GString基本操作二

alimyso

该演示主要操作一个字符串，分解成单个字符，同时获取字符串长度，部分字符串等
作者：AlimysoYang

2. #include <gtk/gtk.h>
4. GtkWidget *wnd;
5. GtkWidget *vbox,*hbox;
6. GtkWidget *entry,*btntest,*btnquit;
8. void ui_init()
9. {
10.     wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
11.     gtk_window_set_title(GTK_WINDOW(wnd),"Test GString");
12.     gtk_window_set_position(GTK_WINDOW(wnd),GTK_WIN_POS_CENTER);
13.    
14.     vbox = gtk_vbox_new(TRUE,2);
15.     hbox = gtk_hbox_new(TRUE,2);
16.     entry = gtk_entry_new();
17.     btntest = gtk_button_new_with_label("测试");
18.     btnquit = gtk_button_new_with_label("退出");
19.     gtk_box_pack_start_defaults(GTK_BOX(hbox),btntest);
20.     gtk_box_pack_start_defaults(GTK_BOX(hbox),btnquit);
21.    
22.     gtk_box_pack_start_defaults(GTK_BOX(vbox),entry);
23.     gtk_box_pack_start_defaults(GTK_BOX(vbox),hbox);
24.    
25.     gtk_container_add(GTK_CONTAINER(wnd),vbox);
26.     gtk_container_set_border_width(GTK_CONTAINER(wnd),5);
27.     gtk_widget_show_all(wnd);
28. }
30. void FormDestroy(GtkWidget *widget,GdkEvent *event,gpointer data)
31. {
32.     gtk_main_quit();
33. }
35. void btntest_clicked(GtkButton *button,gpointer data)
36. {
37.     GString *teststr;
38.     const gchar *textc = gtk_entry_get_text(GTK_ENTRY(entry));
39.     teststr = g_string_new(textc);
41.     int len = teststr->len;
42.     g_printf("GString Len:%d\n",len);
43.     g_printf("GString Allocated_Len:%d\n",teststr->allocated_len);
44.     g_printf("GString Value:%s\n",teststr->str);
45.     int i;
46.     for (i = 0;i<len;i++)
47.     g_printf("GString Value[%d]:%c\n",i,teststr->str);
48.    
49.     GString *partstr = g_string_sized_new(len - 2);
50.     for (i = 1;i<=len - 2;i++)
51.     g_string_append_c(partstr,teststr->str);
52.     g_printf("PartStr GString Len And PartStr:%d %s\n",partstr->len,partstr->str);
53.     g_string_free(teststr,TRUE);
54. }
56. int main(int argc,char *argv[])
57. {
58.     gtk_init(&argc,&argv);
59.    
60.     ui_init();
61.    
62.     g_signal_connect(G_OBJECT(wnd),"destroy",G_CALLBACK(FormDestroy),NULL);
63.     g_signal_connect_swapped(G_OBJECT(btnquit),"clicked",G_CALLBACK(FormDestroy),NULL);
64.     g_signal_connect(G_OBJECT(btntest),"clicked",G_CALLBACK(btntest_clicked),NULL);
65.     gtk_main();
66.     return 0;
67. }

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Tom

嗯，不错，呵呵，发贴，贴代码的时候，编辑框上有个代码的标签，这样效果会比较好一点。

gtk-inkscape

嗯~~收藏啦。谢谢LZ。

ekd123

个人觉得 GString 里面 g_string_printf 最好用！很方便，而且不会溢出！