复选框的下拉列表.docx

复选框的下拉列表.docx

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复选框的下拉列表

用自定义的‍CCheckComboBox类做带复选框的下拉列表

1、添加ComboBox控件

2.、改属性Style：

DropList  ； OwnerDraw：

Fixed； Hasstring：

true；Sort：

false

3、头文件中添加：

     CCheckComboBoxm_comboBox;

4、DoDataExchange（CDataExchange*pDX）中添加：

    DDX_Control（pDX,IDC_COMBO1,m_comboBox）;

5、对话框初始化时添加

   m_comboBox.AddString（_T（"1"））;//加入项目

   m_comboBox.AddString（_T（"2"））;

   m_comboBox.AddString（_T（"3"））;

   m_comboBox.AddString（_T（"4"））;

   m_comboBox.SetCheck（0,TRUE）;//设置选择状态

   m_comboBox.SetCheck（1,FALSE）;

   m_comboBox.SetCheck（2,TRUE）;

   m_comboBox.SetCheck（3,TRUE）;

    ‍

‍‍

#if!

defined（AFX_CHECKCOMBOBOX_H__66750D93_95DB_11D3_9325_444553540000__INCLUDED_）

#defineAFX_CHECKCOMBOBOX_H__66750D93_95DB_11D3_9325_444553540000__INCLUDED_

#if_MSC_VER>1000

#pragmaonce

#endif//_MSC_VER>1000

classCCheckComboBox:

publicCComboBox

{

public:

CCheckComboBox（）;

virtual~CCheckComboBox（）;

BOOLCreate（DWORDdwStyle,constRECT&rect,CWnd*pParentWnd,UINTnID）;

//Selectsall/unselectsthespecifieditem

INTSetCheck（INTnIndex,BOOLbFlag）;

//Returnscheckedstate

BOOLGetCheck（INTnIndex）;

//Selectsall/unselectsall

voidSelectAll（BOOLbCheck=TRUE）;

protected:

//ClassWizardgeneratedvirtualfunctionoverrides

//{{AFX_VIRTUAL（CCheckComboBox）

protected:

virtualvoidDrawItem（LPDRAWITEMSTRUCTlpDrawItemStruct）;

virtualvoidMeasureItem（LPMEASUREITEMSTRUCTlpMeasureItemStruct）;

//}}AFX_VIRTUAL

//{{AFX_MSG（CCheckComboBox）

afx_msgLRESULTOnCtlColorListBox（WPARAMwParam,LPARAMlParam）;

afx_msgLRESULTOnGetText（WPARAMwParam,LPARAMlParam）;

afx_msgLRESULTOnGetTextLength（WPARAMwParam,LPARAMlParam）;

afx_msgvoidOnDropDown（）;

//}}AFX_MSG

DECLARE_MESSAGE_MAP（）

public:

  CStringm_strText;

protected:

//Routinetoupdatethetext

voidRecalcText（）;

//ThesubclassedCOMBOLBOXwindow（noticethe'L'）

HWNDm_hListBox;

//Thestringcontainingthetexttodisplay

BOOLm_bTextUpdated;

//AflagusedinMeasureItem,seecommentsthere

BOOLm_bItemHeightSet;

};

/////////////////////////////////////////////////////////////////////////////

//{{AFX_INSERT_LOCATION}}

//MicrosoftVisualC++willinsertadditionaldeclarationsimmediatelybeforethepreviousline.

#endif//!

defined（AFX_CHECKCOMBOBOX_H__66750D93_95DB_11D3_9325_444553540000__INCLUDED_）

/** CheckComboBox.cpp **/

//CheckComboBox.cpp

//

//WrittenbyMagnusEgelberg（magnus.egelberg@lundalogik.se）

//

//Copyright（C）1999,LundalogikAB,Sweden.Allrightsreserved.

//

//

#include"stdafx.h"

//#include"CheckCombo.h"

#include"CheckComboBox.h"

#ifdef_DEBUG

#definenewDEBUG_NEW

#undefTHIS_FILE

staticcharTHIS_FILE[]=__FILE__;

#endif

staticWNDPROCm_pWndProc=0;

staticCCheckComboBox*m_pComboBox=0;

BEGIN_MESSAGE_MAP（CCheckComboBox,CComboBox）

//{{AFX_MSG_MAP（CCheckComboBox）

ON_MESSAGE（WM_CTLCOLORLISTBOX,OnCtlColorListBox）

ON_MESSAGE（WM_GETTEXT,OnGetText）

ON_MESSAGE（WM_GETTEXTLENGTH,OnGetTextLength）

ON_CONTROL_REFLECT（CBN_DROPDOWN,OnDropDown）

//}}AFX_MSG_MAP

END_MESSAGE_MAP（）

//

//ThesubclassedCOMBOLBOXmessagehandler

//

extern"C"LRESULTFARPASCALComboBoxListBoxProc（HWNDhWnd,UINTnMsg,WPARAMwParam,LPARAMlParam）

{

switch（nMsg）{

  caseWM_RBUTTONDOWN:

{

   //Ifyouwanttoselectall/unselectallusingthe

   //rightbutton,removethisifdef.Personally,Idon'treallylikeit

   #ifFALSE

    if（m_pComboBox!

=0）{

     INTnCount=m_pComboBox->GetCount（）;

     INTnSelCount=0;

     for（INTi=0;i

      if（m_pComboBox->GetCheck（i））

       nSelCount++;

     }

     m_pComboBox->SelectAll（nSelCount!

=nCount）;

     //Makesuretoinvalidatethiswindowaswell

     InvalidateRect（hWnd,0,FALSE）;

     m_pComboBox->GetParent（）->SendMessage（WM_COMMAND,MAKELONG（GetWindowLong（m_pComboBox->m_hWnd,GWL_ID）,CBN_SELCHANGE）,（LPARAM）m_pComboBox->m_hWnd）;

    }

   #endif

   break;

  }

  //Makethecomboboxalwaysreturn-1asthecurrentselection.This

  //causesthelpDrawItemStruct->itemIDinDrawItem（）tobe-1

  //whenthealways-visible-portionofthecomboisdrawn

  caseLB_GETCURSEL:

{

   return-1;

  }

  caseWM_CHAR:

{

   if（wParam==VK_SPACE）{

    //Getthecurrentselection

    INTnIndex=CallWindowProcA（m_pWndProc,hWnd,LB_GETCURSEL,wParam,lParam）;

    CRectrcItem;

    SendMessage（hWnd,LB_GETITEMRECT,nIndex,（LONG）（VOID*）&rcItem）;

    InvalidateRect（hWnd,rcItem,FALSE）;

    //Invertthecheckmark

    m_pComboBox->SetCheck（nIndex,!

m_pComboBox->GetCheck（nIndex））;

    //Notifythatselectionhaschanged

    m_pComboBox->GetParent（）->SendMessage（WM_COMMAND,MAKELONG（GetWindowLong（m_pComboBox->m_hWnd,GWL_ID）,CBN_SELCHANGE）,（LPARAM）m_pComboBox->m_hWnd）;

    return0;

   }

   break;

  }

  caseWM_LBUTTONDOWN:

{

   CRectrcClient;

   GetClientRect（hWnd,rcClient）;

   CPointpt;

   pt.x=LOWORD（lParam）;

   pt.y=HIWORD（lParam）;

   if（PtInRect（rcClient,pt））{

    INTnItemHeight=SendMessage（hWnd,LB_GETITEMHEIGHT,0,0）;

    INTnTopIndex  =SendMessage（hWnd,LB_GETTOPINDEX,0,0）;

    //Computewhichindextocheck/uncheck

    INTnIndex=nTopIndex+pt.y/nItemHeight;

    CRectrcItem;

    SendMessage（hWnd,LB_GETITEMRECT,nIndex,（LONG）（VOID*）&rcItem）;

    if（PtInRect（rcItem,pt））{

     //Invalidatethiswindow

     InvalidateRect（hWnd,rcItem,FALSE）;

     m_pComboBox->SetCheck（nIndex,!

m_pComboBox->GetCheck（nIndex））;

     //Notifythatselectionhaschanged

     m_pComboBox->GetParent（）->SendMessage（WM_COMMAND,MAKELONG（GetWindowLong（m_pComboBox->m_hWnd,GWL_ID）,CBN_SELCHANGE）,（LPARAM）m_pComboBox->m_hWnd）;

    }

   }

   //Dothedefaulthandlingnow（suchasclosethepopup

   //windowwhenclickedoutside）

   break;

  }

  caseWM_LBUTTONUP:

{

   //Don'tdoanythinghere.Thiscausesthecomboboxpopup

   //windowstoremainopenafteraselectionhasbeenmade

   return0;

  }

}

returnCallWindowProc（m_pWndProc,hWnd,nMsg,wParam,lParam）;

}

CCheckComboBox:

:

CCheckComboBox（）

{

m_hListBox      =0;

m_bTextUpdated  =FALSE;

m_bItemHeightSet=FALSE;

}

CCheckComboBox:

:

~CCheckComboBox（）

{

}

BOOLCCheckComboBox:

:

Create（DWORDdwStyle,constRECT&rect,CWnd*pParentWnd,UINTnID）

{

//RemovetheCBS_SIMPLEandCBS_DROPDOWNstylesandaddtheoneI'mdesignedfor

dwStyle&=~0xF;

dwStyle|=CBS_DROPDOWNLIST;

//MakesuretousetheCBS_OWNERDRAWVARIABLEstyle

dwStyle|=CBS_OWNERDRAWVARIABLE;

//Usedefaultstrings.Weneedtheitemdatatostorecheckmarks

dwStyle|=CBS_HASSTRINGS;

returnCComboBox:

:

Create（dwStyle,rect,pParentWnd,nID）;

}

LRESULTCCheckComboBox:

:

OnCtlColorListBox（WPARAMwParam,LPARAMlParam）

{

//Ifthelistboxhasn'tbeensubclassedyet,doso...

if（m_hListBox==0）{

  HWNDhWnd=（HWND）lParam;

  if（hWnd!

=0&&hWnd!

=m_hWnd）{

   //Savethelistboxhandle

   m_hListBox=hWnd;

   //Dothesubclassing

   m_pWndProc=（WNDPROC）GetWindowLong（m_hListBox,GWL_WNDPROC）;

   SetWindowLong（m_hListBox,GWL_WNDPROC,（LONG）ComboBoxListBoxProc）;

  }

}

returnDefWindowProc（WM_CTLCOLORLISTBOX,wParam,lParam）;

}

voidCCheckComboBox:

:

DrawItem（LPDRAWITEMSTRUCTlpDrawItemStruct）

{

HDCdc=lpDrawItemStruct->hDC;

CRectrcBitmap=lpDrawItemStruct->rcItem;

CRectrcText  =lpDrawItemStruct->rcItem;

CStringstrText;

//0-Nocheck,1-Emptycheck,2-Checked

INTnCheck=0;

//Checkifwearedrawingthestaticportionofthecombobox

if（（LONG）lpDrawItemStruct->itemID<0）{

  //Makesurethem_strTextmemberisupdated

  RecalcText（）;

  //Getthetext

  strText=m_strText;

  //Don'tdrawanyboxesonthisitem

  nCheck=0;

}

//Otherwiseitisoneoftheitems

else{

  GetLBText（lpDrawItemStruct->itemID,strText）;

  nCheck=1+（GetItemData（lpDrawItemStruct->itemID）!

=0）;

  TEXTMETRICmetrics;

  GetTextMetrics（dc,&metrics）;

  rcBitmap.left   =0;

  rcBitmap.right  =rcBitmap.left+metrics.tmHeight+metrics.tmExternalLeading+6;

  rcBitmap.top   +=1;

  rcBitmap.bottom-=1;

  rcText.left=rcBitmap.right;

}

if（nCheck>0）{

  SetBkColor（dc,GetSysColor（COLOR_WINDOW））;

  SetTextColor（dc,GetSysColor（COLOR_WINDOWTEXT））;

  UINTnState=DFCS_BUTTONCHECK;

  if（nCheck>1）

   nState|=DFCS_CHECKED;

  //DrawthecheckmarkusingDrawFrameControl

  DrawFrameControl（dc,rcBitmap,DFC_BUTTON,nState）;

}

if（lpDrawItemStruct->itemState&ODS_SELECTED）{

  SetBkColor（dc,GetSysColor（COLOR_HIGHLIGHT））;

  SetTextColor（dc,GetSysColor（COLOR_HIGHLIGHTTEXT））;

}

else{

  SetBkColor（dc,GetSysColor（COLOR_WINDOW））;

  SetTextColor（dc,GetSysColor（COLOR_WINDOWTEXT））;

}

//Eraseanddraw

ExtTextOut（dc,0,0,ETO_OPAQUE,&rcText,0,0,0）;

DrawText（dc,''+strText,strText.GetLength（）+1,&rcText,DT_SINGLELINE|DT_VCENTER|DT_END_ELLIPSIS）;

if（（lpDrawItemStruct->itemState&（ODS_FOCUS|ODS_SELECTED））==（ODS_FOCUS|ODS_SELECTED））

  DrawFocusRect（dc,&rcText）;

}

voidCCheckComboBox:

:

MeasureItem（LPMEASUREITEMSTRUCTlpMeasureItemStruct）

{

CClientDCdc（this）;

CFont*pFont=dc.SelectObject（GetFont（））;

if（pFont!

=0）{

  TEXTMETRICmetrics;

  dc.GetTextMetrics（&metrics）;

  lpMeasureItemStruct->itemHeight=metrics.tmHeight+metrics.tmExternalLeading;

  //Anextraheightof2looksgoodIthink.

  //Otherwisethelistlooksabitcrowded...

  lpMeasureItemStruct->itemHeight+=2;

  //ThisisneededsincetheWM_MEASUREITEMmessageissentbefore

  //MFChookseverythingupifusedinidialog.Soadjustthe

  //staticportionofthecomboboxnow

  if（!

m_bItemHeightSet）{

   m_bItemHeightSet=TRUE;

   SetItemHeight（-1,lpMeasureItemStruct->itemHeight）;

  }

  dc.SelectObject（pFont）;

}

}

//

//Makesurethecomboboxwin