如何在 MFC 中调整对话框大小时移动控件?
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];//?? ???? ????.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]; // ?? ???? ????.
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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