mousedlg.cpp

Visual C++6.0 应用程序开发教程 王兴东（编）第三章 允许用户交互——把鼠标和键盘集成到应用程序中 的源代码

// MouseDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Mouse.h"
#include "MouseDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// 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
	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)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMouseDlg dialog

CMouseDlg::CMouseDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CMouseDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CMouseDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CMouseDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CMouseDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CMouseDlg, CDialog)
	//{{AFX_MSG_MAP(CMouseDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_WM_MOUSEMOVE()
	ON_WM_LBUTTONDOWN()
	ON_WM_KEYDOWN()
	ON_WM_SETCURSOR()
	ON_WM_RBUTTONDOWN()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMouseDlg message handlers

BOOL CMouseDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	

	//My code starts here

	//Innitialsize the cursor to the arrow
	m_bCursor=FALSE;

	//My code ends here

	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CMouseDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CMouseDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CMouseDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CMouseDlg::OnMouseMove(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default

	//My code starts here

	//Check to see if the left mouse button is down
	if((nFlags & MK_LBUTTON)==MK_LBUTTON)
	{
		//Get the Device Context
		CClientDC dc(this);

		//Creat a new pen
		CPen lpen(PS_SOLID,16,RGB(255,0,0));

		//Use the new pen

		dc.SelectObject(&lpen);
		
		//Draw a line from the previous point to the cureent point
		dc.MoveTo(m_iPrevX,m_iPrevY);
		dc.LineTo(point.x,point.y);

		//Save the current point as the previous point
		m_iPrevX=point.x;
		m_iPrevY=point.y;

		//Draw the pixel
		//dc.SetPixel(point .x,point.y,RGB(0,0,0));画点
	}
	if((nFlags & MK_RBUTTON)==MK_RBUTTON)
	{
			//Get the Device Context
		CClientDC dc(this);

		//Creat a new pen
		CPen lpen(PS_SOLID,16,RGB(0,255,0));

		//Use the new pen

		dc.SelectObject(&lpen);
		
		//Draw a line from the previous point to the cureent point
		dc.MoveTo(m_iPrevX,m_iPrevY);
		dc.LineTo(point.x,point.y);

		//Save the current point as the previous point
		m_iPrevX=point.x;
		m_iPrevY=point.y;
	}


	//My code ends here

	CDialog::OnMouseMove(nFlags, point);
}

void CMouseDlg::OnLButtonDown(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	
	//My code starts here

	//Set the current point as the starting point
	m_iPrevX=point.x;
	m_iPrevY=point.y;

	//My code ends here

	CDialog::OnLButtonDown(nFlags, point);
}

void CMouseDlg::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
	// TODO: Add your message handler code here and/or call default

	//My code starts here

	char lsChar;		//The current character being pressed
	HCURSOR lhCursor;		//The handle to the cursor to be displayed

	//Convert the key presses to a character
	lsChar=char(nChar);

	//Is the character "A"	if(lsChar=='A')
	{
		//Load the arrow cursor
		lhCursor=AfxGetApp()->LoadStandardCursor(IDC_ARROW);
		m_bCursor=TRUE;
		//Set the screen cursor
		SetCursor(lhCursor);
	}
	//Is the character "B"
	if(lsChar=='B')
	{
		//Load the I beam cursor
		lhCursor=AfxGetApp()->LoadStandardCursor(IDC_IBEAM);
		m_bCursor=TRUE;
		//Set the screen cursor
		SetCursor(lhCursor);
	}
	//Is the character "C"
	if(lsChar=='C')
	{
		//Load the hourglass cursor
		lhCursor=AfxGetApp()->LoadStandardCursor(IDC_WAIT);
		m_bCursor=TRUE;
		//Set the screen cursor
		SetCursor(lhCursor);
	}

	//Is the character "S"
	if(lsChar=='S')
	{
		lhCursor=AfxGetApp()->LoadStandardCursor(IDC_CROSS);
		m_bCursor=TRUE;
		SetCursor(lhCursor);
	}
	if(lsChar=='D')
	{
		lhCursor=AfxGetApp()->LoadStandardCursor(IDC_UPARROW);
		m_bCursor=TRUE;
		SetCursor(lhCursor);
	}
	if(lsChar=='F')
	{
		lhCursor=AfxGetApp()->LoadStandardCursor(IDC_SIZEALL);
		m_bCursor=TRUE;
		SetCursor(lhCursor);
	}
	if(lsChar=='G')
	{
		lhCursor=AfxGetApp()->LoadStandardCursor(IDC_SIZENWSE);
		m_bCursor=TRUE;
		SetCursor(lhCursor);
	}
	if(lsChar=='H')
	{
		lhCursor=AfxGetApp()->LoadStandardCursor(IDC_SIZENESW);
		m_bCursor=TRUE;
		SetCursor(lhCursor);
	}
	if(lsChar=='J')
	{
		lhCursor=AfxGetApp()->LoadStandardCursor(IDC_SIZEWE);
		m_bCursor=TRUE;
		SetCursor(lhCursor);
	}
	if(lsChar=='K')
	{
		lhCursor=AfxGetApp()->LoadStandardCursor(IDC_SIZENS);
		m_bCursor=TRUE;
		SetCursor(lhCursor);
	}
	if(lsChar=='L')
	{
		lhCursor=AfxGetApp()->LoadStandardCursor(IDC_NO);
		m_bCursor=TRUE;
		SetCursor(lhCursor);
	}
	if(lsChar=='Z')
	{
		lhCursor=AfxGetApp()->LoadStandardCursor(IDC_APPSTARTING);
		m_bCursor=TRUE;
		SetCursor(lhCursor);
	}
	//Is the character "X"
	if(lsChar=='X')
	{
		//Load the arrow cursor
		lhCursor=AfxGetApp()->LoadStandardCursor(IDC_ARROW);
		//Set the cursor flag
		m_bCursor=TRUE;
		//Set the screen cursor
		SetCursor(lhCursor);
		//Exit the application
		OnOK();
	}
	else
	{
		//Set the cursor flag
		m_bCursor=TRUE;
		//Set thr screen cursor
		SetCursor(lhCursor);
	}
	
	//Is shift key is down
	if(::GetKeyState (VK_SHIFT)<0)
		MessageBox("Shift Key is down");
	//My code ends here

	CDialog::OnKeyDown(nChar, nRepCnt, nFlags);
}

BOOL CMouseDlg::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message) 
{
	// TODO: Add your message handler code here and/or call default

	//My code starts here

	//If the cursor has been set ,then return TRUE
	if(m_bCursor)
		return TRUE;
		//My code ends here

	
	return CDialog::OnSetCursor(pWnd, nHitTest, message);
}

void CMouseDlg::OnRButtonDown(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	//My code starts here

	//Set the current point as the starting point
	m_iPrevX=point.x;
	m_iPrevY=point.y;

	//My code ends here
	
	CDialog::OnRButtonDown(nFlags, point);
}