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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