init column config menu

config/columns.go

@@ -69,6 +69,13 @@ func EnabledColumns() (a []string) {
 	return a
 }
 
+// ColumnToggle toggles the enabled status of a given column name
+func ColumnToggle(name string) {
+	col := GlobalColumns[colIndex(name)]
+	col.Enabled = !col.Enabled
+	log.Noticef("config change [column-%s]: %t -> %t", col.Name, !col.Enabled, col.Enabled)
+}
+
 // ColumnLeft moves the column with given name up one position, if possible
 func ColumnLeft(name string) {
 	idx := colIndex(name)

config/switch.go

@@ -72,8 +72,7 @@ func Toggle(k string) {
 	lock.Lock()
 	defer lock.Unlock()
 
-	newVal := !sw.Val
-	log.Noticef("config change [%s]: %t -> %t", k, sw.Val, newVal)
-	sw.Val = newVal
+	sw.Val = !sw.Val
+	log.Noticef("config change [%s]: %t -> %t", k, !sw.Val, sw.Val)
 	//log.Errorf("ignoring toggle for non-existant switch: %s", k)
 }

container/main.go

@@ -42,6 +42,12 @@ func New(id string, collector collector.Collector, manager manager.Manager) *Con
 	}
 }
 
+func (c *Container) RecreateWidgets() {
+	c.SetUpdater(cwidgets.NullWidgetUpdater{})
+	c.Widgets = compact.NewCompactRow()
+	c.SetUpdater(c.Widgets)
+}
+
 func (c *Container) SetUpdater(u cwidgets.WidgetUpdater) {
 	c.updater = u
 	c.updater.SetMeta(c.Meta)

cwidgets/compact/grid.go

@@ -17,7 +17,7 @@ type CompactGrid struct {
 
 func NewCompactGrid() *CompactGrid {
 	cg := &CompactGrid{header: NewCompactHeader()}
-	cg.RebuildHeader()
+	cg.rebuildHeader()
 	return cg
 }
 
@@ -30,22 +30,19 @@ func (cg *CompactGrid) Align() {
 
 	// update row ypos, width recursively
 	colWidths := cg.calcWidths()
+	cg.header.SetWidths(cg.Width, colWidths)
 	for _, r := range cg.pageRows() {
 		r.SetY(y)
 		y += r.GetHeight()
 		r.SetWidths(cg.Width, colWidths)
 	}
 }
 
-func (cg *CompactGrid) RebuildHeader() {
-	cg.cols = newRowWidgets()
-	cg.header.clearFieldPars()
-	for _, col := range cg.cols {
-		cg.header.addFieldPar(col.Header())
-	}
+func (cg *CompactGrid) Clear() {
+	cg.Rows = []RowBufferer{}
+	cg.rebuildHeader()
 }
 
-func (cg *CompactGrid) Clear()         { cg.Rows = []RowBufferer{} }
 func (cg *CompactGrid) GetHeight() int { return len(cg.Rows) + cg.header.Height }
 func (cg *CompactGrid) SetX(x int)     { cg.X = x }
 func (cg *CompactGrid) SetY(y int)     { cg.Y = y }
@@ -93,3 +90,11 @@ func (cg *CompactGrid) Buffer() ui.Buffer {
 func (cg *CompactGrid) AddRows(rows ...RowBufferer) {
 	cg.Rows = append(cg.Rows, rows...)
 }
+
+func (cg *CompactGrid) rebuildHeader() {
+	cg.cols = newRowWidgets()
+	cg.header.clearFieldPars()
+	for _, col := range cg.cols {
+		cg.header.addFieldPar(col.Header())
+	}
+}

cwidgets/compact/header.go

@@ -14,7 +14,10 @@ type CompactHeader struct {
 }
 
 func NewCompactHeader() *CompactHeader {
-	return &CompactHeader{Height: 2}
+	return &CompactHeader{
+		X:      rowPadding,
+		Height: 2,
+	}
 }
 
 func (row *CompactHeader) GetHeight() int {

cwidgets/main.go

@@ -11,3 +11,11 @@ type WidgetUpdater interface {
 	SetMeta(models.Meta)
 	SetMetrics(models.Metrics)
 }
+
+type NullWidgetUpdater struct{}
+
+// NullWidgetUpdater implements WidgetUpdater
+func (wu NullWidgetUpdater) SetMeta(models.Meta) {}
+
+// NullWidgetUpdater implements WidgetUpdater
+func (wu NullWidgetUpdater) SetMetrics(models.Metrics) {}

grid.go

@@ -191,6 +191,10 @@ func Display() bool {
 		menu = SortMenu
 		ui.StopLoop()
 	})
+	ui.Handle("/sys/kbd/c", func(ui.Event) {
+		menu = ColumnsMenu
+		ui.StopLoop()
+	})
 	ui.Handle("/sys/kbd/S", func(ui.Event) {
 		path, err := config.Write()
 		if err == nil {

menus.go

@@ -104,7 +104,68 @@ func SortMenu() MenuFn {
 	HandleKeys("exit", ui.StopLoop)
 
 	ui.Handle("/sys/kbd/<enter>", func(ui.Event) {
-		config.Update("sortField", m.SelectedItem().Val)
+		config.Update("sortField", m.SelectedValue())
+		ui.StopLoop()
+	})
+
+	ui.Render(m)
+	ui.Loop()
+	return nil
+}
+
+func ColumnsMenu() MenuFn {
+	ui.Clear()
+	ui.DefaultEvtStream.ResetHandlers()
+	defer ui.DefaultEvtStream.ResetHandlers()
+
+	m := menu.NewMenu()
+	m.Selectable = true
+	m.SortItems = false
+	m.BorderLabel = "Columns"
+
+	rebuild := func() {
+		m.ClearItems()
+		for _, col := range config.GlobalColumns {
+			txt := fmt.Sprintf("%s [%t]", col.Label, col.Enabled)
+			m.AddItems(menu.Item{col.Name, txt})
+		}
+	}
+
+	upFn := func() {
+		config.ColumnLeft(m.SelectedValue())
+		m.Up()
+		rebuild()
+	}
+
+	downFn := func() {
+		config.ColumnRight(m.SelectedValue())
+		m.Down()
+		rebuild()
+	}
+
+	toggleFn := func() {
+		config.ColumnToggle(m.SelectedValue())
+		rebuild()
+	}
+
+	rebuild()
+
+	HandleKeys("up", m.Up)
+	HandleKeys("down", m.Down)
+	HandleKeys("enter", toggleFn)
+	HandleKeys("pgup", upFn)
+	HandleKeys("pgdown", downFn)
+
+	ui.Handle("/sys/kbd/x", func(ui.Event) { toggleFn() })
+	ui.Handle("/sys/kbd/<enter>", func(ui.Event) { toggleFn() })
+
+	HandleKeys("exit", func() {
+		cSource, err := cursor.cSuper.Get()
+		if err == nil {
+			for _, c := range cSource.All() {
+				c.RecreateWidgets()
+			}
+		}
 		ui.StopLoop()
 	})
 
@@ -202,7 +263,7 @@ func ContainerMenu() MenuFn {
 	})
 
 	ui.Handle("/sys/kbd/<enter>", func(ui.Event) {
-		selected = m.SelectedItem().Val
+		selected = m.SelectedValue()
 		ui.StopLoop()
 	})
 	ui.Handle("/sys/kbd/", func(ui.Event) {
@@ -321,7 +382,7 @@ func Confirm(txt string, fn func()) MenuFn {
 		ui.Handle("/sys/kbd/y", func(ui.Event) { yes() })
 
 		ui.Handle("/sys/kbd/<enter>", func(ui.Event) {
-			switch m.SelectedItem().Val {
+			switch m.SelectedValue() {
 			case "cancel":
 				no()
 			case "yes":

widgets/menu/main.go

@@ -55,6 +55,11 @@ func (m *Menu) DelItem(s string) (success bool) {
 	return success
 }
 
+// ClearItems removes all current menu items
+func (m *Menu) ClearItems() {
+	m.items = m.items[:0]
+}
+
 // Move cursor to an position by Item value or label
 func (m *Menu) SetCursor(s string) (success bool) {
 	for n, i := range m.items {
@@ -79,6 +84,10 @@ func (m *Menu) SelectedItem() Item {
 	return m.items[m.cursorPos]
 }
 
+func (m *Menu) SelectedValue() string {
+	return m.items[m.cursorPos].Val
+}
+
 func (m *Menu) Buffer() ui.Buffer {
 	var cell ui.Cell
 	buf := m.Block.Buffer()