init expanded view, add cpu histogram

widgets/expanded_cpu.go

@@ -0,0 +1,30 @@
+package widgets
+
+import (
+	ui "github.com/gizak/termui"
+)
+
+type ExpandedCpu struct {
+	*ui.BarChart
+	hist HistData
+}
+
+func NewExpandedCpu() *ExpandedCpu {
+	cpu := &ExpandedCpu{ui.NewBarChart(), NewHistData(12)}
+	cpu.BorderLabel = "CPU Util"
+	cpu.Height = 10
+	cpu.Width = 50
+	cpu.BarColor = ui.ColorGreen
+	cpu.BarWidth = 3
+	cpu.BarGap = 1
+	cpu.X = 0
+	cpu.Y = 4
+	cpu.Data = cpu.hist.data
+	cpu.DataLabels = cpu.hist.labels
+	return cpu
+}
+
+func (w *ExpandedCpu) Update(val int) {
+	w.hist.Append(val)
+	w.Data = w.hist.data
+}