window.h

wxGTK 是 wxWidgets 的 linux GTK+ (>2.2.3)版本。wxWidgets 是一个跨平台的 GUI 框架

/////////////////////////////////////////////////////////////////////////////
// Name:        wx/gtk/window.h
// Purpose:
// Author:      Robert Roebling
// Id:          $Id: window.h,v 1.160 2006/10/09 16:38:57 VZ Exp $
// Copyright:   (c) 1998 Robert Roebling
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifndef _WX_GTK_WINDOW_H_
#define _WX_GTK_WINDOW_H_

#include "wx/dynarray.h"

// helper structure that holds class that holds GtkIMContext object and
// some additional data needed for key events processing
struct wxGtkIMData;

WX_DEFINE_EXPORTED_ARRAY_PTR(GdkWindow *, wxArrayGdkWindows);

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

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

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

class WXDLLIMPEXP_CORE 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 void SetLabel(const wxString& WXUNUSED(label)) { }
    virtual wxString GetLabel() const { return wxEmptyString; }

    virtual bool Destroy();

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

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

    virtual void SetWindowStyleFlag( long style );

    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 Refresh( bool eraseBackground = true,
                          const wxRect *rect = (const wxRect *) NULL );
    virtual void Update();
    virtual void ClearBackground();

    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 bool SetBackgroundStyle(wxBackgroundStyle style) ;

    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;

    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 );
    virtual bool ScrollLines(int lines);
    virtual bool ScrollPages(int pages);

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

    virtual void AddChild( wxWindowBase *child );
    virtual void RemoveChild( wxWindowBase *child );

    virtual void SetLayoutDirection(wxLayoutDirection dir);
    virtual wxLayoutDirection GetLayoutDirection() const;
    virtual wxCoord AdjustForLayoutDirection(wxCoord x,
                                             wxCoord width,
                                             wxCoord widthTotal) const;

    virtual bool DoIsExposed( int x, int y ) const;
    virtual bool DoIsExposed( int x, int y, int w, int h ) const;

    // currently wxGTK2-only
    void SetDoubleBuffered(bool on);
    virtual bool IsDoubleBuffered() const;

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

    virtual WXWidget GetHandle() const { return m_widget; }

    // many important things are done here, this function must be called
    // regularly
    virtual void OnInternalIdle();

    // Internal represention of Update()
    void GtkUpdate();

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

    // wxGTK-specific: called recursively by Enable,
    // to give widgets an opportunity 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);

    // This methods sends wxPaintEvents to the window. It reads the
    // update region, breaks it up into rects and sends an event
    // for each rect. It is also responsible for background erase
    // events and NC paint events. It is called from "draw" and
    // "expose" handlers as well as from ::Update()
    void GtkSendPaintEvents();

    // 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 not 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();
    void ConnectWidget( GtkWidget *widget );

    // Called from several event handlers, if it returns true or false, the
    // same value should be immediately returned by the handler without doing
    // anything else. If it returns -1, the handler should continue as usual
    int GTKCallbackCommonPrologue(struct _GdkEventAny *event) const;

    // override this if some events should never be consumed by wxWidgets but
    // but have to be left for the native control
    //
    // base version just does GetEventHandler()->ProcessEvent()
    virtual bool GTKProcessEvent(wxEvent& event) const;

    // Map GTK widget direction of the given widget to/from wxLayoutDirection
    static wxLayoutDirection GTKGetLayout(GtkWidget *widget);
    static void GTKSetLayout(GtkWidget *widget, wxLayoutDirection dir);

protected:
    // Override GTKWidgetNeedsMnemonic and return true if your
    // needs to set its mnemonic widget, such as for a 
    // GtkLabel for wxStaticText, then do the actual
    // setting of the widget inside GTKWidgetDoSetMnemonic
    virtual bool GTKWidgetNeedsMnemonic() const;
    virtual void GTKWidgetDoSetMnemonic(GtkWidget* w);

    // Get the GdkWindows making part of this window: usually there will be
    // only one of them in which case it should be returned directly by this
    // function. If there is more than one GdkWindow (can be the case for
    // composite widgets), return NULL and fill in the provided array