///////////////////////////////////////////////////////////////////////////// // Name: htmlcell.h // Purpose: wxHtmlCell class is used by wxHtmlWindow/wxHtmlWinParser // as a basic visual element of HTML page // Author: Vaclav Slavik // RCS-ID: $Id$ // Copyright: (c) 1999 Vaclav Slavik // Licence: wxWindows Licence ///////////////////////////////////////////////////////////////////////////// #ifndef _WX_HTMLCELL_H_ #define _WX_HTMLCELL_H_ #ifdef __GNUG__ #pragma interface #endif #include "wx/defs.h" #if wxUSE_HTML #include "wx/html/htmltag.h" #include "wx/html/htmldefs.h" #include "wx/window.h" class wxHtmlCell; class wxHtmlContainerCell; //-------------------------------------------------------------------------------- // wxHtmlCell // Internal data structure. It represents fragments of parsed HTML // page - a word, picture, table, horizontal line and so on. // It is used by wxHtmlWindow to represent HTML page in memory. //-------------------------------------------------------------------------------- class WXDLLEXPORT wxHtmlCell : public wxObject { public: wxHtmlCell() : wxObject() {m_Next = NULL; m_Parent = NULL; m_Width = m_Height = m_Descent = 0; m_CanLiveOnPagebreak = TRUE;} virtual ~wxHtmlCell() {if (m_Next) delete m_Next;}; void SetParent(wxHtmlContainerCell *p) {m_Parent = p;} wxHtmlContainerCell *GetParent() const {return m_Parent;} int GetPosX() const {return m_PosX;} int GetPosY() const {return m_PosY;} int GetWidth() const {return m_Width;} int GetHeight() const {return m_Height;} int GetDescent() const {return m_Descent;} virtual wxString GetLink(int WXUNUSED(x) = 0, int WXUNUSED(y) = 0) const { return m_Link; } // returns the link associated with this cell. The position is position within // the cell so it varies from 0 to m_Width, from 0 to m_Height wxHtmlCell *GetNext() const {return m_Next;} // members access methods virtual void SetPos(int x, int y) {m_PosX = x, m_PosY = y;} void SetLink(const wxString& link) {m_Link = link;} void SetNext(wxHtmlCell *cell) {m_Next = cell;} // members writin methods virtual void Layout(int w) {SetPos(0, 0); if (m_Next) m_Next -> Layout(w);}; // 1. adjust cell's width according to the fact that maximal possible width is w. // (this has sense when working with horizontal lines, tables etc.) // 2. prepare layout (=fill-in m_PosX, m_PosY (and sometime m_Height) members) // = place items to fit window, according to the width w virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2) {if (m_Next) m_Next -> Draw(dc, x, y, view_y1, view_y2);} // renders the cell virtual void DrawInvisible(wxDC& dc, int x, int y) {if (m_Next) m_Next -> DrawInvisible(dc, x, y);}; // proceed drawing actions in case the cell is not visible (scrolled out of screen). // This is needed to change fonts, colors and so on virtual const wxHtmlCell* Find(int condition, const void* param) const {if (m_Next) return m_Next -> Find(condition, param); else return NULL;} // This method returns pointer to the FIRST cell for that // the condition // is true. It first checks if the condition is true for this // cell and then calls m_Next -> Find(). (Note: it checks // all subcells if the cell is container) // Condition is unique condition identifier (see htmldefs.h) // (user-defined condition IDs should start from 10000) // and param is optional parameter // Example : m_Cell -> Find(wxHTML_COND_ISANCHOR, "news"); // returns pointer to anchor news virtual void OnMouseClick(wxWindow *parent, int x, int y, bool left, bool middle, bool right); // This function is called when mouse button is clicked over the cell. // left, middle, right are flags indicating whether the button was or wasn't // pressed. // Parent is pointer to wxHtmlWindow that generated the event // HINT: if this handling is not enough for you you should use // wxHtmlBinderCell virtual bool AdjustPagebreak(int *pagebreak); // This method used to adjust pagebreak position. The parameter is // variable that contains y-coordinate of page break (= horizontal line that // should not be crossed by words, images etc.). If this cell cannot be divided // into two pieces (each one on another page) then it moves the pagebreak // few pixels up. // // Returned value : true if pagebreak was modified, false otherwise // Usage : while (container->AdjustPagebreak(&p)) {} void SetCanLiveOnPagebreak(bool can) {m_CanLiveOnPagebreak = can;} // Sets cell's behaviour on pagebreaks (see AdjustPagebreak). Default // is true - the cell can be split on two pages protected: wxHtmlCell *m_Next; // pointer to the next cell wxHtmlContainerCell *m_Parent; // pointer to parent cell long m_Width, m_Height, m_Descent; // dimensions of fragment // m_Descent is used to position text&images.. long m_PosX, m_PosY; // position where the fragment is drawn wxString m_Link; // destination address if this fragment is hypertext link, "" otherwise bool m_CanLiveOnPagebreak; // true if this cell can be placed on pagebreak, false otherwise }; //-------------------------------------------------------------------------------- // Inherited cells: //-------------------------------------------------------------------------------- //-------------------------------------------------------------------------------- // wxHtmlWordCell // Single word in input stream. //-------------------------------------------------------------------------------- class WXDLLEXPORT wxHtmlWordCell : public wxHtmlCell { protected: wxString m_Word; public: wxHtmlWordCell(const wxString& word, wxDC& dc); void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2); }; //-------------------------------------------------------------------------------- // wxHtmlContainerCell // Container - it contains other cells. Basic of layout algorithm. //-------------------------------------------------------------------------------- class WXDLLEXPORT wxHtmlContainerCell : public wxHtmlCell { protected: int m_IndentLeft, m_IndentRight, m_IndentTop, m_IndentBottom; // indentation of subcells. There is always m_Indent pixels // big space between given border of the container and the subcells // it m_Indent < 0 it is in PERCENTS, otherwise it is in pixels int m_MinHeight, m_MinHeightAlign; // minimal height. int m_MaxLineWidth; // maximal widht of line. Filled during Layout() wxHtmlCell *m_Cells, *m_LastCell; // internal cells, m_Cells points to the first of them, m_LastCell to the last one. // (LastCell is needed only to speed-up InsertCell) int m_AlignHor, m_AlignVer; // alignment horizontal and vertical (left, center, right) int m_WidthFloat, m_WidthFloatUnits; // width float is used in adjustWidth bool m_UseBkColour; wxColour m_BkColour; // background color of this container bool m_UseBorder; wxColour m_BorderColour1, m_BorderColour2; // borders color of this container public: wxHtmlContainerCell(wxHtmlContainerCell *parent); ~wxHtmlContainerCell() {if (m_Cells) delete m_Cells;} virtual void Layout(int w); virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2); virtual void DrawInvisible(wxDC& dc, int x, int y); virtual bool AdjustPagebreak(int *pagebreak); void InsertCell(wxHtmlCell *cell); // insert cell at the end of m_Cells list void SetAlignHor(int al) {m_AlignHor = al;} int GetAlignHor() const {return m_AlignHor;} void SetAlignVer(int al) {m_AlignVer = al;} // sets horizontal/vertical alignment int GetAlignVer() const {return m_AlignVer;} void SetIndent(int i, int what, int units = wxHTML_UNITS_PIXELS); // sets left-border indentation. units is one of wxHTML_UNITS_* constants // what is combination of wxHTML_INDENT_* int GetIndent(int ind) const; // returns the indentation. ind is one of wxHTML_INDENT_* constants int GetIndentUnits(int ind) const; // returns type of value returned by GetIndent(ind) void SetAlign(const wxHtmlTag& tag); // sets alignment info based on given tag's params void SetWidthFloat(int w, int units) {m_WidthFloat = w; m_WidthFloatUnits = units;} void SetWidthFloat(const wxHtmlTag& tag, double pixel_scale = 1.0); // sets floating width adjustment // (examples : 32 percent of parent container, // -15 pixels percent (this means 100 % - 15 pixels) void SetMinHeight(int h, int align = wxHTML_ALIGN_TOP) {m_MinHeight = h; m_MinHeightAlign = align;} // sets minimal height of this container. int GetMaxLineWidth() const {return m_MaxLineWidth;} // returns maximal line width in this container. // Call to this method is valid only after calling // Layout() void SetBackgroundColour(const wxColour& clr) {m_UseBkColour = TRUE; m_BkColour = clr;} void SetBorder(const wxColour& clr1, const wxColour& clr2) {m_UseBorder = TRUE; m_BorderColour1 = clr1, m_BorderColour2 = clr2;} virtual wxString GetLink(int x = 0, int y = 0) const; virtual const wxHtmlCell* Find(int condition, const void* param) const; virtual void OnMouseClick(wxWindow *parent, int x, int y, bool left, bool middle, bool right); wxHtmlCell* GetFirstCell() {return m_Cells;} // returns pointer to the first cell in container or NULL }; //-------------------------------------------------------------------------------- // wxHtmlColourCell // Color changer. //-------------------------------------------------------------------------------- class WXDLLEXPORT wxHtmlColourCell : public wxHtmlCell { public: wxColour m_Colour; unsigned m_Flags; wxHtmlColourCell(wxColour clr, int flags = wxHTML_CLR_FOREGROUND) : wxHtmlCell() {m_Colour = clr; m_Flags = flags;} virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2); virtual void DrawInvisible(wxDC& dc, int x, int y); }; //-------------------------------------------------------------------------------- // wxHtmlFontCell // Sets actual font used for text rendering //-------------------------------------------------------------------------------- class WXDLLEXPORT wxHtmlFontCell : public wxHtmlCell { public: wxFont m_Font; wxHtmlFontCell(wxFont *font) : wxHtmlCell() { m_Font = (*font); } virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2); virtual void DrawInvisible(wxDC& dc, int x, int y); }; //-------------------------------------------------------------------------------- // wxHtmlwidgetCell // This cell is connected with wxWindow object // You can use it to insert windows into HTML page // (buttons, input boxes etc.) //-------------------------------------------------------------------------------- class WXDLLEXPORT wxHtmlWidgetCell : public wxHtmlCell { protected: wxWindow* m_Wnd; int m_WidthFloat; // width float is used in adjustWidth (it is in percents) public: wxHtmlWidgetCell(wxWindow *wnd, int w = 0); // !!! wnd must have correct parent! // if w != 0 then the m_Wnd has 'floating' width - it adjust // it's width according to parent container's width // (w is percent of parent's width) ~wxHtmlWidgetCell() {if (m_Wnd) m_Wnd -> Destroy(); } virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2); virtual void DrawInvisible(wxDC& dc, int x, int y); virtual void Layout(int w); }; #endif #endif // _WX_HTMLCELL_H_