wxWidgets对keyboard的支持

如果wxWidgets窗口需要截取键盘消息，最简单的方式就是创建窗口的时候用上

wxWANTS_CHARS

这个标志。有这个标志的窗口，会被wxWidgest底层感知，然后只要窗口在焦点上，就能收到键盘消息。只要：

1、用上 EVT_KEY_DOWN消息宏

2、写好改宏要的一个方法

在上面2的方法中，我们就能截取到wxKeyEvent类型的消息，可以通过

wxKeyEvent 的 GetKeyCode()来得到下面表格中的键对应的代码，然后具体处理事情。

    WXK_BACK    = 8
    WXK_TAB     = 9
    WXK_RETURN  = 13
    WXK_ESCAPE  = 27
    WXK_SPACE   = 32
    WXK_DELETE  = 127

    // These are by design not compatible with unicode characters.
    // If you want to get a unicode character from a key event use
    // wxKeyEvent::GetUnicodeKey instead.
    WXK_START   = 300
    WXK_LBUTTON
    WXK_RBUTTON
    WXK_CANCEL
    WXK_MBUTTON
    WXK_CLEAR
    WXK_SHIFT
    WXK_ALT
    WXK_CONTROL
    WXK_MENU
    WXK_PAUSE
    WXK_CAPITAL
    WXK_END
    WXK_HOME
    WXK_LEFT
    WXK_UP
    WXK_RIGHT
    WXK_DOWN
    WXK_SELECT
    WXK_PRINT
    WXK_EXECUTE
    WXK_SNAPSHOT
    WXK_INSERT
    WXK_HELP
    WXK_NUMPAD0
    WXK_NUMPAD1
    WXK_NUMPAD2
    WXK_NUMPAD3
    WXK_NUMPAD4
    WXK_NUMPAD5
    WXK_NUMPAD6
    WXK_NUMPAD7
    WXK_NUMPAD8
    WXK_NUMPAD9
    WXK_MULTIPLY
    WXK_ADD
    WXK_SEPARATOR
    WXK_SUBTRACT
    WXK_DECIMAL
    WXK_DIVIDE
    WXK_F1
    WXK_F2
    WXK_F3
    WXK_F4
    WXK_F5
    WXK_F6
    WXK_F7
    WXK_F8
    WXK_F9
    WXK_F10
    WXK_F11
    WXK_F12
    WXK_F13
    WXK_F14
    WXK_F15
    WXK_F16
    WXK_F17
    WXK_F18
    WXK_F19
    WXK_F20
    WXK_F21
    WXK_F22
    WXK_F23
    WXK_F24
    WXK_NUMLOCK
    WXK_SCROLL
    WXK_PAGEUP,
    WXK_PAGEDOWN,

    WXK_NUMPAD_SPACE,
    WXK_NUMPAD_TAB,
    WXK_NUMPAD_ENTER,
    WXK_NUMPAD_F1,
    WXK_NUMPAD_F2,
    WXK_NUMPAD_F3,
    WXK_NUMPAD_F4,
    WXK_NUMPAD_HOME,
    WXK_NUMPAD_LEFT,
    WXK_NUMPAD_UP,
    WXK_NUMPAD_RIGHT,
    WXK_NUMPAD_DOWN,
    WXK_NUMPAD_PAGEUP,
    WXK_NUMPAD_PAGEDOWN,
    WXK_NUMPAD_END,
    WXK_NUMPAD_BEGIN,
    WXK_NUMPAD_INSERT,
    WXK_NUMPAD_DELETE,
    WXK_NUMPAD_EQUAL,
    WXK_NUMPAD_MULTIPLY,
    WXK_NUMPAD_ADD,
    WXK_NUMPAD_SEPARATOR,
    WXK_NUMPAD_SUBTRACT,
    WXK_NUMPAD_DECIMAL,
    WXK_NUMPAD_DIVIDE,

    // the following key codes are only generated under Windows currently
    WXK_WINDOWS_LEFT,
    WXK_WINDOWS_RIGHT,
    WXK_WINDOWS_MENU,
    WXK_COMMAND,

    // Hardware-specific buttons
    WXK_SPECIAL1 = 193,
    WXK_SPECIAL2,
    WXK_SPECIAL3,
    WXK_SPECIAL4,
    WXK_SPECIAL5,
    WXK_SPECIAL6,
    WXK_SPECIAL7,
    WXK_SPECIAL8,
    WXK_SPECIAL9,
    WXK_SPECIAL10,
    WXK_SPECIAL11,
    WXK_SPECIAL12,
    WXK_SPECIAL13,
    WXK_SPECIAL14,
    WXK_SPECIAL15,
    WXK_SPECIAL16,
    WXK_SPECIAL17,
    WXK_SPECIAL18,
    WXK_SPECIAL19,
    WXK_SPECIAL20