www.pudn.com > 8_01.rar > treeDlg.cpp

// treeDlg.cpp : implementation file 
// 
 
#include "stdafx.h" 
#include "tree.h" 
#include "treeDlg.h" 
#include  
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
//定义PI 
const double PI=3.11415926/180; 
 
///////////////////////////////////////////////////////////////////////////// 
// CTreeDlg dialog 
 
CTreeDlg::CTreeDlg(CWnd* pParent /*=NULL*/) 
	: CDialog(CTreeDlg::IDD, pParent) 
{ 
	//{{AFX_DATA_INIT(CTreeDlg) 
		// 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); 
 
	/************************************************************************/ 
	m_bRunning = FALSE; 
	m_Interval = 10; 
	m_bgColor = RGB(0, 0, 0); 
	m_fgColor = RGB(0, 255, 0); 
	m_C = 9; 
	m_dir = TRUE; 
	/************************************************************************/	 
} 
 
void CTreeDlg::DoDataExchange(CDataExchange* pDX) 
{ 
	CDialog::DoDataExchange(pDX); 
	//{{AFX_DATA_MAP(CTreeDlg) 
		// NOTE: the ClassWizard will add DDX and DDV calls here 
	//}}AFX_DATA_MAP 
} 
 
BEGIN_MESSAGE_MAP(CTreeDlg, CDialog) 
	//{{AFX_MSG_MAP(CTreeDlg) 
	ON_WM_PAINT() 
	ON_WM_QUERYDRAGICON() 
	ON_WM_LBUTTONDOWN() 
	ON_WM_TIMER() 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
///////////////////////////////////////////////////////////////////////////// 
// CTreeDlg message handlers 
 
BOOL CTreeDlg::OnInitDialog() 
{ 
	CDialog::OnInitDialog(); 
 
	// 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 
	 
	/************************************************************************/ 
	//获取窗口大小 
	GetClientRect(&m_Rect); 
	//得到物理画布 
	m_DC.Attach(::GetDC(*this)); 
	//创建内存画布 
	m_MemDC.CreateCompatibleDC(&m_DC); 
	m_Bitmap.CreateCompatibleBitmap(&m_DC, m_Rect.Width(), m_Rect.Height()); 
	m_MemDC.SelectObject(&m_Bitmap); 
	//设置画笔颜色 
	m_Pen.CreatePen(PS_SOLID, 1, m_fgColor); 
	m_MemDC.SelectObject(&m_Pen); 
	//填充背景颜色 
	m_MemDC.FillSolidRect(&m_Rect, m_bgColor); 
	/************************************************************************/ 
 
	return TRUE;   
} 
 
// 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 CTreeDlg::OnPaint()  
{ 
	AfxGetMainWnd()->SetWindowText("摇曳的分形树（分形频道：fractal.cn）2004    请单击窗体"); 
	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 
	{ 
		m_DC.BitBlt(0, 0, m_Rect.Width(), m_Rect.Height(),  
			&m_MemDC, 0, 0, SRCCOPY); 
 
		CDialog::OnPaint(); 
	} 
} 
 
// The system calls this to obtain the cursor to display while the user drags 
//  the minimized window. 
HCURSOR CTreeDlg::OnQueryDragIcon() 
{ 
	return (HCURSOR) m_hIcon; 
} 
 
//单击暂停/恢复 
void CTreeDlg::OnLButtonDown(UINT nFlags, CPoint point)  
{ 
	if (m_bRunning) { 
		KillTimer(10); 
		m_bRunning = FALSE; 
	} else { 
		SetTimer(10, m_Interval, NULL); 
		m_bRunning = TRUE; 
	} 
	 
	CDialog::OnLButtonDown(nFlags, point); 
} 
 
//定时器处理函数，在这个函数里绘制树 
void CTreeDlg::OnTimer(UINT nIDEvent)  
{ 
	int x, y; 
 
	x = m_Rect.Width()/2; 
	y = m_Rect.Height()-50; 
 
	//在内存画布中清屏 
	m_MemDC.FillSolidRect(&m_Rect, m_bgColor); 
 
	//在内存画布中绘制树 
	drawLeaf(x, y, m_Rect.Height()/5, 270, 50, m_C); 
 
	if (m_dir) { 
		m_C += 0.5; 
		if (m_C > 18) 
			m_dir = FALSE; 
	} else { 
		m_C -= 0.5; 
		if (m_C < -18) 
			m_dir = TRUE; 
	} 
 
	//把树拷贝到物理画布中 
	m_DC.BitBlt(0, 0, m_Rect.Width(), m_Rect.Height(), 
		&m_MemDC, 0, 0, SRCCOPY); 
 
	CDialog::OnTimer(nIDEvent); 
} 
 
void CTreeDlg::drawLeaf(double x, double y, double L, double A, float B, float C) 
{ 
	double s1, s2, s3; 
	s1 = 2; 
	s2 = 3; 
	s3 = 1.3; 
	int x1,y1,x1L,y1L,x1R,y1R,x2,y2,x2R,y2R,x2L,y2L; 
	if(L > s1) 
	{ 
		x2 = (int)(x + L * cos(A * PI)); 
		y2 = (int)(y + L * sin(A * PI)); 
		x2R = (int)(x2 + L / s2 * cos((A + B) * PI)); 
		y2R = (int)(y2 + L / s2 * sin((A + B) * PI)); 
		x2L = (int)(x2 + L / s2 * cos((A - B) * PI)); 
		y2L = (int)(y2 + L / s2 * sin((A - B) * PI)); 
		 
		x1 = (int)(x + L / s2 * cos(A * PI)); 
		y1 = (int)(y + L / s2 * sin(A * PI)); 
		x1L = (int)(x1 + L / s2 * cos((A - B) * PI)); 
		y1L = (int)(y1 + L / s2 * sin((A - B) * PI)); 
		x1R = (int)(x1 + L / s2 * cos((A + B) * PI)); 
		y1R = (int)(y1 + L / s2 * sin((A + B) * PI)); 
		 
		 
		m_MemDC.MoveTo((int)x,(int)y); 
		m_MemDC.LineTo(x2,y2); 
		m_MemDC.LineTo(x2R,y2R); 
		m_MemDC.MoveTo(x2,y2); 
		m_MemDC.LineTo(x2L,y2L); 
		m_MemDC.MoveTo(x1,y1); 
		m_MemDC.LineTo(x1L,y1L); 
		m_MemDC.MoveTo(x1,y1); 
		m_MemDC.LineTo(x1R,y1R); 
		 
		drawLeaf(x2, y2, L / s3, A + C, B, C); 
		drawLeaf(x2R, y2R, L / s2, A + B, B, C); 
		drawLeaf(x2L, y2L, L / s2, A - B, B, C); 
		drawLeaf(x1L, y1L, L / s2, A - B, B, C); 
		drawLeaf(x1R, y1R, L / s2, A + B, B, C); 
	}   
}