Work

list.go

@@ -0,0 +1,191 @@
+/*
+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 (
+	h "git.bullercodeworks.com/brian/tcell-widgets/helpers"
+	"github.com/gdamore/tcell"
+)
+
+type List struct {
+	id        string
+	title     string
+	style     tcell.Style
+	active    bool
+	visible   bool
+	focusable bool
+
+	x, y         int
+	w, h         int
+	wantW, wantH int
+
+	border     []rune
+	cursor     int
+	cursorWrap bool
+	list       []string
+
+	onSelect func(string) bool
+	keyMap   KeyMap
+}
+
+var _ Widget = (*List)(nil)
+
+func NewList(id string, style tcell.Style) *List {
+	ret := &List{style: style}
+	ret.Init(id, style)
+	return ret
+}
+
+func (w *List) Init(id string, style tcell.Style) {
+	w.id = id
+	w.style = style
+	w.keyMap = NewKeyMap(map[tcell.Key]func() bool{
+		tcell.KeyUp:   w.MoveUp,
+		tcell.KeyDown: w.MoveDown,
+		tcell.KeyEnter: func() bool {
+			if w.onSelect != nil && w.cursor < len(w.list) {
+				return w.onSelect(w.list[w.cursor])
+			}
+			return false
+		},
+	})
+}
+func (w *List) Id() string                         { return w.id }
+func (w *List) HandleResize(ev *tcell.EventResize) {}
+
+func (w *List) HandleKey(ev *tcell.EventKey) bool {
+	if !w.active || !w.focusable {
+		return false
+	}
+	return false
+}
+func (w *List) HandleTime(ev *tcell.EventTime) {}
+func (w *List) Draw(screen tcell.Screen) {
+	dS := w.style
+	if !w.active {
+		dS = dS.Dim(true)
+	}
+	x, y := w.x, w.y
+	brdSz := 0
+	if len(w.border) > 0 {
+		brdSz = 2
+		if len(w.title) > 0 {
+			h.TitledBorderFilled(x, y, x+w.w, y+w.h, w.title, w.border, dS, screen)
+		} else {
+			h.BorderFilled(x, y, x+w.w, y+w.h, w.border, dS, screen)
+		}
+	}
+	x, y = x+1, y+1
+	for i := range w.list {
+		if i == w.cursor {
+			dS = dS.Reverse(true)
+		}
+		txt := w.list[i]
+		if len(txt) > w.w-brdSz {
+			txt = txt[:(w.w - brdSz)]
+			h.DrawText(x, y, txt, dS, screen)
+		}
+	}
+}
+func (w *List) Active() bool      { return w.active }
+func (w *List) SetActive(a bool)  { w.active = a }
+func (w *List) Visible() bool     { return w.visible }
+func (w *List) SetVisible(a bool) { w.visible = a }
+func (w *List) SetX(x int)        { w.x = x }
+func (w *List) SetY(y int)        { w.y = y }
+func (w *List) GetX() int         { return w.x }
+func (w *List) GetY() int         { return w.y }
+func (w *List) SetPos(c Coord)    { w.x, w.y = c.X, c.Y }
+func (w *List) SetW(x int)        { w.w = x }
+func (w *List) SetH(y int)        { w.h = y }
+func (w *List) GetW() int         { return w.w }
+func (w *List) GetH() int         { return w.y }
+func (w *List) SetSize(c Coord)   { w.w, w.h = c.X, c.Y }
+func (w *List) Focusable() bool   { return w.focusable }
+func (w *List) WantW() int {
+	lng := h.Longest(w.list)
+	if len(w.border) > 0 {
+		return lng + 2
+	}
+	return lng
+}
+
+func (w *List) WantH() int {
+	lng := len(w.list)
+	if len(w.border) > 0 {
+		return lng + 2
+	}
+	return lng
+}
+
+func (w *List) SetFocusable(f bool) { w.focusable = f }
+
+func (w *List) SetCursorWrap(b bool) { w.cursorWrap = b }
+
+func (w *List) MoveUp() bool {
+	if w.cursor > 0 {
+		w.cursor--
+		return true
+	} else if w.cursorWrap {
+		w.cursor = len(w.list) - 1
+		return true
+	}
+	return false
+}
+
+func (w *List) MoveDown() bool {
+	if w.cursor < len(w.list) {
+		w.cursor++
+		return true
+	} else if w.cursorWrap {
+		w.cursor = 0
+		return true
+	}
+	return false
+}
+
+func (w *List) SetTitle(ttl string) { w.title = ttl }
+func (w *List) SetList(l []string)  { w.list = l }
+func (w *List) Add(l string)        { w.list = append(w.list, l) }
+func (w *List) Remove(l string) {
+	var idx int
+	var found bool
+	for idx = range w.list {
+		if w.list[idx] == l {
+			found = true
+			break
+		}
+	}
+	if found {
+		w.list = append(w.list[:idx], w.list[idx+1:]...)
+	}
+}
+
+func (w *List) SetBorder(brd []rune) {
+	if len(brd) == 0 {
+		w.border = h.BRD_SIMPLE
+	} else {
+		w.border = h.ValidateBorder(brd)
+	}
+}
+
+func (w *List) ClearBorder() { w.border = []rune{} }