MFC第八天
浏览数：35 /
时间：2015年06月08日
mfc绘图
绘图对象的使用,
CBitmap 使用
创建于当前dc的兼容dc (内存中数据结构一样)
将位图选入兼容dc
将位图从兼容dc拷贝到当前dc
将位图从兼容dc中选出，恢复位图
删除兼容dc
删除位图对象
CRgn 复杂区域
创建几何区域
CRgn::CreateXXX
将两个几何区域进行运算，可以多次运算
CRgn::CombineRgn
填充区域
CDC::FillRgn
填充边框
CDC::FrameRgn
CWnd::SetWindowRgn 创建不规则窗口，按钮
CPalette 调色板,用来设置颜色,减少
MFC集合类
Arrays 动态数组
CArrays 模板类
Lists 链表(双向链表)
CList 模板类
Maps 映射
CMap 模板类
模板类 存储自定义类型的数据
非模板类 存储特定类型的数据
CArray
使用: 定义
template< class TYPE, class ARG_TYPE > class CArray : public CObject
TYPE 要存储的元素的类型
ARG_TYPE CArray成员函数的参数类型
自定义的类需要，偶人构造，或者有默认的参数
集合会不时的调用默认构造
要预计要存储的元素的数量,设置数组的初始大小
CList
定义 参数与CArray相同
POSITION Find( ARG_TYPE searchValue, POSITION startAfter = NULL) const;
调用Find函数需要重载==运算符
template< class KEY, class ARG_KEY, class VALUE, class ARG_VALUE >
class CMap : public CObject
查找元素 根据键查找值
Lookup
***************************
key-->hashCode
nIndex=hashCode%nSize
*****************************************
template<class KEY, class ARG_KEY, class VALUE, class ARG_VALUE>
class CMap : public CObject
{
protected:
// Association
struct CAssoc
{
CAssoc* pNext; //链表
UINT nHashValue; // needed for efficient iteration
KEY key;
VALUE value;
};
public:
// Construction
CMap(int nBlockSize = 10);
// Attributes
// number of elements
int GetCount() const;
BOOL IsEmpty() const;
// Lookup
BOOL Lookup(ARG_KEY key, VALUE& rValue) const;
// Operations
// Lookup and add if not there
VALUE& operator[](ARG_KEY key);
// add a new (key, value) pair
void SetAt(ARG_KEY key, ARG_VALUE newValue);
// removing existing (key, ?) pair
BOOL RemoveKey(ARG_KEY key);
void RemoveAll();
// iterating all (key, value) pairs
POSITION GetStartPosition() const;
void GetNextAssoc(POSITION& rNextPosition, KEY& rKey, VALUE& rValue) const;
// advanced features for derived classes
UINT GetHashTableSize() const;
void InitHashTable(UINT hashSize, BOOL bAllocNow = TRUE);
// Implementation
protected:
CAssoc** m_pHashTable;
UINT m_nHashTableSize;
int m_nCount;
CAssoc* m_pFreeList;
struct CPlex* m_pBlocks;
int m_nBlockSize;
CAssoc* NewAssoc();
void FreeAssoc(CAssoc*);
CAssoc* GetAssocAt(ARG_KEY, UINT&) const;
public:
~CMap();
void Serialize(CArchive&);
#ifdef _DEBUG
void Dump(CDumpContext&) const;
void AssertValid() const;
#endif
};
源代码
// MainFrm.cpp : implementation of the CMainFrame class
//
#include "stdafx.h"
#include "MFCDraw.h"
#include "MainFrm.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CMainFrame
IMPLEMENT_DYNCREATE(CMainFrame, CFrameWnd)
BEGIN_MESSAGE_MAP(CMainFrame, CFrameWnd)
//{{AFX_MSG_MAP(CMainFrame)
// NOTE - the ClassWizard will add and remove mapping macros here.
// DO NOT EDIT what you see in these blocks of generated code !
ON_WM_CREATE()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
static UINT indicators[] =
{
ID_SEPARATOR, // status line indicator
ID_INDICATOR_CAPS,
ID_INDICATOR_NUM,
ID_INDICATOR_SCRL,
};
/////////////////////////////////////////////////////////////////////////////
// CMainFrame construction/destruction
CMainFrame::CMainFrame()
{
// TODO: add member initialization code here
}
CMainFrame::~CMainFrame()
{
}
int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CFrameWnd::OnCreate(lpCreateStruct) == -1)
return -1;
if (!m_wndToolBar.CreateEx(this, TBSTYLE_FLAT, WS_CHILD | WS_VISIBLE | CBRS_TOP
| CBRS_GRIPPER | CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC) ||
!m_wndToolBar.LoadToolBar(IDR_MAINFRAME))
{
TRACE0("Failed to create toolbar\n");
return -1; // fail to create
}
if (!m_wndStatusBar.Create(this) ||
!m_wndStatusBar.SetIndicators(indicators,
sizeof(indicators)/sizeof(UINT)))
{
TRACE0("Failed to create status bar\n");
return -1; // fail to create
}
// TODO: Delete these three lines if you don't want the toolbar to
// be dockable
m_wndToolBar.EnableDocking(CBRS_ALIGN_ANY);
EnableDocking(CBRS_ALIGN_ANY);
DockControlBar(&m_wndToolBar);
return 0;
}
BOOL CMainFrame::PreCreateWindow(CREATESTRUCT& cs)
{
if( !CFrameWnd::PreCreateWindow(cs) )
return FALSE;
// TODO: Modify the Window class or styles here by modifying
// the CREATESTRUCT cs
return TRUE;
}
/////////////////////////////////////////////////////////////////////////////
// CMainFrame diagnostics
#ifdef _DEBUG
void CMainFrame::AssertValid() const
{
CFrameWnd::AssertValid();
}
void CMainFrame::Dump(CDumpContext& dc) const
{
CFrameWnd::Dump(dc);
}
#endif //_DEBUG
/////////////////////////////////////////////////////////////////////////////
// CMainFrame message handlers
// MFCDraw.cpp : Defines the class behaviors for the application.
//
#include "stdafx.h"
#include "MFCDraw.h"
#include "MainFrm.h"
#include "MFCDrawDoc.h"
#include "MFCDrawView.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CMFCDrawApp
BEGIN_MESSAGE_MAP(CMFCDrawApp, CWinApp)
//{{AFX_MSG_MAP(CMFCDrawApp)
ON_COMMAND(ID_APP_ABOUT, OnAppAbout)
// NOTE - the ClassWizard will add and remove mapping macros here.
// DO NOT EDIT what you see in these blocks of generated code!
//}}AFX_MSG_MAP
// Standard file based document commands
ON_COMMAND(ID_FILE_NEW, CWinApp::OnFileNew)
ON_COMMAND(ID_FILE_OPEN, CWinApp::OnFileOpen)
// Standard print setup command
ON_COMMAND(ID_FILE_PRINT_SETUP, CWinApp::OnFilePrintSetup)
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CMFCDrawApp construction
CMFCDrawApp::CMFCDrawApp()
{ // TODO: add construction code here,
// Place all significant initialization in InitInstance
}
/////////////////////////////////////////////////////////////////////////////
// The one and only CMFCDrawApp object
CMFCDrawApp theApp;
/////////////////////////////////////////////////////////////////////////////
// CMFCDrawApp initialization
BOOL CMFCDrawApp::InitInstance()
{
AfxEnableControlContainer();
// Standard initialization
// If you are not using these features and wish to reduce the size
// of your final executable, you should remove from the following
// the specific initialization routines you do not need.
#ifdef _AFXDLL
Enable3dControls(); // Call this when using MFC in a shared DLL
#else
Enable3dControlsStatic(); // Call this when linking to MFC statically
#endif
// Change the registry key under which our settings are stored.
// TODO: You should modify this string to be something appropriate
// such as the name of your company or organization.
SetRegistryKey(_T("Local AppWizard-Generated Applications"));
LoadStdProfileSettings(); // Load standard INI file options (including MRU)
// Register the application's document templates. Document templates
// serve as the connection between documents, frame windows and views.
CSingleDocTemplate* pDocTemplate;
pDocTemplate = new CSingleDocTemplate(
IDR_MAINFRAME,
RUNTIME_CLASS(CMFCDrawDoc),
RUNTIME_CLASS(CMainFrame), // main SDI frame window
RUNTIME_CLASS(CMFCDrawView));
AddDocTemplate(pDocTemplate);
// Parse command line for standard shell commands, DDE, file open
CCommandLineInfo cmdInfo;
ParseCommandLine(cmdInfo);
// Dispatch commands specified on the command line
if (!ProcessShellCommand(cmdInfo))
return FALSE;
// The one and only window has been initialized, so show and update it.
m_pMainWnd->ShowWindow(SW_SHOW);
m_pMainWnd->UpdateWindow();
return TRUE;
}
/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About
class CAboutDlg : public CDialog
{
public:
CAboutDlg();
// Dialog Data
//{{AFX_DATA(CAboutDlg)
enum { IDD = IDD_ABOUTBOX };
//}}AFX_DATA
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CAboutDlg)
protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
//}}AFX_VIRTUAL
// Implementation
protected:
//{{AFX_MSG(CAboutDlg)
afx_msg void OnDcCpen();
afx_msg void OnDcGdibrush();
afx_msg void OnDcGdifont();
afx_msg void OnDcGdipen();
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
//{{AFX_DATA_INIT(CAboutDlg)
//}}AFX_DATA_INIT
}
void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CAboutDlg)
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
//{{AFX_MSG_MAP(CAboutDlg)
// ON_COMMAND(ID_DC_CPEN, OnDcCpen)
// ON_COMMAND(ID_DC_GDIBRUSH, OnDcGdibrush)
// ON_COMMAND(ID_DC_GDIFONT, OnDcGdifont)
// ON_COMMAND(ID_DC_GDIPEN, OnDcGdipen)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
// App command to run the dialog
void CMFCDrawApp::OnAppAbout()
{
CAboutDlg aboutDlg;
aboutDlg.DoModal();
}
/////////////////////////////////////////////////////////////////////////////
// CMFCDrawApp message handlers
void CAboutDlg::OnDcCpen()
{
// TODO: Add your command handler code here
}
void CAboutDlg::OnDcGdibrush()
{
// TODO: Add your command handler code here
}
void CAboutDlg::OnDcGdifont()
{
// TODO: Add your command handler code here
}
void CAboutDlg::OnDcGdipen()
{
// TODO: Add your command handler code here
}
// MFCDrawDoc.cpp : implementation of the CMFCDrawDoc class
//
#include "stdafx.h"
#include "MFCDraw.h"
#include "MFCDrawDoc.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CMFCDrawDoc
IMPLEMENT_DYNCREATE(CMFCDrawDoc, CDocument)
BEGIN_MESSAGE_MAP(CMFCDrawDoc, CDocument)
//{{AFX_MSG_MAP(CMFCDrawDoc)
// NOTE - the ClassWizard will add and remove mapping macros here.
// DO NOT EDIT what you see in these blocks of generated code!
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CMFCDrawDoc construction/destruction
CMFCDrawDoc::CMFCDrawDoc()
{
// TODO: add one-time construction code here
}
CMFCDrawDoc::~CMFCDrawDoc()
{
}
BOOL CMFCDrawDoc::OnNewDocument()
{
if (!CDocument::OnNewDocument())
return FALSE;
// TODO: add reinitialization code here
// (SDI documents will reuse this document)
return TRUE;
}
/////////////////////////////////////////////////////////////////////////////
// CMFCDrawDoc serialization
void CMFCDrawDoc::Serialize(CArchive& ar)
{
if (ar.IsStoring())
{
// TODO: add storing code here
}
else
{
// TODO: add loading code here
}
}
/////////////////////////////////////////////////////////////////////////////
// CMFCDrawDoc diagnostics
#ifdef _DEBUG
void CMFCDrawDoc::AssertValid() const
{
CDocument::AssertValid();
}
void CMFCDrawDoc::Dump(CDumpContext& dc) const
{
CDocument::Dump(dc);
}
#endif //_DEBUG
/////////////////////////////////////////////////////////////////////////////
// CMFCDrawDoc commands
// MFCDrawView.cpp : implementation of the CMFCDrawView class
//
#include "stdafx.h"
#include "MFCDraw.h"
#include "MFCDrawDoc.h"
#include "MFCDrawView.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CMFCDrawView
IMPLEMENT_DYNCREATE(CMFCDrawView, CView)
BEGIN_MESSAGE_MAP(CMFCDrawView, CView)
//{{AFX_MSG_MAP(CMFCDrawView)
ON_COMMAND(ID_DC_CPEN, OnDcCpen)
ON_COMMAND(ID_DC_GDIBRUSH, OnDcGdibrush)
ON_COMMAND(ID_DC_GDIFONT, OnDcGdifont)
ON_COMMAND(ID_DC_GDIPEN, OnDcGdipen)
ON_COMMAND(ID_GDI_BMP, OnGdiBmp)
ON_COMMAND(ID_GDI_RGN, OnGdiRgn)
ON_COMMAND(ID_GDI_LINE, OnGdiLine)
ON_COMMAND(ID_GDI_ELLIPSE, OnGdiEllipse)
ON_COMMAND(ID_GDI_RECT, OnGdiRect)
ON_WM_LBUTTONUP()
ON_WM_LBUTTONDOWN()
//}}AFX_MSG_MAP
// Standard printing commands
ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CMFCDrawView construction/destruction
CMFCDrawView::CMFCDrawView()
{
// TODO: add construction code here
// m_ptBegin;
m_nDrawType=0;
}
CMFCDrawView::~CMFCDrawView()
{
}
BOOL CMFCDrawView::PreCreateWindow(CREATESTRUCT& cs)
{
// TODO: Modify the Window class or styles here by modifying
// the CREATESTRUCT cs
return CView::PreCreateWindow(cs);
}
/////////////////////////////////////////////////////////////////////////////
// CMFCDrawView drawing
void CMFCDrawView::OnDraw(CDC* pDC)
{
CMFCDrawDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
// TODO: add draw code for native data here
}
/////////////////////////////////////////////////////////////////////////////
// CMFCDrawView printing
BOOL CMFCDrawView::OnPreparePrinting(CPrintInfo* pInfo)
{
// default preparation
return DoPreparePrinting(pInfo);
}
void CMFCDrawView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
// TODO: add extra initialization before printing
}
void CMFCDrawView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
// TODO: add cleanup after printing
}
/////////////////////////////////////////////////////////////////////////////
// CMFCDrawView diagnostics
#ifdef _DEBUG
void CMFCDrawView::AssertValid() const
{
CView::AssertValid();
}
void CMFCDrawView::Dump(CDumpContext& dc) const
{
CView::Dump(dc);
}
CMFCDrawDoc* CMFCDrawView::GetDocument() // non-debug version is inline
{
ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CMFCDrawDoc)));
return (CMFCDrawDoc*)m_pDocument;
}
#endif //_DEBUG
/////////////////////////////////////////////////////////////////////////////
// CMFCDrawView message handlers
void CMFCDrawView::OnDcCpen()
{
// TODO: Add your command handler code here
CClientDC dc(this);
CPen pen(PS_SOLID,5,RGB(255,0,0));
CPen *pOldPen=dc.SelectObject(&pen);
dc.Rectangle(50,50,150,200);
dc.SelectObject(pOldPen);
pen.DeleteObject();
}
void CMFCDrawView::OnDcGdibrush()
{
// TODO: Add your command handler code here
CClientDC dc(this);
CBitmap bitMap;
bitMap.LoadBitmap(IDB_BITMAP1);
// CBrush brush(HS_BDIAGONAL,RGB(0,255,0));
CBrush brush(&bitMap);
CBrush *pOldBrush=dc.SelectObject(&brush);
RECT rect={100,100,250,200};
dc.FillRect(&rect,&brush);
dc.SelectObject(&pOldBrush);
brush.DeleteObject();
}
void CMFCDrawView::OnDcGdifont()
{
// TODO: Add your command handler code here
CClientDC dc(this);
CFont font;
font.CreatePointFont(500,"黑体");
CFont *pOldFont=dc.SelectObject(&font);
dc.TextOut(100,100,"hello CFont");
dc.SelectObject(pOldFont);
font.DeleteObject();
}
void CMFCDrawView::OnDcGdipen()
{
// TODO: Add your command handler code here
}
void CMFCDrawView::OnGdiBmp()
{
// TODO: Add your command handler code here
CClientDC dc(this);
//无法直接把位图选入dc,位图大小不固定。
CBitmap bmp;
bmp.LoadBitmap(IDB_BITMAP2);
//创建兼容dc
CDC dcBmp;
dcBmp.CreateCompatibleDC(&dc);
//将位图选入兼容dc
CBitmap*pOldBmp=dcBmp.SelectObject(&bmp);
//将位图从兼容dc向当前dc拷贝
/* dc.BitBlt(
0,0,
253,200,
&dcBmp,
0,0,
SRCCOPY
); */
CRect rcClient;
GetClientRect(&rcClient);
dc.StretchBlt(
0,0,
rcClient.Width(),rcClient.Height(),
&dcBmp,
0,0,
253,200,
SRCCOPY
);
dcBmp.SelectObject(pOldBmp);
dcBmp.DeleteDC();
bmp.DeleteObject();
}
void CMFCDrawView::OnGdiRgn()
{
// TODO: Add your command handler code here
CClientDC dc(this);
CBrush brush(RGB(255,0,0));
CBrush* pOldBrush=dc.SelectObject(&brush);
CRgn rgn1,rgn2,rgn3;
rgn1.CreateRectRgn(100,100,300,200);
rgn2.CreateEllipticRgn(150,150,300,250);
rgn2.CombineRgn(&rgn1,&rgn2,RGN_DIFF);
dc.FillRgn(&rgn2,&brush);
dc.SelectObject(pOldBrush);
brush.DeleteObject();
AfxGetMainWnd()->SetWindowRgn(rgn1,TRUE); //制作不规则窗口 按钮
//CWnd::SetWindowRgn
}
void CMFCDrawView::OnGdiLine()
{
// TODO: Add your command handler code here
m_nDrawType=0;
m_ptBegin=0;
m_ptEnd=0;
}
void CMFCDrawView::OnGdiEllipse()
{
// TODO: Add your command handler code here
m_nDrawType=2;
}
void CMFCDrawView::OnGdiRect()
{
// TODO: Add your command handler code here
m_nDrawType=1;
}
void CMFCDrawView::OnLButtonUp(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default
m_ptEnd=point;
CClientDC dc(this);
switch(m_nDrawType){
case 0:{
dc.MoveTo(m_ptBegin.x,m_ptBegin.y);
dc.LineTo(m_ptEnd.x,m_ptEnd.y);
break;
}
case 1:{
dc.Rectangle(m_ptBegin.x,m_ptBegin.y,m_ptEnd.x,
m_ptEnd.y);
break;
}
case 2:{
dc.Ellipse(m_ptBegin.x,m_ptBegin.y,m_ptEnd.x,
m_ptEnd.y);
break;
}
}
CView::OnLButtonUp(nFlags, point);
}
void CMFCDrawView::OnLButtonDown(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default
m_ptBegin=point;
CView::OnLButtonDown(nFlags, point);
}
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