winitial.c

MinGUI 可视化程序代码

 /******************************************************************************
*
* Copyright  2006 National ASIC Center, All right Reserved
*
* FILE NAME:      winitial.c
* PROGRAMMER:     ming.c
* Date of Creation:   2006/08/8
*
* DESCRIPTION:
*
* NOTE:
*
* FUNCTIONS LIST:
* -----------------------------------------------------------------------------
*
* -----------------------------------------------------------------------------
*      To My JunHang
* MODIFICATION HISTORY
*     LastModify  2006/10/30
******************************************************************************/
#include "mingui.h"
//---------------------------------------------------------------------------
TMsgQueue g_SysMsgQueue;
TWndCanvas *g_ScreenCanvas=NULL;
TWndCanvas *DC_FreeList=NULL;
VRAM    *g_LcdFrameVram=NULL;
void    *GUI_LcdFrameBuffer=NULL; //LCD帧缓冲区首地址
static  BOOL GUI_Running=false;
extern  TBLOCKHEAP g_ClipRegionHeap;
extern  TREGION WndClipRegion;
//---------------------------------------------------------------------------
extern void  SimulatorInitialize(void *,void *,void *,int,int,int,int,int,int,int,int,char *);
extern void *SimulatorAllocateLcdFrameBuffer(void);
extern void  SimulatorDestroyLcdFrameBuffer(void);
extern void  DeleteLcdFrameBuffer(void);
extern void  GAL_Initialize(void);
extern void  GAL_Destroy(void);
extern void  GUI_TimerPulse(void);
extern void  DispatchUserMsg(DWORD msg,DWORD wParam,DWORD lParam);
extern void  UnregisterAllClass(void);
extern void  GUI_RegisterControls(void);
extern void  ReexposeRootWnd(void);
static BOOL  CreateRootWindow(void);
static void  DestroyRootWindow(void);
static BOOL  InitMsgQueue(TMsgQueue *pMsgQueue);
static void  FreeMsgQueue(TMsgQueue *pMsgQueue);
static HRESULT CALLBACK RootWindowProc(HWND hWnd,UINT message,WPARAM wParam,LPARAM lParam);
/*---------------------------------------------------------------------------
FUNCTION
  GUI_Initialize
DESCRIPTION
  初始化GUI系统，包括：
      (1)初始化LCD驱动
      (2)初始化调色板
      (3)初始化控件类
  该函数在创建第一个窗体时被隐式调用，不允许用户手动调用
---------------------------------------------------------------------------*/
BOOL GUI_Initialize(void)
{ if(!GUI_Running)
  { GUI_Running=true;
 
    #if(BASE_OS_TYPE==1)
    SimulatorInitialize(GUI_TimerPulse,DispatchUserMsg,PixelMapToColor,GUI_CLK_CYCLE,LCD_WIDTH,LCD_HEIGHT,BITS_PER_PIXEL,PIXEL_BIG_ENDIAN,INDEX_RED_BITWIDTH,INDEX_GREEN_BITWIDTH,INDEX_BLUE_BITWIDTH,"1.1");
    #endif
 
    #if(DC_PRELOAD_COUNT>0)
    { DC_FreeList=(TWndCanvas *)GetMem(DC_PRELOAD_COUNT * sizeof(TWndCanvas));
      if(DC_FreeList)
      { int i=0;
        TWndCanvas *node=DC_FreeList;
        while(i<DC_PRELOAD_COUNT)
        { node->Next = node+1;
          node->Prev = node-1;
          node++;
          i++;
        }
        DC_FreeList->Prev=DC_FreeList+DC_PRELOAD_COUNT-1;
        DC_FreeList->Prev->Next=DC_FreeList;
      }
    }
    #endif
	InitBlockDataHeap(&g_ClipRegionHeap, sizeof (TClipRect), CLIPRGN_HEAP_SIZE);

	InitRegion(&WndClipRegion, &g_ClipRegionHeap);

	if(!InitMsgQueue(&g_SysMsgQueue)) return false;
    
	if(!CreateRootWindow()) return false;

    GUI_RegisterControls();
  }
  return true;
}
/*---------------------------------------------------------------------------
FUNCTION
  GUI_Destroy
DESCRIPTION
  销毁GUI系统，释放占用资源，包括：
    (1)销毁调色板
    (2)销毁LCD驱动所占用的资源
  该函数在销毁GUI系统最后一个窗体时被隐式调用，不允许用户手动调用
---------------------------------------------------------------------------*/
void GUI_Destroy(void)
{ if(GUI_Running)
  { 
    FreeBlockDataHeap(&g_ClipRegionHeap);
	FreeMsgQueue(&g_SysMsgQueue);
	DestroyRootWindow();
	UnregisterAllClass();
    GUI_Running=false;/*GUI服务结束标*/
  }
}

/*---------------------------------------------------------------------------
FUNCTION
   CreateMsgQueue
DESCRIPTION
  创建消息队列
  每个消自己大小:  sizeof(TMSG)
  队列中消息总数:  MSG_QUEUE_CAPACITY
---------------------------------------------------------------------------*/
BOOL InitMsgQueue(TMsgQueue *pMsgQueue)
{ if(pMsgQueue)
  { int MsgQueueBufSize=sizeof(TMSG)*MSG_QUEUE_CAPACITY;
    pMsgQueue->messagesize=sizeof(TMSG);
    pMsgQueue->startaddress=(char *)GetMem(MsgQueueBufSize);
    pMsgQueue->endaddress=pMsgQueue->startaddress+MsgQueueBufSize;
    pMsgQueue->readpos=pMsgQueue->startaddress;
    pMsgQueue->writepos=pMsgQueue->startaddress;
    #if(BASE_OS_TYPE>1)  /*Kernel of EmbedOS available*/
    pMsgQueue->Waiting=false;
    pMsgQueue->Semaphor=Semaphore_Create();
    #endif
  }
  return (pMsgQueue && pMsgQueue->startaddress);
}
/*---------------------------------------------------------------------------
FUNCTION
   DestroyMsgQueue
DESCRIPTION
  销毁消息队列
---------------------------------------------------------------------------*/
void  FreeMsgQueue(TMsgQueue *pMsgQueue)
{ if(pMsgQueue && pMsgQueue->startaddress)
  { FreeMem(pMsgQueue->startaddress);
    memset(pMsgQueue,0,sizeof(TMsgQueue));
    #if(BASE_OS_TYPE>1)  /*Kernel of EmbedOS available*/
    Semaphore_Destroy(pMsgQueue->Semaphore);
    #endif
  }
}
/*---------------------------------------------------------------------------
FUNCTION
  CreateRootWindow
DESCRIPTION
  RootWindow是一个虚构的特殊的窗口结点，它是GUI窗口与GDI库函数的接口。
  不允许用户对根结点窗口进行任何操作，因为它其实不是一个真实的窗口。
---------------------------------------------------------------------------*/
BOOL CreateRootWindow(void)
{  TWNDCLASS	wc;
   VRAM   *RootWndVram;
   memset(&wc,0,sizeof(wc));
   wc.lpfnWndProc = RootWindowProc;
   wc.lpszClassName = "MinGUI";
   RegisterClass( &wc);

   g_RootWnd = (PWND)GetMem(sizeof(TWND)+sizeof(TWndFamily));
   if(!g_RootWnd) return false;

   if(!GUI_LcdFrameBuffer)
   {
     #if BASE_OS_TYPE==1 
     GUI_LcdFrameBuffer=SimulatorAllocateLcdFrameBuffer();
     #else
        #ifdef LCD_FrameBuffer
	    GUI_LcdFrameBuffer=(void *)LCD_FrameBuffer;
        #else
		GUI_LcdFrameBuffer=NULL;
        #endif
     #endif
   }
   RootWndVram=CreateVRAM(0,0,LCD_WIDTH,LCD_HEIGHT,GUI_LcdFrameBuffer,true);
   g_LcdFrameVram=(GUI_LcdFrameBuffer)?RootWndVram:NULL; /*if support frame buffer*/
   if(!RootWndVram)return false;

   InitRegion(&RootWndVram->ExposeRegion, &g_ClipRegionHeap);

   g_RootWnd->Family=(TWndFamily *)&g_RootWnd->ExtraLong[1];
   g_RootWnd->Family->TopWnd=g_RootWnd;
   g_RootWnd->Family->HisFocus=g_RootWnd;
   g_RootWnd->Family->Vram=RootWndVram;
   g_RootWnd->Family->CanvasChanged=false;

   g_RootWnd->WinClass = FindClassByName("MinGUI");
   g_RootWnd->Background=0;
   g_RootWnd->Foreground=(PIXEL)(-1);
   g_RootWnd->Style=0;

   g_RootWnd->Parent = NULL;
   g_RootWnd->Children = NULL;
   g_RootWnd->Next = NULL;
   g_RootWnd->Prev = NULL;
   
   g_RootWnd->unmapcount = 0;
   g_RootWnd->Mark=GUI_MARK_WND; /*设置窗体标志*/
   g_RootWnd->ID = 0;
   g_RootWnd->Canvas=NULL;
   g_RootWnd->HookProc=NULL;
   g_RootWnd->Caption.Text[0]=0;

   g_RootWnd->WndRect.left=0;
   g_RootWnd->WndRect.top=0;
   g_RootWnd->WndRect.right=LCD_WIDTH;
   g_RootWnd->WndRect.bottom=LCD_HEIGHT;
   g_RootWnd->ClientRect=g_RootWnd->WndRect;
   
   strncpy(g_RootWnd->Caption.Text,"MinGUI",FixedWndTextSize);
  
   g_ScreenCanvas=(TWndCanvas *)GetDC(g_RootWnd);   /*DC_FreeList的第一个DC*/

   g_LastFocus=NULL;         /*上次焦点*/
   g_CurrentFocus=g_RootWnd; /*当前焦点*/
   return true;
}
/*---------------------------------------------------------------------------
FUNCTION
  DestroyRootWindow
DESCRIPTION
。销毁GUI窗口的根节点
---------------------------------------------------------------------------*/
void DestroyRootWindow(void)
{   g_RootWnd->Mark=0;
    FreeVRAM(g_RootWnd->Family->Vram);
    FreeMem(g_RootWnd);
    #if BASE_OS_TYPE==1 
     SimulatorDestroyLcdFrameBuffer();
    #endif 
    FreeMem(g_ScreenCanvas);
    g_ScreenCanvas=NULL;
    g_LcdFrameVram=NULL;
	g_LastFocus=NULL;
    g_CurrentFocus=NULL;
	GUI_LcdFrameBuffer=NULL;
}

//////////////////////////////////////////////////////////////////////////////////
HRESULT CALLBACK RootWindowProc(HWND hWnd,UINT message,WPARAM wParam,LPARAM lParam)
{ switch(message)
  {
	case WM_ERASEBKGND:
		 { HDC dc=(HDC)wParam;
		   TRECT *prc=(TRECT *)lParam;
		   ClearRect(dc,prc->left,prc->top,prc->right-prc->left,prc->bottom-prc->top);
		 }
         return 0;
    case WM_EXPOSE:
		   ReexposeRootWnd();
         return 0;

    case WM_LBUTTONDOWN:
		 if(hWnd!=(HWND)g_CurrentFocus)
         { SetFocus(hWnd);
         }
         return 0;
  }
  return 0;
}
/*---------------------------------------------------------------------------
END --- Thank you!                                                     ming.c
---------------------------------------------------------------------------*/