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custom padding example and slight fixes.

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This commit is contained in:
Will Charczuk 2016-07-17 12:52:26 -07:00
parent 0e3d2e9c1f
commit ae31a618df
2 changed files with 44 additions and 15 deletions
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29
chart.go
View file

@ -253,17 +253,7 @@ func (c Chart) checkRanges(xr, yr, yra Range) error {
}
func (c Chart) getDefaultCanvasBox() Box {
dpt := c.Background.Padding.GetTop(DefaultBackgroundPadding.Top)
dpl := c.Background.Padding.GetLeft(DefaultBackgroundPadding.Left)
dpr := c.Background.Padding.GetRight(DefaultBackgroundPadding.Right)
dpb := c.Background.Padding.GetBottom(DefaultBackgroundPadding.Bottom)
return Box{
Top: dpt,
Left: dpl,
Right: c.GetWidth() - dpr,
Bottom: c.GetHeight() - dpb,
}
return c.Box()
}
func (c Chart) getValueFormatters() (x, y, ya ValueFormatter) {
@ -323,7 +313,7 @@ func (c Chart) getAxisAdjustedCanvasBox(r Renderer, canvasBox Box, xr, yr, yra R
axesOuterBox = axesOuterBox.Grow(axesBounds)
}
return canvasBox.OuterConstrain(canvasBox, axesOuterBox)
return canvasBox.OuterConstrain(c.Box(), axesOuterBox)
}
func (c Chart) setRangeDomains(canvasBox Box, xr, yr, yra Range) (xr2, yr2, yra2 Range) {
@ -382,7 +372,10 @@ func (c Chart) getBackgroundStyle() Style {
}
func (c Chart) drawBackground(r Renderer) {
DrawBox(r, c.Box(), c.getBackgroundStyle())
DrawBox(r, Box{
Right: c.GetWidth(),
Bottom: c.GetHeight(),
}, c.getBackgroundStyle())
}
func (c Chart) getCanvasStyle() Style {
@ -477,5 +470,13 @@ func (c Chart) styleDefaultsElements() Style {
// Box returns the chart bounds as a box.
func (c Chart) Box() Box {
return Box{Right: c.GetWidth(), Bottom: c.GetHeight()}
dpr := c.Background.Padding.GetRight(DefaultBackgroundPadding.Right)
dpb := c.Background.Padding.GetBottom(DefaultBackgroundPadding.Bottom)
return Box{
Top: c.Background.Padding.GetTop(DefaultBackgroundPadding.Top),
Left: c.Background.Padding.GetLeft(DefaultBackgroundPadding.Left),
Right: c.GetWidth() - dpr,
Bottom: c.GetHeight() - dpb,
}
}

30
examples/custom_padding/main.go
View file

@ -11,7 +11,7 @@ func drawChart(res http.ResponseWriter, req *http.Request) {
graph := chart.Chart{
Background: chart.Style{
Padding: chart.Box{
Top: 10,
Top: 50,
Left: 25,
Right: 25,
Bottom: 10,
@ -40,7 +40,35 @@ func drawChart(res http.ResponseWriter, req *http.Request) {
graph.Render(chart.PNG, res)
}
func drawChartDefault(res http.ResponseWriter, req *http.Request) {
graph := chart.Chart{
Background: chart.Style{
FillColor: drawing.ColorFromHex("efefef"),
},
XAxis: chart.XAxis{
Style: chart.Style{
Show: true,
},
},
YAxis: chart.YAxis{
Style: chart.Style{
Show: true,
},
},
Series: []chart.Series{
chart.ContinuousSeries{
XValues: chart.Seq(1.0, 100.0),
YValues: chart.SeqRand(100.0, 256.0),
},
},
}
res.Header().Set("Content-Type", "image/png")
graph.Render(chart.PNG, res)
}
func main() {
http.HandleFunc("/", drawChart)
http.HandleFunc("/default", drawChartDefault)
http.ListenAndServe(":8080", nil)
}