如何在 MFC 中调整对话框大小时移动控件? [英] How to move a control while resizing dialog size in MFC?

问题描述

我已经在 MFC 中查看了对话框.

从下图可以看得很清楚.(如滑块控件和编辑框等)

当我调整对话框大小时，这些控件不会移动.

当我稍微调整对话框大小时，我得到了这个

如您所见，滑块消失了.

我在这里更新了 MyDlg.cpp

//mfc_test5Dlg.cpp : 实现文件//#include stdafx.h"#include mfc_test5.h"#include mfc_test5Dlg.h"#include afxdialogex.h"#include "Testview.h"#include <Magick++.h>外部 CTestview *global_TestView;字符 * 文件位置；#ifdef _DEBUG#define new DEBUG_NEW#万一//用于 App About 的 CAboutDlg 对话框类 CAboutDlg : 公共 CDialogEx{上市:CAboutDlg();//对话数据枚举 { IDD = IDD_ABOUTBOX };受保护:虚拟无效 DoDataExchange(CDataExchange* pDX);//DDX/DDV 支持//执行受保护:DECLARE_MESSAGE_MAP()};CAboutDlg::CAboutDlg() : CDialogEx(CAboutDlg::IDD){}无效 CAboutDlg::DoDataExchange(CDataExchange* pDX){CDialogEx::DoDataExchange(pDX);}BEGIN_MESSAGE_MAP(CAboutDlg, CDialogEx)END_MESSAGE_MAP()//Cmfc_test5Dlg 对话框Cmfc_test5Dlg::Cmfc_test5Dlg(CWnd* pParent/*=NULL*/): CDialogEx(Cmfc_test5Dlg::IDD, pParent), m_CString(_T("")){m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);文件位置 = (char*)this;m_pTestView = NULL；}无效 Cmfc_test5Dlg::DoDataExchange(CDataExchange* pDX){CDialogEx::DoDataExchange(pDX);DDX_Control(pDX, IDC_SLIDER1, m_CSliderCtrl);DDX_Text(pDX, IDC_EDIT1, m_CString);}BEGIN_MESSAGE_MAP(Cmfc_test5Dlg, CDialogEx)ON_WM_SYSCOMMAND()ON_WM_PAINT()ON_WM_QUERYDRAGICON()ON_NOTIFY(NM_RELEASEDCAPTURE, IDC_SLIDER1, &Cmfc_test5Dlg::OnNMReleasedcaptureSlider1)ON_WM_DROPFILES()ON_WM_CREATE()ON_WM_SIZE()END_MESSAGE_MAP()BOOL Cmfc_test5Dlg::OnInitDialog(){CDialogEx::OnInitDialog();GetClientRect(&m_SaveRect);//将关于..."菜单项添加到系统菜单.CRuntimeClass *pObject;pObject = RUNTIME_CLASS(CTestview);m_pTestView = (CTestview*)pObject->CreateObject();CRect crt;GetClientRect(&crt);整数 x,y;x = crt.Width();y = crt.Height();//http://stackoverflow.com/questions/33653087/how-to-move-a-control-while-resizing-dialog-size-in-mfc//m_CSliderCtrl.SetWindowPos(0,x-293,y-125,x-293,y-125,SWP_NOSIZE/*SWP_NOZORDER*/);if (!m_pTestView->Create(NULL, NULL, AFX_WS_DEFAULT_VIEW, CRect(0, 0,x-200 ,y), this, AFX_IDW_PANE_FIRST, NULL)){TRACE0("创建视图窗口失败
");返回-1；}//IDM_ABOUTBOX 必须在系统命令范围内.断言((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);断言(IDM_ABOUTBOX <0xF000)；CMenu* pSysMenu = GetSystemMenu(FALSE);如果(pSysMenu！= NULL){BOOL bNameValid;CString strAboutMenu;bNameValid = strAboutMenu.LoadString(IDS_ABOUTBOX);断言(bNameValid)；if (!strAboutMenu.IsEmpty()){pSysMenu->AppendMenu(MF_SEPARATOR);pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);}}//设置此对话框的图标.该框架会自动执行此操作//当应用程序的主窗口不是对话框时SetIcon(m_hIcon, TRUE);//设置大图标SetIcon(m_hIcon, FALSE);//设置小图标//TODO: 在此处添加额外的初始化m_CSliderCtrl.SetRange(0,255);//参考这里(http://system.tistory.com/13)m_CSliderCtrl.SetRangeMin(0);m_CSliderCtrl.SetRangeMax(255);m_CSliderCtrl.SetPos(128);m_CSliderCtrl.SetLineSize(1);m_CString.Format(_T("%d"), 0);//参考这里(http://depts.washington.edu/cmmr/biga/chapter_tutorials/1.C++_MFC_D3DOGL/1.StepByStepGuide/tutorial_3.html)返回真；//除非您将焦点设置到控件，否则返回 TRUE}void Cmfc_test5Dlg::OnSysCommand(UINT nID, LPARAM lParam){if ((nID & 0xFFF0) == IDM_ABOUTBOX){CAboutDlg dlg关于;dlgAbout.DoModal();}别的{CDialogEx::OnSysCommand(nID, lParam);}}//如果您在对话框中添加一个最小化按钮，您将需要下面的代码//绘制图标.对于使用文档/视图模型的 MFC 应用程序，//这是由框架自动为您完成的.无效 Cmfc_test5Dlg::OnPaint(){如果(IsIconic()){CPaintDC dc(这个);//绘画的设备上下文SendMessage(WM_ICONERASEBKGND, reinterpret_cast(dc.GetSafeHdc()), 0);//在客户端矩形中居中图标int cxIcon = GetSystemMetrics(SM_CXICON);int cyIcon = GetSystemMetrics(SM_CYICON)；CRect 矩形；GetClientRect(&rect);int x = (rect.Width() - cxIcon + 1)/2;int y = (rect.Height() - cyIcon + 1)/2;//绘制图标dc.DrawIcon(x, y, m_hIcon);}别的{CDialogEx::OnPaint();}}//系统调用该函数获取用户拖动时要显示的光标//最小化的窗口.HCURSOR Cmfc_test5Dlg::OnQueryDragIcon(){返回 static_cast<HCURSOR>(m_hIcon);}无效 Cmfc_test5Dlg::OnNMReleasedcaptureSlider1(NMHDR *pNMHDR, LRESULT *pResult){//TODO: 在此处添加您的控件通知处理程序代码int 值 = m_CSliderCtrl.GetPos();//参考这里(http://depts.washington.edu/cmmr/biga/chapter_tutorials/1.C++_MFC_D3DOGL/1.StepByStepGuide/tutorial_3.html)m_CString.Format(_T("%d"), value);更新数据(假)；*p结果 = 0;}无效 Cmfc_test5Dlg::OnDropFiles(HDROP hDropInfo){诠释 nFiles;静态字符 szPathName[MAX_PATH];//파일 경로면이 들어간다.CString 字符串文件名；::DragQueryFile(hDropInfo, 0, szPathName, MAX_PATH);::DragFinish(hDropInfo);CDialog::OnDropFiles(hDropInfo);CDialogEx::OnDropFiles(hDropInfo);文件位置 = szPathName;如果(m_pTestView！= NULL)m_pTestView->DoDisplayImage();}int Cmfc_test5Dlg::OnCreate(LPCREATESTRUCT lpCreateStruct){if (CDialogEx::OnCreate(lpCreateStruct) == -1)返回-1；//TODO: 在此处添加您的专用创建代码返回0；}无效 OffsetChildWindow(CWnd* 孩子，int dx，int dy，int dw，int dh){如果(！孩子){返回;//添加错误处理，控制不退出}if (!child->GetParent()){返回;}//查找子窗口相对于父窗口左上角的坐标CRect rc;child->GetClientRect(&rc);C点 p(0, 0);ScreenToClient(child->GetParent()->GetSafeHwnd(), &p);rc.OffsetRect(p);//防止负大小if ((rc.Width() + dw) <0) dw = -rc.Width();if ((rc.Height() + dh) <0) dh = -rc.Height();child->SetWindowPos(0, rc.left + dx, rc.top + dy, rc.Width() + dw, rc.Height() + dh, SWP_NOZORDER);孩子->无效(FALSE)；}无效 Cmfc_test5Dlg::OnSize(UINT nType, int cx, int cy){CDialogEx::OnSize(nType, cx, cy);//TODO: 在此处添加您的消息处理程序代码如果 (!cx || !cy)返回;如果(m_pTestView){m_pTestView->MoveWindow(0, 0, cx-200, cy);}int dx = cx - m_SaveRect.right;int dy = cy - m_SaveRect.bottom;OffsetChildWindow(GetDlgItem(IDC_SLIDER1), 0,dy,dx,0);GetClientRect(&m_SaveRect);}

这里是头文件.

//mfc_test5Dlg.h : 头文件//#pragma 一次#包括afxcmn.h"#include "Testview.h"#include atltypes.h"//Cmfc_test5Dlg 对话框类 Cmfc_test5Dlg:公共 CDialogEx{//建造上市:Cmfc_test5Dlg(CWnd* pParent = NULL);//标准构造函数//对话数据枚举 { IDD = IDD_MFC_TEST5_DIALOG };受保护:虚拟无效 DoDataExchange(CDataExchange* pDX);//DDX/DDV 支持//执行受保护:HICON m_hIcon;//生成的消息映射函数虚拟 BOOL OnInitDialog();afx_msg void OnSysCommand(UINT nID, LPARAM lParam);afx_msg 无效 OnPaint();afx_msg HCURSOR OnQueryDragIcon();DECLARE_MESSAGE_MAP()上市:CSliderCtrl m_CSliderCtrl;私人的:CString m_CString;上市:afx_msg void OnNMReleasedcaptureSlider1(NMHDR *pNMHDR, LRESULT *pResult);afx_msg 无效 OnDropFiles(HDROP hDropInfo);afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);CTestview *m_pTestView;afx_msg void OnSize(UINT nType, int cx, int cy);CRect m_SaveRect;};

更新 3

我已经更新了.但它并不能很好地工作.当我将对话框调整到左边一点时.

当我将对话框调整到左边这么多时.

当我向右调整对话框大小时.

解决方案

另一种方法，使用这个函数:

void OffsetChildWindow(CWnd* child, int dx, int dy, int dw, int dh){如果(！孩子)返回；if (!child->GetParent()) 返回；if (!IsWindow(child->m_hWnd)) 返回；//查找子窗口相对于父窗口左上角的坐标CRect rc;child->GetWindowRect(&rc);C点 p(0, 0);ScreenToClient(child->GetParent()->GetSafeHwnd(), &p);rc.OffsetRect(p);//防止负大小if ((rc.Width() + dw) <0) dw = -rc.Width();if ((rc.Height() + dh) <0) dh = -rc.Height();child->SetWindowPos(0, rc.left + dx, rc.top + dy, rc.Width() + dw, rc.Height() + dh, SWP_NOZORDER);孩子->无效(FALSE)；}

如下声明一个成员变量:CRect m_SaveRect;

//初始化BOOL CMyDialog::OnInitDialog(){CDialogEx::OnInitDialog();GetClientRect(&m_SaveRect);...}无效 CMyDialog::OnSize(UINT f, int cx, int cy){CDialogEx::OnSize(f, cx, cy);如果 (!cx || !cy)返回;//(至少有一个子控件需要这个错误检查)如果(！GetDlgItem(IDOK))返回；//还没有准备好int dx = cx - m_SaveRect.right;int dy = cy - m_SaveRect.bottom;OffsetChildWindow(GetDlgItem(IDCANCEL), dx, dy, 0, 0);OffsetChildWindow(GetDlgItem(IDOK), dx, dy, 0, 0);OffsetChildWindow(GetDlgItem(IDC_SLIDER1), 0, dy, dx, 0);OffsetChildWindow(GetDlgItem(IDC_EDIT1), 0, 0, dx, dy);GetClientRect(&m_SaveRect);}

如果您只需要水平/垂直偏移之一，

dx 或 dy 可以为零.

在我们这样做的同时，您可能还需要在消息映射中添加 ON_WM_GETMINMAXINFO 以防止对话框变得太小:

void CMyDialog::OnGetMinMaxInfo(MINMAXINFO *mx){mx->ptMinTrackSize.x = 400；//最小400x300尺寸mx->ptMinTrackSize.y = 300;CDialogEx::OnGetMinMaxInfo(mx);}

-------------------------------------------------------

编辑 2

编辑 3

复制/粘贴这两个函数 OffsetChildWindow 和 Cmfc_test5Dlg::OnSize 并删除旧函数.我已经更新了.

void OffsetChildWindow(CWnd* child, int dx, int dy, int dw, int dh){如果(！孩子)返回；if (!child->GetParent()) 返回；if (!IsWindow(child->m_hWnd)) 返回；//查找子窗口相对于父窗口左上角的坐标CRect rc;child->GetWindowRect(&rc);C点 p(0, 0);ScreenToClient(child->GetParent()->GetSafeHwnd(), &p);rc.OffsetRect(p);//防止负大小if ((rc.Width() + dw) <0) dw = -rc.Width();if ((rc.Height() + dh) <0) dh = -rc.Height();child->SetWindowPos(0, rc.left + dx, rc.top + dy, rc.Width() + dw, rc.Height() + dh, SWP_NOZORDER);孩子->无效(FALSE)；}无效 Cmfc_test5Dlg::OnSize(UINT nType, int cx, int cy){CDialogEx::OnSize(nType, cx, cy);如果 (!cx || !cy) 返回；int dx = cx - m_SaveRect.right;int dy = cy - m_SaveRect.bottom;OffsetChildWindow(m_pTestView, 0,0,dx,dy);OffsetChildWindow(GetDlgItem(IDC_SLIDER1), dx,dy,0,0);OffsetChildWindow(GetDlgItem(IDC_EDIT1), dx,dy,0,0);GetClientRect(&m_SaveRect);}

I've made a view on dialog in MFC.

You can see well from the following image.(like slider control and edit box, etc)

These controls are not moved when I resize a dialog size.

enter image description here

I'd like to move the controls to fit dialog. but not need to resize of controls.

What should I do for solving for this problem?

update 1

Especially, I want to set the slider position.

So firstly, I add member variable of slider 'CSliderCtrl sss' to dialog class then I made this in OnSize();

 OnSize()
{
....
sss.MoveWindow(10, 10,cx-20,cy-60);
....

}

BTW, the problem is that the first position of slider difference between after resize of dialog.

So I want to know that how to set first position of slider in InitialDialog.

update 2

I've got followed up with your source. but it's difference working between you and me.

When I run first I got this

When I resize the dialog a very little I got this

As you can see, the slider is disappeared.

I have update here the MyDlg.cpp

// mfc_test5Dlg.cpp : implementation file
//

#include "stdafx.h"
#include "mfc_test5.h"
#include "mfc_test5Dlg.h"
#include "afxdialogex.h"
#include "Testview.h"
#include <Magick++.h>
extern CTestview *global_TestView;
char * fileposition;


#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// CAboutDlg dialog used for App About

class CAboutDlg : public CDialogEx
{
public:
    CAboutDlg();

    // Dialog Data
    enum { IDD = IDD_ABOUTBOX };

protected:
    virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support

    // Implementation
protected:
    DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialogEx(CAboutDlg::IDD)
{
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
    CDialogEx::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialogEx)
END_MESSAGE_MAP()


// Cmfc_test5Dlg dialog




Cmfc_test5Dlg::Cmfc_test5Dlg(CWnd* pParent /*=NULL*/)
    : CDialogEx(Cmfc_test5Dlg::IDD, pParent)
    , m_CString(_T(""))
{
    m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
    fileposition = (char*)this;
    m_pTestView = NULL;
}

void Cmfc_test5Dlg::DoDataExchange(CDataExchange* pDX)
{
    CDialogEx::DoDataExchange(pDX);
    DDX_Control(pDX, IDC_SLIDER1, m_CSliderCtrl);
    DDX_Text(pDX, IDC_EDIT1, m_CString);
}

BEGIN_MESSAGE_MAP(Cmfc_test5Dlg, CDialogEx)
    ON_WM_SYSCOMMAND()
    ON_WM_PAINT()
    ON_WM_QUERYDRAGICON()
    ON_NOTIFY(NM_RELEASEDCAPTURE, IDC_SLIDER1, &Cmfc_test5Dlg::OnNMReleasedcaptureSlider1)
    ON_WM_DROPFILES()
    ON_WM_CREATE()
    ON_WM_SIZE()
END_MESSAGE_MAP()



BOOL Cmfc_test5Dlg::OnInitDialog()
{

    CDialogEx::OnInitDialog();
     GetClientRect(&m_SaveRect);

    // Add "About..." menu item to system menu.


    CRuntimeClass *pObject;
    pObject = RUNTIME_CLASS(CTestview);
    m_pTestView = (CTestview*)pObject->CreateObject();
    CRect crt;
    GetClientRect(&crt);
    int x,y;
     x = crt.Width();
     y  = crt.Height();
     //http://stackoverflow.com/questions/33653087/how-to-move-a-control-while-resizing-dialog-size-in-mfc
//   m_CSliderCtrl.SetWindowPos(0,x-293,y-125,x-293,y-125,SWP_NOSIZE /*SWP_NOZORDER*/);

    if (!m_pTestView->Create(NULL, NULL, AFX_WS_DEFAULT_VIEW, CRect(0, 0,x-200 ,y), this, AFX_IDW_PANE_FIRST, NULL))
    {
        TRACE0("Failed to create view window
");
        return -1;
    }


    // 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)
    {
        BOOL bNameValid;
        CString strAboutMenu;
        bNameValid = strAboutMenu.LoadString(IDS_ABOUTBOX);
        ASSERT(bNameValid);
        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

    // TODO: Add extra initialization here
    m_CSliderCtrl.SetRange(0,255); //Reference Here (http://system.tistory.com/13)
    m_CSliderCtrl.SetRangeMin(0);
    m_CSliderCtrl.SetRangeMax(255);
    m_CSliderCtrl.SetPos(128);
    m_CSliderCtrl.SetLineSize(1);
    m_CString.Format(_T("%d"), 0); //Reference here (http://depts.washington.edu/cmmr/biga/chapter_tutorials/1.C++_MFC_D3DOGL/1.StepByStepGuide/tutorial_3.html)


    return TRUE;  // return TRUE  unless you set the focus to a control
}

void Cmfc_test5Dlg::OnSysCommand(UINT nID, LPARAM lParam)
{
    if ((nID & 0xFFF0) == IDM_ABOUTBOX)
    {
        CAboutDlg dlgAbout;
        dlgAbout.DoModal();
    }
    else
    {
        CDialogEx::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 Cmfc_test5Dlg::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
    {
        CDialogEx::OnPaint();
    }
}

// The system calls this function to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR Cmfc_test5Dlg::OnQueryDragIcon()
{
    return static_cast<HCURSOR>(m_hIcon);
}



void Cmfc_test5Dlg::OnNMReleasedcaptureSlider1(NMHDR *pNMHDR, LRESULT *pResult)
{
    // TODO: Add your control notification handler code here
    int value = m_CSliderCtrl.GetPos(); //Reference Here (http://depts.washington.edu/cmmr/biga/chapter_tutorials/1.C++_MFC_D3DOGL/1.StepByStepGuide/tutorial_3.html)
    m_CString.Format(_T("%d"), value);
    UpdateData(FALSE);

    *pResult = 0;
}


void Cmfc_test5Dlg::OnDropFiles(HDROP hDropInfo)
{

    int nFiles;
    static char szPathName[MAX_PATH]; // 파일 경로면이 들어간다.
    CString strFileName;

    ::DragQueryFile(hDropInfo, 0, szPathName, MAX_PATH);

    ::DragFinish(hDropInfo);
    CDialog::OnDropFiles(hDropInfo);
    CDialogEx::OnDropFiles(hDropInfo);

    fileposition = szPathName;
    if (m_pTestView != NULL)
        m_pTestView->DoDisplayImage();


}


int Cmfc_test5Dlg::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
    if (CDialogEx::OnCreate(lpCreateStruct) == -1)
        return -1;

    // TODO:  Add your specialized creation code here


    return 0;
}

void OffsetChildWindow(CWnd* child, int dx, int dy, int dw, int dh)
{
    if (!child)
    {
        return; //Add error handling, control does not exits
    }

    if (!child->GetParent()) 
    {
        return;
    }

    //find child window's coordinates relative to top-left of parent
    CRect rc;
    child->GetClientRect(&rc);
    CPoint p(0, 0);
    ScreenToClient(child->GetParent()->GetSafeHwnd(), &p);
    rc.OffsetRect(p);

    //prevent negative size
    if ((rc.Width() + dw) < 0) dw = -rc.Width();
    if ((rc.Height() + dh) < 0) dh = -rc.Height();

   child->SetWindowPos(0, rc.left + dx, rc.top + dy, rc.Width() + dw, rc.Height() + dh, SWP_NOZORDER);


    child->Invalidate(FALSE);
}

void Cmfc_test5Dlg::OnSize(UINT nType, int cx, int cy)
{
    CDialogEx::OnSize(nType, cx, cy);

    // TODO: Add your message handler code here

    if (!cx || !cy)
        return;


    if (m_pTestView)
    {
        m_pTestView->MoveWindow(0, 0, cx-200, cy);
    }


    int dx = cx - m_SaveRect.right;
    int dy = cy - m_SaveRect.bottom;

    OffsetChildWindow(GetDlgItem(IDC_SLIDER1), 0,dy,dx,0);
    GetClientRect(&m_SaveRect);

}

and here is header file.

// mfc_test5Dlg.h : header file
//

#pragma once
#include "afxcmn.h"
#include "Testview.h"
#include "atltypes.h"



// Cmfc_test5Dlg dialog
class Cmfc_test5Dlg : public CDialogEx
{
// Construction
public:
    Cmfc_test5Dlg(CWnd* pParent = NULL);    // standard constructor

// Dialog Data
    enum { IDD = IDD_MFC_TEST5_DIALOG };

    protected:
    virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support


// Implementation
protected:
    HICON m_hIcon;

    // Generated message map functions
    virtual BOOL OnInitDialog();
    afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
    afx_msg void OnPaint();
    afx_msg HCURSOR OnQueryDragIcon();
    DECLARE_MESSAGE_MAP()
public:
    CSliderCtrl m_CSliderCtrl;
private:
    CString m_CString;
public:
    afx_msg void OnNMReleasedcaptureSlider1(NMHDR *pNMHDR, LRESULT *pResult);
    afx_msg void OnDropFiles(HDROP hDropInfo);
    afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);
    CTestview *m_pTestView;
    afx_msg void OnSize(UINT nType, int cx, int cy);
    CRect m_SaveRect;
};

update 3

I have updated. but it does not stll work well. When I resize the dialog to left a little.

when I resize the dialog to left so many.

When I resize the dialog to right.

解决方案

Another method, use this function:

void OffsetChildWindow(CWnd* child, int dx, int dy, int dw, int dh)
{
    if (!child) return;
    if (!child->GetParent()) return;
    if (!IsWindow(child->m_hWnd)) return;

    //find child window's coordinates relative to top-left of parent
    CRect rc;
    child->GetWindowRect(&rc);
    CPoint p(0, 0);
    ScreenToClient(child->GetParent()->GetSafeHwnd(), &p);
    rc.OffsetRect(p);

    //prevent negative size
    if ((rc.Width() + dw) < 0) dw = -rc.Width();
    if ((rc.Height() + dh) < 0) dh = -rc.Height();

    child->SetWindowPos(0, rc.left + dx, rc.top + dy, rc.Width() + dw, rc.Height() + dh, SWP_NOZORDER);
    child->Invalidate(FALSE);
}

Declare a member variable as follows: CRect m_SaveRect;

//Initialize
BOOL CMyDialog::OnInitDialog()
{
    CDialogEx::OnInitDialog();
    GetClientRect(&m_SaveRect);
    ...
}

void CMyDialog::OnSize(UINT f, int cx, int cy)
{
    CDialogEx::OnSize(f, cx, cy);

    if (!cx || !cy)
        return;

    //(this error check is needed on at least one child control)
    if (!GetDlgItem(IDOK)) return; //not ready yet

    int dx = cx - m_SaveRect.right;
    int dy = cy - m_SaveRect.bottom;

    OffsetChildWindow(GetDlgItem(IDCANCEL), dx, dy, 0, 0);
    OffsetChildWindow(GetDlgItem(IDOK), dx, dy, 0, 0);
    OffsetChildWindow(GetDlgItem(IDC_SLIDER1), 0, dy, dx, 0);
    OffsetChildWindow(GetDlgItem(IDC_EDIT1), 0, 0, dx, dy);

    GetClientRect(&m_SaveRect);
}

dx or dy can be zero if you need only one of horizontal/vertical offset.

While we are at it, you may also need to add ON_WM_GETMINMAXINFO to message map to prevent the dialog from becoming too small:

void CMyDialog::OnGetMinMaxInfo(MINMAXINFO *mx)
{
    mx->ptMinTrackSize.x = 400; //minimum 400x300 size
    mx->ptMinTrackSize.y = 300;
    CDialogEx::OnGetMinMaxInfo(mx);
}

-------------------------------------------------------

Edit 2

Edit 3

Copy/Paste these 2 functions OffsetChildWindow and Cmfc_test5Dlg::OnSize and remove the old functions. I have made updates.

void OffsetChildWindow(CWnd* child, int dx, int dy, int dw, int dh)
{
    if (!child) return;
    if (!child->GetParent()) return;
    if (!IsWindow(child->m_hWnd)) return;

    //find child window's coordinates relative to top-left of parent
    CRect rc;
    child->GetWindowRect(&rc);
    CPoint p(0, 0);
    ScreenToClient(child->GetParent()->GetSafeHwnd(), &p);
    rc.OffsetRect(p);

    //prevent negative size
    if ((rc.Width() + dw) < 0) dw = -rc.Width();
    if ((rc.Height() + dh) < 0) dh = -rc.Height();

    child->SetWindowPos(0, rc.left + dx, rc.top + dy, rc.Width() + dw, rc.Height() + dh, SWP_NOZORDER);
    child->Invalidate(FALSE);
}

void Cmfc_test5Dlg::OnSize(UINT nType, int cx, int cy)
{
    CDialogEx::OnSize(nType, cx, cy);
    if (!cx || !cy) return;

    int dx = cx - m_SaveRect.right;
    int dy = cy - m_SaveRect.bottom;

    OffsetChildWindow(m_pTestView, 0,0,dx,dy);
    OffsetChildWindow(GetDlgItem(IDC_SLIDER1), dx,dy,0,0);
    OffsetChildWindow(GetDlgItem(IDC_EDIT1), dx,dy,0,0);
    GetClientRect(&m_SaveRect);
}

这篇关于如何在 MFC 中调整对话框大小时移动控件?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！