refactor all container widgets into subpackage

cwidgets/compact/header.go

@@ -0,0 +1,48 @@
+package compact
+
+import (
+	ui "github.com/gizak/termui"
+)
+
+type CompactHeader struct {
+	pars []*ui.Par
+}
+
+func NewCompactHeader() *CompactHeader {
+	fields := []string{"", "NAME", "CID", "CPU", "MEM", "NET RX/TX"}
+	header := &CompactHeader{}
+	for _, f := range fields {
+		header.pars = append(header.pars, slimHeaderPar(f))
+	}
+	return header
+}
+
+func (c *CompactHeader) SetWidth(w int) {
+	x := 1
+	autoWidth := calcWidth(w, 5)
+	for n, col := range c.pars {
+		if n == 0 {
+			col.SetX(x)
+			col.SetWidth(statusWidth)
+			x += statusWidth
+			continue
+		}
+		col.SetX(x)
+		col.SetWidth(autoWidth)
+		x += autoWidth + colSpacing
+	}
+}
+
+func (c *CompactHeader) SetY(y int) {
+	for _, p := range c.pars {
+		p.SetY(y)
+	}
+}
+
+func (c *CompactHeader) Buffer() ui.Buffer {
+	buf := ui.NewBuffer()
+	for _, p := range c.pars {
+		buf.Merge(p.Buffer())
+	}
+	return buf
+}