http://www.cnblogs.com/rain-blog/p/gtk3-3.html
之前我们为窗口添加了一个按钮,接下来让这个按钮丰富一点。并给窗口加上图标。
首先创建 example3,c 的源文件。
#include <gtk/gtk.h>
static void activate(GtkApplication *app , gpointer data);
//从文件中加载一张图片
GdkPixbuf *create_pixbuf(const char *image_name);
int main(int argc , char **argv)
{
GtkApplication *app;
int app_status;
app = gtk_application_new("org.rain.gtk" , G_APPLICATION_FLAGS_NONE);
g_signal_connect(app , "activate" , G_CALLBACK(activate) , NULL);
app_status = g_application_run(G_APPLICATION(app) , argc , argv);
g_object_unref(app);
return app_status;
}
static void activate(GtkApplication *app , gpointer data)
{
GtkWidget *window;
GdkPixbuf *icon;
GtkWidget *button;
GtkWidget *button_box;
window = gtk_application_window_new(app);
gtk_window_set_title(GTK_WINDOW(window) , "icon test");
gtk_window_set_default_size(GTK_WINDOW(window) , 200 , 200);
gtk_window_set_position(GTK_WINDOW(window) , GTK_WIN_POS_CENTER);
//创建图标控件icon
icon = create_pixbuf("icon.png");
//为窗口设置图标
gtk_window_set_icon(GTK_WINDOW(window) , icon);
//创建一个带有加速键的按钮,按住 Alt 不放,再按C,即相当于点击按钮
button = gtk_button_new_with_mnemonic("_Close");
//为按钮设置一个信息提示条
gtk_widget_set_tooltip_text(button , "Click button to quit.");
button_box = gtk_button_box_new(GTK_ORIENTATION_HORIZONTAL);
gtk_container_add(GTK_CONTAINER(button_box) , button);
gtk_container_add(GTK_CONTAINER(window) , button_box);
g_signal_connect_swapped(button
, "clicked" , G_CALLBACK(gtk_widget_destroy) , window);
g_object_unref(icon);
gtk_widget_show_all(window);
}
GdkPixbuf *create_pixbuf(const char *image_name)
{
GdkPixbuf *pixbuf;
//加载图片文件,第二个参数设置错误变量的,不需要则设为 NULL
pixbuf = gdk_pixbuf_new_from_file(image_name , NULL);
if(!pixbuf) {
perror("gdk_pixbuf_new_from_file()
");
return NULL;
}
return pixbuf;
}
编译并运行:
gcc example.c `pkg-config --cflags --libs gtk+-3.0` ./a.out
结果: