I have following code. where before any new addition to the combo box behaves properly that is changed event is generated only when an item is selected. however as soon as a new item is added to the list dynamically change event is generated merely by the movement of the mouse over the added items.
any ideas please!!!
attached is my code
it can be compiled by following commad g++ `pkg-config --cflags --libs gtk+-2.0` combobox_test.cpp
Munira Ahmed
#include <gtk/gtk.h>
#include <sstream>
#include <fstream>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <iostream>
using namespace std;
gboolean ComboboxTimeout(GtkComboBox *widget);
int DialogComboAcc(GtkComboBox *widget,gpointer user_data);
void CreateCombobox();
GtkTreeStore * m_TreeAcc;
GtkTreeModel * m_ModelAcc;
GtkCellRenderer * m_ModelRendererAcc;
GtkWidget * m_wComboboxAcc;
GtkWidget * m_Vbox;
GtkWidget * m_Hbox;
GtkTreeStore *treestore;
const int WINDOW_WIDTH = 200;
const int WINDOW_LENGTH = 400;
enum
{
COL_FIRST_NAME = 0,
COL_LAST_NAME,
COL_YEAR_BORN,
NUM_COLS
} ;
int main (int argc, char **argv)
{
GtkWidget *window;
GtkWidget *view;
gtk_init(&argc, &argv);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_title(GTK_WINDOW(window), "Combo Box Testing");
gtk_widget_set_size_request (GTK_WIDGET (window), WINDOW_WIDTH, WINDOW_LENGTH);
g_signal_connect(window, "delete_event", gtk_main_quit, NULL); /* dirty */
m_Vbox = gtk_vbox_new (false, 0);
gtk_container_add (GTK_CONTAINER (window), m_Vbox);
gtk_widget_show (m_Vbox);
m_Hbox = gtk_hbox_new (false, 0);
gtk_widget_show (m_Hbox);
gtk_box_pack_start (GTK_BOX (m_Vbox), m_Hbox, false, false, 0);
CreateCombobox();
gtk_box_pack_start (GTK_BOX (m_Hbox), m_wComboboxAcc, false, false, 0);
gtk_widget_show_all(window);
g_timeout_add(10,(GSourceFunc) ComboboxTimeout, NULL);
gtk_main();
return 0;
}
void CreateCombobox()
{
GtkTreeIter toplevel;
GtkTreeIter child;
m_TreeAcc = gtk_tree_store_new(1, G_TYPE_STRING);
m_ModelAcc = GTK_TREE_MODEL (m_TreeAcc);
m_ModelRendererAcc = gtk_cell_renderer_combo_new();
m_wComboboxAcc = gtk_combo_box_new_with_model(m_ModelAcc);
gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(m_wComboboxAcc), m_ModelRendererAcc, true);
gtk_cell_layout_set_attributes(GTK_CELL_LAYOUT(m_wComboboxAcc),
m_ModelRendererAcc,"text", 0, (gchar *)0);
g_signal_connect (G_OBJECT (GTK_COMBO_BOX (m_wComboboxAcc)),
"changed",G_CALLBACK (DialogComboAcc), NULL);
// g_signal_handler_block(GTK_COMBO_BOX (m_wComboboxAcc),m_iSignalIdAcc);
for (int i=0; i < 5 ; i++)
{
gtk_tree_store_append(GTK_TREE_STORE (m_TreeAcc), &toplevel, NULL);
gtk_tree_store_set(GTK_TREE_STORE (m_TreeAcc), &toplevel, 0, "Tulip", -1);
/* Create Child */
gtk_tree_store_append(GTK_TREE_STORE (m_TreeAcc), &child, &toplevel);
gtk_tree_store_set(GTK_TREE_STORE (m_TreeAcc), &child, 0, "Edit-Tulip",-1);
gtk_tree_store_append(GTK_TREE_STORE (m_TreeAcc), &child, &toplevel);
gtk_tree_store_set(GTK_TREE_STORE (m_TreeAcc), &child, 0, "Delete-Tulip",-1);
}
// g_signal_handler_unblock(GTK_COMBO_BOX (m_wComboboxAcc),m_iSignalIdAcc);
gtk_widget_show_all (m_wComboboxAcc);
}
int DialogComboAcc(GtkComboBox *widget,gpointer user_data)
{
GtkTreeIter toplevel;
GtkTreeIter child;
cout << "Under DialogComboAcc " << endl;
#if 0
// g_signal_handler_block(GTK_COMBO_BOX (m_wComboboxAcc),m_iSignalIdAcc);
for (int i=0; i < 1 ; i++)
{
gtk_tree_store_append(GTK_TREE_STORE (m_TreeAcc), &toplevel, NULL);
gtk_tree_store_set(GTK_TREE_STORE (m_TreeAcc), &toplevel, 0, "Green", -1);
/* Create - Child */
gtk_tree_store_append(GTK_TREE_STORE (m_TreeAcc), &child, &toplevel);
gtk_tree_store_set(GTK_TREE_STORE (m_TreeAcc), &child, 0, "Edit-Green",-1);
gtk_tree_store_append(GTK_TREE_STORE (m_TreeAcc), &child, &toplevel);
gtk_tree_store_set(GTK_TREE_STORE (m_TreeAcc), &child, 0, "Delete-Green",-1);
}
// g_signal_handler_unblock(GTK_COMBO_BOX (m_wComboboxAcc),m_iSignalIdAcc);
#endif
return false;
}
int ComboboxTimeout(GtkComboBox *widget)
{
GtkTreeIter toplevel;
GtkTreeIter child;
cout << "Under ComboboxTimeout " << endl;
//g_signal_handler_block(GTK_COMBO_BOX (m_wComboboxAcc),m_iSignalIdAcc);
for (int i=0; i < 3 ; i++)
{
gtk_tree_store_append(GTK_TREE_STORE (m_TreeAcc), &toplevel, NULL);
gtk_tree_store_set(GTK_TREE_STORE (m_TreeAcc), &toplevel, 0, "Auto", -1);
/* Create - Child */
gtk_tree_store_append(GTK_TREE_STORE (m_TreeAcc), &child, &toplevel);
gtk_tree_store_set(GTK_TREE_STORE (m_TreeAcc), &child, 0, "Edit-Auto",-1);
gtk_tree_store_append(GTK_TREE_STORE (m_TreeAcc), &child, &toplevel);
gtk_tree_store_set(GTK_TREE_STORE (m_TreeAcc), &child, 0, "Delete-Auto",-1);
}
//g_signal_handler_unblock(GTK_COMBO_BOX (m_wComboboxAcc),m_iSignalIdAcc);
return false;
}
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