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  • MFC按钮CXPButton类,代码阅读起来还是挺不错的

    在操手MFC的时候,经常会抱怨MFC界面不如其他的框架或语言,比如VB,C#等等,面对MS在系统上的不断更新换代,我们也越来越追求软件的视觉效果,譬如我们会更喜欢win7下的玻璃效果,看起来很炫。

    在接触MFC的时候,实在忍不住对MFC的bulider的仰慕之情,因为他把之前的win32 c编程(注意,里面没有面向对象)和C++有机的结合起来了(这时OO跑进来了),让我们更多的专注于软件的功能设计方面,减少了程序繁杂(真心真诚的佩服win32走过来的那些来程序员们)。

    每天都有新的收获,当然不仅仅是软件方面的,因为最近讲师在教我们设计自己的U,其实这个看起来还是蛮有难度的,实际上也很有难度,但是讲师说的没错,了解硬件上的架构只是,或许对于我们软件方面的同学来说,也是不无益处的。

    上主题吧。

    CXPButton类是一个很不错的按钮类,代码阅读起来也很简单,不是非常难,只要是我们对windows编程有所了解的话。难点也不多,主要是对鼠标消息的处理上,比如鼠标到了按钮的上面但是没有按下是什么情形,鼠标按钮按下了又是什么情形,这个都是要体现出来的呀,不然人机交互就苦难了,大众也不会喜欢的。

    另外我觉得在美术的设计上也是挺有难度的,就是很多都知道什么什么样的东西看起来很酷,但是就不知道它怎么去设计,就是所谓的知其然而不起所以然。

     还有在消息的阅读上也有难度,比较生疏的地方就是,WM_MOUSELEAVE和WM_MOUSEHOVER这两个鼠标消息,windows默认是不处理这两个消息的,但是在自定义按钮过程当中又要用到它们。

    所以要触发它们。

    TRACKMOUSEEVENT tme;
    tme.cbSize = sizeof(tme);
    tme.hwndTrack = m_hWnd;
    tme.dwFlags = TME_LEAVE | TME_HOVER;
    tme.dwHoverTime = 1;
    m_bTracking = _TrackMouseEvent(&tme);
    

    上面的代码就是我们所需要的。当鼠标在按钮上停留或者走出按钮区域的话,就(才)会触发两个消息。

    在CXPButton当中只要我们熟练如何运用GDI(再在加上一点点的艺术天分),便可以做出非常酷的按钮。

    下面是源代码:

    #if !defined(AFX_XPBUTTON_H__44CD5B2A_756E_4939_9261_E0034E0F2DEF__INCLUDED_)
    #define AFX_XPBUTTON_H__44CD5B2A_756E_4939_9261_E0034E0F2DEF__INCLUDED_
    
    #if _MSC_VER > 1000
    #pragma once
    #endif // _MSC_VER > 1000
    // XPButton.h : header file
    //
    
    /////////////////////////////////////////////////////////////////////////////
    // CXPButton window
    
    class CXPButton : public CButton
    {
    // Construction
    public:
    	CXPButton();
    
    	// Attributes
    protected:
    	//按钮的外边框
    	CPen m_BoundryPen;
    	
    	//鼠标指针置于按钮之上时按钮的内边框
    	CPen m_InsideBoundryPenLeft;
    	CPen m_InsideBoundryPenRight;
    	CPen m_InsideBoundryPenTop;
    	CPen m_InsideBoundryPenBottom;
    	
    	//按钮获得焦点时按钮的内边框
    	CPen m_InsideBoundryPenLeftSel;
    	CPen m_InsideBoundryPenRightSel;
    	CPen m_InsideBoundryPenTopSel;
    	CPen m_InsideBoundryPenBottomSel;
    	
    	//按钮的底色,包括有效和无效两种状态
    	CBrush m_FillActive;
    	CBrush m_FillInactive;
    	
    	//按钮的状态
    	BOOL m_bOver;	//鼠标位于按钮之上时该值为true,反之为flase
    	BOOL m_bTracking;	//在鼠标按下没有释放时该值为true
    	BOOL m_bSelected;	//按钮被按下是该值为true
    	BOOL m_bFocus;	//按钮为当前焦点所在时该值为true
    
    // Operations
    public:
    
    // Overrides
    	// ClassWizard generated virtual function overrides
    	//{{AFX_VIRTUAL(CXPButton)
    	protected:
    	virtual void PreSubclassWindow();
    	//}}AFX_VIRTUAL
    
    // Implementation
    public:
    	virtual void DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct);
    	virtual void DoGradientFill(CDC *pDC, CRect* rect);
    	virtual void DrawInsideBorder(CDC *pDC, CRect* rect);
    	virtual ~CXPButton();
    
    	// Generated message map functions
    protected:
    	//{{AFX_MSG(CXPButton)
    	afx_msg void OnMouseMove(UINT nFlags, CPoint point);
    	afx_msg LRESULT OnMouseLeave(WPARAM wParam, LPARAM lParam);
    	afx_msg LRESULT OnMouseHover(WPARAM wParam, LPARAM lParam);
    	
    	//}}AFX_MSG
    
    	DECLARE_MESSAGE_MAP()
    };
    
    /////////////////////////////////////////////////////////////////////////////
    
    //{{AFX_INSERT_LOCATION}}
    // Microsoft Visual C++ will insert additional declarations immediately before the previous line.
    
    #endif // !defined(AFX_XPBUTTON_H__44CD5B2A_756E_4939_9261_E0034E0F2DEF__INCLUDED_)
    

      

    // XPButton.cpp : implementation file
    //
    
    #include "stdafx.h"
    #include "XPButton.h"
    #include "resource.h"
    #ifdef _DEBUG
    #define new DEBUG_NEW
    #undef THIS_FILE
    static char THIS_FILE[] = __FILE__;
    #endif
    
    /////////////////////////////////////////////////////////////////////////////
    // CXPButton
    
    CXPButton::CXPButton()
    {
    	m_BoundryPen.CreatePen(PS_INSIDEFRAME | PS_SOLID, 1, RGB(0, 0, 0));
    	m_InsideBoundryPenLeft.CreatePen(PS_INSIDEFRAME | PS_SOLID, 3, RGB(250, 196, 88)); 
    	m_InsideBoundryPenRight.CreatePen(PS_INSIDEFRAME | PS_SOLID, 3, RGB(251, 202, 106));
    	m_InsideBoundryPenTop.CreatePen(PS_INSIDEFRAME | PS_SOLID, 2, RGB(252, 210, 121));
    	m_InsideBoundryPenBottom.CreatePen(PS_INSIDEFRAME | PS_SOLID, 2, RGB(229, 151, 0));
    	
    	m_FillActive.CreateSolidBrush(RGB(223, 222, 236));
    	m_FillInactive.CreateSolidBrush(RGB(222, 223, 236));
    	
    	m_InsideBoundryPenLeftSel.CreatePen(PS_INSIDEFRAME | PS_SOLID, 3, RGB(153, 198, 252)); 
    	m_InsideBoundryPenTopSel.CreatePen(PS_INSIDEFRAME | PS_SOLID, 2, RGB(162, 201, 255));
    	m_InsideBoundryPenRightSel.CreatePen(PS_INSIDEFRAME | PS_SOLID, 3, RGB(162, 189, 252));
    	m_InsideBoundryPenBottomSel.CreatePen(PS_INSIDEFRAME | PS_SOLID, 2, RGB(162, 201, 255));
    	
    	m_bOver = m_bSelected = m_bTracking = m_bFocus = FALSE;
    	
    }
    
    CXPButton::~CXPButton()
    {
    	m_BoundryPen.DeleteObject();
    	m_InsideBoundryPenLeft.DeleteObject();
    	m_InsideBoundryPenRight.DeleteObject();
    	m_InsideBoundryPenTop.DeleteObject();
    	m_InsideBoundryPenBottom.DeleteObject();
    	
    	m_FillActive.DeleteObject();
    	m_FillInactive.DeleteObject();
    	
    	m_InsideBoundryPenLeftSel.DeleteObject();
    	m_InsideBoundryPenTopSel.DeleteObject();
    	m_InsideBoundryPenRightSel.DeleteObject();
    	m_InsideBoundryPenBottomSel.DeleteObject();
    	
    }
    
    
    BEGIN_MESSAGE_MAP(CXPButton, CButton)
    	//{{AFX_MSG_MAP(CXPButton)
    	ON_WM_MOUSEMOVE()
    	ON_MESSAGE(WM_MOUSELEAVE, OnMouseLeave)
    	ON_MESSAGE(WM_MOUSEHOVER, OnMouseHover)
    	//}}AFX_MSG_MAP
    END_MESSAGE_MAP()
    
    /////////////////////////////////////////////////////////////////////////////
    // CXPButton message handlers
    
    //添加Owner Draw属性
    void CXPButton::PreSubclassWindow() 
    {
    	// TODO: Add your specialized code here and/or call the base class
    	
    	CButton::PreSubclassWindow();
    	ModifyStyle(0, BS_OWNERDRAW);
    }
    
    void CXPButton::OnMouseMove(UINT nFlags, CPoint point) 
    {
    	// TODO: Add your message handler code here and/or call default
    	if (!m_bTracking)
    	{
    		TRACKMOUSEEVENT tme;
    		tme.cbSize = sizeof(tme);
    		tme.hwndTrack = m_hWnd;
    		tme.dwFlags = TME_LEAVE | TME_HOVER;
    		tme.dwHoverTime = 1;
    		m_bTracking = _TrackMouseEvent(&tme);
    	}
    	
    	CButton::OnMouseMove(nFlags, point);
    }
    
    
    LRESULT CXPButton::OnMouseLeave(WPARAM wParam, LPARAM lParam)
    {
    	m_bOver = FALSE;
    	m_bTracking = FALSE;
    	InvalidateRect(NULL, FALSE);/**/
    	return 0;
    }
    
    LRESULT CXPButton::OnMouseHover(WPARAM wParam, LPARAM lParam)
    {
    	m_bOver = TRUE;
    	InvalidateRect(NULL);
    	return 0;
    }
    
    
    void CXPButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
    {
    	//从lpDrawItemStruct获取控件的相关信息
    	CRect rect =  lpDrawItemStruct->rcItem;
    	CDC *pDC=CDC::FromHandle(lpDrawItemStruct->hDC);
    	int nSaveDC=pDC->SaveDC();
    	UINT state = lpDrawItemStruct->itemState;
    	POINT pt ;
    	TCHAR strText[MAX_PATH + 1] = L"我爱你";
    	::GetWindowText(m_hWnd, strText, MAX_PATH);/*获取文本原色*/
    	
    	//画按钮的外边框,它是一个半径为5的圆角矩形
    	pt.x = 5;
    	pt.y = 5;
    	CPen* hOldPen = pDC->SelectObject(&m_BoundryPen);
    	pDC->RoundRect(&rect, pt);
    	
    	//获取按钮的状态
    	if (state & ODS_FOCUS)
    	{
    		m_bFocus = TRUE;
    		m_bSelected = TRUE;
    	}
    	else
    	{
    		m_bFocus = FALSE;
    		m_bSelected = FALSE;
    	}
    	
    	
    	if (state & ODS_SELECTED || state & ODS_DEFAULT)
    	{
    		m_bFocus = TRUE;
    	}
    
    	
    	pDC->SelectObject(hOldPen);
    	
    	rect.DeflateRect(CSize(GetSystemMetrics(SM_CXEDGE), GetSystemMetrics(SM_CYEDGE)));
    	
    	//根据按钮的状态填充按钮的底色
    	CBrush* pOldBrush;
    	if (m_bOver)
    	{
    		pOldBrush = pDC->SelectObject(&m_FillActive);
    		DoGradientFill(pDC, &rect);
    	}
    	else
    	{
    		pOldBrush = pDC->SelectObject(&m_FillInactive);
    		DoGradientFill(pDC, &rect);
    	}
    	
    	//根据按钮的状态绘制内边框
    	if (m_bOver || m_bSelected)
    		DrawInsideBorder(pDC, &rect);
    				
    	pDC->SelectObject(pOldBrush);
    	
    	//显示按钮的文本
    	if (strText!=NULL)
    	{
    		CFont* hFont = GetFont();
    		CFont* hOldFont = pDC->SelectObject(hFont);
    		CSize szExtent = pDC->GetTextExtent(strText, lstrlen(strText));
    		CPoint pt( rect.CenterPoint().x - szExtent.cx / 2, rect.CenterPoint().y - szExtent.cy / 2);
    		if (state & ODS_SELECTED) 
    			pt.Offset(1, 1);
    		int nMode = pDC->SetBkMode(TRANSPARENT);
    		if (state & ODS_DISABLED)
    			pDC->DrawState(pt, szExtent, strText, DSS_DISABLED, TRUE, 0, (HBRUSH)NULL);
    		else
    			pDC->DrawState(pt, szExtent, strText, DSS_NORMAL, TRUE, 0, (HBRUSH)NULL);
    		pDC->SelectObject(hOldFont);
    		pDC->SetBkMode(nMode);
    	}
    	
    	
    	pDC->RestoreDC(nSaveDC);
    }
    
    //绘制按钮的底色
    void CXPButton::DoGradientFill(CDC *pDC, CRect* rect)
    {
    	CBrush brBk[64];
    	int nWidth = rect->Width();	
    	int nHeight = rect->Height();
    	CRect rct;
    	
    	/*for (int i = 0; i < 64; i ++)
    	{
    		if (m_bOver)
    		{
    			if (m_bFocus)
    				brBk[i].CreateSolidBrush(RGB(255 - (i / 4), 255 - (i / 4), 255 - (i / 3)));
    			else
    				brBk[i].CreateSolidBrush(RGB(255 - (i / 4), 255 - (i / 4), 255 - (i / 5)));
    		}
    		else
    		{
    			if (m_bFocus)
    				brBk[i].CreateSolidBrush(RGB(255 - (i / 3), 255 - (i / 3), 255 - (i / 4)));
    			else
    				brBk[i].CreateSolidBrush(RGB(255 - (i / 3), 255 - (i / 3), 255 - (i / 5)));
    		}
    	}
    	
    	int i;
    	for (i = rect->top; i <= nHeight + 2; i ++) 
    	{
    		rct.SetRect(rect->left, i, nWidth + 2, i + 1);
    		pDC->FillRect(&rct, &brBk[((i * 63) / nHeight)]);
    	}*/
    	int i;
    	brBk[0].CreateSolidBrush(RGB(255,0,0));
    	brBk[1].CreateSolidBrush(RGB(0,0,0));
    	brBk[2].CreateSolidBrush(RGB(0,0,255));
    	brBk[3].CreateSolidBrush(RGB(0,255,0));
    
    	CBitmap bitmap;
    	BITMAP bmp;
    	bitmap.LoadBitmapW(IDB_QQ);
    	bitmap.GetBitmap(&bmp);
    	CDC MemDC;
    	MemDC.CreateCompatibleDC(pDC);
    
    	if(m_bOver)
    	{
    		CBitmap * OldBitmap = MemDC.SelectObject(&bitmap);
    		pDC->BitBlt(0,0,bmp.bmWidth,bmp.bmHeight,&MemDC,0,0,SRCAND);
    		MemDC.SelectObject(OldBitmap);
    		/*if(m_bFocus)//鼠标+焦点
    			pDC ->FillRect(rect,&brBk[0]);//红
    		else//鼠标+无焦点
    			pDC ->FillRect(rect,&brBk[1]);//黑*/
    	}
    	else
    	{
    		CBitmap * OldBitmap = MemDC.SelectObject(&bitmap);
    		pDC->StretchBlt(0,0,bmp.bmWidth+10,bmp.bmHeight+10,&MemDC,
    			0,0,bmp.bmWidth,bmp.bmHeight,SRCAND);
    		MemDC.SelectObject(OldBitmap);
    		/*if(m_bFocus)//无鼠标+焦点
    			pDC ->FillRect(rect,&brBk[2]);//蓝
    		else
    			pDC ->FillRect(rect,&brBk[3]);//绿*/
    
    	}
    
    	
    	/*for (i = 0; i< 64; i ++)
    		brBk[i].DeleteObject();*/
    }
    
    
    //绘制按钮的内边框
    void CXPButton::DrawInsideBorder(CDC *pDC, CRect* rect)
    {
    	CPen *pLeft, *pRight, *pTop, *pBottom;
    	
    	if (m_bSelected && !m_bOver)
    	{
    		pLeft = & m_InsideBoundryPenLeftSel;
    		pRight = &m_InsideBoundryPenRightSel;
    		pTop = &m_InsideBoundryPenTopSel;
    		pBottom = &m_InsideBoundryPenBottomSel;
    	}
    	else
    	{
    		pLeft = &m_InsideBoundryPenLeft;
    		pRight = &m_InsideBoundryPenRight;
    		pTop = &m_InsideBoundryPenTop;
    		pBottom = &m_InsideBoundryPenBottom;
    	}
    	
    	CPoint oldPoint = pDC->MoveTo(rect->left, rect->bottom - 1);
    	CPen* pOldPen = pDC->SelectObject(pLeft);
    	pDC->LineTo(rect->left, rect->top + 1);
    	pDC->SelectObject(pRight);
    	pDC->MoveTo(rect->right - 1, rect->bottom - 1);
    	pDC->LineTo(rect->right - 1, rect->top);
    	pDC->SelectObject(pTop);
    	pDC->MoveTo(rect->left - 1, rect->top);
    	pDC->LineTo(rect->right - 1, rect->top);
    	pDC->SelectObject(pBottom);
    	pDC->MoveTo(rect->left, rect->bottom);
    	pDC->LineTo(rect->right - 1, rect->bottom);
    	pDC->SelectObject(pOldPen);
    	pDC->MoveTo(oldPoint);
    
    	if (m_bSelected && !m_bOver)
    		DrawFocusRect(pDC->m_hDC,rect);
    }
    

      

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  • 原文地址:https://www.cnblogs.com/daoluanxiaozi/p/2251081.html
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