X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/53f69f7a047a5d17009aaa44d086f98ce1f9d8db..2356708db31b737c6eae53c2316b642aa5a2e68d:/src/msw/treectrl.cpp?ds=inline diff --git a/src/msw/treectrl.cpp b/src/msw/treectrl.cpp index b7a0473428..8363d6ca9f 100644 --- a/src/msw/treectrl.cpp +++ b/src/msw/treectrl.cpp @@ -30,10 +30,6 @@ #include "wx/window.h" #include "wx/msw/private.h" -#ifndef WX_PRECOMP - #include "wx/settings.h" -#endif - // Mingw32 is a bit mental even though this is done in winundef #ifdef GetFirstChild #undef GetFirstChild @@ -51,10 +47,12 @@ #include "wx/treectrl.h" #ifdef __GNUWIN32__ +#ifndef wxUSE_NORLANDER_HEADERS #include "wx/msw/gnuwin32/extra.h" #endif +#endif -#if (defined(__WIN95__) && !defined(__GNUWIN32__)) || defined(__TWIN32__) +#if (defined(__WIN95__) && !defined(__GNUWIN32__)) || defined(__TWIN32__) || defined(wxUSE_NORLANDER_HEADERS) #include #endif @@ -70,15 +68,45 @@ // a convenient wrapper around TV_ITEM struct which adds a ctor struct wxTreeViewItem : public TV_ITEM { - wxTreeViewItem(const wxTreeItemId& item, - UINT mask_, UINT stateMask_ = 0) + wxTreeViewItem(const wxTreeItemId& item, // the item handle + UINT mask_, // fields which are valid + UINT stateMask_ = 0) // for TVIF_STATE only { - mask = mask_; + // hItem member is always valid + mask = mask_ | TVIF_HANDLE; stateMask = stateMask_; hItem = (HTREEITEM) (WXHTREEITEM) item; } }; +// 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; +}; + // ---------------------------------------------------------------------------- // macros // ---------------------------------------------------------------------------- @@ -102,6 +130,37 @@ static const wxEventType g_events[2][2] = // 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 // ---------------------------------------------------------------------------- @@ -113,37 +172,22 @@ void wxTreeCtrl::Init() m_textCtrl = NULL; } -bool wxTreeCtrl::Create(wxWindow *parent, wxWindowID id, - const wxPoint& pos, const wxSize& size, - long style, const wxValidator& validator, +bool wxTreeCtrl::Create(wxWindow *parent, + wxWindowID id, + const wxPoint& pos, + const wxSize& size, + long style, + const wxValidator& validator, const wxString& name) { Init(); - wxSystemSettings settings; - - SetName(name); - SetValidator(validator); - - m_windowStyle = style; - - SetParent(parent); - - m_windowId = (id == -1) ? NewControlId() : id; + if ( !CreateControl(parent, id, pos, size, style, validator, name) ) + return FALSE; DWORD wstyle = WS_VISIBLE | WS_CHILD | WS_TABSTOP | TVS_HASLINES | TVS_SHOWSELALWAYS; - bool want3D; - WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ; - - // Even with extended styles, need to combine with WS_BORDER - // for them to look right. - if ( want3D || wxStyleHasBorder(m_windowStyle) ) - { - wstyle |= WS_BORDER; - } - if ( m_windowStyle & wxTR_HAS_BUTTONS ) wstyle |= TVS_HASBUTTONS; @@ -153,26 +197,73 @@ bool wxTreeCtrl::Create(wxWindow *parent, wxWindowID id, if ( m_windowStyle & wxTR_LINES_AT_ROOT ) wstyle |= TVS_LINESATROOT; +#if !defined( __GNUWIN32__ ) && !defined(wxUSE_NORLANDER_HEADERS) + // 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 + // Create the tree control. - m_hWnd = (WXHWND)::CreateWindowEx - ( - exStyle, - WC_TREEVIEW, - _T(""), - wstyle, - pos.x, pos.y, size.x, size.y, - (HWND)parent->GetHWND(), - (HMENU)m_windowId, - wxGetInstance(), - NULL - ); - - wxCHECK_MSG( m_hWnd, FALSE, _T("Failed to create tree ctrl") ); - - if ( parent ) - parent->AddChild(this); - - SubclassWin(m_hWnd); + if ( !MSWCreateControl(WC_TREEVIEW, wstyle) ) + return FALSE; + + // the treectrl with any other background looks ugly because the items + // background is white anyhow + SetBackgroundColour(*wxWHITE); + + // 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(_T("DrawFrameControl(check)")); + } + + bmp.SetHBITMAP((WXHBITMAP)hbmpCheck); + imagelistCheckboxes.Add(bmp); + + if ( !::DrawFrameControl(hdcMem, &rect, + DFC_BUTTON, + DFCS_BUTTONCHECK) ) + { + wxLogLastError(_T("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; } @@ -254,29 +345,36 @@ void wxTreeCtrl::SetStateImageList(wxImageList *imageList) SetAnyImageList(m_imageListState = imageList, TVSIL_STATE); } -size_t wxTreeCtrl::GetChildrenCount(const wxTreeItemId& item, bool recursively) +size_t wxTreeCtrl::GetChildrenCount(const wxTreeItemId& item, + bool recursively) const { - long cookie; + class TraverseCounter : public wxTreeTraversal + { + public: + TraverseCounter(const wxTreeCtrl *tree, + const wxTreeItemId& root, + bool recursively) + : wxTreeTraversal(tree) + { + m_count = 0; - size_t result = 0; + DoTraverse(root, recursively); + } - wxArrayLong children; - wxTreeItemId child = GetFirstChild(item, cookie); - while ( child.IsOk() ) - { - if ( recursively ) + virtual bool OnVisit(const wxTreeItemId& item) { - // recursive call - result += GetChildrenCount(child, TRUE); + m_count++; + + return TRUE; } - // add the child to the result in any case - result++; + size_t GetCount() const { return m_count; } - child = GetNextChild(item, cookie); - } + private: + size_t m_count; + } counter(this, item, recursively); - return result; + return counter.GetCount(); } // ---------------------------------------------------------------------------- @@ -306,6 +404,16 @@ void wxTreeCtrl::SetItemText(const wxTreeItemId& item, const wxString& text) DoSetItem(&tvItem); } +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) const { wxTreeViewItem tvItem(item, TVIF_IMAGE); @@ -316,9 +424,10 @@ int wxTreeCtrl::GetItemImage(const wxTreeItemId& item) const void wxTreeCtrl::SetItemImage(const wxTreeItemId& item, int image) { - wxTreeViewItem tvItem(item, TVIF_IMAGE); - tvItem.iImage = image; - DoSetItem(&tvItem); + // 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, image, GetItemSelectedImage(item)); } int wxTreeCtrl::GetItemSelectedImage(const wxTreeItemId& item) const @@ -331,9 +440,10 @@ int wxTreeCtrl::GetItemSelectedImage(const wxTreeItemId& item) const void wxTreeCtrl::SetItemSelectedImage(const wxTreeItemId& item, int image) { - wxTreeViewItem tvItem(item, TVIF_SELECTEDIMAGE); - tvItem.iSelectedImage = image; - DoSetItem(&tvItem); + // 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, GetItemImage(item), image); } wxTreeItemData *wxTreeCtrl::GetItemData(const wxTreeItemId& item) const @@ -433,6 +543,9 @@ wxTreeItemId wxTreeCtrl::GetRootItem() const wxTreeItemId wxTreeCtrl::GetSelection() const { + wxCHECK_MSG( !(m_windowStyle & wxTR_MULTIPLE), (WXHTREEITEM)0, + _T("this only works with single selection controls") ); + return wxTreeItemId((WXHTREEITEM) TreeView_GetSelection(GetHwnd())); } @@ -507,6 +620,62 @@ wxTreeItemId wxTreeCtrl::GetPrevVisible(const wxTreeItemId& item) const return wxTreeItemId((WXHTREEITEM) TreeView_GetPrevVisible(GetHwnd(), (HTREEITEM) (WXHTREEITEM) 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); + + // state images are one-based + tvItem.state = (check ? 2 : 1) << 12; + + DoSetItem(&tvItem); +} + +size_t wxTreeCtrl::GetSelections(wxArrayTreeItemIds& selections) const +{ + 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) + { + if ( GetTree()->IsItemChecked(item) ) + { + m_selections.Add(item); + } + + return TRUE; + } + + private: + wxArrayTreeItemIds& m_selections; + } selector(this, selections); + + return selections.GetCount(); +} + // ---------------------------------------------------------------------------- // Usual operations // ---------------------------------------------------------------------------- @@ -721,38 +890,67 @@ void wxTreeCtrl::Toggle(const wxTreeItemId& item) void wxTreeCtrl::ExpandItem(const wxTreeItemId& item, int action) { - DoExpand(item, action); + DoExpand(item, action); } void wxTreeCtrl::Unselect() { + wxASSERT_MSG( !(m_windowStyle & wxTR_MULTIPLE), _T("doesn't make sense") ); + + // just remove the selection SelectItem(wxTreeItemId((WXHTREEITEM) 0)); } -void wxTreeCtrl::SelectItem(const wxTreeItemId& item) +void wxTreeCtrl::UnselectAll() { - // 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 ( m_windowStyle & wxTR_MULTIPLE ) { - if ( !TreeView_SelectItem(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item) ) + wxArrayTreeItemIds selections; + size_t count = GetSelections(selections); + for ( size_t n = 0; n < count; n++ ) { - wxLogLastError("TreeView_SelectItem"); + SetItemCheck(selections[n], FALSE); } - else + } + else + { + // just remove the selection + Unselect(); + } +} + +void wxTreeCtrl::SelectItem(const wxTreeItemId& item) +{ + if ( m_windowStyle & wxTR_MULTIPLE ) + { + // selecting the item means checking it + SetItemCheck(item); + } + 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() ) { - event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGED); - (void)GetEventHandler()->ProcessEvent(event); + if ( !TreeView_SelectItem(GetHwnd(), (HTREEITEM) (WXHTREEITEM) item) ) + { + wxLogLastError("TreeView_SelectItem"); + } + else + { + event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGED); + (void)GetEventHandler()->ProcessEvent(event); + } } + //else: program vetoed the change } - //else: program vetoed the change } void wxTreeCtrl::EnsureVisible(const wxTreeItemId& item)