uCGUI窗口操作点滴记录

/* 窗体管理结构体 共30个字节 */
struct WM_Obj {
  GUI_RECT Rect;        //窗体尺寸(x0,y0,x1,y1)     8个字节
  GUI_RECT InvalidRect; //无效区域(x0,y0,x1,y1)     8个字节
  WM_CALLBACK* cb;      //回调函数                     4个字节
    
  WM_HWIN hNextLin;     //指向链表中的下一个窗体       2个字节
    
  WM_HWIN hParent;      //当前窗体的父窗体             2个字节
  WM_HWIN hFirstChild;  //当前窗体的第一个子窗体       2个字节
  WM_HWIN hNext;        //下一个兄弟窗体               2个字节
    
  U16 Status;           //标志位                       2个字节
};

struct WM_MESSAGE {
  int MsgId;            //信息的类型
  WM_HWIN hWin;         //信息的接收窗口
  WM_HWIN hWinSrc;      //发送信息的源窗口
  union {
    const void* p;      
    int v;
    GUI_COLOR Color;
  } Data;
};

/*********************************************************************
*
*               Messages Ids

The following is the list of windows messages.
*/

#define WM_CREATE                   0x0001  /* The first message received, right after client has actually been created */
#define WM_MOVE                     0x0003  /* window has been moved (Same as WIN32) */
#define WM_SIZE                     0x0005  /* Is sent to a window after its size has changed (Same as WIN32, do not change !) */
#define WM_DELETE                   11      /* Delete (Destroy) command: This tells the client to free its data strutures since the window                                              it is associates with no longer exists.*/
#define WM_TOUCH                    12      /* Touch screen message */
#define WM_TOUCH_CHILD              13      /* Touch screen message to ancestors */
#define WM_KEY                      14      /* Key has been pressed */
#define WM_PAINT                    0x000F  /* Repaint window (because content is (partially) invalid */
#if GUI_SUPPORT_MOUSE
#define WM_MOUSEOVER                16      /* Mouse has moved, no key pressed */
#define WM_MOUSEOVER_END            18      /* Mouse has moved, no key pressed */
#endif
#define WM_PID_STATE_CHANGED        17      /* Pointer input device state has changed */
#define WM_GET_INSIDE_RECT          20      /* get inside rectangle: client rectangle minus pixels lost to effect */
#define WM_GET_ID                   21      /* Get id of widget */
#define WM_SET_ID                   22      /* Set id of widget */
#define WM_GET_CLIENT_WINDOW        23      /* Get window handle of client window. Default is the same as window */
#define WM_CAPTURE_RELEASED         24      /* Let window know that mouse capture is over */
#define WM_INIT_DIALOG              29      /* Inform dialog that it is ready for init */
#define WM_SET_FOCUS                30      /* Inform window that it has gotten or lost the focus */
#define WM_GET_ACCEPT_FOCUS         31      /* Find out if window can accept the focus */
#define WM_NOTIFY_CHILD_HAS_FOCUS   32      /* Sent to parent when child receives / loses focus */
#define WM_NOTIFY_OWNER_KEY         33      /* Some widgets (e.g. listbox) notify owner when receiving key messages */
#define WM_GET_BKCOLOR              34      /* Return back ground color (only frame window and similar) */
#define WM_GET_SCROLL_STATE         35      /* Query state of scroll bar */
#define WM_SET_SCROLL_STATE         36      /* Set scroll info ... only effective for scrollbars */
#define WM_NOTIFY_CLIENTCHANGE      37      /* Client area may have changed */
#define WM_NOTIFY_PARENT            38      /* Notify parent. Information is detailed as notification code */
#define WM_NOTIFY_PARENT_REFLECTION 39      /* Notify parent reflection. 
                                               Sometimes send back as a result of the WM_NOTIFY_PARENT message
                                               to let child react on behalf of its parent.
                                               Information is detailed as notification code */
#define WM_NOTIFY_ENABLE            40      /* Enable or disable widget */
#define WM_NOTIFY_VIS_CHANGED       41      /* Visibility of a window has or may have changed */
#define WM_HANDLE_DIALOG_STATUS     42      /* Set or get dialog status */
#define WM_GET_RADIOGROUP           43      /* Send to all siblings and children of a radio control when
                                               selection changed */
#define WM_MENU                     44      /* Send to owner window of menu widget */
#define WM_SCREENSIZE_CHANGED       45      /* Send to all windows when size of screen has changed */

#define WM_TIMER                    0x0113  /* Timer has expired              (Keep the same as WIN32) */
#define WM_WIDGET                   0x0300  /* 256 messages reserved for Widget messages */
#define WM_USER                     0x0400  /* Reserved for user messages ... (Keep the same as WIN32) */


/*********************************************************************
*
*               Notification codes
*
* The following is the list of notification codes send
* with the WM_NOTIFY_PARENT message
*/
#define WM_NOTIFICATION_CLICKED             1
#define WM_NOTIFICATION_RELEASED            2
#define WM_NOTIFICATION_MOVED_OUT           3
#define WM_NOTIFICATION_SEL_CHANGED         4
#define WM_NOTIFICATION_VALUE_CHANGED       5
#define WM_NOTIFICATION_SCROLLBAR_ADDED     6      /* Scroller added */
#define WM_NOTIFICATION_CHILD_DELETED       7      /* Inform window that child is about to be deleted */
#define WM_NOTIFICATION_GOT_FOCUS           8
#define WM_NOTIFICATION_LOST_FOCUS          9
#define WM_NOTIFICATION_SCROLL_CHANGED     10

#define WM_NOTIFICATION_WIDGET             11      /* Space for widget defined notifications */
#define WM_NOTIFICATION_USER               16      /* Space for  application (user) defined notifications */

#define WM_CF_HASTRANS         (1<<0)  /* Has transparency. Needs to be defined for windows which do not fill the entire
                                          section of their (client) rectangle. */
#define WM_CF_HIDE             (0<<1)  /* Hide window after creation (default !) */
#define WM_CF_SHOW             (1<<1)  /* Show window after creation */
#define WM_CF_MEMDEV           (1<<2)  /* Use memory device for redraws */
#define WM_CF_STAYONTOP        (1<<3)  /* Stay on top */
#define WM_CF_DISABLED         (1<<4)  /* Disabled: Does not receive PID (mouse & touch) input */
/* Create only flags ... Not available as status flags */
#define WM_CF_ACTIVATE         (1<<5)  /* If automatic activation upon creation of window is desired */
#define WM_CF_FGND             (0<<6)  /* Put window in foreground after creation (default !) */
#define WM_CF_BGND             (1<<6)  /* Put window in background after creation */

/* Anchor flags */
#define WM_CF_ANCHOR_RIGHT     (1<<7)  /* Right anchor ... If parent is resized, distance to right will remain const (left is default) */
#define WM_CF_ANCHOR_BOTTOM    (1<<8)  /* Bottom anchor ... If parent is resized, distance to bottom will remain const (top is default) */
#define WM_CF_ANCHOR_LEFT      (1<<9)  /* Left anchor ... If parent is resized, distance to left will remain const (left is default) */
#define WM_CF_ANCHOR_TOP       (1<<10) /* Top anchor ... If parent is resized, distance to top will remain const (top is default) */

#define WM_CF_CONST_OUTLINE    (1<<11) /* Constant outline. This is relevant for transparent windows only. If a window is transparent
                                       and does not have a constant outline, its background is invalided instead of the window itself.
                                       This causes add. computation time when redrawing. */
#define WM_CF_LATE_CLIP        (1<<12)
#define WM_CF_MEMDEV_ON_REDRAW (1<<13)
#define WM_CF_RESERVED3        (1<<14)
#define WM_CF_RESERVED4        (1<<15)

static void cbBackWin( WM_MESSAGE* pMsg) {
  const WM_KEY_INFO* pKeyInfo;
  switch (pMsg->MsgId) {
  case WM_KEY:
    pKeyInfo = (const WM_KEY_INFO*)pMsg->Data.p;
    if (pKeyInfo->PressedCnt == 1) {
      GUI_StoreKey(pKeyInfo->Key);
    }
    break;
  case WM_PAINT:
    {
      int LayerIndex;
      #if GUI_NUM_LAYERS > 1
        LayerIndex = _DesktopHandle2Index(pMsg->hWin);
      #else
        LayerIndex = 0;
      #endif
      if (WM__aBkColor[LayerIndex] != GUI_INVALID_COLOR) {
        GUI_SetBkColor(WM__aBkColor[LayerIndex]);
        GUI_Clear();
      }
    }
  default:
    WM_DefaultProc(pMsg);
  }
}