我已经在 MFC 中创建了对话框视图。
从下图中可以清楚地看到。（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。
在此输入图像描述 https://i.stack.imgur.com/7OxAK.jpg
我想移动控件以适应对话框。但不需要调整控件的大小。
我应该做什么来解决这个问题？
特别是，我想设置滑块位置。
因此，首先，我将滑块“CSliderCtrl sss”的成员变量添加到对话框类中，然后在 OnSize() 中进行此操作；
OnSize()
{
....
sss.MoveWindow(10, 10,cx-20,cy-60);
....
}
顺便说一句，问题是调整对话框大小后滑块的第一个位置存在差异。
所以我想知道如何在初始对话框中设置滑块的第一个位置。
我已经追踪到你的消息来源了。但你我之间的工作是有区别的。
When I run first I got this
When I resize the dialog a very little I got this
如您所见，滑块消失了。
我在这里更新了 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);
}
这是头文件。
// 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;
};
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.
另一种方法，使用这个函数：
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);
}
声明一个成员变量如下：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如果您只需要水平/垂直偏移之一，则可以为零。
当我们这样做时，您可能还需要添加ON_WM_GETMINMAXINFO消息映射以防止对话框变得太小：
void CMyDialog::OnGetMinMaxInfo(MINMAXINFO *mx)
{
mx->ptMinTrackSize.x = 400; //minimum 400x300 size
mx->ptMinTrackSize.y = 300;
CDialogEx::OnGetMinMaxInfo(mx);
}
Edit 2
Edit 3
复制/粘贴这 2 个函数OffsetChildWindow and Cmfc_test5Dlg::OnSize并删除旧功能。我已经做了更新。
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;
//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);
}