Implemented Textbox on GTK+.

textbox_unix.go

@@ -0,0 +1,46 @@
+// +build !windows,!darwin
+
+// 23 october 2014
+
+package ui
+
+import (
+	"unsafe"
+)
+
+// #include "gtk_unix.h"
+import "C"
+
+type textbox struct {
+	*scroller
+	textview		*C.GtkTextView
+}
+
+func newTextbox() Textbox {
+	widget := C.gtk_text_view_new()
+	t := &textbox{
+		scroller:		newScroller(widget, true, true, false),		// natively scrollable, has a border, no overlay
+		textview:		(*C.GtkTextView)(unsafe.Pointer(widget)),
+	}
+	return t
+}
+
+func (t *textbox) Text() string {
+	var start, end C.GtkTextIter
+
+	buf := C.gtk_text_view_get_buffer(t.textview)
+	C.gtk_text_buffer_get_bounds(buf, &start, &end)
+	// include hidden chars even though there can't be one since Textbox is explicitly unformatted just to be safe
+	// don't worry about embedded pixbufs or widgets; those aren't allowed either
+	ctext := C.gtk_text_buffer_get_text(buf, &start, &end, C.TRUE)
+	// not explicitly documented: have to manually free this (thanks ste in irc.gimp.net/#gtk+)
+	defer C.g_free(C.gpointer(unsafe.Pointer(ctext)))
+	return fromgstr(ctext)
+}
+
+func (t *textbox) SetText(text string) {
+	ctext := togstr(text)
+	defer freegstr(ctext)
+	buf := C.gtk_text_view_get_buffer(t.textview)
+	C.gtk_text_buffer_set_text(buf, ctext, -1)		// null-terminated
+}