MFC对话框中实现梯形分页（自定义控件）

Dear 丶 2023-06-24 15:25 6阅读 0赞

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

// MFCDlg.cpp: 实现文件
    //
    
    #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_MFC_DIALOG, 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();
    	CRect rect;
    	GetClientRect(rect);
    	rect.top = rect.bottom - 18;
    	m_Memo.Create(5, rect, this, 8088);
    	m_Memo.SetFont(GetFont());
    	m_Memo.InsertItem(0,_T("断点"));
    	m_Memo.InsertItem(1,_T("异常设置"));
    	m_Memo.InsertItem(2,_T("输出"));
    	m_Memo.InsertItem(3,_T("查找"));
    	// 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
    
    	return TRUE;  // 除非将焦点设置到控件，否则返回 TRUE
    }
    
    
    void CMFCDlg::OnPaint()
    { 
    	CPaintDC dc(this);
    
    	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);
    }

//CMemoCtrl.h
    
    #pragma once
    #include <afxwin.h>
    
    class CMemoCtrl :
    	public CWnd
    { 
    	int m_nLeft;
    	int m_nIndex;
    	HCURSOR m_hCursor;
    	CArray<CString> m_aItems;
    	CArray<CRect> m_rc;
    	CFont m_font;
    public:
    	CMemoCtrl();
    	BOOL Create(int nIndex, const RECT& rect, CWnd* pParentWnd, UINT nID);
    	DECLARE_MESSAGE_MAP()
    	afx_msg void OnPaint();
    	afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
    public:
    	void InsertItem(int nIndex,CString szItemName);
    	void SetFont(CFont* pFont);
    	afx_msg void OnMouseMove(UINT nFlags, CPoint point);
    };

//CMemoCtrl.cpp
    
    #include "pch.h"
    #include "CMemoCtrl.h"
    
    CMemoCtrl::CMemoCtrl() 
    { 
    	m_nLeft = 0;
    	m_nIndex = 0;
    	m_hCursor = ::LoadCursor(NULL,IDC_HAND);
    }
    
    BOOL CMemoCtrl::Create(int nCount, const RECT& rect, CWnd* pParentWnd, UINT nID)
    { 
    	return CWnd::Create(NULL, NULL, WS_CHILD|WS_VISIBLE, rect, pParentWnd, nID);
    }
    BEGIN_MESSAGE_MAP(CMemoCtrl, CWnd)
    	ON_WM_PAINT()
    	ON_WM_LBUTTONDOWN()
    	ON_WM_MOUSEMOVE()
    END_MESSAGE_MAP()
    
    
    void CMemoCtrl::OnPaint()
    { 
    	CPaintDC dc(this);
    	CRect rect, rt, rc;
    	GetClientRect(rect);
    	rt = rect;
    	int i = 0;
    	CSize size;
    	CPoint p[5];
    	m_nLeft = 8;
    	m_rc.SetSize(m_aItems.GetSize());
    	CBrush br(GetSysColor(COLOR_3DFACE));
    	dc.FillRect(rect, &br);
    	CFont* pOldFont = dc.SelectObject(&m_font);
    	while (i<m_aItems.GetSize())
    	{ 
    		size = dc.GetTextExtent(m_aItems[i]);
    		rt.left = m_nLeft;
    		p[1].SetPoint(m_nLeft - 8, rt.top);
    		p[2].SetPoint(m_nLeft + 4, rt.bottom);
    		rt.right = m_nLeft+ size.cx + rect.Height();
    		m_rc.SetAt(i, rt);
    		m_nLeft = rt.right;
    		p[3].SetPoint(m_nLeft - 4, rt.bottom);
    		p[4].SetPoint(m_nLeft, rt.bottom -6);
    		p[0].SetPoint(m_nLeft - 8, rt.top);
    
    		//dc.SetBkColor(RGB(255, 255, 255));
    		dc.SetBkMode(TRANSPARENT);
    		
    		if (i == m_aItems.GetSize() - 1)
    		{ 
    			//最后一个设置
    			p[0].SetPoint(rect.right, rt.top);
    			p[4].SetPoint(m_nLeft + 8, rt.top);
    			dc.MoveTo(p[4]);
    			dc.LineTo(p[0]);
    		}
    		if (i != m_nIndex)
    		{ 
    			dc.SelectObject(&m_font);
    			dc.MoveTo(p[0]);
    			dc.Polyline(p, 5);
    			dc.DrawText(m_aItems.GetAt(i), rt, DT_CENTER | DT_VCENTER | DT_SINGLELINE);
    		}
    		else
    		{ 
    			rc = rt;
    		}
    		//TRACE("%d,(%d,%d),(%d,%d),(%d,%d)\n",m_nLeft, p[0].x, p[0].y,p[2].x,p[2].y, p[4].x, p[4].y);
    		i++;
    	}
    	p[0].SetPoint(rc.left -8,rc.top);
    	p[1].SetPoint(rc.left + 4, rc.bottom);
    	p[2].SetPoint(rc.right - 4, rc.bottom);
    	p[3].SetPoint(rc.right + 8, rc.top);
    	CBrush brc(RGB(255, 255, 255));
    	dc.SelectObject(brc);
    	dc.Polygon(p, 4);
    	CPen pen(PS_SOLID,1,RGB(255, 255, 255));
    	dc.SelectObject(pen);
    	p[0].Offset(1, 0);
    	dc.MoveTo(p[0]);
    	dc.LineTo(p[3]);
    	dc.SelectObject(pOldFont);
    	dc.DrawText(m_aItems.GetAt(m_nIndex), rc, DT_CENTER | DT_VCENTER | DT_SINGLELINE);
    }
    
    void CMemoCtrl::OnLButtonDown(UINT nFlags, CPoint point)
    { 
    	for (int i = 0; i < m_rc.GetSize(); i++)
    	{ 
    		if (m_rc.GetAt(i).PtInRect(point))
    		{ 
    			m_nIndex = i;
    			Invalidate();
    		}
    	}
    
    	CWnd::OnLButtonDown(nFlags, point);
    }
    
    void CMemoCtrl::InsertItem(int nIndex, CString szItemName)
    { 
    	m_aItems.InsertAt(nIndex, szItemName);
    }
    
    
    void CMemoCtrl::SetFont(CFont* pFont)
    { 
    	if (!pFont)
    		return;
    	LOGFONT lf;
    	pFont->GetLogFont(&lf);
    	if(m_font.GetSafeHandle())
    		m_font.DeleteObject();
    	m_font.CreateFontIndirect(&lf);
    }
    
    
    void CMemoCtrl::OnMouseMove(UINT nFlags, CPoint point)
    { 
    	for (int i = 0; i < m_rc.GetSize(); i++)
    	{ 
    		if (m_rc.GetAt(i).PtInRect(point))
    		{ 
    			SetCursor(m_hCursor);
    		}
    	}
    
    	CWnd::OnMouseMove(nFlags, point);
    }