{"id":90,"date":"2014-04-03T09:46:40","date_gmt":"2014-04-03T09:46:40","guid":{"rendered":""},"modified":"2014-04-03T09:46:40","modified_gmt":"2014-04-03T09:46:40","slug":"","status":"publish","type":"post","link":"http:\/\/weizn.net\/?p=90","title":{"rendered":"[\u8f6c]GTK \u4e8b\u4ef6"},"content":{"rendered":"

      \u4e8b\u4ef6\u662f\u7531X Window\u7cfb\u7edf\u53d1\u51fa\u7684\u7279\u6b8a\u7c7b\u578b\u7684\u4fe1\u53f7\u3002 \u5b83\u4eec\u6700\u521d\u7531X
\nWindow\u7cfb\u7edf\u53d1\u51fa\uff0c\u7136\u540e\u7531\u7a97\u53e3\u7ba1\u7406\u5668\u53d1\u7ed9\u60a8\u7684\u7a0b\u5e8f\uff0cGLib\u63d0\u4f9b\u7684\u4fe1\u53f7\u7cfb\u7edf\u5c31\u4f1a\u4e2d\u65ad\u3002\u4e3e\u4f8b\u6765\u8bf4\uff0cdestroy\u4fe1\u53f7\u7531\u6784\u4ef6\u53d1\u51fa\uff0c\u4f46\u662fdelete-
\nevent\u4e8b\u4ef6\u6700\u521d\u7531\u6784\u4ef6\u4e0b\u5c42\u7684GdkWindow\u8bc6\u522b\u51fa\u6765\uff0c\u7136\u540e\u53d1\u51fa\u4e00\u4e2a\u4fe1\u53f7\u7ed9\u6784\u4ef6\u3002<\/p>\n

\n\t        \u5b8c\u6210\u201c\u8fde\u63a5\u4e8b\u4ef6\u548c\u56de\u8c03\u51fd\u6570\u201d\u91c7\u7528\u4e86\u548c\u201cg_signal_connect()\u8fde\u63a5GTK+\u4fe1\u53f7<\/span>\u201d\u5dee\u4e0d\u591a\u4e00\u6837\u7684\u65b9\u5f0f\u3002\u7136\u800c\uff0c\u60a8\u7684\u56de\u8c03\u51fd\u6570\u7565\u6709\u4e0d\u540c\u3002\n<\/div>\n
\n\t\n<\/div>\n
\n
\n\t\t        static gboolean<\/i>\n\t<\/div>\n
\n\t\t        callback_function (GtkWidget *widget,<\/i>\n\t<\/div>\n
\n\t\t                                    GdkEvent *event,<\/i>\n\t<\/div>\n
\n\t\t                                    gpointer data);<\/i>\n\t<\/div>\n<\/div>\n
\n\t\n<\/div>\n
\n\t 
\n      
\n\u7b2c\u4e00\u4e2a\u4e0d\u540c\u7684\u5730\u65b9\u662f\u56de\u8c03\u51fd\u6570\u4f7f\u7528gboolean\u4f5c\u4e3a\u8fd4\u56de\u503c\u3002\u5982\u679c\u4e8b\u4ef6\u56de\u8c03\u51fd\u6570\u8fd4\u56deTRUE\uff0cGTK+\u8ba4\u4e3a\u4e8b\u4ef6\u5df2\u7ecf\u88ab\u5904\u7406\u5b8c\u4e86\uff0c\u5b83\u4e0d\u4f1a\u7ee7\u7eed\u5904\u7406\u3002\u901a\u8fc7\u8fd4\u56de
\nFALSE\uff0c\u60a8\u901a\u77e5GTK+\u7ee7\u7eed\u5904\u7406\u8be5\u4e8b\u4ef6\u3002FALSE\u662f\u51fd\u6570\u9ed8\u8ba4\u7684\u8fd4\u56de\u503c\uff0c\u56e0\u4e3a\u591a\u6570\u60c5\u51b5\u4e0b\u60a8\u4e0d\u7528\u4f7f\u7528delete-event\u4fe1\u53f7\u3002\u8fd9\u53ea\u5728\u4e00\u79cd\u60c5\u51b5\u4e0b\u6709
\n\u6548\uff0c\u5c31\u662f\u60a8\u60f3\u91cd\u8f7d\u9ed8\u8ba4\u7684\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u3002\n<\/div>\n
\n\t        \u4e3e\u4f8b\u6765\u8bf4\uff0c\u5728\u8bb8\u591a\u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c\u60a8\u4e5f\u8bb8\u9700\u8981\u786e\u8ba4\u7a0b\u5e8f\u9000\u51fa\u3002\u901a\u8fc7\u4f7f\u7528\u4e0b\u8ff0\u4ee3\u7801\uff0c\u60a8\u53ef\u4ee5\u9632\u6b62\u7a0b\u5e8f\u610f\u5916\u9000\u51fa\u3002\n<\/div>\n
\n\t\n<\/div>\n
\n
\n\t\t        static gboolean<\/i>\n\t<\/div>\n
\n\t\t        delete_event (GtkWidget *window,<\/i>\n\t<\/div>\n
\n\t\t                              GdkEvent *event,<\/i>\n\t<\/div>\n
\n\t\t                              gpointer data)<\/i>\n\t<\/div>\n
\n\t\t        {<\/i>\n\t<\/div>\n
\n\t\t            gboolean answer = \/* Ask the user if exiting is desired. *\/<\/i>\n\t<\/div>\n
\n\t\t            if (answer)<\/i>\n\t<\/div>\n
\n\t\t                return FALSE;<\/i>\n\t<\/div>\n
\n\t\t            else<\/i>\n\t<\/div>\n
\n\t\t                return TRUE;<\/i>\n\t<\/div>\n
\n\t\t        }<\/i>\n\t<\/div>\n<\/div>\n
\n\t\n<\/div>\n
\n\t        \u901a\u8fc7\u5728delete-event\u56de\u8c03\u51fd\u6570\u4e2d\u8fd4\u56deFALSE\uff0c\u6784\u4ef6\u81ea\u52a8\u8c03\u7528gtk_widget_destroy()\u3002\u6b63\u5982\u4ee5\u524d\u6240\u8ff0\uff0c\u4fe1\u53f7\u548c\u52a8\u4f5c\u662f\u81ea\u52a8\u5173\u8054\u7684\uff0c\u56e0\u6b64\u60a8\u4e0d\u7528\u7f16\u7a0b\u8fde\u63a5\u5b83\uff0c\u9664\u975e\u60a8\u8981\u4fee\u6539\u9ed8\u8ba4\u7684\u4e1c\u897f\u3002<\/span>\n<\/div>\n
\n\t         <\/span>\u9664\u6b64\u4e4b\u5916\uff0c\u56de\u8c03\u51fd\u6570\u5305\u62ecGdkEvent\u53c2\u6570\u3002GdkEvent\u662f\u4e2aC\u8054\u5408\u4f53\uff0c\u5305\u542bGdkEventType\u679a\u4e3e\u548c\u6240\u6709\u4e8b\u4ef6\u7ed3\u6784\u3002\u8ba9\u6211\u4eec\u770b\u4e00\u773cGdkEventType\u679a\u4e3e\u3002<\/span>\n<\/div>\n
\n\t\n<\/div>\n
\n\t\u4e8b\u4ef6\u7c7b\u578b<\/span><\/b>\n<\/div>\n
\n\t        GdkEventType\u679a\u4e3e\u7c7b\u578b\u63d0\u4f9b\u4e86\u4e00\u4e2a\u6709\u6548\u7684\u4e8b\u4ef6\u7c7b\u578b\u7684\u961f\u5217\u3002\u4ed6\u4eec\u53ef\u4ee5\u7528\u4e8e\u5224\u65ad\u53d1\u751f\u4e8b\u4ef6\u7684\u7c7b\u578b\uff0c\u6bd5\u7adf\u4f60\u4e0d\u662f\u603b\u6e05\u695a\u53d1\u751f\u4e86\u4ec0\u4e48\u3002\n<\/div>\n
\n\t 
\n      
\n\u4e3e\u4f8b\u6765\u8bf4\uff0c\u5982\u679c\u60a8\u628abutton-press-event\u4fe1\u53f7\u8fde\u63a5\u5230\u4e86\u4e00\u4e2a\u6784\u4ef6\uff0c\u4fe1\u53f7\u56de\u8c03\u51fd\u6570\u5c31\u6709\u53ef\u80fd\u6536\u52303\u4e2d\u4e0d\u540c\u7c7b\u578b\u7684\u4e8b
\n\u4ef6\uff1aGDK_BUTTON_PRESS\u3001GDK_2BUTTON_PRESS\u548cGDK_3BUTTON_PRESS\u3002\u53cc\u51fb\u6216\u8005\u4e09\u51fb\u6784\u4ef6\uff0c\u4e5f\u80fd\u89e6\u53d1
\nGDK_BUTTON_PRESS\uff0c\u4e0d\u8fc7\u4f5c\u4e3a\u7b2c\u4e8c\u6761\u4e8b\u4ef6\uff0c\u56e0\u6b64\u80fd\u591f\u533a\u5206\u51fa\u4e0d\u540c\u7684\u4e8b\u4ef6\u7c7b\u578b\u662f\u5fc5\u8981\u7684\u3002\n<\/div>\n
\n\t        \u5728\u9644\u5f55B\uff0c\u60a8\u53ef\u4ee5\u770b\u5230\u4e00\u4e2a\u5b8c\u6574\u5217\u8868\uff0c\u5305\u62ec\u6240\u6709\u6709\u6548\u5730\u4e8b\u4ef6\u3002\u5b83\u63d0\u4f9b\u4e86\u4fe1\u53f7\u540d\uff0c\u53ef\u4ee5\u4f20\u9012\u7ed9g_signal_connect()\uff0c\u8fd8\u63d0\u4f9b\u4e86GdkEventType\u679a\u4e3e\u503c\u548c\u4e8b\u4ef6\u7684\u63cf\u8ff0\u3002\n<\/div>\n
\n\t        \u8ba9\u6211\u4eec\u56de\u5934\u518d\u770b\u770bListing 2-2\u4e2d\u7684delete-event\u56de\u8c03\u51fd\u6570\u3002\u6211\u4eec\u5df2\u7ecf\u77e5\u9053\u4e86delete-event\u7684\u679a\u4e3e\u503c\u662fGDK_DELETE\uff0c\u4f46\u662f\u6211\u4eec\u5047\u5b9a\u5728\u67d0\u4e2a\u65f6\u523b\u6211\u4eec\u4e0d\u77e5\u9053\u3002\u6211\u4eec\u4e5f\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u4e0b\u5217\u4ee3\u7801\u6d4b\u8bd5\u51fa\u6765\uff1a\n<\/div>\n
\n\t\n<\/div>\n
\n
\n\t\t       <\/span> <\/span>static gboolean<\/i>\n\t<\/div>\n
\n\t\t       <\/span> <\/span>delete_event (GtkWidget *window,<\/i>\n\t<\/div>\n
\n\t\t       <\/span>                       <\/span>GdkEvent *event,<\/i>\n\t<\/div>\n
\n\t\t                             <\/span> <\/span>gpointer data)<\/i>\n\t<\/div>\n
\n\t\t       <\/span> <\/span>{<\/i>\n\t<\/div>\n
\n\t\t           <\/span> <\/span>if (event->type == GDK_DELETE)<\/i>\n\t<\/div>\n
\n\t\t               <\/span> <\/span>return FALSE;<\/i>\n\t<\/div>\n
\n\t\t       <\/span>     <\/span>return TRUE;<\/i>\n\t<\/div>\n
\n\t\t       <\/span> <\/span>}<\/i>\n\t<\/div>\n<\/div>\n
\n\t\n<\/div>\n
\n\t        \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u5982\u679c\u4e8b\u4ef6\u7c7b\u578b\u662fGDK_DELETE\uff0c\u5219\u8fd4\u56deFALSE\uff0c\u8fd9\u6837\u6784\u4ef6\u5c31\u4f1a\u8c03\u7528gtk_widget_destroy()\u3002\u5426\u5219\uff0c\u8fd4\u56deTRUE\uff0c\u5c31\u4e0d\u4f1a\u6709\u540e\u9762\u7684\u52a8\u4f5c\u4e86\u3002\n<\/div>\n
\n\t\n<\/div>\n
\n\t\u4f7f\u7528\u7279\u5b9a\u7684\u4e8b\u4ef6\u7ed3\u6784<\/b><\/span>\n<\/div>\n
\n\t        \u6709\u65f6\u5019\uff0c\u60a8\u4e5f\u8bb8\u5df2\u7ecf\u6e05\u695a\u53d1\u51fa\u7684\u4e8b\u4ef6\u7c7b\u578b\u4e86\u3002\u5728\u4e0b\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u77e5\u9053\u4e00\u5b9a\u53d1\u51fa\u7684\u662fkey-press-event\u3002\n<\/div>\n
\n\t\n<\/div>\n
\n
\n\t\t        g_signal_connect (G_OBJECT (widget), “key-press-event”<\/i>\n\t<\/div>\n
\n\t\t                                     G_CALLBACK (key_press), NULL);<\/i>\n\t<\/div>\n<\/div>\n
\n\t\n<\/div>\n
\n\t        \u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u60a8\u53ef\u4ee5\u5047\u5b9a\u4e8b\u4ef6\u7c7b\u578b\u4e00\u5b9a\u662fGDK_KEY_PRESS\uff0c\u8fd9\u662f\u5b89\u5168\u7684\uff0c\u56de\u8c03\u51fd\u6570\u53ef\u4ee5\u58f0\u660e\u6210\u5982\u4e0b\u6240\u793a\u3002\n<\/div>\n
\n\t\n<\/div>\n
\n
\n\t\t        static gboolean\n\t<\/div>\n
\n\t\t       <\/span> <\/span>key_press (GtkWidget *widget,\n\t<\/div>\n
\n\t\t       <\/span>                   <\/span>GdkEventKey *event,\n\t<\/div>\n
\n\t\t                         <\/span> <\/span>gpointer data)\n\t<\/div>\n<\/div>\n
\n\t\n<\/div>\n
\n\t 
\n      
\n\u65e2\u7136\u6211\u4eec\u5df2\u7ecf\u77e5\u9053\u4e86\u4e8b\u4ef6\u7c7b\u578b\u662fGDK_KEY_PRESS\uff0c\u6211\u4eec\u5c31\u4e0d\u9700\u8981\u8bbf\u95eeGdkEvnet\u4e2d\u7684\u6240\u6709\u7ed3\u6784\u4e86\u3002\u5728\u56de\u8c03\u51fd\u6570\u4e2d\uff0c\u6211\u4eec\u53ea\u9700\u8981\u4f7f\u7528
\nGdkEventKey\uff0c\u800c\u4e0d\u9700\u8981GdkEvent\u4e86\u3002\u65e2\u7136\u7c7b\u578b\u5df2\u7ecf\u88ab\u8f6c\u6362\u6210\u4e3aGdkEventKey\uff0c\u6211\u4eec\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee\u8be5\u7ed3\u6784\u7684\u6210\u5458\u3002\n<\/div>\n
\n\t\n<\/div>\n
\n
\n\t\t       <\/span>typedef struct<\/i>\n\t<\/div>\n
\n\t\t       <\/span><\/span>{<\/i>\n\t<\/div>\n
\n\t\t           <\/span><\/span>GdkEventType type; \/\/ GDK_KEY_PRESS or GDK_KEY_RELEASE<\/span><\/i>\n\t<\/div>\n
\n\t\t    <\/span><\/span>       <\/span><\/span>GdkWindow *window; \/\/ The window that received the event<\/span><\/i>\n\t<\/div>\n
\n\t\t    <\/span><\/span>    <\/span><\/span>   <\/span><\/span>gint8 send_event; \/\/ TRUE if the event used XSendEvent<\/span><\/i>\n\t<\/div>\n
\n\t\t       <\/span><\/span>    <\/span><\/span>guint32 time; \/\/ The length of the event in milliseconds<\/span><\/i>\n\t<\/div>\n
\n\t\t    <\/span><\/span>       <\/span><\/span>guint state; \/\/ The state of Control, Shift, and Alt<\/span><\/i>\n\t<\/div>\n
\n\t\t    <\/span><\/span>    <\/span><\/span>   <\/span><\/span>guint keyval; \/\/ The key that was pressed <gdk\/gdkkeysyms.h><\/span><\/i>\n\t<\/div>\n
\n\t\t       <\/span><\/span>    <\/span><\/span>gint length; \/\/ The length of string<\/span><\/i>\n\t<\/div>\n
\n\t\t    <\/span><\/span>       <\/span><\/span>gchar *string; \/\/ A string approximating the entered text<\/span><\/i>\n\t<\/div>\n
\n\t\t    <\/span><\/span>    <\/span><\/span>   <\/span><\/span>guint16 hardware_keycode; \/\/ Raw code of the key that was pressed or released<\/span><\/i>\n\t<\/div>\n
\n\t\t       <\/span><\/span>    <\/span><\/span>guint8 group; \/\/ The keyboard group<\/span><\/i>\n\t<\/div>\n
\n\t\t    <\/span><\/span>       <\/span><\/span>guint is_modifier : 1; \/\/ Whether hardware_keycode was mapped (since 2.10)<\/span><\/i>\n\t<\/div>\n
\n\t\t       <\/span><\/span>} GdkEventKey;<\/i>\n\t<\/div>\n<\/div>\n
\n\t\n<\/div>\n
\n\t        \u5728GdkEventKey\u7ed3\u6784\u4e2d\uff0c<\/span>\u6709\u8bb8\u591a\u6709\u7528\u7684\u5c5e\u6027\uff0c\u8fd9\u4e9b\u5185\u5bb9\u8d2f\u7a7f\u672c\u4e66\u3002\u5bf9\u60a8\u6765\u8bf4\uff0c\u9700\u8981\u7684\u65f6\u5019\u67e5\u9605\u5173\u4e8eGdkEvent\u7ed3\u6784\u7684API\u6587\u6863\uff0c\u6709\u5f88\u5927\u5e2e\u52a9\u3002\u672c\u4e66\u6211\u4eec\u53ea\u80fd\u8986\u76d6\u5c11\u6570\u6700\u91cd\u8981\u7684\u7ed3\u6784\uff0c\u5305\u62ecGdkEventKey\u548cGdkEventButton\u3002\n<\/div>\n
\n\t        \u5728\u6240\u6709\u4e8b\u4ef6\u7ed3\u6784\u4e2d\uff0c\u4e8b\u4ef6\u7c7b\u578b\u662f\u90fd\u6709\u7684\u6210\u5458\u53d8\u91cf\uff0c\u5b83\u5b9a\u4e49\u4e86\u6b63\u5728\u53d1\u751f\u7684\u4e8b\u4ef6\u7684\u7c7b\u578b\u3002\u59cb\u7ec8\u68c0\u67e5\u4e8b\u4ef6\u7c7b\u578b\u662f\u4e2a\u597d\u4e60\u60ef\uff0c\u9632\u6b62\u60a8\u610f\u5916\u51fa\u9519\u3002\n<\/div>\n","protected":false},"excerpt":{"rendered":"

      \u4e8b\u4ef6\u662f\u7531X Window\u7cfb\u7edf\u53d1\u51fa\u7684\u7279\u6b8a\u7c7b\u578b\u7684\u4fe1\u53f7\u3002 \u5b83\u4eec\u6700\u521d\u7531X
\nWindow\u7cfb\u7edf\u53d1\u51fa\uff0c\u7136\u540e\u7531\u7a97\u53e3\u7ba1\u7406\u5668\u53d1\u7ed9\u60a8\u7684\u7a0b\u5e8f\uff0cGLib\u63d0\u4f9b\u7684\u4fe1\u53f7\u7cfb\u7edf\u5c31\u4f1a\u4e2d\u65ad\u3002\u4e3e\u4f8b\u6765\u8bf4\uff0cdestroy\u4fe1\u53f7\u7531\u6784\u4ef6\u53d1\u51fa\uff0c\u4f46\u662fdelete-
\nevent\u4e8b\u4ef6\u6700\u521d\u7531\u6784\u4ef6\u4e0b\u5c42\u7684GdkWindow\u8bc6\u522b\u51fa\u6765\uff0c\u7136\u540e\u53d1\u51fa\u4e00\u4e2a\u4fe1\u53f7\u7ed9\u6784\u4ef6\u3002<\/p>\n

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