add web server sample

README.md

@@ -1,7 +1,7 @@
 go-chart
 ========
 
-This project starts from a full copy from [https://github.com/wcharczuk/go-chart](https://github.com/wcharczuk/go-chart). 28 Oct 2024.
+This project starts from a full copy from [https://git.smarteching.com/zeni/go-chart](https://git.smarteching.com/zeni/go-chart). 28 Oct 2024.
 
 -
 
@@ -12,7 +12,7 @@ Master should now be on the v3.x codebase, which overhauls the api significantly
 To install `chart` run the following:
 
 ```bash
-> go get github.com/wcharczuk/go-chart/v2@latest
+> go get git.smarteching.com/zeni/go-chart/v2@latest
 ```
 
 Most of the components are interchangeable so feel free to crib whatever you want.
@@ -21,27 +21,27 @@ Most of the components are interchangeable so feel free to crib whatever you wan
 
 Spark Lines:
 
-![](https://raw.githubusercontent.com/wcharczuk/go-chart/master/_images/tvix_ltm.png)
+![](https://git.smarteching.com/zeni/go-chart/raw/branch/main/_images/tvix_ltm.png)
 
 Single axis:
 
-![](https://raw.githubusercontent.com/wcharczuk/go-chart/master/_images/goog_ltm.png)
+![](https://git.smarteching.com/zeni/go-chart/raw/branch/main/_images/goog_ltm.png)
 
 Two axis:
 
-![](https://raw.githubusercontent.com/wcharczuk/go-chart/master/_images/two_axis.png)
+![](https://git.smarteching.com/zeni/go-chart/raw/branch/main/_images/two_axis.png)
 
 # Other Chart Types
 
 Pie Chart:
 
-![](https://raw.githubusercontent.com/wcharczuk/go-chart/master/_images/pie_chart.png)
+![](https://git.smarteching.com/zeni/go-chart/raw/branch/main/_images/pie_chart.png)
 
 The code for this chart can be found in `examples/pie_chart/main.go`.
 
 Stacked Bar:
 
-![](https://raw.githubusercontent.com/wcharczuk/go-chart/master/_images/stacked_bar.png)
+![](https://git.smarteching.com/zeni/go-chart/raw/branch/main/_images/stacked_bar.png)
 
 The code for this chart can be found in `examples/stacked_bar/main.go`.
 
@@ -49,6 +49,8 @@ The code for this chart can be found in `examples/stacked_bar/main.go`.
 
 Actual chart configurations and examples can be found in the `./examples/` directory. They are simple CLI programs that write to `output.png` (they are also updated with `go generate`.
 
+If folder ends in "web", has web servers, so start them with `go run main.go` then access `http://localhost:8080` to see the output.
+
 # Usage
 
 Everything starts with the `chart.Chart` object. The bare minimum to draw a chart would be the following:
@@ -59,7 +61,7 @@ import (
     ...
     "bytes"
     ...
-    "github.com/wcharczuk/go-chart/v2" //exposes "chart"
+    "git.smarteching.com/zeni/go-chart/v2" //exposes "chart"
 )
 
 graph := chart.Chart{

examples/bar_chart_web/main.go

@@ -0,0 +1,55 @@
+package main
+
+//go:generate go run main.go
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+
+	"git.smarteching.com/zeni/go-chart/v2"
+)
+
+func drawChart(res http.ResponseWriter, req *http.Request) {
+	graph := chart.BarChart{
+		Title: "Test Bar Chart",
+		Background: chart.Style{
+			Padding: chart.Box{
+				Top: 40,
+			},
+		},
+		Height:   512,
+		BarWidth: 60,
+		Bars: []chart.Value{
+			{Value: 5.25, Label: "Blue"},
+			{Value: 4.88, Label: "Green"},
+			{Value: 4.74, Label: "Gray"},
+			{Value: 3.22, Label: "Orange"},
+			{Value: 3, Label: "Test"},
+			{Value: 2.27, Label: "??"},
+			{Value: 1, Label: "!!"},
+		},
+	}
+
+	res.Header().Set("Content-Type", "image/png")
+	err := graph.Render(chart.PNG, res)
+	if err != nil {
+		fmt.Printf("Error rendering chart: %v\n", err)
+	}
+
+}
+
+func port() string {
+	if len(os.Getenv("PORT")) > 0 {
+		return os.Getenv("PORT")
+	}
+	return "8080"
+}
+
+func main() {
+	listenPort := fmt.Sprintf(":%s", port())
+	fmt.Printf("Listening on %s\n", listenPort)
+	http.HandleFunc("/", drawChart)
+	log.Fatal(http.ListenAndServe(listenPort, nil))
+}

examples/pie_chart/main.go

@@ -5,7 +5,7 @@ package main
 import (
 	"os"
 
-	"git.smarteching.com/zeni/go-chart"
+	"git.smarteching.com/zeni/go-chart/v2"
 )
 
 func main() {
@@ -13,11 +13,11 @@ func main() {
 		Width:  512,
 		Height: 512,
 		Values: []chart.Value{
-			{Value: 5, Label: "Blues"},
+			{Value: 5, Label: "Blue"},
-			{Value: 5, Label: "Greens"},
+			{Value: 5, Label: "Green"},
-			{Value: 4, Label: "Grays"},
+			{Value: 4, Label: "Gray"},
-			{Value: 4, Label: "Oranges"},
+			{Value: 4, Label: "Orange"},
-			{Value: 3, Label: "Deep Blues"},
+			{Value: 3, Label: "Deep Blue"},
 			{Value: 3, Label: "??"},
 			{Value: 1, Label: "!!"},
 		},

examples/pie_chart_web/main.go

@@ -0,0 +1,55 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+
+	"git.smarteching.com/zeni/go-chart/v2"
+)
+
+func drawChart(res http.ResponseWriter, req *http.Request) {
+	pie := chart.PieChart{
+		Width:  512,
+		Height: 512,
+		Values: []chart.Value{
+			{Value: 5, Label: "Blue"},
+			{Value: 5, Label: "Green"},
+			{Value: 4, Label: "Gray"},
+			{Value: 4, Label: "Orange"},
+			{Value: 3, Label: "Deep Blue"},
+			{Value: 3, Label: "??"},
+			{Value: 1, Label: "!!"},
+		},
+	}
+
+	res.Header().Set("Content-Type", "image/png")
+	err := pie.Render(chart.PNG, res)
+	if err != nil {
+		fmt.Printf("Error rendering pie chart: %v\n", err)
+	}
+}
+
+func drawChartRegression(res http.ResponseWriter, req *http.Request) {
+	pie := chart.PieChart{
+		Width:  512,
+		Height: 512,
+		Values: []chart.Value{
+			{Value: 5, Label: "Blue"},
+			{Value: 2, Label: "Two"},
+			{Value: 1, Label: "One"},
+		},
+	}
+
+	res.Header().Set("Content-Type", chart.ContentTypeSVG)
+	err := pie.Render(chart.SVG, res)
+	if err != nil {
+		fmt.Printf("Error rendering pie chart: %v\n", err)
+	}
+}
+
+func main() {
+	http.HandleFunc("/", drawChart)
+	http.HandleFunc("/reg", drawChartRegression)
+	log.Fatal(http.ListenAndServe(":8080", nil))
+}

go.mod

@@ -1,8 +1,8 @@
-module github.com/wcharczuk/go-chart/v2
+module git.smarteching.com/zeni/go-chart/v2
 
-go 1.15
+go 1.23.1
 
 require (
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0
-	golang.org/x/image v0.18.0
+	golang.org/x/image v0.21.0
 )

go.sum

@@ -1,64 +1,4 @@
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 h1:DACJavvAHhabrF08vX0COfcOBJRhZ8lUbR+ZWIs0Y5g=
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0/go.mod h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k=
-github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+golang.org/x/image v0.21.0 h1:c5qV36ajHpdj4Qi0GnE0jUc/yuo33OLFaa0d+crTD5s=
-github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
+golang.org/x/image v0.21.0/go.mod h1:vUbsLavqK/W303ZroQQVKQ+Af3Yl6Uz1Ppu5J/cLz78=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
-golang.org/x/crypto v0.13.0/go.mod h1:y6Z2r+Rw4iayiXXAIxJIDAJ1zMW4yaTpebo8fPOliYc=
-golang.org/x/crypto v0.19.0/go.mod h1:Iy9bg/ha4yyC70EfRS8jz+B6ybOBKMaSxLj6P6oBDfU=
-golang.org/x/crypto v0.23.0/go.mod h1:CKFgDieR+mRhux2Lsu27y0fO304Db0wZe70UKqHu0v8=
-golang.org/x/image v0.18.0 h1:jGzIakQa/ZXI1I0Fxvaa9W7yP25TqT6cHIHn+6CqvSQ=
-golang.org/x/image v0.18.0/go.mod h1:4yyo5vMFQjVjUcVk4jEQcU9MGy/rulF5WvUILseCM2E=
-golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
-golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
-golang.org/x/mod v0.12.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
-golang.org/x/mod v0.15.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
-golang.org/x/mod v0.17.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
-golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
-golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
-golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
-golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
-golang.org/x/net v0.15.0/go.mod h1:idbUs1IY1+zTqbi8yxTbhexhEEk5ur9LInksu6HrEpk=
-golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
-golang.org/x/net v0.25.0/go.mod h1:JkAGAh7GEvH74S6FOH42FLoXpXbE/aqXSrIQjXgsiwM=
-golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
-golang.org/x/sync v0.6.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
-golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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-golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
-golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
-golang.org/x/term v0.8.0/go.mod h1:xPskH00ivmX89bAKVGSKKtLOWNx2+17Eiy94tnKShWo=
-golang.org/x/term v0.12.0/go.mod h1:owVbMEjm3cBLCHdkQu9b1opXd4ETQWc3BhuQGKgXgvU=
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-golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
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-golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
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-golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=