A lot of layout work

wdgt_button.go

@@ -0,0 +1,145 @@
+/*
+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"
+	"strings"
+
+	wh "git.bullercodeworks.com/brian/tcell-widgets/helpers"
+	"github.com/gdamore/tcell"
+)
+
+type Button struct {
+	id    string
+	label string
+	style tcell.Style
+	x, y  int
+	w, h  int
+
+	active   bool
+	visible  bool
+	tabbable bool
+
+	onPressed func() bool
+}
+
+var _ Widget = (*Button)(nil)
+
+func NewButton(id string, style tcell.Style) *Button {
+	b := &Button{}
+	b.Init(id, style)
+	return b
+}
+
+func (w *Button) Init(id string, style tcell.Style) {
+	w.id = id
+	w.style = style
+	w.visible = true
+	w.onPressed = func() bool { return false }
+	w.tabbable = true
+}
+func (w *Button) Id() string { return w.id }
+func (w *Button) HandleResize(ev *tcell.EventResize) {
+	w.w, w.h = ev.Size()
+	// w.w = wh.Min(w.w, w.WantW())
+	// w.h = wh.Min(w.h, w.WantH())
+}
+
+func (w *Button) HandleKey(ev *tcell.EventKey) bool {
+	if !w.active {
+		return false
+	}
+	if ev.Key() == tcell.KeyEnter {
+		return w.onPressed()
+	}
+	return false
+}
+func (w *Button) HandleTime(ev *tcell.EventTime) {}
+func (w *Button) Draw(screen tcell.Screen) {
+	if !w.visible {
+		return
+	}
+	dStyle := w.style
+	if w.active {
+		dStyle = w.style.Bold(true)
+	}
+	switch w.h {
+	case 1:
+		lbl := w.label
+		if w.w < len(lbl) {
+			lbl = lbl[:w.w]
+		} else if w.w == len(w.label)+2 {
+			lbl = fmt.Sprintf("[%s]", lbl)
+		} else if w.w > len(w.label)+2 {
+			lbl = fmt.Sprintf("[%s]", wh.Center(lbl, w.w-2))
+		}
+		wh.DrawText(w.x, w.y, lbl, dStyle, screen)
+	case 2:
+		lbl := w.label
+		if w.w < len(lbl) {
+			lbl = lbl[:w.w]
+		} else if w.w == len(lbl)+2 {
+			lbl = fmt.Sprintf("╭%s╮", lbl)
+		}
+		wh.DrawText(w.x, w.y, lbl, dStyle, screen)
+		wh.DrawText(w.x, w.y+1, fmt.Sprintf("╰%s╯", strings.Repeat("─", len(lbl)-2)), dStyle, screen)
+		return
+	}
+	if w.w < 2 {
+		wh.DrawText(w.x, w.y, "╬", dStyle, screen)
+		return
+	} else if w.w == 2 {
+		wh.DrawText(w.x, w.y, "[]", dStyle, screen)
+		return
+	}
+	lbl := wh.Center(w.label, w.w-2)
+	wh.DrawText(w.x, w.y, fmt.Sprintf("╭%s╮", strings.Repeat("─", w.w-2)), dStyle, screen)
+	wh.DrawText(w.x, w.y+1, fmt.Sprintf("│%s│", wh.Center(lbl, w.w-2)), dStyle, screen)
+	wh.DrawText(w.x, w.y+2, fmt.Sprintf("╰%s╯", strings.Repeat("─", w.w-2)), dStyle, screen)
+}
+
+func (w *Button) Active() bool       { return w.active }
+func (w *Button) SetActive(a bool)   { w.active = a }
+func (w *Button) Visible() bool      { return w.visible }
+func (w *Button) SetVisible(a bool)  { w.visible = a }
+func (w *Button) SetX(x int)         { w.x = x }
+func (w *Button) SetY(y int)         { w.y = y }
+func (w *Button) GetX() int          { return w.x }
+func (w *Button) GetY() int          { return w.y }
+func (w *Button) GetPos() Coord      { return Coord{X: w.x, Y: w.y} }
+func (w *Button) SetPos(c Coord)     { w.x, w.y = c.X, c.Y }
+func (w *Button) SetW(x int)         { w.w = x }
+func (w *Button) SetH(y int)         { w.h = y }
+func (w *Button) GetW() int          { return w.w }
+func (w *Button) GetH() int          { return w.y }
+func (w *Button) WantW() int         { return 4 + len(w.label) }
+func (w *Button) WantH() int         { return 3 }
+func (w *Button) SetSize(c Coord)    { w.w, w.h = c.X, c.Y }
+func (w *Button) Focusable() bool    { return true }
+func (w *Button) SetTabbable(b bool) { w.tabbable = b }
+func (w *Button) Tabbable() bool     { return w.tabbable }
+func (w *Button) MinW() int          { return len(w.label) + 2 }
+func (w *Button) MinH() int          { return 1 }
+
+func (w *Button) SetLabel(l string)          { w.label = l }
+func (w *Button) SetOnPressed(p func() bool) { w.onPressed = p }