main.c

用GTK实现的一个简单的计算器程序

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
/*
 * main.c
 * Copyright (C) Nick Z Liu 2008 <nick@>
 * 
 * main.c is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * main.c is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along
 * with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>

#include <config.h>

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

#include "mult.h"

#include "callbacks.h"

#include <dbus/dbus-glib.h>

#include <libosso.h>

#ifdef USE_LIBDBUS
extern int start_service (void);
#else
extern int start_service (osso_context_t* osso_context);
#endif

/* For testing propose use the local (not installed) glade file */
/* #define GLADE_FILE PACKAGE_DATA_DIR"/calculator/glade/calculator.glade" */
#define GLADE_FILE "calculator.glade"

GtkWidget*
create_window (void)
{
	GtkWidget *window;
	GladeXML *gxml;
	
	gxml = glade_xml_new (GLADE_FILE, NULL, NULL);
	
	/* This is important */
	glade_xml_signal_autoconnect (gxml);
	window = glade_xml_get_widget (gxml, "window");
	
	return window;
}

/* 按下关闭窗口按钮会发出delete_event*/
gint delete_event(GtkWidget *widget, GdkEvent *event, gpointer data)
{
    /* 如果你的 "delete_event" 信号处理函数返回 FALSE，GTK 会发出 "destroy" 信号。
     * 返回 TRUE，你不希望关闭窗口。
     * 当你想弹出“你确定要退出吗?”对话框时它很有用。*/
    g_print ("delete event occurred\n");

    /* 改 TRUE 为 FALSE 程序会关闭。*/
    return FALSE;
}

#ifdef USE_GLADE
void destroy( gpointer   data, GtkWidget *widget)
#else
void destroy( GtkWidget *widget, gpointer   data )
#endif
{
	g_print ("destroy event occurred\n");
    gtk_main_quit ();
}

int
main (int argc, char *argv[])
{
 	GtkWidget *window;
#ifndef USE_GLADE
 	GtkVBox* vbox;
 	GtkMenuBar* menubar;
    GtkMenuItem* menuitem_about;
 	GtkWidget *about_window = NULL;
 	GtkEntry* entry;
 	GtkTable* table;
 	GtkButton* button[5][4];
    gint i, j;
#endif
    osso_context_t* ossoContext = NULL;

#ifdef ENABLE_NLS
	bindtextdomain (GETTEXT_PACKAGE, PACKAGE_LOCALE_DIR);
	bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
	textdomain (GETTEXT_PACKAGE);
#endif

	gtk_set_locale ();
	gtk_init (&argc, &argv);

    /*********LibOSSO init************/
    g_print("Initializing LibOSSO\n");
	/* The program name for registration is communicated from the
		Makefile via a -D preprocessor directive. Since it doesn't
		 contain any dots in it, a prefix of "com.nokia." will be added
		 to it internally within osso_initialize(). */
	ossoContext = osso_initialize("SampleService", "1.0", FALSE, NULL);
    if (ossoContext == NULL) {
       g_error("Failed to initialize LibOSSO\n");
    }
    /*******end of LibOSSO init*******/

#ifdef USE_LIBDBUS
    if(start_service() != 0)
#else
    if(start_service(ossoContext) != 0)
#endif
    {
        g_print("There is a ap instance is running already!\n");
        return 0;
    }
	
#ifdef USE_GLADE
	window = create_window ();
	gtk_widget_show (window);
#else
 	/* 创建一个新窗口 */
 	window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title(GTK_WINDOW(window), _("Calculator"));
	gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER_ALWAYS);
	gtk_window_set_resizable(GTK_WINDOW(window), FALSE);

 	/* 创建一个vbox */
 	vbox = (GtkVBox*)gtk_vbox_new(FALSE, 10);//nick temp
 	gtk_container_add(GTK_CONTAINER(window), (GtkWidget*)vbox);
		
 	/* 创建一个菜单条 */
 	menubar = (GtkMenuBar*)gtk_menu_bar_new();
    menuitem_about = (GtkMenuItem*)gtk_menu_item_new_with_label(_("About"));
    //sub menu&short cut
	g_signal_connect (G_OBJECT(menuitem_about), "activate", G_CALLBACK(on_imagemenuitem_about_activate), (gpointer)(&about_window));
	gtk_menu_bar_append(menubar,(GtkWidget*)menuitem_about);

 	/* 创建一个输入框 */
 	entry = (GtkEntry*)gtk_entry_new_with_max_length(20);//nick temp
    gtk_entry_set_alignment(entry, 1);
 	gtk_entry_set_text(entry, "0");

 	/* 创建一个table */
 	table = (GtkTable*)gtk_table_new(5, 4, TRUE);
		
 	button[0][0] = (GtkButton*)gtk_button_new_with_label(_("Bksp"));
 	button[0][1] = (GtkButton*)gtk_button_new_with_label(_("CE"));
 	button[0][2] = (GtkButton*)gtk_button_new_with_label(_("Clr"));
 	button[0][3] = (GtkButton*)gtk_button_new_with_label(_("+/-"));
 	button[1][0] = (GtkButton*)gtk_button_new_with_label(_("7"));
 	button[1][1] = (GtkButton*)gtk_button_new_with_label(_("8"));
 	button[1][2] = (GtkButton*)gtk_button_new_with_label(_("9"));
 	button[1][3] = (GtkButton*)gtk_button_new_with_label(_("/"));
 	button[2][0] = (GtkButton*)gtk_button_new_with_label(_("4"));
 	button[2][1] = (GtkButton*)gtk_button_new_with_label(_("5"));
 	button[2][2] = (GtkButton*)gtk_button_new_with_label(_("6"));
 	button[2][3] = (GtkButton*)gtk_button_new_with_label(_("*"));
 	button[3][0] = (GtkButton*)gtk_button_new_with_label(_("1"));
 	button[3][1] = (GtkButton*)gtk_button_new_with_label(_("2"));
 	button[3][2] = (GtkButton*)gtk_button_new_with_label(_("3"));
 	button[3][3] = (GtkButton*)gtk_button_new_with_label(_("-"));
 	button[4][0] = (GtkButton*)gtk_button_new_with_label(_("0"));
 	button[4][1] = (GtkButton*)gtk_button_new_with_label(_("."));
 	button[4][2] = (GtkButton*)gtk_button_new_with_label(_("="));
 	button[4][3] = (GtkButton*)gtk_button_new_with_label(_("+"));

 	for(i=0; i<5; i++)
 	 	for(j=0; j<4; j++)
        {
 	 	 	g_signal_connect(G_OBJECT(button[i][j]), "clicked", G_CALLBACK(number_button_clicked_cb), (gpointer)entry);
            gtk_table_attach_defaults(table, (GtkWidget*)button[i][j], j, j+1, i, i+1);
		}

 	gtk_table_set_row_spacings(table, 3);
 	gtk_table_set_col_spacings(table, 3);

 	/* 创建一个table */
 	gtk_box_pack_start(GTK_BOX(vbox), (GtkWidget*)menubar, TRUE, TRUE, 10);
 	gtk_box_pack_start(GTK_BOX(vbox), (GtkWidget*)entry, TRUE, TRUE, 10);
 	gtk_box_pack_start(GTK_BOX(vbox), (GtkWidget*)table, TRUE, TRUE, 10);

	g_signal_connect (G_OBJECT(window), "delete_event", G_CALLBACK(delete_event), NULL);
    g_signal_connect (G_OBJECT(window), "destroy", G_CALLBACK(destroy), NULL);

    gtk_widget_show_all(window);
#endif

	gtk_main ();

	/* Deinitialize LibOSSO. The function doesn't return status code so
		 we cannot know whether it succeeded or failed. We assume that it
		 always succeeds. */
	osso_deinitialize(ossoContext);
	ossoContext = NULL;

	return 0;
}