Initial commit, lots of cleanup and stuff to do, it may not work.

uiterm/textbox.go

@@ -0,0 +1,138 @@
+package uiterm
+
+import (
+	"strings"
+	//	"unicode/utf8"
+
+	"github.com/nsf/termbox-go"
+)
+
+type Textbox struct {
+	Text   string
+	Fg, Bg Attribute
+
+	Input func(ui *Ui, textbox *Textbox, text string)
+
+	ui             *Ui
+	active         bool
+	x0, y0, x1, y1 int
+	pos            int
+}
+
+func (t *Textbox) uiInitialize(ui *Ui) {
+	t.ui = ui
+	t.pos = 0
+}
+
+func (t *Textbox) uiSetActive(active bool) {
+	t.active = active
+	t.uiDraw()
+}
+
+func (t *Textbox) uiSetBounds(x0, y0, x1, y1 int) {
+	t.x0 = x0
+	t.y0 = y0
+	t.x1 = x1
+	t.y1 = y1
+	t.uiDraw()
+}
+
+func (t *Textbox) uiDraw() {
+	t.ui.beginDraw()
+	defer t.ui.endDraw()
+
+	reader := strings.NewReader(t.Text)
+	if t.pos < 0 {
+		t.pos = 0
+	}
+	if t.pos > len(t.Text) {
+		t.pos = len(t.Text)
+	}
+	for y := t.y0; y < t.y1; y++ {
+		for x := t.x0; x < t.x1; x++ {
+			var chr rune
+			if ch, _, err := reader.ReadRune(); err != nil {
+				chr = ' '
+			} else {
+				chr = ch
+			}
+			termbox.SetCell(x, y, chr, termbox.Attribute(t.Fg), termbox.Attribute(t.Bg))
+		}
+	}
+	if t.active {
+		var x = 0
+		var y = 0
+		var idx = -1
+		var flag = false
+		for y = t.y0; y < t.y1; y++ {
+			for x = t.x0; x < t.x1; x++ {
+				idx += 1
+				if idx == t.pos {
+					flag = true
+				}
+				if flag == true {
+					break
+				}
+			}
+			if flag == true {
+				break
+			}
+		}
+		termbox.SetCursor(x, y)
+	}
+}
+
+func (t *Textbox) uiKeyEvent(key Key) {
+	redraw := false
+	switch key {
+	case KeyHome:
+		t.pos = 0
+		redraw = true
+	case KeyEnd:
+		t.pos = len(t.Text)
+		redraw = true
+	case KeyArrowLeft:
+		t.pos -= 1
+		redraw = true
+	case KeyArrowRight:
+		t.pos += 1
+		redraw = true
+	case KeyCtrlC:
+		t.Text = ""
+		t.pos = 0
+		redraw = true
+	case KeyEnter:
+		if t.Input != nil {
+			t.Input(t.ui, t, t.Text)
+		}
+		t.Text = ""
+		t.pos = 0
+		redraw = true
+	case KeySpace:
+		t.uiCharacterEvent(' ')
+	case KeyBackspace:
+	case KeyBackspace2:
+		if len(t.Text) > 0 {
+			if t.pos > 0 {
+				t.Text = t.Text[:t.pos-1] + t.Text[t.pos:]
+				t.pos -= 1
+			}
+		}
+		//			if r, size := utf8.DecodeLastRuneInString(t.Text); r != utf8.RuneError {
+		//				t.Text = t.Text[:len(t.Text)-size]
+		//t.pos-=size
+		redraw = true
+		//			}
+		//		}
+	}
+	if redraw {
+		t.uiDraw()
+	}
+}
+
+func (t *Textbox) uiCharacterEvent(chr rune) {
+	var s = string(chr)
+	t.Text = t.Text[:t.pos] + s + t.Text[t.pos:]
+	t.pos += len(s)
+	t.uiDraw()
+}