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图形系统里，常用的Input Device应该就是Keyboard和Mouse了
KB一般是PS2接口或者USB接口，当然也可以自定义，例如使用串口的Keypad；而KeyMap，常用的是美式键盘，WindML还支持一些其它布局
Mouse也是类似的，PS2、USB、串口，都可以。系统在处理Mouse数据时，通常在屏幕上绘制一个Pointer；而提供Pointer消息的，还可能是其它Device，例如Touch、Tablet
WindML在响应这些Input Device时，会将它们的数据封装为Input Message，然后route到Application，这个机制叫做Input Service
今天主要看看Application如何使用这些Input Message，至于Input Service内部是如何工作的，以后有机会再说
首先通过uglRegistryFind()找到Input Service
然后通过uglInputMsgGet()获取Input Message
参数timeout比较简单，单位是毫秒，另外可用UGL_NO_WAIT和UGL_WAIT_FOREVER
pMsg就复杂一些了
type一般是MSG_KEYBOARD或MSG_POINTER；objectId在callback里使用(以后再说)；data是union类型
data的详细定义如下
代码语言：javascript复制/* raw keyboard messages are posted by keyboard drivers */
typedef struct ugl_raw_kbd_data
{
struct ugl_input_dev *deviceId; /* input device id */
UGL_BOOL isKeyDown; /* down transition */
UGL_BOOL isExtended; /* extended key */
UGL_BOOL isKeyCode; /* down transition */
union
{
UGL_UINT32 scanCode; /* key scancode */
UGL_UINT32 keyCode; /* mapped key value modifiers */
}value;
} UGL_RAW_KBD_DATA;
/* raw pointer messages are posted by pointer drivers */
typedef struct ugl_raw_ptr_data
{
struct ugl_input_dev *deviceId; /* input device id */
UGL_UINT16 buttonState; /* pointer button states */
UGL_BOOL isAbsolute; /* UGL_TRUE == absolute,
UGL_FALSE == relative */
union
{
UGL_POINT absolute; /* absolute coordinates */
UGL_VECTOR relative; /* relative coordinates */
}pos;
} UGL_RAW_PTR_DATA;
/*
* modifiers
* Keyboard and pointer messages are tagged with the the current state of
* both the keyboard modifiers keys (<alt>, <ctrl>, etc.)
* and pointer button states (left button, right button, etc.).
* If a bit is set then the corresponding key or
* pointer button is "active" or is pressed down.
*/
#define UGL_PTR_BUTTON1 0x00000001
#define UGL_PTR_BUTTON2 0x00000002
#define UGL_PTR_BUTTON3 0x00000004
#define UGL_PTR_BUTTON4 0x00000008
#define UGL_PTR_BUTTON5 0x00000010
#define UGL_PTR_BUTTON_MASK 0x000000ff
#define UGL_PTR_MOD_MASK 0x000000ff
#define UGL_KBD_KEYDOWN 0x00010000
#define UGL_KBD_LEFT_ALT 0x00020000
#define UGL_KBD_RIGHT_ALT 0x00040000
#define UGL_KBD_ALT 0x00060000
#define UGL_KBD_LEFT_SHIFT 0x00080000
#define UGL_KBD_RIGHT_SHIFT 0x00100000
#define UGL_KBD_SHIFT 0x00180000
#define UGL_KBD_LEFT_CTRL 0x00200000
#define UGL_KBD_RIGHT_CTRL 0x00400000
#define UGL_KBD_CTRL 0x00600000
#define UGL_KBD_NUM_LOCK 0x00800000
#define UGL_KBD_SCROLL_LOCK 0x01000000
#define UGL_KBD_CAPS_LOCK 0x02000000
#define UGL_KBD_EXTENDED_KEY 0x04000000
#define UGL_KBD_NUM_PAD 0x08000000
#define UGL_KBD_MOD_MASK 0xffff0000 /* gets modifiers from keyCode */
#define UGL_KBD_KEY_MASK 0x0000ffff /* gets key value from keyCode */
/* keyboard message data -- generated from raw keyboard messages */
typedef struct ugl_keyboard_data
{
UGL_RAW_KBD_DATA rawKbd; /* keyboard data provided by driver */
UGL_TIMESTAMP timeStamp; /* time message was queued */
UGL_WCHAR key; /* mapped key value */
UGL_POINT ptrPos; /* position of pointer */
UGL_UINT32 modifiers; /* kbd modifier keys & ptr btn states */
} UGL_KEYBOARD_DATA;
/* pointer message data -- generated from raw pointer messages */
typedef struct ugl_pointer_data
{
UGL_RAW_PTR_DATA rawPtr; /* pointer data provided by driver */
UGL_TIMESTAMP timeStamp; /* time message was queued */
UGL_POINT position; /* position of pointer */
UGL_VECTOR delta; /* change in position of pointer */
UGL_UINT32 buttonState; /* ptr btn states & kbd modifiers*/
UGL_UINT32 buttonChange; /* change in pointer button states */
} UGL_POINTER_DATA;写个例子，用标准的PS2键鼠试试
代码语言：javascript复制/*
* 版权所有 公众号 VxWorks567
*/
#include <stdio.h> /* printf() */
#include <ugl/ugl.h>
#include <ugl/uglinput.h> /* UGL_INPUT_SERVICE_ID */
void uglTest()
{
UGL_REG_DATA *pReg;
UGL_MSG msg;
UGL_INPUT_SERVICE_ID srvId;
/* 初始化WindML */
uglDisplayOpen(NULL, NULL, NULL);
/* 获取输入服务 */
pReg = uglRegistryFind(UGL_INPUT_SERVICE_TYPE, NULL, NULL, NULL);
srvId = (UGL_INPUT_SERVICE_ID)pReg->id;
while(1)
{
/* 获取键鼠消息 */
uglInputMsgGet(srvId, &msg, UGL_WAIT_FOREVER);
if(msg.type == MSG_POINTER)
{
switch(msg.data.pointer.buttonChange)
{
case 0: /* 移动鼠标 */
printf("x = %d, y = %dn", msg.data.pointer.position.x, msg.data.pointer.position.y);
break;
case UGL_PTR_BUTTON1:
printf("Button Left %sn", (msg.data.pointer.buttonState & UGL_PTR_BUTTON1)?"Down":"Up");
break;
case UGL_PTR_BUTTON2:
printf("Button Right %sn", (msg.data.pointer.buttonState & UGL_PTR_BUTTON2)?"Down":"Up");
break;
case UGL_PTR_BUTTON3:
printf("Button Middle %sn", (msg.data.pointer.buttonState & UGL_PTR_BUTTON3)?"Down":"Up");
break;
default:
printf("Other Buttonn");
break;
}
}
else if(msg.type == MSG_KEYBOARD)
{
if(msg.data.keyboard.modifiers & UGL_KBD_KEYDOWN)
{
printf("Key %c Downn", msg.data.keyboard.key);
if (msg.data.keyboard.key == 'q' ||
msg.data.keyboard.key == 'Q')
break;
}
}
else
{
printf("other typen");
}
}
uglDisplayClose(NULL);
return;
}
跑一跑，效果如下
偷个懒，只打印了ASCII里的可打印字符，其它key，例如Ctrl、home等等，自己去调整吧
