Add multi-line text inputs

textinput.go

@@ -10,27 +10,47 @@ var _ tomo.ContentObject = new(TextInput)
 
 // TextInput is a single-line editable text box.
 type TextInput struct {
-	box  tomo.TextBox
-	text []rune
+	box       tomo.TextBox
+	text      []rune
+	multiline bool
 	on struct {
 		valueChange event.FuncBroadcaster
 		confirm     event.FuncBroadcaster
 	}
 }
 
-// NewTextInput creates a new text input containing the specified text.
-func NewTextInput (text string) *TextInput {
-	textInput := &TextInput { box: tomo.NewTextBox() }
+func newTextInput (text string, multiline bool) *TextInput {
+	textInput := &TextInput {
+		box:       tomo.NewTextBox(),
+		multiline: multiline,
+	}
 	textInput.box.SetRole(tomo.R("objects", "TextInput"))
-	textInput.box.SetAttr(tomo.AAlign(tomo.AlignStart, tomo.AlignMiddle))
-	textInput.box.SetAttr(tomo.AOverflow(true, false))
+	textInput.box.SetTag("multiline", multiline)
+	if multiline {
+		textInput.box.SetAttr(tomo.AOverflow(false, true))
+		textInput.box.SetAttr(tomo.AAlign(tomo.AlignStart, tomo.AlignStart))
+	} else {
+		textInput.box.SetAttr(tomo.AOverflow(true, false))
+		textInput.box.SetAttr(tomo.AAlign(tomo.AlignStart, tomo.AlignMiddle))
+	}
 	textInput.SetValue(text)
 	textInput.box.SetFocusable(true)
 	textInput.box.SetSelectable(true)
 	textInput.box.OnKeyDown(textInput.handleKeyDown)
 	textInput.box.OnKeyUp(textInput.handleKeyUp)
 	textInput.box.OnScroll(textInput.handleScroll)
-	return textInput
+	return textInput	
+}
+
+// NewTextInput creates a new text input containing the specified text.
+func NewTextInput (text string) *TextInput {
+	return newTextInput(text, false)
+}
+
+// NewMultilineTextInput creates a new multiline text input containing the
+// specified text.
+func NewMultilineTextInput (text string) *TextInput {
+	return newTextInput(text, true)
 }
 
 // GetBox returns the underlying box.
@@ -123,6 +143,19 @@ func (this *TextInput) handleKeyDown (key input.Key, numpad bool) bool {
 		}
 	} ()
 
+	typ := func () {
+		this.text, dot = text.Type(this.text, dot, rune(key))
+		changed = true
+	}
+
+	if this.multiline && !modifiers.Control {
+		switch {
+		case key == '\n', key == '\t':
+			typ()
+			return true
+		}
+	}
+
 	switch {
 	case isConfirmationKey(key):
 		this.on.confirm.Broadcast()
@@ -136,8 +169,7 @@ func (this *TextInput) handleKeyDown (key input.Key, numpad bool) bool {
 		changed = true
 		return true
 	case key.Printable() && !modifiers.Control:
-		this.text, dot = text.Type(this.text, dot, rune(key))
-		changed = true
+		typ()
 		return true
 	default:
 		return false
@@ -146,6 +178,14 @@ func (this *TextInput) handleKeyDown (key input.Key, numpad bool) bool {
 
 func (this *TextInput) handleKeyUp (key input.Key, numpad bool) bool {
 	modifiers := this.box.Window().Modifiers()
+
+	if this.multiline && !modifiers.Control {
+		switch {
+		case key == '\n', key == '\t':
+			return true
+		}
+	}
+	
 	switch {
 	case isConfirmationKey(key):
 		return true