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text rotation works, ish.

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This commit is contained in:
Will Charczuk 2016-10-21 12:44:37 -07:00
parent 53280b9258
commit f800bc387b
15 changed files with 281 additions and 131 deletions
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83
_examples/text_rotation/main.go
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@ -4,60 +4,47 @@ import (
"net/http"
"github.com/wcharczuk/go-chart"
"github.com/wcharczuk/go-chart/drawing"
)
func drawChart(res http.ResponseWriter, req *http.Request) {
/*
In this example we set a rotation on the style for the custom ticks from the `custom_ticks` example.
*/
f, _ := chart.GetDefaultFont()
r, _ := chart.PNG(1024, 1024)
graph := chart.Chart{
YAxis: chart.YAxis{
Style: chart.Style{
Show: true,
},
Range: &chart.ContinuousRange{
Min: 0.0,
Max: 4.0,
},
TickStyle: chart.Style{
TextRotationDegrees: 45.0,
},
Ticks: []chart.Tick{
{Value: 0.0, Label: "0.00"},
{Value: 2.0, Label: "2.00"},
{Value: 4.0, Label: "4.00"},
{Value: 6.0, Label: "6.00"},
{Value: 8.0, Label: "Eight"},
{Value: 10.0, Label: "Ten"},
},
},
XAxis: chart.XAxis{
Style: chart.Style{
Show: true,
},
TickStyle: chart.Style{
TextRotationDegrees: 45.0,
},
Ticks: []chart.Tick{
{Value: 0.0, Label: "0.00"},
{Value: 2.0, Label: "2.00"},
{Value: 4.0, Label: "4.00"},
{Value: 6.0, Label: "6.00"},
{Value: 8.0, Label: "Eight"},
{Value: 10.0, Label: "Ten"},
},
},
Series: []chart.Series{
chart.ContinuousSeries{
XValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
YValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
},
},
}
chart.Draw.Text(r, "Test", 64, 64, chart.Style{
FontColor: drawing.ColorBlack,
FontSize: 18,
Font: f,
})
chart.Draw.Text(r, "Test", 64, 64, chart.Style{
FontColor: drawing.ColorBlack,
FontSize: 18,
Font: f,
TextRotationDegrees: 45.0,
})
tb := chart.Draw.MeasureText(r, "Test", chart.Style{
FontColor: drawing.ColorBlack,
FontSize: 18,
Font: f,
}).Shift(64, 64)
tbc := tb.Corners().Rotate(45)
chart.Draw.BoxCorners(r, tbc, chart.Style{
StrokeColor: drawing.ColorRed,
StrokeWidth: 2,
})
tbcb := tbc.Box()
chart.Draw.Box(r, tbcb, chart.Style{
StrokeColor: drawing.ColorBlue,
StrokeWidth: 2,
})
res.Header().Set("Content-Type", "image/png")
graph.Render(chart.PNG, res)
r.Save(res)
}
func main() {