74 lines
1.7 KiB
Go
74 lines
1.7 KiB
Go
package chart
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import (
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"github.com/wcharczuk/go-chart/drawing"
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)
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// DetailsBox adds a box with additional text
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func DetailsBox(c *Chart, text []string, userDefaults ...Style) Renderable {
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return func(r Renderer, box Box, chartDefaults Style) {
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// default style
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defaults := Style{
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FillColor: drawing.ColorWhite,
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FontColor: DefaultTextColor,
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FontSize: 8.0,
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StrokeColor: DefaultAxisColor,
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StrokeWidth: DefaultAxisLineWidth,
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}
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var style Style
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if len(userDefaults) > 0 {
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style = userDefaults[0].InheritFrom(chartDefaults.InheritFrom(defaults))
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} else {
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style = chartDefaults.InheritFrom(defaults)
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}
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contentPadding := Box{
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Top: box.Height(),
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Left: 5,
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Right: 5,
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Bottom: box.Height(),
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}
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contentBox := Box{
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Bottom: box.Height(),
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Left: 5,
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}
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content := Box{
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Top: contentBox.Bottom - 5,
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Left: contentBox.Left + contentPadding.Left,
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Right: contentBox.Left + contentPadding.Left,
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Bottom: contentBox.Bottom - 5,
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}
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style.GetTextOptions().WriteToRenderer(r)
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// measure and add size of text to box height and width
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for _, t := range text {
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textbox := r.MeasureText(t)
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content.Top -= textbox.Height()
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right := content.Left + textbox.Width()
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content.Right = MaxInt(content.Right, right)
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}
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contentBox = contentBox.Grow(content)
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contentBox.Right = content.Right + contentPadding.Right
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contentBox.Top = content.Top - 5
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// draw the box
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Draw.Box(r, contentBox, style)
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style.GetTextOptions().WriteToRenderer(r)
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// add the text
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ycursor := content.Top
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x := content.Left
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for _, t := range text {
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textbox := r.MeasureText(t)
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y := ycursor + textbox.Height()
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r.Text(t, x, y)
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ycursor += textbox.Height()
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}
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}
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}
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