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      1 /*
      2  * This file is part of the popup menu implementation for <select> elements in WebCore.
      3  *
      4  * Copyright (C) 2008 Apple Computer, Inc.
      5  *
      6  * This library is free software; you can redistribute it and/or
      7  * modify it under the terms of the GNU Library General Public
      8  * License as published by the Free Software Foundation; either
      9  * version 2 of the License, or (at your option) any later version.
     10  *
     11  * This library is distributed in the hope that it will be useful,
     12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14  * Library General Public License for more details.
     15  *
     16  * You should have received a copy of the GNU Library General Public License
     17  * along with this library; see the file COPYING.LIB.  If not, write to
     18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     19  * Boston, MA 02110-1301, USA.
     20  *
     21  */
     22 
     23 #include "config.h"
     24 #include "PopupMenu.h"
     25 
     26 #include "Frame.h"
     27 #include "FrameView.h"
     28 #include "PopupMenuClient.h"
     29 #include "PlatformString.h"
     30 
     31 #include <wx/defs.h>
     32 #if __WXMSW__
     33 #include <wx/msw/winundef.h>
     34 #endif
     35 #include <wx/event.h>
     36 #include <wx/menu.h>
     37 
     38 static int s_menuStartId = wxNewId();
     39 
     40 
     41 
     42 namespace WebCore {
     43 
     44 PopupMenu::PopupMenu(PopupMenuClient* client)
     45     : m_popupClient(client)
     46     , m_menu(NULL)
     47 {
     48 }
     49 
     50 PopupMenu::~PopupMenu()
     51 {
     52     delete m_menu;
     53 }
     54 
     55 void PopupMenu::show(const IntRect& r, FrameView* v, int index)
     56 {
     57     // just delete and recreate
     58     delete m_menu;
     59     ASSERT(client());
     60 
     61     wxWindow* nativeWin = v->platformWidget();
     62 
     63     if (nativeWin) {
     64         // construct the menu
     65         m_menu = new wxMenu();
     66         int size = client()->listSize();
     67         for (int i = 0; i < size; i++) {
     68             int id = s_menuStartId + i;
     69 
     70             if (client()->itemIsSeparator(i)) {
     71                 m_menu->AppendSeparator();
     72             }
     73             else {
     74                 // FIXME: appending a menu item with an empty label asserts in
     75                 // wx. This needs to be fixed at wx level so that we can have
     76                 // the concept of "no selection" in choice boxes, etc.
     77                 if (!client()->itemText(i).isEmpty())
     78                     m_menu->Append(s_menuStartId + i, client()->itemText(i));
     79             }
     80         }
     81         nativeWin->Connect(s_menuStartId, s_menuStartId + (size-1), wxEVT_COMMAND_MENU_SELECTED, wxCommandEventHandler(PopupMenu::OnMenuItemSelected), NULL, this);
     82         nativeWin->PopupMenu(m_menu, r.x() - v->scrollX(), r.y() - v->scrollY());
     83         nativeWin->Disconnect(s_menuStartId, s_menuStartId + (size-1), wxEVT_COMMAND_MENU_SELECTED, wxCommandEventHandler(PopupMenu::OnMenuItemSelected), NULL, this);
     84     }
     85 }
     86 
     87 void PopupMenu::OnMenuItemSelected(wxCommandEvent& event)
     88 {
     89     if (client()) {
     90         client()->valueChanged(event.GetId() - s_menuStartId);
     91         client()->popupDidHide();
     92     }
     93     // TODO: Do we need to call Disconnect here? Do we have a ref to the native window still?
     94 }
     95 
     96 void PopupMenu::hide()
     97 {
     98     // we don't need to do anything here, the native control only exists during the time
     99     // show is called
    100 }
    101 
    102 void PopupMenu::updateFromElement()
    103 {
    104     client()->setTextFromItem(m_popupClient->selectedIndex());
    105 }
    106 
    107 bool PopupMenu::itemWritingDirectionIsNatural()
    108 {
    109     return false;
    110 }
    111 
    112 }
    113