Pass parameters from ComboBox to GTKTreeView in C

Question

In C Language, how is it possible to pass the values in ComboBox to GtkTreeView? We have tried this code, but we do not know where to write the ids of ComboBox. What signals should be used in ComboBox?

   void on_btn_car_order_clicked(GtkButton *button, gpointer *user_data){
    GtkTreeIter iter;

    GtkTreeView *treeview_payment1 = GTK_TREE_VIEW(user_data);
    GtkListStore *liststore1 = GTK_LIST_STORE(gtk_tree_view_get_model(treeview_payment1));
    gtk_list_store_append(liststore1, &iter);
    gtk_list_store_set(liststore1, &iter, 0, "asdas" , 1, 1.0,2, 10.0, -1);    
    gtk_widget_hide (GTK_WIDGET(detail_window));
    gtk_widget_show(listree_window);     
}

GtkTreeView GtkWindow with ComboBox

Thank you, Best regards, Shak

A more detailed explanation of your requirement would be helpful.. Like when you want to pass combo box to treeview ?? — Siva Guru, Dec 13 '19 at 03:26
If you have a look in this picture (GtkWindow with ComboBox), you can see a button "Order". on_btn_car_order_clicked We tried passing the value in ComBox to Label and it works. — Shak Marifkhonov, Dec 13 '19 at 11:28
so on pressing order, you want to pass the data to the treeView and fill the table.If possible could you share your code.. it will be easier for me to suggest the changes. — Siva Guru, Dec 13 '19 at 13:06
Where can I send you my code, I dont think it will fit here.. — Shak Marifkhonov, Dec 13 '19 at 18:05
You could upload it in some online cloud storage site and give me permission to edit it. — Siva Guru, Dec 13 '19 at 18:36
https://drive.google.com/open?id=15yGSCFDBU1qaEIaJ7pqN-R8TfDGdIiqj — Shak Marifkhonov, Dec 13 '19 at 19:30

Siva Guru · Answer 1 · 2019-12-14T19:01:22.767

#include <gtk/gtk.h>

typedef struct
{
    GtkWidget *w_car_choose;
    GtkWidget *w_model_choose;
    GtkWidget *w_submit_button;
    GtkWidget *w_treeview;
} app_widgets;

GtkBuilder *builder;
GtkWidget *main_window;
GtkWidget *listtree_window;

void on_btn_submit_clicked(GtkButton *button, gpointer *user_data);

int main(int argc, char *argv[])
{

    app_widgets *widgets = g_slice_new(app_widgets);

    gtk_init(&argc, &argv);

    builder = gtk_builder_new();
    gtk_builder_add_from_file(builder, "test.glade", NULL);

    main_window = GTK_WIDGET(gtk_builder_get_object(builder, "main_window"));
    listtree_window = GTK_WIDGET(gtk_builder_get_object(builder, "listtree_window"));


    // get pointers to widgets
    widgets->w_treeview = GTK_WIDGET(gtk_builder_get_object(builder, "treeview"));
    widgets->w_car_choose = GTK_WIDGET(gtk_builder_get_object(builder, "car_choose"));
    widgets->w_model_choose = GTK_WIDGET(gtk_builder_get_object(builder, "model_choose"));
    widgets->w_submit_button = GTK_WIDGET(gtk_builder_get_object(builder, "btn_submit"));
    gtk_combo_box_set_active(GTK_COMBO_BOX(widgets->w_car_choose), 1);
    gtk_combo_box_set_active(GTK_COMBO_BOX(widgets->w_model_choose), 1);

    gtk_builder_connect_signals(builder, widgets);

    g_object_unref(builder);

    gtk_widget_show(main_window);

    g_signal_connect(GTK_WIDGET(widgets->w_submit_button), "clicked", G_CALLBACK(on_btn_submit_clicked), widgets);

    gtk_main();
    g_slice_free(app_widgets, widgets);

    return 0;
}

void on_btn_submit_clicked(GtkButton *button, gpointer *user_data)
{
    app_widgets *widgets = user_data;

    GtkTreeIter iter;
    GtkListStore *liststore = GTK_LIST_STORE(gtk_tree_view_get_model(GTK_TREE_VIEW(widgets->w_treeview)));
    gtk_list_store_append(liststore, &iter);
    gtk_list_store_set(liststore, &iter, 0, gtk_combo_box_text_get_active_text(GTK_COMBO_BOX(widgets->w_model_choose)), 1, gtk_combo_box_text_get_active_text(GTK_COMBO_BOX(widgets->w_car_choose)), -1);

    gtk_widget_hide(GTK_WIDGET(main_window));
    gtk_widget_show(listtree_window);
}

// called when window is closed
void on_window_main_destroy()
{
    gtk_main_quit();
}

if you want to pass customized data during onClick signal then connect using

g_signal_connect

https://developer.gnome.org/gobject/stable/gobject-Signals.html. and generally, for connecting signals, you can manually connect it using g_connect as mostly during your program you might want to modify data's which will be stored in your struct so instead of using glade for it, you can manually connect.

#suggestions(if your actual program is gonna look like this). you could finish the above program in a single main window by adding an Add button to "listtree_window" window and making "main_window" a dialog box.

in your glade file remove "onclick" handler for submit button — Siva Guru, Dec 15 '19 at 08:26
int i = 0; char *p = strtok (car_name, " "); char *data[100]; while (p) { data[i++] = p; p = strtok (NULL, " "); } printf("PRINT VALUE FROM DATA[0]: %s\n", data[0]); gtk_list_store_set(liststore1, &iter, 0, data[0], 1, data[1], 2, data[2], 3, data[3], 4, data[4], 5, data[5], 6, data[6], 7, data[7], 8, data[8], 9, data[9], 10, data[10], -1); [rintf is working, while, gtk_list_store_set is not working. How can I fix this? — Shak Marifkhonov, Dec 15 '19 at 11:17
(https://developer.gnome.org/glib/stable/glib-String-Utility-Functions.html#g-strdup-printf) try using Glib string utility functions. strtok() is inherently unsafe (https://stackoverflow.com/questions/8957829/strtok-segmentation-fault) — Siva Guru, Dec 16 '19 at 05:15

Pass parameters from ComboBox to GTKTreeView in C

1 Answers1