toplevel.cpp

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///////////////////////////////////////////////////////////////////////////////
// Name:        msw/toplevel.cpp
// Purpose:     implements wxTopLevelWindow for MSW
// Author:      Vadim Zeitlin
// Modified by:
// Created:     24.09.01
// RCS-ID:      $Id: toplevel.cpp,v 1.120.2.3 2006/03/16 23:15:36 ABX Exp $
// Copyright:   (c) 2001 SciTech Software, Inc. (www.scitechsoft.com)
// License:     wxWindows licence
///////////////////////////////////////////////////////////////////////////////

// ============================================================================
// declarations
// ============================================================================

// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
    #pragma implementation "toplevel.h"
#endif

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#ifndef WX_PRECOMP
    #include "wx/app.h"
    #include "wx/toplevel.h"
    #include "wx/dialog.h"
    #include "wx/string.h"
    #include "wx/log.h"
    #include "wx/intl.h"
    #include "wx/frame.h"
    #include "wx/containr.h"        // wxSetFocusToChild()
#endif //WX_PRECOMP

#include "wx/module.h"
#include "wx/dynlib.h"

#include "wx/msw/private.h"
#if defined(__WXWINCE__) && !defined(__HANDHELDPC__)
  #include <ole2.h>
  #include <shellapi.h>
  // Standard SDK doesn't have aygshell.dll: see include/wx/msw/wince/libraries.h
  #if _WIN32_WCE < 400 || !defined(__WINCE_STANDARDSDK__)
    #include <aygshell.h>
  #endif
#include "wx/msw/wince/missing.h"
#endif

#include "wx/msw/missing.h"
#include "wx/msw/winundef.h"

#include "wx/display.h"

#ifndef ICON_BIG
    #define ICON_BIG 1
#endif

#ifndef ICON_SMALL
    #define ICON_SMALL 0
#endif

// ----------------------------------------------------------------------------
// stubs for missing functions under MicroWindows
// ----------------------------------------------------------------------------

#ifdef __WXMICROWIN__

// static inline bool IsIconic(HWND WXUNUSED(hwnd)) { return false; }
static inline bool IsZoomed(HWND WXUNUSED(hwnd)) { return false; }

#endif // __WXMICROWIN__

// NB: wxDlgProc must be defined here and not in dialog.cpp because the latter
//     is not included by wxUniv build which does need wxDlgProc
LONG APIENTRY _EXPORT
wxDlgProc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam);

// ----------------------------------------------------------------------------
// globals
// ----------------------------------------------------------------------------

// the name of the default wxWidgets class
#ifdef __WXWINCE__
extern       wxChar *wxCanvasClassName;
#else
extern const wxChar *wxCanvasClassName;
#endif

// ----------------------------------------------------------------------------
// wxTLWHiddenParentModule: used to manage the hidden parent window (we need a
// module to ensure that the window is always deleted)
// ----------------------------------------------------------------------------

class wxTLWHiddenParentModule : public wxModule
{
public:
    // module init/finalize
    virtual bool OnInit();
    virtual void OnExit();

    // get the hidden window (creates on demand)
    static HWND GetHWND();

private:
    // the HWND of the hidden parent
    static HWND ms_hwnd;

    // the class used to create it
    static const wxChar *ms_className;

    DECLARE_DYNAMIC_CLASS(wxTLWHiddenParentModule)
};

IMPLEMENT_DYNAMIC_CLASS(wxTLWHiddenParentModule, wxModule)

// ============================================================================
// wxTopLevelWindowMSW implementation
// ============================================================================

BEGIN_EVENT_TABLE(wxTopLevelWindowMSW, wxTopLevelWindowBase)
    EVT_ACTIVATE(wxTopLevelWindowMSW::OnActivate)
END_EVENT_TABLE()

// ----------------------------------------------------------------------------
// wxTopLevelWindowMSW creation
// ----------------------------------------------------------------------------

void wxTopLevelWindowMSW::Init()
{
    m_iconized =
    m_maximizeOnShow = false;

    // Data to save/restore when calling ShowFullScreen
    m_fsStyle = 0;
    m_fsOldWindowStyle = 0;
    m_fsIsMaximized = false;
    m_fsIsShowing = false;

    m_winLastFocused = (wxWindow *)NULL;

#if defined(__SMARTPHONE__) && defined(__WXWINCE__)
    m_MenuBarHWND = 0;
#endif
}

WXDWORD wxTopLevelWindowMSW::MSWGetStyle(long style, WXDWORD *exflags) const
{
    // let the base class deal with the common styles but fix the ones which
    // don't make sense for us (we also deal with the borders ourselves)
    WXDWORD msflags = wxWindow::MSWGetStyle
                      (
                        (style & ~wxBORDER_MASK) | wxBORDER_NONE, exflags
                      ) & ~WS_CHILD & ~WS_VISIBLE;

    // For some reason, WS_VISIBLE needs to be defined on creation for
    // SmartPhone 2003. The title can fail to be displayed otherwise.
#if defined(__SMARTPHONE__) || (defined(__WXWINCE__) && _WIN32_WCE < 400)
    msflags |= WS_VISIBLE;
    ((wxTopLevelWindowMSW*)this)->wxWindowBase::Show(true);
#endif

    // first select the kind of window being created
    //
    // note that if we don't set WS_POPUP, Windows assumes WS_OVERLAPPED and
    // creates a window with both caption and border, hence we need to use
    // WS_POPUP in a few cases just to avoid having caption/border which we
    // don't want

#if !(defined(__SMARTPHONE__) && defined(__WXWINCE__))
    // border and caption styles
    if ( style & wxRESIZE_BORDER )
        msflags |= WS_THICKFRAME;
    else if ( exflags && ((style & wxBORDER_DOUBLE) || (style & wxBORDER_RAISED)) )
        *exflags |= WS_EX_DLGMODALFRAME;
    else if ( !(style & wxBORDER_NONE) )
        msflags |= WS_BORDER;
#ifndef __POCKETPC__
    else
        msflags |= WS_POPUP;
#endif
#endif

    // normally we consider that all windows without a caption must be popups,
    // but CE is an exception: there windows normally do not have the caption
    // but shouldn't be made popups as popups can't have menus and don't look
    // like normal windows anyhow

    // TODO: Smartphone appears to like wxCAPTION, but we should check that
    // we need it.
#if defined(__SMARTPHONE__) || !defined(__WXWINCE__)
    if ( style & wxCAPTION )
        msflags |= WS_CAPTION;
#ifndef __WXWINCE__
    else
        msflags |= WS_POPUP;
#endif // !__WXWINCE__
#endif

    // next translate the individual flags
    if ( style & wxMINIMIZE_BOX )
        msflags |= WS_MINIMIZEBOX;
    if ( style & wxMAXIMIZE_BOX )
        msflags |= WS_MAXIMIZEBOX;

#ifndef __WXWINCE__    
    if ( style & wxSYSTEM_MENU )
        msflags |= WS_SYSMENU;
#endif

    // NB: under CE these 2 styles are not supported currently, we should
    //     call Minimize()/Maximize() "manually" if we want to support them
    if ( style & wxMINIMIZE )
        msflags |= WS_MINIMIZE;

#if !defined(__POCKETPC__)
    if ( style & wxMAXIMIZE )
        msflags |= WS_MAXIMIZE;
#endif

    // Keep this here because it saves recoding this function in wxTinyFrame
    if ( style & (wxTINY_CAPTION_VERT | wxTINY_CAPTION_HORIZ) )
        msflags |= WS_CAPTION;

    if ( exflags )
    {
        // there is no taskbar under CE, so omit all this
#if !defined(__WXWINCE__)
        if ( !(GetExtraStyle() & wxTOPLEVEL_EX_DIALOG) )
        {
            if ( style & wxFRAME_TOOL_WINDOW )
            {
                // create the palette-like window
                *exflags |= WS_EX_TOOLWINDOW;

                // tool windows shouldn't appear on the taskbar (as documented)
                style |= wxFRAME_NO_TASKBAR;
            }

            // We have to solve 2 different problems here:
            //
            // 1. frames with wxFRAME_NO_TASKBAR flag shouldn't appear in the
            //    taskbar even if they don't have a parent
            //
            // 2. frames without this style should appear in the taskbar even
            //    if they're owned (Windows only puts non owned windows into
            //    the taskbar normally)
            //
            // The second one is solved here by using WS_EX_APPWINDOW flag, the
            // first one is dealt with in our MSWGetParent() method
            // implementation
            if ( !(style & wxFRAME_NO_TASKBAR) && GetParent() )
            {
                // need to force the frame to appear in the taskbar
                *exflags |= WS_EX_APPWINDOW;
            }
            //else: nothing to do [here]
        }

        if ( GetExtraStyle() & wxFRAME_EX_CONTEXTHELP )
            *exflags |= WS_EX_CONTEXTHELP;
#endif // !__WXWINCE__

        if ( style & wxSTAY_ON_TOP )
            *exflags |= WS_EX_TOPMOST;
    }

    return msflags;
}

WXHWND wxTopLevelWindowMSW::MSWGetParent() const
{
    // for the frames without wxFRAME_FLOAT_ON_PARENT style we should use NULL
    // parent HWND or it would be always on top of its parent which is not what
    // we usually want (in fact, we only want it for frames with the
    // wxFRAME_FLOAT_ON_PARENT flag)
    HWND hwndParent = NULL;
    if ( HasFlag(wxFRAME_FLOAT_ON_PARENT) )
    {
        const wxWindow *parent = GetParent();

        if ( !parent )
        {
            // this flag doesn't make sense then and will be ignored
            wxFAIL_MSG( _T("wxFRAME_FLOAT_ON_PARENT but no parent?") );
        }
        else
        {
            hwndParent = GetHwndOf(parent);
        }
    }
    //else: don't float on parent, must not be owned

    // now deal with the 2nd taskbar-related problem (see comments above in
    // MSWGetStyle())
    if ( HasFlag(wxFRAME_NO_TASKBAR) && !hwndParent )
    {
        // use hidden parent
        hwndParent = wxTLWHiddenParentModule::GetHWND();
    }

    return (WXHWND)hwndParent;
}

bool wxTopLevelWindowMSW::CreateDialog(const void *dlgTemplate,
                                       const wxString& title,
                                       const wxPoint& pos,
                                       const wxSize& size)
{
#ifdef __WXMICROWIN__
    // no dialogs support under MicroWin yet
    return CreateFrame(title, pos, size);
#else // !__WXMICROWIN__
    wxWindow *parent = GetParent();

    // for the dialogs without wxDIALOG_NO_PARENT style, use the top level
    // app window as parent - this avoids creating modal dialogs without
    // parent
    if ( !parent && !(GetWindowStyleFlag() & wxDIALOG_NO_PARENT) )
    {
        parent = wxTheApp->GetTopWindow();

        if ( parent )
        {
            // don't use transient windows as parents, this is dangerous as it
            // can lead to a crash if the parent is destroyed before the child
            //
            // also don't use the window which is currently hidden as then the
            // dialog would be hidden as well
            if ( (parent->GetExtraStyle() & wxWS_EX_TRANSIENT) ||
                    !parent->IsShown() )
            {
                parent = NULL;
            }
        }
    }

    m_hWnd = (WXHWND)::CreateDialogIndirect
                       (
                        wxGetInstance(),
                        (DLGTEMPLATE*)dlgTemplate,
                        parent ? GetHwndOf(parent) : NULL,
                        (DLGPROC)wxDlgProc
                       );

    if ( !m_hWnd )
    {
        wxFAIL_MSG(wxT("Failed to create dialog. Incorrect DLGTEMPLATE?"));

        wxLogSysError(wxT("Can't create dialog using memory template"));

        return false;
    }

    WXDWORD exflags;
    (void)MSWGetCreateWindowFlags(&exflags);

    if ( exflags )
    {
        ::SetWindowLong(GetHwnd(), GWL_EXSTYLE, exflags);
        ::SetWindowPos(GetHwnd(),
                       exflags & WS_EX_TOPMOST ? HWND_TOPMOST : 0,
                       0, 0, 0, 0,
                       SWP_NOSIZE |
                       SWP_NOMOVE |
                       (exflags & WS_EX_TOPMOST ? 0 : SWP_NOZORDER) |
                       SWP_NOACTIVATE);
    }

#if !defined(__WXWINCE__)
    // For some reason, the system menu is activated when we use the
    // WS_EX_CONTEXTHELP style, so let's set a reasonable icon
    if ( exflags & WS_EX_CONTEXTHELP )
    {
        wxFrame *winTop = wxDynamicCast(wxTheApp->GetTopWindow(), wxFrame);
        if ( winTop )
        {
            wxIcon icon = winTop->GetIcon();
            if ( icon.Ok() )
            {
                ::SendMessage(GetHwnd(), WM_SETICON,
                              (WPARAM)TRUE,
                              (LPARAM)GetHiconOf(icon));
            }
        }