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can rotate text + add y axis names

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This commit is contained in:
Will Charczuk 2016-08-06 21:59:46 -07:00
parent 3607d732d9
commit 718678b421
34 changed files with 102 additions and 20 deletions
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19
vector_renderer.go
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@ -32,6 +32,7 @@ type vectorRenderer struct {
b *bytes.Buffer
c *canvas
s *Style
r float64
p []string
fc *font.Drawer
}
@ -171,6 +172,16 @@ func (vr *vectorRenderer) MeasureText(body string) (box Box) {
return
}
// SetTextRotation sets the text rotation.
func (vr *vectorRenderer) SetTextRotation(radians float64) {
vr.c.r = radians
}
// ClearTextRotation clears the text rotation.
func (vr *vectorRenderer) ClearTextRotation() {
vr.c.r = 0
}
// Save saves the renderer's contents to a writer.
func (vr *vectorRenderer) Save(w io.Writer) error {
vr.c.End()
@ -187,6 +198,7 @@ func newCanvas(w io.Writer) *canvas {
type canvas struct {
w io.Writer
dpi float64
r float64
width int
height int
}
@ -206,7 +218,12 @@ func (c *canvas) Path(d string, style Style) {
}
func (c *canvas) Text(x, y int, body string, style Style) {
c.w.Write([]byte(fmt.Sprintf(`<text x="%d" y="%d" style="%s">%s</text>`, x, y, c.styleAsSVG(style), body)))
if c.r == 0 {
c.w.Write([]byte(fmt.Sprintf(`<text x="%d" y="%d" style="%s">%s</text>`, x, y, c.styleAsSVG(style), body)))
} else {
transform := fmt.Sprintf(` transform="rotate(%0.2f,%d,%d)"`, Math.RadiansToDegrees(c.r), x, y)
c.w.Write([]byte(fmt.Sprintf(`<text x="%d" y="%d" style="%s"%s>%s</text>`, x, y, c.styleAsSVG(style), transform, body)))
}
}
func (c *canvas) Circle(x, y, r int, style Style) {