WIP components (as built)
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# 190 IndexCard
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## 用途
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指数卡片。
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## 最小示例
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```go
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quote := mujica.IndexQuote{Name: "S&P 500", Price: 5751.07, Change: 51.13, ChangePercent: 0.9, Series: []float64{5700, 5730, 5720, 5751}}
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view := func(c *ui.Context) {
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mujica.Use(c, mujica.Settings{})
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r := mujica.IndexCard(c, quote, mujica.IndexCardOptions{Clickable: true})
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if r.Changed() {
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fmt.Println(quote.Name)
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}
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}
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ui.Render(view, 960, 440, 1)
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```
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## 参数
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`q.Name` 必填;Price、Change、ChangePercent 和 Series 来自调用方。`Decimals` 默认 2;`Clickable/Disabled` 默认 false。
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## 状态
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默认;交互区域支持聚焦与选中,Disabled 参数控制禁用。
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## 事件
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if r.Changed() { 调用方回调(quote.Name) }
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## 键盘操作
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Tab 聚焦卡片或迷你图;Enter/Space 激活卡片,图表方向键读数。
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## 限制
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迷你图复用 Sparkline;行情获取由调用方负责。
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