自学教程：C++ GetView函数代码示例

// If the button in the command bar is clicked, then this function will be called// virtual BOOL S2_CrvLineSegCmd::OnExecute(){	// Initialize	FW_Cmd::OnExecute();	// Get active view	FW_View* pView = GetView();	if(!pView)		return FALSE;	// Get root node	GR_DLNode* pDLNode = pView->GetDLNode();	if(!pDLNode)		return FALSE;	m_pDLNodeSketch2D = GR_DLNodeSketch2D::GetActive(pDLNode);	if(!m_pDLNodeSketch2D)		return FALSE;	m_pPtPrevious	= NULL;	m_pDLCrvPreview	= NULL;	return TRUE;}

LRESULT CSimpleGraph::OnMouseHover(WPARAM, LPARAM lp){	CPoint pt(LOWORD(lp), HIWORD(lp));  // client window coords	CHexEditView *pv = GetView();	ASSERT(pv != NULL);	m_bar = get_bar(pt);	if (m_bar > -1 && !m_tip.IsWindowVisible())	{		// Update the tip info		m_tip.Clear();		CString ss;		if (theApp.hex_ucase_)			ss.Format("Byte: %d [%02.2Xh] %s", m_bar, m_bar, pv->DescChar(m_bar));		else			ss.Format("Byte: %d [%02.2xh] %s", m_bar, m_bar, pv->DescChar(m_bar));		m_tip.AddString(ss);		char buf[32];                   // used with sprintf (CString::Format can't handle __int64)		sprintf(buf, "%I64d", m_val[m_bar]);		ss = buf;		AddCommas(ss);		m_tip.AddString("Count: " +ss);		// Work out the tip window display position and move the tip window there		CPoint tip_pt = pt + CSize(16, 16);		ClientToScreen(&tip_pt);		m_tip.Move(tip_pt, false);		m_tip.Show();		track_mouse(TME_LEAVE);		return 0;  // return 0 to say we processed it	}	return 1;}

//-----------------------------------------------------------------------------// Purpose: Sets view parameters for level overview mode// Input  : *rect - //-----------------------------------------------------------------------------void CViewRender::SetUpOverView(){	static int oldCRC = 0;    CViewSetup &view = GetView ( STEREO_EYE_MONO );	view.m_bOrtho = true;	float aspect = (float)view.width/(float)view.height;	int size_y = 1024.0f * cl_leveloverview.GetFloat(); // scale factor, 1024 = OVERVIEW_MAP_SIZE	int	size_x = size_y * aspect;	// standard screen aspect 	view.origin.x -= size_x / 2;	view.origin.y += size_y / 2;	view.m_OrthoLeft   = 0;	view.m_OrthoTop    = -size_y;	view.m_OrthoRight  = size_x;	view.m_OrthoBottom = 0;	view.angles = QAngle( 90, 90, 0 );	// simple movement detector, show position if moved	int newCRC = view.origin.x + view.origin.y + view.origin.z;	if ( newCRC != oldCRC )	{		Msg( "Overview: scale %.2f, pos_x %.0f, pos_y %.0f/n", cl_leveloverview.GetFloat(),			view.origin.x, view.origin.y );		oldCRC = newCRC;	}	CMatRenderContextPtr pRenderContext( materials );	pRenderContext->ClearColor4ub( 0, 255, 0, 255 );	// render->DrawTopView( true );}

Ray Camera::GetScreenRay(float x, float y) const{    Ray ret;    // If projection is invalid, just return a ray pointing forward    if (!IsProjectionValid())    {        ret.origin_ = node_ ? node_->GetWorldPosition() : Vector3::ZERO;        ret.direction_ = node_ ? node_->GetWorldDirection() : Vector3::FORWARD;        return ret;    }    Matrix4 viewProjInverse = (GetProjection(false) * GetView()).Inverse();    // The parameters range from 0.0 to 1.0. Expand to normalized device coordinates (-1.0 to 1.0) & flip Y axis    x = 2.0f * x - 1.0f;    y = 1.0f - 2.0f * y;    Vector3 near(x, y, 0.0f);    Vector3 far(x, y, 1.0f);    ret.origin_ = viewProjInverse * near;    ret.direction_ = ((viewProjInverse * far) - ret.origin_).Normalized();    return ret;}

BOOL DTransformScale::OnSetActive() {//	return DTransformScale::OnSetActive();	GView *view = GetView();	// make translation event handler active 	GMoveTransformHandler *h = new GMoveTransformHandler(view);	h->SetMapMode(m_type);	h->SetTransformMode(GMoveTransformHandler::MODE_SCALE);	h->SetDialog(this);	h->SetAxes(GetAxes());	h->scaleUniform = m_uniform;	h->ref();	m_pView->Message("Select and drag scales object"); 	m_handler = h;    view->PushEventHandler(h);		return CPropertyPage::OnSetActive();}

// Sends the bitmap extracted from the View window to a printer of your choice// This function provides a useful reference for printing bitmaps in generalvoid CDoc::Print(){	// Get the dimensions of the View window	CRect rcView = GetView().GetClientRect();	int Width = rcView.Width();	int Height = rcView.Height();	// Copy the bitmap from the View window	CClientDC ViewDC(GetView());	CMemDC MemDC(ViewDC);	CBitmap bmView;	bmView.CreateCompatibleBitmap(ViewDC, Width, Height);	MemDC.SelectObject(bmView);	MemDC.BitBlt(0, 0, Width, Height, ViewDC, 0, 0, SRCCOPY);	CPrintDialog PrintDlg;	try	{		// Bring up a dialog to choose the printer		if (PrintDlg.DoModal(GetView()) == IDOK)	// throws exception if there is no default printer		{			// Zero and then initialize the members of a DOCINFO structure.			DOCINFO di;			memset(&di, 0, sizeof(DOCINFO));			di.cbSize = sizeof(DOCINFO);			di.lpszDocName = _T("Scribble Printout");			di.lpszOutput = (LPTSTR)NULL;			di.lpszDatatype = (LPTSTR)NULL;			di.fwType = 0;			// Begin a print job by calling the StartDoc function.			CDC dcPrint = PrintDlg.GetPrinterDC();			if (SP_ERROR == StartDoc(dcPrint, &di))				throw CUserException(_T("Failed to start print job"));			// Inform the driver that the application is about to begin sending data.			if (0 > StartPage(dcPrint))				throw CUserException(_T("StartPage failed"));			BITMAPINFOHEADER bi;			ZeroMemory(&bi, sizeof(BITMAPINFOHEADER));			bi.biSize = sizeof(BITMAPINFOHEADER);			bi.biHeight = Height;			bi.biWidth = Width;			bi.biPlanes = 1;			bi.biBitCount = 24;			bi.biCompression = BI_RGB;			// Note: BITMAPINFO and BITMAPINFOHEADER are the same for 24 bit bitmaps			// Get the size of the image data			MemDC.GetDIBits(bmView, 0, Height, NULL, reinterpret_cast<BITMAPINFO*>(&bi), DIB_RGB_COLORS);			// Retrieve the image data			std::vector<byte> vBits(bi.biSizeImage, 0);	// a vector to hold the byte array			byte* pByteArray = &vBits.front();			MemDC.GetDIBits(bmView, 0, Height, pByteArray, reinterpret_cast<BITMAPINFO*>(&bi), DIB_RGB_COLORS);			// Determine the scaling factors required to print the bitmap and retain its original proportions.			float fLogPelsX1 = (float)ViewDC.GetDeviceCaps(LOGPIXELSX);			float fLogPelsY1 = (float)ViewDC.GetDeviceCaps(LOGPIXELSY);			float fLogPelsX2 = (float)GetDeviceCaps(dcPrint, LOGPIXELSX);			float fLogPelsY2 = (float)GetDeviceCaps(dcPrint, LOGPIXELSY);			float fScaleX = MAX(fLogPelsX1, fLogPelsX2) / MIN(fLogPelsX1, fLogPelsX2);			float fScaleY = MAX(fLogPelsY1, fLogPelsY2) / MIN(fLogPelsY1, fLogPelsY2);			// Compute the coordinates of the upper left corner of the centered bitmap.			int cWidthPels = GetDeviceCaps(dcPrint, HORZRES);			int xLeft = ((cWidthPels / 2) - ((int)(((float)Width) * fScaleX)) / 2);			int cHeightPels = GetDeviceCaps(dcPrint, VERTRES);			int yTop = ((cHeightPels / 2) - ((int)(((float)Height) * fScaleY)) / 2);			// Use StretchDIBits to scale the bitmap and maintain its original proportions			if (GDI_ERROR == (UINT)StretchDIBits(dcPrint, xLeft, yTop, (int)((float)Width * fScaleX),				(int)((float)Height * fScaleY), 0, 0, Width, Height, pByteArray, reinterpret_cast<BITMAPINFO*>(&bi), DIB_RGB_COLORS, SRCCOPY))			{				throw CUserException(_T("Failed to resize image for printing"));			}			// Inform the driver that the page is finished.			if (0 > EndPage(dcPrint))				throw CUserException(_T("EndPage failed"));			// Inform the driver that document has ended.			if (0 > EndDoc(dcPrint))				throw CUserException(_T("EndDoc failed"));		}	}	catch (const CException& e)	{		// Display a message box indicating why printing failed.		CString strMsg = CString(e.GetText()) + CString("/n") + e.GetErrorString();		CString strType = CString(e.what());		::MessageBox(NULL, strMsg, strType, MB_ICONWARNING);	}}

void CGUIViewControl::SetCurrentView(int viewMode, bool bRefresh /* = false */){    // grab the previous control    CGUIControl *previousView = NULL;    if (m_currentView >= 0 && m_currentView < (int)m_visibleViews.size())        previousView = m_visibleViews[m_currentView];    UpdateViewVisibility();    // viewMode is of the form TYPE << 16 | ID    VIEW_TYPE type = (VIEW_TYPE)(viewMode >> 16);    int id = viewMode & 0xffff;    // first find a view that matches this view, if possible...    int newView = GetView(type, id);    if (newView < 0) // no suitable view that matches both id and type, so try just type        newView = GetView(type, 0);    if (newView < 0 && type == VIEW_TYPE_BIG_ICON) // try icon view if they want big icon        newView = GetView(VIEW_TYPE_ICON, 0);    if (newView < 0 && type == VIEW_TYPE_BIG_INFO)        newView = GetView(VIEW_TYPE_INFO, 0);    if (newView < 0) // try a list view        newView = GetView(VIEW_TYPE_LIST, 0);    if (newView < 0) // try anything!        newView = GetView(VIEW_TYPE_NONE, 0);    if (newView < 0)        return;    m_currentView = newView;    CGUIControl *pNewView = m_visibleViews[m_currentView];    // make only current control visible...    for (ciViews view = m_allViews.begin(); view != m_allViews.end(); ++view)        (*view)->SetVisible(false);    pNewView->SetVisible(true);    if (!bRefresh && pNewView == previousView)        return; // no need to actually update anything (other than visibility above)//  CLog::Log(LOGDEBUG,"SetCurrentView: Oldview: %i, Newview :%i", m_currentView, viewMode);    bool hasFocus(false);    int item = -1;    if (previousView)    {   // have an old view - let's clear it out and hide it.        hasFocus = previousView->HasFocus();        item = GetSelectedItem(previousView);        CGUIMessage msg(GUI_MSG_LABEL_RESET, m_parentWindow, previousView->GetID());        previousView->OnMessage(msg);    }    // Update it with the contents    UpdateContents(pNewView, item);    // and focus if necessary    if (hasFocus)    {        CGUIMessage msg(GUI_MSG_SETFOCUS, m_parentWindow, pNewView->GetID(), 0);        g_windowManager.SendMessage(msg, m_parentWindow);    }    UpdateViewAsControl(((IGUIContainer *)pNewView)->GetLabel());}

	void GameObject::Draw(){		//ゲ
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