wxWidgets/include/wx/gtk/window.h

/////////////////////////////////////////////////////////////////////////////
// Name:        wx/gtk/window.h
// Purpose:
// Author:      Robert Roebling
// Id:          $Id$
// Copyright:   (c) 1998 Robert Roebling
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////


#ifndef __GTKWINDOWH__
#define __GTKWINDOWH__

#ifdef __GNUG__
    #pragma interface
#endif

//-----------------------------------------------------------------------------
// callback definition for inserting a window (internal)
//-----------------------------------------------------------------------------

class wxWindowGTK;
typedef void (*wxInsertChildFunction)( wxWindowGTK*, wxWindowGTK* );

//-----------------------------------------------------------------------------
// wxWindowGTK
//-----------------------------------------------------------------------------

class wxWindowGTK : public wxWindowBase
{
public:
    // creating the window
    // -------------------
    wxWindowGTK();
    wxWindowGTK(wxWindow *parent,
                wxWindowID id,
                const wxPoint& pos = wxDefaultPosition,
                const wxSize& size = wxDefaultSize,
                long style = 0,
                const wxString& name = wxPanelNameStr);
    bool Create(wxWindow *parent,
                wxWindowID id,
                const wxPoint& pos = wxDefaultPosition,
                const wxSize& size = wxDefaultSize,
                long style = 0,
                const wxString& name = wxPanelNameStr);
    virtual ~wxWindowGTK();

    // implement base class (pure) virtual methods
    // -------------------------------------------

    virtual bool Destroy();

    virtual void Raise();
    virtual void Lower();

    virtual bool Show( bool show = TRUE );
    virtual bool Enable( bool enable = TRUE );

    virtual bool IsRetained() const;

    virtual void SetFocus();
    virtual bool AcceptsFocus() const;

    virtual bool Reparent( wxWindowBase *newParent );

    virtual void WarpPointer(int x, int y);
    virtual void CaptureMouse();
    virtual void ReleaseMouse();

    virtual void Refresh( bool eraseBackground = TRUE,
                          const wxRect *rect = (const wxRect *) NULL );
    virtual void Clear();

    virtual bool SetBackgroundColour( const wxColour &colour );
    virtual bool SetForegroundColour( const wxColour &colour );
    virtual bool SetCursor( const wxCursor &cursor );
    virtual bool SetFont( const wxFont &font );

    virtual int GetCharHeight() const;
    virtual int GetCharWidth() const;
    virtual void GetTextExtent(const wxString& string,
                               int *x, int *y,
                               int *descent = (int *) NULL,
                               int *externalLeading = (int *) NULL,
                               const wxFont *theFont = (const wxFont *) NULL)
                               const;

#if wxUSE_MENUS_NATIVE
    virtual bool DoPopupMenu( wxMenu *menu, int x, int y );
#endif // wxUSE_MENUS_NATIVE

    virtual void SetScrollbar( int orient, int pos, int thumbVisible,
                               int range, bool refresh = TRUE );
    virtual void SetScrollPos( int orient, int pos, bool refresh = TRUE );
    virtual int GetScrollPos( int orient ) const;
    virtual int GetScrollThumb( int orient ) const;
    virtual int GetScrollRange( int orient ) const;
    virtual void ScrollWindow( int dx, int dy,
                               const wxRect* rect = (wxRect *) NULL );

#if wxUSE_DRAG_AND_DROP
    virtual void SetDropTarget( wxDropTarget *dropTarget );
#endif // wxUSE_DRAG_AND_DROP

    // implementation
    // --------------

    virtual WXWidget GetHandle() const { return m_widget; }

    /* I don't want users to override what's done in idle so everything that
       has to be done in idle time in order for wxGTK to work is done in
       OnInternalIdle */
    virtual void OnInternalIdle();

    /* For compatibility across platforms (not in event table) */
    void OnIdle(wxIdleEvent& WXUNUSED(event)) {};

    // wxGTK-specific: called recursively by Enable,
    // to give widgets an oppprtunity to correct their colours after they
    // have been changed by Enable
    virtual void OnParentEnable( bool WXUNUSED(enable) ) {};

    /* used by all window classes in the widget creation process */
    bool PreCreation( wxWindowGTK *parent, const wxPoint &pos, const wxSize &size );
    void PostCreation();

    /* internal addition of child windows. differs from class
       to class not by using virtual functions but by using
       the m_insertCallback */
    void DoAddChild(wxWindowGTK *child);

    /* the methods below are required because many native widgets
       are composed of several subwidgets and setting a style for
       the widget means setting it for all subwidgets as well.
       also, it is nor clear, which native widget is the top
       widget where (most of) the input goes. even tooltips have
       to be applied to all subwidgets. */

    virtual GtkWidget* GetConnectWidget();
    virtual bool IsOwnGtkWindow( GdkWindow *window );
    void ConnectWidget( GtkWidget *widget );

    /* creates a new widget style if none is there
       and sets m_widgetStyle to this value. */
    GtkStyle *GetWidgetStyle();

    /* called by SetFont() and SetXXXColour etc */
    void SetWidgetStyle();

    /* overridden in many GTK widgets */
    virtual void ApplyWidgetStyle();

#if wxUSE_TOOLTIPS
    virtual void ApplyToolTip( GtkTooltips *tips, const wxChar *tip );
#endif // wxUSE_TOOLTIPS

    // called from GTK signales handlers. it indicates that
    // the layouting functions have to be called later on
    // (i.e. in idle time, implemented in OnInternalIdle() ).
    void GtkUpdateSize() { m_sizeSet = FALSE; }

    // position and size of the window
    int                  m_x, m_y;
    int                  m_width, m_height;
    int                  m_oldClientWidth,m_oldClientHeight;

    // see the docs in src/gtk/window.cpp
    GtkWidget           *m_widget;          // mostly the widget seen by the rest of GTK
    GtkWidget           *m_wxwindow;        // mostly the client area as per wxWindows
    
    // this widget will be queried for GTK's focus events
    GtkWidget           *m_focusWidget;

#if HAVE_XIM
    // XIM support for wxWindows
    GdkIC               *m_ic;
    GdkICAttr           *m_icattr;
#endif

    // scrolling stuff
    GtkAdjustment       *m_hAdjust,*m_vAdjust;
    float                m_oldHorizontalPos;
    float                m_oldVerticalPos;

    // extra (wxGTK-specific) flags
    bool                 m_needParent:1;        // ! wxFrame, wxDialog, wxNotebookPage ?
    bool                 m_noExpose:1;          // wxGLCanvas has its own redrawing
    bool                 m_nativeSizeEvent:1;   // wxGLCanvas sends wxSizeEvent upon "alloc_size"
    bool                 m_hasScrolling:1;
    bool                 m_hasVMT:1;
    bool                 m_sizeSet:1;
    bool                 m_resizing:1;
    bool                 m_isStaticBox:1;       // faster than IS_KIND_OF
    bool                 m_isRadioButton:1;     // faster than IS_KIND_OF
    bool                 m_isListBox:1;         // faster than IS_KIND_OF
    bool                 m_isFrame:1;           // faster than IS_KIND_OF
    bool                 m_acceptsFocus:1;      // not wxStaticBox, not wxStaticBitmap etc.
    bool                 m_isScrolling;
    bool                 m_clipPaintRegion;     // TRUE after ScrollWindow()
    bool                 m_queuedFullRedraw;    // TRUE after DoMoveWindow

    // these are true if the style were set before the widget was realized
    // (typcally in the constructor) but the actual GTK style must not be set
    // before the widget has been "realized"
    bool                 m_delayedForegroundColour:1;
    bool                 m_delayedBackgroundColour:1;

    // contains GTK's widgets internal information about non-default widget
    // font and colours. we create one for each widget that gets any
    // non-default attribute set via SetFont() or SetForegroundColour() /
    // SetBackgroundColour().
    GtkStyle            *m_widgetStyle;

    // C++ has no virtual methods in the constrcutor of any class but we need
    // different methods of inserting a child window into a wxFrame,
    // wxMDIFrame, wxNotebook etc. this is the callback that will get used.
    wxInsertChildFunction  m_insertCallback;

    // implement the base class pure virtuals
    virtual void DoClientToScreen( int *x, int *y ) const;
    virtual void DoScreenToClient( int *x, int *y ) const;
    virtual void DoGetPosition( int *x, int *y ) const;
    virtual void DoGetSize( int *width, int *height ) const;
    virtual void DoGetClientSize( int *width, int *height ) const;
    virtual void DoSetSize(int x, int y,
                           int width, int height,
                           int sizeFlags = wxSIZE_AUTO);
    virtual void DoSetClientSize(int width, int height);
    virtual void DoMoveWindow(int x, int y, int width, int height);

#if wxUSE_TOOLTIPS
    virtual void DoSetToolTip( wxToolTip *tip );
#endif // wxUSE_TOOLTIPS

    // common part of all ctors (can't be virtual because called from ctor)
    void Init();

private:
    DECLARE_DYNAMIC_CLASS(wxWindowGTK)
    DECLARE_NO_COPY_CLASS(wxWindowGTK)
};

extern wxWindow *wxFindFocusedChild(wxWindowGTK *win);

#endif // __GTKWINDOWH__