Add a simple color chooser test

tests/testcolorchooser.c

@@ -0,0 +1,50 @@
+#include <gtk/gtk.h>
+
+static void
+color_changed (GObject *o, GParamSpec *pspect, gpointer data)
+{
+  GdkRGBA color;
+
+  gtk_color_chooser_get_color (GTK_COLOR_CHOOSER (o), &color);
+  g_print ("color changed: %g %g %g %g\n",
+           color.red, color.green, color.blue, color.alpha);
+}
+
+static void
+dialog_response (GtkDialog *dialog, gint response)
+{
+  GdkRGBA color;
+
+  switch (response)
+    {
+    case GTK_RESPONSE_OK:
+      gtk_color_chooser_get_color (GTK_COLOR_CHOOSER (dialog), &color);
+      g_print ("color accepted: %g %g %g %g\n",
+           color.red, color.green, color.blue, color.alpha);
+      break;
+    default:
+      g_print ("canceled\n");
+      break;
+    }
+
+  gtk_main_quit ();
+}
+
+int
+main (int argc, char *argv[])
+{
+  GtkWidget *dialog;
+
+  gtk_init (NULL, NULL);
+
+  dialog = gtk_color_chooser_dialog_new ("Select a color", NULL);
+  g_signal_connect (dialog, "notify::color", G_CALLBACK (color_changed), NULL);
+  g_signal_connect (dialog, "response", G_CALLBACK (dialog_response), NULL);
+
+  gtk_widget_show_all (dialog);
+
+  gtk_main ();
+
+  return 0;
+}
+