htmlwin.h

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

    // Goes to previous/next page (in browsing history)
    // Returns true if successful, false otherwise
    bool HistoryBack();
    bool HistoryForward();
    bool HistoryCanBack();
    bool HistoryCanForward();
    // Resets history
    void HistoryClear();

    // Returns pointer to conteiners/cells structure.
    // It should be used ONLY when printing
    wxHtmlContainerCell* GetInternalRepresentation() const {return m_Cell;}

    // Adds input filter
    static void AddFilter(wxHtmlFilter *filter);

    // Returns a pointer to the parser.
    wxHtmlWinParser *GetParser() const { return m_Parser; }

    // Adds HTML processor to this instance of wxHtmlWindow:
    void AddProcessor(wxHtmlProcessor *processor);
    // Adds HTML processor to wxHtmlWindow class as whole:
    static void AddGlobalProcessor(wxHtmlProcessor *processor);


    // -- Callbacks --

    // Sets the title of the window
    // (depending on the information passed to SetRelatedFrame() method)
    virtual void OnSetTitle(const wxString& title);

    // Called when user clicked on hypertext link. Default behavior is to
    // call LoadPage(loc)
    virtual void OnLinkClicked(const wxHtmlLinkInfo& link);

    // Called when wxHtmlWindow wants to fetch data from an URL (e.g. when
    // loading a page or loading an image). The data are downloaded if and only if
    // OnOpeningURL returns true. If OnOpeningURL returns wxHTML_REDIRECT,
    // it must set *redirect to the new URL
    virtual wxHtmlOpeningStatus OnOpeningURL(wxHtmlURLType WXUNUSED(type),
                                             const wxString& WXUNUSED(url),
                                             wxString *WXUNUSED(redirect)) const
        { return wxHTML_OPEN; }

#if wxUSE_CLIPBOARD
    // Helper functions to select parts of page:
    void SelectWord(const wxPoint& pos);
    void SelectLine(const wxPoint& pos);
    void SelectAll();

    // Convert selection to text:
    wxString SelectionToText() { return DoSelectionToText(m_selection); }

    // Converts current page to text:
    wxString ToText();
#endif // wxUSE_CLIPBOARD

    virtual void OnInternalIdle();

    /// Returns standard HTML cursor as used by wxHtmlWindow
    static wxCursor GetDefaultHTMLCursor(HTMLCursor type);

protected:
    void Init();

    // Scrolls to anchor of this name. (Anchor is #news
    // or #features etc. it is part of address sometimes:
    // http://www.ms.mff.cuni.cz/~vsla8348/wxhtml/index.html#news)
    // Return value : true if anchor exists, false otherwise
    bool ScrollToAnchor(const wxString& anchor);

    // Prepares layout (= fill m_PosX, m_PosY for fragments) based on
    // actual size of window. This method also setup scrollbars
    void CreateLayout();

    void OnEraseBackground(wxEraseEvent& event);
    void OnPaint(wxPaintEvent& event);
    void OnSize(wxSizeEvent& event);
    void OnMouseMove(wxMouseEvent& event);
    void OnMouseDown(wxMouseEvent& event);
    void OnMouseUp(wxMouseEvent& event);
#if wxUSE_CLIPBOARD
    void OnKeyUp(wxKeyEvent& event);
    void OnDoubleClick(wxMouseEvent& event);
    void OnCopy(wxCommandEvent& event);
    void OnClipboardEvent(wxClipboardTextEvent& event);
    void OnMouseEnter(wxMouseEvent& event);
    void OnMouseLeave(wxMouseEvent& event);
    void OnMouseCaptureLost(wxMouseCaptureLostEvent& event);
#endif // wxUSE_CLIPBOARD

    // Returns new filter (will be stored into m_DefaultFilter variable)
    virtual wxHtmlFilter *GetDefaultFilter() {return new wxHtmlFilterPlainText;}

    // cleans static variables
    static void CleanUpStatics();

    // Returns true if text selection is enabled (wxClipboard must be available
    // and wxHW_NO_SELECTION not used)
    bool IsSelectionEnabled() const;

    enum ClipboardType
    {
        Primary,
        Secondary
    };

    // Copies selection to clipboard if the clipboard support is available
    //
    // returns true if anything was copied to clipboard, false otherwise
    bool CopySelection(ClipboardType t = Secondary);

#if wxUSE_CLIPBOARD
    // Automatic scrolling during selection:
    void StopAutoScrolling();
#endif // wxUSE_CLIPBOARD

    wxString DoSelectionToText(wxHtmlSelection *sel);

public:
    // wxHtmlWindowInterface methods:
    virtual void SetHTMLWindowTitle(const wxString& title);
    virtual void OnHTMLLinkClicked(const wxHtmlLinkInfo& link);
    virtual wxHtmlOpeningStatus OnHTMLOpeningURL(wxHtmlURLType type,
                                                 const wxString& url,
                                                 wxString *redirect) const;
    virtual wxPoint HTMLCoordsToWindow(wxHtmlCell *cell,
                                       const wxPoint& pos) const;
    virtual wxWindow* GetHTMLWindow();
    virtual wxColour GetHTMLBackgroundColour() const;
    virtual void SetHTMLBackgroundColour(const wxColour& clr);
    virtual void SetHTMLBackgroundImage(const wxBitmap& bmpBg);
    virtual void SetHTMLStatusText(const wxString& text);
    virtual wxCursor GetHTMLCursor(HTMLCursor type) const;

    // implementation of SetPage()
    bool DoSetPage(const wxString& source);

protected:
    // This is pointer to the first cell in parsed data.  (Note: the first cell
    // is usually top one = all other cells are sub-cells of this one)
    wxHtmlContainerCell *m_Cell;
    // parser which is used to parse HTML input.
    // Each wxHtmlWindow has it's own parser because sharing one global
    // parser would be problematic (because of reentrancy)
    wxHtmlWinParser *m_Parser;
    // contains name of actualy opened page or empty string if no page opened
    wxString m_OpenedPage;
    // contains name of current anchor within m_OpenedPage
    wxString m_OpenedAnchor;
    // contains title of actualy opened page or empty string if no <TITLE> tag
    wxString m_OpenedPageTitle;
    // class for opening files (file system)
    wxFileSystem* m_FS;

    wxFrame *m_RelatedFrame;
    wxString m_TitleFormat;
#if wxUSE_STATUSBAR
    // frame in which page title should be displayed & number of it's statusbar
    // reserved for usage with this html window
    int m_RelatedStatusBar;
#endif // wxUSE_STATUSBAR

    // borders (free space between text and window borders)
    // defaults to 10 pixels.
    int m_Borders;

    // current text selection or NULL
    wxHtmlSelection *m_selection;

    // true if the user is dragging mouse to select text
    bool m_makingSelection;

#if wxUSE_CLIPBOARD
    // time of the last doubleclick event, used to detect tripleclicks
    // (tripleclicks are used to select whole line):
    wxMilliClock_t m_lastDoubleClick;

    // helper class to automatically scroll the window if the user is selecting
    // text and the mouse leaves wxHtmlWindow:
    wxHtmlWinAutoScrollTimer *m_timerAutoScroll;
#endif // wxUSE_CLIPBOARD

private:
    // window content for double buffered rendering:
    wxBitmap *m_backBuffer;

    // background image, may be invalid
    wxBitmap m_bmpBg;

    // variables used when user is selecting text
    wxPoint     m_tmpSelFromPos;
    wxHtmlCell *m_tmpSelFromCell;

    // if >0 contents of the window is not redrawn
    // (in order to avoid ugly blinking)
    int m_tmpCanDrawLocks;

    // list of HTML filters
    static wxList m_Filters;
    // this filter is used when no filter is able to read some file
    static wxHtmlFilter *m_DefaultFilter;

    // html processors array:
    wxHtmlProcessorList *m_Processors;
    static wxHtmlProcessorList *m_GlobalProcessors;

    // browser history
    wxHtmlHistoryArray *m_History;
    int m_HistoryPos;
    // if this FLAG is false, items are not added to history
    bool m_HistoryOn;

    // a flag set if we need to erase background in OnPaint() (otherwise this
    // is supposed to have been done in OnEraseBackground())
    bool m_eraseBgInOnPaint;

    // standard mouse cursors
    static wxCursor *ms_cursorLink;
    static wxCursor *ms_cursorText;

    DECLARE_EVENT_TABLE()
    DECLARE_NO_COPY_CLASS(wxHtmlWindow)
};




BEGIN_DECLARE_EVENT_TYPES()
    DECLARE_EXPORTED_EVENT_TYPE(WXDLLIMPEXP_HTML,
                                wxEVT_COMMAND_HTML_CELL_CLICKED, 1000)
    DECLARE_EXPORTED_EVENT_TYPE(WXDLLIMPEXP_HTML,
                                wxEVT_COMMAND_HTML_CELL_HOVER, 1001)
    DECLARE_EXPORTED_EVENT_TYPE(WXDLLIMPEXP_HTML,
                                wxEVT_COMMAND_HTML_LINK_CLICKED, 1002)
END_DECLARE_EVENT_TYPES()


/*!
 * Html cell window event
 */

class WXDLLIMPEXP_HTML wxHtmlCellEvent : public wxCommandEvent
{
public:
    wxHtmlCellEvent() {}
    wxHtmlCellEvent(wxEventType commandType, int id,
                    wxHtmlCell *cell, const wxPoint &pt,
                    const wxMouseEvent &ev)
        : wxCommandEvent(commandType, id)
    {
        m_cell = cell;
        m_pt = pt;
        m_mouseEvent = ev;
        m_bLinkWasClicked = false;
    }

    wxHtmlCell* GetCell() const { return m_cell; }
    wxPoint GetPoint() const { return m_pt; }
    wxMouseEvent GetMouseEvent() const { return m_mouseEvent; }

    void SetLinkClicked(bool linkclicked) { m_bLinkWasClicked=linkclicked; }
    bool GetLinkClicked() const { return m_bLinkWasClicked; }

    // default copy ctor, assignment operator and dtor are ok
    virtual wxEvent *Clone() const { return new wxHtmlCellEvent(*this); }

private:
    wxHtmlCell *m_cell;
    wxMouseEvent m_mouseEvent;
    wxPoint m_pt;

    bool m_bLinkWasClicked;

    DECLARE_DYNAMIC_CLASS_NO_ASSIGN(wxHtmlCellEvent)
};



/*!
 * Html link event
 */

class WXDLLIMPEXP_HTML wxHtmlLinkEvent : public wxCommandEvent
{
public:
    wxHtmlLinkEvent() {}
    wxHtmlLinkEvent(int id, const wxHtmlLinkInfo &linkinfo)
        : wxCommandEvent(wxEVT_COMMAND_HTML_LINK_CLICKED, id)
    {
        m_linkInfo = linkinfo;
    }

    const wxHtmlLinkInfo &GetLinkInfo() const { return m_linkInfo; }

    // default copy ctor, assignment operator and dtor are ok
    virtual wxEvent *Clone() const { return new wxHtmlLinkEvent(*this); }

private:
    wxHtmlLinkInfo m_linkInfo;

    DECLARE_DYNAMIC_CLASS_NO_ASSIGN(wxHtmlLinkEvent)
};


typedef void (wxEvtHandler::*wxHtmlCellEventFunction)(wxHtmlCellEvent&);
typedef void (wxEvtHandler::*wxHtmlLinkEventFunction)(wxHtmlLinkEvent&);

#define wxHtmlCellEventHandler(func) \
    (wxObjectEventFunction)(wxEventFunction)wxStaticCastEvent(wxHtmlCellEventFunction, &func)
#define wxHtmlLinkEventHandler(func) \
    (wxObjectEventFunction)(wxEventFunction)wxStaticCastEvent(wxHtmlLinkEventFunction, &func)

#define EVT_HTML_CELL_CLICKED(id, fn) \
    wx__DECLARE_EVT1(wxEVT_COMMAND_HTML_CELL_CLICKED, id, wxHtmlCellEventHandler(fn))
#define EVT_HTML_CELL_HOVER(id, fn) \
    wx__DECLARE_EVT1(wxEVT_COMMAND_HTML_CELL_HOVER, id, wxHtmlCellEventHandler(fn))
#define EVT_HTML_LINK_CLICKED(id, fn) \
    wx__DECLARE_EVT1(wxEVT_COMMAND_HTML_LINK_CLICKED, id, wxHtmlLinkEventHandler(fn))


#endif // wxUSE_HTML

#endif // _WX_HTMLWIN_H_