Set initial window size as its minimal size.

[wxWidgets.git] / include / wx / toplevel.h

///////////////////////////////////////////////////////////////////////////////
// Name:        wx/toplevel.h
// Purpose:     declares wxTopLevelWindow class, the base class for all
//              top level windows (such as frames and dialogs)
// Author:      Vadim Zeitlin, Vaclav Slavik
// Modified by:
// Created:     06.08.01
// RCS-ID:      $Id$
// Copyright:   (c) 2001 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
//                       Vaclav Slavik <vaclav@wxwidgets.org>
// Licence:     wxWindows licence
///////////////////////////////////////////////////////////////////////////////

#ifndef _WX_TOPLEVEL_BASE_H_
#define _WX_TOPLEVEL_BASE_H_

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

#include "wx/nonownedwnd.h"
#include "wx/iconbndl.h"
#include "wx/containr.h"
#include "wx/weakref.h"

// the default names for various classes
extern WXDLLIMPEXP_DATA_CORE(const char) wxFrameNameStr[];

class WXDLLIMPEXP_FWD_CORE wxTopLevelWindowBase;

// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------

// style common to both wxFrame and wxDialog
#define wxSTAY_ON_TOP           0x8000
#define wxICONIZE               0x4000
#define wxMINIMIZE              wxICONIZE
#define wxMAXIMIZE              0x2000
#define wxCLOSE_BOX             0x1000

#define wxSYSTEM_MENU           0x0800
#define wxMINIMIZE_BOX          0x0400
#define wxMAXIMIZE_BOX          0x0200
#define wxTINY_CAPTION_HORIZ    0x0100
#define wxTINY_CAPTION_VERT     0x0080
#define wxRESIZE_BORDER         0x0040

#if WXWIN_COMPATIBILITY_2_6

    // deprecated versions defined for compatibility reasons
    #define wxRESIZE_BOX            wxMAXIMIZE_BOX
    #define wxTHICK_FRAME           wxRESIZE_BORDER

    // obsolete styles, unused any more
    #define wxDIALOG_MODAL          0
    #define wxDIALOG_MODELESS       0
    #define wxNO_3D                 0
    #define wxUSER_COLOURS          0

#endif // WXWIN_COMPATIBILITY_2_6

// default style
//
// under Windows CE (at least when compiling with eVC 4) we should create
// top level windows without any styles at all for them to appear
// "correctly", i.e. as full screen windows with a "hide" button (same as
// "close" but round instead of squared and just hides the applications
// instead of closing it) in the title bar
#if defined(__WXWINCE__)
    #if defined(__SMARTPHONE__)
        #define wxDEFAULT_FRAME_STYLE (wxMAXIMIZE)
    #elif defined(__WINCE_STANDARDSDK__)
        #define wxDEFAULT_FRAME_STYLE (wxMAXIMIZE|wxCLOSE_BOX)
    #else
        #define wxDEFAULT_FRAME_STYLE (wxNO_BORDER)
    #endif
#else // !__WXWINCE__
    #define wxDEFAULT_FRAME_STYLE \
            (wxSYSTEM_MENU | \
             wxRESIZE_BORDER | \
             wxMINIMIZE_BOX | \
             wxMAXIMIZE_BOX | \
             wxCLOSE_BOX | \
             wxCAPTION | \
             wxCLIP_CHILDREN)
#endif


// Dialogs are created in a special way
#define wxTOPLEVEL_EX_DIALOG        0x00000008

// Styles for ShowFullScreen
// (note that wxTopLevelWindow only handles wxFULLSCREEN_NOBORDER and
//  wxFULLSCREEN_NOCAPTION; the rest is handled by wxTopLevelWindow)
enum
{
    wxFULLSCREEN_NOMENUBAR   = 0x0001,
    wxFULLSCREEN_NOTOOLBAR   = 0x0002,
    wxFULLSCREEN_NOSTATUSBAR = 0x0004,
    wxFULLSCREEN_NOBORDER    = 0x0008,
    wxFULLSCREEN_NOCAPTION   = 0x0010,

    wxFULLSCREEN_ALL         = wxFULLSCREEN_NOMENUBAR | wxFULLSCREEN_NOTOOLBAR |
                               wxFULLSCREEN_NOSTATUSBAR | wxFULLSCREEN_NOBORDER |
                               wxFULLSCREEN_NOCAPTION
};

// Styles for RequestUserAttention
enum
{
    wxUSER_ATTENTION_INFO = 1,
    wxUSER_ATTENTION_ERROR = 2
};

// ----------------------------------------------------------------------------
// wxTopLevelWindow: a top level (as opposed to child) window
// ----------------------------------------------------------------------------

class WXDLLIMPEXP_CORE wxTopLevelWindowBase : public wxNonOwnedWindow
{
public:
    // construction
    wxTopLevelWindowBase();
    virtual ~wxTopLevelWindowBase();

    // top level wnd state
    // --------------------

    // maximize = true => maximize, otherwise - restore
    virtual void Maximize(bool maximize = true) = 0;

    // undo Maximize() or Iconize()
    virtual void Restore() = 0;

    // iconize = true => iconize, otherwise - restore
    virtual void Iconize(bool iconize = true) = 0;

    // return true if the frame is maximized
    virtual bool IsMaximized() const = 0;

    // return true if the frame is always maximized
    // due to native guidelines or current policy
    virtual bool IsAlwaysMaximized() const;

    // return true if the frame is iconized
    virtual bool IsIconized() const = 0;

    // get the frame icon
    wxIcon GetIcon() const;

    // get the frame icons
    const wxIconBundle& GetIcons() const { return m_icons; }

    // set the frame icon: implemented in terms of SetIcons()
    void SetIcon(const wxIcon& icon);

    // set the frame icons
    virtual void SetIcons(const wxIconBundle& icons) { m_icons = icons; }

    // maximize the window to cover entire screen
    virtual bool ShowFullScreen(bool show, long style = wxFULLSCREEN_ALL) = 0;
    
    // shows the window, but doesn't activate it. If the base code is being run,
    // it means the port doesn't implement this method yet and so alert the user.
    virtual void ShowWithoutActivating() { 
        wxFAIL_MSG("ShowWithoutActivating not implemented on this platform.");
    }

    // return true if the frame is in fullscreen mode
    virtual bool IsFullScreen() const = 0;

    // the title of the top level window: the text which the
    // window shows usually at the top of the frame/dialog in dedicated bar
    virtual void SetTitle(const wxString& title) = 0;
    virtual wxString GetTitle() const = 0;

    // enable/disable close button [x]
    virtual bool EnableCloseButton(bool WXUNUSED(enable) ) { return false; }

    // Set the shape of the window to the given region.
    // Returns true if the platform supports this feature (and the
    // operation is successful.)
    virtual bool SetShape(const wxRegion& WXUNUSED(region)) { return false; }

    // Attracts the users attention to this window if the application is
    // inactive (should be called when a background event occurs)
    virtual void RequestUserAttention(int flags = wxUSER_ATTENTION_INFO);

    // Is this the active frame (highlighted in the taskbar)?
    virtual bool IsActive() { return wxGetTopLevelParent(FindFocus()) == this; }

    // this function may be overridden to return false to allow closing the
    // application even when this top level window is still open
    //
    // notice that the window is still closed prior to the application exit and
    // so it can still veto it even if it returns false from here
    virtual bool ShouldPreventAppExit() const { return true; }


#if defined(__SMARTPHONE__)
    virtual void SetLeftMenu(int id = wxID_ANY, const wxString& label = wxEmptyString, wxMenu *subMenu = NULL) = 0;
    virtual void SetRightMenu(int id = wxID_ANY, const wxString& label = wxEmptyString, wxMenu *subMenu = NULL) = 0;
#endif // __SMARTPHONE__

    // centre the window on screen: this is just a shortcut
    void CentreOnScreen(int dir = wxBOTH) { DoCentre(dir | wxCENTRE_ON_SCREEN); }
    void CenterOnScreen(int dir = wxBOTH) { CentreOnScreen(dir); }


    // default item access: we have a permanent default item which is the one
    // set by the user code but we may also have a temporary default item which
    // would be chosen if the user pressed "Enter" now but the default action
    // reverts to the "permanent" default as soon as this temporary default
    // item loses focus

    // get the default item, temporary or permanent
    wxWindow *GetDefaultItem() const
        { return m_winTmpDefault ? m_winTmpDefault : m_winDefault; }

    // set the permanent default item, return the old default
    wxWindow *SetDefaultItem(wxWindow *win)
        { wxWindow *old = GetDefaultItem(); m_winDefault = win; return old; }

    // return the temporary default item, can be NULL
    wxWindow *GetTmpDefaultItem() const { return m_winTmpDefault; }

    // set a temporary default item, SetTmpDefaultItem(NULL) should be called
    // soon after a call to SetTmpDefaultItem(window), return the old default
    wxWindow *SetTmpDefaultItem(wxWindow *win)
        { wxWindow *old = GetDefaultItem(); m_winTmpDefault = win; return old; }


    // implementation only from now on
    // -------------------------------

    // override some base class virtuals
    virtual bool Destroy();
    virtual bool IsTopLevel() const { return true; }
    virtual bool IsVisible() const { return IsShown(); }

    // event handlers
    void OnCloseWindow(wxCloseEvent& event);
    void OnSize(wxSizeEvent& WXUNUSED(event)) { DoLayout(); }

    // Get rect to be used to center top-level children
    virtual void GetRectForTopLevelChildren(int *x, int *y, int *w, int *h);

    // this should go away, but for now it's called from docview.cpp,
    // so should be there for all platforms
    void OnActivate(wxActivateEvent &WXUNUSED(event)) { }

    // do the window-specific processing after processing the update event
    virtual void DoUpdateWindowUI(wxUpdateUIEvent& event) ;

    // a different API for SetSizeHints
    virtual void SetMinSize(const wxSize& minSize);
    virtual void SetMaxSize(const wxSize& maxSize);
    
    virtual void SetModified(bool modified) { m_modified = modified; }
    virtual bool GetModified() const { return m_modified; }

protected:
    // the frame client to screen translation should take account of the
    // toolbar which may shift the origin of the client area
    virtual void DoClientToScreen(int *x, int *y) const;
    virtual void DoScreenToClient(int *x, int *y) const;

    // add support for wxCENTRE_ON_SCREEN
    virtual void DoCentre(int dir);

    // no need to do client to screen translation to get our position in screen
    // coordinates: this is already the case
    virtual void DoGetScreenPosition(int *x, int *y) const
    {
        DoGetPosition(x, y);
    }

    // test whether this window makes part of the frame
    // (menubar, toolbar and statusbar are excluded from automatic layout)
    virtual bool IsOneOfBars(const wxWindow *WXUNUSED(win)) const
        { return false; }

    // check if we should exit the program after deleting this window
    bool IsLastBeforeExit() const;

    // send the iconize event, return true if processed
    bool SendIconizeEvent(bool iconized = true);

    // do TLW-specific layout: we resize our unique child to fill the entire
    // client area
    void DoLayout();

    // Get the default size for the new window if no explicit size given. If
    // there are better default sizes then these can be changed, just as long
    // as they are not too small for TLWs (and not larger than screen).
    static wxSize GetDefaultSize();
    static int WidthDefault(int w) { return w == wxDefaultCoord ? GetDefaultSize().x : w; }
    static int HeightDefault(int h) { return h == wxDefaultCoord ? GetDefaultSize().y : h; }


    // the frame icon
    wxIconBundle m_icons;

    // a default window (usually a button) or NULL
    wxWindowRef m_winDefault;

    // a temporary override of m_winDefault, use the latter if NULL
    wxWindowRef m_winTmpDefault;
    
    bool m_modified;

    wxDECLARE_NO_COPY_CLASS(wxTopLevelWindowBase);
    DECLARE_EVENT_TABLE()
    WX_DECLARE_CONTROL_CONTAINER();
};


// include the real class declaration
#if defined(__WXPALMOS__)
    #include "wx/palmos/toplevel.h"
    #define wxTopLevelWindowNative wxTopLevelWindowPalm
#elif defined(__WXMSW__)
    #include "wx/msw/toplevel.h"
    #define wxTopLevelWindowNative wxTopLevelWindowMSW
#elif defined(__WXGTK20__)
    #include "wx/gtk/toplevel.h"
    #define wxTopLevelWindowNative wxTopLevelWindowGTK
#elif defined(__WXGTK__)
    #include "wx/gtk1/toplevel.h"
    #define wxTopLevelWindowNative wxTopLevelWindowGTK
#elif defined(__WXX11__)
    #include "wx/x11/toplevel.h"
    #define wxTopLevelWindowNative wxTopLevelWindowX11
#elif defined(__WXMGL__)
    #include "wx/mgl/toplevel.h"
    #define wxTopLevelWindowNative wxTopLevelWindowMGL
#elif defined(__WXDFB__)
    #include "wx/dfb/toplevel.h"
    #define wxTopLevelWindowNative wxTopLevelWindowDFB
#elif defined(__WXMAC__)
    #include "wx/osx/toplevel.h"
    #define wxTopLevelWindowNative wxTopLevelWindowMac
#elif defined(__WXCOCOA__)
    #include "wx/cocoa/toplevel.h"
    #define wxTopLevelWindowNative wxTopLevelWindowCocoa
#elif defined(__WXPM__)
    #include "wx/os2/toplevel.h"
    #define wxTopLevelWindowNative wxTopLevelWindowOS2
#elif defined(__WXMOTIF__)
    #include "wx/motif/toplevel.h"
    #define wxTopLevelWindowNative wxTopLevelWindowMotif
#endif

#ifdef __WXUNIVERSAL__
    #include "wx/univ/toplevel.h"
#else // !__WXUNIVERSAL__
    class WXDLLIMPEXP_CORE wxTopLevelWindow : public wxTopLevelWindowNative
    {
    public:
        // construction
        wxTopLevelWindow() { }
        wxTopLevelWindow(wxWindow *parent,
                   wxWindowID winid,
                   const wxString& title,
                   const wxPoint& pos = wxDefaultPosition,
                   const wxSize& size = wxDefaultSize,
                   long style = wxDEFAULT_FRAME_STYLE,
                   const wxString& name = wxFrameNameStr)
            : wxTopLevelWindowNative(parent, winid, title,
                                     pos, size, style, name)
        {
        }

        DECLARE_DYNAMIC_CLASS_NO_COPY(wxTopLevelWindow)
    };
#endif // __WXUNIVERSAL__/!__WXUNIVERSAL__

#endif // _WX_TOPLEVEL_BASE_H_