having a small issue just displaying an image with C++ and GLADE - c++

Question

I know I am missing something really simple here, but all I am trying to do is display a image from a jpg file on a glade form statically w/o a file chooser, here is my code so far, any help would be great.
#include <gtk/gtk.h>
typedef struct {
GtkWidget *w_dlg_file_choose; // Pointer to file chooser dialog box
GtkWidget *w_img_main; // Pointer to image widget
GtkWidget *image;
} app_widgets;
gchar *file_name = "image1.jpg"; // Name of file to open from dialog box
// image = gtk_image_new_from_file ("splash1.jpg");
int main(int argc, char *argv[]) {
GtkBuilder *builder;
GtkWidget *window;
app_widgets *widgets = g_slice_new(app_widgets);
// gchar *file_name = "file.jpg"; // Name of file to open
gtk_init(&argc, &argv);
// image = gtk_image_new_from_file ("splash1.jpg");
builder = gtk_builder_new_from_file("glade/window_main.glade");
window = GTK_WIDGET(gtk_builder_get_object(builder, "window_main"));
widgets->w_dlg_file_choose = GTK_WIDGET(gtk_builder_get_object(builder, "dlg_file_choose"));
widgets->w_img_main = GTK_WIDGET(gtk_builder_get_object(builder, "img_main"));
gtk_builder_connect_signals(builder, widgets);
//image = gtk_image_new_from_file ("myfile.png");
// gtk_image_set_from_file(GTK_IMAGE(app_wdgts->w_img_main), file_name);
g_object_unref(builder);
gtk_widget_show(window);
gtk_main();
g_slice_free(app_widgets, widgets);
return 0;
}
//////////- GUI Button-Signals-"no dragons here" - ///////////////////////////
/////////////////////////////////////////////////////////////////
// Event hanlders. Must be extern "C"
// File --> Open
void on_info_btn_clicked() {
gtk_main_quit();
}
// called when window is closed
void on_window_main_destroy() {
gtk_main_quit();
}