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VC++实现工具栏上添加平面组合框控件

 2008-11-13 19:31:41 来源:WEB开发网   
核心提示: 但是仅仅产生平面组合框是不够的,必须实现组合框的消息响应函数,VC++实现工具栏上添加平面组合框控件(2),才能方便地运用组合框,在Vsiaul C++中,用户选择组合框中的某一项后,会弹出一个对话框,消息响应函数通常都是用类向导来实现,但是此处由于组合框是用函数创建的

但是仅仅产生平面组合框是不够的,必须实现组合框的消息响应函数,才能方便地运用组合框。在Vsiaul C++中,消息响应函数通常都是用类向导来实现,但是此处由于组合框是用函数创建的,所以必须亲自动手来写代码,也并不麻烦,与类向导生成的代码格式是一样的,可以参照来写。下面代码定义了组合框的选择变化消息响应函数:

///////////////////////////////////////////////////////////////////////////////////////////////
BEGIN_MESSAGE_MAP(CMainFrame, CFrameWnd)
//{{AFX_MSG_MAP(CMainFrame)
 ON_WM_CREATE()
 ON_CBN_SELENDOK(ID_TOOL_ZOOM, OnSelectZoomed)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
//////////////////////////////////////////////////////////////////////////////////////////////
afx_msg void OnSelectZoomed();

二、编程步骤

1、启动Visual C++6.0,生成一个单文档项目,将该项目命名为"ToolBar";

2、通过资源编辑器新增一个工具按钮,"Caption"设置为空,ID资源标志符命名为ID_TOOL_ZOOM;

3、启动Class Wizard从CToolBar派生一个新类CMainToolBar;

4、在MainFrm.h文件中添加#include "MainToolBar.h"语句,然后找到 CToolBar m_wndToolBar语句,用CMainToolBar代替CToolBar;

5、添加代码,编译运行程序。

三、程序代码

////////////////////////////////////////////////////
// FlatComboBox.h : header file
#if !defined(FLATCOMBOBOX_H_INCLUDED)
#define FLATCOMBOBOX_H_INCLUDED
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
#define FC_DRAWNORMAL 0x00000001
#define FC_DRAWRAISED 0x00000002
#define FC_DRAWPRESSD 0x00000004
// CFlatComboBox window
class CFlatComboBox : public CComboBox
{
 // Construction
 public:
  CFlatComboBox();
  // Attributes
 public:
  bool m_bLBtnDown;
  COLORREF m_clrHilite;
  COLORREF m_clrShadow;
  COLORREF m_clrDkShad;
  COLORREF m_clrButton;
  // Operations
 public:
  void DrawCombo(DWORD dwStyle, COLORREF clrTopLeft,
COLORREF clrBottomRight);
  int Offset();
  // Overrides
  // ClassWizard generated virtual function overrides
  //{{AFX_VIRTUAL(CFlatComboBox)
  //}}AFX_VIRTUAL
  // Implementation
 public:
  virtual ~CFlatComboBox();
  // Generated message map functions
 protected:
  //{{AFX_MSG(CFlatComboBox)
   afx_msg void OnMouseMove(UINT nFlags, CPoint point);
   afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
   afx_msg void OnLButtonUp(UINT nFlags, CPoint point);
   afx_msg void OnTimer(UINT nIDEvent);
   afx_msg void OnPaint();
  //}}AFX_MSG
 DECLARE_MESSAGE_MAP()
};
#endif // !defined(FLATCOMBOBOX_H_INCLUDED)
///////////////////////////////////////////
#include "stdafx.h"
#include "FlatComboBox.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
///////////////////////////////// CFlatComboBox
CFlatComboBox::CFlatComboBox()
{
 m_bLBtnDown = false;
}
CFlatComboBox::~CFlatComboBox()
{}
BEGIN_MESSAGE_MAP(CFlatComboBox, CComboBox)
 //{{AFX_MSG_MAP(CFlatComboBox)
  ON_WM_MOUSEMOVE()
  ON_WM_LBUTTONDOWN()
  ON_WM_LBUTTONUP()
  ON_WM_TIMER()
  ON_WM_PAINT()
 //}}AFX_MSG_MAP
END_MESSAGE_MAP()
///////////////////////////////// CFlatComboBox message handlers
void CFlatComboBox::OnMouseMove(UINT nFlags, CPoint point)
{
 SetTimer(1,10,NULL);
 CComboBox::OnMouseMove(nFlags, point);
}
void CFlatComboBox::OnLButtonDown(UINT nFlags, CPoint point)
{
 m_bLBtnDown = true;
 CComboBox::OnLButtonDown(nFlags, point);
}
void CFlatComboBox::OnLButtonUp(UINT nFlags, CPoint point)
{
 m_bLBtnDown = false;
 Invalidate();
 CComboBox::OnLButtonUp(nFlags, point);
}
void CFlatComboBox::OnTimer(UINT nIDEvent)
{
 POINT pt;
 GetCursorPos(&pt);
 CRect rcItem;
 GetWindowRect(&rcItem);
 static bool bPainted = false;
 // OnLButtonDown, show pressed.
 if (m_bLBtnDown==true) {
  KillTimer (1);
  if (bPainted == true) {
   DrawCombo(FC_DRAWPRESSD, ::GetSysColor(COLOR_BTNSHADOW),::GetSysColor(COLOR_BTNHIGHLIGHT));
   bPainted = false;
  }
  return;
 }
// If mouse leaves, show flat.
 if (!rcItem.PtInRect(pt)) {
  KillTimer (1);
  if (bPainted == true) {
   DrawCombo(FC_DRAWNORMAL, ::GetSysColor(COLOR_BTNFACE), ::GetSysColor(COLOR_BTNFACE));
   bPainted = false;
  }
  return;
 }
 // On mouse over, show raised.
 else {
  if (bPainted == true)
   return;
  else {
   bPainted = true;
   DrawCombo(FC_DRAWRAISED, ::GetSysColor(COLOR_BTNSHADOW), ::GetSysColor(COLOR_BTNHIGHLIGHT));
  }
 }
 CComboBox::OnTimer(nIDEvent);
}
void CFlatComboBox::OnPaint()
{
 Default();
 DrawCombo(FC_DRAWNORMAL, ::GetSysColor(COLOR_BTNFACE),::GetSysColor(COLOR_BTNFACE));
}
void CFlatComboBox::DrawCombo(DWORD dwStyle, COLORREF clrTopLeft,
COLORREF clrBottomRight)
{
 CRect rcItem;
 GetClientRect(&rcItem);
 CDC* pDC = GetDC();
 // Cover up dark 3D shadow.
 pDC->Draw3dRect(rcItem, clrTopLeft, clrBottomRight);
 rcItem.DeflateRect(1,1);
 if (!IsWindowEnabled()) {
  pDC->Draw3dRect(rcItem, ::GetSysColor(COLOR_BTNHIGHLIGHT), ::GetSysColor(COLOR_BTNHIGHLIGHT));
 }
 else {
  pDC->Draw3dRect(rcItem, ::GetSysColor(COLOR_BTNFACE),::GetSysColor(COLOR_BTNFACE));
 }
 // Cover up dark 3D shadow on drop arrow.
 rcItem.DeflateRect(1,1);
 rcItem.left = rcItem.right-Offset();
 pDC->Draw3dRect(rcItem, ::GetSysColor(COLOR_BTNFACE),
::GetSysColor(COLOR_BTNFACE));
 // Cover up normal 3D shadow on drop arrow.
 rcItem.DeflateRect(1,1);
 pDC->Draw3dRect(rcItem, ::GetSysColor(COLOR_BTNFACE),
::GetSysColor(COLOR_BTNFACE));
 if (!IsWindowEnabled()) {
  return;
 }
 switch (dwStyle)
 {
  case FC_DRAWNORMAL:
   rcItem.top -= 1;
   rcItem.bottom += 1;
   pDC->Draw3dRect(rcItem, ::GetSysColor(COLOR_BTNHIGHLIGHT),::GetSysColor(COLOR_BTNHIGHLIGHT));
   rcItem.left -= 1;
   pDC->Draw3dRect(rcItem, ::GetSysColor(COLOR_BTNHIGHLIGHT),::GetSysColor(COLOR_BTNHIGHLIGHT));
   break;
  case FC_DRAWRAISED:
   rcItem.top -= 1;
   rcItem.bottom += 1;
   pDC->Draw3dRect(rcItem, ::GetSysColor(COLOR_BTNHIGHLIGHT),::GetSysColor(COLOR_BTNSHADOW));
   break;
  case FC_DRAWPRESSD:
   rcItem.top -= 1;
   rcItem.bottom += 1;
   rcItem.OffsetRect(1,1);
   pDC->Draw3dRect(rcItem, ::GetSysColor(COLOR_BTNSHADOW),::GetSysColor(COLOR_BTNHIGHLIGHT));
   break;
  }
  ReleaseDC(pDC);
 }
 int CFlatComboBox::Offset()
 {
  // Thanks to Todd Brannam for this suggestion...
  return ::GetSystemMetrics(SM_CXHTHUMB);
 }
 /////////////////////////// MainToolBar.h: interface for the CMainToolBar class.
 #if !defined(AFX_MAINTOOLBAR_H__76CF28F4_005F_11D7_8F58_00E04C0BECE6__INCLUDED_)
 #define AFX_MAINTOOLBAR_H__76CF28F4_005F_11D7_8F58_00E04C0BECE6__INCLUDED_
 #if _MSC_VER > 1000
 #pragma once
 #endif // _MSC_VER > 1000
 #include "FlatComboBox.h"
 class CMainToolBar : public CToolBar
 {
  public:
   CMainToolBar();
   virtual ~CMainToolBar();
  public:
   CFlatComboBox m_wndZoom;
 };
 #endif
 ////////////// MainToolBar.cpp: implementation of the CMainToolBar class.
 #include "stdafx.h"
 #include "ToolBar.h"
 #include "MainToolBar.h"
 #ifdef _DEBUG
 #undef THIS_FILE
 static char THIS_FILE[]=__FILE__;
 #define new DEBUG_NEW
 #endif
 CMainToolBar::CMainToolBar()
 {}
 CMainToolBar::~CMainToolBar()
 {}
 ////////////////////////////////////////////////////////////
 int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
 {
  if (CFrameWnd::OnCreate(lpCreateStruct) == -1)
   return -1;
  if (!m_wndToolBar.CreateEx(this, TBSTYLE_FLAT, WS_CHILD | WS_VISIBLE |
   CBRS_TOP| CBRS_GRIPPER | CBRS_TOOLTIPS | CBRS_FLYBY |
   CBRS_SIZE_DYNAMIC) ||!m_wndToolBar.LoadToolBar(IDR_MAINFRAME))
  {
   TRACE0("Failed to create toolbarn");
   return -1; // fail to create
  }
  if (!m_wndStatusBar.Create(this) || !m_wndStatusBar.SetIndicators(indicators,
sizeof(indicators)/sizeof(UINT)))
  {
   TRACE0("Failed to create status barn");
   return -1; // fail to create
  }
  // TODO: Delete these three lines if you don't want the toolbar to be dockable
  m_wndToolBar.EnableDocking(CBRS_ALIGN_ANY);
  EnableDocking(CBRS_ALIGN_ANY);
  DockControlBar(&m_wndToolBar);
  int index = 0;
  RECT rect;
  //找到指定的工具项
  while(m_wndToolBar.GetItemID(index)!=ID_TOOL_ZOOM)
   index++;
   //设置指定工具项的宽度并获取新的区域 80是宽度
   m_wndToolBar.SetButtonInfo(index, ID_TOOL_ZOOM, TBBS_SEPARATOR, 80);
   m_wndToolBar.GetItemRect(index, &rect);
   //设置位置
   rect.top+=2;
   rect.bottom += 200;
   // 创建并显示
   if (!m_wndToolBar.m_wndZoom.Create(WS_CHILD|WS_VISIBLE |
CBS_AUTOHSCROLL|CBS_DROPDOWNLIST |
CBS_HASSTRINGS ,rect, &m_wndToolBar, ID_TOOL_ZOOM))
   {
    TRACE0("Failed to create combo-boxn");
    return FALSE;
   }
   m_wndToolBar.m_wndZoom.ShowWindow(SW_SHOW);
   //填充内容
   m_wndToolBar.m_wndZoom.AddString("25%");
   m_wndToolBar.m_wndZoom.AddString("50%");
   m_wndToolBar.m_wndZoom.AddString("75%");
   m_wndToolBar.m_wndZoom.AddString("100%");
   m_wndToolBar.m_wndZoom.AddString("125%");
   m_wndToolBar.m_wndZoom.AddString("150%");
   m_wndToolBar.m_wndZoom.AddString("175%");
   m_wndToolBar.m_wndZoom.AddString("200%");
   m_wndToolBar.m_wndZoom.SetCurSel(3);
   return 0;
  }
  void CMainFrame::OnSelectZoomed()
  {
   CString strContent;
   m_wndToolBar.m_wndZoom.GetWindowText(strContent);
   AfxMessageBox(strContent);
  }

四、小结

为了实现OFFICE2000风格的工具条,本实例介了一种比较巧妙的方法,利用Visual C++6.0已有的开发环境支持,在工具条中加入了平面组合框控件,并实现了组合框的消息响应,用户选择组合框中的某一项后,会弹出一个对话框,提示用户所选择的信息。

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Tags:VC 实现 工具栏

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