another UI attempt, I guess.

sorry.

src/libui_sdl/libui/unix/checkbox.c

@@ -0,0 +1,78 @@
+// 10 june 2015
+#include "uipriv_unix.h"
+
+struct uiCheckbox {
+	uiUnixControl c;
+	GtkWidget *widget;
+	GtkButton *button;
+	GtkToggleButton *toggleButton;
+	GtkCheckButton *checkButton;
+	void (*onToggled)(uiCheckbox *, void *);
+	void *onToggledData;
+	gulong onToggledSignal;
+};
+
+uiUnixControlAllDefaults(uiCheckbox)
+
+static void onToggled(GtkToggleButton *b, gpointer data)
+{
+	uiCheckbox *c = uiCheckbox(data);
+
+	(*(c->onToggled))(c, c->onToggledData);
+}
+
+static void defaultOnToggled(uiCheckbox *c, void *data)
+{
+	// do nothing
+}
+
+char *uiCheckboxText(uiCheckbox *c)
+{
+	return uiUnixStrdupText(gtk_button_get_label(c->button));
+}
+
+void uiCheckboxSetText(uiCheckbox *c, const char *text)
+{
+	gtk_button_set_label(GTK_BUTTON(c->button), text);
+}
+
+void uiCheckboxOnToggled(uiCheckbox *c, void (*f)(uiCheckbox *, void *), void *data)
+{
+	c->onToggled = f;
+	c->onToggledData = data;
+}
+
+int uiCheckboxChecked(uiCheckbox *c)
+{
+	return gtk_toggle_button_get_active(c->toggleButton) != FALSE;
+}
+
+void uiCheckboxSetChecked(uiCheckbox *c, int checked)
+{
+	gboolean active;
+
+	active = FALSE;
+	if (checked)
+		active = TRUE;
+	// we need to inhibit sending of ::toggled because this WILL send a ::toggled otherwise
+	g_signal_handler_block(c->toggleButton, c->onToggledSignal);
+	gtk_toggle_button_set_active(c->toggleButton, active);
+	g_signal_handler_unblock(c->toggleButton, c->onToggledSignal);
+}
+
+uiCheckbox *uiNewCheckbox(const char *text)
+{
+	uiCheckbox *c;
+
+	uiUnixNewControl(uiCheckbox, c);
+
+	c->widget = gtk_check_button_new_with_label(text);
+	c->button = GTK_BUTTON(c->widget);
+	c->toggleButton = GTK_TOGGLE_BUTTON(c->widget);
+	c->checkButton = GTK_CHECK_BUTTON(c->widget);
+
+	c->onToggledSignal = g_signal_connect(c->widget, "toggled", G_CALLBACK(onToggled), c);
+	uiCheckboxOnToggled(c, defaultOnToggled, NULL);
+
+	return c;
+}