Got rid of gtkWidget and changed to using *C.GtkWidget everywhere. This gets rid of some of the casting functions and invocations of said functions, and only adds sysdata_unix.go to the cgo list.

area_unix.go

@@ -20,7 +20,7 @@ import (
 // extern gboolean our_area_key_release_event_callback(GtkWidget *, GdkEvent *, gpointer);
 import "C"
 
-func gtkAreaNew() *gtkWidget {
+func gtkAreaNew() *C.GtkWidget {
 	drawingarea := C.gtk_drawing_area_new()
 	C.gtk_widget_set_size_request(drawingarea, 100, 100)		// default initial size (TODO do we need it?); use C. to avoid casting drawingarea
 	// we need to explicitly subscribe to mouse events with GtkDrawingArea
@@ -31,13 +31,13 @@ func gtkAreaNew() *gtkWidget {
 	scrollarea := C.gtk_scrolled_window_new((*C.GtkAdjustment)(nil), (*C.GtkAdjustment)(nil))
 	// need a viewport because GtkDrawingArea isn't natively scrollable
 	C.gtk_scrolled_window_add_with_viewport((*C.GtkScrolledWindow)(unsafe.Pointer(scrollarea)), drawingarea)
-	return fromgtkwidget(scrollarea)
+	return scrollarea
 }
 
-func gtkAreaGetControl(scrollarea *gtkWidget) *gtkWidget {
+func gtkAreaGetControl(scrollarea *C.GtkWidget) *C.GtkWidget {
 	viewport := C.gtk_bin_get_child((*C.GtkBin)(unsafe.Pointer(scrollarea)))
 	control := C.gtk_bin_get_child((*C.GtkBin)(unsafe.Pointer(viewport)))
-	return fromgtkwidget(control)
+	return control
 }
 
 //export our_area_draw_callback

callbacks_unix.go

@@ -70,10 +70,10 @@ var button_clicked_callback = C.GCallback(C.our_button_clicked_callback)
 type callbackMap map[string]C.GCallback
 
 // this is what actually connects a signal
-func g_signal_connect(obj *gtkWidget, sig string, callback C.GCallback, sysData *sysData) {
+func g_signal_connect(obj *C.GtkWidget, sig string, callback C.GCallback, sysData *sysData) {
 	csig := C.CString(sig)
 	defer C.free(unsafe.Pointer(csig))
-	C.gSignalConnect(togtkwidget(obj), csig, callback, unsafe.Pointer(sysData))
+	C.gSignalConnect(obj, csig, callback, unsafe.Pointer(sysData))
 }
 
 // there are two issues we solve here:

gtkcalls_unix.go

@@ -13,10 +13,6 @@ import (
 // #include "gtk_unix.h"
 import "C"
 
-type (
-	gtkWidget C.GtkWidget
-)
-
 func gtk_init() bool {
 	// TODO allow GTK+ standard command-line argument processing
 	return fromgbool(C.gtk_init_check((*C.int)(nil), (***C.char)(nil)))
@@ -30,35 +26,34 @@ func gtk_main_quit() {
 	C.gtk_main_quit()
 }
 
-func gtk_window_new() *gtkWidget {
+func gtk_window_new() *C.GtkWidget {
-	// 0 == GTK_WINDOW_TOPLEVEL (the only other type, _POPUP, should not be used)
+	return C.gtk_window_new(C.GTK_WINDOW_TOPLEVEL)
-	return fromgtkwidget(C.gtk_window_new(0))
 }
 
 // TODO ensure this works if called on an individual control
-func gtk_widget_show(widget *gtkWidget) {
+func gtk_widget_show(widget *C.GtkWidget) {
-	C.gtk_widget_show_all(togtkwidget(widget))
+	C.gtk_widget_show_all(widget)
 }
 
-func gtk_widget_hide(widget *gtkWidget) {
+func gtk_widget_hide(widget *C.GtkWidget) {
-	C.gtk_widget_hide(togtkwidget(widget))
+	C.gtk_widget_hide(widget)
 }
 
-func gtk_window_set_title(window *gtkWidget, title string) {
+func gtk_window_set_title(window *C.GtkWidget, title string) {
 	ctitle := C.CString(title)
 	defer C.free(unsafe.Pointer(ctitle))
 	C.gtk_window_set_title(togtkwindow(window), togchar(ctitle))
 }
 
-func gtk_window_get_title(window *gtkWidget) string {
+func gtk_window_get_title(window *C.GtkWidget) string {
 	return C.GoString(fromgchar(C.gtk_window_get_title(togtkwindow(window))))
 }
 
-func gtk_window_resize(window *gtkWidget, width int, height int) {
+func gtk_window_resize(window *C.GtkWidget, width int, height int) {
 	C.gtk_window_resize(togtkwindow(window), C.gint(width), C.gint(height))
 }
 
-func gtk_window_get_size(window *gtkWidget) (int, int) {
+func gtk_window_get_size(window *C.GtkWidget) (int, int) {
 	var width, height C.gint
 
 	C.gtk_window_get_size(togtkwindow(window), &width, &height)
@@ -67,152 +62,152 @@ func gtk_window_get_size(window *gtkWidget) (int, int) {
 
 // this should allow us to resize the window arbitrarily
 // thanks to Company in irc.gimp.net/#gtk+
-func gtkNewWindowLayout() *gtkWidget {
+func gtkNewWindowLayout() *C.GtkWidget {
 	layout := C.gtk_layout_new(nil, nil)
 	scrollarea := C.gtk_scrolled_window_new((*C.GtkAdjustment)(nil), (*C.GtkAdjustment)(nil))
 	C.gtk_container_add((*C.GtkContainer)(unsafe.Pointer(scrollarea)), layout)
 	// never show scrollbars; we're just doing this to allow arbitrary resizes
 	C.gtk_scrolled_window_set_policy((*C.GtkScrolledWindow)(unsafe.Pointer(scrollarea)),
 		C.GTK_POLICY_NEVER, C.GTK_POLICY_NEVER)
-	return fromgtkwidget(scrollarea)
+	return scrollarea
 }
 
-func gtk_container_add(container *gtkWidget, widget *gtkWidget) {
+func gtk_container_add(container *C.GtkWidget, widget *C.GtkWidget) {
-	C.gtk_container_add(togtkcontainer(container), togtkwidget(widget))
+	C.gtk_container_add(togtkcontainer(container), widget)
 }
 
-func gtkAddWidgetToLayout(container *gtkWidget, widget *gtkWidget) {
+func gtkAddWidgetToLayout(container *C.GtkWidget, widget *C.GtkWidget) {
 	layout := C.gtk_bin_get_child((*C.GtkBin)(unsafe.Pointer(container)))
-	C.gtk_container_add((*C.GtkContainer)(unsafe.Pointer(layout)), togtkwidget(widget))
+	C.gtk_container_add((*C.GtkContainer)(unsafe.Pointer(layout)), widget)
 }
 
-func gtkMoveWidgetInLayout(container *gtkWidget, widget *gtkWidget, x int, y int) {
+func gtkMoveWidgetInLayout(container *C.GtkWidget, widget *C.GtkWidget, x int, y int) {
 	layout := C.gtk_bin_get_child((*C.GtkBin)(unsafe.Pointer(container)))
-	C.gtk_layout_move((*C.GtkLayout)(unsafe.Pointer(layout)), togtkwidget(widget),
+	C.gtk_layout_move((*C.GtkLayout)(unsafe.Pointer(layout)), widget,
 		C.gint(x), C.gint(y))
 }
 
-func gtk_widget_set_size_request(widget *gtkWidget, width int, height int) {
+func gtk_widget_set_size_request(widget *C.GtkWidget, width int, height int) {
-	C.gtk_widget_set_size_request(togtkwidget(widget), C.gint(width), C.gint(height))
+	C.gtk_widget_set_size_request(widget, C.gint(width), C.gint(height))
 }
 
-func gtk_button_new() *gtkWidget {
+func gtk_button_new() *C.GtkWidget {
-	return fromgtkwidget(C.gtk_button_new())
+	return C.gtk_button_new()
 }
 
-func gtk_button_set_label(button *gtkWidget, label string) {
+func gtk_button_set_label(button *C.GtkWidget, label string) {
 	clabel := C.CString(label)
 	defer C.free(unsafe.Pointer(clabel))
 	C.gtk_button_set_label(togtkbutton(button), togchar(clabel))
 }
 
-func gtk_button_get_label(button *gtkWidget) string {
+func gtk_button_get_label(button *C.GtkWidget) string {
 	return C.GoString(fromgchar(C.gtk_button_get_label(togtkbutton(button))))
 }
 
-func gtk_check_button_new() *gtkWidget {
+func gtk_check_button_new() *C.GtkWidget {
-	return fromgtkwidget(C.gtk_check_button_new())
+	return C.gtk_check_button_new()
 }
 
-func gtk_toggle_button_get_active(widget *gtkWidget) bool {
+func gtk_toggle_button_get_active(widget *C.GtkWidget) bool {
 	return fromgbool(C.gtk_toggle_button_get_active(togtktogglebutton(widget)))
 }
 
-func gtk_combo_box_text_new() *gtkWidget {
+func gtk_combo_box_text_new() *C.GtkWidget {
-	return fromgtkwidget(C.gtk_combo_box_text_new())
+	return C.gtk_combo_box_text_new()
 }
 
-func gtk_combo_box_text_new_with_entry() *gtkWidget {
+func gtk_combo_box_text_new_with_entry() *C.GtkWidget {
-	return fromgtkwidget(C.gtk_combo_box_text_new_with_entry())
+	return C.gtk_combo_box_text_new_with_entry()
 }
 
-func gtk_combo_box_text_get_active_text(widget *gtkWidget) string {
+func gtk_combo_box_text_get_active_text(widget *C.GtkWidget) string {
 	return C.GoString(fromgchar(C.gtk_combo_box_text_get_active_text(togtkcombobox(widget))))
 }
 
-func gtk_combo_box_text_append_text(widget *gtkWidget, text string) {
+func gtk_combo_box_text_append_text(widget *C.GtkWidget, text string) {
 	ctext := C.CString(text)
 	defer C.free(unsafe.Pointer(ctext))
 	C.gtk_combo_box_text_append_text(togtkcombobox(widget), togchar(ctext))
 }
 
-func gtk_combo_box_text_insert_text(widget *gtkWidget, index int, text string) {
+func gtk_combo_box_text_insert_text(widget *C.GtkWidget, index int, text string) {
 	ctext := C.CString(text)
 	defer C.free(unsafe.Pointer(ctext))
 	C.gtk_combo_box_text_insert_text(togtkcombobox(widget), C.gint(index), togchar(ctext))
 }
 
-func gtk_combo_box_get_active(widget *gtkWidget) int {
+func gtk_combo_box_get_active(widget *C.GtkWidget) int {
 	cb := (*C.GtkComboBox)(unsafe.Pointer(widget))
 	return int(C.gtk_combo_box_get_active(cb))
 }
 
-func gtk_combo_box_text_remove(widget *gtkWidget, index int) {
+func gtk_combo_box_text_remove(widget *C.GtkWidget, index int) {
 	C.gtk_combo_box_text_remove(togtkcombobox(widget), C.gint(index))
 }
 
-func gtkComboBoxLen(widget *gtkWidget) int {
+func gtkComboBoxLen(widget *C.GtkWidget) int {
 	cb := (*C.GtkComboBox)(unsafe.Pointer(widget))
 	model := C.gtk_combo_box_get_model(cb)
 	// this is the same as with a Listbox so
 	return gtkTreeModelListLen(model)
 }
 
-func gtk_entry_new() *gtkWidget {
+func gtk_entry_new() *C.GtkWidget {
-	return fromgtkwidget(C.gtk_entry_new())
+	return C.gtk_entry_new()
 }
 
-func gtkPasswordEntryNew() *gtkWidget {
+func gtkPasswordEntryNew() *C.GtkWidget {
 	e := gtk_entry_new()
 	C.gtk_entry_set_visibility(togtkentry(e), C.FALSE)
 	return e
 }
 
-func gtk_entry_set_text(widget *gtkWidget, text string) {
+func gtk_entry_set_text(widget *C.GtkWidget, text string) {
 	ctext := C.CString(text)
 	defer C.free(unsafe.Pointer(ctext))
 	C.gtk_entry_set_text(togtkentry(widget), togchar(ctext))
 }
 
-func gtk_entry_get_text(widget *gtkWidget) string {
+func gtk_entry_get_text(widget *C.GtkWidget) string {
 	return C.GoString(fromgchar(C.gtk_entry_get_text(togtkentry(widget))))
 }
 
 var _emptystring = [1]C.gchar{0}
 var emptystring = &_emptystring[0]
 
-func gtk_label_new() *gtkWidget {
+func gtk_label_new() *C.GtkWidget {
-	return fromgtkwidget(C.gtk_label_new(emptystring))
+	return C.gtk_label_new(emptystring)
 	// TODO left-justify?
 }
 
-func gtk_label_set_text(widget *gtkWidget, text string) {
+func gtk_label_set_text(widget *C.GtkWidget, text string) {
 	ctext := C.CString(text)
 	defer C.free(unsafe.Pointer(ctext))
 	C.gtk_label_set_text(togtklabel(widget), togchar(ctext))
 }
 
-func gtk_label_get_text(widget *gtkWidget) string {
+func gtk_label_get_text(widget *C.GtkWidget) string {
 	return C.GoString(fromgchar(C.gtk_label_get_text(togtklabel(widget))))
 }
 
-func gtk_widget_get_preferred_size(w *gtkWidget) (minWidth int, minHeight int, natWidth int, natHeight int) {
+func gtk_widget_get_preferred_size(widget *C.GtkWidget) (minWidth int, minHeight int, natWidth int, natHeight int) {
 	var minimum, natural C.GtkRequisition
 
-	C.gtk_widget_get_preferred_size(togtkwidget(w), &minimum, &natural)
+	C.gtk_widget_get_preferred_size(widget, &minimum, &natural)
 	return int(minimum.width), int(minimum.height),
 		int(natural.width), int(natural.height)
 }
 
-func gtk_progress_bar_new() *gtkWidget {
+func gtk_progress_bar_new() *C.GtkWidget {
-	return fromgtkwidget(C.gtk_progress_bar_new())
+	return C.gtk_progress_bar_new()
 }
 
-func gtk_progress_bar_set_fraction(w *gtkWidget, percent int) {
+func gtk_progress_bar_set_fraction(w *C.GtkWidget, percent int) {
 	p := C.gdouble(percent) / 100
 	C.gtk_progress_bar_set_fraction(togtkprogressbar(w), p)
 }
 
-func gtk_progress_bar_pulse(w *gtkWidget) {
+func gtk_progress_bar_pulse(w *C.GtkWidget) {
 	C.gtk_progress_bar_pulse(togtkprogressbar(w))
 }

gtkcasts_unix.go

@@ -28,14 +28,6 @@ func togbool(b bool) C.gboolean {
 	return C.FALSE
 }
 
-func fromgtkwidget(x *C.GtkWidget) *gtkWidget {
-	return (*gtkWidget)(unsafe.Pointer(x))
-}
-
-func togtkwidget(what *gtkWidget) *C.GtkWidget {
-	return (*C.GtkWidget)(unsafe.Pointer(what))
-}
-
 // TODO wrap in C.GoString()?
 func fromgchar(what *C.gchar) *C.char {
 	return (*C.char)(unsafe.Pointer(what))
@@ -45,74 +37,74 @@ func togchar(what *C.char) *C.gchar {
 	return (*C.gchar)(unsafe.Pointer(what))
 }
 
-func fromgtkwindow(x *C.GtkWindow) *gtkWidget {
+func fromgtkwindow(x *C.GtkWindow) *C.GtkWidget {
-	return (*gtkWidget)(unsafe.Pointer(x))
+	return (*C.GtkWidget)(unsafe.Pointer(x))
 }
 
-func togtkwindow(what *gtkWidget) *C.GtkWindow {
+func togtkwindow(what *C.GtkWidget) *C.GtkWindow {
 	return (*C.GtkWindow)(unsafe.Pointer(what))
 }
 
-func fromgtkcontainer(x *C.GtkContainer) *gtkWidget {
+func fromgtkcontainer(x *C.GtkContainer) *C.GtkWidget {
-	return (*gtkWidget)(unsafe.Pointer(x))
+	return (*C.GtkWidget)(unsafe.Pointer(x))
 }
 
-func togtkcontainer(what *gtkWidget) *C.GtkContainer {
+func togtkcontainer(what *C.GtkWidget) *C.GtkContainer {
 	return (*C.GtkContainer)(unsafe.Pointer(what))
 }
 
-func fromgtklayout(x *C.GtkLayout) *gtkWidget {
+func fromgtklayout(x *C.GtkLayout) *C.GtkWidget {
-	return (*gtkWidget)(unsafe.Pointer(x))
+	return (*C.GtkWidget)(unsafe.Pointer(x))
 }
 
-func togtklayout(what *gtkWidget) *C.GtkLayout {
+func togtklayout(what *C.GtkWidget) *C.GtkLayout {
 	return (*C.GtkLayout)(unsafe.Pointer(what))
 }
 
-func fromgtkbutton(x *C.GtkButton) *gtkWidget {
+func fromgtkbutton(x *C.GtkButton) *C.GtkWidget {
-	return (*gtkWidget)(unsafe.Pointer(x))
+	return (*C.GtkWidget)(unsafe.Pointer(x))
 }
 
-func togtkbutton(what *gtkWidget) *C.GtkButton {
+func togtkbutton(what *C.GtkWidget) *C.GtkButton {
 	return (*C.GtkButton)(unsafe.Pointer(what))
 }
 
-func fromgtktogglebutton(x *C.GtkToggleButton) *gtkWidget {
+func fromgtktogglebutton(x *C.GtkToggleButton) *C.GtkWidget {
-	return (*gtkWidget)(unsafe.Pointer(x))
+	return (*C.GtkWidget)(unsafe.Pointer(x))
 }
 
-func togtktogglebutton(what *gtkWidget) *C.GtkToggleButton {
+func togtktogglebutton(what *C.GtkWidget) *C.GtkToggleButton {
 	return (*C.GtkToggleButton)(unsafe.Pointer(what))
 }
 
-func fromgtkcombobox(x *C.GtkComboBoxText) *gtkWidget {
+func fromgtkcombobox(x *C.GtkComboBoxText) *C.GtkWidget {
-	return (*gtkWidget)(unsafe.Pointer(x))
+	return (*C.GtkWidget)(unsafe.Pointer(x))
 }
 
-func togtkcombobox(what *gtkWidget) *C.GtkComboBoxText {
+func togtkcombobox(what *C.GtkWidget) *C.GtkComboBoxText {
 	return (*C.GtkComboBoxText)(unsafe.Pointer(what))
 }
 
-func fromgtkentry(x *C.GtkEntry) *gtkWidget {
+func fromgtkentry(x *C.GtkEntry) *C.GtkWidget {
-	return (*gtkWidget)(unsafe.Pointer(x))
+	return (*C.GtkWidget)(unsafe.Pointer(x))
 }
 
-func togtkentry(what *gtkWidget) *C.GtkEntry {
+func togtkentry(what *C.GtkWidget) *C.GtkEntry {
 	return (*C.GtkEntry)(unsafe.Pointer(what))
 }
 
-func fromgtklabel(x *C.GtkLabel) *gtkWidget {
+func fromgtklabel(x *C.GtkLabel) *C.GtkWidget {
-	return (*gtkWidget)(unsafe.Pointer(x))
+	return (*C.GtkWidget)(unsafe.Pointer(x))
 }
 
-func togtklabel(what *gtkWidget) *C.GtkLabel {
+func togtklabel(what *C.GtkWidget) *C.GtkLabel {
 	return (*C.GtkLabel)(unsafe.Pointer(what))
 }
 
-func fromgtkprogressbar(x *C.GtkProgressBar) *gtkWidget {
+func fromgtkprogressbar(x *C.GtkProgressBar) *C.GtkWidget {
-	return (*gtkWidget)(unsafe.Pointer(x))
+	return (*C.GtkWidget)(unsafe.Pointer(x))
 }
 
-func togtkprogressbar(what *gtkWidget) *C.GtkProgressBar {
+func togtkprogressbar(what *C.GtkWidget) *C.GtkProgressBar {
 	return (*C.GtkProgressBar)(unsafe.Pointer(what))
 }

listbox_unix.go

@@ -53,23 +53,23 @@ and the GTK+ reference documentation.
 // }
 import "C"
 
-func fromgtktreemodel(x *C.GtkTreeModel) *gtkWidget {
+func fromgtktreemodel(x *C.GtkTreeModel) *C.GtkWidget {
-	return (*gtkWidget)(unsafe.Pointer(x))
+	return (*C.GtkWidget)(unsafe.Pointer(x))
 }
 
-func togtktreemodel(what *gtkWidget) *C.GtkTreeModel {
+func togtktreemodel(what *C.GtkWidget) *C.GtkTreeModel {
 	return (*C.GtkTreeModel)(unsafe.Pointer(what))
 }
 
-func fromgtktreeview(x *C.GtkTreeView) *gtkWidget {
+func fromgtktreeview(x *C.GtkTreeView) *C.GtkWidget {
-	return (*gtkWidget)(unsafe.Pointer(x))
+	return (*C.GtkWidget)(unsafe.Pointer(x))
 }
 
-func togtktreeview(what *gtkWidget) *C.GtkTreeView {
+func togtktreeview(what *C.GtkWidget) *C.GtkTreeView {
 	return (*C.GtkTreeView)(unsafe.Pointer(what))
 }
 
-func gListboxNew(multisel bool) *gtkWidget {
+func gListboxNew(multisel bool) *C.GtkWidget {
 	store := C.gtkListStoreNew()
 	widget := C.gtk_tree_view_new_with_model((*C.GtkTreeModel)(unsafe.Pointer(store)))
 	tv := (*C.GtkTreeView)(unsafe.Pointer(widget))
@@ -84,23 +84,23 @@ func gListboxNew(multisel bool) *gtkWidget {
 	C.gtk_tree_selection_set_mode(C.gtk_tree_view_get_selection(tv), C.GtkSelectionMode(sel))
 	scrollarea := C.gtk_scrolled_window_new((*C.GtkAdjustment)(nil), (*C.GtkAdjustment)(nil))
 	C.gtk_container_add((*C.GtkContainer)(unsafe.Pointer(scrollarea)), widget)
-	return fromgtkwidget(scrollarea)
+	return scrollarea
 }
 
-func gListboxNewSingle() *gtkWidget {
+func gListboxNewSingle() *C.GtkWidget {
 	return gListboxNew(false)
 }
 
-func gListboxNewMulti() *gtkWidget {
+func gListboxNewMulti() *C.GtkWidget {
 	return gListboxNew(true)
 }
 
-func getTreeViewFrom(widget *gtkWidget) *C.GtkTreeView {
+func getTreeViewFrom(widget *C.GtkWidget) *C.GtkTreeView {
 	wid := C.gtk_bin_get_child((*C.GtkBin)(unsafe.Pointer(widget)))
 	return (*C.GtkTreeView)(unsafe.Pointer(wid))
 }
 
-func gListboxText(widget *gtkWidget) string {
+func gListboxText(widget *C.GtkWidget) string {
 	var model *C.GtkTreeModel
 	var iter C.GtkTreeIter
 	var gs *C.gchar
@@ -114,7 +114,7 @@ func gListboxText(widget *gtkWidget) string {
 	return C.GoString(fromgchar(gs))
 }
 
-func gListboxAppend(widget *gtkWidget, what string) {
+func gListboxAppend(widget *C.GtkWidget, what string) {
 	var iter C.GtkTreeIter
 
 	tv := getTreeViewFrom(widget)
@@ -125,7 +125,7 @@ func gListboxAppend(widget *gtkWidget, what string) {
 	C.gtkListStoreSet(ls, &iter, cwhat)
 }
 
-func gListboxInsert(widget *gtkWidget, index int, what string) {
+func gListboxInsert(widget *C.GtkWidget, index int, what string) {
 	var iter C.GtkTreeIter
 
 	tv := getTreeViewFrom(widget)
@@ -136,7 +136,7 @@ func gListboxInsert(widget *gtkWidget, index int, what string) {
 	C.gtkListStoreSet(ls, &iter, cwhat)
 }
 
-func gListboxSelectedMulti(widget *gtkWidget) (indices []int) {
+func gListboxSelectedMulti(widget *C.GtkWidget) (indices []int) {
 	var model *C.GtkTreeModel
 
 	tv := getTreeViewFrom(widget)
@@ -158,7 +158,7 @@ func gListboxSelectedMulti(widget *gtkWidget) (indices []int) {
 	return indices
 }
 
-func gListboxSelMultiTexts(widget *gtkWidget) (texts []string) {
+func gListboxSelMultiTexts(widget *C.GtkWidget) (texts []string) {
 	var model *C.GtkTreeModel
 	var iter C.GtkTreeIter
 	var gs *C.gchar
@@ -185,7 +185,7 @@ func gListboxSelMultiTexts(widget *gtkWidget) (texts []string) {
 	return texts
 }
 
-func gListboxDelete(widget *gtkWidget, index int) {
+func gListboxDelete(widget *C.GtkWidget, index int) {
 	var iter C.GtkTreeIter
 
 	tv := getTreeViewFrom(widget)
@@ -203,7 +203,7 @@ func gtkTreeModelListLen(model *C.GtkTreeModel) int {
 	return int(C.gtk_tree_model_iter_n_children(model, (*C.GtkTreeIter)(nil)))
 }
 
-func gListboxLen(widget *gtkWidget) int {
+func gListboxLen(widget *C.GtkWidget) int {
 	tv := getTreeViewFrom(widget)
 	model := C.gtk_tree_view_get_model(tv)
 	return gtkTreeModelListLen(model)

sysdata_unix.go

@@ -8,29 +8,33 @@ import (
 	"time"
 )
 
+// #cgo pkg-config: gtk+-3.0
+// #include "gtk_unix.h"
+import "C"
+
 type sysData struct {
 	cSysData
 
-	widget		*gtkWidget
+	widget		*C.GtkWidget
-	container		*gtkWidget	// for moving
+	container		*C.GtkWidget	// for moving
 	pulse		chan bool		// for sysData.progressPulse()
 }
 
 type classData struct {
-	make	func() *gtkWidget
+	make	func() *C.GtkWidget
-	makeAlt	func() *gtkWidget
+	makeAlt	func() *C.GtkWidget
-	setText	func(widget *gtkWidget, text string)
+	setText	func(widget *C.GtkWidget, text string)
-	text		func(widget *gtkWidget) string
+	text		func(widget *C.GtkWidget) string
-	append	func(widget *gtkWidget, text string)
+	append	func(widget *C.GtkWidget, text string)
-	insert	func(widget *gtkWidget, index int, text string)
+	insert	func(widget *C.GtkWidget, index int, text string)
-	selected	func(widget *gtkWidget) int
+	selected	func(widget *C.GtkWidget) int
-	selMulti	func(widget *gtkWidget) []int
+	selMulti	func(widget *C.GtkWidget) []int
-	smtexts	func(widget *gtkWidget) []string
+	smtexts	func(widget *C.GtkWidget) []string
-	delete	func(widget *gtkWidget, index int)
+	delete	func(widget *C.GtkWidget, index int)
-	len		func(widget *gtkWidget) int
+	len		func(widget *C.GtkWidget) int
 	// ...
 	signals	callbackMap
-	child		func(widget *gtkWidget) *gtkWidget
+	child		func(widget *C.GtkWidget) *C.GtkWidget
 	childsigs	callbackMap
 }
 
@@ -110,7 +114,7 @@ var classTypes = [nctypes]*classData{
 
 func (s *sysData) make(initText string, window *sysData) error {
 	ct := classTypes[s.ctype]
-	ret := make(chan *gtkWidget)
+	ret := make(chan *C.GtkWidget)
 	defer close(ret)
 	uitask <- func() {
 		if s.alternate {