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程序说明:
在这个程序中使用了容器,组装盒。
程序代码:
#include <gtk/gtk.h>
/*回调函数,传递到该函数的数据将打印到标准输出(stdout)*/
void callback (GtkWidget *widget, gpointer data)
{
g_print ("Hello again - %s was pressed\n", (gchar *)data);
}
gint delete_event (GtkWidget *widget, GdkEvent *event, gpointer data)
{
g_print ("goodbye\n", NULL);
gtk_main_quit ();
return FALSE;
}
int main (int argc, char *argv[])
{
GtkWidget *window;
GtkWidget *button;
GtkWidget *box1;
gtk_init (&argc, &argv);
/*创建一个新窗口*/
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
/*设置窗口标题为 "Hello Buttons!"*/
gtk_window_set_title (GTK_WINDOW(window), "Hello Buttons!");
g_signal_connect (G_OBJECT(window), "delete_event",
G_CALLBACK(delete_event), NULL);
/*设置窗口边框宽度*/
gtk_container_set_border_width (GTK_CONTAINER(window), 10);
/*创建一个组装盒,它仅被作为排列构件的工具*/
box1 = gtk_hbox_new (FALSE, 0);
/*将组装盒放入主窗口中*/
gtk_container_add (GTK_CONTAINER (window), box1);
/*创建一个标签为 "Button 1" 的新按钮*/
button = gtk_button_new_with_label ("Button 1");
/*当按钮按下时,调用"callback"函数,并将一个指向"button 1"字符串的指针
*作为它的参数*/
g_signal_connect (G_OBJECT(button), "clicked", G_CALLBACK(callback), "button 1");
/*代替gtk_container_add,我们将按钮放入不可见的组装盒,该组装盒已经
* 装进窗口中了*/
gtk_box_pack_start (GTK_BOX(box1), button, TRUE, TRUE, 0);
/*这一步是必须的,它告诉GTK我们为这个按钮准备工作已经完成,
* 现在可以显示它了*/
gtk_widget_show (button);
/*同样创建第 2 个按钮*/
button = gtk_button_new_with_label ("Button 2");
/*以不同的参数调用相同的回调函数,用指向"button 2"的指针代替*/
g_signal_connect (G_OBJECT(button), "clicked", G_CALLBACK(callback), "button 2");
gtk_box_pack_start (GTK_BOX(box1), button, TRUE, TRUE, 0);
gtk_widget_show (button);
/*退出按钮*/
button = gtk_button_new_with_label ("Quit");
g_signal_connect (G_OBJECT(button), "clicked", G_CALLBACK(delete_event), NULL);
gtk_box_pack_start (GTK_BOX(box1), button, TRUE, TRUE, 0);
/*显示的顺序并不重要,但建议最后显示窗口,这样它们会同时显示出来*/
gtk_widget_show (button);
gtk_widget_show (box1);
gtk_widget_show (window);
/*停在这里等待相关事件发生*/
gtk_main();
return (0);
} 编译连接生成:gcc hello_world.c -o hello_world `pkg-config --libs --cflags gtk+-2.0`
效果图:
说明:
图片上的左上角的方框是默认用来放置图标的,这里没有,所以显示为空。以此点击 Button 1 , Button 2 和 Quit 后,在终端中会看到:groad@linux-7paa:~/Programming/GTK> ./hello_world
Hello again - button 1 was pressed
Hello again - button 2 was pressed
goodbye |
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