rtreview.cpp

cy7c68013目前最流行的几种gps芯片的控制定制程序的源代码

////////////////////////////////////////////////////////////////////////////////
// RTreView.cpp : implementation of the CRTreView class
// $Header: /USB/Util/EzMr/RTreView.cpp 3     8/08/00 2:26p Tpm $
// Copyright (c) 2000 Cypress Semiconductor. May not be reproduced without permission.
// See the EzUsb Developer's Kit license agreement for more details.
////////////////////////////////////////////////////////////////////////////////


#include "stdafx.h"
#include "EzMr.h"
#include "RTreDoc.h"
#include "RTreView.h"
//#include "ChooseLPARAMDialog.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

//////////
// CRTreView

IMPLEMENT_DYNCREATE(CRTreView, CTreeView)

BEGIN_MESSAGE_MAP(CRTreView, CTreeView)
   //{{AFX_MSG_MAP(CRTreView)
ON_WM_CREATE()
	ON_WM_RBUTTONDOWN()
	ON_WM_CONTEXTMENU()
	ON_WM_LBUTTONDOWN()
	ON_WM_RBUTTONUP()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()


//////////
// Constructor 
//
CRTreView::CRTreView()
: m_bShowHandlesAndLParams(FALSE)
{
	m_pOldSel = 0;
}


//////////
// Destructor 
//
CRTreView::~CRTreView()
{
}


//////////
// GetItemHandle() is a public member function which provides an operation
// which is not available in the TreeView control or any of the MFC tree
// classes (CTreeView, CTreeCtrl). It returns the HTREEITEM handle for
// the item you seek, when you provide the LPARAM value (TV_ITEM.lParam)
// which was specified for that item. A user specfied LPARAM value
// is often a pointer to the software representation of the visual element
// on a control window. The startHandle argument is an optional arguement
// which indicates that the search should begin at a specific "sub-root"
// in the tree control. If not specified by the user, the startHandle
// value will be TVI_ROOT which is treated by the control as a flag
// specifying the top-level item.
//
HTREEITEM CRTreView::GetItemHandle (LPARAM    lParam,
                                             HTREEITEM startHandle)
{
   ASSERT(lParam);

   SaveItemHandleUserParm_ userParm;
   userParm.m_lParam       = lParam;
   userParm.m_hTreeItem    = NULL;

   ApplyIfTrue_ ( CRTreView::ItemHasLparam_,
                  CRTreView::SaveItemHandle_,
                  reinterpret_cast<DWORD>( & userParm ),
                  startHandle);

   return userParm.m_hTreeItem;
}


//////////
// ApplyIfTrue() recurses the tree calling the predicate function for
// each item in the tree. If the predicate function returns TRUE,
// then the apply function is called. If the apply function returns
// TRUE, then the recursion continues. If the apply function returns
// FALSE, then the recursion ends.
//
BOOL CRTreView::ApplyIfTrue_ (TreePredicateFunction_ predicateFunction,
                                       TreeApplyFunction_     applyFunction,
                                       DWORD                  userParm,
                                       HTREEITEM              startHandle,
                                       BOOL                   recurseRootSiblings)
{
   // If startHandle is null, this is either a recursive base-case
   // indicating there are no more items below the current HTREEITEM,
   // or it indicates that the user called this function with a NULL
   // value as the start handle. The default value for startHandle is
   // TVI_ROOT whose value is considered by the TreeView control to
   // be a flag indicating the root item.

   if ( startHandle == NULL )
      return FALSE;

   // Get the starting location of the recursion.
   // The starting location defaults to the absolute root.

   HTREEITEM candidate;
   if ( startHandle == TVI_ROOT )
   {
      candidate = GetTreeCtrl().GetRootItem ();

      // If there are no items in the tree, then get out.

      if (candidate == NULL)
          return FALSE;
   }
   else
      candidate = startHandle;

   // Call the predicate function on the starting candidate.
   // If the predicate returns TRUE, then call the apply
   // function. If the apply function returns FALSE, it
   // indicates that no more calls to the apply function
   // should occur.

   if ( (this->*predicateFunction)(candidate, userParm ) == TRUE )
      if ( (this->*applyFunction)(candidate, userParm ) == FALSE )
          return FALSE;
      
   // Process each child of the candidate item. If that child
   // also has children, process each of those children.

   if ( GetTreeCtrl().ItemHasChildren( candidate ) )
   {
      // Get the first child's handle...

      HTREEITEM child = GetTreeCtrl().GetChildItem ( candidate );
      while (child)
      {
         // ... and recurse each child item.

         if ( ApplyIfTrue_
               (predicateFunction, applyFunction, userParm, child )
              == FALSE)
              return FALSE;

         // Get the next sibling of the child just recursed.

         child = GetTreeCtrl().GetNextSiblingItem ( child );
      }

      // Process siblings of the highest root

      if (recurseRootSiblings)
         candidate = GetTreeCtrl().GetNextSiblingItem(candidate);
      else
         candidate = NULL;
   }
   return TRUE;
}


//////////
// TruePredicate_() is a predicate function for use by ApplyIfTrue().
// It is used when an "apply" function is to be called for each item.
//
BOOL CRTreView::TruePredicate_(HTREEITEM candidate, DWORD userParm)
{
    ASSERT(candidate);

    return TRUE; // Call the apply function.
}


//////////
// ItemHasText_() is a predicate function for ApplyIfTrue_().
// It determines whether the item in the TreeView has text
// which equals some user specified value.
//
BOOL CRTreView::ItemHasText_(HTREEITEM candidate, DWORD userParm)
{
   ASSERT(candidate && userParm);

   return  (reinterpret_cast<SaveItemHandleUserParm_*>(userParm)->m_text ==
            GetTreeCtrl().GetItemText(candidate)) == 0;
}


//////////
// ItemHasLparam_() is a predicate function for ApplyIfTrue_().
// It determines whether the item in the TreeView has an LPARAM
// value which equals some user specified value.
//
BOOL CRTreView::ItemHasLparam_(HTREEITEM candidate, DWORD userParm)
{
   ASSERT(candidate && userParm);

   return reinterpret_cast<SaveItemHandleUserParm_*>(userParm)->m_lParam ==  
          LPARAM(GetTreeCtrl().GetItemData(candidate));
}


//////////
// SaveItemHandle_() is an apply function for ApplyIfTrue_().
// It saves the LPARAM for the candidate item in the user specified location. 
//
BOOL CRTreView::SaveItemHandle_(HTREEITEM candidate, DWORD userParm)
{
    ASSERT(candidate && userParm);

    reinterpret_cast<SaveItemHandleUserParm_*>(userParm)->m_hTreeItem
       = candidate;    
    return FALSE; // done
}


//////////
// SaveItemsLparams_() is an apply function for ApplyIfTrue_().
// It saves the LPARAM for the candidate item in the user specified array.
//
BOOL CRTreView::SaveItemsLParams_(HTREEITEM candidate, DWORD userParm)
{
   ASSERT(candidate && userParm);

   CDWordArray* arrayOfTreeViewLParams = 
                reinterpret_cast<CDWordArray*>(userParm);
   DWORD data = GetTreeCtrl().GetItemData(candidate);
   ASSERT(data);
   arrayOfTreeViewLParams->Add(data);
   return TRUE; // keep going...
}


//////////
// ShowHandleAndLParam() is an apply function for ApplyIfTrue_(). It shows
// the HTREEITEM handle and TVI_ITEM.lParam value for an item.
//
BOOL CRTreView::ShowHandleAndLParam_(HTREEITEM candidate, DWORD userParm) 
{
    TV_ITEM item;
    TCHAR pszText[255];
    item.mask = TVIF_HANDLE | TVIF_TEXT | TVIF_PARAM;
    item.cchTextMax = sizeof pszText;
    item.pszText = pszText;
    item.hItem = candidate;

    CString text;

    GetTreeCtrl().GetItem(&item);

    if (userParm == TRUE)
    {
        CString szTmp;
        CString fmt("HTREEITEM=%#8x");
        szTmp.Format(fmt, reinterpret_cast<int>(candidate));
        text = CString(item.pszText) + CString(" ") + szTmp;
        
        fmt = CString("LPARAM=%#8x");
        szTmp.Format(fmt, item.lParam);
        //szTmp.Format(fmt, reinterpret_cast<long>(item.lParam));
       text = text + CString(" ") + szTmp;
    }
    else
    {
        text = item.pszText;
        int offset = text.Find(_T(' '));
        ASSERT(offset != -1);
        text = text.Left( offset );
    }

    item.pszText = const_cast<TCHAR*>((LPCTSTR)text);

    GetTreeCtrl().SetItem(&item);
    
    return TRUE;
}


//////////
// CRTreCompare() is a global function which is called by the
// TreeView control when the user calls SortChildrenCB() and specifies
// this function as the value of LPTV_SORTCB.lpfnCompare.
//
int CALLBACK
CRTreViewCompare(LPARAM item1Param, LPARAM item2Param, LPARAM pThis)
{
   return (reinterpret_cast<CRTreView*>(pThis))->
                            SortCompare(item1Param, item2Param);
}


//////////
// SortCompare() is a virtual function which implements a compare
// of two items in the tree. Since TreeView items are most
// often sorted by the text associated with that item,