1 files changed, 116 insertions, 0 deletions
diff --git a/gtkcalls_unix.go b/gtkcalls_unix.go
new file mode 100644
index 0000000..d09fd61
--- /dev/null
+++ b/gtkcalls_unix.go
@@ -0,0 +1,116 @@
+// +build !windows,!darwin,!plan9
+// TODO is there a way to simplify the above? :/
+
+// 16 february 2014
+package main
+
+import (
+	"fmt"
+	"unsafe"
+	"reflect"
+)
+
+// #cgo pkg-config: gtk+-3.0
+// #include <stdlib.h>
+// #include <gtk/gtk.h>
+// /* because cgo is flaky with macros */
+// static inline void gSignalConnect(GtkWidget *widget, char *signal, GCallback callback, void *data) { g_signal_connect(widget, signal, callback, data); }
+// /* so we can call uistep */
+// extern gboolean our_thread_callback(gpointer);
+import "C"
+
+type (
+	gtkWidget C.GtkWidget
+)
+
+func fromgbool(b C.gboolean) bool {
+	return b != C.FALSE
+}
+
+func togbool(b bool) C.gboolean {
+	if b {
+		return C.TRUE
+	}
+	return C.FALSE
+}
+
+//export our_thread_callback
+func our_thread_callback(C.gpointer) C.gboolean {
+	uistep()
+	return C.TRUE
+}
+
+func gtk_init() bool {
+	// TODO allow GTK+ standard command-line argument processing
+	b := fromgbool(C.gtk_init_check((*C.int)(nil), (***C.char)(nil)))
+	if !b {
+		return false
+	}
+	// thanks to tristan in irc.gimp.net/#gtk
+	C.gdk_threads_add_idle(C.GSourceFunc(C.our_thread_callback), C.gpointer(unsafe.Pointer(nil)))
+	return true
+}
+
+func gtk_main() {
+	C.gtk_main()
+}
+
+func gtk_window_new() *gtkWidget {
+	// 0 == GTK_WINDOW_TOPLEVEL (the only other type, _POPUP, should not be used)
+	return (*gtkWidget)(unsafe.Pointer(C.gtk_window_new(0)))
+}
+
+// because *gtkWidget and *C.GtkWidget are not compatible
+func gtkwidget(g *gtkWidget) (*C.GtkWidget) {
+	return (*C.GtkWidget)(unsafe.Pointer(g))
+}
+
+// TODO do we need the argument?
+// TODO fine-tune the function type
+func g_signal_connect(obj *gtkWidget, sig string, callback interface{}) {
+	v := reflect.ValueOf(callback)
+	if v.Kind() != reflect.Func {
+		panic(fmt.Sprintf("UI library internal error: callback %v given to g_signal_connect not a function", v))
+	}
+	ccallback := C.GCallback(unsafe.Pointer(v.Pointer()))
+	csig := C.CString(sig)
+	defer C.free(unsafe.Pointer(csig))
+	C.gSignalConnect(gtkwidget(obj), csig, ccallback, unsafe.Pointer(nil))
+}
+
+// TODO ensure this works if called on an individual control
+func gtk_widget_show(widget *gtkWidget) {
+	C.gtk_widget_show_all(gtkwidget(widget))
+}
+
+func gtk_widget_hide(widget *gtkWidget) {
+	C.gtk_widget_hide(gtkwidget(widget))
+}
+
+func gtk_window_set_title(window *gtkWidget, title string) {
+	ctitle := C.CString(title)
+	defer C.free(unsafe.Pointer(ctitle))
+	C.gtk_window_set_title((*C.GtkWindow)(unsafe.Pointer(window)),
+		(*C.gchar)(unsafe.Pointer(ctitle)))
+}
+
+func gtk_window_resize(window *gtkWidget, width int, height int) {
+	C.gtk_window_resize((*C.GtkWindow)(unsafe.Pointer(window)), C.gint(width), C.gint(height))
+}
+
+func gtk_fixed_new() *gtkWidget {
+	return (*gtkWidget)(unsafe.Pointer(C.gtk_fixed_new()))
+}
+
+func gtk_container_add(container *gtkWidget, widget *gtkWidget) {
+	C.gtk_container_add((*C.GtkContainer)(unsafe.Pointer(container)), gtkwidget(widget))
+}
+
+func gtk_fixed_put(container *gtkWidget, widget *gtkWidget, x int, y int) {
+	C.gtk_fixed_put((*C.GtkFixed)(unsafe.Pointer(container)), gtkwidget(widget),
+		C.gint(x), C.gint(y))
+}
+
+func gtk_widget_set_size_request(widget *gtkWidget, width int, height int) {
+	C.gtk_widget_set_size_request(gtkwidget(widget), C.gint(width), C.gint(height))
+}