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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  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
      6  *
      7  * This library is free software; you can redistribute it and/or
      8  * modify it under the terms of the GNU Library General Public
      9  * License as published by the Free Software Foundation; either
     10  * version 2 of the License, or (at your option) any later version.
     11  *
     12  * This library is distributed in the hope that it will be useful,
     13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     15  * Library General Public License for more details.
     16  *
     17  * You should have received a copy of the GNU Library General Public License
     18  * along with this library; see the file COPYING.LIB.  If not, write to
     19  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     20  * Boston, MA 02110-1301, USA.
     21  *
     22  */
     23 
     24 #include "config.h"
     25 #include "PopupMenuWx.h"
     26 
     27 #include "Frame.h"
     28 #include "FrameView.h"
     29 #include "PopupMenuClient.h"
     30 #include "PlatformString.h"
     31 
     32 #include <wx/defs.h>
     33 #if __WXMSW__
     34 #include <wx/msw/winundef.h>
     35 #endif
     36 #include <wx/event.h>
     37 #include <wx/menu.h>
     38 
     39 static int s_menuStartId = wxNewId();
     40 
     41 namespace WebCore {
     42 
     43 class PopupMenuEventHandler : public wxEvtHandler
     44 {
     45 public:
     46     PopupMenuEventHandler(PopupMenuClient* client) :
     47         m_client(client)
     48     {}
     49 
     50     void OnMenuItemSelected(wxCommandEvent& event)
     51     {
     52         if (m_client) {
     53             m_client->valueChanged(event.GetId() - s_menuStartId);
     54             m_client->popupDidHide();
     55         }
     56         // TODO: Do we need to call Disconnect here? Do we have a ref to the native window still?
     57     }
     58 
     59 private:
     60     PopupMenuClient* m_client;
     61 
     62 };
     63 
     64 PopupMenuWx::PopupMenuWx(PopupMenuClient* client)
     65     : m_popupClient(client)
     66     , m_menu(0)
     67 {
     68     PopupMenuEventHandler m_popupHandler(client);
     69 }
     70 
     71 PopupMenuWx::~PopupMenuWx()
     72 {
     73     delete m_menu;
     74 }
     75 
     76 void PopupMenuWx::disconnectClient()
     77 {
     78     m_popupClient = 0;
     79 }
     80 
     81 void PopupMenuWx::show(const IntRect& r, FrameView* v, int index)
     82 {
     83     // just delete and recreate
     84     delete m_menu;
     85     ASSERT(client());
     86 
     87     wxWindow* nativeWin = v->platformWidget();
     88 
     89     if (nativeWin) {
     90         // construct the menu
     91         m_menu = new wxMenu();
     92 
     93         int size = client()->listSize();
     94         for (int i = 0; i < size; i++) {
     95             int id = s_menuStartId + i;
     96 
     97             if (client()->itemIsSeparator(i)) {
     98                 m_menu->AppendSeparator();
     99             }
    100             else {
    101                 // FIXME: appending a menu item with an empty label asserts in
    102                 // wx. This needs to be fixed at wx level so that we can have
    103                 // the concept of "no selection" in choice boxes, etc.
    104                 if (!client()->itemText(i).isEmpty())
    105                     m_menu->Append(s_menuStartId + i, client()->itemText(i));
    106             }
    107         }
    108         nativeWin->Connect(s_menuStartId, s_menuStartId + (size-1), wxEVT_COMMAND_MENU_SELECTED, wxCommandEventHandler(PopupMenuEventHandler::OnMenuItemSelected), 0, m_popupHandler);
    109         nativeWin->PopupMenu(m_menu, r.x() - v->scrollX(), r.y() - v->scrollY());
    110         nativeWin->Disconnect(s_menuStartId, s_menuStartId + (size-1), wxEVT_COMMAND_MENU_SELECTED, wxCommandEventHandler(PopupMenuEventHandler::OnMenuItemSelected), 0, m_popupHandler);
    111     }
    112 }
    113 
    114 void PopupMenuWx::hide()
    115 {
    116     // we don't need to do anything here, the native control only exists during the time
    117     // show is called
    118 }
    119 
    120 void PopupMenuWx::updateFromElement()
    121 {
    122     client()->setTextFromItem(m_popupClient->selectedIndex());
    123 }
    124 
    125 }
    126