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//头文件
///////////////////////////////////////////////////////////////////////////////
//
// CTreeCtrlEx - Multiple selection tree control for MFC
//
// Bendik Engebretsen (c) 1997-1999
// bendik@techsoft.no
// http://www.techsoft.no/bendik/
//
//
#ifndef __TREECTRLEX_H
#define __TREECTRLEX_H
#define TVGN_EX_ALL 0x000F
/////////////////////////////////////////////////////////////////////////////
// CTreeCtrlEx window
class CTreeCtrlEx : public CTreeCtrl
{
DECLARE_DYNAMIC(CTreeCtrlEx)
// Construction
public:
CTreeCtrlEx() : m_bSelectPending(FALSE), m_hClickedItem(NULL), m_hFirstSelectedItem(NULL), m_bSelectionComplete(TRUE), m_bEditLabelPending(FALSE) {}
BOOL Create(DWORD dwStyle, DWORD dwExStyle, const RECT& rect, CWnd* pParentWnd, UINT nID);
BOOL Create(DWORD dwStyle, const RECT& rect, CWnd* pParentWnd, UINT nID);
// Attributes
public:
UINT GetSelectedCount() const;
HTREEITEM GetNextItem(HTREEITEM hItem, UINT nCode);
HTREEITEM GetFirstSelectedItem();
HTREEITEM GetNextSelectedItem(HTREEITEM hItem);
HTREEITEM GetPrevSelectedItem(HTREEITEM hItem);
HTREEITEM ItemFromData(DWORD dwData, HTREEITEM hStartAtItem=NULL) const;
BOOL SelectItemEx(HTREEITEM hItem, BOOL bSelect=TRUE);
BOOL SelectItems(HTREEITEM hFromItem, HTREEITEM hToItem);
void ClearSelection(BOOL bMultiOnly=FALSE);
protected:
void SelectMultiple( HTREEITEM hClickedItem, UINT nFlags, CPoint point );
private:
BOOL m_bSelectPending;
CPoint m_ptClick;
HTREEITEM m_hClickedItem;
HTREEITEM m_hFirstSelectedItem;
BOOL m_bSelectionComplete;
BOOL m_bEditLabelPending;
UINT m_idTimer;
// Operations
public:
// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CTreeCtrlEx)
//}}AFX_VIRTUAL
// Implementation
public:
virtual ~CTreeCtrlEx() {}
// Generated message map functions
protected:
//{{AFX_MSG(CTreeCtrlEx)
afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
afx_msg void OnLButtonUp(UINT nFlags, CPoint point);
afx_msg void OnMouseMove(UINT nFlags, CPoint point);
afx_msg void OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags);
afx_msg BOOL OnItemexpanding(NMHDR* pNMHDR, LRESULT* pResult);
afx_msg BOOL OnSetfocus(NMHDR* pNMHDR, LRESULT* pResult);
afx_msg BOOL OnKillfocus(NMHDR* pNMHDR, LRESULT* pResult);
afx_msg void OnRButtonDown(UINT nFlags, CPoint point);
afx_msg BOOL OnSelchanged(NMHDR* pNMHDR, LRESULT* pResult);
afx_msg void OnLButtonDblClk(UINT nFlags, CPoint point);
afx_msg void OnTimer(UINT nIDEvent);
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};
HTREEITEM GetTreeItemFromData(CTreeCtrl& treeCtrl, DWORD dwData, HTREEITEM hStartAtItem=NULL);
#endif
//实现文件
///////////////////////////////////////////////////////////////////////////////
//
// CTreeCtrlEx - Multiple selection tree control for MFC
//
// Copyright ?1997-2003 Bendik Engebretsen
// bendik@techsoft.no
// http://www.techsoft.no/bendik/
//
// Oct 9, 1997 : Fixed problem with notification to parent (TVN_BEGINDRAG)
// Oct 17, 1997 : Fixed bug with deselection when collapsing node with no sibling
// Nov 5, 1997 : Fixed problem with label editing
// Feb 17, 1998 : Fixed another notfication to parent (TVN_KEYDOWN)
// Apr 27, 1998 : Added TVN_SELCHANGED notification to parent in SelectMultiple()
// Dec 21, 1998 : Fixed incorrect use of LVHT_... constants. Now using TVHT_...
// Mar 15, 1999 : Fixed problems when there is no selected item.
// Fixed new problem with label editing
// Apr 16, 1999 : Fixed problem with double TVN_SELCHANGED notifications
// Many thanx to Roel Schroeven for providing the solution!!
// Jul 2, 1999 : Added TVN_SELCHANGING notification when selecting/deselecting
// selected item
// Oct 11, 1999 : Fixed quirks with Shift+Arrow Key selection. Thanx to Yariv Elani !
// Also changed behaviour of Ctrl+Mouse click selection: The item is
// unselected, but NOT 'focused' (i.e. same behaviour as a listctrl).
// Nov 16, 1999 : Fixed another quirk with Ctrl+Mouse click selection. Thanks to
// Yariv Ben-Tovim!
// May 21, 2001 : Now supports Shift PgUp and PgDn selection. Thanks to Sergei
// Antonov. Also fixed the too early TVN_SELCHANGED when key-selecting.
// May 31, 2001 : Fixed bug with uninitialized m_ptClick in OnLButtonDown. Thanks to
// Cristian Rodriguez!
// Jun 20, 2001 : Fixed quirk with label editing/doubleclick. Once more, thanks
// to Cristian Rodriguez. Also added treectrl wndclass registration.
// Jan 24, 2003 : Fixed bug when treeview has the TVS_DISABLEDRAGDROP style. Thanks to
// Fernanda Diniz Tavarez
// Mar 20, 2003 : Fixed 'blinking' problem with TVS_SINGLEEXPAND style. Thanks to
// H.-Joachim Riedel.
// Jun 10, 2003 : Migrated to Visual C++.NET / MFC 7.X
#include "stdafx.h"
#include "TreeCtrlEx.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
#define TCEX_EDITLABEL 1 // Edit label timer event
/////////////////////////////////////////////////////////////////////////////
// CTreeCtrlEx
BEGIN_MESSAGE_MAP(CTreeCtrlEx, CTreeCtrl)
//{{AFX_MSG_MAP(CTreeCtrlEx)
ON_WM_LBUTTONDOWN()
ON_WM_LBUTTONUP()
ON_WM_MOUSEMOVE()
ON_WM_KEYDOWN()
ON_NOTIFY_REFLECT_EX(TVN_ITEMEXPANDING, OnItemexpanding)
ON_NOTIFY_REFLECT_EX(NM_SETFOCUS, OnSetfocus)
ON_NOTIFY_REFLECT_EX(NM_KILLFOCUS, OnKillfocus)
ON_NOTIFY_REFLECT_EX(TVN_SELCHANGED, OnSelchanged)
ON_WM_RBUTTONDOWN()
ON_WM_LBUTTONDBLCLK()
ON_WM_TIMER()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
IMPLEMENT_DYNAMIC(CTreeCtrlEx, CTreeCtrl)
BOOL CTreeCtrlEx::Create(DWORD dwStyle, DWORD dwExStyle, const RECT& rect, CWnd* pParentWnd, UINT nID)
{
#if _MFC_VER < 0x0700
return CreateEx( dwExStyle, WC_TREEVIEW, NULL, dwStyle,
rect.left, rect.top, rect.right-rect.left, rect.bottom-rect.top,
pParentWnd->GetSafeHwnd(), (HMENU)nID );
#else
return CTreeCtrl::CreateEx( dwExStyle, dwStyle, rect, pParentWnd, nID );
#endif
}
BOOL CTreeCtrlEx::Create(DWORD dwStyle, const RECT& rect, CWnd* pParentWnd, UINT nID)
{
return CTreeCtrl::Create(dwStyle, rect, pParentWnd, nID);
}
/////////////////////////////////////////////////////////////////////////////
// CTreeCtrlEx message handlers
///////////////////////////////////////////////////////////////////////////////
// The tree control dosn't support multiple selection. However we can simulate
// it by taking control of the left mouse click and arrow key press before the
// control gets them, and setting/clearing the TVIS_SELECTED style on the items
void CTreeCtrlEx::OnLButtonDown( UINT nFlags, CPoint point )
{
UINT nHitFlags = 0;
HTREEITEM hClickedItem = HitTest( point, &nHitFlags );
// Must invoke label editing explicitly. The base class OnLButtonDown would normally
// do this, but we can't call it here because of the multiple selection...
if( !( nFlags&( MK_CONTROL|MK_SHIFT ) ) && ( GetStyle() & TVS_EDITLABELS ) && ( nHitFlags & TVHT_ONITEMLABEL ) )
if ( hClickedItem == GetSelectedItem() )
{
// Clear multple selection before label editing
ClearSelection();
SelectItem( hClickedItem );
// Invoke label editing
m_bEditLabelPending = TRUE;
m_idTimer = SetTimer(TCEX_EDITLABEL, GetDoubleClickTime(), NULL);
return;
}
m_bEditLabelPending = FALSE;
if( nHitFlags & TVHT_ONITEM )
{
SetFocus();
m_hClickedItem = hClickedItem;
// Is the clicked item already selected ?
BOOL bIsClickedItemSelected = GetItemState( hClickedItem, TVIS_SELECTED ) & TVIS_SELECTED;
if ( bIsClickedItemSelected )
{
// Maybe user wants to drag/drop multiple items!
// So, wait until OnLButtonUp() to do the selection stuff.
m_bSelectPending=TRUE;
}
else
{
SelectMultiple( hClickedItem, nFlags, point );
m_bSelectPending=FALSE;
}
m_ptClick=point;
}
else
CTreeCtrl::OnLButtonDown( nFlags, point );
}
void CTreeCtrlEx::OnLButtonUp( UINT nFlags, CPoint point )
{
if ( m_bSelectPending )
{
// A select has been waiting to be performed here
SelectMultiple( m_hClickedItem, nFlags, point );
m_bSelectPending=FALSE;
}
m_hClickedItem=NULL;
CTreeCtrl::OnLButtonUp( nFlags, point );
}
void CTreeCtrlEx::OnMouseMove( UINT nFlags, CPoint point )
{
// If there is a select pending, check if cursor has moved so much away from the
// down-click point that we should cancel the pending select and initiate
// a drag/drop operation instead!
if ( m_hClickedItem )
{
CSize sizeMoved = m_ptClick-point;
if ( abs(sizeMoved.cx) > GetSystemMetrics( SM_CXDRAG ) || abs(sizeMoved.cy) > GetSystemMetrics( SM_CYDRAG ) )
{
m_bSelectPending=FALSE;
// Notify parent that he may begin drag operation
// Since we have taken over OnLButtonDown(), the default handler doesn't
// do the normal work when clicking an item, so we must provide our own
// TVN_BEGINDRAG notification for the parent!
CWnd* pWnd = GetParent();
if ( pWnd && !( GetStyle() & TVS_DISABLEDRAGDROP ) )
{
NM_TREEVIEW tv;
tv.hdr.hwndFrom = GetSafeHwnd();
tv.hdr.idFrom = GetWindowLong( GetSafeHwnd(), GWL_ID );
tv.hdr.code = TVN_BEGINDRAG;
tv.itemNew.hItem = m_hClickedItem;
tv.itemNew.state = GetItemState( m_hClickedItem, 0xffffffff );
tv.itemNew.lParam = GetItemData( m_hClickedItem );
tv.ptDrag.x = point.x;
tv.ptDrag.y = point.y;
pWnd->SendMessage( WM_NOTIFY, tv.hdr.idFrom, (LPARAM)&tv );
}
m_hClickedItem=NULL;
}
}
CTreeCtrl::OnMouseMove( nFlags, point );
}
void CTreeCtrlEx::SelectMultiple( HTREEITEM hClickedItem, UINT nFlags, CPoint point )
{
// Start preparing an NM_TREEVIEW struct to send a notification after selection is done
NM_TREEVIEW tv;
memset(&tv.itemOld, 0, sizeof(tv.itemOld));
CWnd* pWnd = GetParent();
HTREEITEM hOldItem = GetSelectedItem();
if ( hOldItem )
{
tv.itemOld.hItem = hOldItem;
tv.itemOld.state = GetItemState( hOldItem, 0xffffffff );
tv.itemOld.lParam = GetItemData( hOldItem );
tv.itemOld.mask = TVIF_HANDLE|TVIF_STATE|TVIF_PARAM;
}
// Flag signaling that selection process is NOT complete.
// (Will prohibit TVN_SELCHANGED from being sent to parent)
m_bSelectionComplete = FALSE;
// Action depends on whether the user holds down the Shift or Ctrl key
if ( nFlags & MK_SHIFT )
{
// Select from first selected item to the clicked item
if ( !m_hFirstSelectedItem )
m_hFirstSelectedItem = GetSelectedItem();
SelectItems( m_hFirstSelectedItem, hClickedItem );
}
else if ( nFlags & MK_CONTROL )
{
// Find which item is currently selected
HTREEITEM hSelectedItem = GetSelectedItem();
// Is the clicked item already selected ?
BOOL bIsClickedItemSelected = GetItemState( hClickedItem, TVIS_SELECTED ) & TVIS_SELECTED;
BOOL bIsSelectedItemSelected = FALSE;
if ( hSelectedItem )
bIsSelectedItemSelected = GetItemState( hSelectedItem, TVIS_SELECTED ) & TVIS_SELECTED;
// Must synthesize a TVN_SELCHANGING notification
if ( pWnd )
{
tv.hdr.hwndFrom = GetSafeHwnd();
tv.hdr.idFrom = GetWindowLong( GetSafeHwnd(), GWL_ID );
tv.hdr.code = TVN_SELCHANGING;
tv.itemNew.hItem = hClickedItem;
tv.itemNew.state = GetItemState( hClickedItem, 0xffffffff );
tv.itemNew.lParam = GetItemData( hClickedItem );
tv.itemOld.hItem = NULL;
tv.itemOld.mask = 0;
tv.action = TVC_BYMOUSE;
tv.ptDrag.x = point.x;
tv.ptDrag.y = point.y;
pWnd->SendMessage( WM_NOTIFY, tv.hdr.idFrom, (LPARAM)&tv );
}
// If the previously selected item was selected, re-select it
if ( bIsSelectedItemSelected )
SetItemState( hSelectedItem, TVIS_SELECTED, TVIS_SELECTED );
// We want the newly selected item to toggle its selected state,
// so unselect now if it was already selected before
if ( bIsClickedItemSelected )
SetItemState( hClickedItem, 0, TVIS_SELECTED );
else
{
SelectItem(hClickedItem);
SetItemState( hClickedItem, TVIS_SELECTED, TVIS_SELECTED );
}
// If the previously selected item was selected, re-select it
if ( bIsSelectedItemSelected && hSelectedItem != hClickedItem )
SetItemState( hSelectedItem, TVIS_SELECTED, TVIS_SELECTED );
// Store as first selected item (if not already stored)
if ( m_hFirstSelectedItem==NULL )
m_hFirstSelectedItem = hClickedItem;
}
else
{
// Clear selection of all "multiple selected" items first
ClearSelection();
// Then select the clicked item
SelectItem( hClickedItem );
SetItemState( hClickedItem, TVIS_SELECTED, TVIS_SELECTED );
// Store as first selected item
m_hFirstSelectedItem = hClickedItem;
}
// Selection process is now complete. Since we have 'eaten' the TVN_SELCHANGED
// notification provided by Windows' treectrl, we must now produce one ourselves,
// so that our parent gets to know about the change of selection.
m_bSelectionComplete = TRUE;
if ( pWnd )
{
tv.hdr.hwndFrom = GetSafeHwnd();
tv.hdr.idFrom = GetWindowLong( GetSafeHwnd(), GWL_ID );
tv.hdr.code = TVN_SELCHANGED;
tv.itemNew.hItem = m_hClickedItem;
tv.itemNew.state = GetItemState( m_hClickedItem, 0xffffffff );
tv.itemNew.lParam = GetItemData( m_hClickedItem );
tv.itemNew.mask = TVIF_HANDLE|TVIF_STATE|TVIF_PARAM;
tv.action = TVC_UNKNOWN;
pWnd->SendMessage( WM_NOTIFY, tv.hdr.idFrom, (LPARAM)&tv );
}
}
void CTreeCtrlEx::OnKeyDown( UINT nChar, UINT nRepCnt, UINT nFlags )
{
CWnd* pWnd = GetParent();
if ( nChar==VK_NEXT || nChar==VK_PRIOR )
{
if ( !( GetKeyState( VK_SHIFT )&0x8000 ) )
{
// User pressed Pg key without holding 'Shift':
// Clear multiple selection (if multiple) and let base class do
// normal selection work!
if ( GetSelectedCount()>1 )
ClearSelection( TRUE );
CTreeCtrl::OnKeyDown( nChar, nRepCnt, nFlags );
m_hFirstSelectedItem = GetSelectedItem();
return;
}
// Flag signaling that selection process is NOT complete.
// (Will prohibit TVN_SELCHANGED from being sent to parent)
m_bSelectionComplete = FALSE;
// Let base class select the item
CTreeCtrl::OnKeyDown( nChar, nRepCnt, nFlags );
HTREEITEM hSelectedItem = GetSelectedItem();
// Then select items in between
SelectItems( m_hFirstSelectedItem, hSelectedItem );
// Selection process is now complete. Since we have 'eaten' the TVN_SELCHANGED
// notification provided by Windows' treectrl, we must now produce one ourselves,
// so that our parent gets to know about the change of selection.
m_bSelectionComplete = TRUE;
if (pWnd)
{
NM_TREEVIEW tv;
memset(&tv.itemOld, 0, sizeof(tv.itemOld));
tv.hdr.hwndFrom = GetSafeHwnd();
tv.hdr.idFrom = GetWindowLong(GetSafeHwnd(), GWL_ID);
tv.hdr.code = TVN_SELCHANGED;
tv.itemNew.hItem = hSelectedItem;
tv.itemNew.state = GetItemState(hSelectedItem, 0xffffffff);
tv.itemNew.lParam = GetItemData(hSelectedItem);
tv.itemNew.mask = TVIF_HANDLE|TVIF_STATE|TVIF_PARAM;
tv.action = TVC_UNKNOWN;
pWnd->SendMessage(WM_NOTIFY, tv.hdr.idFrom, (LPARAM)&tv);
}
}
else if ( nChar==VK_UP || nChar==VK_DOWN )
{
// Find which item is currently selected
HTREEITEM hSelectedItem = GetSelectedItem();
HTREEITEM hNextItem;
if ( nChar==VK_UP )
hNextItem = GetPrevVisibleItem( hSelectedItem );
else
hNextItem = GetNextVisibleItem( hSelectedItem );
if ( !( GetKeyState( VK_SHIFT )&0x8000 ) )
{
// User pressed arrow key without holding 'Shift':
// Clear multiple selection (if multiple) and let base class do
// normal selection work!
if ( GetSelectedCount()>1 )
ClearSelection( TRUE );
if ( hNextItem )
CTreeCtrl::OnKeyDown( nChar, nRepCnt, nFlags );
m_hFirstSelectedItem = GetSelectedItem();
return;
}
if ( hNextItem )
{
// Flag signaling that selection process is NOT complete.
// (Will prohibit TVN_SELCHANGED from being sent to parent)
m_bSelectionComplete = FALSE;
// If the next item is already selected, we assume user is
// "moving back" in the selection, and thus we should clear
// selection on the previous one
BOOL bSelect = !( GetItemState( hNextItem, TVIS_SELECTED ) & TVIS_SELECTED );
// Select the next item (this will also deselect the previous one!)
SelectItem( hNextItem );
// Now, re-select the previously selected item
if ( bSelect || ( !( GetItemState( hSelectedItem, TVIS_SELECTED ) & TVIS_SELECTED ) ) )
SelectItems( m_hFirstSelectedItem, hNextItem );
// Selection process is now complete. Since we have 'eaten' the TVN_SELCHANGED
// notification provided by Windows' treectrl, we must now produce one ourselves,
// so that our parent gets to know about the change of selection.
m_bSelectionComplete = TRUE;
if (pWnd)
{
NM_TREEVIEW tv;
memset(&tv.itemOld, 0, sizeof(tv.itemOld));
tv.hdr.hwndFrom = GetSafeHwnd();
tv.hdr.idFrom = GetWindowLong(GetSafeHwnd(), GWL_ID);
tv.hdr.code = TVN_SELCHANGED;
tv.itemNew.hItem = hNextItem;
tv.itemNew.state = GetItemState(hNextItem, 0xffffffff);
tv.itemNew.lParam = GetItemData(hNextItem);
tv.itemNew.mask = TVIF_HANDLE|TVIF_STATE|TVIF_PARAM;
tv.action = TVC_UNKNOWN;
pWnd->SendMessage(WM_NOTIFY, tv.hdr.idFrom, (LPARAM)&tv);
}
}
// Since the base class' OnKeyDown() isn't called in this case,
// we must provide our own TVN_KEYDOWN notification to the parent
CWnd* pWnd = GetParent();
if ( pWnd )
{
NMTVKEYDOWN tvk;
tvk.hdr.hwndFrom = GetSafeHwnd();
tvk.hdr.idFrom = GetWindowLong( GetSafeHwnd(), GWL_ID );
tvk.hdr.code = TVN_KEYDOWN;
tvk.wVKey = nChar;
tvk.flags = 0;
pWnd->SendMessage( WM_NOTIFY, tvk.hdr.idFrom, (LPARAM)&tvk );
}
}
else
// Behave normally
CTreeCtrl::OnKeyDown( nChar, nRepCnt, nFlags );
}
///////////////////////////////////////////////////////////////////////////////
// I want clicking on an item with the right mouse button to select the item,
// but not if there is currently a multiple selection
void CTreeCtrlEx::OnRButtonDown( UINT nFlags, CPoint point )
{
UINT nHitFlags = 0;
HTREEITEM hClickedItem = HitTest( point, &nHitFlags );
if( nHitFlags&TVHT_ONITEM )
if ( GetSelectedCount()<2 )
SelectItem( hClickedItem );
CTreeCtrl::OnRButtonDown( nFlags, point );
}
///////////////////////////////////////////////////////////////////////////////
// Get number of selected items
UINT CTreeCtrlEx::GetSelectedCount() const
{
// Only visible items should be selected!
UINT uCount=0;
for ( HTREEITEM hItem = GetRootItem(); hItem!=NULL; hItem = GetNextVisibleItem( hItem ) )
if ( GetItemState( hItem, TVIS_SELECTED ) & TVIS_SELECTED )
uCount++;
return uCount;
}
///////////////////////////////////////////////////////////////////////////////
// Overloaded to catch our own special code
HTREEITEM CTreeCtrlEx::GetNextItem(HTREEITEM hItem, UINT nCode)
{
if (nCode==TVGN_EX_ALL)
{
// This special code lets us iterate through ALL tree items regardless
// of their parent/child relationship (very handy)
HTREEITEM hNextItem;
// If it has a child node, this will be the next item
hNextItem = GetChildItem( hItem );
if (hNextItem)
return hNextItem;
// Otherwise, see if it has a next sibling item
hNextItem = GetNextSiblingItem(hItem);
if (hNextItem)
return hNextItem;
// Finally, look for next sibling to the parent item
HTREEITEM hParentItem=hItem;
while (!hNextItem && hParentItem)
{
// No more children: Get next sibling to parent
hParentItem = GetParentItem(hParentItem);
hNextItem = GetNextSiblingItem(hParentItem);
}
return hNextItem; // will return NULL if no more parents
}
else
return CTreeCtrl::GetNextItem(hItem, nCode); // standard processing
}
///////////////////////////////////////////////////////////////////////////////
// Helpers to list out selected items. (Use similar to GetFirstVisibleItem(),
// GetNextVisibleItem() and GetPrevVisibleItem()!)
HTREEITEM CTreeCtrlEx::GetFirstSelectedItem()
{
for ( HTREEITEM hItem = GetRootItem(); hItem!=NULL; hItem = GetNextVisibleItem( hItem ) )
if ( GetItemState( hItem, TVIS_SELECTED ) & TVIS_SELECTED )
return hItem;
return NULL;
}
HTREEITEM CTreeCtrlEx::GetNextSelectedItem( HTREEITEM hItem )
{
for ( hItem = GetNextVisibleItem( hItem ); hItem!=NULL; hItem = GetNextVisibleItem( hItem ) )
if ( GetItemState( hItem, TVIS_SELECTED ) & TVIS_SELECTED )
return hItem;
return NULL;
}
HTREEITEM CTreeCtrlEx::GetPrevSelectedItem( HTREEITEM hItem )
{
for ( hItem = GetPrevVisibleItem( hItem ); hItem!=NULL; hItem = GetPrevVisibleItem( hItem ) )
if ( GetItemState( hItem, TVIS_SELECTED ) & TVIS_SELECTED )
return hItem;
return NULL;
}
///////////////////////////////////////////////////////////////////////////////
// Select/unselect item without unselecting other items
BOOL CTreeCtrlEx::SelectItemEx(HTREEITEM hItem, BOOL bSelect/*=TRUE*/)
{
HTREEITEM hSelItem = GetSelectedItem();
if ( hItem==hSelItem )
{
if ( !bSelect )
{
SelectItem( NULL );
return TRUE;
}
return FALSE;
}
SelectItem( hItem );
m_hFirstSelectedItem=hItem;
// Reselect previous "real" selected item which was unselected byt SelectItem()
if ( hSelItem )
SetItemState( hSelItem, TVIS_SELECTED, TVIS_SELECTED );
return TRUE;
}
///////////////////////////////////////////////////////////////////////////////
// Select visible items between specified 'from' and 'to' item (including these!)
// If the 'to' item is above the 'from' item, it traverses the tree in reverse
// direction. Selection on other items is cleared!
BOOL CTreeCtrlEx::SelectItems( HTREEITEM hFromItem, HTREEITEM hToItem )
{
// Determine direction of selection
// (see what item comes first in the tree)
HTREEITEM hItem = GetRootItem();
while ( hItem && hItem!=hFromItem && hItem!=hToItem )
hItem = GetNextVisibleItem( hItem );
if ( !hItem )
return FALSE; // Items not visible in tree
BOOL bReverse = hItem==hToItem;
// "Really" select the 'to' item (which will deselect
// the previously selected item)
SelectItem( hToItem );
// Go through all visible items again and select/unselect
hItem = GetRootItem();
BOOL bSelect = FALSE;
while ( hItem )
{
if ( hItem == ( bReverse ? hToItem : hFromItem ) )
bSelect = TRUE;
if ( bSelect )
{
if ( !( GetItemState( hItem, TVIS_SELECTED ) & TVIS_SELECTED ) )
SetItemState( hItem, TVIS_SELECTED, TVIS_SELECTED );
}
else
{
if ( GetItemState( hItem, TVIS_SELECTED ) & TVIS_SELECTED )
SetItemState( hItem, 0, TVIS_SELECTED );
}
if ( hItem == ( bReverse ? hFromItem : hToItem ) )
bSelect = FALSE;
hItem = GetNextVisibleItem( hItem );
}
return TRUE;
}
///////////////////////////////////////////////////////////////////////////////
// Clear selected state on all visible items
void CTreeCtrlEx::ClearSelection(BOOL bMultiOnly/*=FALSE*/)
{
// if ( !bMultiOnly )
// SelectItem( NULL );
for ( HTREEITEM hItem=GetRootItem(); hItem!=NULL; hItem=GetNextVisibleItem( hItem ) )
if ( GetItemState( hItem, TVIS_SELECTED ) & TVIS_SELECTED )
SetItemState( hItem, 0, TVIS_SELECTED );
}
///////////////////////////////////////////////////////////////////////////////
// If a node is collapsed, we should clear selections of its child items
BOOL CTreeCtrlEx::OnItemexpanding(NMHDR* pNMHDR, LRESULT* pResult)
{
NM_TREEVIEW* pNMTreeView = (NM_TREEVIEW*)pNMHDR;
if ( pNMTreeView->action == TVE_COLLAPSE )
{
HTREEITEM hItem = GetChildItem( pNMTreeView->itemNew.hItem );
while ( hItem )
{
if ( GetItemState( hItem, TVIS_SELECTED ) & TVIS_SELECTED )
SetItemState( hItem, 0, TVIS_SELECTED );
// Get the next node: First see if current node has a child
HTREEITEM hNextItem = GetChildItem( hItem );
if ( !hNextItem )
{
// No child: Get next sibling item
if ( !( hNextItem = GetNextSiblingItem( hItem ) ) )
{
HTREEITEM hParentItem = hItem;
while ( !hNextItem )
{
// No more children: Get parent
if ( !( hParentItem = GetParentItem( hParentItem ) ) )
break;
// Quit when parent is the collapsed node
// (Don't do anything to siblings of this)
if ( hParentItem == pNMTreeView->itemNew.hItem )
break;
// Get next sibling to parent
hNextItem = GetNextSiblingItem( hParentItem );
}
// Quit when parent is the collapsed node
if ( hParentItem == pNMTreeView->itemNew.hItem )
break;
}
}
hItem = hNextItem;
}
}
*pResult = 0;
return FALSE; // Allow parent to handle this notification as well
}
///////////////////////////////////////////////////////////////////////////////
// Intercept TVN_SELCHANGED and pass it only to the parent window of the
// selection process is finished
BOOL CTreeCtrlEx::OnSelchanged(NMHDR* pNMHDR, LRESULT* pResult)
{
// Return TRUE if selection is not complete. This will prevent the
// notification from being sent to parent.
return !m_bSelectionComplete;
}
///////////////////////////////////////////////////////////////////////////////
// Ensure the multiple selected items are drawn correctly when loosing/getting
// the focus
BOOL CTreeCtrlEx::OnSetfocus(NMHDR* pNMHDR, LRESULT* pResult)
{
Invalidate();
*pResult = 0;
return FALSE;
}
BOOL CTreeCtrlEx::OnKillfocus(NMHDR* pNMHDR, LRESULT* pResult)
{
Invalidate();
*pResult = 0;
return FALSE;
}
void CTreeCtrlEx::OnLButtonDblClk(UINT nFlags, CPoint point)
{
// We stop label editing.
m_bEditLabelPending = FALSE;
CTreeCtrl::OnLButtonDblClk(nFlags, point);
}
void CTreeCtrlEx::OnTimer(UINT nIDEvent)
{
if (nIDEvent == TCEX_EDITLABEL)
{
// Stop the timer.
KillTimer(m_idTimer);
// Invoke label editing.
if (m_bEditLabelPending)
EditLabel(GetSelectedItem());
m_bEditLabelPending = FALSE;
return;
}
CTreeCtrl::OnTimer(nIDEvent);
}
///////////////////////////////////////////////////////////////////////////////
// Retreives a tree ctrl item given the item's data
HTREEITEM CTreeCtrlEx::ItemFromData(DWORD dwData, HTREEITEM hStartAtItem/*=NULL*/) const
{
// Traverse all items in tree control
HTREEITEM hItem;
if ( hStartAtItem )
hItem = hStartAtItem;
else
hItem = GetRootItem();
while ( hItem )
{
if ( dwData == (DWORD)GetItemData( hItem ) )
return hItem;
// Get first child node
HTREEITEM hNextItem = GetChildItem( hItem );
if ( !hNextItem )
{
// Get next sibling child
hNextItem = GetNextSiblingItem( hItem );
if ( !hNextItem )
{
HTREEITEM hParentItem=hItem;
while ( !hNextItem && hParentItem )
{
// No more children: Get next sibling to parent
hParentItem = GetParentItem( hParentItem );
hNextItem = GetNextSiblingItem( hParentItem );
}
}
}
hItem = hNextItem;
}
return NULL;
}
/////////////////////////////////////////////////////////////////////////////
// Global function to retreive a HTREEITEM from a tree control, given the
// item's itemdata.
HTREEITEM GetTreeItemFromData(CTreeCtrl& treeCtrl, DWORD dwData, HTREEITEM hStartAtItem /*=NULL*/)
{
// Traverse from given item (or all items if hFromItem is NULL)
HTREEITEM hItem;
if ( hStartAtItem )
hItem=hStartAtItem;
else
hItem = treeCtrl.GetRootItem();
while ( hItem )
{
if ( dwData == (DWORD)treeCtrl.GetItemData( hItem ) )
return hItem;
// Get first child node
HTREEITEM hNextItem = treeCtrl.GetChildItem( hItem );
if ( !hNextItem )
{
// Get next sibling child
hNextItem = treeCtrl.GetNextSiblingItem( hItem );
if ( !hNextItem )
{
HTREEITEM hParentItem=hItem;
while ( !hNextItem && hParentItem )
{
// No more children: Get next sibling to parent
hParentItem = treeCtrl.GetParentItem( hParentItem );
hNextItem = treeCtrl.GetNextSiblingItem( hParentItem );
}
}
}
hItem = hNextItem;
}
return NULL;
}
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