Re: How to set the size of a combo box?

[cecashon aol com]

Hi Lars,

There are a few things that you can try to see if you can get the combo box to format how you want it. The 
first is to create the combo with gtk_combo_box_new_with_model(). That way you can setup your cell renderer 
and be able to set properties of how the combo box is going to be rendered. To help with the placement of the 
combo box widget you can use the widget expand and align functions. If you put the combo box in a box 
container then you have a few more things you can use for getting the alignment correct.

Eric


//gcc -Wall combo_size1.c -o combo_size1 `pkg-config --cflags --libs gtk+-3.0`

#include<gtk/gtk.h>

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

    GtkWidget *window=gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title(GTK_WINDOW(window), "Combo Size");
    gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
    gtk_window_set_default_size(GTK_WINDOW(window), 400, 100);
    g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);

    GtkTreeIter iter;
    GtkListStore *store=gtk_list_store_new(1, G_TYPE_STRING);
    gtk_list_store_append(store, &iter);
    gtk_list_store_set(store, &iter, 0, "Arial 20", -1);
    gtk_list_store_append(store, &iter);
    gtk_list_store_set(store, &iter, 0, "Arial 20, an extra long line to clip", -1);

    GtkCellRenderer *renderer=gtk_cell_renderer_text_new();
    g_object_set(renderer, "height", 30, "width", 200, "font", "Arial 20", NULL);

    GtkWidget *combo=gtk_combo_box_new_with_model(GTK_TREE_MODEL(store));
    gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(combo), renderer, TRUE);
    gtk_widget_set_hexpand(combo, FALSE);
    gtk_widget_set_vexpand(combo, FALSE);
    gtk_widget_set_halign(combo, GTK_ALIGN_END);
    gtk_combo_box_set_active(GTK_COMBO_BOX(combo), 0);
    gtk_cell_layout_set_attributes(GTK_CELL_LAYOUT(combo), GTK_CELL_RENDERER(renderer), "text", 0, NULL);

    g_object_unref(G_OBJECT(store));

    GtkWidget *box=gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);
    gtk_box_pack_start(GTK_BOX(box), combo, FALSE, FALSE, 0);
    gtk_container_add(GTK_CONTAINER(window), box);
   
    gtk_widget_show_all(window);
    gtk_main();
    return 0;   
  }