使用GTK+获取屏幕分辨率并设置满屏显示效果

在linux下，经常需要设置程序全屏显示，GTK+中提供了获取屏幕分辨率的方式，然后只要根据得到的宽高设置窗口显示大小，同时使用gtk_window_set_decorated去掉边框和标题栏显示，就能实现相应的效果了。

下面程序，就是简单的给出了窗口满屏效果是如何实现的，为保证程序的正常退出，添加了键盘事件，按下Esc键，程序退出。

/*

 * Name: full_screen.c


 */


#include <gtk/gtk.h>
#include <gdk/gdk.h>
#include <gdk/gdkkeysyms.h> /* the key value defines can be found here */
#include <stdio.h>

static void
on_key_press(GtkWidget *widget, GdkEventKey *event, gpointer user_data)
{
    switch(event->keyval)
    {
        case GDK_Escape:
            gtk_main_quit();
            break;
        default:
            break;
    }
}
int main(int argc, char *argv[])
{
    gtk_init(&argc, &argv);


    /* Get the Screen Resolution */
    GdkScreen* screen;
    gint width, height;
    screen = gdk_screen_get_default();
    width = gdk_screen_get_width(screen);
    height = gdk_screen_get_height(screen);
    printf("screen width: %d, height: %d\n", width, height);

    /* Create window and set full screen */
    GtkWidget *window;
    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
    gtk_window_set_default_size(GTK_WINDOW(window), width, height);
    gtk_window_set_decorated(GTK_WINDOW(window), FALSE); /* hide the title bar and the boder */

    gtk_widget_show (window);


    /* add key event for quit */
    g_signal_connect(G_OBJECT(window), \
            "key-press-event", \
            G_CALLBACK(on_key_press), NULL);

    gtk_main();

    return 0;
}


编译执行程序

$ gcc -g `pkg-config --cflags --libs gtk+-2.0` -o full_screen full_screen.c

$ ./full_screen