///////////////////////////////////////////////////////////////////////////// // Name: src/msw/treectrl.cpp // Purpose: wxTreeCtrl // Author: Julian Smart // Modified by: Vadim Zeitlin to be less MSW-specific on 10.10.98 // Created: 1997 // RCS-ID: $Id$ // Copyright: (c) Julian Smart // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// // ============================================================================ // declarations // ============================================================================ // ---------------------------------------------------------------------------- // headers // ---------------------------------------------------------------------------- #ifdef __GNUG__ #pragma implementation "treectrl.h" #endif // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" #ifdef __BORLANDC__ #pragma hdrstop #endif #if wxUSE_TREECTRL #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 // Mingw32 is a bit mental even though this is done in winundef #ifdef GetFirstChild #undef GetFirstChild #endif #ifdef GetNextSibling #undef GetNextSibling #endif #if defined(__WIN95__) #include "wx/app.h" #include "wx/log.h" #include "wx/dynarray.h" #include "wx/imaglist.h" #include "wx/settings.h" #include "wx/msw/treectrl.h" #include "wx/msw/dragimag.h" #ifdef __GNUWIN32_OLD__ #include "wx/msw/gnuwin32/extra.h" #endif #if defined(__WIN95__) && !((defined(__GNUWIN32_OLD__) || defined(__TWIN32__)) && !defined(__CYGWIN10__)) #include #endif // Bug in headers, sometimes #ifndef TVIS_FOCUSED #define TVIS_FOCUSED 0x0001 #endif #ifndef TV_FIRST #define TV_FIRST 0x1100 #endif #ifndef TVS_CHECKBOXES #define TVS_CHECKBOXES 0x0100 #endif #ifndef TVS_FULLROWSELECT #define TVS_FULLROWSELECT 0x1000 #endif // old headers might miss these messages (comctl32.dll 4.71+ only) #ifndef TVM_SETBKCOLOR #define TVM_SETBKCOLOR (TV_FIRST + 29) #define TVM_SETTEXTCOLOR (TV_FIRST + 30) #endif // a macro to hide the ugliness of nested casts #define HITEM(item) (HTREEITEM)(WXHTREEITEM)(item) // the native control doesn't support multiple selections under MSW and we // have 2 ways to emulate them: either using TVS_CHECKBOXES style and let // checkboxes be the selection status (checked == selected) or by really // emulating everything, i.e. intercepting mouse and key events &c. The first // approach is much easier but doesn't work with comctl32.dll < 4.71 and also // looks quite ugly. #define wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE 0 // ---------------------------------------------------------------------------- // private functions // ---------------------------------------------------------------------------- // wrapper for TreeView_HitTest static HTREEITEM GetItemFromPoint(HWND hwndTV, int x, int y) { TV_HITTESTINFO tvht; tvht.pt.x = x; tvht.pt.y = y; return (HTREEITEM)TreeView_HitTest(hwndTV, &tvht); } #if !wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE // wrappers for TreeView_GetItem/TreeView_SetItem static bool IsItemSelected(HWND hwndTV, HTREEITEM hItem) { TV_ITEM tvi; tvi.mask = TVIF_STATE | TVIF_HANDLE; tvi.stateMask = TVIS_SELECTED; tvi.hItem = hItem; if ( !TreeView_GetItem(hwndTV, &tvi) ) { wxLogLastError(wxT("TreeView_GetItem")); } return (tvi.state & TVIS_SELECTED) != 0; } static void SelectItem(HWND hwndTV, HTREEITEM hItem, bool select = TRUE) { TV_ITEM tvi; tvi.mask = TVIF_STATE | TVIF_HANDLE; tvi.stateMask = TVIS_SELECTED; tvi.state = select ? TVIS_SELECTED : 0; tvi.hItem = hItem; if ( TreeView_SetItem(hwndTV, &tvi) == -1 ) { wxLogLastError(wxT("TreeView_SetItem")); } } static inline void UnselectItem(HWND hwndTV, HTREEITEM htItem) { 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, HTREEITEM htFirst, HTREEITEM htLast, bool unselectOthers = TRUE) { // find the first (or last) item and select it bool cont = TRUE; HTREEITEM htItem = (HTREEITEM)TreeView_GetRoot(hwndTV); while ( htItem && cont ) { if ( (htItem == htFirst) || (htItem == htLast) ) { if ( !IsItemSelected(hwndTV, htItem) ) { SelectItem(hwndTV, htItem); } cont = FALSE; } else { if ( unselectOthers && IsItemSelected(hwndTV, htItem) ) { UnselectItem(hwndTV, htItem); } } htItem = (HTREEITEM)TreeView_GetNextVisible(hwndTV, htItem); } // select the items in range cont = htFirst != htLast; while ( htItem && cont ) { if ( !IsItemSelected(hwndTV, htItem) ) { SelectItem(hwndTV, htItem); } cont = (htItem != htFirst) && (htItem != htLast); htItem = (HTREEITEM)TreeView_GetNextVisible(hwndTV, htItem); } // unselect the rest if ( unselectOthers ) { while ( htItem ) { if ( IsItemSelected(hwndTV, htItem) ) { UnselectItem(hwndTV, htItem); } htItem = (HTREEITEM)TreeView_GetNextVisible(hwndTV, htItem); } } // seems to be necessary - otherwise the just selected items don't always // appear as selected UpdateWindow(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) { // the current focus HTREEITEM htFocus = (HTREEITEM)TreeView_GetSelection(hwndTV); if ( htItem ) { // set the focus if ( htItem != htFocus ) { // 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); } 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 } //else: nothing to do, focus already there } else { if ( htFocus ) { bool wasFocusSelected = IsItemSelected(hwndTV, htFocus); // just clear the focus TreeView_SelectItem(hwndTV, 0); if ( wasFocusSelected ) { // restore the selection state SelectItem(hwndTV, htFocus); } } //else: nothing to do, no focus already } } #endif // wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE // ---------------------------------------------------------------------------- // private classes // ---------------------------------------------------------------------------- // a convenient wrapper around TV_ITEM struct which adds a ctor #ifdef __VISUALC__ #pragma warning( disable : 4097 ) // inheriting from typedef #endif struct wxTreeViewItem : public TV_ITEM { wxTreeViewItem(const wxTreeItemId& item, // the item handle UINT mask_, // fields which are valid UINT stateMask_ = 0) // for TVIF_STATE only { wxZeroMemory(*this); // hItem member is always valid mask = mask_ | TVIF_HANDLE; stateMask = stateMask_; hItem = HITEM(item); } }; // wxVirutalNode is used in place of a single root when 'hidden' root is // specified. class wxVirtualNode : public wxTreeViewItem { public: wxVirtualNode(wxTreeItemData *data) : wxTreeViewItem(TVI_ROOT, 0) { m_data = data; } ~wxVirtualNode() { delete m_data; } wxTreeItemData *GetData() const { return m_data; } void SetData(wxTreeItemData *data) { delete m_data; m_data = data; } private: wxTreeItemData *m_data; DECLARE_NO_COPY_CLASS(wxVirtualNode) }; #ifdef __VISUALC__ #pragma warning( default : 4097 ) #endif // a macro to get the virtual root, returns NULL if none #define GET_VIRTUAL_ROOT() ((wxVirtualNode *)m_pVirtualRoot) // returns TRUE if the item is the virtual root #define IS_VIRTUAL_ROOT(item) (HITEM(item) == TVI_ROOT) // a class which encapsulates the tree traversal logic: it vists all (unless // OnVisit() returns FALSE) items under the given one class wxTreeTraversal { public: wxTreeTraversal(const wxTreeCtrl *tree) { m_tree = tree; } // do traverse the tree: visit all items (recursively by default) under the // given one; return TRUE if all items were traversed or FALSE if the // traversal was aborted because OnVisit returned FALSE bool DoTraverse(const wxTreeItemId& root, bool recursively = TRUE); // override this function to do whatever is needed for each item, return // FALSE to stop traversing virtual bool OnVisit(const wxTreeItemId& item) = 0; protected: const wxTreeCtrl *GetTree() const { return m_tree; } private: bool Traverse(const wxTreeItemId& root, bool recursively); const wxTreeCtrl *m_tree; DECLARE_NO_COPY_CLASS(wxTreeTraversal) }; // internal class for getting the selected items class TraverseSelections : public wxTreeTraversal { public: TraverseSelections(const wxTreeCtrl *tree, wxArrayTreeItemIds& selections) : wxTreeTraversal(tree), m_selections(selections) { m_selections.Empty(); DoTraverse(tree->GetRootItem()); } virtual bool OnVisit(const wxTreeItemId& item) { // can't visit a virtual node. if ( (GetTree()->GetRootItem() == item) && (GetTree()->GetWindowStyle() & wxTR_HIDE_ROOT)) { return TRUE; } #if wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE if ( GetTree()->IsItemChecked(item) ) #else if ( ::IsItemSelected(GetHwndOf(GetTree()), HITEM(item)) ) #endif { m_selections.Add(item); } return TRUE; } size_t GetCount() const { return m_selections.GetCount(); } private: wxArrayTreeItemIds& m_selections; }; // internal class for counting tree items class TraverseCounter : public wxTreeTraversal { public: TraverseCounter(const wxTreeCtrl *tree, const wxTreeItemId& root, bool recursively) : wxTreeTraversal(tree) { m_count = 0; DoTraverse(root, recursively); } virtual bool OnVisit(const wxTreeItemId& WXUNUSED(item)) { m_count++; return TRUE; } size_t GetCount() const { return m_count; } private: size_t m_count; }; // ---------------------------------------------------------------------------- // This class is needed for support of different images: the Win32 common // control natively supports only 2 images (the normal one and another for the // selected state). We wish to provide support for 2 more of them for folder // items (i.e. those which have children): for expanded state and for expanded // selected state. For this we use this structure to store the additional items // images. // // There is only one problem with this: when we retrieve the item's data, we // don't know whether we get a pointer to wxTreeItemData or // wxTreeItemIndirectData. So we always set the item id to an invalid value // in this class and the code using the client data checks for it and retrieves // the real client data in this case. // ---------------------------------------------------------------------------- class wxTreeItemIndirectData : public wxTreeItemData { public: // ctor associates this data with the item and the real item data becomes // available through our GetData() method wxTreeItemIndirectData(wxTreeCtrl *tree, const wxTreeItemId& item) { for ( size_t n = 0; n < WXSIZEOF(m_images); n++ ) { m_images[n] = -1; } // save the old data m_data = tree->GetItemData(item); // and set ourselves as the new one tree->SetIndirectItemData(item, this); // we must have the invalid value for the item m_pItem = 0l; } // dtor deletes the associated data as well virtual ~wxTreeItemIndirectData() { delete m_data; } // accessors // get the real data associated with the item wxTreeItemData *GetData() const { return m_data; } // change it void SetData(wxTreeItemData *data) { m_data = data; } // do we have such image? bool HasImage(wxTreeItemIcon which) const { return m_images[which] != -1; } // get image int GetImage(wxTreeItemIcon which) const { return m_images[which]; } // change it void SetImage(int image, wxTreeItemIcon which) { m_images[which] = image; } private: // all the images associated with the item int m_images[wxTreeItemIcon_Max]; // the real client data wxTreeItemData *m_data; DECLARE_NO_COPY_CLASS(wxTreeItemIndirectData) }; // ---------------------------------------------------------------------------- // wxWin macros // ---------------------------------------------------------------------------- IMPLEMENT_DYNAMIC_CLASS(wxTreeCtrl, wxControl) // ---------------------------------------------------------------------------- // constants // ---------------------------------------------------------------------------- // indices in gs_expandEvents table below enum { IDX_COLLAPSE, IDX_EXPAND, IDX_WHAT_MAX }; enum { IDX_DONE, IDX_DOING, IDX_HOW_MAX }; // handy table for sending events - it has to be initialized during run-time // now so can't be const any more static /* const */ wxEventType gs_expandEvents[IDX_WHAT_MAX][IDX_HOW_MAX]; /* but logically it's a const table with the following entries: = { { wxEVT_COMMAND_TREE_ITEM_COLLAPSED, wxEVT_COMMAND_TREE_ITEM_COLLAPSING }, { wxEVT_COMMAND_TREE_ITEM_EXPANDED, wxEVT_COMMAND_TREE_ITEM_EXPANDING } }; */ // ============================================================================ // implementation // ============================================================================ // ---------------------------------------------------------------------------- // tree traversal // ---------------------------------------------------------------------------- bool wxTreeTraversal::DoTraverse(const wxTreeItemId& root, bool recursively) { if ( !OnVisit(root) ) return FALSE; return Traverse(root, recursively); } bool wxTreeTraversal::Traverse(const wxTreeItemId& root, bool recursively) { long cookie; wxTreeItemId child = m_tree->GetFirstChild(root, cookie); while ( child.IsOk() ) { // depth first traversal if ( recursively && !Traverse(child, TRUE) ) return FALSE; if ( !OnVisit(child) ) return FALSE; child = m_tree->GetNextChild(root, cookie); } return TRUE; } // ---------------------------------------------------------------------------- // construction and destruction // ---------------------------------------------------------------------------- void wxTreeCtrl::Init() { m_imageListNormal = NULL; m_imageListState = NULL; m_ownsImageListNormal = m_ownsImageListState = FALSE; m_textCtrl = NULL; m_hasAnyAttr = FALSE; m_dragImage = NULL; m_htSelStart = 0; m_pVirtualRoot = NULL; // initialize the global array of events now as it can't be done statically // with the wxEVT_XXX values being allocated during run-time only gs_expandEvents[IDX_COLLAPSE][IDX_DONE] = wxEVT_COMMAND_TREE_ITEM_COLLAPSED; gs_expandEvents[IDX_COLLAPSE][IDX_DOING] = wxEVT_COMMAND_TREE_ITEM_COLLAPSING; gs_expandEvents[IDX_EXPAND][IDX_DONE] = wxEVT_COMMAND_TREE_ITEM_EXPANDED; gs_expandEvents[IDX_EXPAND][IDX_DOING] = wxEVT_COMMAND_TREE_ITEM_EXPANDING; } bool wxTreeCtrl::Create(wxWindow *parent, wxWindowID id, const wxPoint& pos, const wxSize& size, long style, const wxValidator& validator, const wxString& name) { Init(); if ( !CreateControl(parent, id, pos, size, style, validator, name) ) return FALSE; DWORD wstyle = WS_VISIBLE | WS_CHILD | WS_TABSTOP | TVS_SHOWSELALWAYS; if ( m_windowStyle & wxCLIP_SIBLINGS ) wstyle |= WS_CLIPSIBLINGS; if ((m_windowStyle & wxTR_NO_LINES) == 0) wstyle |= TVS_HASLINES; if ( m_windowStyle & wxTR_HAS_BUTTONS ) wstyle |= TVS_HASBUTTONS; if ( m_windowStyle & wxTR_EDIT_LABELS ) wstyle |= TVS_EDITLABELS; if ( m_windowStyle & wxTR_LINES_AT_ROOT ) wstyle |= TVS_LINESATROOT; if ( m_windowStyle & wxTR_FULL_ROW_HIGHLIGHT ) { if ( wxTheApp->GetComCtl32Version() >= 471 ) wstyle |= TVS_FULLROWSELECT; } // using TVS_CHECKBOXES for emulation of a multiselection tree control // doesn't work without the new enough headers #if wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE && \ !defined( __GNUWIN32_OLD__ ) && \ !defined( __BORLANDC__ ) && \ !defined( __WATCOMC__ ) && \ (!defined(__VISUALC__) || (__VISUALC__ > 1010)) // we emulate the multiple selection tree controls by using checkboxes: set // up the image list we need for this if we do have multiple selections if ( m_windowStyle & wxTR_MULTIPLE ) wstyle |= TVS_CHECKBOXES; #endif // wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE // Create the tree control. if ( !MSWCreateControl(WC_TREEVIEW, wstyle) ) 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 // VZ: this is some experimental code which may be used to get the // TVS_CHECKBOXES style functionality for comctl32.dll < 4.71. // AFAIK, the standard DLL does about the same thing anyhow. #if 0 if ( m_windowStyle & wxTR_MULTIPLE ) { wxBitmap bmp; // create the DC compatible with the current screen HDC hdcMem = CreateCompatibleDC(NULL); // create a mono bitmap of the standard size int x = GetSystemMetrics(SM_CXMENUCHECK); int y = GetSystemMetrics(SM_CYMENUCHECK); wxImageList imagelistCheckboxes(x, y, FALSE, 2); HBITMAP hbmpCheck = CreateBitmap(x, y, // bitmap size 1, // # of color planes 1, // # bits needed for one pixel 0); // array containing colour data SelectObject(hdcMem, hbmpCheck); // then draw a check mark into it RECT rect = { 0, 0, x, y }; if ( !::DrawFrameControl(hdcMem, &rect, DFC_BUTTON, DFCS_BUTTONCHECK | DFCS_CHECKED) ) { wxLogLastError(wxT("DrawFrameControl(check)")); } bmp.SetHBITMAP((WXHBITMAP)hbmpCheck); imagelistCheckboxes.Add(bmp); if ( !::DrawFrameControl(hdcMem, &rect, DFC_BUTTON, DFCS_BUTTONCHECK) ) { wxLogLastError(wxT("DrawFrameControl(uncheck)")); } bmp.SetHBITMAP((WXHBITMAP)hbmpCheck); imagelistCheckboxes.Add(bmp); // clean up ::DeleteDC(hdcMem); // set the imagelist SetStateImageList(&imagelistCheckboxes); } #endif // 0 SetSize(pos.x, pos.y, size.x, size.y); return TRUE; } wxTreeCtrl::~wxTreeCtrl() { // delete any attributes if ( m_hasAnyAttr ) { for ( wxNode *node = m_attrs.Next(); node; node = m_attrs.Next() ) { delete (wxTreeItemAttr *)node->Data(); } // prevent TVN_DELETEITEM handler from deleting the attributes again! m_hasAnyAttr = FALSE; } DeleteTextCtrl(); // delete user data to prevent memory leaks // also deletes hidden root node storage. DeleteAllItems(); if (m_ownsImageListNormal) delete m_imageListNormal; if (m_ownsImageListState) delete m_imageListState; } // ---------------------------------------------------------------------------- // accessors // ---------------------------------------------------------------------------- // simple wrappers which add error checking in debug mode bool wxTreeCtrl::DoGetItem(wxTreeViewItem* tvItem) const { wxCHECK_MSG( tvItem->hItem != TVI_ROOT, FALSE, _T("can't retrieve virtual root item") ); if ( !TreeView_GetItem(GetHwnd(), tvItem) ) { wxLogLastError(wxT("TreeView_GetItem")); return FALSE; } return TRUE; } void wxTreeCtrl::DoSetItem(wxTreeViewItem* tvItem) { if ( TreeView_SetItem(GetHwnd(), tvItem) == -1 ) { wxLogLastError(wxT("TreeView_SetItem")); } } size_t wxTreeCtrl::GetCount() const { return (size_t)TreeView_GetCount(GetHwnd()); } unsigned int wxTreeCtrl::GetIndent() const { return TreeView_GetIndent(GetHwnd()); } void wxTreeCtrl::SetIndent(unsigned int indent) { TreeView_SetIndent(GetHwnd(), indent); } wxImageList *wxTreeCtrl::GetImageList() const { return m_imageListNormal; } wxImageList *wxTreeCtrl::GetStateImageList() const { return m_imageListNormal; } void wxTreeCtrl::SetAnyImageList(wxImageList *imageList, int which) { // no error return TreeView_SetImageList(GetHwnd(), imageList ? imageList->GetHIMAGELIST() : 0, which); } void wxTreeCtrl::SetImageList(wxImageList *imageList) { if (m_ownsImageListNormal) delete m_imageListNormal; SetAnyImageList(m_imageListNormal = imageList, TVSIL_NORMAL); m_ownsImageListNormal = FALSE; } void wxTreeCtrl::SetStateImageList(wxImageList *imageList) { if (m_ownsImageListState) delete m_imageListState; SetAnyImageList(m_imageListState = imageList, TVSIL_STATE); m_ownsImageListState = FALSE; } void wxTreeCtrl::AssignImageList(wxImageList *imageList) { SetImageList(imageList); m_ownsImageListNormal = TRUE; } void wxTreeCtrl::AssignStateImageList(wxImageList *imageList) { SetStateImageList(imageList); m_ownsImageListState = TRUE; } size_t wxTreeCtrl::GetChildrenCount(const wxTreeItemId& item, bool recursively) const { TraverseCounter counter(this, item, recursively); return counter.GetCount() - 1; } // ---------------------------------------------------------------------------- // control colours // ---------------------------------------------------------------------------- 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; } // ---------------------------------------------------------------------------- // Item access // ---------------------------------------------------------------------------- wxString wxTreeCtrl::GetItemText(const wxTreeItemId& item) const { wxChar buf[512]; // the size is arbitrary... wxTreeViewItem tvItem(item, TVIF_TEXT); tvItem.pszText = buf; tvItem.cchTextMax = WXSIZEOF(buf); if ( !DoGetItem(&tvItem) ) { // don't return some garbage which was on stack, but an empty string buf[0] = wxT('\0'); } return wxString(buf); } void wxTreeCtrl::SetItemText(const wxTreeItemId& item, const wxString& text) { if ( IS_VIRTUAL_ROOT(item) ) return; wxTreeViewItem tvItem(item, TVIF_TEXT); tvItem.pszText = (wxChar *)text.c_str(); // conversion is ok DoSetItem(&tvItem); // when setting the text of the item being edited, the text control should // be updated to reflect the new text as well, otherwise calling // SetItemText() in the OnBeginLabelEdit() handler doesn't have any effect // // don't use GetEditControl() here because m_textCtrl is not set yet HWND hwndEdit = TreeView_GetEditControl(GetHwnd()); if ( hwndEdit ) { if ( item == GetSelection() ) { ::SetWindowText(hwndEdit, text); } } } int wxTreeCtrl::DoGetItemImageFromData(const wxTreeItemId& item, wxTreeItemIcon which) const { wxTreeViewItem tvItem(item, TVIF_PARAM); if ( !DoGetItem(&tvItem) ) { return -1; } return ((wxTreeItemIndirectData *)tvItem.lParam)->GetImage(which); } void wxTreeCtrl::DoSetItemImageFromData(const wxTreeItemId& item, int image, wxTreeItemIcon which) const { wxTreeViewItem tvItem(item, TVIF_PARAM); if ( !DoGetItem(&tvItem) ) { return; } wxTreeItemIndirectData *data = ((wxTreeItemIndirectData *)tvItem.lParam); data->SetImage(image, which); // make sure that we have selected images as well if ( which == wxTreeItemIcon_Normal && !data->HasImage(wxTreeItemIcon_Selected) ) { data->SetImage(image, wxTreeItemIcon_Selected); } if ( which == wxTreeItemIcon_Expanded && !data->HasImage(wxTreeItemIcon_SelectedExpanded) ) { data->SetImage(image, wxTreeItemIcon_SelectedExpanded); } } void wxTreeCtrl::DoSetItemImages(const wxTreeItemId& item, int image, int imageSel) { wxTreeViewItem tvItem(item, TVIF_IMAGE | TVIF_SELECTEDIMAGE); tvItem.iSelectedImage = imageSel; tvItem.iImage = image; DoSetItem(&tvItem); } int wxTreeCtrl::GetItemImage(const wxTreeItemId& item, wxTreeItemIcon which) const { if ( (HITEM(item) == TVI_ROOT) && (m_windowStyle & wxTR_HIDE_ROOT) ) { // TODO: Maybe a hidden root can still provide images? return -1; } if ( HasIndirectData(item) ) { return DoGetItemImageFromData(item, which); } UINT mask; switch ( which ) { default: wxFAIL_MSG( wxT("unknown tree item image type") ); case wxTreeItemIcon_Normal: mask = TVIF_IMAGE; break; case wxTreeItemIcon_Selected: mask = TVIF_SELECTEDIMAGE; break; case wxTreeItemIcon_Expanded: case wxTreeItemIcon_SelectedExpanded: return -1; } wxTreeViewItem tvItem(item, mask); DoGetItem(&tvItem); return mask == TVIF_IMAGE ? tvItem.iImage : tvItem.iSelectedImage; } void wxTreeCtrl::SetItemImage(const wxTreeItemId& item, int image, wxTreeItemIcon which) { if ( IS_VIRTUAL_ROOT(item) ) { // TODO: Maybe a hidden root can still store images? return; } int imageNormal, imageSel; switch ( which ) { default: wxFAIL_MSG( wxT("unknown tree item image type") ); case wxTreeItemIcon_Normal: imageNormal = image; imageSel = GetItemSelectedImage(item); break; case wxTreeItemIcon_Selected: imageNormal = GetItemImage(item); imageSel = image; break; case wxTreeItemIcon_Expanded: case wxTreeItemIcon_SelectedExpanded: if ( !HasIndirectData(item) ) { // we need to get the old images first, because after we create // the wxTreeItemIndirectData GetItemXXXImage() will use it to // get the images imageNormal = GetItemImage(item); imageSel = GetItemSelectedImage(item); // if it doesn't have it yet, add it wxTreeItemIndirectData *data = new wxTreeItemIndirectData(this, item); // copy the data to the new location data->SetImage(imageNormal, wxTreeItemIcon_Normal); data->SetImage(imageSel, wxTreeItemIcon_Selected); } DoSetItemImageFromData(item, image, which); // reset the normal/selected images because we won't use them any // more - now they're stored inside the indirect data imageNormal = imageSel = I_IMAGECALLBACK; break; } // NB: at least in version 5.00.0518.9 of comctl32.dll we need to always // change both normal and selected image - otherwise the change simply // doesn't take place! DoSetItemImages(item, imageNormal, imageSel); } wxTreeItemData *wxTreeCtrl::GetItemData(const wxTreeItemId& item) const { wxTreeViewItem tvItem(item, TVIF_PARAM); // Hidden root may have data. if ( IS_VIRTUAL_ROOT(item) ) { return GET_VIRTUAL_ROOT()->GetData(); } // Visible node. if ( !DoGetItem(&tvItem) ) { return NULL; } wxTreeItemData *data = (wxTreeItemData *)tvItem.lParam; if ( IsDataIndirect(data) ) { data = ((wxTreeItemIndirectData *)data)->GetData(); } return data; } void wxTreeCtrl::SetItemData(const wxTreeItemId& item, wxTreeItemData *data) { if ( IS_VIRTUAL_ROOT(item) ) { GET_VIRTUAL_ROOT()->SetData(data); } // first, associate this piece of data with this item if ( data ) { data->SetId(item); } wxTreeViewItem tvItem(item, TVIF_PARAM); if ( HasIndirectData(item) ) { if ( DoGetItem(&tvItem) ) { ((wxTreeItemIndirectData *)tvItem.lParam)->SetData(data); } else { wxFAIL_MSG( wxT("failed to change tree items data") ); } } else { tvItem.lParam = (LPARAM)data; DoSetItem(&tvItem); } } void wxTreeCtrl::SetIndirectItemData(const wxTreeItemId& item, wxTreeItemIndirectData *data) { // this should never happen because it's unnecessary and will probably lead // to crash too because the code elsewhere supposes that the pointer the // wxTreeItemIndirectData has is a real wxItemData and not // wxTreeItemIndirectData as well wxASSERT_MSG( !HasIndirectData(item), wxT("setting indirect data twice?") ); SetItemData(item, data); } bool wxTreeCtrl::HasIndirectData(const wxTreeItemId& item) const { // query the item itself wxTreeViewItem tvItem(item, TVIF_PARAM); if ( !DoGetItem(&tvItem) ) { return FALSE; } wxTreeItemData *data = (wxTreeItemData *)tvItem.lParam; return data && IsDataIndirect(data); } void wxTreeCtrl::SetItemHasChildren(const wxTreeItemId& item, bool has) { if ( IS_VIRTUAL_ROOT(item) ) return; wxTreeViewItem tvItem(item, TVIF_CHILDREN); tvItem.cChildren = (int)has; DoSetItem(&tvItem); } void wxTreeCtrl::SetItemBold(const wxTreeItemId& item, bool bold) { if ( IS_VIRTUAL_ROOT(item) ) return; wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_BOLD); tvItem.state = bold ? TVIS_BOLD : 0; DoSetItem(&tvItem); } void wxTreeCtrl::SetItemDropHighlight(const wxTreeItemId& item, bool highlight) { if ( IS_VIRTUAL_ROOT(item) ) return; wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_DROPHILITED); tvItem.state = highlight ? TVIS_DROPHILITED : 0; DoSetItem(&tvItem); } void wxTreeCtrl::RefreshItem(const wxTreeItemId& item) { if ( IS_VIRTUAL_ROOT(item) ) return; wxRect rect; if ( GetBoundingRect(item, rect) ) { RefreshRect(rect); } } wxColour wxTreeCtrl::GetItemTextColour(const wxTreeItemId& item) const { long id = (long)(WXHTREEITEM)item; wxTreeItemAttr *attr = (wxTreeItemAttr *)m_attrs.Get(id); if ( !attr ) { return wxNullColour; } return attr->GetTextColour(); } wxColour wxTreeCtrl::GetItemBackgroundColour(const wxTreeItemId& item) const { long id = (long)(WXHTREEITEM)item; wxTreeItemAttr *attr = (wxTreeItemAttr *)m_attrs.Get(id); if ( !attr ) { return wxNullColour; } return attr->GetBackgroundColour(); } wxFont wxTreeCtrl::GetItemFont(const wxTreeItemId& item) const { long id = (long)(WXHTREEITEM)item; wxTreeItemAttr *attr = (wxTreeItemAttr *)m_attrs.Get(id); if ( !attr ) { return wxNullFont; } return attr->GetFont(); } void wxTreeCtrl::SetItemTextColour(const wxTreeItemId& item, const wxColour& col) { m_hasAnyAttr = TRUE; long id = (long)(WXHTREEITEM)item; wxTreeItemAttr *attr = (wxTreeItemAttr *)m_attrs.Get(id); if ( !attr ) { attr = new wxTreeItemAttr; m_attrs.Put(id, (wxObject *)attr); } attr->SetTextColour(col); RefreshItem(item); } void wxTreeCtrl::SetItemBackgroundColour(const wxTreeItemId& item, const wxColour& col) { m_hasAnyAttr = TRUE; long id = (long)(WXHTREEITEM)item; wxTreeItemAttr *attr = (wxTreeItemAttr *)m_attrs.Get(id); if ( !attr ) { attr = new wxTreeItemAttr; m_attrs.Put(id, (wxObject *)attr); } attr->SetBackgroundColour(col); RefreshItem(item); } void wxTreeCtrl::SetItemFont(const wxTreeItemId& item, const wxFont& font) { m_hasAnyAttr = TRUE; long id = (long)(WXHTREEITEM)item; wxTreeItemAttr *attr = (wxTreeItemAttr *)m_attrs.Get(id); if ( !attr ) { attr = new wxTreeItemAttr; m_attrs.Put(id, (wxObject *)attr); } attr->SetFont(font); RefreshItem(item); } // ---------------------------------------------------------------------------- // Item status // ---------------------------------------------------------------------------- bool wxTreeCtrl::IsVisible(const wxTreeItemId& item) const { if ( item == wxTreeItemId(TVI_ROOT) ) { // virtual (hidden) root is never visible return FALSE; } // 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 *(WXHTREEITEM *)&rect = (WXHTREEITEM)item; // FALSE means get item rect for the whole item, not only text return SendMessage(GetHwnd(), TVM_GETITEMRECT, FALSE, (LPARAM)&rect) != 0; } bool wxTreeCtrl::ItemHasChildren(const wxTreeItemId& item) const { wxTreeViewItem tvItem(item, TVIF_CHILDREN); DoGetItem(&tvItem); return tvItem.cChildren != 0; } bool wxTreeCtrl::IsExpanded(const wxTreeItemId& item) const { // probably not a good idea to put it here //wxASSERT( ItemHasChildren(item) ); wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_EXPANDED); DoGetItem(&tvItem); return (tvItem.state & TVIS_EXPANDED) != 0; } bool wxTreeCtrl::IsSelected(const wxTreeItemId& item) const { wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_SELECTED); DoGetItem(&tvItem); return (tvItem.state & TVIS_SELECTED) != 0; } bool wxTreeCtrl::IsBold(const wxTreeItemId& item) const { wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_BOLD); DoGetItem(&tvItem); return (tvItem.state & TVIS_BOLD) != 0; } // ---------------------------------------------------------------------------- // navigation // ---------------------------------------------------------------------------- wxTreeItemId wxTreeCtrl::GetRootItem() const { // Root may be real (visible) or virtual (hidden). if ( GET_VIRTUAL_ROOT() ) return TVI_ROOT; return wxTreeItemId((WXHTREEITEM) TreeView_GetRoot(GetHwnd())); } wxTreeItemId wxTreeCtrl::GetSelection() const { wxCHECK_MSG( !(m_windowStyle & wxTR_MULTIPLE), (long)(WXHTREEITEM)0, wxT("this only works with single selection controls") ); return wxTreeItemId((WXHTREEITEM) TreeView_GetSelection(GetHwnd())); } wxTreeItemId wxTreeCtrl::GetItemParent(const wxTreeItemId& item) const { HTREEITEM hItem; if ( IS_VIRTUAL_ROOT(item) ) { // no parent for the virtual root hItem = 0; } else // normal item { hItem = TreeView_GetParent(GetHwnd(), HITEM(item)); if ( !hItem && HasFlag(wxTR_HIDE_ROOT) ) { // the top level items should have the virtual root as their parent hItem = TVI_ROOT; } } return wxTreeItemId((WXHTREEITEM)hItem); } wxTreeItemId wxTreeCtrl::GetFirstChild(const wxTreeItemId& item, long& _cookie) const { // remember the last child returned in 'cookie' _cookie = (long)TreeView_GetChild(GetHwnd(), HITEM(item)); return wxTreeItemId((WXHTREEITEM)_cookie); } wxTreeItemId wxTreeCtrl::GetNextChild(const wxTreeItemId& WXUNUSED(item), long& _cookie) const { wxTreeItemId l = wxTreeItemId((WXHTREEITEM)TreeView_GetNextSibling(GetHwnd(), HITEM(_cookie))); _cookie = (long)l; return l; } wxTreeItemId wxTreeCtrl::GetLastChild(const wxTreeItemId& item) const { // can this be done more efficiently? long cookie; wxTreeItemId childLast, child = GetFirstChild(item, cookie); while ( child.IsOk() ) { childLast = child; child = GetNextChild(item, cookie); } return childLast; } wxTreeItemId wxTreeCtrl::GetNextSibling(const wxTreeItemId& item) const { return wxTreeItemId((WXHTREEITEM) TreeView_GetNextSibling(GetHwnd(), HITEM(item))); } wxTreeItemId wxTreeCtrl::GetPrevSibling(const wxTreeItemId& item) const { return wxTreeItemId((WXHTREEITEM) TreeView_GetPrevSibling(GetHwnd(), HITEM(item))); } wxTreeItemId wxTreeCtrl::GetFirstVisibleItem() const { return wxTreeItemId((WXHTREEITEM) TreeView_GetFirstVisible(GetHwnd())); } wxTreeItemId wxTreeCtrl::GetNextVisible(const wxTreeItemId& item) const { wxASSERT_MSG( IsVisible(item), wxT("The item you call GetNextVisible() for must be visible itself!")); return wxTreeItemId((WXHTREEITEM) TreeView_GetNextVisible(GetHwnd(), HITEM(item))); } wxTreeItemId wxTreeCtrl::GetPrevVisible(const wxTreeItemId& item) const { wxASSERT_MSG( IsVisible(item), wxT("The item you call GetPrevVisible() for must be visible itself!")); return wxTreeItemId((WXHTREEITEM) TreeView_GetPrevVisible(GetHwnd(), HITEM(item))); } // ---------------------------------------------------------------------------- // multiple selections emulation // ---------------------------------------------------------------------------- bool wxTreeCtrl::IsItemChecked(const wxTreeItemId& item) const { // receive the desired information. wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_STATEIMAGEMASK); DoGetItem(&tvItem); // state image indices are 1 based return ((tvItem.state >> 12) - 1) == 1; } void wxTreeCtrl::SetItemCheck(const wxTreeItemId& item, bool check) { // receive the desired information. wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_STATEIMAGEMASK); DoGetItem(&tvItem); // state images are one-based tvItem.state = (check ? 2 : 1) << 12; DoSetItem(&tvItem); } size_t wxTreeCtrl::GetSelections(wxArrayTreeItemIds& selections) const { TraverseSelections selector(this, selections); return selector.GetCount(); } // ---------------------------------------------------------------------------- // Usual operations // ---------------------------------------------------------------------------- wxTreeItemId wxTreeCtrl::DoInsertItem(const wxTreeItemId& parent, wxTreeItemId hInsertAfter, const wxString& text, int image, int selectedImage, wxTreeItemData *data) { wxCHECK_MSG( parent.IsOk() || !TreeView_GetRoot(GetHwnd()), wxTreeItemId(), _T("can't have more than one root in the tree") ); TV_INSERTSTRUCT tvIns; tvIns.hParent = HITEM(parent); tvIns.hInsertAfter = HITEM(hInsertAfter); // this is how we insert the item as the first child: supply a NULL // hInsertAfter if ( !tvIns.hInsertAfter ) { tvIns.hInsertAfter = TVI_FIRST; } UINT mask = 0; if ( !text.IsEmpty() ) { mask |= TVIF_TEXT; tvIns.item.pszText = (wxChar *)text.c_str(); // cast is ok } else { tvIns.item.pszText = NULL; tvIns.item.cchTextMax = 0; } if ( image != -1 ) { mask |= TVIF_IMAGE; tvIns.item.iImage = image; if ( selectedImage == -1 ) { // take the same image for selected icon if not specified selectedImage = image; } } if ( selectedImage != -1 ) { mask |= TVIF_SELECTEDIMAGE; tvIns.item.iSelectedImage = selectedImage; } if ( data != NULL ) { mask |= TVIF_PARAM; tvIns.item.lParam = (LPARAM)data; } tvIns.item.mask = mask; HTREEITEM id = (HTREEITEM) TreeView_InsertItem(GetHwnd(), &tvIns); if ( id == 0 ) { wxLogLastError(wxT("TreeView_InsertItem")); } if ( data != NULL ) { // associate the application tree item with Win32 tree item handle data->SetId((WXHTREEITEM)id); } return wxTreeItemId((WXHTREEITEM)id); } // for compatibility only wxTreeItemId wxTreeCtrl::InsertItem(const wxTreeItemId& parent, const wxString& text, int image, int selImage, long insertAfter) { return DoInsertItem(parent, (WXHTREEITEM)insertAfter, text, image, selImage, NULL); } wxTreeItemId wxTreeCtrl::AddRoot(const wxString& text, int image, int selectedImage, wxTreeItemData *data) { if ( m_windowStyle & wxTR_HIDE_ROOT ) { // create a virtual root item, the parent for all the others m_pVirtualRoot = new wxVirtualNode(data); return TVI_ROOT; } return DoInsertItem(wxTreeItemId((long)(WXHTREEITEM) 0), (long)(WXHTREEITEM) 0, text, image, selectedImage, data); } wxTreeItemId wxTreeCtrl::PrependItem(const wxTreeItemId& parent, const wxString& text, int image, int selectedImage, wxTreeItemData *data) { return DoInsertItem(parent, (WXHTREEITEM) TVI_FIRST, text, image, selectedImage, data); } wxTreeItemId wxTreeCtrl::InsertItem(const wxTreeItemId& parent, const wxTreeItemId& idPrevious, const wxString& text, int image, int selectedImage, wxTreeItemData *data) { return DoInsertItem(parent, idPrevious, text, image, selectedImage, data); } wxTreeItemId wxTreeCtrl::InsertItem(const wxTreeItemId& parent, size_t index, const wxString& text, int image, int selectedImage, wxTreeItemData *data) { // find the item from index long cookie; wxTreeItemId idPrev, idCur = GetFirstChild(parent, cookie); while ( index != 0 && idCur.IsOk() ) { index--; idPrev = idCur; idCur = GetNextChild(parent, cookie); } // assert, not check: if the index is invalid, we will append the item // to the end wxASSERT_MSG( index == 0, _T("bad index in wxTreeCtrl::InsertItem") ); return DoInsertItem(parent, idPrev, text, image, selectedImage, data); } wxTreeItemId wxTreeCtrl::AppendItem(const wxTreeItemId& parent, const wxString& text, int image, int selectedImage, wxTreeItemData *data) { return DoInsertItem(parent, (WXHTREEITEM) TVI_LAST, text, image, selectedImage, data); } void wxTreeCtrl::Delete(const wxTreeItemId& item) { if ( !TreeView_DeleteItem(GetHwnd(), HITEM(item)) ) { wxLogLastError(wxT("TreeView_DeleteItem")); } } // delete all children (but don't delete the item itself) void wxTreeCtrl::DeleteChildren(const wxTreeItemId& item) { long cookie; wxArrayLong children; wxTreeItemId child = GetFirstChild(item, cookie); while ( child.IsOk() ) { children.Add((long)(WXHTREEITEM)child); child = GetNextChild(item, cookie); } size_t nCount = children.Count(); for ( size_t n = 0; n < nCount; n++ ) { if ( !TreeView_DeleteItem(GetHwnd(), (HTREEITEM)children[n]) ) { wxLogLastError(wxT("TreeView_DeleteItem")); } } } void wxTreeCtrl::DeleteAllItems() { // delete the "virtual" root item. if ( GET_VIRTUAL_ROOT() ) { delete GET_VIRTUAL_ROOT(); m_pVirtualRoot = NULL; } // and all the real items if ( !TreeView_DeleteAllItems(GetHwnd()) ) { wxLogLastError(wxT("TreeView_DeleteAllItems")); } } void wxTreeCtrl::DoExpand(const wxTreeItemId& item, int flag) { wxASSERT_MSG( flag == TVE_COLLAPSE || flag == (TVE_COLLAPSE | TVE_COLLAPSERESET) || flag == TVE_EXPAND || flag == TVE_TOGGLE, wxT("Unknown flag in wxTreeCtrl::DoExpand") ); // A hidden root can be neither expanded nor collapsed. wxCHECK_RET( !(m_windowStyle & wxTR_HIDE_ROOT) || (HITEM(item) != TVI_ROOT), wxT("Can't expand/collapse hidden root node!") ) // TreeView_Expand doesn't send TVN_ITEMEXPAND(ING) messages, so we must // emulate them. This behaviour has changed slightly with comctl32.dll // v 4.70 - now it does send them but only the first time. To maintain // compatible behaviour and also in order to not have surprises with the // future versions, don't rely on this and still do everything ourselves. // To avoid that the messages be sent twice when the item is expanded for // the first time we must clear TVIS_EXPANDEDONCE style manually. wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_EXPANDEDONCE); tvItem.state = 0; DoSetItem(&tvItem); if ( TreeView_Expand(GetHwnd(), HITEM(item), flag) != 0 ) { wxTreeEvent event(wxEVT_NULL, m_windowId); event.m_item = item; event.SetEventObject(this); // note that the {EXPAND|COLLAPS}ING event is sent by TreeView_Expand() // itself event.SetEventType(gs_expandEvents[IsExpanded(item) ? IDX_EXPAND : IDX_COLLAPSE] [IDX_DONE]); (void)GetEventHandler()->ProcessEvent(event); } //else: change didn't took place, so do nothing at all } void wxTreeCtrl::Expand(const wxTreeItemId& item) { DoExpand(item, TVE_EXPAND); } void wxTreeCtrl::Collapse(const wxTreeItemId& item) { DoExpand(item, TVE_COLLAPSE); } void wxTreeCtrl::CollapseAndReset(const wxTreeItemId& item) { DoExpand(item, TVE_COLLAPSE | TVE_COLLAPSERESET); } void wxTreeCtrl::Toggle(const wxTreeItemId& item) { DoExpand(item, TVE_TOGGLE); } void wxTreeCtrl::ExpandItem(const wxTreeItemId& item, int action) { DoExpand(item, action); } void wxTreeCtrl::Unselect() { wxASSERT_MSG( !(m_windowStyle & wxTR_MULTIPLE), wxT("doesn't make sense, may be you want UnselectAll()?") ); // just remove the selection SelectItem(wxTreeItemId((long) (WXHTREEITEM) 0)); } void wxTreeCtrl::UnselectAll() { if ( m_windowStyle & wxTR_MULTIPLE ) { wxArrayTreeItemIds selections; size_t count = GetSelections(selections); for ( size_t n = 0; n < count; n++ ) { #if wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE SetItemCheck(selections[n], FALSE); #else // !wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE ::UnselectItem(GetHwnd(), HITEM(selections[n])); #endif // wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE/!wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE } } else { // just remove the selection Unselect(); } } void wxTreeCtrl::SelectItem(const wxTreeItemId& item) { if ( m_windowStyle & wxTR_MULTIPLE ) { #if wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE // selecting the item means checking it SetItemCheck(item); #else // !wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE ::SelectItem(GetHwnd(), HITEM(item)); #endif // wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE/!wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE } else { // 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 wxTreeEvent event(wxEVT_NULL, m_windowId); event.m_item = item; event.SetEventObject(this); event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGING); if ( !GetEventHandler()->ProcessEvent(event) || event.IsAllowed() ) { if ( !TreeView_SelectItem(GetHwnd(), HITEM(item)) ) { wxLogLastError(wxT("TreeView_SelectItem")); } else { event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGED); (void)GetEventHandler()->ProcessEvent(event); } } //else: program vetoed the change } } void wxTreeCtrl::EnsureVisible(const wxTreeItemId& item) { // no error return TreeView_EnsureVisible(GetHwnd(), HITEM(item)); } void wxTreeCtrl::ScrollTo(const wxTreeItemId& item) { if ( !TreeView_SelectSetFirstVisible(GetHwnd(), HITEM(item)) ) { wxLogLastError(wxT("TreeView_SelectSetFirstVisible")); } } wxTextCtrl *wxTreeCtrl::GetEditControl() const { return m_textCtrl; } void wxTreeCtrl::DeleteTextCtrl() { if ( m_textCtrl ) { // the HWND corresponding to this control is deleted by the tree // control itself and we don't know when exactly this happens, so check // if the window still exists before calling UnsubclassWin() if ( !::IsWindow(GetHwndOf(m_textCtrl)) ) { m_textCtrl->SetHWND(0); } m_textCtrl->UnsubclassWin(); m_textCtrl->SetHWND(0); delete m_textCtrl; m_textCtrl = NULL; } } wxTextCtrl* wxTreeCtrl::EditLabel(const wxTreeItemId& item, wxClassInfo* textControlClass) { wxASSERT( textControlClass->IsKindOf(CLASSINFO(wxTextCtrl)) ); DeleteTextCtrl(); m_textCtrl = (wxTextCtrl *)textControlClass->CreateObject(); HWND hWnd = (HWND) TreeView_EditLabel(GetHwnd(), HITEM(item)); // this is not an error - the TVN_BEGINLABELEDIT handler might have // returned FALSE if ( !hWnd ) { delete m_textCtrl; m_textCtrl = NULL; return NULL; } // textctrl is subclassed in MSWOnNotify return m_textCtrl; } // End label editing, optionally cancelling the edit void wxTreeCtrl::EndEditLabel(const wxTreeItemId& WXUNUSED(item), bool discardChanges) { TreeView_EndEditLabelNow(GetHwnd(), discardChanges); DeleteTextCtrl(); } wxTreeItemId wxTreeCtrl::HitTest(const wxPoint& point, int& flags) { TV_HITTESTINFO hitTestInfo; hitTestInfo.pt.x = (int)point.x; hitTestInfo.pt.y = (int)point.y; TreeView_HitTest(GetHwnd(), &hitTestInfo); flags = 0; // avoid repetition #define TRANSLATE_FLAG(flag) if ( hitTestInfo.flags & TVHT_##flag ) \ flags |= wxTREE_HITTEST_##flag TRANSLATE_FLAG(ABOVE); TRANSLATE_FLAG(BELOW); TRANSLATE_FLAG(NOWHERE); TRANSLATE_FLAG(ONITEMBUTTON); TRANSLATE_FLAG(ONITEMICON); TRANSLATE_FLAG(ONITEMINDENT); TRANSLATE_FLAG(ONITEMLABEL); TRANSLATE_FLAG(ONITEMRIGHT); TRANSLATE_FLAG(ONITEMSTATEICON); TRANSLATE_FLAG(TOLEFT); TRANSLATE_FLAG(TORIGHT); #undef TRANSLATE_FLAG return wxTreeItemId((WXHTREEITEM) hitTestInfo.hItem); } bool wxTreeCtrl::GetBoundingRect(const wxTreeItemId& item, wxRect& rect, bool textOnly) const { RECT rc; if ( TreeView_GetItemRect(GetHwnd(), HITEM(item), &rc, textOnly) ) { rect = wxRect(wxPoint(rc.left, rc.top), wxPoint(rc.right, rc.bottom)); return TRUE; } else { // couldn't retrieve rect: for example, item isn't visible return FALSE; } } // ---------------------------------------------------------------------------- // sorting stuff // ---------------------------------------------------------------------------- // this is just a tiny namespace which is friend to wxTreeCtrl and so can use // functions such as IsDataIndirect() class wxTreeSortHelper { public: static int CALLBACK Compare(LPARAM data1, LPARAM data2, LPARAM tree); private: static wxTreeItemId GetIdFromData(wxTreeCtrl *tree, LPARAM item) { wxTreeItemData *data = (wxTreeItemData *)item; if ( tree->IsDataIndirect(data) ) { data = ((wxTreeItemIndirectData *)data)->GetData(); } return data->GetId(); } }; int CALLBACK wxTreeSortHelper::Compare(LPARAM pItem1, LPARAM pItem2, LPARAM htree) { wxCHECK_MSG( pItem1 && pItem2, 0, wxT("sorting tree without data doesn't make sense") ); wxTreeCtrl *tree = (wxTreeCtrl *)htree; return tree->OnCompareItems(GetIdFromData(tree, pItem1), GetIdFromData(tree, pItem2)); } int wxTreeCtrl::OnCompareItems(const wxTreeItemId& item1, const wxTreeItemId& item2) { return wxStrcmp(GetItemText(item1), GetItemText(item2)); } void wxTreeCtrl::SortChildren(const wxTreeItemId& item) { // rely on the fact that TreeView_SortChildren does the same thing as our // default behaviour, i.e. sorts items alphabetically and so call it // directly if we're not in derived class (much more efficient!) if ( GetClassInfo() == CLASSINFO(wxTreeCtrl) ) { TreeView_SortChildren(GetHwnd(), HITEM(item), 0); } else { TV_SORTCB tvSort; tvSort.hParent = HITEM(item); tvSort.lpfnCompare = wxTreeSortHelper::Compare; tvSort.lParam = (LPARAM)this; TreeView_SortChildrenCB(GetHwnd(), &tvSort, 0 /* reserved */); } } // ---------------------------------------------------------------------------- // implementation // ---------------------------------------------------------------------------- bool wxTreeCtrl::MSWCommand(WXUINT cmd, WXWORD id) { if ( cmd == EN_UPDATE ) { wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, id); event.SetEventObject( this ); ProcessCommand(event); } else if ( cmd == EN_KILLFOCUS ) { wxCommandEvent event(wxEVT_KILL_FOCUS, id); event.SetEventObject( this ); ProcessCommand(event); } else { // nothing done return FALSE; } // command processed return TRUE; } // we hook into WndProc to process WM_MOUSEMOVE/WM_BUTTONUP messages - as we // only do it during dragging, minimize wxWin overhead (this is important for // WM_MOUSEMOVE as they're a lot of them) by catching Windows messages directly // instead of passing by wxWin events long wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam) { bool processed = FALSE; long rc = 0; bool isMultiple = (GetWindowStyle() & wxTR_MULTIPLE) != 0; if ( (nMsg >= WM_MOUSEFIRST) && (nMsg <= WM_MOUSELAST) ) { // we only process mouse messages here and these parameters have the // same meaning for all of them int x = GET_X_LPARAM(lParam), y = GET_Y_LPARAM(lParam); HTREEITEM htItem = GetItemFromPoint(GetHwnd(), x, y); switch ( nMsg ) { case WM_RBUTTONDOWN: // if the item we are about to right click on // is not already select, remove the entire // previous selection if (!::IsItemSelected(GetHwnd(), htItem)) { UnselectAll(); } // select item and set the focus to the // newly selected item ::SelectItem(GetHwnd(), htItem); ::SetFocus(GetHwnd(), htItem); break; #if !wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE case WM_LBUTTONDOWN: if ( htItem && isMultiple ) { if ( wParam & MK_CONTROL ) { SetFocus(); // toggle selected state ToggleItemSelection(GetHwnd(), htItem); ::SetFocus(GetHwnd(), htItem); // reset on any click without Shift m_htSelStart = 0; processed = TRUE; } else if ( wParam & MK_SHIFT ) { // this selects all items between the starting one and // the current if ( !m_htSelStart ) { // take the focused item m_htSelStart = (WXHTREEITEM) TreeView_GetSelection(GetHwnd()); } SelectRange(GetHwnd(), HITEM(m_htSelStart), htItem, !(wParam & MK_CONTROL)); ::SetFocus(GetHwnd(), htItem); processed = TRUE; } else // normal click { // avoid doing anything if we click on the only // currently selected item wxArrayTreeItemIds selections; size_t count = GetSelections(selections); if ( count == 0 || count > 1 || HITEM(selections[0]) != htItem ) { // clear the previously selected items UnselectAll(); // prevent the click from starting in-place editing // which should only happen if we click on the // already selected item (and nothing else is // selected) TreeView_SelectItem(GetHwnd(), 0); } // reset on any click without Shift m_htSelStart = 0; } } break; #endif // wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE case WM_MOUSEMOVE: if ( m_dragImage ) { m_dragImage->Move(wxPoint(x, y)); if ( htItem ) { // highlight the item as target (hiding drag image is // necessary - otherwise the display will be corrupted) m_dragImage->Hide(); TreeView_SelectDropTarget(GetHwnd(), htItem); m_dragImage->Show(); } } break; case WM_LBUTTONUP: case WM_RBUTTONUP: if ( m_dragImage ) { m_dragImage->EndDrag(); delete m_dragImage; m_dragImage = NULL; // generate the drag end event wxTreeEvent event(wxEVT_COMMAND_TREE_END_DRAG, m_windowId); event.m_item = (WXHTREEITEM)htItem; event.m_pointDrag = wxPoint(x, y); event.SetEventObject(this); (void)GetEventHandler()->ProcessEvent(event); // 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); } break; } } #if !wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE else if ( (nMsg == WM_SETFOCUS || nMsg == WM_KILLFOCUS) && isMultiple ) { // the tree control greys out the selected item when it loses focus and // paints it as selected again when it regains it, but it won't do it // for the other items itself - help it wxArrayTreeItemIds selections; size_t count = GetSelections(selections); RECT rect; 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) ) { ::InvalidateRect(GetHwnd(), &rect, FALSE); } } } else if ( nMsg == WM_KEYDOWN && isMultiple ) { bool bCtrl = wxIsCtrlDown(), bShift = wxIsShiftDown(); // we handle.arrows and space, but not page up/down and home/end: the // latter should be easy, but not the former HTREEITEM htSel = (HTREEITEM)TreeView_GetSelection(GetHwnd()); if ( !m_htSelStart ) { m_htSelStart = (WXHTREEITEM)htSel; } if ( wParam == VK_SPACE ) { if ( bCtrl ) { ToggleItemSelection(GetHwnd(), htSel); } else { UnselectAll(); ::SelectItem(GetHwnd(), htSel); } processed = TRUE; } else if ( wParam == VK_UP || wParam == VK_DOWN ) { if ( !bCtrl && !bShift ) { // no modifiers, just clear selection and then let the default // processing to take place UnselectAll(); } else if ( htSel ) { (void)wxControl::MSWWindowProc(nMsg, wParam, lParam); HTREEITEM htNext = (HTREEITEM)(wParam == VK_UP ? TreeView_GetPrevVisible(GetHwnd(), htSel) : TreeView_GetNextVisible(GetHwnd(), htSel)); if ( !htNext ) { // at the top/bottom htNext = htSel; } if ( bShift ) { SelectRange(GetHwnd(), HITEM(m_htSelStart), htNext); } else // bCtrl { // without changing selection ::SetFocus(GetHwnd(), htNext); } processed = TRUE; } } } #endif // !wxUSE_CHECKBOXES_IN_MULTI_SEL_TREE else if ( nMsg == WM_CHAR ) { // don't let the control process Space and Return keys because it // doesn't do anything useful with them anyhow but always beeps // annoyingly when it receives them and there is no way to turn it off // simply if you just process TREEITEM_ACTIVATED event to which Space // and Enter presses are mapped in your code if ( wParam == VK_SPACE || wParam == VK_RETURN ) { processed = true; } } if ( !processed ) rc = wxControl::MSWWindowProc(nMsg, wParam, lParam); return rc; } // process WM_NOTIFY Windows message bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result) { wxTreeEvent event(wxEVT_NULL, m_windowId); wxEventType eventType = wxEVT_NULL; NMHDR *hdr = (NMHDR *)lParam; switch ( hdr->code ) { case TVN_BEGINDRAG: eventType = wxEVT_COMMAND_TREE_BEGIN_DRAG; // fall through case TVN_BEGINRDRAG: { if ( eventType == wxEVT_NULL ) eventType = wxEVT_COMMAND_TREE_BEGIN_RDRAG; //else: left drag, already set above NM_TREEVIEW *tv = (NM_TREEVIEW *)lParam; event.m_item = (WXHTREEITEM) tv->itemNew.hItem; event.m_pointDrag = wxPoint(tv->ptDrag.x, tv->ptDrag.y); // don't allow dragging by default: the user code must // explicitly say that it wants to allow it to avoid breaking // the old apps event.Veto(); } break; case TVN_BEGINLABELEDIT: { eventType = wxEVT_COMMAND_TREE_BEGIN_LABEL_EDIT; TV_DISPINFO *info = (TV_DISPINFO *)lParam; event.m_item = (WXHTREEITEM) info->item.hItem; event.m_label = info->item.pszText; event.m_editCancelled = FALSE; } break; case TVN_DELETEITEM: { eventType = wxEVT_COMMAND_TREE_DELETE_ITEM; NM_TREEVIEW *tv = (NM_TREEVIEW *)lParam; event.m_item = (WXHTREEITEM)tv->itemOld.hItem; if ( m_hasAnyAttr ) { delete (wxTreeItemAttr *)m_attrs. Delete((long)tv->itemOld.hItem); } } break; case TVN_ENDLABELEDIT: { eventType = wxEVT_COMMAND_TREE_END_LABEL_EDIT; TV_DISPINFO *info = (TV_DISPINFO *)lParam; event.m_item = (WXHTREEITEM)info->item.hItem; event.m_label = info->item.pszText; if (info->item.pszText == NULL) { event.m_editCancelled = TRUE; } else { event.m_editCancelled = FALSE; } break; } case TVN_GETDISPINFO: eventType = wxEVT_COMMAND_TREE_GET_INFO; // fall through case TVN_SETDISPINFO: { if ( eventType == wxEVT_NULL ) eventType = wxEVT_COMMAND_TREE_SET_INFO; //else: get, already set above TV_DISPINFO *info = (TV_DISPINFO *)lParam; event.m_item = (WXHTREEITEM) info->item.hItem; break; } case TVN_ITEMEXPANDING: case TVN_ITEMEXPANDED: { NM_TREEVIEW* tv = (NM_TREEVIEW*)lParam; int what; switch ( tv->action ) { default: wxLogDebug(wxT("unexpected code %d in TVN_ITEMEXPAND message"), tv->action); // fall through case TVE_EXPAND: what = IDX_EXPAND; break; case TVE_COLLAPSE: what = IDX_COLLAPSE; break; } int how = hdr->code == TVN_ITEMEXPANDING ? IDX_DOING : IDX_DONE; eventType = gs_expandEvents[what][how]; event.m_item = (WXHTREEITEM) tv->itemNew.hItem; } break; case TVN_KEYDOWN: { eventType = wxEVT_COMMAND_TREE_KEY_DOWN; TV_KEYDOWN *info = (TV_KEYDOWN *)lParam; // fabricate the lParam and wParam parameters sufficiently // similar to the ones from a "real" WM_KEYDOWN so that // CreateKeyEvent() works correctly WXLPARAM lParam = (::GetKeyState(VK_MENU) & 0x100 ? KF_ALTDOWN : 0) << 16; WXWPARAM wParam = info->wVKey; int keyCode = wxCharCodeMSWToWX(info->wVKey); if ( !keyCode ) { // wxCharCodeMSWToWX() returns 0 to indicate that this is a // simple ASCII key keyCode = wParam; } event.m_evtKey = CreateKeyEvent(wxEVT_KEY_DOWN, keyCode, lParam, wParam); // a separate event for Space/Return if ( !wxIsCtrlDown() && !wxIsShiftDown() && ((info->wVKey == VK_SPACE) || (info->wVKey == VK_RETURN)) ) { wxTreeEvent event2(wxEVT_COMMAND_TREE_ITEM_ACTIVATED, m_windowId); event2.SetEventObject(this); if ( !(GetWindowStyle() & wxTR_MULTIPLE) ) { event2.m_item = GetSelection(); } //else: don't know how to get it (void)GetEventHandler()->ProcessEvent(event2); } } break; // NB: MSLU is broken and sends TVN_SELCHANGEDA instead of // TVN_SELCHANGEDW in Unicode mode under Win98. Therefore // we have to handle both messages: case TVN_SELCHANGEDA: case TVN_SELCHANGEDW: eventType = wxEVT_COMMAND_TREE_SEL_CHANGED; // fall through case TVN_SELCHANGINGA: case TVN_SELCHANGINGW: { if ( eventType == wxEVT_NULL ) eventType = wxEVT_COMMAND_TREE_SEL_CHANGING; //else: already set above if (hdr->code == TVN_SELCHANGINGW || hdr->code == TVN_SELCHANGEDW) { NM_TREEVIEWW* tv = (NM_TREEVIEWW *)lParam; event.m_item = (WXHTREEITEM) tv->itemNew.hItem; event.m_itemOld = (WXHTREEITEM) tv->itemOld.hItem; } else { NM_TREEVIEWA* tv = (NM_TREEVIEWA *)lParam; event.m_item = (WXHTREEITEM) tv->itemNew.hItem; event.m_itemOld = (WXHTREEITEM) tv->itemOld.hItem; } } break; #if defined(_WIN32_IE) && _WIN32_IE >= 0x300 && !wxUSE_COMCTL32_SAFELY && !( defined(__GNUWIN32__) && !wxCHECK_W32API_VERSION( 1, 0 ) ) case NM_CUSTOMDRAW: { LPNMTVCUSTOMDRAW lptvcd = (LPNMTVCUSTOMDRAW)lParam; NMCUSTOMDRAW& nmcd = lptvcd->nmcd; switch ( nmcd.dwDrawStage ) { case CDDS_PREPAINT: // if we've got any items with non standard attributes, // notify us before painting each item *result = m_hasAnyAttr ? CDRF_NOTIFYITEMDRAW : CDRF_DODEFAULT; break; case CDDS_ITEMPREPAINT: { wxTreeItemAttr *attr = (wxTreeItemAttr *)m_attrs.Get(nmcd.dwItemSpec); if ( !attr ) { // nothing to do for this item *result = CDRF_DODEFAULT; break; } HFONT hFont; if ( attr->HasFont() ) { hFont = GetHfontOf(attr->GetFont()); } else { hFont = 0; } wxColour colText; if ( attr->HasTextColour() ) { colText = attr->GetTextColour(); } else { colText = GetForegroundColour(); } // selection colours should override ours if ( nmcd.uItemState & CDIS_SELECTED ) { lptvcd->clrTextBk = ::GetSysColor(COLOR_HIGHLIGHT); lptvcd->clrText = ::GetSysColor(COLOR_HIGHLIGHTTEXT); } else // !selected { wxColour colBack; if ( attr->HasBackgroundColour() ) { colBack = attr->GetBackgroundColour(); } else { colBack = GetBackgroundColour(); } lptvcd->clrText = wxColourToRGB(colText); lptvcd->clrTextBk = wxColourToRGB(colBack); } // note that if we wanted to set colours for // individual columns (subitems), we would have // returned CDRF_NOTIFYSUBITEMREDRAW from here if ( hFont ) { ::SelectObject(nmcd.hdc, hFont); *result = CDRF_NEWFONT; } else { *result = CDRF_DODEFAULT; } } break; default: *result = CDRF_DODEFAULT; } } // we always process it return TRUE; #endif // _WIN32_IE >= 0x300 case NM_DBLCLK: case NM_RCLICK: { TV_HITTESTINFO tvhti; ::GetCursorPos(&tvhti.pt); ::ScreenToClient(GetHwnd(), &tvhti.pt); if ( TreeView_HitTest(GetHwnd(), &tvhti) ) { if ( tvhti.flags & TVHT_ONITEM ) { event.m_item = (WXHTREEITEM) tvhti.hItem; eventType = (int)hdr->code == NM_DBLCLK ? wxEVT_COMMAND_TREE_ITEM_ACTIVATED : wxEVT_COMMAND_TREE_ITEM_RIGHT_CLICK; event.m_pointDrag.x = tvhti.pt.x; event.m_pointDrag.y = tvhti.pt.y; } break; } } // fall through default: return wxControl::MSWOnNotify(idCtrl, lParam, result); } event.SetEventObject(this); event.SetEventType(eventType); bool processed = GetEventHandler()->ProcessEvent(event); // post processing switch ( hdr->code ) { case NM_DBLCLK: // we translate NM_DBLCLK into ACTIVATED event, so don't interpret // the return code of this event handler as the return value for // NM_DBLCLK - otherwise, double clicking the item to toggle its // expanded status would never work *result = FALSE; break; case TVN_BEGINDRAG: case TVN_BEGINRDRAG: if ( event.IsAllowed() ) { // normally this is impossible because the m_dragImage is // deleted once the drag operation is over wxASSERT_MSG( !m_dragImage, _T("starting to drag once again?") ); m_dragImage = new wxDragImage(*this, event.m_item); m_dragImage->BeginDrag(wxPoint(0, 0), this); m_dragImage->Show(); } break; case TVN_DELETEITEM: { // NB: we might process this message using wxWindows event // tables, but due to overhead of wxWin event system we // prefer to do it here ourself (otherwise deleting a tree // with many items is just too slow) NM_TREEVIEW* tv = (NM_TREEVIEW *)lParam; wxTreeItemId item = event.m_item; if ( HasIndirectData(item) ) { wxTreeItemIndirectData *data = (wxTreeItemIndirectData *) tv->itemOld.lParam; delete data; // can't be NULL here } else { wxTreeItemData *data = (wxTreeItemData *)tv->itemOld.lParam; delete data; // may be NULL, ok } processed = TRUE; // Make sure we don't get called twice } break; case TVN_BEGINLABELEDIT: // return TRUE to cancel label editing *result = !event.IsAllowed(); // set ES_WANTRETURN ( like we do in BeginLabelEdit ) if(event.IsAllowed()) { HWND hText = TreeView_GetEditControl(GetHwnd()); if(hText != NULL) { // MBN: if m_textCtrl already has an HWND, it is a stale // pointer from a previous edit (because the user // didn't modify the label before dismissing the control, // and TVN_ENDLABELEDIT was not sent), so delete it if(m_textCtrl && m_textCtrl->GetHWND() != 0) DeleteTextCtrl(); if(!m_textCtrl) m_textCtrl = new wxTextCtrl(); m_textCtrl->SetParent(this); m_textCtrl->SetHWND((WXHWND)hText); m_textCtrl->SubclassWin((WXHWND)hText); // set wxTE_PROCESS_ENTER style for the text control to // force it to process the Enter presses itself, otherwise // they could be stolen from it by the dialog // navigation code m_textCtrl->SetWindowStyle(m_textCtrl->GetWindowStyle() | wxTE_PROCESS_ENTER); } } break; case TVN_ENDLABELEDIT: // return TRUE to set the label to the new string: note that we // also must pretend that we did process the message or it is going // to be passed to DefWindowProc() which will happily return FALSE // cancelling the label change *result = event.IsAllowed(); processed = TRUE; // ensure that we don't have the text ctrl which is going to be // deleted any more DeleteTextCtrl(); break; case TVN_SELCHANGING: case TVN_ITEMEXPANDING: // return TRUE to prevent the action from happening *result = !event.IsAllowed(); 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 = (WXHTREEITEM)tv->itemNew.hItem; int image = GetItemImage(id, wxTreeItemIcon_Expanded); if ( image != -1 ) { RefreshItem(id); } } break; case TVN_GETDISPINFO: // NB: so far the user can't set the image himself anyhow, so do it // anyway - but this may change later //if ( /* !processed && */ 1 ) { wxTreeItemId item = event.m_item; TV_DISPINFO *info = (TV_DISPINFO *)lParam; if ( info->item.mask & TVIF_IMAGE ) { info->item.iImage = DoGetItemImageFromData ( item, IsExpanded(item) ? wxTreeItemIcon_Expanded : wxTreeItemIcon_Normal ); } if ( info->item.mask & TVIF_SELECTEDIMAGE ) { info->item.iSelectedImage = DoGetItemImageFromData ( item, IsExpanded(item) ? wxTreeItemIcon_SelectedExpanded : wxTreeItemIcon_Selected ); } } break; //default: // for the other messages the return value is ignored and there is // nothing special to do } return processed; } #endif // __WIN95__ #endif // wxUSE_TREECTRL