smplebrowser.c

来自「好记星的控件,包括button,list,对文件操作」· C语言 代码 · 共 371 行

/**************************************************************************
                                                                          
              Copyright (C) 2005 SHENZHEN MEIJIN CO.LTD                   
                                                                          
 FILE NAME:   ApSmpBrowser.C                                                      
 MODULE NAME: ApSmpBrowser                                                        
 DESCRIPTION: 简单浏览器(只支持纯文本方式)
 对外函数声明:
	SmpBrowserHandleEvent		简单浏览器消息处理函数
	SmpBrwGetLine			    获取一行数据


**************************************************************************
    DTAE       AUTHOR     VERSION                 REMARKS                 
 =========== ==========  =========  ======================================
 2006-4-14    gaolinhui    V1.0     create                               
***************************************************************************/
#include "kernel.h"




/****************************************************************************
	Function:
		SmpBrowserHandleEvent
    Description:
		简单浏览器消息处理函数
	input:
		
	output:
		0		-		消息未处理
		!0		-		消息已经处理
	note:
  ****************************************************************************
	高林辉				2006-4-14				创建						
****************************************************************************/
INT	SmpBrowserHandleEvent(APGUI_STRUCT_MODEL *pGui, UINT uEvent, UINT uParam)
{
	PMSmpBrowser	handle;
	INT				nRet;
	UINT32			dwTopLine;
	UINT32			dwTotal;
	UINT16			wFontLib;
	UINT16			wLineSpace;
	UINT16			wPageLine;
	BOOL			bInit;

	handle     = (PMSmpBrowser)pGui;
	dwTopLine  = SMPBRW_TOPLINE;
	dwTotal	   = SMPBRW_TOTAL;
	wFontLib   = SYSTLIB;
	wPageLine  = SMPBRW_PAGELINE;
	wLineSpace = SMPBRW_LINEHI;
	bInit      = SMPBRW_INIT;
	nRet       = 0;

	switch(uEvent)
	{
	case EVENT_COMMAND:
		{
			nRet = 1;
			switch(uParam)
			{
			case CM_SMPBRW_UP:
				if(dwTopLine)
				{
					SMPBRW_TOPLINE --;
					MsgPost(NULL, EVENT_DRAW, 0);
				}
				break;
			case CM_SMPBRW_DWN:
				if(dwTopLine+wPageLine < dwTotal)
				{
					SMPBRW_TOPLINE ++;
					MsgPost(NULL, EVENT_DRAW, 0);
				}
				break;
			case CM_SMPBRW_PGUP:
				if(dwTopLine >= wPageLine)
				{
					SMPBRW_TOPLINE -= wPageLine;
					MsgPost(NULL, EVENT_DRAW, 0);
				}
				else if(dwTopLine > 0)
				{
					SMPBRW_TOPLINE = 0;
					MsgPost(NULL, EVENT_DRAW, 0);
				}
				break;
			case CM_SMPBRW_PGDWN:
				if(dwTopLine+wPageLine < dwTotal)
				{
					SMPBRW_TOPLINE += wPageLine;
					MsgPost(NULL, EVENT_DRAW, 0);
				}
				break;
			case CM_SMPBRW_SCANTOTAL:
				{
					UINT8* pBuf = handle->pData;
					UINT16 wid;
					UINT8  byRet;
					UINT32 totals;

					wid = handle->uWidth;
					totals = 0;
					if(!pBuf)
					{
						nRet = -1;
						break;
					}
					while(*pBuf)
					{
						pBuf += SmpBrwGetLine(pBuf, wid, wFontLib, &byRet);
						if(byRet == 0xff)
						{
							nRet = -1;
							break;
						}
						totals ++;
						if(byRet == 1)
						{
							nRet = totals;
							break;
						}
					}
				}
				break;
			default:
				nRet = 0;
				break;
			}

			
		}
		break;
	case EVENT_KEY:
	case EVENT_KEYREPEAT:
		{
			UINT uKey;
			uKey = READKB_VALUE(uParam);
			if(bInit != SMPBRW_INITCODE)
			{
				break;
			}
			if(uKey == MVK_UP)
			{
				MsgPost(NULL,EVENT_COMMAND, CM_SMPBRW_UP);
				nRet = 1;
			}
			else if(uKey == MVK_DOWN)
			{
				MsgPost(NULL,EVENT_COMMAND, CM_SMPBRW_DWN);
				nRet = 1;
			}
			else if(uKey == MVK_PGUP)
			{
				MsgPost(NULL,EVENT_COMMAND, CM_SMPBRW_PGUP);
				nRet = 1;
			}
			else if(uKey == MVK_PGDN)
			{
				MsgPost(NULL,EVENT_COMMAND, CM_SMPBRW_PGDWN);
				nRet = 1;
			}
			
		}
		break;
	case EVENT_DRAW:
		{
			UINT32 dwline = 0;
			UINT8* pData;
			UINT8* pBuf;
			UINT8  byRet,byLineLen;
			INT16  x,y;
			INT    i;

			//检查初始化是否成功
			if(bInit != SMPBRW_INITCODE)
				break;
			// 申请内存用于临时使用
			pBuf = MemAlloc(150);
			if(!pBuf)	return 1;
		
			/*搜索到当前行*/
			pData = handle->pData;
			while(dwline < dwTopLine)
			{				
				pData += SmpBrwGetLine(pData, handle->uWidth, wFontLib, &byRet);
				if(byRet<0)	return 1;
				dwline ++;
			}
			//画当前页
			GraphDisableRefresh();
			//清屏幕
			GraphClearRect(handle->uX,handle->uY,
						   handle->uX+handle->uWidth-1,
						   handle->uY+handle->uHeight-1);
			//画每一行数据
			x = handle->uX;
			y = handle->uY;
			for(i=0; i<wPageLine; i++)
			{
				//获取一行的长度
				byLineLen = (UINT8)SmpBrwGetLine(pData, handle->uWidth, wFontLib, &byRet);
				if(byRet < 0) return 1;
				//拷贝数据
				memcpy(pBuf, pData, byLineLen);
				*(pBuf+byLineLen) = 0x00;
				//画数据
				GraphDrawText(x,y,0,0, pBuf);
				//更新指针
				pData += byLineLen;
				//更新变量
				y += wLineSpace;
			}
			GraphEnableRefresh();
			if(pBuf)
			{
				MemFree(pBuf);
				pBuf = NULL;
			}
		}
		break;
	case EVENT_INITIALIZE:
		{
			INT16 x,y;
			UINT16 wid,hei;
			UINT16 wFonthi;
			INT    nData;
			/*初始化状态为失败*/
			SMPBRW_INIT = 0;
			x	= handle->uX;
			y	= handle->uY;
			wid	= handle->uWidth;
			hei = handle->uHeight;
			//验证参数合法性
			if(handle->pData == NULL)
				break;
			if(x > LCD_SCREEN_WIDTH || y > LCD_SCREEN_HEIGHT)
				break;
			if(x+wid > LCD_SCREEN_WIDTH)
				wid = LCD_SCREEN_WIDTH-x;
			if(y+hei > LCD_SCREEN_HEIGHT)
				hei = LCD_SCREEN_HEIGHT-y;
			//初始化变量
			handle->uWidth = wid;
			handle->uHeight = hei;
			//计算行高
			wFonthi = FontGetHeight(SYSTLIB);
			wFonthi += SMPBRW_LINESPACE;
			SMPBRW_LINEHI = (UINT8)wFonthi;
			//计算一页的行数
			if(hei < wFonthi)	//如果不足于放一行,返回失败
				break;
			SMPBRW_PAGELINE = (UINT8)(hei/wFonthi);
			//设置初始顶行
			SMPBRW_TOPLINE = 0;
			//搜索总行数
			nData = MsgSend2((APGUI_STRUCT_MODEL*)handle, 
										EVENT_COMMAND, CM_SMPBRW_SCANTOTAL);
			if(nData == -1)
				break;
			SMPBRW_TOTAL = (UINT32)nData;
			//初始化完毕
			SMPBRW_INIT = SMPBRW_INITCODE;
			nRet = 1;
			
		}
		break;

	case EVENT_DESTROY:
		break;

	}
	
	return nRet;
}


/****************************************************************************
	Function:
		SmpBrwGetLine
    Description:
		简单浏览器搜索一行数据
	input:
		pData	-		搜索行起始的位置
		wLineWidth	-	一行的宽度
		fontlib		-	字库

	output:
		*pRet	-		0		成功找到一行
						1		找到最后一行
						0xff	错误失败
    return 
				-		一行数据的长度
	note:
  ****************************************************************************
	高林辉				2006-4-14				创建						
****************************************************************************/
UINT16 SmpBrwGetLine(UINT8* pData, UINT16 wLineWidth, UINT16 fontlib,UINT8* pRet)
{
	UINT16 wCount = 0;
	UINT16 word;
	FontInfo fontinfo;
	UINT8* p;

	p = pData;
	*pRet = 0;
	
	if(!p)
	{
		*pRet = 0xff;
		return 0;
	}
	while(*p != 0)
	{
		if(*p&0x80)
		{
			word = MAKEWORD(*(p+1),*p);
			if(FontGetCharInfo(fontlib, word, &fontinfo, 0))
			{
				word = fontinfo.wFontWidth;
			}
			else
			{
				word = 2*FontGetAsciiWidth(fontlib,' ');
			}
			if(word+wCount > wLineWidth)
				break;
			wCount += word;
			p += 2;
		}
		else
		{
			//如果是回车,返回行结束
			if(*p == 0x0d)
			{
				p++;
				if(*p == 0x0a)
					p++;
				break;
			}
			if(*p == 0x0A)
			{
				p++;
				if(*p == 0xd)
					p++;
				break;
			}
			word = *p;
			if(FontGetCharInfo(fontlib, word, &fontinfo, 0))
			{
				word = fontinfo.wFontWidth;
			}
			else
			{
				word = FontGetAsciiWidth(fontlib,' ');
			}
			if(word+wCount > wLineWidth)
				break;
			wCount += word;
			p ++;
		}
	}
	if(*p == 0)
	{
		*pRet = 1;
	}
	return (UINT16)(p - pData);
}