VC 轻松实现非客户区按钮

源代码下载

一、简介

有时我们需要在非客户区（例如：标题栏）添加按钮，并对按钮作出响应，如下图所示：



为此我封装了两个类CNCButton和CNCButtonManager，CNCButton主要用于按钮绘制，CNCButtonManager用于按钮的管理并对非客户区的消息进行处理。如下是几个主要的非客户区消息：
WM_NCHITTEST
WM_NCACTIVATE
WM_NCPAINT

二、使用

2.1 首先我们需要引用两个类的头文件

#include"NCButtonManager.h"

#include "NCButton.h"

2.2 为按钮定义ID

#define ID_BUTTON1 100

#define ID_BUTTON2 101

#define ID_BUTTON3 102

2.3 添加按钮和管理类成员变量

// Implementation

public:

CNCButtonm_NcButton1;

CNCButtonm_NcButton2;

CNCButtonm_NcButton3;

CNCButtonManagerm_NcButtonManager;

2.4 创建按钮

// 按钮的位置和尺寸

POINT ptBtn1Offset = {120, 10};

POINT ptBtn2Offset = {20, 32};

POINT ptBtn3Offset = {190, 10};

SIZE sizeBtn1 = {60, 14};

SIZE sizeBtn2 = {16, 14};

SIZE sizeBtn3 = {16, 14};

// 创建按钮

m_NcButton1.Create("",this->m_hWnd, ptBtn1Offset, sizeBtn1, ID_BUTTON1);

m_NcButton2.Create("", this->m_hWnd,ptBtn2Offset, sizeBtn2, ID_BUTTON2);

m_NcButton3.Create("",this->m_hWnd, ptBtn3Offset, sizeBtn3, ID_BUTTON3);

// 设置文字、提示、按钮位图

m_NcButton1.SetText("VC知识库", "宋体", 12);

m_NcButton1.SetTooltip("VC知识库欢迎您!");

m_NcButton2.SetButtonBitmap(IDB_PEN1,BTNBMP_NORMAL); // 正常位图

m_NcButton2.SetButtonBitmap(IDB_PEN2,BTNBMP_MOUSEOVER); // 鼠标移到上面时的位图

m_NcButton2.SetTooltip("pen");

m_NcButton3.SetButtonBitmap(IDB_PEN1,BTNBMP_NORMAL);

m_NcButton3.SetButtonBitmap(IDB_PEN2,BTNBMP_MOUSEOVER);

m_NcButton3.SetTooltip("pen");

// 添加到管理类

m_NcButtonManager.AddButton(&m_NcButton1);

m_NcButtonManager.AddButton(&m_NcButton2);

m_NcButtonManager.AddButton(&m_NcButton3);

2.5 消息的处理

2.5.1 将消息转发给管理类

LRESULTCMainFrame::DefWindowProc(UINT message, WPARAM wParam, LPARAM lParam)

{

LRESULTlResult = CFrameWnd::DefWindowProc(message, wParam, lParam);

if(!IsWindow(this->m_hWnd))

returnlResult;

LRESULTlMyResult = m_NcButtonManager.DefWindowProc(this->m_hWnd, message, wParam,lParam);

if(lMyResult!= 0)

returnlMyResult;

else

returnlResult;

}

2.5.2 添加消息处理函数

// Operations

public:

voidOnNcButton1Clicked();

voidCMainFrame::OnNcButton1Clicked()

{

AfxMessageBox("VC知识库欢迎您! www.vckbase.com");

}

2.5.3 消息映射

BEGIN_MESSAGE_MAP(CMainFrame,CFrameWnd)

//{{AFX_MSG_MAP(CMainFrame)

ON_BN_CLICKED(ID_BUTTON1,OnNcButton1Clicked)

ON_BN_CLICKED(ID_BUTTON2,OnNcButton2Clicked)

ON_BN_CLICKED(ID_BUTTON3,OnNcButton3Clicked)

ON_WM_CREATE()

//}}AFX_MSG_MAP

END_MESSAGE_MAP()

总结：本文提供的两个类可以方便地往非客户区（如：标题栏）添加按钮，欢迎批评指正！