C语言实现生成新春福字的示例详解

更新时间:2023-04-04 18:03:25 阅读：评论：0

主要代码

字面量以及数据结构

#define font_display "福" // g_fu_label中的每一个控件都是一个福字static gtkwidget *g_fu_label[3][3];// 记录所有的字体familytypedef struct {    int n_faces;    pangofontface **faces;}四级考试技巧custom_pangofontface_t;//字体family 的总数static int n_families=0;//当前正在使用的family 字体的索引static int family_id=0;// 记录每个字体family中的face（字模）static custom_pangofontface_t *custom_pangofontface;

定义一个回调函数露珠，刷新福字

static voidchange_fu_cb(gtkbutton *button , gpointer ur_data){    char *markup_fu_str = null;        // 3*3 的矩阵中一共有9个福字，分别设置每个福字的字体    for(int i=0;i<3;++i)    {        for(int j=0;j<3;++j)        {    // 获取当前family中的下一个字模，如果当前family中的字模都是用了，自动更新family_id 指向下一个family            if(family_id >= n_families) family_id=0;            if(++face_id >= custom_pangofontface[family_id].n_faces){                ++family_id;                if(family_id >= n_families)                    family_id=0;                                face_id = 0;            }                                    markup_fu_str = g_markup_printf_escaped("<span font-weight=\"bold\" font_desc=\"%s 99\">%s</span>",                    pango_font_description_to_string(pango_font_face_describe(custom_pangofontface[family_id].faces[0])),                    font_display);                        gtk_label_t_markup(gtk_label(g_fu_label[i][j]),markup_fu_str);                g_free(markup_fu_str);        }    }}

应用初始化程序

static voidactivate (gtkapplication* app,          gpointer ur_data){    gtkwidget *window;    gtkwidget *maingrid;    gtkwidget *overlay;    gtkwidget *picture;gtkcssprovider *cssprovider;const char *cssmaingrid = "grid {background-color:#ed3c43;}";const char *cssbutton = "* {background-color:#ff0000;}";pangofontmap *pangofontmap;gtkwidget *box;gtkwidget *button;    window = gtk_application_window_new (app);    gtk_window_t_title (gtk_window (window), "");    gtk_window_t_default_size (gtk_window (window), 900, 900);        maingrid = gtk_grid_new();    gtk_widget_t_hexpand(maingrid,true);    gtk_widget_t_vexpand(maingrid,true);        box = gtk_box_new(gtk_orientation_vertical,0);    gtk_widget_t_hexpand(box,true);    gtk_widget_t_vexpand(box,true);    gtk_box_append(gtk_box(box),maingrid);        button = gtk_button_new_with_label("换一批");    gtk_widget_t_hexpand(button,true);    gtk_widget_t_vexpand(button,true);    cssprovider = gtk_css_provider_new();    gtk_css_provider_load_from_data(gtk_css_provider(cssprovider),                                    cssbutton,                                    -1);    gtk_style_context_add_provider(gtk_widget_get_style_context(button),       其真无马邪     gtk_style_provider(cssprovider),            gtk_style_provider_priority_ur);    gtk_style_context_add_provider(gtk_widget_get_style_context(gtk_widget_get_first_child(button)),                                   gtk_style_provider(cssprovider),                                   gtk_style_provider_priority_ur);    g_object_unref(cssprovider);    g_signal_connect(button,"clicked",g_callback(change_fu_cb),null);    gtk_box_append(gtk_box(box),button);        gtk_window_t_child(gtk_window(window),box);        cssprovider = gtk_css_provider_new();    gtk_css_provider_load_from_data(gtk_css_provider(cssprovider),                                    cssmaingrid,                                    -1);    gtk_style_context_add_provider(gtk_widget_get_style_context(maingrid),            gtk_style_provider(cssprovider),            gtk_style_provider_priority_ur);    g_object_unref(cssprovider);            //获取当前系统中可用的字体 family    pangofontfamily **families;    pangofontmap = pango_cairo_font_map_get_default();    pango_font_map_list_families(pangofontmap,&families,&n_families);        custom_pangofontface = (custom_pangofontface_t *)g_malloc0(n_families*sizeof(custom_pangofontface_t));        for(int i=0;i<n_families;++i)    {    //获取每个字体 family 中可用的face        pango_font_family_list_faces(families[i],                &custom_pangofontface[i].faces,                &custom_pangofontface[i].n_faces);    }    g_free(families);        // 初始化每个福字控件    for(int i=0;i<3;++i)    {        for(int j=0;j<3;++j)        {            overlay = gtk_overlay_new();            gtk_widget_t_hexpand(overlay,true);            gtk_widget_t_vexpand(overlay,true);                        // 福字的背景图，需要放在执行程序所在的目录            picture = gtk_picture_new_for_filename("./fu.png");            gtk_widget_t_hexpand(picture,true);            gtk_widget_t_vexpand(picture,true);                        g_fu_label[i][j] = gtk_label_new("");            gtk_widget_t_hexpand(g_fu_label[i][j],true);            gtk_widget_t_vexpand(g_fu_label[i][英语音标怎么读j],true);                        gtk_overlay_t_child(gtk_overlay(overlay),picture);            gtk_overlay_add_overlay(gtk_overlay(overlay),g_fu_label[i][j]);                        gtk_grid_attach(gtk_grid(maingrid),overlay,i,j,1,1);        }    }        //初始化福字    change_fu_cb(gtk_button(button) , null);        gtk_window_t_resizable(gtk_window(window),fal);    gtk_widget_show (window);}

主程序

intmain(int argc, char *argv[]){    gtkapplication *app;    int status;    app = gtk_application_new ("org.gtk.example", g_application_flags_none);    g_signal_connect (app, "activate", g_callback (activate), null);        status = g_application_run (g_application (app), argc, argv);    g_object_unref (app);        //释放资源    for(int i=0;i<n_f马六甲海峡位于amilies;++i){        g_free(custom_pangofontface[i].faces);    }    g_free(custom_pangofontface);    return status;}