wincaret.c

MinGUI 可视化程序代码

/******************************************************************************
*
* Copyright  2006 National ASIC Center, All right Reserved
*
* FILE NAME:      Caret.c
* PROGRAMMER:     ming.c
* Date of Creation:   2006/08/8
*
* DESCRIPTION:
*     Single Line Editor
* NOTE:
*
* FUNCTIONS LIST:
* -----------------------------------------------------------------------------
*
* -----------------------------------------------------------------------------
* 
* MODIFICATION HISTORY
*     LastModify  2006/10/30
******************************************************************************/
#include "mingui.h"
//-----------------------------------------------------------------------------
#define DEF_BLINK_TIME		500	/* default blink time in ms*/

typedef struct 
{	HWND	hwnd;		/* != NULL if caret is created*/
	int	x;
	int	y;
	int	nWidth;
	int	nHeight;
	int nShowCount;
	BOOL fShown;		/* caret is currently visible*/
	UINT	BlinkTimeInterval;
	HANDLE  BlinkTimerHandle;
} CARETINFO;

/* local data*/
static CARETINFO sysCaret={0,0,0,0,0,0,0,0,0};	/* the system caret*/

/* local procs*/

static void CM_XorDrawCaret(void);
static void CM_BlinkCarret(HWND hWnd);
void CreateCaret(HWND hWnd, int width, int height)
{ if(sysCaret.hwnd && sysCaret.fShown)
  {  HideCaret(sysCaret.hwnd);
  }
  sysCaret.hwnd=hWnd;
  sysCaret.nShowCount=0;
  sysCaret.nWidth = (width <= 0)?1:width;
  sysCaret.nHeight = (height <= 0)?1:height;
  sysCaret.BlinkTimeInterval = DEF_BLINK_TIME;
  if(sysCaret.BlinkTimerHandle)
  { ResetTimer(sysCaret.BlinkTimerHandle,hWnd,DEF_BLINK_TIME,DEF_BLINK_TIME,CM_BlinkCarret,true);
  }
  else
  { sysCaret.BlinkTimerHandle=CreateTimer(hWnd,DEF_BLINK_TIME,DEF_BLINK_TIME,CM_BlinkCarret,true);
  }
}

BOOL DestroyCaret(HWND hWnd)
{  if(sysCaret.hwnd==hWnd)
   { if(sysCaret.fShown) 
     { HideCaret(hWnd);
     }
     EnableTimer(sysCaret.BlinkTimerHandle,false);
     sysCaret.hwnd = NULL;
   }
   return true;
}

/*
HideCaret() function will hide caret at right now,but it will be shown again at next second automatically.
if you want to stop the caret,you should use DestroyCaret() function.
*/
BOOL HideCaret(HWND hWnd)
{  if(sysCaret.hwnd==hWnd && sysCaret.fShown)
   { sysCaret.fShown = false;
	 CM_XorDrawCaret();
	 return true;
   }
   return false;
}

void CM_BlinkCarret(HWND hWnd)
{  if(sysCaret.hwnd==hWnd)
   { sysCaret.fShown = !sysCaret.fShown;
	 CM_XorDrawCaret();
   }
}

BOOL ShowCaret(HWND hWnd)
{  if(sysCaret.hwnd==hWnd && !sysCaret.fShown)
   {  sysCaret.fShown = true;
	 /* show caret, this call made it visible*/
	  CM_XorDrawCaret();
   } 
	return true;
}
 

BOOL SetCaretPos(HWND hWnd,int nX, int nY)
{ if(sysCaret.hwnd==hWnd && (sysCaret.x != nX || sysCaret.y != nY))
  {	if (sysCaret.fShown) 
    { CM_XorDrawCaret();	/* toggle off*/
	  sysCaret.x = nX;
      sysCaret.y = nY;
	  CM_XorDrawCaret();	/* toggle on in new location*/
	}
	sysCaret.x = nX;
	sysCaret.y = nY;
	return true;
  }
  return false; 
}

BOOL GetCaretPos(HWND hWnd,TPOINT *lpPoint)
{ if(sysCaret.hwnd==hWnd)
  { lpPoint->x = sysCaret.x;
	lpPoint->y = sysCaret.y;
	return true;
  }
  return false;
}

UINT GetCaretBlinkTime(void)
{	return sysCaret.BlinkTimeInterval;
}

BOOL SetCaretBlinkTime(UINT uMSeconds)
{  sysCaret.BlinkTimeInterval = uMSeconds;
	/* SetSysTimer */
	return true;
}

/* Draw the caret using XOR.  Same routine is used to show and hide caret.*/
static void CM_XorDrawCaret(void)
{   HDC dc = GetClientDC(sysCaret.hwnd);
 	SetPenLogic(dc,PL_XOR);
    ((TWndCanvas *)dc)->Foreground = UNIT_PIXEL_MASK;
		 
    if (sysCaret.nWidth == 1)
    {  DrawVerLine(dc,sysCaret.x, sysCaret.y,sysCaret.nHeight);
    } 
    else
    {  FillRect(dc,sysCaret.x, sysCaret.y,sysCaret.nWidth,sysCaret.nHeight);
    }

    ReleaseDC(dc);
}