zeni/go-charts
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feat: support customize title

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This commit is contained in:
vicanso 2021-12-29 23:18:41 +08:00
parent 2772798122
commit 06c326bdc3
9 changed files with 170 additions and 44 deletions
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20
legend.go
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@ -83,8 +83,8 @@ func covertPercent(value string) float64 {
return float64(v) / 100
}
func getLegendLeft(width, legendBoxWidth int, opt LegendOption) int {
left := (width - legendBoxWidth) / 2
func getLegendLeft(canvasWidth, legendBoxWidth int, opt LegendOption) int {
left := (canvasWidth - legendBoxWidth) / 2
leftValue := opt.Left
if leftValue == "auto" || leftValue == "center" {
leftValue = ""
@ -106,7 +106,7 @@ func getLegendLeft(width, legendBoxWidth int, opt LegendOption) int {
if leftValue != "" {
percent := covertPercent(leftValue)
if percent >= 0 {
return int(float64(width) * percent)
return int(float64(canvasWidth) * percent)
}
v, _ := strconv.Atoi(leftValue)
return v
@ -114,10 +114,10 @@ func getLegendLeft(width, legendBoxWidth int, opt LegendOption) int {
if rightValue != "" {
percent := covertPercent(rightValue)
if percent >= 0 {
return width - legendBoxWidth - int(float64(width)*percent)
return canvasWidth - legendBoxWidth - int(float64(canvasWidth)*percent)
}
v, _ := strconv.Atoi(rightValue)
return width - legendBoxWidth - v
return canvasWidth - legendBoxWidth - v
}
return left
}
@ -127,7 +127,7 @@ func getLegendTop(height, legendBoxHeight int, opt LegendOption) int {
return 0
}
func LegendCustomize(series []chart.Series, opt LegendOption) chart.Renderable {
func NewLegendCustomize(series []chart.Series, opt LegendOption) chart.Renderable {
return func(r chart.Renderer, cb chart.Box, chartDefaults chart.Style) {
legendDefaults := chart.Style{
FontColor: getTextColor(opt.Theme),
@ -154,7 +154,6 @@ func LegendCustomize(series []chart.Series, opt LegendOption) chart.Renderable {
}
var textHeight int
var textWidth int
var textBox chart.Box
labelWidth := 0
// 计算文本宽度与高度（取最大值）
@ -163,7 +162,6 @@ func LegendCustomize(series []chart.Series, opt LegendOption) chart.Renderable {
textBox = r.MeasureText(labels[x])
labelWidth += textBox.Width()
textHeight = chart.MaxInt(textBox.Height(), textHeight)
textWidth = chart.MaxInt(textBox.Width(), textWidth)
}
}
@ -175,15 +173,15 @@ func LegendCustomize(series []chart.Series, opt LegendOption) chart.Renderable {
lineTextGap := 5
iconAllWidth := iconWidth * len(labels)
spaceAllWidth := chart.DefaultMinimumTickHorizontalSpacing * (len(labels) - 1)
spaceAllWidth := (chart.DefaultMinimumTickHorizontalSpacing + lineTextGap) * (len(labels) - 1)
legendBoxWidth := labelWidth + iconAllWidth + spaceAllWidth
left := getLegendLeft(cb.Width(), legendBoxWidth, opt)
top := getLegendTop(cb.Height(), legendBoxHeight, opt)
left += opt.Padding.Left
top += opt.Padding.Top
left += (opt.Padding.Left + cb.Left)
top += (opt.Padding.Top + cb.Top)
legendBox := chart.Box{
Left: left,