littlebrushdlg.cpp

从学案例入手

// LittleBrushDlg.cpp : implementation file
//

#include "stdafx.h"
#include "LittleBrush.h"
#include "LittleBrushDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CLittleBrushDlg dialog

CLittleBrushDlg::CLittleBrushDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CLittleBrushDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CLittleBrushDlg)
		// 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 CLittleBrushDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CLittleBrushDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CLittleBrushDlg, CDialog)
	//{{AFX_MSG_MAP(CLittleBrushDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CLittleBrushDlg message handlers

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

void CLittleBrushDlg::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 CLittleBrushDlg::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
	{
		// 获得窗口的客户区设备上下文句柄
		CPaintDC dc(this);
		// 更改设备上下文所使用的当前字体，使之更适合于文本输出
		LOGFONT lf;
		dc.GetCurrentFont()->GetLogFont(&lf);
		lf.lfHeight=-12;
		lf.lfWidth=0;
		strcpy(lf.lfFaceName, "宋体");
		CFont font, *pOldFont;
		font.CreateFontIndirect(&lf);
		pOldFont=dc.SelectObject(&font);
		// 创建一个单色刷子
		{
			CBrush br, *pOldBrush;
			br.CreateSolidBrush(RGB(128, 0, 128));
			pOldBrush=dc.SelectObject(&br);
			dc.Rectangle(10, 10, 160, 110);
			dc.SelectObject(pOldBrush);
			br.DeleteObject();
			dc.TextOut(10, 115, "原色刷子");
		}
		// 创建一个具有样式 HS_BDIAGONAL 的刷子
		{
			CBrush br, *pOldBrush;
			br.CreateHatchBrush(HS_BDIAGONAL, RGB(128, 0, 128));
			pOldBrush=dc.SelectObject(&br);
			dc.Rectangle(180, 10, 330, 110);
			dc.SelectObject(pOldBrush);
			br.DeleteObject();
			dc.TextOut(180, 115, "HS_BDIAGONAL");
		}
		// 创建一个具有样式 HS_CROSS 的刷子
		{
			CBrush br, *pOldBrush;
			br.CreateHatchBrush(HS_CROSS, RGB(128, 0, 128));
			pOldBrush=dc.SelectObject(&br);
			dc.Rectangle(350, 10, 500, 110);
			dc.SelectObject(pOldBrush);
			br.DeleteObject();
			dc.TextOut(350, 115, "HS_CROSS");
		}
		// 创建一个具有样式 HS_DIAGCROSS 的刷子
		{
			CBrush br, *pOldBrush;
			br.CreateHatchBrush(HS_DIAGCROSS, RGB(128, 0, 128));
			pOldBrush=dc.SelectObject(&br);
			dc.Rectangle(520, 10, 670, 110);
			dc.SelectObject(pOldBrush);
			br.DeleteObject();
			dc.TextOut(520, 115, "HS_DIAGCROSS");
		}
		// 创建一个具有样式 HS_FDIAGONAL 的刷子
		{
			CBrush br, *pOldBrush;
			br.CreateHatchBrush(HS_FDIAGONAL, RGB(128, 0, 128));
			pOldBrush=dc.SelectObject(&br);
			dc.Rectangle(10, 140, 160, 240);
			dc.SelectObject(pOldBrush);
			br.DeleteObject();
			dc.TextOut(10, 245, "HS_FDIAGONAL");
		}
		// 创建一个具有样式 HS_VERTICAL 的刷子
		{
			CBrush br, *pOldBrush;
			br.CreateHatchBrush(HS_VERTICAL, RGB(128, 0, 128));
			pOldBrush=dc.SelectObject(&br);
			dc.Rectangle(180, 140, 330, 240);
			dc.SelectObject(pOldBrush);
			br.DeleteObject();
			dc.TextOut(180, 245, "HS_VERTICAL");
		}
		// 创建一个使用位图图案的刷子
		{
			CBitmap bitmap;
			bitmap.LoadBitmap(IDB_BRUSH1);
			CBrush br, *pOldBrush;
			br.CreatePatternBrush(&bitmap);
			pOldBrush=dc.SelectObject(&br);
			dc.Rectangle(350, 140, 500, 240);
			dc.SelectObject(pOldBrush);
			br.DeleteObject();
			dc.TextOut(350, 245, "使用位图图案创建的刷子之一");
		}
		{
			CBitmap bitmap;
			bitmap.LoadBitmap(IDB_BRUSH2);
			CBrush br, *pOldBrush;
			br.CreatePatternBrush(&bitmap);
			pOldBrush=dc.SelectObject(&br);
			dc.Rectangle(520, 140, 670, 240);
			dc.SelectObject(pOldBrush);
			br.DeleteObject();
			dc.TextOut(520, 245, "使用位图图案创建的刷子之二");
		}
		// 恢复设备上下文原有的 GDI 绘图对象
		dc.SelectObject(pOldFont);

		CDialog::OnPaint();
	}
}

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