Built Graph Widget, working with basic sample

bargraph/widget.go

@@ -0,0 +1,95 @@
+package bargraph
+
+import (
+	"fmt"
+	"math/rand"
+	"time"
+
+	"github.com/olebedev/config"
+	"github.com/senorprogrammer/wtf/wtf"
+)
+
+// Config is a pointer to the global config object
+var Config *config.Config
+
+var started = false
+var ok = true
+
+// Widget define wtf widget to register widget later
+type Widget struct {
+	wtf.GraphWidget
+
+	// time interval for send http request
+	updateInterval int
+}
+
+// NewWidget Make new instance of widget
+func NewWidget() *Widget {
+	widget := Widget{
+		GraphWidget: wtf.NewGraphWidget(" Bar Graph", "bargraph", false),
+	}
+
+	widget.View.SetWrap(true)
+	widget.View.SetWordWrap(true)
+
+	return &widget
+}
+
+/* -------------------- Exported Functions -------------------- */
+
+// MakeGraph - Load the dead drop stats
+func MakeGraph(widget *Widget) {
+
+	//this could come from config
+	const lineCount = 20
+	var stats [lineCount][2]int64
+
+	for i := lineCount - 1; i >= 0; i-- {
+
+		stats[i][1] = time.Now().AddDate(0, 0, i*-1).Unix() * 1000
+		stats[i][0] = int64(rand.Intn(120-5) + 5)
+
+	}
+
+	widget.GraphWidget.BuildBars(20, "🌟", stats[:])
+
+}
+
+// Refresh & update after interval time
+func (widget *Widget) Refresh() {
+
+	if widget.Disabled() {
+		return
+	}
+
+	if started == false {
+		// this code should run once
+		go func() {
+			for {
+				time.Sleep(time.Duration(widget.updateInterval) * time.Second)
+			}
+		}()
+
+	}
+
+	started = true
+
+	widget.UpdateRefreshedAt()
+	widget.View.Clear()
+
+	if !ok {
+		widget.View.SetText(
+			fmt.Sprint("Error!"),
+		)
+		return
+	}
+
+	display(widget)
+
+}
+
+/* -------------------- Unexported Functions -------------------- */
+
+func display(widget *Widget) {
+	MakeGraph(widget)
+}