scrolldlg.cpp

控件的使用源代码。打开后可实现控件的应用 。

// ScrollDlg.cpp : implementation file
//

#include "stdafx.h"
#include "ControlExample.h"
#include "ScrollDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CScrollDlg dialog


CScrollDlg::CScrollDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CScrollDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CScrollDlg)
	m_BValue = 0;
	m_RValue = 0;
	m_GValue = 0;
	//}}AFX_DATA_INIT
}


void CScrollDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CScrollDlg)
	DDX_Control(pDX, IDC_SPINB, m_BSpin);
	DDX_Control(pDX, IDC_SCROLLBARR, m_RScroll);
	DDX_Control(pDX, IDC_SLIDERG, m_GSlider);
	DDX_Text(pDX, IDC_EDITSPIN, m_BValue);
	DDV_MinMaxInt(pDX, m_BValue, 0, 255);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CScrollDlg, CDialog)
	//{{AFX_MSG_MAP(CScrollDlg)
	ON_WM_PAINT()
	ON_WM_VSCROLL()
	ON_WM_HSCROLL()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CScrollDlg message handlers

//初始化成员变量
BOOL CScrollDlg::OnInitDialog() 
{
	CDialog::OnInitDialog();
	
	// TODO: Add extra initialization here
	//初始化颜色
	m_RValue=m_GValue=m_BValue=0;

	m_RScroll.SetScrollRange(0,255,TRUE);
	m_RScroll.SetScrollPos(m_RValue);

	m_GSlider.SetRange(0,255);
	m_GSlider.SetPos(m_GValue);

	m_BSpin.SetRange(0,255);
	UpdateData(FALSE);
	
	return TRUE;  // return TRUE unless you set the focus to a control
	              // EXCEPTION: OCX Property Pages should return FALSE
}

//控件中绘图
void CScrollDlg::OnPaint() 
{
	CPaintDC dc(this); // device context for painting
	
	// TODO: Add your message handler code here
	CWnd* pWnd=GetDlgItem(IDC_DRAW);
	pWnd->UpdateWindow();
	Draw();
	// Do not call CDialog::OnPaint() for painting messages
}

void CScrollDlg::Draw()
{
	CWnd* pWnd=GetDlgItem(IDC_DRAW);
	CDC *pDC=pWnd->GetDC();
	CBrush drawBrush;
	drawBrush.CreateSolidBrush(RGB(m_RValue,m_GValue,m_BValue));
	CBrush *pOldBrush=pDC->SelectObject(&drawBrush);
	CRect rect;
	pWnd->GetClientRect(&rect);
	pDC->Rectangle(rect);
	pDC->SelectObject(pOldBrush);
	
}




void CScrollDlg::OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar) 
{
	// TODO: Add your message handler code here and/or call default
	if(pScrollBar->GetDlgCtrlID()==IDC_SPINB)
	{
		m_BValue=m_BSpin.GetPos();
		Draw();
	}
	
	CDialog::OnVScroll(nSBCode, nPos, pScrollBar);
}

void CScrollDlg::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar) 
{
	// TODO: Add your message handler code here and/or call default
	if(pScrollBar->GetDlgCtrlID()==IDC_SLIDERG)
	{
		m_GValue=m_GSlider.GetPos();
		Draw();
	}
	if(pScrollBar->GetDlgCtrlID()==IDC_SCROLLBARR)
	{
		switch(nSBCode)
		{
		case SB_THUMBPOSITION:
			m_RValue=nPos;
			m_RScroll.SetScrollPos(m_RValue);
			break;
		case SB_LINELEFT:
			break;
		case SB_LINERIGHT:
			break;
		case SB_PAGEUP:
			break;
		case SB_PAGEDOWN:
			break;
		}
		Draw();
	}
	CDialog::OnHScroll(nSBCode, nPos, pScrollBar);
}