propertyitemeditors.h

这是一本学习 window编程的很好的参考教材

      return 0;
   }

   // Calendar message handlers
   
   LRESULT OnKillFocus(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/)
   {
      LRESULT lRes = m_wndCalendar.DefWindowProc();
      m_wndCalendar.ShowWindow(SW_HIDE);
      return lRes;
   }

   // Ownerdrawn button message handler

   LRESULT OnDrawItem(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM lParam, BOOL& /*bHandled*/)
   {
      LPDRAWITEMSTRUCT lpdis = (LPDRAWITEMSTRUCT) lParam;
      if( m_wndButton != lpdis->hwndItem ) return 0;
      CDCHandle dc(lpdis->hDC);
      // Paint as dropdown button
      dc.DrawFrameControl(&lpdis->rcItem, DFC_SCROLL, (lpdis->itemState & ODS_SELECTED) ? DFCS_SCROLLDOWN | DFCS_PUSHED : DFCS_SCROLLDOWN);
      return 0;
   }
};


/////////////////////////////////////////////////////////////////////////////
// Editor with dropdown list

class CPropertyListWindow : 
   public CPropertyDropWindowImpl<CPropertyListWindow>
{
public:
   DECLARE_WND_SUPERCLASS(_T("WTL_InplacePropertyList"), CEdit::GetWndClassName())

   CContainedWindowT<CListBox> m_wndList;
   int m_cyList;      // Used to resize the listbox when first shown

   typedef CPropertyDropWindowImpl<CPropertyListWindow> baseClass;

   BEGIN_MSG_MAP(CPropertyListWindow)
      MESSAGE_HANDLER(WM_CREATE, OnCreate)
      MESSAGE_HANDLER(WM_DESTROY, OnDestroy)
      MESSAGE_HANDLER(WM_CHAR, OnChar)
      MESSAGE_HANDLER(WM_DRAWITEM, OnDrawItem)
      COMMAND_CODE_HANDLER(BN_CLICKED, OnButtonClicked)
      CHAIN_MSG_MAP(baseClass)
   ALT_MSG_MAP(1) // Button
      CHAIN_MSG_MAP_ALT(baseClass, 1)
   ALT_MSG_MAP(2) // List
      MESSAGE_HANDLER(WM_KEYDOWN, OnKeyDown)
      MESSAGE_HANDLER(WM_KILLFOCUS, OnKillFocus)
      MESSAGE_HANDLER(WM_LBUTTONUP, OnLButtonUp)
   END_MSG_MAP()

   void AddItem(LPCTSTR pstrItem)
   {
      ATLASSERT(m_wndList.IsWindow());
      ATLASSERT(!::IsBadStringPtr(pstrItem,-1));
      m_wndList.AddString(pstrItem);
      m_cyList = 0;
   }
   void SelectItem(int idx)
   {
      ATLASSERT(m_wndList.IsWindow());      
      m_wndList.SetCurSel(idx);
   }

   LRESULT OnCreate(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& bHandled)
   {
      // Create dropdown list (as hidden)
      RECT rc = CWindow::rcDefault;
      m_wndList.Create(this, 2, m_hWnd, &rc, NULL, WS_POPUP | WS_BORDER | WS_VSCROLL);
      ATLASSERT(m_wndList.IsWindow());
      m_wndList.SetFont( CWindow(GetParent()).GetFont() );
      // Go create the rest of the control...
      bHandled = FALSE;
      return 0;
   }
   LRESULT OnDestroy(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& bHandled)
   {
      if( m_wndList.IsWindow() ) m_wndList.DestroyWindow();
      bHandled = FALSE;
      return 0;
   }
   LRESULT OnChar(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& /*bHandled*/)
   {
      // Let the dropdown-box handle the keypress...
      if( m_wndList.GetStyle() & WS_VISIBLE ) {
         m_wndList.PostMessage(uMsg, wParam, lParam);
      }
      else {
         TCHAR szStr[] = { (TCHAR) wParam, _T('\0') };
         int idx = m_wndList.FindString(-1, szStr);
         if( idx == LB_ERR ) return 0;
         m_wndList.SetCurSel(idx);
         BOOL bDummy;
         OnKeyDown(WM_KEYDOWN, VK_RETURN, 0, bDummy);      
      }
      return 0; // Don't allow any editing
   }
   LRESULT OnButtonClicked(WORD /*wNotifyCode*/, WORD /*wID*/, HWND /*hWndCtl*/, BOOL& /*bHandled*/)
   {
      if( m_cyList == 0 ) {
         // Resize list to fit all items (but not more than 140 pixels)
         const int MAX_HEIGHT = 140;
         int cy = m_wndList.GetCount() * m_wndList.GetItemHeight(0);
         m_cyList = min( MAX_HEIGHT, cy + (::GetSystemMetrics(SM_CYBORDER)*2) );
      }
      // Move the dropdown under the item
      RECT rcWin;
      GetWindowRect(&rcWin);
      RECT rc = { rcWin.left, rcWin.bottom, rcWin.right, rcWin.bottom + m_cyList };
      m_wndList.SetWindowPos(HWND_TOPMOST, &rc, SWP_SHOWWINDOW);
      return 0;
   }

   // List message handlers
   
   LRESULT OnKeyDown(UINT /*uMsg*/, WPARAM wParam, LPARAM /*lParam*/, BOOL& bHandled)
   {
      switch( wParam ) {
      case VK_RETURN:
         {
            int idx = m_wndList.GetCurSel();
            if( idx >= 0 ) {
               // Copy text from list to item
               int len = m_wndList.GetTextLen(idx) + 1;
               LPTSTR pstr = (LPTSTR) _alloca(len * sizeof(TCHAR));
               m_wndList.GetText(idx, pstr);
               SetWindowText(pstr);
               // Announce the new value
               ::SendMessage(GetParent(), WM_USER_PROP_UPDATEPROPERTY, 0, (LPARAM) m_hWnd);
            }
         }
         ::SetFocus(GetParent());
         break;
      case VK_ESCAPE:
         // Announce the cancellation
         ::SendMessage(GetParent(), WM_USER_PROP_CANCELPROPERTY, 0, (LPARAM) m_hWnd);
         ::SetFocus(GetParent());
         break;
      }
      bHandled = FALSE;
      return 0;
   }
   LRESULT OnLButtonUp(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/)
   {
      LRESULT lRes = m_wndList.DefWindowProc();
      // Selected an item? Fake RETURN key to copy new value...
      BOOL bDummy;
      OnKeyDown(WM_KEYDOWN, VK_RETURN, 0, bDummy);
      return lRes;
   }
   LRESULT OnKillFocus(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/)
   {
      LRESULT lRes = m_wndList.DefWindowProc();
      m_wndList.ShowWindow(SW_HIDE);
      return lRes;
   }

   // Ownerdrawn button message handler

   LRESULT OnDrawItem(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM lParam, BOOL& /*bHandled*/)
   {
      LPDRAWITEMSTRUCT lpdis = (LPDRAWITEMSTRUCT) lParam;
      if( m_wndButton != lpdis->hwndItem ) return 0;
      CDCHandle dc(lpdis->hDC);
      // Paint as dropdown button
      dc.DrawFrameControl(&lpdis->rcItem, DFC_SCROLL, (lpdis->itemState & ODS_SELECTED) ? DFCS_SCROLLDOWN | DFCS_PUSHED : DFCS_SCROLLDOWN);
      return 0;
   }
};


/////////////////////////////////////////////////////////////////////////////
// Editor with embedded ListBox control

class CPropertyComboWindow : 
   public CPropertyDropWindowImpl<CPropertyComboWindow, CStatic>
{
public:
   DECLARE_WND_SUPERCLASS(_T("WTL_InplacePropertyCombo"), CStatic::GetWndClassName())

   CContainedWindowT<CListBox> m_wndList;
   HWND m_hWndCombo;  // Listbox supplied by Property class
   int m_cyList;      // Used to resize the listbox when first shown

   typedef CPropertyDropWindowImpl<CPropertyComboWindow, CStatic> baseClass;

   CPropertyComboWindow() : 
      m_wndList(this, 2), 
      m_hWndCombo(NULL), 
      m_cyList(0)
   {
   }

   BEGIN_MSG_MAP(CPropertyComboWindow)
      MESSAGE_HANDLER(WM_CREATE, OnCreate)
      MESSAGE_HANDLER(WM_DESTROY, OnDestroy)
      MESSAGE_HANDLER(WM_PAINT, OnPaint)
      MESSAGE_HANDLER(WM_DRAWITEM, OnDrawItem)
      COMMAND_CODE_HANDLER(BN_CLICKED, OnButtonClicked)
      CHAIN_MSG_MAP( baseClass )
   ALT_MSG_MAP(1) // Button
      CHAIN_MSG_MAP_ALT( baseClass, 1 )
   ALT_MSG_MAP(2) // List
      MESSAGE_HANDLER(WM_LBUTTONUP, OnLButtonUp)
   END_MSG_MAP()

   LRESULT OnCreate(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& bHandled)
   {
      ATLASSERT(::IsWindow(m_hWndCombo));      
      m_wndList.SubclassWindow(m_hWndCombo);
      // Go create the rest of the control...
      bHandled = FALSE;
      return 0;
   }
   LRESULT OnDestroy(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& bHandled)
   {
      if( ::GetCapture() == m_wndList ) ::ReleaseCapture();
      if( m_wndList.IsWindow() ) m_wndList.UnsubclassWindow();
      if( ::IsWindowVisible(m_hWndCombo) ) ::ShowWindow(m_hWndCombo, SW_HIDE);
      bHandled = FALSE;
      return 0;
   }
   LRESULT OnPaint(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/)
   {
      CPaintDC dc( m_hWnd );      
      RECT rcButton;
      m_wndButton.GetWindowRect(&rcButton);
      RECT rcClient;
      GetClientRect(&rcClient);
      rcClient.right -= rcButton.right - rcButton.left;
      DRAWITEMSTRUCT dis = { 0 };
      dis.hDC = dc;
      dis.hwndItem = m_wndList;
      dis.CtlID = m_wndList.GetDlgCtrlID();
      dis.CtlType = ODT_LISTBOX;
      dis.rcItem = rcClient;
      dis.itemState = ODS_DEFAULT | ODS_COMBOBOXEDIT;
      dis.itemID = m_wndList.GetCurSel();
      dis.itemData = (int) m_wndList.GetItemData(dis.itemID);
      m_wndList.SendMessage(OCM_DRAWITEM, dis.CtlID, (LPARAM) &dis);
      return 0;
   }
   LRESULT OnButtonClicked(WORD /*wNotifyCode*/, WORD /*wID*/, HWND /*hWndCtl*/, BOOL& /*bHandled*/)
   {
      if( m_cyList == 0 ) {
         // Resize list to fit all items (but not more than 140 pixels)
         const int MAX_HEIGHT = 140;
         int cy = m_wndList.GetCount() * m_wndList.GetItemHeight(0);
         m_cyList = min( MAX_HEIGHT, cy + (::GetSystemMetrics(SM_CYBORDER)*2) );
      }
      // Move the dropdown under the item
      RECT rcWin;
      GetWindowRect(&rcWin);
      RECT rc = { rcWin.left, rcWin.bottom, rcWin.right, rcWin.bottom + m_cyList };
      m_wndList.SetWindowPos(HWND_TOPMOST, &rc, SWP_SHOWWINDOW);
      m_wndList.SetFocus();
      ::SetCapture(m_wndList);
      return 0;
   }

   // List message handlers

   LRESULT OnLButtonUp(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM lParam, BOOL& /*bHandled*/)
   {      
      LRESULT lRes = m_wndList.DefWindowProc();
      ::ReleaseCapture();
      m_wndList.ShowWindow(SW_HIDE);
      //
      POINT pt = { GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam) };
      BOOL bOutside = TRUE;
      int iSel = m_wndList.ItemFromPoint(pt, bOutside);
      if( !bOutside ) {
         m_wndList.SetCurSel(iSel);
         Invalidate();
         // Announce the new value
         ::PostMessage(GetParent(), WM_USER_PROP_UPDATEPROPERTY, 0, (LPARAM) m_hWnd);
      }
      return lRes;
   }

   // Ownerdrawn button message handler

   LRESULT OnDrawItem(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM lParam, BOOL& /*bHandled*/)
   {
      LPDRAWITEMSTRUCT lpdis = (LPDRAWITEMSTRUCT) lParam;
      if( m_wndButton != lpdis->hwndItem ) return 0;
      CDCHandle dc(lpdis->hDC);
      // Paint as dropdown button
      dc.DrawFrameControl(&lpdis->rcItem, DFC_SCROLL, (lpdis->itemState & ODS_SELECTED) ? DFCS_SCROLLDOWN | DFCS_PUSHED : DFCS_SCROLLDOWN);
      return 0;
   }
};


/////////////////////////////////////////////////////////////////////////////
// Editor with browse button

class CPropertyButtonWindow : 
   public CPropertyDropWindowImpl<CPropertyButtonWindow>
{
public:
   DECLARE_WND_SUPERCLASS(_T("WTL_InplacePropertyButton"), CEdit::GetWndClassName())

   IProperty* m_prop; // BUG: Dangerous reference

   typedef CPropertyDropWindowImpl<CPropertyButtonWindow> baseClass;

   BEGIN_MSG_MAP(CPropertyButtonWindow)
      COMMAND_CODE_HANDLER(BN_CLICKED, OnButtonClicked)
      MESSAGE_HANDLER(WM_DRAWITEM, OnDrawItem)
      CHAIN_MSG_MAP( baseClass )
   ALT_MSG_MAP(1) // Button
      CHAIN_MSG_MAP_ALT( baseClass, 1 )
   END_MSG_MAP()

   LRESULT OnButtonClicked(WORD /*wNotifyCode*/, WORD /*wID*/, HWND /*hWndCtl*/, BOOL& /*bHandled*/)
   {
      ATLASSERT(m_prop);
      // Call Property class' implementation of BROWSE action
      m_prop->Activate(PACT_BROWSE, 0);
      ::PostMessage(GetParent(), WM_USER_PROP_UPDATEPROPERTY, 0, (LPARAM) m_hWnd);
      return 0;
   }

   LRESULT OnDrawItem(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM lParam, BOOL& /*bHandled*/)
   {
      LPDRAWITEMSTRUCT lpdis = (LPDRAWITEMSTRUCT) lParam;
      if( m_wndButton != lpdis->hwndItem ) return 0;
      CDCHandle dc(lpdis->hDC);
      // Paint as ellipsis button
      dc.DrawFrameControl(&lpdis->rcItem, DFC_BUTTON, (lpdis->itemState & ODS_SELECTED) ? DFCS_BUTTONPUSH | DFCS_PUSHED : DFCS_BUTTONPUSH);
      dc.SetBkMode(TRANSPARENT);
      LPCTSTR pstrEllipsis = _T("...");
      dc.DrawText(pstrEllipsis, ::lstrlen(pstrEllipsis), &lpdis->rcItem, DT_CENTER | DT_EDITCONTROL | DT_SINGLELINE | DT_VCENTER);
      return 0;
   }
};


#endif // __PROPERTYITEMEDITORS__H