+// ----------------------------------------------------------------------------
+// implementation
+// ----------------------------------------------------------------------------
+
+bool wxTreeCtrl::MSWShouldPreProcessMessage(WXMSG* msg)
+{
+ if ( msg->message == WM_KEYDOWN )
+ {
+ // Only eat VK_RETURN if not being used by the application in
+ // conjunction with modifiers
+ if ( (msg->wParam == VK_RETURN) && !wxIsAnyModifierDown() )
+ {
+ // we need VK_RETURN to generate wxEVT_COMMAND_TREE_ITEM_ACTIVATED
+ return false;
+ }
+ }
+
+ return wxTreeCtrlBase::MSWShouldPreProcessMessage(msg);
+}
+
+bool wxTreeCtrl::MSWCommand(WXUINT cmd, WXWORD id_)
+{
+ const int id = (signed short)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
+WXLRESULT wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
+{
+ bool processed = false;
+ WXLRESULT rc = 0;
+ bool isMultiple = HasFlag(wxTR_MULTIPLE);
+
+ // This message is sent after a right-click, or when the "menu" key is pressed
+ if ( nMsg == WM_CONTEXTMENU )
+ {
+ int x = GET_X_LPARAM(lParam),
+ y = GET_Y_LPARAM(lParam);
+
+ // the item for which the menu should be shown
+ wxTreeItemId item;
+
+ // the position where the menu should be shown in client coordinates
+ // (so that it can be passed directly to PopupMenu())
+ wxPoint pt;
+
+ if ( x == -1 || y == -1 )
+ {
+ // this means that the event was generated from keyboard (e.g. with
+ // Shift-F10 or special Windows menu key)
+ //
+ // use the Explorer standard of putting the menu at the left edge
+ // of the text, in the vertical middle of the text
+ item = wxTreeItemId(TreeView_GetSelection(GetHwnd()));
+ if ( item.IsOk() )
+ {
+ // Use the bounding rectangle of only the text part
+ wxRect rect;
+ GetBoundingRect(item, rect, true);
+ pt = wxPoint(rect.GetX(), rect.GetY() + rect.GetHeight() / 2);
+ }
+ }
+ else // event from mouse, use mouse position
+ {
+ pt = ScreenToClient(wxPoint(x, y));
+
+ TV_HITTESTINFO tvhti;
+ tvhti.pt.x = pt.x;
+ tvhti.pt.y = pt.y;
+ if ( TreeView_HitTest(GetHwnd(), &tvhti) )
+ item = wxTreeItemId(tvhti.hItem);
+ }
+
+ // create the event
+ wxTreeEvent event(wxEVT_COMMAND_TREE_ITEM_MENU, this, item);
+
+ event.m_pointDrag = pt;
+
+ if ( HandleWindowEvent(event) )
+ processed = true;
+ //else: continue with generating wxEVT_CONTEXT_MENU in base class code
+ }
+ else 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);
+
+ TV_HITTESTINFO tvht;
+ tvht.pt.x = x;
+ tvht.pt.y = y;
+
+ HTREEITEM htItem = TreeView_HitTest(GetHwnd(), &tvht);
+
+ switch ( nMsg )
+ {
+ case WM_LBUTTONDOWN:
+ if ( htItem && isMultiple && (tvht.flags & TVHT_ONITEM) != 0 )
+ {
+ m_htClickedItem = (WXHTREEITEM) htItem;
+ m_ptClick = wxPoint(x, y);
+
+ if ( wParam & MK_CONTROL )
+ {
+ SetFocus();
+
+ // toggle selected state
+ ToggleItemSelection(htItem);
+
+ ::SetFocus(GetHwnd(), htItem);
+
+ // reset on any click without Shift
+ m_htSelStart.Unset();
+
+ 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 = TreeView_GetSelection(GetHwnd());
+ }
+
+ if ( m_htSelStart )
+ SelectRange(GetHwnd(), HITEM(m_htSelStart), htItem,
+ !(wParam & MK_CONTROL));
+ else
+ ::SelectItem(GetHwnd(), htItem);
+
+ ::SetFocus(GetHwnd(), htItem);
+
+ processed = true;
+ }
+ else // normal click
+ {
+ // avoid doing anything if we click on the only
+ // currently selected item
+
+ SetFocus();
+
+ wxArrayTreeItemIds selections;
+ size_t count = GetSelections(selections);
+ if ( count == 0 ||
+ count > 1 ||
+ HITEM(selections[0]) != htItem )
+ {
+ // clear the previously selected items, if the
+ // user clicked outside of the present selection.
+ // otherwise, perform the deselection on mouse-up.
+ // this allows multiple drag and drop to work.
+
+ if (!IsItemSelected(GetHwnd(), htItem))
+ {
+ 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);
+ ::SelectItem(GetHwnd(), htItem);
+ }
+ ::SetFocus(GetHwnd(), htItem);
+ processed = true;
+ }
+ else // click on a single selected item
+ {
+ // don't interfere with the default processing in
+ // WM_MOUSEMOVE handler below as the default window
+ // proc will start the drag itself if we let have
+ // WM_LBUTTONDOWN
+ m_htClickedItem.Unset();
+ }
+
+ // reset on any click without Shift
+ m_htSelStart.Unset();
+ }
+ }
+ break;
+
+ case WM_RBUTTONDOWN:
+ // default handler removes the highlight from the currently
+ // focused item when right mouse button is pressed on another
+ // one but keeps the remaining items highlighted, which is
+ // confusing, so override this default behaviour for tree with
+ // multiple selections
+ if ( isMultiple )
+ {
+ if ( !IsItemSelected(GetHwnd(), htItem) )
+ {
+ UnselectAll();
+ SelectItem(htItem);
+ ::SetFocus(GetHwnd(), htItem);
+ }
+
+ // fire EVT_RIGHT_DOWN
+ HandleMouseEvent(nMsg, x, y, wParam);
+
+ // send NM_RCLICK
+ NMHDR nmhdr;
+ nmhdr.hwndFrom = GetHwnd();
+ nmhdr.idFrom = ::GetWindowLong(GetHwnd(), GWL_ID);
+ nmhdr.code = NM_RCLICK;
+ ::SendMessage(::GetParent(GetHwnd()), WM_NOTIFY,
+ nmhdr.idFrom, (LPARAM)&nmhdr);
+
+ // prevent tree control default processing, as we've
+ // already done everything
+ processed = true;
+ }
+ break;
+
+ case WM_MOUSEMOVE:
+#ifndef __WXWINCE__
+ if ( m_htClickedItem )
+ {
+ int cx = abs(m_ptClick.x - x);
+ int cy = abs(m_ptClick.y - y);
projects / wxWidgets.git / blobdiff