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VC++实现工具栏上添加平面组合框控件(2)


http://www.sina.com.cn 2005年08月04日 09:22 天极yesky

  文/刘涛

//////////////////////////////////////////////////////////////////////////////
// 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 toolbar\n");
  return -1; // fail to create
 }
 if (!m_wndStatusBar.Create(this) || !m_wndStatusBar.SetIndicators(indicators,
sizeof(indicators)/sizeof(UINT)))
 {
  TRACE0("Failed to create status bar\n");
  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-box\n");
  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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