我用的两个rich edit怎么共享一个滚动条,也就是一个滚动条如何控制两个editor滑动,或者一个滚动条如何在滚动同时让另外一个滚动条也滚动呢?
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WNDPROC DefControlProc;// 新消息处理函数
INT_PTR CALLBACK MyControlProc(HWND hwnd,UINT message, WPARAM wParam, LPARAM lParam)
{
switch(message)
{
case WM_LBUTTONDOWN:
::MessageBox(NULL, "click!", "", MB_OK);
}
//调用控件原来的消息处理函数
return CallWindowProc(DefControlProc, hwnd, message, wParam, lParam);
}// 建立窗口后,更改消息处理函数
case WM_CREATE:
{
// 嵌入新的消息处理函数
DefControlProc = (WNDPROC)SetWindowLongPtr(hControlWnd, GWLP_WNDPROC, (LONG_PTR)MyControlProc);
assert(DefControlProc != NULL);
}
建立一个全局变量,表示两滚动条是否已同步。
当一个RichEdit控件收到滚动消息时,检查是否已同步。
如果已同步,则直接把此消息交给默认消息处理函数处理;
如果未同步,则向另一个RichEdit控件发送滚动消息,并设置已同步,再把此消息交给默认消息处理函数处理。
还有楼上说的同步是通过同步滚动条的位置吗?谢谢啊
HWND g_hEditOutputL; // 输出Edit控件L句柄
HWND g_hEditOutputR; // 输出Edit控件R句柄WNDPROC DefControlProcL;
WNDPROC DefControlProcR;
volatile int bSyned = false;
// 在主窗口建立时
// 嵌入新的消息处理函数
DefControlProcL = (WNDPROC)SetWindowLongPtr(g_hEditOutputL, GWLP_WNDPROC, (LONG_PTR)MyControlProcL);
assert(DefControlProcL != NULL);
DefControlProcR = (WNDPROC)SetWindowLongPtr(g_hEditOutputR, GWLP_WNDPROC, (LONG_PTR)MyControlProcR);
assert(DefControlProcR != NULL);
///////////////////////////////////////////////////////////////////////////////
// 新消息处理函数
INT_PTR CALLBACK MyControlProcL(HWND hwnd,UINT message, WPARAM wParam, LPARAM lParam)
{
switch(message)
{
case WM_VSCROLL:
{
if (!bSyned)
{
PostMessage(g_hEditOutputR, WM_VSCROLL, wParam, lParam);
bSyned = true;
}
else
{
bSyned = false;
}
break;
}
}
//调用控件原来的消息处理函数
return CallWindowProc(DefControlProcL, hwnd, message, wParam, lParam);
}///////////////////////////////////////////////////////////////////////////////
// 新消息处理函数
INT_PTR CALLBACK MyControlProcR(HWND hwnd,UINT message, WPARAM wParam, LPARAM lParam)
{
switch(message)
{
case WM_VSCROLL:
{
if (!bSyned)
{
PostMessage(g_hEditOutputL, WM_VSCROLL, wParam, lParam);
bSyned = true;
}
else
{
bSyned = false;
}
break;
}
}
//调用控件原来的消息处理函数
return CallWindowProc(DefControlProcR, hwnd, message, wParam, lParam);
}
DefControlProcL = (WNDPROC)SetWindowLongPtr(g_hEditOutputL, GWLP_WNDPROC, (LONG_PTR)MyControlProcL);
assert(DefControlProcL != NULL);
DefControlProcR = (WNDPROC)SetWindowLongPtr(g_hEditOutputR, GWLP_WNDPROC, (LONG_PTR)MyControlProcR);
assert(DefControlProcR != NULL);
加到OnInitDialog()吗?
如果你是手动创建RichEdit控件的,就加到手动创建之后,使用控件之前。如果是自动创建的,就加到RichEdit控件所在窗口的初始化消息中。
一般情况下就是加到OnInitDialog()中。
我完整代码是这样的#include "stdafx.h"
#include "test.h"
#include "testDlg.h"
#include <assert.h>#ifdef _DEBUG
#define new DEBUG_NEW
#endifvolatile int bSyned = false;HWND g_hEditOutputL; // 输出Edit控件L句柄
HWND g_hEditOutputR; // 输出Edit控件R句柄WNDPROC DefControlProcL;
WNDPROC DefControlProcR;INT_PTR CALLBACK MyControlProcL(HWND hwnd,UINT message, WPARAM wParam, LPARAM lParam)
{
switch(message)
{
case WM_VSCROLL:
{
if (!bSyned)
{
PostMessage(g_hEditOutputR, WM_VSCROLL, wParam, lParam);
bSyned = true;
}
else
{
bSyned = false;
}
break;
}
}
//调用控件原来的消息处理函数
return CallWindowProc(DefControlProcL, hwnd, message, wParam, lParam);
}///////////////////////////////////////////////////////////////////////////////
// 新消息处理函数
INT_PTR CALLBACK MyControlProcR(HWND hwnd,UINT message, WPARAM wParam, LPARAM lParam)
{
switch(message)
{
case WM_VSCROLL:
{
if (!bSyned)
{
PostMessage(g_hEditOutputL, WM_VSCROLL, wParam, lParam);
bSyned = true;
}
else
{
bSyned = false;
}
break;
}
}
//调用控件原来的消息处理函数
return CallWindowProc(DefControlProcR, hwnd, message, wParam, lParam);
}
// CAboutDlg dialog used for App Aboutclass CAboutDlg : public CDialog
{
public:
CAboutDlg();// Dialog Data
enum { IDD = IDD_ABOUTBOX }; protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support// Implementation
protected:
DECLARE_MESSAGE_MAP()
};CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
}void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
}BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
END_MESSAGE_MAP()
// CtestDlg dialog
CtestDlg::CtestDlg(CWnd* pParent /*=NULL*/)
: CDialog(CtestDlg::IDD, pParent)
{
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}void CtestDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
DDX_Control(pDX, IDC_RICHEDIT21, RichEdit);
//RichEdit.SetEventMask(ENM_SCROLL);
}BEGIN_MESSAGE_MAP(CtestDlg, CDialog)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
// CtestDlg message handlersBOOL CtestDlg::OnInitDialog()
{
//RichEdit.SetEventMask(ENM_SCROLL);
CDialog::OnInitDialog(); DefControlProcL = (WNDPROC)SetWindowLongPtr(g_hEditOutputL, GWLP_WNDPROC, (LONG_PTR)MyControlProcL);
assert(DefControlProcL != NULL);
DefControlProcR = (WNDPROC)SetWindowLongPtr(g_hEditOutputR, GWLP_WNDPROC, (LONG_PTR)MyControlProcR);
assert(DefControlProcR != NULL);
// Add "About..." menu item to system menu. // IDM_ABOUTBOX must be in the system command range.
ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
ASSERT(IDM_ABOUTBOX < 0xF000); CMenu* pSysMenu = GetSystemMenu(FALSE);
if (pSysMenu != NULL)
{
CString strAboutMenu;
strAboutMenu.LoadString(IDS_ABOUTBOX);
if (!strAboutMenu.IsEmpty())
{
pSysMenu->AppendMenu(MF_SEPARATOR);
pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
}
}
// Set the icon for this dialog. The framework does this automatically
// when the application's main window is not a dialog
SetIcon(m_hIcon, TRUE); // Set big icon
SetIcon(m_hIcon, FALSE); // Set small icon
//RichEdit.SetEventMask(ENM_CHANGE|ENM_SCROLL);
// TODO: Add extra initialization here
CString blank=_T("\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n");
CRichEditCtrl *MyRich;
MyRich=(CRichEditCtrl*)GetDlgItem(IDC_RICHEDIT21);
MyRich->ReplaceSel(blank);
MyRich=(CRichEditCtrl*)GetDlgItem(IDC_RICHEDIT22);
MyRich->ReplaceSel(blank); return TRUE; // return TRUE unless you set the focus to a control
}void CtestDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
if ((nID & 0xFFF0) == IDM_ABOUTBOX)
{
CAboutDlg dlgAbout;
dlgAbout.DoModal();
}
else
{
CDialog::OnSysCommand(nID, lParam);
}
}// If you add a minimize button to your dialog, you will need the code below
// to draw the icon. For MFC applications using the document/view model,
// this is automatically done for you by the framework.void CtestDlg::OnPaint()
{
if (IsIconic())
{
CPaintDC dc(this); // device context for painting SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0); // Center icon in client rectangle
int cxIcon = GetSystemMetrics(SM_CXICON);
int cyIcon = GetSystemMetrics(SM_CYICON);
CRect rect;
GetClientRect(&rect);
int x = (rect.Width() - cxIcon + 1) / 2;
int y = (rect.Height() - cyIcon + 1) / 2; // Draw the icon
dc.DrawIcon(x, y, m_hIcon);
}
else
{
CDialog::OnPaint();
}
}// The system calls this function to obtain the cursor to display while the user drags
// the minimized window.
HCURSOR CtestDlg::OnQueryDragIcon()
{
return static_cast<HCURSOR>(m_hIcon);
}
我的工程:RichEdit.zip - 5KB