Added Datepicker

Some other work too

wdgt_form.go

@@ -19,6 +19,8 @@ THE SOFTWARE.
 package widgets
 
 import (
+	"fmt"
+
 	wh "git.bullercodeworks.com/brian/tcell-widgets/helpers"
 	"github.com/gdamore/tcell"
 )
@@ -59,6 +61,8 @@ func (w *Form) Init(id string, style tcell.Style) {
 	w.style = style
 	w.visible = true
 	w.focusable = true
+	w.submit = NewButton(fmt.Sprintf("%s-submit", id), style)
+	w.cancel = NewButton(fmt.Sprintf("%s-cancel", id), style)
 }
 
 func (w *Form) Id() string { return w.id }
@@ -67,7 +71,9 @@ func (w *Form) HandleResize(ev *tcell.EventResize) {
 	y := 0
 	for i := range w.fields {
 		w.fields[i].SetPos(Coord{X: 0, Y: y})
-		y += w.fields[i].WantH()
+		wantH := w.fields[i].WantH()
+		w.fields[i].HandleResize(Coord{X: w.w, Y: wantH}.ResizeEvent())
+		y += wantH
 	}
 	half := w.w / 2
 	if w.hasCancel && w.hasSubmit {
@@ -99,17 +105,21 @@ func (w *Form) HandleKey(ev *tcell.EventKey) bool {
 	if !w.active {
 		return false
 	}
+	if w.getActive().HandleKey(ev) {
+		return true
+	}
 	if ev.Key() == tcell.KeyTab {
 		fldCnt := len(w.fields)
-		num := fldCnt
 		if w.hasCancel {
-			num += 1
+			fldCnt += 1
 		}
 		if w.hasSubmit {
-			num += 1
-		}
-		if num < fldCnt {
+			fldCnt += 1
 		}
+		pre := w.cursor
+		w.cursor = (w.cursor + 1) % fldCnt
+		w.updateWidgets()
+		return w.cursor > pre
 	}
 	return false
 }
@@ -126,7 +136,14 @@ func (w *Form) Draw(screen tcell.Screen) {
 	}
 	p := w.GetPos()
 	for _, wdgt := range w.fields {
-		p.DrawOffset(wdgt, screen)
+		if !w.Active() {
+			wdAct := wdgt.Active()
+			wdgt.SetActive(false)
+			p.DrawOffset(wdgt, screen)
+			wdgt.SetActive(wdAct)
+		} else {
+			p.DrawOffset(wdgt, screen)
+		}
 	}
 	if w.hasCancel {
 		p.DrawOffset(w.cancel, screen)
@@ -136,8 +153,11 @@ func (w *Form) Draw(screen tcell.Screen) {
 	}
 }
 
-func (w *Form) Active() bool      { return w.active }
-func (w *Form) SetActive(a bool)  { w.active = a }
+func (w *Form) Active() bool { return w.active }
+func (w *Form) SetActive(a bool) {
+	w.active = a
+	w.updateWidgets()
+}
 func (w *Form) Visible() bool     { return w.visible }
 func (w *Form) SetVisible(a bool) { w.visible = a }
 func (w *Form) SetX(x int)        { w.x = x }
@@ -186,6 +206,37 @@ func (w *Form) MinW() int           { return 1 }
 func (w *Form) MinH() int           { return 1 }
 
 // Non-Widget Functions
+func (w *Form) updateWidgets() {
+	for i := 0; i < len(w.fields); i++ {
+		w.fields[i].SetActive(w.Active() && i == w.cursor)
+	}
+	if w.hasCancel {
+		w.cancel.SetActive(w.Active() && w.cursor == len(w.fields))
+		if w.hasSubmit {
+			w.submit.SetActive(w.Active() && w.cursor == len(w.fields)+1)
+		}
+	} else if w.hasSubmit {
+		w.submit.SetActive(w.Active() && w.cursor == len(w.fields))
+	}
+}
+
+func (w *Form) getActive() Widget {
+	if w.cursor < len(w.fields) {
+		return w.fields[w.cursor]
+	}
+	if w.cursor == len(w.fields) {
+		if w.hasCancel {
+			return w.cancel
+		}
+		if w.hasSubmit {
+			return w.submit
+		}
+	} else if w.cursor > len(w.fields) && w.hasSubmit {
+		return w.submit
+	}
+	return nil
+}
+
 func (w *Form) IndexOf(n Widget) int {
 	for i := range w.fields {
 		if w.fields[i] == n {