滑动条dlg.cpp

Visual C++_ 600 编程学习捷径

// 滑动条Dlg.cpp : implementation file
//

#include "stdafx.h"
#include "滑动条.h"
#include "滑动条Dlg.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()

/////////////////////////////////////////////////////////////////////////////
// CMyDlg dialog

CMyDlg::CMyDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CMyDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CMyDlg)
	m_red = 0;
	m_green = 0;
	m_blue = 0;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CMyDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CMyDlg)
	DDX_Control(pDX, IDC_SPIN1, m_spin);
	DDX_Control(pDX, IDC_SLIDER1, m_slider);
	DDX_Control(pDX, IDC_SCROLLBAR2, m_scroll);
	DDX_Text(pDX, IDC_EDIT3, m_red);
	DDV_MinMaxInt(pDX, m_red, 0, 255);
	DDX_Text(pDX, IDC_EDIT1, m_green);
	DDV_MinMaxInt(pDX, m_green, 0, 255);
	DDX_Text(pDX, IDC_EDIT2, m_blue);
	DDV_MinMaxInt(pDX, m_blue, 0, 255);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CMyDlg, CDialog)
	//{{AFX_MSG_MAP(CMyDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_EN_CHANGE(IDC_EDIT1, OnChangeEdit)
	ON_NOTIFY(NM_CUSTOMDRAW, IDC_SLIDER1, OnCustomdrawSlider1)
	ON_WM_HSCROLL()
	ON_EN_CHANGE(IDC_EDIT2, OnChangeEdit)
	ON_EN_CHANGE(IDC_EDIT3, OnChangeEdit)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMyDlg message handlers

BOOL CMyDlg::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
	m_scroll.SetScrollRange(0,255,true);
	m_slider.SetRange(0,255);
	m_spin.SetRange(0,255);

	m_scroll.SetScrollPos(m_red);
	m_slider.SetPos(m_blue);
	m_spin.SetPos(m_green);
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CMyDlg::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 CMyDlg::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 CMyDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CMyDlg::OnChangeEdit() 
{
	// TODO: If this is a RICHEDIT control, the control will not
	// send this notification unless you override the CDialog::OnInitDialog()
	// function and call CRichEditCtrl().SetEventMask()
	// with the ENM_CHANGE flag ORed into the mask.
	
	// TODO: Add your control notification handler code here
	CWnd* pWnd = GetDlgItem(IDC_STATIC);

	if(pWnd)
	{
		this->UpdateData();
		DrawBrush();
	}
}



void CMyDlg::OnCustomdrawSlider1(NMHDR* pNMHDR, LRESULT* pResult) 
{
	// TODO: Add your control notification handler code here
	m_blue = m_slider.GetPos();
		this->UpdateData(false);
		DrawBrush();
	*pResult = 0;
}


void CMyDlg::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar) 

{
	// TODO: Add your message handler code here and/or call default

	int nScrollMin,nScrollMax,nScrollPos;

	int nPageSize;



	if(&m_scroll!=pScrollBar)
		return;

	nScrollPos=m_scroll.GetScrollPos();

	m_scroll.GetScrollRange(&nScrollMin,&nScrollMax);

	nPageSize=(nScrollMax-nScrollMin)/5; //指定页长

	switch(nSBCode)

	{

    	case SB_LEFT:
			nScrollPos=nScrollMin;
			break;
		case SB_RIGHT:
			nScrollPos=nScrollMax;
			break;

		case SB_LINELEFT:
			nScrollPos-=1;

			break;

		case SB_LINERIGHT:

			nScrollPos+=1;

			break;

		case SB_PAGELEFT:

			nScrollPos-=nPageSize;

			break;

		case SB_PAGERIGHT:

			nScrollPos+=nPageSize;

			break;

		case SB_THUMBPOSITION:

			nScrollPos=nPos; //由参数nPos获取滚动框的位置

			break;

		case SB_THUMBTRACK:

			nScrollPos=nPos; //由参数nPos获取滚动框的位置

			break;

			default:;

	}

	if(nScrollPos<nScrollMin)nScrollPos=nScrollMin;

	if(nScrollPos>nScrollMax)nScrollPos=nScrollMax;

	if(nScrollPos!=m_scroll.GetScrollPos())

	m_scroll.SetScrollPos(nScrollPos); //设置滚动框的新位置


	m_red = m_scroll.GetScrollPos();
	this->UpdateData(false);
	DrawBrush();
	CDialog::OnHScroll(nSBCode, nPos, pScrollBar);
}

void CMyDlg::DrawBrush()
{
	CWnd* pWnd = GetDlgItem(IDC_STATIC);
	CDC* pDC = pWnd->GetDC();
	CBrush drawbrush;
	drawbrush.CreateSolidBrush(RGB(m_red,m_green,m_blue));
	CBrush* pOldBrush = pDC->SelectObject(&drawbrush); 
	CRect rect;
	pWnd->GetClientRect(&rect);
	pDC->Rectangle(&rect);
	pDC->SelectObject(&pOldBrush);
	

}