Help whith image handling

papageorge · **Joined:** Sat Dec 01, 2007 2:45 am **Posts:** 2

Hello,

I want to handle an image click. In order to do it i used an event_box. Except the image I would like to pass an other variable ( array a ) but the following code is not working correctly.Could you please help me because i am new to gtk? (Sorry if my code is a litle bit messy :))

Code:

#include <iostream>
#include <gtk/gtk.h>

void print(GtkEventBox *less,gpointer *hap,GtkWidget *one,int a[]){
gtk_image_set_from_file(GTK_IMAGE(one),"x.jpg");
std::cout << a[1];
}

int main( int   argc,
          char *argv[] )
{
GtkWidget *one;
GtkWidget *event_box;
GtkWidget *window;

int a[2];
a[1]=1;
a[2]=2;

gtk_init (&argc, &argv);

window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
one = gtk_image_new_from_file ("blank.jpg");
event_box = gtk_event_box_new ();


gtk_widget_add_events(event_box, GDK_BUTTON_PRESS_MASK);
gtk_container_add (GTK_CONTAINER (event_box), one);
g_signal_connect (G_OBJECT (event_box), 
                      "button_release_event",
                      G_CALLBACK (print),
                      one);

gtk_container_add (GTK_CONTAINER (window), event_box);
gtk_widget_show_all (window);
gtk_main ();
    
    return 0;

}

Thank you.

Micah Carrick · **Posted:** Sat Dec 01, 2007 6:02 pm

Do you mean that you want to pass 2 variables, the array 'a' and the GtkImage 'one' to the callback funtion? We often use a struct for this (or create an object or widget if applicable).

Also, you might want to call gtk_main_quit on the window's destroy event.

Code:

#include <iostream>
#include <gtk/gtk.h>

typedef struct
{
        int             a[2];
        GtkWidget       *one;
} MyStruct;

void print (GtkWidget *widget, GdkEventButton *event, gpointer user_data)
{
        MyStruct        *s;
        
        s = (MyStruct *)user_data;
        
        gtk_image_set_from_file(GTK_IMAGE(s->one),"x.jpg");
        std::cout << s->a[1];
}

int main (int   argc, char *argv[])
{
        GtkWidget       *event_box;
        GtkWidget       *window;
        MyStruct        *s;
        
        s = g_slice_new (MyStruct);
        
        s->a[1]=1;
        s->a[2]=2;

        gtk_init (&argc, &argv);

        window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
        s->one = gtk_image_new_from_file ("blank.jpg");
        event_box = gtk_event_box_new ();


        gtk_widget_add_events(event_box, GDK_BUTTON_PRESS_MASK);
        gtk_container_add (GTK_CONTAINER (event_box), s->one);
        
        /* call gtk_main_quit() when window is destroyed */
        g_signal_connect (G_OBJECT (window),
                              "destroy",
                              G_CALLBACK (gtk_main_quit),
                              NULL);
                              
        g_signal_connect (G_OBJECT (event_box),
                              "button_release_event",
                              G_CALLBACK (print),
                              s);

        gtk_container_add (GTK_CONTAINER (window), event_box);
        gtk_widget_show_all (window);
        gtk_main ();
   
        return 0;

} 

papageorge · **Joined:** Sat Dec 01, 2007 2:45 am **Posts:** 2

thank you very much for your anser. If only you could help me with something else.... :)

Actualy, I had made a tic-tac-toe game which runs in terminal and i want to make it gtk. In this code I used a function named print in which I ask from the user to give me the position in which he would like to play. Can I do sth in order to stop the program when the user is about to play and continue only if the user clicks on a button...

tnx

Micah Carrick · **Posted:** Tue Dec 04, 2007 3:11 pm

I don't understand the question

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