include/wx/html/htmlcell.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        htmlcell.h
   3 // Purpose:     wxHtmlCell class is used by wxHtmlWindow/wxHtmlWinParser
   4 //              as a basic visual element of HTML page
   5 // Author:      Vaclav Slavik
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 1999 Vaclav Slavik
   8 // Licence:     wxWindows Licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11
  12 #ifndef _WX_HTMLCELL_H_
  13 #define _WX_HTMLCELL_H_
  14
  15 #ifdef __GNUG__
  16 #pragma interface
  17 #endif
  18
  19 #include "wx/defs.h"
  20
  21 #if wxUSE_HTML
  22
  23 #include "wx/html/htmltag.h"
  24 #include "wx/html/htmldefs.h"
  25 #include "wx/window.h"
  26
  27 class wxHtmlCell;
  28 class wxHtmlContainerCell;
  29
  30 //--------------------------------------------------------------------------------
  31 // wxHtmlCell
  32 //                  Internal data structure. It represents fragments of parsed HTML
  33 //                  page - a word, picture, table, horizontal line and so on.
  34 //                  It is used by wxHtmlWindow to represent HTML page in memory.
  35 //--------------------------------------------------------------------------------
  36
  37
  38 class WXDLLEXPORT wxHtmlCell : public wxObject
  39 {
  40     public:
  41         wxHtmlCell() : wxObject() {m_Next = NULL; m_Parent = NULL; m_Width = m_Height = m_Descent = 0; m_CanLiveOnPagebreak = TRUE;}
  42         virtual ~wxHtmlCell() {if (m_Next) delete m_Next;};
  43
  44         void SetParent(wxHtmlContainerCell *p) {m_Parent = p;}
  45         wxHtmlContainerCell *GetParent() const {return m_Parent;}
  46
  47         int GetPosX() const {return m_PosX;}
  48         int GetPosY() const {return m_PosY;}
  49         int GetWidth() const {return m_Width;}
  50         int GetHeight() const {return m_Height;}
  51         int GetDescent() const {return m_Descent;}
  52         virtual wxString GetLink(int WXUNUSED(x) = 0,
  53                                  int WXUNUSED(y) = 0) const
  54             { return m_Link; }
  55                 // returns the link associated with this cell. The position is position within
  56                 // the cell so it varies from 0 to m_Width, from 0 to m_Height
  57         wxHtmlCell *GetNext() const {return m_Next;}
  58                 // members access methods
  59
  60         virtual void SetPos(int x, int y) {m_PosX = x, m_PosY = y;}
  61         void SetLink(const wxString& link) {m_Link = link;}
  62         void SetNext(wxHtmlCell *cell) {m_Next = cell;}
  63                 // members writin methods
  64
  65         virtual void Layout(int w) {SetPos(0, 0); if (m_Next) m_Next -> Layout(w);};
  66                 // 1. adjust cell's width according to the fact that maximal possible width is w.
  67                 //    (this has sense when working with horizontal lines, tables etc.)
  68                 // 2. prepare layout (=fill-in m_PosX, m_PosY (and sometime m_Height) members)
  69                 //    = place items to fit window, according to the width w
  70
  71         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);}
  72                 // renders the cell
  73
  74         virtual void DrawInvisible(wxDC& dc, int x, int y) {if (m_Next) m_Next -> DrawInvisible(dc, x, y);};
  75                 // proceed drawing actions in case the cell is not visible (scrolled out of screen).
  76                 // This is needed to change fonts, colors and so on
  77
  78         virtual const wxHtmlCell* Find(int condition, const void* param) const {if (m_Next) return m_Next -> Find(condition, param); else return NULL;}
  79                 // This method returns pointer to the FIRST cell for that
  80                 // the condition
  81                 // is true. It first checks if the condition is true for this
  82                 // cell and then calls m_Next -> Find(). (Note: it checks
  83                 // all subcells if the cell is container)
  84                 // Condition is unique condition identifier (see htmldefs.h)
  85                 // (user-defined condition IDs should start from 10000)
  86                 // and param is optional parameter
  87                 // Example : m_Cell -> Find(wxHTML_COND_ISANCHOR, "news");
  88                 //   returns pointer to anchor news
  89
  90         virtual void OnMouseClick(wxWindow *parent, int x, int y, bool left, bool middle, bool right);
  91                 // This function is called when mouse button is clicked over the cell.
  92                 // left, middle, right are flags indicating whether the button was or wasn't
  93                 // pressed.
  94                 // Parent is pointer to wxHtmlWindow that generated the event
  95                 // HINT: if this handling is not enough for you you should use
  96                 //       wxHtmlBinderCell
  97
  98         virtual bool AdjustPagebreak(int *pagebreak);
  99                 // This method used to adjust pagebreak position. The parameter is
 100                 // variable that contains y-coordinate of page break (= horizontal line that
 101                 // should not be crossed by words, images etc.). If this cell cannot be divided
 102                 // into two pieces (each one on another page) then it moves the pagebreak
 103                 // few pixels up.
 104                 //
 105                 // Returned value : true if pagebreak was modified, false otherwise
 106                 // Usage : while (container->AdjustPagebreak(&p)) {}
 107
 108         void SetCanLiveOnPagebreak(bool can) {m_CanLiveOnPagebreak = can;}
 109                 // Sets cell's behaviour on pagebreaks (see AdjustPagebreak). Default
 110                 // is true - the cell can be split on two pages
 111
 112
 113     protected:
 114         wxHtmlCell *m_Next;
 115                 // pointer to the next cell
 116         wxHtmlContainerCell *m_Parent;
 117             // pointer to parent cell
 118         long m_Width, m_Height, m_Descent;
 119                 // dimensions of fragment
 120                 // m_Descent is used to position text&images..
 121         long m_PosX, m_PosY;
 122                 // position where the fragment is drawn
 123         wxString m_Link;
 124                 // destination address if this fragment is hypertext link, "" otherwise
 125         bool m_CanLiveOnPagebreak;
 126                 // true if this cell can be placed on pagebreak, false otherwise
 127
 128 };
 129
 130
 131
 132
 133 //--------------------------------------------------------------------------------
 134 // Inherited cells:
 135 //--------------------------------------------------------------------------------
 136
 137
 138 //--------------------------------------------------------------------------------
 139 // wxHtmlWordCell
 140 //                  Single word in input stream.
 141 //--------------------------------------------------------------------------------
 142
 143 class WXDLLEXPORT wxHtmlWordCell : public wxHtmlCell
 144 {
 145     protected:
 146         wxString m_Word;
 147
 148     public:
 149         wxHtmlWordCell(const wxString& word, wxDC& dc);
 150         void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2);
 151 };
 152
 153
 154
 155
 156
 157 //--------------------------------------------------------------------------------
 158 // wxHtmlContainerCell
 159 //                  Container - it contains other cells. Basic of layout algorithm.
 160 //--------------------------------------------------------------------------------
 161
 162 class WXDLLEXPORT wxHtmlContainerCell : public wxHtmlCell
 163 {
 164     protected:
 165         int m_IndentLeft, m_IndentRight, m_IndentTop, m_IndentBottom;
 166                 // indentation of subcells. There is always m_Indent pixels
 167                 // big space between given border of the container and the subcells
 168                 // it m_Indent < 0 it is in PERCENTS, otherwise it is in pixels
 169         int m_MinHeight, m_MinHeightAlign;
 170             // minimal height.
 171         int m_MaxLineWidth;
 172             // maximal widht of line. Filled during Layout()
 173         wxHtmlCell *m_Cells, *m_LastCell;
 174                 // internal cells, m_Cells points to the first of them, m_LastCell to the last one.
 175                 // (LastCell is needed only to speed-up InsertCell)
 176         int m_AlignHor, m_AlignVer;
 177                 // alignment horizontal and vertical (left, center, right)
 178         int m_WidthFloat, m_WidthFloatUnits;
 179                 // width float is used in adjustWidth
 180         bool m_UseBkColour;
 181         wxColour m_BkColour;
 182                 // background color of this container
 183         bool m_UseBorder;
 184         wxColour m_BorderColour1, m_BorderColour2;
 185                 // borders color of this container
 186
 187     public:
 188         wxHtmlContainerCell(wxHtmlContainerCell *parent);
 189         ~wxHtmlContainerCell() {if (m_Cells) delete m_Cells;}
 190
 191         virtual void Layout(int w);
 192         virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2);
 193         virtual void DrawInvisible(wxDC& dc, int x, int y);
 194         virtual bool AdjustPagebreak(int *pagebreak);
 195
 196         void InsertCell(wxHtmlCell *cell);
 197                 // insert cell at the end of m_Cells list
 198         void SetAlignHor(int al) {m_AlignHor = al;}
 199         int GetAlignHor() const {return m_AlignHor;}
 200         void SetAlignVer(int al) {m_AlignVer = al;}
 201                 // sets horizontal/vertical alignment
 202         int GetAlignVer() const {return m_AlignVer;}
 203         void SetIndent(int i, int what, int units = wxHTML_UNITS_PIXELS);
 204                 // sets left-border indentation. units is one of wxHTML_UNITS_* constants
 205                 // what is combination of wxHTML_INDENT_*
 206         int GetIndent(int ind) const;
 207                 // returns the indentation. ind is one of wxHTML_INDENT_* constants
 208         int GetIndentUnits(int ind) const;
 209                 // returns type of value returned by GetIndent(ind)
 210         void SetAlign(const wxHtmlTag& tag);
 211                 // sets alignment info based on given tag's params
 212         void SetWidthFloat(int w, int units) {m_WidthFloat = w; m_WidthFloatUnits = units;}
 213         void SetWidthFloat(const wxHtmlTag& tag, double pixel_scale = 1.0);
 214                 // sets floating width adjustment
 215                 // (examples : 32 percent of parent container,
 216                 // -15 pixels percent (this means 100 % - 15 pixels)
 217         void SetMinHeight(int h, int align = wxHTML_ALIGN_TOP) {m_MinHeight = h; m_MinHeightAlign = align;}
 218                 // sets minimal height of this container.
 219         int GetMaxLineWidth() const {return m_MaxLineWidth;}
 220             // returns maximal line width in this container.
 221             // Call to this method is valid only after calling
 222             // Layout()
 223         void SetBackgroundColour(const wxColour& clr) {m_UseBkColour = TRUE; m_BkColour = clr;}
 224         void SetBorder(const wxColour& clr1, const wxColour& clr2) {m_UseBorder = TRUE; m_BorderColour1 = clr1, m_BorderColour2 = clr2;}
 225         virtual wxString GetLink(int x = 0, int y = 0) const;
 226         virtual const wxHtmlCell* Find(int condition, const void* param) const;
 227         virtual void OnMouseClick(wxWindow *parent, int x, int y, bool left, bool middle, bool right);
 228
 229         wxHtmlCell* GetFirstCell() {return m_Cells;}
 230                 // returns pointer to the first cell in container or NULL
 231 };
 232
 233
 234
 235
 236
 237 //--------------------------------------------------------------------------------
 238 // wxHtmlColourCell
 239 //                  Color changer.
 240 //--------------------------------------------------------------------------------
 241
 242 class WXDLLEXPORT wxHtmlColourCell : public wxHtmlCell
 243 {
 244     public:
 245         wxColour m_Colour;
 246         unsigned m_Flags;
 247
 248         wxHtmlColourCell(wxColour clr, int flags = wxHTML_CLR_FOREGROUND) : wxHtmlCell() {m_Colour = clr; m_Flags = flags;}
 249         virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2);
 250         virtual void DrawInvisible(wxDC& dc, int x, int y);
 251 };
 252
 253
 254
 255
 256 //--------------------------------------------------------------------------------
 257 // wxHtmlFontCell
 258 //                  Sets actual font used for text rendering
 259 //--------------------------------------------------------------------------------
 260
 261 class WXDLLEXPORT wxHtmlFontCell : public wxHtmlCell
 262 {
 263     public:
 264         wxFont m_Font;
 265
 266         wxHtmlFontCell(wxFont *font) : wxHtmlCell() { m_Font = (*font); }
 267         virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2);
 268         virtual void DrawInvisible(wxDC& dc, int x, int y);
 269 };
 270
 271
 272
 273
 274
 275
 276 //--------------------------------------------------------------------------------
 277 // wxHtmlwidgetCell
 278 //                  This cell is connected with wxWindow object
 279 //                  You can use it to insert windows into HTML page
 280 //                  (buttons, input boxes etc.)
 281 //--------------------------------------------------------------------------------
 282
 283 class WXDLLEXPORT wxHtmlWidgetCell : public wxHtmlCell
 284 {
 285     protected:
 286         wxWindow* m_Wnd;
 287         int m_WidthFloat;
 288                 // width float is used in adjustWidth (it is in percents)
 289
 290     public:
 291         wxHtmlWidgetCell(wxWindow *wnd, int w = 0);
 292                 // !!! wnd must have correct parent!
 293                 // if w != 0 then the m_Wnd has 'floating' width - it adjust
 294                 // it's width according to parent container's width
 295                 // (w is percent of parent's width)
 296         ~wxHtmlWidgetCell() {if (m_Wnd) m_Wnd -> Destroy(); }
 297         virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2);
 298         virtual void DrawInvisible(wxDC& dc, int x, int y);
 299         virtual void Layout(int w);
 300 };
 301
 302
 303
 304 #endif
 305
 306 #endif // _WX_HTMLCELL_H_
 307