X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/5708ae18f2c9b164713918405a6a738ca5538550..739c5499fcab1c165b8dd0591c9fd9e2329b3cf9:/src/msw/treectrl.cpp?ds=sidebyside diff --git a/src/msw/treectrl.cpp b/src/msw/treectrl.cpp index 9e8c7e31d1..0ac6f626c0 100644 --- a/src/msw/treectrl.cpp +++ b/src/msw/treectrl.cpp @@ -40,12 +40,9 @@ #include "wx/dynlib.h" #include "wx/msw/private.h" -// Set this to 1 to be _absolutely_ sure that repainting will work for all -// comctl32.dll versions -#define wxUSE_COMCTL32_SAFELY 0 - #include "wx/imaglist.h" #include "wx/msw/dragimag.h" +#include "wx/msw/uxtheme.h" // macros to hide the cast ugliness // -------------------------------- @@ -80,20 +77,28 @@ typedef struct tagNMTVITEMCHANGE // The vista tree control includes some new code that originally broke the // multi-selection tree, causing seemingly spurious item selection state changes // during Shift or Ctrl-click item selection. (To witness the original broken -// behavior, simply make IsLocked() below always return false). This problem was +// behaviour, simply make IsLocked() below always return false). This problem was // solved by using the following class to 'unlock' an item's selection state. class TreeItemUnlocker { public: // unlock a single item - TreeItemUnlocker(HTREEITEM item) { ms_unlockedItem = item; } + TreeItemUnlocker(HTREEITEM item) + { + m_oldUnlockedItem = ms_unlockedItem; + ms_unlockedItem = item; + } // unlock all items, don't use unless absolutely necessary - TreeItemUnlocker() { ms_unlockedItem = (HTREEITEM)-1; } + TreeItemUnlocker() + { + m_oldUnlockedItem = ms_unlockedItem; + ms_unlockedItem = (HTREEITEM)-1; + } // lock everything back - ~TreeItemUnlocker() { ms_unlockedItem = NULL; } + ~TreeItemUnlocker() { ms_unlockedItem = m_oldUnlockedItem; } // check if the item state is currently locked @@ -102,6 +107,9 @@ public: private: static HTREEITEM ms_unlockedItem; + HTREEITEM m_oldUnlockedItem; + + wxDECLARE_NO_COPY_CLASS(TreeItemUnlocker); }; HTREEITEM TreeItemUnlocker::ms_unlockedItem = NULL; @@ -134,6 +142,32 @@ private: // private functions // ---------------------------------------------------------------------------- +namespace +{ + +// Work around a problem with TreeView_GetItemRect() when using MinGW/Cygwin: +// it results in warnings about breaking strict aliasing rules because HITEM is +// passed via a RECT pointer, so use a union to avoid them and define our own +// version of the standard macro using it. +union TVGetItemRectParam +{ + RECT rect; + HTREEITEM hItem; +}; + +inline bool +wxTreeView_GetItemRect(HWND hwnd, + HTREEITEM hItem, + TVGetItemRectParam& param, + BOOL fItemRect) +{ + param.hItem = hItem; + return ::SendMessage(hwnd, TVM_GETITEMRECT, fItemRect, + (LPARAM)¶m) == TRUE; +} + +} // anonymous namespace + // wrappers for TreeView_GetItem/TreeView_SetItem static bool IsItemSelected(HWND hwndTV, HTREEITEM hItem) { @@ -416,14 +450,18 @@ public: switch ( which ) { case wxTreeItemIcon_SelectedExpanded: - image = GetImage(wxTreeItemIcon_Expanded); + // We consider that expanded icon is more important than + // selected so test for it first. + image = m_images[wxTreeItemIcon_Expanded]; + if ( image == -1 ) + image = m_images[wxTreeItemIcon_Selected]; if ( image != -1 ) break; //else: fall through case wxTreeItemIcon_Selected: case wxTreeItemIcon_Expanded: - image = GetImage(wxTreeItemIcon_Normal); + image = m_images[wxTreeItemIcon_Normal]; break; case wxTreeItemIcon_Normal: @@ -601,72 +639,6 @@ private: // wxWin macros // ---------------------------------------------------------------------------- -#if wxUSE_EXTENDED_RTTI -WX_DEFINE_FLAGS( wxTreeCtrlStyle ) - -wxBEGIN_FLAGS( wxTreeCtrlStyle ) - // new style border flags, we put them first to - // use them for streaming out - wxFLAGS_MEMBER(wxBORDER_SIMPLE) - wxFLAGS_MEMBER(wxBORDER_SUNKEN) - wxFLAGS_MEMBER(wxBORDER_DOUBLE) - wxFLAGS_MEMBER(wxBORDER_RAISED) - wxFLAGS_MEMBER(wxBORDER_STATIC) - wxFLAGS_MEMBER(wxBORDER_NONE) - - // old style border flags - wxFLAGS_MEMBER(wxSIMPLE_BORDER) - wxFLAGS_MEMBER(wxSUNKEN_BORDER) - wxFLAGS_MEMBER(wxDOUBLE_BORDER) - wxFLAGS_MEMBER(wxRAISED_BORDER) - wxFLAGS_MEMBER(wxSTATIC_BORDER) - wxFLAGS_MEMBER(wxBORDER) - - // standard window styles - wxFLAGS_MEMBER(wxTAB_TRAVERSAL) - wxFLAGS_MEMBER(wxCLIP_CHILDREN) - wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW) - wxFLAGS_MEMBER(wxWANTS_CHARS) - wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE) - wxFLAGS_MEMBER(wxALWAYS_SHOW_SB ) - wxFLAGS_MEMBER(wxVSCROLL) - wxFLAGS_MEMBER(wxHSCROLL) - - wxFLAGS_MEMBER(wxTR_EDIT_LABELS) - wxFLAGS_MEMBER(wxTR_NO_BUTTONS) - wxFLAGS_MEMBER(wxTR_HAS_BUTTONS) - wxFLAGS_MEMBER(wxTR_TWIST_BUTTONS) - wxFLAGS_MEMBER(wxTR_NO_LINES) - wxFLAGS_MEMBER(wxTR_FULL_ROW_HIGHLIGHT) - wxFLAGS_MEMBER(wxTR_LINES_AT_ROOT) - wxFLAGS_MEMBER(wxTR_HIDE_ROOT) - wxFLAGS_MEMBER(wxTR_ROW_LINES) - 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 ) - -IMPLEMENT_DYNAMIC_CLASS_XTI(wxTreeCtrl, wxControl,"wx/treectrl.h") - -wxBEGIN_PROPERTIES_TABLE(wxTreeCtrl) - wxEVENT_PROPERTY( TextUpdated , wxEVT_COMMAND_TEXT_UPDATED , wxCommandEvent ) - wxEVENT_RANGE_PROPERTY( TreeEvent , wxEVT_COMMAND_TREE_BEGIN_DRAG , wxEVT_COMMAND_TREE_STATE_IMAGE_CLICK , wxTreeEvent ) - wxPROPERTY_FLAGS( WindowStyle , wxTreeCtrlStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style -wxEND_PROPERTIES_TABLE() - -wxBEGIN_HANDLERS_TABLE(wxTreeCtrl) -wxEND_HANDLERS_TABLE() - -wxCONSTRUCTOR_5( wxTreeCtrl , wxWindow* , Parent , wxWindowID , Id , wxPoint , Position , wxSize , Size , long , WindowStyle ) -#else -IMPLEMENT_DYNAMIC_CLASS(wxTreeCtrl, wxControl) -#endif - // ---------------------------------------------------------------------------- // constants // ---------------------------------------------------------------------------- @@ -806,30 +778,32 @@ bool wxTreeCtrl::Create(wxWindow *parent, if ( !MSWCreateControl(WC_TREEVIEW, wstyle, pos, size) ) return false; -#if wxUSE_COMCTL32_SAFELY - wxWindow::SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW)); - wxWindow::SetForegroundColour(wxWindow::GetParent()->GetForegroundColour()); -#elif 1 SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW)); SetForegroundColour(wxWindow::GetParent()->GetForegroundColour()); -#else - // This works around a bug in the Windows tree control whereby for some versions - // of comctrl32, setting any colour actually draws the background in black. - // This will initialise the background to the system colour. - // THIS FIX NOW REVERTED since it caused problems on _other_ systems. - // Assume the user has an updated comctl32.dll. - ::SendMessage(GetHwnd(), TVM_SETBKCOLOR, 0,-1); - wxWindow::SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW)); - SetForegroundColour(wxWindow::GetParent()->GetForegroundColour()); -#endif wxSetCCUnicodeFormat(GetHwnd()); + if ( m_windowStyle & wxTR_TWIST_BUTTONS ) + { + // Under Vista and later Explorer uses rotating ("twist") buttons + // instead of the default "+/-" ones so apply its theme to the tree + // control to implement this style. + if ( wxGetWinVersion() >= wxWinVersion_Vista ) + { + if ( wxUxThemeEngine *theme = wxUxThemeEngine::GetIfActive() ) + { + theme->SetWindowTheme(GetHwnd(), L"EXPLORER", NULL); + } + } + } + return true; } wxTreeCtrl::~wxTreeCtrl() { + m_isBeingDeleted = true; + // delete any attributes if ( m_hasAnyAttr ) { @@ -943,24 +917,20 @@ size_t wxTreeCtrl::GetChildrenCount(const wxTreeItemId& item, bool wxTreeCtrl::SetBackgroundColour(const wxColour &colour) { -#if !wxUSE_COMCTL32_SAFELY if ( !wxWindowBase::SetBackgroundColour(colour) ) return false; ::SendMessage(GetHwnd(), TVM_SETBKCOLOR, 0, colour.GetPixel()); -#endif return true; } bool wxTreeCtrl::SetForegroundColour(const wxColour &colour) { -#if !wxUSE_COMCTL32_SAFELY if ( !wxWindowBase::SetForegroundColour(colour) ) return false; ::SendMessage(GetHwnd(), TVM_SETTEXTCOLOR, 0, colour.GetPixel()); -#endif return true; } @@ -1000,7 +970,7 @@ void wxTreeCtrl::SetItemText(const wxTreeItemId& item, const wxString& text) return; wxTreeViewItem tvItem(item, TVIF_TEXT); - tvItem.pszText = (wxChar *)text.wx_str(); // conversion is ok + tvItem.pszText = wxMSW_CONV_LPTSTR(text); DoSetItem(&tvItem); // when setting the text of the item being edited, the text control should @@ -1013,7 +983,7 @@ void wxTreeCtrl::SetItemText(const wxTreeItemId& item, const wxString& text) { if ( item == m_idEdited ) { - ::SetWindowText(hwndEdit, text.wx_str()); + ::SetWindowText(hwndEdit, text.t_str()); } } } @@ -1271,14 +1241,10 @@ bool wxTreeCtrl::IsVisible(const wxTreeItemId& item) const } // Bug in Gnu-Win32 headers, so don't use the macro TreeView_GetItemRect - RECT rect; - - // this ugliness comes directly from MSDN - it *is* the correct way to pass - // the HTREEITEM with TVM_GETITEMRECT - *(HTREEITEM *)&rect = HITEM(item); + TVGetItemRectParam param; // true means to get rect for just the text, not the whole line - if ( !::SendMessage(GetHwnd(), TVM_GETITEMRECT, true, (LPARAM)&rect) ) + if ( !wxTreeView_GetItemRect(GetHwnd(), HITEM(item), param, TRUE) ) { // if TVM_GETITEMRECT returned false, then the item is definitely not // visible (because its parent is not expanded) @@ -1288,7 +1254,7 @@ bool wxTreeCtrl::IsVisible(const wxTreeItemId& item) const // however if it returned true, the item might still be outside the // currently visible part of the tree, test for it (notice that partly // visible means visible here) - return rect.bottom > 0 && rect.top < GetClientSize().y; + return param.rect.bottom > 0 && param.rect.top < GetClientSize().y; } bool wxTreeCtrl::ItemHasChildren(const wxTreeItemId& item) const @@ -1521,7 +1487,7 @@ wxTreeItemId wxTreeCtrl::DoInsertAfter(const wxTreeItemId& parent, if ( !text.empty() ) { mask |= TVIF_TEXT; - tvIns.item.pszText = (wxChar *)text.wx_str(); // cast is ok + tvIns.item.pszText = wxMSW_CONV_LPTSTR(text); } else { @@ -1561,9 +1527,10 @@ wxTreeItemId wxTreeCtrl::DoInsertAfter(const wxTreeItemId& parent, // need this to make the "[+]" appear if ( firstChild ) { - RECT rect; - TreeView_GetItemRect(GetHwnd(), HITEM(parent), &rect, FALSE); - ::InvalidateRect(GetHwnd(), &rect, FALSE); + TVGetItemRectParam param; + + wxTreeView_GetItemRect(GetHwnd(), HITEM(parent), param, FALSE); + ::InvalidateRect(GetHwnd(), ¶m.rect, FALSE); } // associate the application tree item with Win32 tree item handle @@ -1966,23 +1933,25 @@ void wxTreeCtrl::SelectItem(const wxTreeItemId& item, bool select) // leave itemNew invalid } - // in spite 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 - + // Recent versions of comctl32.dll send TVN_SELCHANG{ED,ING} events + // when we call TreeView_SelectItem() but apparently some old ones did + // not so send the events ourselves and ignore those generated by + // TreeView_SelectItem() if m_changingSelection is set. wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING, this, itemNew); changingEvent.SetOldItem(itemOld); if ( IsTreeEventAllowed(changingEvent) ) { + TempSetter set(m_changingSelection); + if ( !TreeView_SelectItem(GetHwnd(), HITEM(itemNew)) ) { wxLogLastError(wxT("TreeView_SelectItem")); } else // ok { - SetFocusedItem(item); + ::SetFocus(GetHwnd(), HITEM(item)); wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED, this, itemNew); @@ -2029,8 +1998,7 @@ void wxTreeCtrl::DeleteTextCtrl() m_textCtrl->UnsubclassWin(); m_textCtrl->SetHWND(0); - delete m_textCtrl; - m_textCtrl = NULL; + wxDELETE(m_textCtrl); m_idEdited.Unset(); } @@ -2039,7 +2007,7 @@ void wxTreeCtrl::DeleteTextCtrl() wxTextCtrl *wxTreeCtrl::EditLabel(const wxTreeItemId& item, wxClassInfo *textControlClass) { - wxASSERT( textControlClass->IsKindOf(CLASSINFO(wxTextCtrl)) ); + wxASSERT( textControlClass->IsKindOf(wxCLASSINFO(wxTextCtrl)) ); DeleteTextCtrl(); @@ -2051,8 +2019,7 @@ wxTextCtrl *wxTreeCtrl::EditLabel(const wxTreeItemId& item, // returned false if ( !hWnd ) { - delete m_textCtrl; - m_textCtrl = NULL; + wxDELETE(m_textCtrl); return NULL; } @@ -2103,18 +2070,18 @@ bool wxTreeCtrl::GetBoundingRect(const wxTreeItemId& item, wxRect& rect, bool textOnly) const { - RECT rc; - // Virtual root items have no bounding rectangle if ( IS_VIRTUAL_ROOT(item) ) { return false; } - if ( TreeView_GetItemRect(GetHwnd(), HITEM(item), - &rc, textOnly) ) + TVGetItemRectParam param; + + if ( wxTreeView_GetItemRect(GetHwnd(), HITEM(item), param, textOnly) ) { - rect = wxRect(wxPoint(rc.left, rc.top), wxPoint(rc.right, rc.bottom)); + rect = wxRect(wxPoint(param.rect.left, param.rect.top), + wxPoint(param.rect.right, param.rect.bottom)); return true; } @@ -2200,7 +2167,7 @@ void wxTreeCtrl::SortChildren(const wxTreeItemId& item) // may be why as if you don't use the DECLARE_CLASS/IMPLEMENT_CLASS // combo for your derived wxTreeCtrl if will sort without // OnCompareItems - if ( GetClassInfo() == CLASSINFO(wxTreeCtrl) ) + if ( GetClassInfo() == wxCLASSINFO(wxTreeCtrl) ) { TreeView_SortChildren(GetHwnd(), HITEM(item), 0); } @@ -2657,18 +2624,7 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey) bool wxTreeCtrl::MSWHandleTreeKeyDownEvent(WXWPARAM wParam, WXLPARAM lParam) { wxTreeEvent keyEvent(wxEVT_COMMAND_TREE_KEY_DOWN, this); - - int keyCode = wxCharCodeMSWToWX(wParam); - - if ( !keyCode ) - { - // wxCharCodeMSWToWX() returns 0 to indicate that this is a - // simple ASCII key - keyCode = wParam; - } - - keyEvent.m_evtKey = CreateKeyEvent(wxEVT_KEY_DOWN, keyCode, - lParam, wParam); + keyEvent.m_evtKey = CreateKeyEvent(wxEVT_KEY_DOWN, wParam, lParam); bool processed = HandleTreeEvent(keyEvent); @@ -2740,13 +2696,16 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam) } // create the event - wxTreeEvent event(wxEVT_COMMAND_TREE_ITEM_MENU, this, item); + if ( item.IsOk() ) + { + wxTreeEvent event(wxEVT_COMMAND_TREE_ITEM_MENU, this, item); - event.m_pointDrag = pt; + event.m_pointDrag = pt; - if ( HandleTreeEvent(event) ) - processed = true; - //else: continue with generating wxEVT_CONTEXT_MENU in base class code + if ( HandleTreeEvent(event) ) + processed = true; + //else: continue with generating wxEVT_CONTEXT_MENU in base class code + } } else if ( (nMsg >= WM_MOUSEFIRST) && (nMsg <= WM_MOUSELAST) ) { @@ -2966,10 +2925,7 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam) // click if needed if ( processed ) { - int htFlags = 0; - wxTreeItemId item = HitTest(wxPoint(x, y), htFlags); - - if ( htFlags & wxTREE_HITTEST_ONITEMSTATEICON ) + if ( tvht.flags & TVHT_ONITEMSTATEICON ) { m_triggerStateImageClick = true; } @@ -3134,8 +3090,7 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam) if ( m_dragImage ) { m_dragImage->EndDrag(); - delete m_dragImage; - m_dragImage = NULL; + wxDELETE(m_dragImage); // generate the drag end event wxTreeEvent event(wxEVT_COMMAND_TREE_END_DRAG, @@ -3175,16 +3130,16 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam) // do it for the other items itself - help it wxArrayTreeItemIds selections; size_t count = GetSelections(selections); - RECT rect; + TVGetItemRectParam param; for ( size_t n = 0; n < count; n++ ) { // TreeView_GetItemRect() will return false if item is not // visible, which may happen perfectly well - if ( TreeView_GetItemRect(GetHwnd(), HITEM(selections[n]), - &rect, TRUE) ) + if ( wxTreeView_GetItemRect(GetHwnd(), HITEM(selections[n]), + param, TRUE) ) { - ::InvalidateRect(GetHwnd(), &rect, FALSE); + ::InvalidateRect(GetHwnd(), ¶m.rect, FALSE); } } } @@ -3275,8 +3230,7 @@ wxTreeCtrl::MSWDefWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam) if ( m_dragImage ) { m_dragImage->EndDrag(); - delete m_dragImage; - m_dragImage = NULL; + wxDELETE(m_dragImage); // if we don't do it, the tree seems to think that 2 items // are selected simultaneously which is quite weird @@ -3454,7 +3408,7 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result) // the wrong items are deselected. // Fortunately, Vista provides a new notification, TVN_ITEMCHANGING - // that can be used to regulate this incorrect behavior. The + // that can be used to regulate this incorrect behaviour. The // following messages will allow only the unlocked item's selection // state to change @@ -3484,7 +3438,7 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result) // we have to handle both messages: case TVN_SELCHANGEDA: case TVN_SELCHANGEDW: - if ( !HasFlag(wxTR_MULTIPLE) || !m_changingSelection ) + if ( !m_changingSelection ) { eventType = wxEVT_COMMAND_TREE_SEL_CHANGED; } @@ -3492,7 +3446,7 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result) case TVN_SELCHANGINGA: case TVN_SELCHANGINGW: - if ( !HasFlag(wxTR_MULTIPLE) || !m_changingSelection ) + if ( !m_changingSelection ) { if ( eventType == wxEVT_NULL ) eventType = wxEVT_COMMAND_TREE_SEL_CHANGING; @@ -3524,12 +3478,13 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result) // // to avoid such surprises, we force the generation of focus events // now, before we generate the selection change ones - SetFocus(); + if ( !m_changingSelection && !m_isBeingDeleted ) + SetFocus(); break; // instead of explicitly checking for _WIN32_IE, check if the // required symbols are available in the headers -#if defined(CDDS_PREPAINT) && !wxUSE_COMCTL32_SAFELY +#if defined(CDDS_PREPAINT) case NM_CUSTOMDRAW: { LPNMTVCUSTOMDRAW lptvcd = (LPNMTVCUSTOMDRAW)lParam; @@ -3558,7 +3513,10 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result) { wxLoadedDLL dllComCtl32(wxT("comctl32.dll")); if ( dllComCtl32.IsLoaded() ) + { wxDL_INIT_FUNC(s_pfn, ImageList_Copy, dllComCtl32); + loaded = true; + } } if ( !s_pfnImageList_Copy ) @@ -3700,7 +3658,7 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result) case NM_RCLICK: { TV_HITTESTINFO tvhti; - ::GetCursorPos(&tvhti.pt); + wxGetCursorPosMSW(&tvhti.pt); ::ScreenToClient(GetHwnd(), &tvhti.pt); if ( TreeView_HitTest(GetHwnd(), &tvhti) ) { @@ -3965,4 +3923,32 @@ void wxTreeCtrl::DoSetItemState(const wxTreeItemId& item, int state) DoSetItem(&tvItem); } +// ---------------------------------------------------------------------------- +// Update locking. +// ---------------------------------------------------------------------------- + +// Using WM_SETREDRAW with the native control is a bad idea as it's broken in +// some Windows versions (see http://support.microsoft.com/kb/130611) and +// doesn't seem to do anything in other ones (e.g. under Windows 7 the tree +// control keeps updating its scrollbars while the items are added to it, +// resulting in horrible flicker when adding even a couple of dozen items). +// So we hide it instead of freezing -- this still flickers, but actually not +// as badly as it would if we didn't do it. + +void wxTreeCtrl::DoFreeze() +{ + // Notice that we don't call wxWindow::Hide() here as we want the window to + // remain shown from wxWidgets point of view and also because + // wxWindowMSW::Show() calls Do{Freeze,Thaw}() itself, so we'd get into + // infinite recursion this way. + if ( IsShown() ) + ::ShowWindow(GetHwnd(), SW_HIDE); +} + +void wxTreeCtrl::DoThaw() +{ + if ( IsShown() ) + ::ShowWindow(GetHwnd(), SW_SHOW); +} + #endif // wxUSE_TREECTRL