Creating and storing images with gtk2? - c

Question

I am having some trouble drawing images with gtk2. I have tried this code:
#include <gtk/gtk.h>
static gboolean button_press_callback (GtkWidget *event_box, GdkEventButton *event, gpointer data)
{
g_print ("Event box clicked at coordinates %f,%f\n",
event->x, event->y);
/* Returning TRUE means we handled the event, so the signal
* emission should be stopped (don't call any further
* callbacks that may be connected). Return FALSE
* to continue invoking callbacks.
*/
return TRUE;
}
static GtkWidget*
create_image (void)
{
GtkWidget *image;
GtkWidget *event_box;
image = gtk_image_new_from_file ("image.png");
}
int main(int argc, char const *argv[])
{
create_image();
return 0;
}
It will not draw any images onscreen, infact I don`t see any window at all. Also, what is the best way to store an image in a variable for future use?

Answer 1

I suggest you to look at the gtk tutorial https://developer.gnome.org/gtk-tutorial/stable/, a lot of things are missing for your code to display here a sample on how to display a simple picture in a window :
#include <gtk/gtk.h>
GtkWidget* create_gui()
{
GtkWidget *win = gtk_window_new(GTK_WINDOW_TOPLEVEL); // create the application window
GtkWidget *img = gtk_image_new_from_file("image.png"); // image shall be in the same dir
gtk_container_add(GTK_CONTAINER(win), img); // add the image to the window
g_signal_connect(G_OBJECT(win), "destroy", G_CALLBACK(gtk_main_quit), NULL); // end the application if user close the window
return win;
}
int main(int argc, char** argv) {
GtkWidget* win;
gtk_init(&argc, &argv);
win = create_gui();
gtk_widget_show_all(win); // display the window
gtk_main(); // start the event loop
return 0;
}
BTW, gtk 2 is no longer being maintained, I suggest you start with gtk3 if you can