GTK设置当前的焦点

/*

 * Copyright (C) Jcodeer Zhang 2011

 * 

 * This application 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.

 * 

 * This application 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 <

 * 

 * 功能介绍

 * 演示了如何设置当前焦点位置

 * 构建命令

 * gcc -g -o 015.exe 015.c `pkg-config --cflags --libs gtk+-2.0`

 */

#include

/**

*callback function of button

*@param w widget

*@param userdata

*/

void hello_proc(GtkWidget* w,gpointer userdata)

{

g_printf("hello button %d",(int)userdata);

}

#define WIDTH 480

#define HEIGHT 320

int main(int argc,char** argv)

{

    gtk_init(&argc,&argv);

GtkWidget* main_win = gtk_window_new(GTK_WINDOW_TOPLEVEL);

gtk_widget_set_size_request(main_win,WIDTH,HEIGHT);

gtk_container_set_border_width(GTK_CONTAINER(main_win),5);

    //创建垂直布局

GtkWidget* v = gtk_vbox_new(FALSE,5);

gtk_container_add(GTK_CONTAINER(main_win),v);

    //创建按钮

GtkWidget* b1 = gtk_button_new_with_label("GTK+ Button1");

gtk_box_pack_start(GTK_BOX(v),b1,FALSE,FALSE,0);

//设置按钮的单击事件回调函数，参数为1

g_signal_connect(

G_OBJECT(b1),"clicked",

G_CALLBACK(hello_proc),GSIZE_TO_POINTER(1));

    //创建按钮

GtkWidget* b2 = gtk_button_new_with_label("GTK+ Button2");

gtk_box_pack_start(GTK_BOX(v),b2,FALSE,FALSE,0);

//设置按钮的单击事件回调函数，参数为2

g_signal_connect(

G_OBJECT(b2),"clicked",

G_CALLBACK(hello_proc),GSIZE_TO_POINTER(2));

    //创建按钮

GtkWidget* b3 = gtk_button_new_with_label("GTK+ Button3");

gtk_box_pack_start(GTK_BOX(v),b3,FALSE,FALSE,0);

//设置按钮的单击事件处理函数，参数为3

g_signal_connect(

G_OBJECT(b3),"clicked",

G_CALLBACK(hello_proc),GSIZE_TO_POINTER(3));

    //设置主窗口的焦点在第二个按钮上

gtk_window_set_focus(GTK_WINDOW(main_win),b2);

g_signal_connect_swapped(

G_OBJECT(main_win),"destroy",

G_CALLBACK(gtk_main_quit),NULL);

//显示所有窗口

gtk_widget_show_all(main_win);

gtk_main();

    return 0;

}