Area Chart
查看源码components/chart_area.go渐变面积#
单序列、平滑曲线和从序列色渐隐的填充。
chart := components.AreaChart{
Series: []components.ChartSeries{{Key: "desktop", Label: "Desktop", Color: theme.Chart[0]}},
Values: [][]float32{desktop},
Curve: components.ChartCurveMonotone,
XAxis: components.ChartAxis{Format: formatMonth},
Grid: components.ChartGridHorizontal,
}
plot := components.PaintAreaChart(canvas, theme, bounds, chartID, chart, &state)折线与数据点#
无填充的折线图,标出每个数据点。
chart := components.AreaChart{
Series: series, Values: values,
Fill: components.ChartFillNone,
Dots: true,
XAxis: components.ChartAxis{Format: formatMonth},
Grid: components.ChartGridBoth,
Legend: components.ChartLegendBottom,
}
components.PaintAreaChart(canvas, theme, bounds, chartID, chart, &state)阶梯曲线#
每个值保持到相邻两点的中点。
chart := components.AreaChart{
Series: series, Values: values,
Curve: components.ChartCurveStep,
Fill: components.ChartFillSolid,
XAxis: components.ChartAxis{Format: formatMonth},
}
components.PaintAreaChart(canvas, theme, bounds, chartID, chart, &state)堆叠#
按序列顺序自下而上堆叠,纵轴随总量缩放。
chart := components.AreaChart{
Series: series, Values: values,
Curve: components.ChartCurveNatural,
Stack: components.ChartStackStacked,
XAxis: components.ChartAxis{Format: formatMonth},
Grid: components.ChartGridHorizontal,
Legend: components.ChartLegendBottom,
}
components.PaintAreaChart(canvas, theme, bounds, chartID, chart, &state)百分比堆叠#
每个横坐标归一到 100%,纵轴以百分比标注。
chart := components.AreaChart{
Series: series, Values: values,
Stack: components.ChartStackExpand,
XAxis: components.ChartAxis{Format: formatMonth},
Grid: components.ChartGridHorizontal,
}
components.PaintAreaChart(canvas, theme, bounds, chartID, chart, &state)悬停与键盘#
指针或方向键移动悬停点,提示框按边缘自动翻转。
plot := components.PaintAreaChart(canvas, theme, bounds, chartID, chart, &state)
// From the pointer: state.Hover(plot.IndexAt(event.X)), and state.Clear() on exit.
// From the keyboard:
if index, ok := components.ChartStepForKey(event.Key, current, plot.Count()); ok {
state.Hover(index)
}安装
将组件源码复制到自己的项目,直接修改。
go run ./cmd/viva add --out ./components/local chart-area源码组件用法#
此预览直接调用生产 Go 组件。稳定 ID、值与打开状态仍由应用持有;组件只负责绘制并声明交互语义。
- 标题旁的源码链接列出了全部选项与视觉决策。
- 请使用原生命令验证系统文本、焦点、无障碍与平台集成。
- 浏览器预览验证共享布局和场景行为,不代表原生性能。
验证边界#
示例覆盖当前 API 的代表性状态,但不表示每个桌面后端都已完成真机验证。
键盘操作
Tab 在控件间移动;Ctrl/⌘ K 搜索组件。进入预览后,键盘事件由 Go 运行时处理。