Added ::IsOk() to wxDataStream for error checking in

[wxWidgets.git] / src / msw / toplevel.cpp

///////////////////////////////////////////////////////////////////////////////
// Name:        msw/toplevel.cpp
// Purpose:     implements wxTopLevelWindow for MSW
// Author:      Vadim Zeitlin
// Modified by:
// Created:     24.09.01
// RCS-ID:      $Id$
// Copyright:   (c) 2001 SciTech Software, Inc. (www.scitechsoft.com)
// License:     wxWindows license
///////////////////////////////////////////////////////////////////////////////

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

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

#ifdef __GNUG__
    #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/string.h"
    #include "wx/log.h"
    #include "wx/intl.h"
    #include "wx/frame.h"
#endif //WX_PRECOMP

#include "wx/msw/private.h"

// ----------------------------------------------------------------------------
// 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__

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

// list of all frames and modeless dialogs
wxWindowList wxModelessWindows;

// the name of the default wxWindows class
extern const wxChar *wxCanvasClassName;

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

// Dialog window proc
LONG APIENTRY _EXPORT
wxDlgProc(HWND WXUNUSED(hWnd), UINT message, WPARAM WXUNUSED(wParam), LPARAM WXUNUSED(lParam))
{
    if ( message == WM_INITDIALOG )
    {
        // for this message, returning TRUE tells system to set focus to the
        // first control in the dialog box
        return TRUE;
    }
    else
    {
        // for all the other ones, FALSE means that we didn't process the
        // message
        return FALSE;
    }
}

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

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

    // unlike (almost?) all other windows, frames are created hidden
    m_isShown = FALSE;

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

long wxTopLevelWindowMSW::MSWGetCreateWindowFlags(long *exflags) const
{
    long style = GetWindowStyle();
    long msflags = 0;

    // first select the kind of window being created
    if ( style & wxCAPTION )
    {
        if ( style & wxFRAME_TOOL_WINDOW )
            msflags |= WS_POPUPWINDOW;
        else
            msflags |= WS_OVERLAPPED;
    }
    else
    {
        msflags |= WS_POPUP;
    }

    // next translate the individual flags
    if ( style & wxMINIMIZE_BOX )
        msflags |= WS_MINIMIZEBOX;
    if ( style & wxMAXIMIZE_BOX )
        msflags |= WS_MAXIMIZEBOX;
    if ( style & wxTHICK_FRAME )
        msflags |= WS_THICKFRAME;
    if ( style & wxSYSTEM_MENU )
        msflags |= WS_SYSMENU;
    if ( style & wxMINIMIZE )
        msflags |= WS_MINIMIZE;
    if ( style & wxMAXIMIZE )
        msflags |= WS_MAXIMIZE;
    if ( style & wxCAPTION )
        msflags |= WS_CAPTION;
    if ( style & wxCLIP_CHILDREN )
        msflags |= WS_CLIPCHILDREN;

    // Keep this here because it saves recoding this function in wxTinyFrame
#if wxUSE_ITSY_BITSY && !defined(__WIN32__)
    if ( style & wxTINY_CAPTION_VERT )
        msflags |= IBS_VERTCAPTION;
    if ( style & wxTINY_CAPTION_HORIZ )
        msflags |= IBS_HORZCAPTION;
#else
    if ( style & (wxTINY_CAPTION_VERT | wxTINY_CAPTION_HORIZ) )
        msflags |= WS_CAPTION;
#endif

    if ( exflags )
    {
        *exflags = MakeExtendedStyle(style);

#if !defined(__WIN16__) && !defined(__SC__)
        if ( !(GetExtraStyle() & wxTOPLEVEL_EX_DIALOG) )
        {
            // make all frames appear in the win9x shell taskbar unless
            // wxFRAME_TOOL_WINDOW or wxFRAME_NO_TASKBAR is given - without
            // giving them WS_EX_APPWINDOW style, the child (i.e. owned) frames
            // wouldn't appear in it
            if ( (style & wxFRAME_TOOL_WINDOW) || (style & wxFRAME_NO_TASKBAR) )
                *exflags |= WS_EX_TOOLWINDOW;
            else if ( !(style & wxFRAME_NO_TASKBAR) )
                *exflags |= WS_EX_APPWINDOW;
        }
#endif // !Win16

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

#ifdef __WIN32__
      if ( m_exStyle & wxFRAME_EX_CONTEXTHELP )
        *exflags |= WS_EX_CONTEXTHELP;
#endif // __WIN32__
    }

    return msflags;
}

bool wxTopLevelWindowMSW::CreateDialog(const wxChar *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();

        // but don't use the window which is currently hidden as then the
        // dialog would be hidden as well
        if ( parent && !parent->IsShown() )
        {
            parent = NULL;
        }
    }

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

    if ( !m_hWnd )
    {
        wxFAIL_MSG(_("Did you forget to include wx/msw/wx.rc in your resources?"));

        wxLogSysError(_("Can't create dialog using template '%s'"), dlgTemplate);

        return FALSE;
    }

    long exflags;
    (void)MSWGetCreateWindowFlags(&exflags);

    if ( exflags )
    {
        ::SetWindowLong(GetHwnd(), GWL_EXSTYLE, exflags);
        ::SetWindowPos(GetHwnd(), NULL, 0, 0, 0, 0,
                       SWP_NOSIZE |
                       SWP_NOMOVE |
                       SWP_NOZORDER |
                       SWP_NOACTIVATE);
    }

#if defined(__WIN95__)
    // 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));
            }
        }
    }
#endif // __WIN95__

    // move the dialog to its initial position without forcing repainting
    int x, y, w, h;
    if ( MSWGetCreateWindowCoords(pos, size, x, y, w, h) )
    {
        // we can't use CW_USEDEFAULT here as we're not calling CreateWindow()
        // and passing CW_USEDEFAULT to MoveWindow() results in resizing the
        // window to (0, 0) size which breaks quite a lot of things, e.g. the
        // sizer calculation in wxSizer::Fit()
        if ( w == CW_USEDEFAULT )
        {
            // the exact number doesn't matter, the dialog will be resized
            // again soon anyhow but it should be big enough to allow
            // calculation relying on "totalSize - clientSize > 0" work, i.e.
            // at least greater than the title bar height
            w =
            h = 100;
        }

        if ( x == CW_USEDEFAULT )
        {
            // well, where should we put it? maybe centre it on screen?
            x =
            y = 0;
        }

        if ( !::MoveWindow(GetHwnd(), x, y, w, h, FALSE) )
        {
            wxLogLastError(wxT("MoveWindow"));
        }
    }
    //else: leave it at default position

    if ( !title.empty() )
    {
        ::SetWindowText(GetHwnd(), title);
    }

    SubclassWin(m_hWnd);

    return TRUE;
#endif // __WXMICROWIN__/!__WXMICROWIN__
}

bool wxTopLevelWindowMSW::CreateFrame(const wxString& title,
                                      const wxPoint& pos,
                                      const wxSize& size)
{
    long exflags;
    long flags = MSWGetCreateWindowFlags(&exflags);

    return MSWCreate(wxCanvasClassName, title, pos, size, flags, exflags);
}

bool wxTopLevelWindowMSW::Create(wxWindow *parent,
                                 wxWindowID id,
                                 const wxString& title,
                                 const wxPoint& pos,
                                 const wxSize& size,
                                 long style,
                                 const wxString& name)
{
    // init our fields
    Init();

    m_windowStyle = style;

    SetName(name);

    m_windowId = id == -1 ? NewControlId() : id;

    wxTopLevelWindows.Append(this);

    if ( parent )
        parent->AddChild(this);

    if ( GetExtraStyle() & wxTOPLEVEL_EX_DIALOG )
    {
        // TODO: it would be better to construct the dialog template in memory
        //       during run-time than to rely on the limited number of
        //       templates in wx.rc because:
        //          a) you wouldn't have to include wx.rc in all wxWin programs
        //             (and the number of complaints about it would dtop)
        //          b) we'd be able to provide more templates simply, i.e.
        //             we could generate the templates for all style
        //             combinations

        // we have different dialog templates to allows creation of dialogs
        // with & without captions under MSWindows, resizeable or not (but a
        // resizeable dialog always has caption - otherwise it would look too
        // strange)
        const wxChar *dlgTemplate;
        if ( style & wxRESIZE_BORDER )
            dlgTemplate = wxT("wxResizeableDialog");
        else if ( style & wxCAPTION )
            dlgTemplate = wxT("wxCaptionDialog");
        else
            dlgTemplate = wxT("wxNoCaptionDialog");

        return CreateDialog(dlgTemplate, title, pos, size);
    }
    else // !dialog
    {
        return CreateFrame(title, pos, size);
    }
}

wxTopLevelWindowMSW::~wxTopLevelWindowMSW()
{
    wxTopLevelWindows.DeleteObject(this);

    if ( wxModelessWindows.Find(this) )
        wxModelessWindows.DeleteObject(this);

    // If this is the last top-level window, exit.
    if ( wxTheApp && (wxTopLevelWindows.Number() == 0) )
    {
        wxTheApp->SetTopWindow(NULL);

        if ( wxTheApp->GetExitOnFrameDelete() )
        {
            ::PostQuitMessage(0);
        }
    }
}

// ----------------------------------------------------------------------------
// wxTopLevelWindowMSW geometry
// ----------------------------------------------------------------------------

void wxTopLevelWindowMSW::DoSetClientSize(int width, int height)
{
    HWND hWnd = GetHwnd();

    RECT rectClient;
    ::GetClientRect(hWnd, &rectClient);

    RECT rectTotal;
    ::GetWindowRect(hWnd, &rectTotal);

    // Find the difference between the entire window (title bar and all)
    // and the client area; add this to the new client size to move the
    // window
    width += rectTotal.right - rectTotal.left - rectClient.right;
    height += rectTotal.bottom - rectTotal.top - rectClient.bottom;

    // note that calling GetClientAreaOrigin() takes the toolbar into account
    wxPoint pt = GetClientAreaOrigin();
    width += pt.x;
    height += pt.y;

    if ( !::MoveWindow(hWnd, rectTotal.left, rectTotal.top,
                       width, height, TRUE /* redraw */) )
    {
        wxLogLastError(_T("MoveWindow"));
    }

    wxSizeEvent event(wxSize(width, height), m_windowId);
    event.SetEventObject(this);
    (void)GetEventHandler()->ProcessEvent(event);
}

// ----------------------------------------------------------------------------
// wxTopLevelWindowMSW showing
// ----------------------------------------------------------------------------

void wxTopLevelWindowMSW::DoShowWindow(int nShowCmd)
{
    ::ShowWindow(GetHwnd(), nShowCmd);

    m_iconized = nShowCmd == SW_MINIMIZE;
}

bool wxTopLevelWindowMSW::Show(bool show)
{
    // don't use wxWindow version as we want to call DoShowWindow() ourselves
    if ( !wxWindowBase::Show(show) )
        return FALSE;

    int nShowCmd;
    if ( show )
    {
        if ( m_maximizeOnShow )
        {
            // show and maximize
            nShowCmd = SW_MAXIMIZE;

            m_maximizeOnShow = FALSE;
        }
        else // just show
        {
            nShowCmd = SW_SHOW;
        }
    }
    else // hide
    {
        nShowCmd = SW_HIDE;
    }

    DoShowWindow(nShowCmd);

    if ( show )
    {
        ::BringWindowToTop(GetHwnd());

        wxActivateEvent event(wxEVT_ACTIVATE, TRUE, m_windowId);
        event.SetEventObject( this );
        GetEventHandler()->ProcessEvent(event);
    }
    else // hide
    {
        // Try to highlight the correct window (the parent)
        if ( GetParent() )
        {
            HWND hWndParent = GetHwndOf(GetParent());
            if (hWndParent)
                ::BringWindowToTop(hWndParent);
        }
    }

    return TRUE;
}

// ----------------------------------------------------------------------------
// wxTopLevelWindowMSW maximize/minimize
// ----------------------------------------------------------------------------

void wxTopLevelWindowMSW::Maximize(bool maximize)
{
    if ( IsShown() )
    {
        // just maximize it directly
        DoShowWindow(maximize ? SW_MAXIMIZE : SW_RESTORE);
    }
    else // hidden
    {
        // we can't maximize the hidden frame because it shows it as well, so
        // just remember that we should do it later in this case
        m_maximizeOnShow = TRUE;
    }
}

bool wxTopLevelWindowMSW::IsMaximized() const
{
    return ::IsZoomed(GetHwnd()) != 0;
}

void wxTopLevelWindowMSW::Iconize(bool iconize)
{
    DoShowWindow(iconize ? SW_MINIMIZE : SW_RESTORE);
}

bool wxTopLevelWindowMSW::IsIconized() const
{
    // also update the current state
    ((wxTopLevelWindowMSW *)this)->m_iconized = ::IsIconic(GetHwnd()) != 0;

    return m_iconized;
}

void wxTopLevelWindowMSW::Restore()
{
    DoShowWindow(SW_RESTORE);
}

// ----------------------------------------------------------------------------
// wxTopLevelWindowMSW fullscreen
// ----------------------------------------------------------------------------

bool wxTopLevelWindowMSW::ShowFullScreen(bool show, long style)
{
    if (show)
    {
        if (IsFullScreen())
            return FALSE;

        m_fsIsShowing = TRUE;
        m_fsStyle = style;

        // zap the frame borders

        // save the 'normal' window style
        m_fsOldWindowStyle = GetWindowLong((HWND)GetHWND(), GWL_STYLE);

        // save the old position, width & height, maximize state
        m_fsOldSize = GetRect();
        m_fsIsMaximized = IsMaximized();

        // decide which window style flags to turn off
        LONG newStyle = m_fsOldWindowStyle;
        LONG offFlags = 0;

        if (style & wxFULLSCREEN_NOBORDER)
            offFlags |= WS_BORDER | WS_THICKFRAME;
        if (style & wxFULLSCREEN_NOCAPTION)
            offFlags |= (WS_CAPTION | WS_SYSMENU);

        newStyle &= (~offFlags);

        // change our window style to be compatible with full-screen mode
        ::SetWindowLong((HWND)GetHWND(), GWL_STYLE, newStyle);

        // resize to the size of the desktop
        int width, height;

        RECT rect = wxGetWindowRect(::GetDesktopWindow());
        width = rect.right - rect.left;
        height = rect.bottom - rect.top;

        SetSize(width, height);

        // now flush the window style cache and actually go full-screen
        SetWindowPos((HWND)GetHWND(), HWND_TOP, 0, 0, width, height, SWP_FRAMECHANGED);

        wxSizeEvent event(wxSize(width, height), GetId());
        GetEventHandler()->ProcessEvent(event);

        return TRUE;
    }
    else
    {
        if (!IsFullScreen())
            return FALSE;

        m_fsIsShowing = FALSE;

        Maximize(m_fsIsMaximized);
        SetWindowLong((HWND)GetHWND(),GWL_STYLE, m_fsOldWindowStyle);
        SetWindowPos((HWND)GetHWND(),HWND_TOP,m_fsOldSize.x, m_fsOldSize.y,
            m_fsOldSize.width, m_fsOldSize.height, SWP_FRAMECHANGED);

        return TRUE;
    }
}

// ----------------------------------------------------------------------------
// wxTopLevelWindowMSW misc
// ----------------------------------------------------------------------------

void wxTopLevelWindowMSW::SetIcon(const wxIcon& icon)
{
    // this sets m_icon
    wxTopLevelWindowBase::SetIcon(icon);

#if defined(__WIN95__) && !defined(__WXMICROWIN__)
    if ( m_icon.Ok() )
    {
        ::SendMessage(GetHwnd(), WM_SETICON,
                      (WPARAM)TRUE, (LPARAM)GetHiconOf(m_icon));
    }
#endif // __WIN95__
}

bool wxTopLevelWindowMSW::EnableCloseButton(bool enable)
{
#ifndef __WXMICROWIN__
    // get system (a.k.a. window) menu
    HMENU hmenu = ::GetSystemMenu(GetHwnd(), FALSE /* get it */);
    if ( !hmenu )
    {
        wxLogLastError(_T("GetSystemMenu"));

        return FALSE;
    }

    // enabling/disabling the close item from it also automatically
    // disables/enables the close title bar button
    if ( !::EnableMenuItem(hmenu, SC_CLOSE,
                           MF_BYCOMMAND | (enable ? MF_ENABLED : MF_GRAYED)) )
    {
        wxLogLastError(_T("EnableMenuItem(SC_CLOSE)"));

        return FALSE;
    }

    // update appearance immediately
    if ( !::DrawMenuBar(GetHwnd()) )
    {
        wxLogLastError(_T("DrawMenuBar"));
    }
#endif // !__WXMICROWIN__

    return TRUE;
}