if ch.res.Element.IsDisabled() {
copy := *view
view = &copy
m.view = view
m.opts.Sync = nil
opts.Sync = nil
}
if s := opts.Sync; s != nil {
s.load(opts.SyncID, shown, view)
}
@@ -122,7 +132,7 @@ func OHLCChart(c *ui.Context, candles []Candle, view *MarketView, opts Candlesti
return CandlestickChart(c, candles, view, opts)
}
// HeikinAshiChart is CandlestickChart of Heikin-Ashi candles computed from candles; *raw switches back to them.
// HeikinAshiChart switches between smoothed candles and raw OHLC.
func HeikinAshiChart(c *ui.Context, candles []Candle, view *MarketView, raw *bool, opts CandlestickOptions) ChartResult {
if raw == nil {
panic("mujica: HeikinAshiChart needs raw")
@@ -136,8 +146,8 @@ func HeikinAshiChart(c *ui.Context, candles []Candle, view *MarketView, raw *boo
col.Children(func() {
ui.Row(c).Children(func() {
v := []bool{*raw}
if ToggleGroup(c, &v, []ToggleItem[bool]{{Value: false, Label: msg(c, "heikin_ashi.smoothed")}, {Value: true, Label: msg(c, "heikin_ashi.raw")}},
ToggleGroupOptions{Label: msg(c, "heikin_ashi.switch")}).Changed() {
if ToggleGroup(c, &v, []ToggleItem[bool]{{Value: false, Label: msg(c, "heikin_ashi_chart.smoothed")}, {Value: true, Label: msg(c, "heikin_ashi_chart.raw")}},
ToggleGroupOptions{Label: msg(c, "heikin_ashi_chart.switch")}).Changed() {
*raw = v[0]
slog.Debug("mujica: heikin_ashi switch", "raw", *raw)
}
@@ -148,7 +158,7 @@ func HeikinAshiChart(c *ui.Context, candles []Candle, view *MarketView, raw *boo
return res
}
// window resolves the shown candles from the view and last frame's width.
// window resolves visible candles using the last measured width.
func (m *mktCore) window() {
m.from, m.to = marketWindow(*m.view, len(m.candles), m.room())
}
@@ -162,7 +172,7 @@ func (m *mktCore) room() int {
return max(10, int(w/3))
}
// yDomain spans the window's lows and highs, overlays and alerts, recomputed only when they change.
// yDomain caches visible prices, indicators, and alerts.
func (m *mktCore) yDomain() {
if m.to <= m.from {
return
@@ -195,7 +205,7 @@ func (m *mktCore) yDomain() {
m.lo, m.hi = d[0], d[1]
}
// val maps a price to what the axis shows: itself, or percent from base.
// val converts price to the current axis unit.
func (m *mktCore) val(p float64) float64 {
if m.base == 0 {
return p
@@ -238,6 +248,12 @@ func (m *mktCore) spec() chartSpec {
for _, l := range m.overlays {
keys = append(keys, chartKey{Name: l.name, Color: l.color, Shape: l.shape})
}
if n == 0 && m.opts.Compare != nil {
pal := internal.Palette(m.k)
for i, s := range *m.opts.Compare {
keys = append(keys, chartKey{Name: s.Name, Color: pal[(i+1)%len(pal)], Shape: i + 1})
}
}
spec := chartSpec{n: n, keys: keys}
if m.to <= m.from {
spec.n = 0
@@ -256,12 +272,19 @@ func (m *mktCore) spec() chartSpec {
}
return min(i+1, n-1)
}
if d := m.opts.Drawings; d != nil {
spec.keyActivate = func(i int) {
if !d.Locked && d.Tool != ToolSelect {
d.place(m, DrawingPoint{m.candles[i].Time, m.candles[i].Close})
}
}
}
spec.readout = m.readout
spec.draw = func(p *ui.Painter, r ui.Rect, active int) { m.paint(p, r, active) }
return spec
}
// readout says the candle's time, prices, change and direction, and the overlays there.
// readout describes time, OHLC, volume, direction, and indicators.
func (m *mktCore) readout(i int) string {
c := m.candles[i]
f := func(v float64) string { return priceUngrouped(v, m.dec) }