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?
本文介绍了如何在MFC中调整对话框大小时移动控件？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我可以从下面的图片看到（像滑块控制和编辑框等）
p>在调整对话框大小时，这些控件不会移动。
当我调整对话框的大小时，我得到了
如您所见，滑块已消失。
我在这里更新了MyDlg.cpp
// mfc_test5Dlg.cpp：implementation file
//
#includestdafx.h
#includemfc_test5.h
#includemfc_test5Dlg.h
#includeafxdialogex.h
#includeTestview.h
#include< Magick ++。h>
extern CTestview * global_TestView;
char * fileposition;
#ifdef _DEBUG
#define new DEBUG_NEW
#endif
//用于App的CAboutDlg对话框关于
class CAboutDlg：public CDialogEx
{
public：
CAboutDlg（）;
//对话框数据
枚举{IDD = IDD_ABOUTBOX};
protected：
virtual void DoDataExchange（CDataExchange * pDX）; // DDX / DDV支持
//实现
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对话框
Cmfc_test5Dlg :: Cmfc_test5Dlg（CWnd * pParent / * = NULL * /）
：CDialogEx（Cmfc_test5Dlg :: IDD，pParent）
，m_CString ））
{
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）;
//将About ...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）;
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（无法创建视图窗口\\\
）;
return -1;
}
// IDM_ABOUTBOX必须在系统命令范围内。
ASSERT（（IDM_ABOUTBOX& 0xFFF0）== IDM_ABOUTBOX）;
ASSERT（IDM_ABOUTBOX< 0xF000）;
CMenu * pSysMenu = GetSystemMenu（FALSE）;
如果（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）;
}
}
//设置此对话框的图标。框架自动
//当应用程序的主窗口不是对话框时
SetIcon（m_hIcon，TRUE）; // Set big icon
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）; // 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 ; //返回TRUE，除非将焦点设置为控件
}
void Cmfc_test5Dlg :: OnSysCommand（UINT nID，LPARAM lParam）
{
if（ & 0xFFF0）== IDM_ABOUTBOX）
{
CAboutDlg dlgAbout;
dlgAbout.DoModal（）;
}
else
{
CDialogEx :: OnSysCommand（nID，lParam）;
}
}
//如果您在对话框中添加了一个最小化按钮，您将需要
//下面的代码来绘制图标。对于使用文档/视图模型的MFC应用程序，
//这是由框架自动完成的。
void Cmfc_test5Dlg :: OnPaint（）
{
if（IsIconic（））
{
CPaintDC dc（this）; //用于绘画的设备上下文
SendMessage（WM_ICONERASEBKGND，reinterpret_cast< WPARAM>（dc.GetSafeHdc（）），0）;
//客户端矩形中的中心图标
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;
//绘制图标
dc.DrawIcon（x，y，m_hIcon）;
}
else
{
CDialogEx :: OnPaint（）;
}
}
//当用户拖动
//最小化窗口时，系统调用此函数获取要显示的游标。
HCURSOR Cmfc_test5Dlg :: OnQueryDragIcon（）
{
return static_cast< HCURSOR>（m_hIcon）;
}
void Cmfc_test5Dlg :: OnNMReleasedcaptureSlider1（NMHDR * pNMHDR，LRESULT * pResult）
{
// TODO：控制通知处理程序代码在这里
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]; //파일경로면이들어간다
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：在这里添加专门的创建代码
return 0;
}
void OffsetChildWindow（CWnd * child，int dx，int dy，int dw，int dh）
{
if（！child）
{
return; //添加错误处理，控制不退出
}
if（！child-> GetParent（））
{
return;
}
//查找子窗口相对于父对象左上角的坐标
CRect rc;
child-> GetClientRect（& rc）;
CPoint 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）;
child->无效（FALSE）;
}
void Cmfc_test5Dlg :: OnSize（UINT nType，int cx，int cy）
{
CDialogEx :: OnSize（nType，cx，cy）;
// TODO：在这里添加消息处理程序代码
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）;
}
这里是头文件。
// mfc_test5Dlg.h：头文件
//
#pragma once
#include afxcmn.h
#includeTestview.h
#includeatltypes.h
// Cmfc_test5Dlg对话框
class Cmfc_test5Dlg：public CDialogEx
{
// Construction
public：
Cmfc_test5Dlg（CWnd * pParent = NULL）; //标准构造函数
//对话框数据
枚举{IDD = IDD_MFC_TEST5_DIALOG};
protected：
virtual void DoDataExchange（CDataExchange * pDX）; // DDX / DDV支持
//实现
protected：
HICON m_hIcon;
//生成的消息映射函数
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
};
更新3
但它不stll工作很好。
当我调整对话框的大小左。
当我调整对话框的大小留下这么多。
当我将对话框调整到右边。
< a href =http://i.stack.imgur.com/uTxbU.png =nofollow>
------------------------- ------------------------------
编辑2
复制/粘贴这两个函数
code> OffsetChildWindow 和 Cmfc_test5Dlg :: OnSize 并删除旧的函数。我已更新。 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;
//查找子窗口相对于父对象左上角的坐标
CRect rc;
child-> GetWindowRect（& rc）;
CPoint 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）;
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）;
}
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.
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\n");
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);
}
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