我有一个CResizingMFCPropertySheet有几页的。该类派生自CMFCPropertySheet. 类定义相当基本：
#include "stdafx.h"
#include "ResizingMFCPropertySheet.h"
#include "resource.h"
/////////////////////////////////////////////////////////////////////////////
// CMyPropertySheet
IMPLEMENT_DYNAMIC(CResizingMFCPropertySheet, CMFCPropertySheet)
CResizingMFCPropertySheet::CResizingMFCPropertySheet(const CString& strWindowID)
: CMFCPropertySheet()
, m_strWindowID(strWindowID)
{
}
CResizingMFCPropertySheet::CResizingMFCPropertySheet(const CString& strWindowID, UINT nIDCaption, CWnd* pParentWnd, UINT iSelectPage)
: CMFCPropertySheet(nIDCaption, pParentWnd, iSelectPage)
, m_strWindowID(strWindowID)
{
}
CResizingMFCPropertySheet::CResizingMFCPropertySheet(const CString& strWindowID, LPCTSTR pszCaption, CWnd* pParentWnd, UINT iSelectPage)
: CMFCPropertySheet(pszCaption, pParentWnd, iSelectPage)
, m_strWindowID(strWindowID)
{
}
CResizingMFCPropertySheet::~CResizingMFCPropertySheet()
= default;
BEGIN_MESSAGE_MAP(CResizingMFCPropertySheet, CMFCPropertySheet)
ON_WM_SIZE()
ON_WM_GETMINMAXINFO()
ON_WM_DESTROY()
ON_WM_PAINT()
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CMyPropertySheet message handlers
int CALLBACK XmnPropSheetCallback(HWND hWnd, UINT message, LPARAM lParam)
{
extern int CALLBACK AfxPropSheetCallback(HWND, UINT message, LPARAM lParam);
// XMN: Call MFC's callback
int nRes = AfxPropSheetCallback(hWnd, message, lParam);
switch (message)
{
case PSCB_PRECREATE:
// Set our own window styles
((LPDLGTEMPLATE)lParam)->style |= (DS_3DLOOK | DS_SETFONT
| WS_THICKFRAME | WS_SYSMENU | WS_POPUP | WS_VISIBLE | WS_CAPTION | WS_CLIPCHILDREN | WS_CLIPSIBLINGS | WS_MINIMIZEBOX | WS_MAXIMIZEBOX);
break;
}
return nRes;
}
BOOL CResizingMFCPropertySheet::OnInitDialog()
{
BOOL bResult = CMFCPropertySheet::OnInitDialog();
//GetClientRect(save_rc);
GetClientRect(minimum_rc);
//InitialiseResizeIcon();
SetupDynamicLayout();
RestoreWindowPosition(m_strWindowID, this, true);
return bResult;
}
void CResizingMFCPropertySheet::OnSize(UINT nType, int cx, int cy)
{
CMFCPropertySheet::OnSize(nType, cx, cy);
/*
if (!GetActivePage()) return;
if (!GetTabControl()) return;
if (nType == SIZE_MINIMIZED)
return;
int dx = cx - save_rc.Width();
int dy = cy - save_rc.Height();
int count = 0;
for (CWnd *child = GetWindow(GW_CHILD); child; child = child->GetWindow(GW_HWNDNEXT))
count++;
HDWP hDWP = ::BeginDeferWindowPos(count);
for (CWnd *child = GetWindow(GW_CHILD); child; child = child->GetWindow(GW_HWNDNEXT))
{
bool move = false;
//If you add child controls manually, you want to move not resize
if(child == &m_lblResize && m_lblResize.GetSafeHwnd() != nullptr)
move = true;
CRect r;
child->GetWindowRect(&r);
ScreenToClient(&r);
if (move || child->SendMessage(WM_GETDLGCODE) & DLGC_BUTTON)
{
//move the main buttons and the child controls
r.left += dx;
r.top += dy;
::DeferWindowPos(hDWP, child->m_hWnd, 0, r.left, r.top, 0, 0,
SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE);
}
else
{
if (child->GetSafeHwnd() == m_pNavigationControl->GetSafeHwnd())
{
r.bottom += dy;
::DeferWindowPos(hDWP, child->m_hWnd, nullptr,
r.left, r.top, r.Width(), r.Height(),
SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE);
}
else
{
//this must be a child window, resize it
r.right += dx;
r.bottom += dy;
::DeferWindowPos(hDWP, child->m_hWnd, 0, 0, 0, r.Width(), r.Height(),
SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE);
}
}
}
::EndDeferWindowPos(hDWP);
GetClientRect(&save_rc);
Invalidate(TRUE);
*/
Invalidate(TRUE);
}
INT_PTR CResizingMFCPropertySheet::DoModal()
{
// Hook into property sheet creation code
m_psh.dwFlags |= PSH_USECALLBACK;
m_psh.pfnCallback = XmnPropSheetCallback;
return CMFCPropertySheet::DoModal();
}
void CResizingMFCPropertySheet::OnGetMinMaxInfo(MINMAXINFO* lpMMI)
{
CMFCPropertySheet::OnGetMinMaxInfo(lpMMI);
lpMMI->ptMinTrackSize.x = minimum_rc.Width();
lpMMI->ptMinTrackSize.y = minimum_rc.Height();
}
void CResizingMFCPropertySheet::InitialiseResizeIcon()
{
CRect rcIcon, rcClient;
m_bmpResize.LoadOEMBitmap(OBM_SIZE);
m_lblResize.Create(nullptr, WS_CHILD | WS_VISIBLE | SS_BITMAP | WS_CLIPSIBLINGS,
CRect(0, 0, 16, 16), this, IDC_STATIC_RESIZE);
m_lblResize.SetBitmap(m_bmpResize);
GetClientRect(rcClient);
m_lblResize.GetClientRect(rcIcon);
m_lblResize.SetWindowPos(&CWnd::wndBottom,
rcClient.right - rcIcon.Width(),
rcClient.bottom - rcIcon.Height(), 0, 0, SWP_NOSIZE);
}
void CResizingMFCPropertySheet::RestoreWindowPosition(CString strWindow, CWnd* pWindow, bool bOverrideState)
{
int max_x, max_y;
RECT rtWindow;
if (pWindow == nullptr)
return;
// Only restore if there is a previously saved position
if ((rtWindow.top = AfxGetApp()->GetProfileInt(strWindow, _T("Top"), -1)) != -1 &&
(rtWindow.left = AfxGetApp()->GetProfileInt(strWindow, _T("Left"), -1)) != -1 &&
(rtWindow.bottom = AfxGetApp()->GetProfileInt(strWindow, _T("Bottom"), -1)) != -1 &&
(rtWindow.right = AfxGetApp()->GetProfileInt(strWindow, _T("Right"), -1)))
{
max_x = rtWindow.right - rtWindow.left;
max_y = rtWindow.bottom - rtWindow.top;
// Get a handle to the monitor
HMONITOR hMonitor = ::MonitorFromPoint(
CPoint(rtWindow.left, rtWindow.top), MONITOR_DEFAULTTONEAREST);
// Get the monitor info
MONITORINFO monInfo;
monInfo.cbSize = sizeof(MONITORINFO);
if (::GetMonitorInfo(hMonitor, &monInfo) == 0)
AfxMessageBox(_T("GetMonitorInfo failed"));
else
{
// Adjust for work area
rtWindow.left += monInfo.rcWork.left - monInfo.rcMonitor.left;
rtWindow.top += monInfo.rcWork.top - monInfo.rcMonitor.top;
// Ensure top left point is on screen
if (CRect(monInfo.rcWork).PtInRect(CPoint(rtWindow.left, rtWindow.top)) == FALSE)
{
rtWindow.left = monInfo.rcWork.left;
rtWindow.top = monInfo.rcWork.top;
}
rtWindow.right = rtWindow.left + max_x;
rtWindow.bottom = rtWindow.top + max_y;
// Restore window size
pWindow->MoveWindow(&rtWindow, FALSE);
}
if (bOverrideState)
{
// Let us override by restoring the window state
int iState = AfxGetApp()->GetProfileInt(strWindow, _T("ShowCmd"), SW_SHOWNORMAL);
pWindow->ShowWindow(iState);
}
}
}
void CResizingMFCPropertySheet::SaveWindowPosition(CString strWindow, CWnd* pWindow)
{
WINDOWPLACEMENT wp;
if (pWindow == nullptr)
return;
pWindow->GetWindowPlacement(&wp);
// Commit to registry
AfxGetApp()->WriteProfileInt(strWindow, _T("Top"), wp.rcNormalPosition.top);
AfxGetApp()->WriteProfileInt(strWindow, _T("Left"), wp.rcNormalPosition.left);
AfxGetApp()->WriteProfileInt(strWindow, _T("Bottom"), wp.rcNormalPosition.bottom);
AfxGetApp()->WriteProfileInt(strWindow, _T("Right"), wp.rcNormalPosition.right);
AfxGetApp()->WriteProfileInt(strWindow, _T("ShowCmd"), wp.showCmd);
}
void CResizingMFCPropertySheet::OnDestroy()
{
SaveWindowPosition(m_strWindowID, this);
CMFCPropertySheet::OnDestroy();
}
CWnd* CResizingMFCPropertySheet::InitNavigationControl()
{
m_pNavigationControl = CMFCPropertySheet::InitNavigationControl();
return m_pNavigationControl;
}
void CResizingMFCPropertySheet::SetupDynamicLayout()
{
EnableDynamicLayout(TRUE);
auto pManager = GetDynamicLayout();
if (pManager != nullptr)
{
pManager->Create(this);
// The navigation control only needs to be stretched vertically
pManager->AddItem(m_pNavigationControl->GetSafeHwnd(),
CMFCDynamicLayout::MoveNone(), CMFCDynamicLayout::SizeVertical(100));
// The resize control needs to be moved 100% in both directions
//pManager->AddItem(m_lblResize.GetSafeHwnd(),
//CMFCDynamicLayout::MoveHorizontalAndVertical(100, 100), CMFCDynamicLayout::SizeNone());
for (CWnd *child = GetWindow(GW_CHILD); child; child = child->GetWindow(GW_HWNDNEXT))
{
if (child->GetSafeHwnd() != m_lblResize.GetSafeHwnd() &&
child->GetSafeHwnd() != m_pNavigationControl->GetSafeHwnd())
{
// All buttons need to be moved 100% in all directions
if (child->SendMessage(WM_GETDLGCODE) & DLGC_BUTTON)
{
pManager->AddItem(child->GetSafeHwnd(),
CMFCDynamicLayout::MoveHorizontalAndVertical(100, 100), CMFCDynamicLayout::SizeNone());
}
else // This will be the main tab control which needs to be stretched in both directions
{
pManager->AddItem(child->GetSafeHwnd(),
CMFCDynamicLayout::MoveNone(), CMFCDynamicLayout::SizeHorizontalAndVertical(100, 100));
}
}
}
}
}
INT_PTR CResizingMFCPropertySheet::OnToolHitTest(CPoint point, TOOLINFO* pTI) const
{
CRect rc;
GetWindowRect(rc);
rc.left = rc.right - ::GetSystemMetrics(SM_CXHSCROLL);
rc.top = rc.bottom - ::GetSystemMetrics(SM_CYVSCROLL);
if (rc.PtInRect(point))
return HTBOTTOMRIGHT;
return CMFCPropertySheet::OnToolHitTest(point, pTI);
}
void CResizingMFCPropertySheet::OnPaint()
{
CPaintDC dc(this); // device context for painting
// TODO: Add your message handler code here
// Do not call CResizingMFCPropertySheet::OnPaint() for painting messages
CRect rc;
GetClientRect(&rc);
rc.left = rc.right - ::GetSystemMetrics(SM_CXHSCROLL);
rc.top = rc.bottom - ::GetSystemMetrics(SM_CYVSCROLL);
HTHEME ht = OpenThemeData(GetSafeHwnd(), L"STATUS");
if (ht)
{
DrawThemeBackground(ht, dc, SP_GRIPPER, 0, &rc, nullptr);
CloseThemeData(ht);
}
else
{
dc.DrawFrameControl(rc, DFC_SCROLL, DFCS_SCROLLSIZEGRIP);
}
}
在大多数情况下，它的行为如我所愿。但是我有一个问题，它让我将工作表的高度调整得太小。例如，这是我在 IDE 中的页面之一：
所有其他页面的设计高度完全相同。然而，当我显示工作表时，我可以像这样调整它的大小：
如您所见，它使我可以将高度降低太多。我们有这个处理程序：
void CResizingMFCPropertySheet::OnGetMinMaxInfo(MINMAXINFO* lpMMI)
{
CMFCPropertySheet::OnGetMinMaxInfo(lpMMI);
lpMMI->ptMinTrackSize.x = minimum_rc.Width();
lpMMI->ptMinTrackSize.y = minimum_rc.Height();
}
并且，minimum_rc定义在OnInitDialog：
BOOL CResizingMFCPropertySheet::OnInitDialog()
{
BOOL bResult = CMFCPropertySheet::OnInitDialog();
//GetClientRect(save_rc);
GetClientRect(minimum_rc);
//InitialiseResizeIcon();
SetupDynamicLayout();
RestoreWindowPosition(m_strWindowID, this, true);
return bResult;
}
所以我被难住了。如何防止这张纸在高度上调整得太小？