Symbian 实现基于传统架构场景切换动画

核心提示：CFbsBitmapDevice * iDevice = CFbsBitmapDevice::NewL(iBitmap);CleanupStack: ushL(iDevice);// 创建位图设备的绘图上下文CFbsBitGc * gc = NULL;User: eaveIfError(iDevice->Crea

CFbsBitmapDevice * iDevice = CFbsBitmapDevice::NewL(iBitmap);

CleanupStack: ushL(iDevice);

// 创建位图设备的绘图上下文

CFbsBitGc * gc = NULL;

User: eaveIfError(iDevice->CreateContext(gc));

CleanupStack: ushL(gc);

// SetGc()函数所使用的绘图上下文必须是指向窗口的，因此，必须对gc做一下映射(mapping)

CWindowToBitmapMappingGc *wbgc = CWindowToBitmapMappingGc::NewL(*iScreenDevice,*gc) ;

CleanupStack: ushL(wbgc);

// 这个是自己定义的函数，对每个控件以及它的所有子控件设置GC

SetGc(iScreen,wbgc);

// 调用重绘，此时，控件绘制到了位图上

iScreen->DrawNow();

// 绘制完之后，设置回原来的GC

SetGc(iScreen,NULL);

CleanupStack: opAndDestroy(wbgc);

CleanupStack: opAndDestroy(gc);

CleanupStack::PopAndDestroy(iDevice);

CleanupStack::Pop(iBitmap);

}

/**

* 为每一控件以及它的所有子控件重新设置gc

*/

void SetGc(CCoeControl * iControl,CWindowToBitmapMappingGc* wsgc){

iControl ->SetGc(wsgc);

TInt count = iControl->CountComponentControls();

if(count == 0){

return;

}

for(TInt index = 0; index < count; ++index){

SetGc(iControl->ComponentControl(index),wsgc);

}

}

/**

* 将一个界面绘制到位图上

*/

void DrowScreenInBitmap(CCoeControl* iScreen,CFbsBitmap * iBitmap){

CleanupStack::PushL(iBitmap);

// 获得屏幕设备

CWsScreenDevice * iScreenDevice = CEikonEnv::Static()->ScreenDevice();

//建立位图设备

CFbsBitmapDevice * iDevice = CFbsBitmapDevice::NewL(iBitmap);

CleanupStack::PushL(iDevice);

// 创建位图设备的绘图上下文

CFbsBitGc * gc = NULL;

User: eaveIfError(iDevice->CreateContext(gc));