Windows编程

开发平台：
Visual C++

QZVDemoView.cpp：源码内容
							// QZVDemoView.cpp
#include "stdafx.h"
#include "QZoomViewDemo.h"
#include "QZVDemoView.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#endif
#define ID_ZOOM_FIRST		ID_ZOOM_01
#define ID_ZOOM_LAST		ID_ZOOM_10
IMPLEMENT_DYNCREATE(CQZVDemoView, QZoomView)
BEGIN_MESSAGE_MAP(CQZVDemoView, QZoomView)
	ON_COMMAND(ID_TOOL_ZOOMIN, OnToolZoomin)
	ON_COMMAND(ID_TOOL_ZOOMOUT, OnToolZoomout)
	ON_COMMAND(ID_TOOL_HAND, OnToolHand)
	ON_UPDATE_COMMAND_UI(ID_TOOL_ZOOMIN, OnUpdateToolZoomin)
	ON_UPDATE_COMMAND_UI(ID_TOOL_ZOOMOUT, OnUpdateToolZoomout)
	ON_UPDATE_COMMAND_UI(ID_TOOL_HAND, OnUpdateToolHand)
	ON_COMMAND(ID_ZOOM_ZOOMIN, OnZoomZoomin)
	ON_COMMAND(ID_ZOOM_ZOOMOUT, OnZoomZoomout)
	ON_COMMAND(ID_VIEW_ZOOMTOWINDOW, OnViewZoomtowindow)
	ON_COMMAND_RANGE(ID_ZOOM_FIRST, ID_ZOOM_LAST, OnZoom)
	ON_UPDATE_COMMAND_UI_RANGE(ID_ZOOM_FIRST, ID_ZOOM_LAST, OnUpdateZoom)
	ON_UPDATE_COMMAND_UI(ID_INDICATOR_ZOOM, OnUpdateIndicatorZoom)
	ON_COMMAND(ID_ZOOM_OTHER, OnZoomOther)
	ON_UPDATE_COMMAND_UI(ID_ZOOM_ZOOMIN, OnUpdateZoomZoomin)
	ON_UPDATE_COMMAND_UI(ID_ZOOM_ZOOMOUT, OnUpdateZoomZoomout)
END_MESSAGE_MAP()
CQZVDemoView::CQZVDemoView()
: m_CurrentMode(ZoomViewOff)
{
}
CQZVDemoView::~CQZVDemoView()
{
}
void CQZVDemoView::OnDraw(CDC* pDC)
{
	CSize szDoc(GetTotalSize());
	pDC->SetWindowOrg(0, szDoc.cy);
	CRect rcDoc(0, 0, szDoc.cx, szDoc.cy);
	pDC->Rectangle(rcDoc);
	CBrush brYellow(RGB(255, 255, 64));
	CBrush brSienna(RGB(128, 0, 0));
	CPen pen(PS_SOLID, 10, RGB(128, 0, 0));
	LOGFONT lf;
	::ZeroMemory(& lf, sizeof(LOGFONT));
	_tcscpy(lf.lfFaceName, _T("Georgia"));
	lf.lfHeight = 60;
	lf.lfWeight = FW_BOLD;
	CFont font;
	font.CreateFontIndirect(& lf);
	CBrush * pOldBrush = (CBrush *) pDC->SelectObject(& brYellow);
	CPen * pOldPen = (CPen *) pDC->SelectObject(& pen);
	CFont * pOldFont = (CFont *) pDC->SelectObject(& font);
	pDC->Ellipse(200, 350, 600, 750);
	pDC->SelectObject(& brSienna);
	CRect rcEye(0, 0, 0, 0);
	rcEye.InflateRect(10, 10);
	rcEye.OffsetRect(330, 570);
	pDC->Ellipse(rcEye);
	rcEye.OffsetRect(140, 0);
	pDC->Ellipse(rcEye);
	CRect rcMouth(0, 0, 0, 0);
	rcMouth.InflateRect(60, 60);
	rcMouth.OffsetRect(400, 520);
	pDC->Arc(rcMouth, CPoint(340, 480), CPoint(460, 480));
	CString sHello(_T("Hello world!"));
	pDC->SetTextAlign(TA_CENTER);
	pDC->SetTextColor(RGB(192, 64, 0));
	pDC->TextOut(400, 280, sHello);
	lf.lfHeight = 36;
	lf.lfWeight = FW_NORMAL;
	CFont fontZoom;
	fontZoom.CreateFontIndirect(& lf);
	pDC->SelectObject(& fontZoom);
	pDC->SetTextColor(RGB(0, 0, 0));
	CString sZoom;
	sZoom.Format(_T("Zoom factor: %.2f"), GetZoom());
	pDC->TextOut(400, 180, sZoom);
	if (pOldFont) pDC->SelectObject(pOldFont);
	if (pOldPen) pDC->SelectObject(pOldPen);
	if (pOldBrush) pDC->SelectObject(pOldBrush);
}
void CQZVDemoView::OnInitialUpdate()
{
	// Initialize QZoomView
	// Be a good programmer and call the base class.
	QZoomView::OnInitialUpdate();
	// Load the cursors. If you don't, QZoomView will display only the normal
	// arrow cursor.
	// The cursor loading might as well (or even preferably) be done in the
	// InitInstance() function of the application class, as it should be done only
	// once per program instance. But this doesn't hurt.
	UINT idCursors[] = 
	{
		IDC_LOUPE, IDC_LOUPEPLUS, IDC_LOUPEMINUS, IDC_GRIPOPEN, IDC_GRIPCLOSED
	};
	for (int i = 0; i < sizeof(idCursors) / sizeof(UINT); i++)
		VERIFY(LoadCursor(i, idCursors[i]));
	// Optionally, set another list of zoom presets than the default.
	float PresetZoomFactors[] =
	{
		0.35f, 0.5f, 0.7f, 1.0f, 1.4f, 2.0f, 2.8f, 4.0f, 5.6f, 8.0f
	};
	int nPresets(sizeof(PresetZoomFactors) / sizeof(float));
	SetPresets(PresetZoomFactors, nPresets);
	// Set the document size as you would do for a normal CScrollView and use
	// any fixed scale mapping mode (MM_ISOTROPIC and MM_ANISOTROPIC are not allowed).
	// Here we choose MM_LOMETRIC and a document size of 80 x 100 millimeters.
	CSize sizeTotal(800, 1000);
	SetScrollSizes(MM_LOMETRIC, sizeTotal);
	// For demonstration purposes, start with Zoom In tool activated.
	OnToolZoomin();
}
void CQZVDemoView::OnToolZoomin()
{
	SetZoomMode(ZoomViewZoomIn);
	m_CurrentMode = ZoomViewZoomIn;
}
void CQZVDemoView::OnToolZoomout()
{
	SetZoomMode(ZoomViewZoomOut);
	m_CurrentMode = ZoomViewZoomOut;
}
void CQZVDemoView::OnToolHand()
{
	SetZoomMode(ZoomViewDrag);
	m_CurrentMode = ZoomViewDrag;
}
void CQZVDemoView::OnUpdateToolZoomin(CCmdUI *pCmdUI)
{
	pCmdUI->SetCheck(m_CurrentMode == ZoomViewZoomIn);
}
void CQZVDemoView::OnUpdateToolZoomout(CCmdUI *pCmdUI)
{
	pCmdUI->SetCheck(m_CurrentMode == ZoomViewZoomOut);
}
void CQZVDemoView::OnUpdateToolHand(CCmdUI *pCmdUI)
{
	pCmdUI->SetCheck(m_CurrentMode == ZoomViewDrag);
}
void CQZVDemoView::OnZoomZoomin()
{
	ZoomIn();
}
void CQZVDemoView::OnZoomZoomout()
{
	ZoomOut();
}
void CQZVDemoView::OnViewZoomtowindow()
{
	ZoomToWindow();
}
void CQZVDemoView::OnZoom(UINT nID)
{
	ZoomToPreset(nID - ID_ZOOM_FIRST);
}
void CQZVDemoView::OnUpdateZoom(CCmdUI *pCmdUI)
{
	pCmdUI->SetCheck(pCmdUI->m_nID - ID_ZOOM_FIRST == (UINT) GetPresetZoom());
}
void CQZVDemoView::OnZoomOther()
{
	CZoomLevelDlg dlg;
	dlg.m_ZoomPercentage = (int)(100.0f * GetZoom());
	if (dlg.DoModal() == IDOK)
	{
		ZoomTo((float) dlg.m_ZoomPercentage / 100.0f);
		CSize szDocument = GetTotalSize();
		ScrollToCenter(CPoint(szDocument.cx / 2, - szDocument.cy / 2));
	}
}
void CQZVDemoView::OnUpdateIndicatorZoom(CCmdUI *pCmdUI)
{
	// Indicate the zoom level on the status bar.
	// See the MFC documentation for CStatusBar and the global variable
	// 'indicators' in MainFrm.cpp if this looks unfamiliar.
	CString sZoom;
	sZoom.Format(_T("%.2f%%"), 100.0f * GetZoom());
	pCmdUI->SetText(sZoom);
	pCmdUI->Enable();
}
//===========================
// CZoomLevelDlg dialog
IMPLEMENT_DYNAMIC(CZoomLevelDlg, CDialog)
BEGIN_MESSAGE_MAP(CZoomLevelDlg, CDialog)
END_MESSAGE_MAP()
CZoomLevelDlg::CZoomLevelDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CZoomLevelDlg::IDD, pParent)
	, m_ZoomPercentage(0)
{
}
CZoomLevelDlg::~CZoomLevelDlg()
{
}
void CZoomLevelDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	DDX_Text(pDX, IDC_ZOOMEDIT, m_ZoomPercentage);
	DDV_MinMaxInt(pDX, m_ZoomPercentage, 3, 2000);
	DDX_Control(pDX, IDC_ZOOMSPIN, m_ZoomSpin);
}
BOOL CZoomLevelDlg::OnInitDialog()
{
	CDialog::OnInitDialog();
	m_ZoomSpin.SetRange(3, 2000);
	return TRUE;
}
void CQZVDemoView::OnUpdateZoomZoomin(CCmdUI *pCmdUI)
{
	pCmdUI->Enable(CanZoomIn());
}
void CQZVDemoView::OnUpdateZoomZoomout(CCmdUI *pCmdUI)
{
	pCmdUI->Enable(CanZoomOut());
}

						