Add custom event handling

_example/dashboard.go

@@ -21,6 +21,14 @@ func main() {
 	p.TextFgColor = ui.ColorWhite
 	p.BorderLabel = "Text Box"
 	p.BorderFg = ui.ColorCyan
+	p.Handle("/timer/1s", func(e ui.Event) {
+		cnt := e.Data.(ui.EvtTimer)
+		if cnt.Count%2 == 0 {
+			p.TextFgColor = ui.ColorRed
+		} else {
+			p.TextFgColor = ui.ColorWhite
+		}
+	})
 
 	strs := []string{"[0] gizak/termui", "[1] editbox.go", "[2] iterrupt.go", "[3] keyboard.go", "[4] output.go", "[5] random_out.go", "[6] dashboard.go", "[7] nsf/termbox-go"}
 	list := ui.NewList()

events.go

@@ -315,3 +315,13 @@ func NewTimerCh(du time.Duration) chan Event {
 
 var DefualtHandler = func(e Event) {
 }
+
+var usrEvtCh = make(chan Event)
+
+func SendCustomEvt(path string, data interface{}) {
+	e := Event{}
+	e.Path = path
+	e.Data = data
+	e.Time = time.Now().Unix()
+	usrEvtCh <- e
+}

render.go

@@ -41,6 +41,8 @@ func Init() error {
 	DefaultEvtStream.Init()
 	DefaultEvtStream.Merge("termbox", NewSysEvtCh())
 	DefaultEvtStream.Merge("timer", NewTimerCh(time.Second))
+	DefaultEvtStream.Merge("custom", usrEvtCh)
+
 	DefaultEvtStream.Handle("/", DefualtHandler)
 	DefaultEvtStream.Handle("/sys/wnd/resize", func(e Event) {
 		w := e.Data.(EvtWnd)

test/runtest.go

@@ -40,8 +40,13 @@ func main() {
 		}
 	})
 
+	termui.Handle(("/usr"), func(e termui.Event) {
+		debug.Logf("->%v\n", e)
+	})
+
 	termui.Handle("/timer/1s", func(e termui.Event) {
 		t := e.Data.(termui.EvtTimer)
+		termui.SendCustomEvt("/usr/t", t.Count)
 
 		if t.Count%2 == 0 {
 			b.BorderLabel = "[HELLO](fg-red,bg-green) [WORLD](fg-blue,bg-white)"
@@ -52,5 +57,6 @@ func main() {
 		termui.Render(b)
 
 	})
+
 	termui.Loop()
 }

widget.go

@@ -80,3 +80,11 @@ func (wm WgtMgr) WgtHandlersHook() func(Event) {
 }
 
 var DefaultWgtMgr WgtMgr
+
+func (b *Block) Handle(path string, handler func(Event)) {
+	if _, ok := DefaultWgtMgr[b.Id()]; !ok {
+		DefaultWgtMgr.AddWgt(b)
+	}
+
+	DefaultWgtMgr.AddWgtHandler(b.Id(), path, handler)
+}