making a vending machine out of GTK - gtk

Question

#include "UI.h"
GtkWidget* create_main_frame(gint wid, gint hgt)
{
GtkWidget* main_frame = gtk_window_new(GTK_WINDOW_TOPLEVEL);
/* window attributes */
gtk_window_set_title( GTK_WINDOW(main_frame), "Welcome!!" );
gtk_window_set_default_size( GTK_WINDOW(main_frame), wid, hgt );
/* signals */
g_signal_connect(main_frame, "destroy", G_CALLBACK(gtk_main_quit), NULL);
return main_frame;
}
GtkWidget* create_scrolled_window(void)
{
GtkWidget* scrolled_window = gtk_scrolled_window_new(NULL, NULL);
gtk_scrolled_window_set_policy( GTK_SCROLLED_WINDOW(scrolled_window), GTK_POLICY_AUTOMATIC, GTK_POLICY_ALWAYS );
gtk_container_set_border_width( GTK_CONTAINER(scrolled_window), 10 );
return scrolled_window;
}
GtkWidget* create_box(GtkOrientation orn, gint spc)
{
GtkWidget* box = gtk_box_new(orn, spc);
//gtk_container_set_border_width( GTK_CONTAINER(box), 5 );
return box;
}
GtkWidget* create_layout(guint wid, guint hgt)
{
GtkWidget* layout = gtk_layout_new(NULL, NULL);
gtk_layout_set_size( GTK_LAYOUT(layout), wid, hgt );
return layout;
}
GtkWidget* create_grid(guint rsp, guint csp)
{
GtkWidget* grid = gtk_grid_new();
gtk_grid_set_row_spacing( GTK_GRID(grid), rsp );
gtk_grid_set_column_spacing( GTK_GRID(grid), csp );
return grid;
}
/*
GtkWidget* create_token_button(Token* tkn)
{
char parsed_value[11];
char* string = parse_to_string(tkn -> value, parsed_value);
GtkWidget* button = gtk_button_new_with_label(value);
//gtk_signal_connect(button, "clicked", G_CALLBACK, );
return button;
}
*/
GtkWidget* create_commodity_button(Commodity* com)
{
GtkWidget* button = gtk_button_new_with_label(com -> name);
//gtk_signal_connect(button, "clicked", G_CALLBACK, );
return button;
}
#include "UI.h"
int main(int argc, char* argv[])
{
int i, j;
/* vending machine */
VendingMachine* vending_machine;
/* frames */
GtkWidget* main_frame;
GtkWidget* scrolled_window;
GtkWidget* commodity_box, * commodity_layout, * commodity_grid, * commodity_button;
/* initialize */
gtk_init(&argc, &argv);
make_new_vending_machine_memory(&vending_machine, sizeof(VendingMachine) );
boot_vending_machine(vending_machine, 13, 13);
/* setting main frame */
main_frame = create_main_frame(1000, 750);
/* setting commodty frames and button table */
commodity_box = create_box(GTK_ORIENTATION_HORIZONTAL, 10);
scrolled_window = create_scrolled_window();
commodity_layout = create_layout(500, 700);
commodity_grid = create_grid(10, 10);
for (i = 0; i < 13; i++)
for (j = 0; j < 13; j++) {
commodity_button = create_commodity_button(&vending_machine -> commodity[i][j]);
gtk_grid_attach( GTK_GRID(commodity_grid), commodity_button, i * 300, j * 300, 5, 7 );
}
/* start adding and packing */
gtk_layout_put( GTK_LAYOUT(commodity_layout), commodity_grid, 10, 10 );
gtk_container_add( GTK_CONTAINER(scrolled_window), commodity_layout );
gtk_box_pack_start( GTK_BOX(commodity_box), scrolled_window, TRUE, TRUE, 10 );
gtk_container_add( GTK_CONTAINER(main_frame), commodity_box );
/* show all */
gtk_widget_show_all(main_frame);
gtk_main();
return 0;
}
I'm done writing the basic functions that are needed in my small vending machine project.
Now, I'm trying to make an UI out of the functions with GTK+. And I'm very confused since
this is the first time I'm actually using GTK.
I want a grid of commodity buttons that should be displayed on the left side, but I got
pretty much stuck on this part. What I'm trying to do is, since I "malloc"ed the commodities
for the purpose of adding and remove comms, I want a scroll bar attached to the comm window.
what I did as you can see in the source code
I made a grid of comm buttons and added on a layout widget.
I added the layout on a scrollbar widget
I added that scrollbar on a box and packed it.
I added that box to the main window.
the result is well "not satisfing"
I'm struggling through the GNOME official APIs
can somebody help me with this??

Answer 1

If you don't see how to create your user interface, give Glade a try. You'll be able to quickly try and see how the widgets fit together.