我有一个带有旋转控件的编辑控件,初始位置设置为0。单击向上箭头时,编辑框从0变为1,这很好。但是,当我使用GetPos()时,MyValue为0。当旋转控件从1再次增加到2时,MyValue变为1。按下向下箭头时,编辑框从2变为1,但值变为2。似乎MyValue始终是自旋控件后面的一项操作。
BOOL CAlphaDlg::OnInitDialog()
{
// default code left out to keep it short ...
// TODO: Add extra initialization here
// set range and initial position
mSpinControl.SetRange(0, 3600); // range
mSpinControl.SetPos(0); // inital position
MyValue = mSpinControl.GetPos();
// display initial value in buddy editcontrol
mEditControlDisplay.Format("%d", MyValue);
UpdateData(false);
return TRUE;
}
void CAlphaDlg::OnDeltaposSpin1(NMHDR *pNMHDR, LRESULT *pResult)
{
LPNMUPDOWN pNMUpDown = reinterpret_cast<LPNMUPDOWN>(pNMHDR);
// TODO: Add your control notification handler code here
UpdateData(true);
int MyValue= mSpinControl.GetPos();
std::cout << MyValue << std::endl;
*pResult = 0;
}
我尝试从editcontrol获取值,但是该值表现出相同的行为。如何获取GetPos()的值以匹配编辑控件中显示的内容?
谢谢。
edit :这是完整的代码
// AlphaDlg.cpp : implementation file
//
#include "stdafx.h"
#include "Alpha.h"
#include "AlphaDlg.h"
#include "afxdialogex.h"
#include <iostream>
#ifdef _DEBUG
#define new DEBUG_NEW
#endif
// CAboutDlg dialog used for App About
class CAboutDlg : public CDialogEx
{
public:
CAboutDlg();
// Dialog Data
#ifdef AFX_DESIGN_TIME
enum { IDD = IDD_ABOUTBOX };
#endif
protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
// Implementation
protected:
DECLARE_MESSAGE_MAP()
};
CAboutDlg::CAboutDlg() : CDialogEx(IDD_ABOUTBOX)
{
}
void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
CDialogEx::DoDataExchange(pDX);
}
BEGIN_MESSAGE_MAP(CAboutDlg, CDialogEx)
END_MESSAGE_MAP()
// CAlphaDlg dialog
CAlphaDlg::CAlphaDlg(CWnd* pParent /*=NULL*/)
: CDialogEx(IDD_ALPHA_DIALOG, pParent)
, mEditControlDisplay(_T(""))
{
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}
void CAlphaDlg::DoDataExchange(CDataExchange* pDX)
{
CDialogEx::DoDataExchange(pDX);
DDX_Text(pDX, IDC_EDIT1, mEditControlDisplay);
DDX_Control(pDX, IDC_SPIN1, mSpinControl);
}
BEGIN_MESSAGE_MAP(CAlphaDlg, CDialogEx)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_NOTIFY(UDN_DELTAPOS, IDC_SPIN1, &CAlphaDlg::OnDeltaposSpin1)
END_MESSAGE_MAP()
// CAlphaDlg message handlers
BOOL CAlphaDlg::OnInitDialog()
{
CDialogEx::OnInitDialog();
// 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)
{
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
mSpinControl.SetRange(0, 10);
mSpinControl.SetPos(0);
int MyValue = mSpinControl.GetPos();
mEditControlDisplay.Format("%d", MyValue);
UpdateData(false);
return TRUE; // return TRUE unless you set the focus to a control
}
void CAlphaDlg::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 CAlphaDlg::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 CAlphaDlg::OnQueryDragIcon()
{
return static_cast<HCURSOR>(m_hIcon);
}
void CAlphaDlg::OnDeltaposSpin1(NMHDR *pNMHDR, LRESULT *pResult)
{
LPNMUPDOWN pNMUpDown = reinterpret_cast<LPNMUPDOWN>(pNMHDR);
// TODO: Add your control notification handler code here
*pResult = 0;
UpdateData(true);
int MyValue = mSpinControl.GetPos();
std::cout << mEditControlDisplay << std::endl;
std::cout << MyValue << std::endl;
}
答案 0 :(得分:2)
首先,考虑将您的编辑框映射到int
,然后就不需要强制转换为字符串。且默认值从0开始,因此微调器将正常运行。您还可以关闭自动伙伴。
在deltapos处理程序中,您可以这样做:
void CMFCApplication1Dlg::OnDeltaposSpin1(NMHDR *pNMHDR, LRESULT *pResult)
{
LPNMUPDOWN pNMUpDown = reinterpret_cast<LPNMUPDOWN>(pNMHDR);
// TODO: Add your control notification handler code here
*pResult = 0;
SetDlgItemInt(IDC_EDIT1, pNMUpDown->iPos);
UpdateData(TRUE);
CString a;
a.Format(_T("%d"), iNumberValue);
AfxMessageBox(a);
}
对我来说,弹出消息和编辑控件中的结果相同。
您可以通过查看结构来锻炼新价值:
void CMFCApplication1Dlg::OnDeltaposSpin1(NMHDR *pNMHDR, LRESULT *pResult)
{
LPNMUPDOWN pNMUpDown = reinterpret_cast<LPNMUPDOWN>(pNMHDR);
int iCurrentPos = pNMUpDown->iPos;
if (pNMUpDown->iDelta > 0)
iCurrentPos++;
else
iCurrentPos--;
CString strNewValue;
strNewValue.Format(_T("%d"), iCurrentPos);
AfxMessageBox(strNewValue);
*pResult = 0;
}
您可能需要考虑一下CSpinButtonCtrl::SetAccel
,它为旋转按钮控件设置了加速度。
在您的情况下,我认为这无关紧要,因为您的范围只有10 单位。但是,如果范围较大,则可能会增加一个以上的单位。这只是要记住的事情。
根据对UDN_DELTAPOS
的引用,它说:
结构的 iDelta 成员是一个带符号的整数,其中包含拟议的位置更改。
因此,您可以基于 iDelta
值而不是1来改进代码和增加/减少。这将有助于加速。所以:
int iCurrentPos = pNMUpDown->iPos + pNMUpDown->iDelta;