// get HTREEITEM from wxTreeItemId
#define HITEM(item) ((HTREEITEM)(((item).m_pItem)))
+
+// older SDKs are missing these
+#ifndef TVN_ITEMCHANGINGA
+
+#define TVN_ITEMCHANGINGA (TVN_FIRST-16)
+#define TVN_ITEMCHANGINGW (TVN_FIRST-17)
+
+typedef struct tagNMTVITEMCHANGE
+{
+ NMHDR hdr;
+ UINT uChanged;
+ HTREEITEM hItem;
+ UINT uStateNew;
+ UINT uStateOld;
+ LPARAM lParam;
+} NMTVITEMCHANGE;
+
+#endif
+
+
+// this global variable is used on vista systems for preventing unwanted
+// item state changes in the vista tree control. It is only used in
+// multi-select mode on vista systems.
+
+static HTREEITEM gs_unlockItem = NULL;
+
+class TreeItemUnlocker
+{
+public:
+ TreeItemUnlocker(HTREEITEM item) { gs_unlockItem = item; }
+ ~TreeItemUnlocker() { gs_unlockItem = NULL; }
+};
+
+
// ----------------------------------------------------------------------------
// private functions
// ----------------------------------------------------------------------------
tvi.stateMask = TVIS_SELECTED;
tvi.hItem = hItem;
+ TreeItemUnlocker unlocker(hItem);
+
if ( !TreeView_GetItem(hwndTV, &tvi) )
{
wxLogLastError(wxT("TreeView_GetItem"));
tvi.state = select ? TVIS_SELECTED : 0;
tvi.hItem = hItem;
+ TreeItemUnlocker unlocker(hItem);
+
if ( TreeView_SetItem(hwndTV, &tvi) == -1 )
{
wxLogLastError(wxT("TreeView_SetItem"));
SelectItem(hwndTV, htItem, false);
}
-static inline void ToggleItemSelection(HWND hwndTV, HTREEITEM htItem)
-{
- SelectItem(hwndTV, htItem, !IsItemSelected(hwndTV, htItem));
-}
-
// helper function which selects all items in a range and, optionally,
// unselects all others
static void SelectRange(HWND hwndTV,
// helper function which tricks the standard control into changing the focused
// item without changing anything else (if someone knows why Microsoft doesn't
// allow to do it by just setting TVIS_FOCUSED flag, please tell me!)
-static void SetFocus(HWND hwndTV, HTREEITEM htItem)
+//
+// returns true if the focus was changed, false if the given item was already
+// the focused one
+static bool SetFocus(HWND hwndTV, HTREEITEM htItem)
{
// the current focus
HTREEITEM htFocus = (HTREEITEM)TreeView_GetSelection(hwndTV);
+ if ( htItem == htFocus )
+ return false;
+
if ( htItem )
{
- // set the focus
- if ( htItem != htFocus )
- {
- // remember the selection state of the item
- bool wasSelected = IsItemSelected(hwndTV, htItem);
+ // remember the selection state of the item
+ bool wasSelected = IsItemSelected(hwndTV, htItem);
- if ( htFocus && IsItemSelected(hwndTV, htFocus) )
- {
- // prevent the tree from unselecting the old focus which it
- // would do by default (TreeView_SelectItem unselects the
- // focused item)
- TreeView_SelectItem(hwndTV, 0);
- SelectItem(hwndTV, htFocus);
- }
+ if ( htFocus && IsItemSelected(hwndTV, htFocus) )
+ {
+ // prevent the tree from unselecting the old focus which it
+ // would do by default (TreeView_SelectItem unselects the
+ // focused item)
+ TreeView_SelectItem(hwndTV, 0);
+ SelectItem(hwndTV, htFocus);
+ }
- TreeView_SelectItem(hwndTV, htItem);
+ TreeView_SelectItem(hwndTV, htItem);
- if ( !wasSelected )
- {
- // need to clear the selection which TreeView_SelectItem() gave
- // us
- UnselectItem(hwndTV, htItem);
- }
- //else: was selected, still selected - ok
+ if ( !wasSelected )
+ {
+ // need to clear the selection which TreeView_SelectItem() gave
+ // us
+ UnselectItem(hwndTV, htItem);
}
- //else: nothing to do, focus already there
+ //else: was selected, still selected - ok
}
- else
+ else // reset focus
{
- if ( htFocus )
- {
- bool wasFocusSelected = IsItemSelected(hwndTV, htFocus);
+ bool wasFocusSelected = IsItemSelected(hwndTV, htFocus);
- // just clear the focus
- TreeView_SelectItem(hwndTV, 0);
+ // just clear the focus
+ TreeView_SelectItem(hwndTV, 0);
- if ( wasFocusSelected )
- {
- // restore the selection state
- SelectItem(hwndTV, htFocus);
- }
+ if ( wasFocusSelected )
+ {
+ // restore the selection state
+ SelectItem(hwndTV, htFocus);
}
- //else: nothing to do, no focus already
}
+
+ return true;
}
// ----------------------------------------------------------------------------
wxFLAGS_MEMBER(wxTR_HAS_VARIABLE_ROW_HEIGHT)
wxFLAGS_MEMBER(wxTR_SINGLE)
wxFLAGS_MEMBER(wxTR_MULTIPLE)
+#if WXWIN_COMPATIBILITY_2_8
wxFLAGS_MEMBER(wxTR_EXTENDED)
+#endif
wxFLAGS_MEMBER(wxTR_DEFAULT_STYLE)
wxEND_FLAGS( wxTreeCtrlStyle )
{
m_textCtrl = NULL;
m_hasAnyAttr = false;
+#if wxUSE_DRAGIMAGE
m_dragImage = NULL;
+#endif
m_pVirtualRoot = NULL;
// initialize the global array of events now as it can't be done statically
void wxTreeCtrl::DoSetItem(wxTreeViewItem *tvItem)
{
+ TreeItemUnlocker unlocker(tvItem->hItem);
+
if ( TreeView_SetItem(GetHwnd(), tvItem) == -1 )
{
wxLogLastError(wxT("TreeView_SetItem"));
{
if ( item == m_idEdited )
{
- ::SetWindowText(hwndEdit, text);
+ ::SetWindowText(hwndEdit, text.wx_str());
}
}
}
wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
wxASSERT_MSG( IsVisible(item), wxT("The item you call GetNextVisible() for must be visible itself!"));
- return wxTreeItemId(TreeView_GetNextVisible(GetHwnd(), HITEM(item)));
+ wxTreeItemId next(TreeView_GetNextVisible(GetHwnd(), HITEM(item)));
+ if ( next.IsOk() && !IsVisible(next) )
+ {
+ // Win32 considers that any non-collapsed item is visible while we want
+ // to return only really visible items
+ next.Unset();
+ }
+
+ return next;
}
wxTreeItemId wxTreeCtrl::GetPrevVisible(const wxTreeItemId& item) const
wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
wxASSERT_MSG( IsVisible(item), wxT("The item you call GetPrevVisible() for must be visible itself!"));
- return wxTreeItemId(TreeView_GetPrevVisible(GetHwnd(), HITEM(item)));
+ wxTreeItemId prev(TreeView_GetPrevVisible(GetHwnd(), HITEM(item)));
+ if ( prev.IsOk() && !IsVisible(prev) )
+ {
+ // just as above, Win32 function will happily return the previous item
+ // in the tree for the first visible item too
+ prev.Unset();
+ }
+
+ return prev;
}
// ----------------------------------------------------------------------------
{
wxCHECK_RET( !IsHiddenRoot(item), _T("can't select hidden root item") );
- if ( m_windowStyle & wxTR_MULTIPLE )
- {
- ::SelectItem(GetHwnd(), HITEM(item), select);
- }
- else
- {
- wxASSERT_MSG( select,
- _T("SelectItem(false) works only for multiselect") );
-
- // inspite of the docs (MSDN Jan 99 edition), we don't seem to receive
- // the notification from the control (i.e. TVN_SELCHANG{ED|ING}), so
- // send them ourselves
+ wxASSERT_MSG( select || HasFlag(wxTR_MULTIPLE),
+ _T("SelectItem(false) works only for multiselect") );
- wxTreeEvent event(wxEVT_COMMAND_TREE_SEL_CHANGING, this, item);
- if ( !GetEventHandler()->ProcessEvent(event) || event.IsAllowed() )
+ wxTreeEvent event(wxEVT_COMMAND_TREE_SEL_CHANGING, this, item);
+ if ( !GetEventHandler()->ProcessEvent(event) || event.IsAllowed() )
+ {
+ if ( HasFlag(wxTR_MULTIPLE) )
{
- if ( !TreeView_SelectItem(GetHwnd(), HITEM(item)) )
+ if ( !::SelectItem(GetHwnd(), HITEM(item), select) )
{
wxLogLastError(wxT("TreeView_SelectItem"));
+ return;
}
- else // ok
+ }
+ else // single selection
+ {
+ // use TreeView_SelectItem() to deselect the previous selection
+ if ( !TreeView_SelectItem(GetHwnd(), HITEM(item)) )
{
- event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGED);
- (void)GetEventHandler()->ProcessEvent(event);
+ wxLogLastError(wxT("TreeView_SelectItem"));
+ return;
}
}
- //else: program vetoed the change
+
+ event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGED);
+ (void)GetEventHandler()->ProcessEvent(event);
}
+ //else: program vetoed the change
}
void wxTreeCtrl::EnsureVisible(const wxTreeItemId& item)
return wxTreeCtrlBase::MSWShouldPreProcessMessage(msg);
}
-bool wxTreeCtrl::MSWCommand(WXUINT cmd, WXWORD id)
+bool wxTreeCtrl::MSWCommand(WXUINT cmd, WXWORD id_)
{
+ const int id = (signed short)id_;
+
if ( cmd == EN_UPDATE )
{
wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, id);
SetFocus();
// toggle selected state
- ::ToggleItemSelection(GetHwnd(), htItem);
+ ToggleItemSelection(htItem);
::SetFocus(GetHwnd(), htItem);
::SetFocus(GetHwnd(), htItem);
processed = true;
}
+ else // click on a single selected item
+ {
+ // don't interfere with the default processing in
+ // WM_MOUSEMOVE handler below as the default window
+ // proc will start the drag itself if we let have
+ // WM_LBUTTONDOWN
+ m_htClickedItem.Unset();
+ }
// reset on any click without Shift
m_htSelStart.Unset();
int cx = abs(m_ptClick.x - x);
int cy = abs(m_ptClick.y - y);
- if ( cx > GetSystemMetrics( SM_CXDRAG ) || cy > GetSystemMetrics( SM_CYDRAG ) )
+ if ( cx > ::GetSystemMetrics(SM_CXDRAG) ||
+ cy > ::GetSystemMetrics(SM_CYDRAG) )
{
- HWND pWnd = ::GetParent( GetHwnd() );
- if ( pWnd )
- {
- NM_TREEVIEW tv;
+ NM_TREEVIEW tv;
+ wxZeroMemory(tv);
- tv.hdr.hwndFrom = GetHwnd();
- tv.hdr.idFrom = ::GetWindowLong( GetHwnd(), GWL_ID );
- tv.hdr.code = TVN_BEGINDRAG;
+ tv.hdr.hwndFrom = GetHwnd();
+ tv.hdr.idFrom = ::GetWindowLong(GetHwnd(), GWL_ID);
+ tv.hdr.code = TVN_BEGINDRAG;
- tv.itemNew.hItem = HITEM(m_htClickedItem);
+ tv.itemNew.hItem = HITEM(m_htClickedItem);
- TVITEM tviAux;
- ZeroMemory(&tviAux, sizeof(tviAux));
- tviAux.hItem = HITEM(m_htClickedItem);
- tviAux.mask = TVIF_STATE | TVIF_PARAM;
- tviAux.stateMask = 0xffffffff;
- TreeView_GetItem( GetHwnd(), &tviAux );
- tv.itemNew.state = tviAux.state;
- tv.itemNew.lParam = tviAux.lParam;
+ TVITEM tviAux;
+ wxZeroMemory(tviAux);
- tv.ptDrag.x = x;
- tv.ptDrag.y = y;
+ tviAux.hItem = HITEM(m_htClickedItem);
+ tviAux.mask = TVIF_STATE | TVIF_PARAM;
+ tviAux.stateMask = 0xffffffff;
+ TreeView_GetItem(GetHwnd(), &tviAux);
- ::SendMessage( pWnd, WM_NOTIFY, tv.hdr.idFrom, (LPARAM)&tv );
- }
+ tv.itemNew.state = tviAux.state;
+ tv.itemNew.lParam = tviAux.lParam;
+
+ tv.ptDrag.x = x;
+ tv.ptDrag.y = y;
+
+ // do it before SendMessage() call below to avoid
+ // reentrancies here if there is another WM_MOUSEMOVE
+ // in the queue already
m_htClickedItem.Unset();
+
+ ::SendMessage(GetHwndOf(GetParent()), WM_NOTIFY,
+ tv.hdr.idFrom, (LPARAM)&tv );
+
+ // don't pass it to the default window proc, it would
+ // start dragging again
+ processed = true;
}
}
#endif // __WXWINCE__
+#if wxUSE_DRAGIMAGE
if ( m_dragImage )
{
m_dragImage->Move(wxPoint(x, y));
m_dragImage->Show();
}
}
+#endif // wxUSE_DRAGIMAGE
break;
case WM_LBUTTONUP:
// fall through
case WM_RBUTTONUP:
+#if wxUSE_DRAGIMAGE
if ( m_dragImage )
{
m_dragImage->EndDrag();
// are selected simultaneously which is quite weird
TreeView_SelectDropTarget(GetHwnd(), 0);
}
+#endif // wxUSE_DRAGIMAGE
break;
}
}
case VK_SPACE:
if ( bCtrl )
{
- ::ToggleItemSelection(GetHwnd(), htSel);
+ ToggleItemSelection(htSel);
}
else
{
if ( wParam == VK_SPACE || wParam == VK_RETURN )
return 0;
}
+#if wxUSE_DRAGIMAGE
+ else if ( nMsg == WM_KEYDOWN )
+ {
+ if ( wParam == VK_ESCAPE )
+ {
+ if ( m_dragImage )
+ {
+ m_dragImage->EndDrag();
+ delete m_dragImage;
+ m_dragImage = NULL;
+
+ // if we don't do it, the tree seems to think that 2 items
+ // are selected simultaneously which is quite weird
+ TreeView_SelectDropTarget(GetHwnd(), 0);
+ }
+ }
+ }
+#endif // wxUSE_DRAGIMAGE
return wxControl::MSWDefWindowProc(nMsg, wParam, lParam);
}
}
break;
+
+ // Vista's tree control has introduced some problems with our
+ // multi-selection tree. When TreeView_SelectItem() is called,
+ // the wrong items are deselected.
+
+ // Fortunately, Vista provides a new notification, TVN_ITEMCHANGING
+ // that can be used to regulate this incorrect behavior. The
+ // following messages will allow only the unlocked item's selection
+ // state to change
+ case TVN_ITEMCHANGINGA:
+ case TVN_ITEMCHANGINGW:
+ {
+ // we only need to handles these in multi-select trees
+ if ( HasFlag(wxTR_MULTIPLE) )
+ {
+ // get info about the item about to be changed
+ NMTVITEMCHANGE* info = (NMTVITEMCHANGE*)lParam;
+ if (info->hItem != gs_unlockItem)
+ {
+ // item's state is locked, don't allow the change
+ // returning 1 will disallow the change
+ *result = 1;
+ return true;
+ }
+ }
+
+ // allow the state change
+ }
+ return false;
+
// NB: MSLU is broken and sends TVN_SELCHANGEDA instead of
// TVN_SELCHANGEDW in Unicode mode under Win98. Therefore
// we have to handle both messages:
event.m_itemOld = tv->itemOld.hItem;
}
}
+
+ // we receive this message from WM_LBUTTONDOWN handler inside
+ // comctl32.dll and so before the click is passed to
+ // DefWindowProc() which sets the focus to the window which was
+ // clicked and this can lead to unexpected event sequences: for
+ // example, we may get a "selection change" event from the tree
+ // before getting a "kill focus" event for the text control which
+ // had the focus previously, thus breaking user code doing input
+ // validation
+ //
+ // to avoid such surprises, we force the generation of focus events
+ // now, before we generate the selection change ones
+ SetFocus();
break;
// instead of explicitly checking for _WIN32_IE, check if the
case TVN_BEGINDRAG:
case TVN_BEGINRDRAG:
+#if wxUSE_DRAGIMAGE
if ( event.IsAllowed() )
{
// normally this is impossible because the m_dragImage is
m_dragImage->BeginDrag(wxPoint(0,0), this);
m_dragImage->Show();
}
+#endif // wxUSE_DRAGIMAGE
break;
case TVN_DELETEITEM:
break;
case TVN_ITEMEXPANDED:
- // the item is not refreshed properly after expansion when it has
- // an image depending on the expanded/collapsed state - bug in
- // comctl32.dll or our code?
{
NM_TREEVIEW *tv = (NM_TREEVIEW *)lParam;
- wxTreeItemId id(tv->itemNew.hItem);
+ const wxTreeItemId id(tv->itemNew.hItem);
- int image = GetItemImage(id, wxTreeItemIcon_Expanded);
- if ( image != -1 )
+ if ( tv->action == TVE_COLLAPSE )
+ {
+ if ( wxApp::GetComCtl32Version() >= 600 )
+ {
+ // for some reason the item selection rectangle depends
+ // on whether it is expanded or collapsed (at least
+ // with comctl32.dll v6): it is wider (by 3 pixels) in
+ // the expanded state, so when the item collapses and
+ // then is deselected the rightmost 3 pixels of the
+ // previously drawn selection are left on the screen
+ //
+ // it's not clear if it's a bug in comctl32.dll or in
+ // our code (because it does not happen in Explorer but
+ // OTOH we don't do anything which could result in this
+ // AFAICS) but we do need to work around it to avoid
+ // ugly artifacts
+ RefreshItem(id);
+ }
+ }
+ else // expand
{
- RefreshItem(id);
+ // the item is also not refreshed properly after expansion when
+ // it has an image depending on the expanded/collapsed state:
+ // again, it's not clear if the bug is in comctl32.dll or our
+ // code...
+ int image = GetItemImage(id, wxTreeItemIcon_Expanded);
+ if ( image != -1 )
+ {
+ RefreshItem(id);
+ }
}
}
break;
projects / wxWidgets.git / blobdiff