Added Datepicker

Some other work too

wdgt_datepicker.go

@@ -0,0 +1,216 @@
+/*
+Copyright © Brian Buller <brian@bullercodeworks.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+package widgets
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/gdamore/tcell"
+)
+
+type DatePicker struct {
+	id    string
+	style tcell.Style
+
+	x, y       int
+	w, h       int
+	lookActive bool
+	active     bool
+	visible    bool
+	focusable  bool
+
+	date   time.Time
+	format string
+
+	dateFld *Field
+	dateNow *Button
+
+	keyMap KeyMap
+
+	logger func(string, ...any)
+}
+
+var _ Widget = (*DatePicker)(nil)
+
+func NewDatePicker(id string, s tcell.Style) *DatePicker {
+	ret := &DatePicker{}
+	ret.Init(id, s)
+	return ret
+}
+
+func (w *DatePicker) Init(id string, s tcell.Style) {
+	w.id = id
+	w.style = s
+	w.visible = true
+	w.focusable = true
+
+	w.format = time.RFC3339
+
+	w.dateFld = NewField(fmt.Sprintf("%s-date", id), s)
+	w.dateFld.SetValue(w.date.Format(w.format))
+	w.dateFld.SetH(1)
+
+	w.dateNow = NewButton(fmt.Sprintf("%s-now", id), s)
+	w.dateNow.SetLabel("Now")
+	w.dateNow.SetOnPressed(func() bool {
+		w.SetValue(time.Now())
+		return true
+	})
+	w.dateNow.SetW(5)
+	w.dateNow.SetH(1)
+
+	w.initKeyMap()
+}
+
+func (w *DatePicker) Id() string { return w.id }
+func (w *DatePicker) HandleResize(ev *tcell.EventResize) {
+	wd, ht := ev.Size()
+	w.SetW(wd)
+	w.SetH(ht)
+	if wd >= w.WantW() {
+		w.dateFld.HandleResize(Coord{X: w.dateFld.WantW(), Y: ht}.ResizeEvent())
+		w.dateNow.HandleResize(Coord{X: w.dateNow.WantW(), Y: ht}.ResizeEvent())
+	}
+	w.dateFld.SetPos(Coord{X: 0, Y: 0})
+	w.dateNow.SetPos(Coord{X: wd - 6, Y: 0})
+}
+
+func (w *DatePicker) SetKeyMap(km KeyMap)   { w.keyMap = km }
+func (w *DatePicker) AddToKeyMap(km KeyMap) { w.keyMap.Merge(km) }
+func (w *DatePicker) RemoveFromKeyMap(km KeyMap) {
+	for k := range km.Keys {
+		w.keyMap.Remove(k)
+	}
+	for r := range km.Runes {
+		w.keyMap.RemoveRune(r)
+	}
+}
+
+func (w *DatePicker) HandleKey(ev *tcell.EventKey) bool {
+	if !w.active {
+		return false
+	}
+	if ev.Key() == tcell.KeyTab {
+		if w.dateFld.Active() {
+			w.dateFld.SetActive(false)
+			w.dateNow.SetActive(true)
+			return true
+		} else if w.dateNow.Active() {
+			w.dateFld.SetActive(false)
+			w.dateNow.SetActive(false)
+			return false
+		}
+		return false
+	}
+	if w.dateFld.Active() {
+		if w.dateFld.HandleKey(ev) {
+			// Date Field updated, see if we can parse it.
+			dt, err := time.Parse(w.format, w.dateFld.Value())
+			if err == nil {
+				w.date = dt
+			}
+		}
+	} else if w.dateNow.Active() {
+		return w.dateNow.HandleKey(ev)
+	}
+	return w.keyMap.Handle(ev)
+}
+func (w *DatePicker) HandleTime(ev *tcell.EventTime) {}
+func (w *DatePicker) Draw(screen tcell.Screen) {
+	if !w.visible {
+		return
+	}
+
+	w.GetPos().DrawOffset(w.dateFld, screen)
+	w.GetPos().DrawOffset(w.dateNow, screen)
+}
+
+func (w *DatePicker) Active() bool { return w.active }
+func (w *DatePicker) SetActive(a bool) {
+	if !w.active && a {
+		// Wasn't active, but turning on
+		w.dateFld.SetActive(true)
+	}
+	w.active = a
+}
+func (w *DatePicker) Visible() bool       { return w.visible }
+func (w *DatePicker) SetVisible(a bool)   { w.visible = a }
+func (w *DatePicker) Focusable() bool     { return w.focusable }
+func (w *DatePicker) SetFocusable(b bool) { w.focusable = b }
+func (w *DatePicker) SetX(x int)          { w.x = x }
+func (w *DatePicker) SetY(y int)          { w.y = y }
+func (w *DatePicker) GetX() int           { return w.x }
+func (w *DatePicker) GetY() int           { return w.y }
+func (w *DatePicker) GetPos() Coord       { return Coord{X: w.x, Y: w.y} }
+func (w *DatePicker) SetPos(c Coord)      { w.x, w.y = c.X, c.Y }
+func (w *DatePicker) GetW() int           { return w.w }
+func (w *DatePicker) GetH() int           { return w.h }
+func (w *DatePicker) SetW(wd int)         { w.w = wd }
+func (w *DatePicker) SetH(h int)          { w.h = h }
+func (w *DatePicker) SetSize(c Coord) {
+	w.SetW(c.X)
+	w.SetH(c.Y)
+}
+
+func (w *DatePicker) WantW() int {
+	return w.dateFld.WantW() + w.dateNow.WantW() + 2
+}
+
+func (w *DatePicker) WantH() int {
+	return 1
+}
+func (w *DatePicker) MinW() int { return w.dateFld.MinW() + w.dateNow.MinW() + 2 }
+func (w *DatePicker) MinH() int { return 1 }
+
+func (w *DatePicker) updateUI() {
+	w.dateFld.SetValue(w.date.Format(w.format))
+	w.dateFld.SetSize(Coord{X: len(w.dateFld.Label()) + len(w.format) + 3, Y: 1})
+	w.dateNow.SetSize(Coord{X: 5, Y: 1})
+}
+
+func (w *DatePicker) initKeyMap() {
+	w.keyMap = NewKeyMap(map[tcell.Key]func(ev *tcell.EventKey) bool{})
+}
+
+func (w *DatePicker) Format() string { return w.format }
+func (w *DatePicker) SetFormat(fmt string) {
+	w.format = fmt
+	w.updateUI()
+}
+func (w *DatePicker) Label() string { return w.dateFld.Label() }
+func (w *DatePicker) SetLabel(lbl string) {
+	w.dateFld.SetLabel(lbl)
+	w.updateUI()
+}
+func (w *DatePicker) Value() time.Time { return w.date }
+func (w *DatePicker) SetValue(t time.Time) {
+	w.date = t
+	w.updateUI()
+}
+
+func (w *DatePicker) SetLogger(l func(string, ...any)) { w.logger = l }
+func (w *DatePicker) Log(t string, a ...any) {
+	if w.logger != nil {
+		w.logger(t, a...)
+	}
+}