MFC对话框中实现走马灯2: 自定义控件(文字信息循环播放显示）

分手后的思念是犯贱 2023-06-23 04:57 4阅读 0赞

## MFC对话框中实现走马灯(文字信息循环播放显示） ##

CLampCtrl.h

#pragma once
    #include <afxwin.h>
    
    
    class CLampCtrl :
    	public CWnd
    { 
    public:
    	CString m_szText;
    	int m_nLeft;
    	COLORREF m_clText, m_clBack;
    	CFont m_font;
    
    	CLampCtrl();
    	BOOL Create(CString szText, const RECT& rect,CWnd* pParentWnd, UINT nID);
    	BOOL CreateEx(DWORD dwExStyle,CString szText, const RECT& rect, CWnd* pParentWnd, UINT nID);
    	void Start(UINT m_nGapTime);
    	void Pause();
    
    public:
    	DECLARE_MESSAGE_MAP()
    	afx_msg void OnTimer(UINT_PTR nIDEvent);
    	afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);
    	afx_msg void OnPaint();
    public:
    	void SetFont(CFont* pFont);
    	void SetBkColor(COLORREF cl);
    	void SetTextColor(COLORREF cl);
    };

CLampCtrl.cpp

#include "pch.h"
    #include "CLampCtrl.h"
    
    CLampCtrl::CLampCtrl() 
    { 
    	m_nLeft = 0;
    	m_clBack = GetSysColor(COLOR_3DFACE);
    	m_clText = GetSysColor(COLOR_WINDOWTEXT);
    };
    
    //BOOL CLampCtrl::Create(LPCTSTR lpszClassName, LPCTSTR lpszWindowName, DWORD dwStyle, const RECT& rect, CWnd* pParentWnd, UINT nID, CCreateContext* pContext)
    BOOL CLampCtrl::Create(CString szText, const RECT& rect, CWnd* pParentWnd, UINT nID)
    { 
    	m_szText = szText;
    	return CWnd::Create(NULL, NULL, WS_CHILD | WS_VISIBLE, rect, pParentWnd, nID);
    }
    
    //BOOL CLampCtrl::CreateEx(DWORD dwExStyle, LPCTSTR lpszClassName, LPCTSTR lpszWindowName, DWORD dwStyle, const RECT& rect, CWnd* pParentWnd, UINT nID, LPVOID lpParam = NULL)
    BOOL CLampCtrl::CreateEx(DWORD dwExStyle,CString szText, const RECT& rect, CWnd* pParentWnd, UINT nID)
    { 
    	m_szText = szText;
    	return CWnd::CreateEx(dwExStyle, NULL, NULL, WS_CHILD | WS_VISIBLE, rect, pParentWnd, nID);
    }
    
    void CLampCtrl::Start(UINT m_nGapTime)
    { 
    	SetTimer(1, m_nGapTime, NULL);
    }
    
    void CLampCtrl::Pause()
    { 
    	KillTimer(1);
    }
    
    BEGIN_MESSAGE_MAP(CLampCtrl, CWnd)
    	ON_WM_TIMER()
    	ON_WM_CREATE()
    	ON_WM_PAINT()
    END_MESSAGE_MAP()
    
    
    void CLampCtrl::OnTimer(UINT_PTR nIDEvent)
    { 
    	CRect rect, rt;
    	GetClientRect(rt);
    	CClientDC dc(this);
    	//dc.SetBkColor(m_clBack);
    	dc.FillSolidRect(rt, m_clBack);
    	dc.SetBkMode(TRANSPARENT);
    	dc.SetTextColor(m_clText);
    	//dc.SelectObject(GetFont());
    	dc.SelectObject(m_font);
    	CSize size = dc.GetOutputTextExtent(m_szText);
    	//dc.TextOut(m_nLeft, rt.Height() - size.cy, m_szText);
    	rect = rt;
    	rect.left = m_nLeft;
    	dc.DrawText(m_szText, rect, DT_VCENTER | DT_SINGLELINE);
    	m_nLeft -= 5;
    	if (m_nLeft + size.cx <= 0)
    		m_nLeft = rt.right;
    
    	CWnd::OnTimer(nIDEvent);
    }
    
    
    int CLampCtrl::OnCreate(LPCREATESTRUCT lpCreateStruct)
    { 
    	if (CWnd::OnCreate(lpCreateStruct) == -1)
    		return -1;
    	CRect rt;
    	GetClientRect(rt);
    	m_nLeft = rt.right;
    	Start(80);
    
    	return 0;
    }
    
    
    void CLampCtrl::OnPaint()
    { 
    	CPaintDC dc(this); // device context for painting
    	CRect rect;
    	GetClientRect(rect);
    	dc.FillSolidRect(rect, RGB(128, 240, 128));
    }
    
    
    void CLampCtrl::SetFont(CFont* pFont)
    { 
    	if (!pFont)
    		return;
    	LOGFONT lf;
    	pFont->GetLogFont(&lf);
    	m_font.CreateFontIndirect(&lf);
    }
    
    
    void CLampCtrl::SetBkColor(COLORREF cl)
    { 
    	m_clBack = cl;
    }
    
    
    void CLampCtrl::SetTextColor(COLORREF cl)
    { 
    	m_clText = cl;
    }

MFCDlg.h

#pragma once
    #include "CLampCtrl.h"
    
    // CMFCDlg 对话框
    class CMFCDlg : public CDialogEx
    { 
    	CLampCtrl m_lamp;
    // 构造
    public:
    	CMFCDlg(CWnd* pParent = nullptr);	// 标准构造函数
    	
    // 对话框数据
    #ifdef AFX_DESIGN_TIME
    	enum {  IDD = IDD_DLG_M };
    #endif
    
    // 实现
    protected:
    	HICON m_hIcon;
    	// 生成的消息映射函数
    	virtual void DoDataExchange(CDataExchange* pDX);	// DDX/DDV 支持
    	virtual BOOL OnInitDialog();
    	afx_msg void OnPaint();
    	afx_msg HCURSOR OnQueryDragIcon();
    	DECLARE_MESSAGE_MAP()
    };

MFCDlg.cpp

#include "pch.h"
    #include "framework.h"
    #include "MFC.h"
    #include "MFCDlg.h"
    #include "afxdialogex.h"
    
    
    #ifdef _DEBUG
    #define new DEBUG_NEW
    #endif
    
    
    // CMFCDlg 对话框
    
    CMFCDlg::CMFCDlg(CWnd* pParent /*=nullptr*/)
    	: CDialogEx(IDD_DLG_M, pParent)
    { 
    
    	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
    }
    
    void CMFCDlg::DoDataExchange(CDataExchange* pDX)
    { 
    	CDialogEx::DoDataExchange(pDX);
    }
    
    BEGIN_MESSAGE_MAP(CMFCDlg, CDialogEx)
    	ON_WM_PAINT()
    	ON_WM_QUERYDRAGICON()
    END_MESSAGE_MAP()
    
    
    // CMFCDlg 消息处理程序
    
    BOOL CMFCDlg::OnInitDialog()
    { 
    	CDialogEx::OnInitDialog();
    
    	// 设置此对话框的图标。 当应用程序主窗口不是对话框时，框架将自动
    	// 执行此操作
    	SetIcon(m_hIcon, TRUE);			// 设置大图标
    	SetIcon(m_hIcon, FALSE);		// 设置小图标
    
    	CRect rect;
    	GetClientRect(rect);
    	rect.top = rect.bottom - 25;
    	//m_lamp.Create(_T("这是一条循环播放的信息 "), rect, this, 8082);
    	m_lamp.CreateEx(WS_EX_CLIENTEDGE, _T("这是一条循环播放的信息 "), rect, this, 8082);
    	m_lamp.SetBkColor(RGB(166, 230, 244));
    	m_lamp.SetTextColor(RGB(255, 10, 100));
    	m_lamp.SetFont(GetFont());
    
    	return TRUE;  // 除非将焦点设置到控件，否则返回 TRUE
    }
    
    // 如果向对话框添加最小化按钮，则需要下面的代码
    // 来绘制该图标。 对于使用文档/视图模型的 MFC 应用程序，
    // 这将由框架自动完成。
    
    void CMFCDlg::OnPaint()
    { 
    	if (IsIconic())
    	{ 
    		CPaintDC dc(this); // 用于绘制的设备上下文
    
    		SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);
    
    		// 使图标在工作区矩形中居中
    		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;
    
    		// 绘制图标
    		dc.DrawIcon(x, y, m_hIcon);
    	}
    	else
    	{ 
    		CDialogEx::OnPaint();
    	}
    }
    
    //当用户拖动最小化窗口时系统调用此函数取得光标
    //显示。
    HCURSOR CMFCDlg::OnQueryDragIcon()
    { 
    	return static_cast<HCURSOR>(m_hIcon);
    }