style.h

实现了图像的切换效果,包括飞入飞出,雨滴效果,水平交错,百页窗效果,是symbian学习的好例子.

#ifndef STYLE_H_
#define STYLE_H_
#include <e32math.h>
#include <fbs.h>

/*
Need to include these lib

LIBRARY        bitgdi.lib

*/
#endif /*STYLE_H_*/

/*--------------------雨滴效果--------------------*/

void rain(CFbsBitmap* aNextBitmap, CFbsBitmap* aMemBitmap, TInt screenWidth = 240, TInt screenHeight = 320)
{
	CFbsBitmapDevice *bitDev = CFbsBitmapDevice::NewL(aMemBitmap);
	CleanupStack::PushL(bitDev);
	CFbsBitGc *bitGc;
	User::LeaveIfError( bitDev->CreateContext(bitGc));
	//算法开始
	TInt i;
	TInt j;
	TInt k = screenHeight / 2;
	for(i=0; i<=screenHeight; ++i ) 
	{
		for(j=0; j<=screenHeight-i; ++j )
		{
			bitGc->DrawBitmap(TRect(TPoint(0, j), TSize(screenWidth,1)),
					aNextBitmap,
					TRect(TPoint(0,screenHeight-i),TSize(screenWidth,1)));
			if(j % k == 0)
			{
				DrawNow();
			}
		}
	}
	
	//算法结束
	CleanupStack::PopAndDestroy();
	if(bitGc)
	{
		delete bitGc;
	}
}


/*--------------------积木效果--------------------*/
void brick(CFbsBitmap* aNextBitmap, CFbsBitmap* aMemBitmap, TInt screenWidth = 240, TInt screenHeight = 320)
{
	CFbsBitmapDevice *bitDev = CFbsBitmapDevice::NewL(aMemBitmap);
	CleanupStack::PushL(bitDev);
	CFbsBitGc *bitGc;
	User::LeaveIfError( bitDev->CreateContext(bitGc));
	
	//算法开始
	TInt i;
	TInt j;
	TInt stepx;
	TInt stepy;
	TInt dispnum;
	TInt x;
	TInt y;
	const TInt KNUM = 20;
	TInt nummax =KNUM * KNUM;
	TBool pxy[KNUM][KNUM];
	for ( i=0; i<KNUM; ++i )
	{
		for ( j=0; j<KNUM; ++j )
		{
			pxy[i][j] = EFalse; 
		}
	}
	stepx = screenWidth / KNUM;
	stepy = screenHeight / KNUM;
	TTime time;
    time.HomeTime();
    TInt64 aSeed=time.Int64();
	//srand( (unsigned)time( NULL ) );
	dispnum = 0;
	while(1) 
	{
		x= Math::Rand(aSeed) % KNUM; 
		y= Math::Rand(aSeed) % KNUM; 
		if ( pxy[x][y] ) 
			//本组x,y所代表的数据组是否已显示过? 
			continue; 
		pxy[x][y] = ETrue; 
		//表明本组x,y所代表的数据组已显示过 
		bitGc->DrawBitmap(TRect(TPoint(x*stepx, y*stepy), TSize(stepx,stepy)),
				aNextBitmap,
				TRect(TPoint(x*stepx, y*stepy),TSize(stepx, stepy)));
		if(dispnum%2 == 0)
		{
			DrawNow();
		}
		dispnum++;
		if ( dispnum >= nummax) 
			break;
	}
	//算法结束
	CleanupStack::PopAndDestroy();
	if(bitGc)
	{
		delete bitGc;
	}
}


/*--------------------百叶窗效果--------------------*/
void shutter(CFbsBitmap* aNextBitmap, CFbsBitmap* aMemBitmap, TInt screenWidth = 240, TInt screenHeight = 320)
{
	CFbsBitmapDevice *bitDev = CFbsBitmapDevice::NewL(aMemBitmap);
	CleanupStack::PushL(bitDev);
	CFbsBitGc *bitGc;
	User::LeaveIfError( bitDev->CreateContext(bitGc));
	
	//算法开始
	TInt i;
	TInt j;
	TInt stepi;
	stepi=screenHeight / 10;
	for ( i=0; i<=stepi; ++i )
	{
		for ( j=0; j<10; ++j )
		{
			bitGc->DrawBitmap(TRect(TPoint(0, j*stepi+i), TSize(screenWidth, 1)),
					aNextBitmap,
					TRect(TPoint(0,j*stepi+i),TSize(screenWidth, 1)));
			if(j % 2 == 0)
			{
				DrawNow();
			}
		}
	}
	//算法结束
	CleanupStack::PopAndDestroy();
	if(bitGc)
	{
		delete bitGc;
	}
}


/*--------------------水平交错效果--------------------*/
void horizontal(CFbsBitmap* aNextBitmap, CFbsBitmap* aMemBitmap, TInt screenWidth = 240, TInt screenHeight = 320)
{
	CFbsBitmapDevice *bitDev = CFbsBitmapDevice::NewL(aMemBitmap);
	CleanupStack::PushL(bitDev);
	CFbsBitGc *bitGc;
	User::LeaveIfError( bitDev->CreateContext(bitGc));
	
	//算法开始
	TInt i;
	TInt j;
	for(i=0; i <= screenHeight; i+=2)
	{
		j = i;
		while(j > 0)
		{
			bitGc->DrawBitmap(TRect(TPoint(0, j-1), TSize(screenWidth,1)),
					aNextBitmap,
					TRect(TPoint(0,screenHeight-(i-j-1)),TSize(screenWidth,1)));
			bitGc->DrawBitmap(TRect(TPoint(0, screenHeight-j), TSize(screenWidth,1)),
					aNextBitmap,
					TRect(TPoint(0,i-j),TSize(screenWidth,1)));
			j-=2;
			if(j % 100 == 0)
			{
				DrawNow();
			}		
		}	
	}
	//算法结束
	CleanupStack::PopAndDestroy();
	if(bitGc)
	{
		delete bitGc;
	}
}
//end of file