include/wx/html/htmprint.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        htmprint.h
   3 // Purpose:     html printing classes
   4 // Author:      Vaclav Slavik
   5 // Created:     25/09/99
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c)
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 #ifndef _WX_HTMPRINT_H_
  12 #define _WX_HTMPRINT_H_
  13
  14 #ifdef __GNUG__
  15 #pragma interface
  16 #endif
  17
  18 #include <wx/defs.h>
  19
  20 #if wxUSE_PRINTING_ARCHITECTURE
  21
  22 #include "wx/html/htmlcell.h"
  23 #include "wx/html/winpars.h"
  24
  25 #include "wx/print.h"
  26 #include "wx/printdlg.h"
  27
  28
  29 //--------------------------------------------------------------------------------
  30 // wxHtmlDCRenderer
  31 //                  This class is capable of rendering HTML into specified
  32 //                  portion of DC
  33 //--------------------------------------------------------------------------------
  34
  35
  36 class wxHtmlDCRenderer : public wxObject
  37 {
  38     public:
  39         wxHtmlDCRenderer();
  40         ~wxHtmlDCRenderer();
  41
  42         // Following 3 methods *must* be called before any call to Render:
  43         void SetDC(wxDC *dc, int maxwidth);
  44                 // asign DC to this render
  45                 // maxwidth is width of area (on this DC) that is equivalent to screen's width, in pixels
  46                 // (you should set it to page width minus margins)
  47                 // Also see SetSize
  48         void SetSize(int width, int height);
  49                 // sets size of output rectangle, in pixels. Note that you *can't* change
  50                 // width of the rectangle between calls to Render! (You can freely change height.)
  51                 // If you set width = maxwidth then HTML is rendered as if it were displayed in fullscreen.
  52                 // If you set width = 1/2 maxwidth the it is rendered as if it covered half the screen
  53                 // and so on..
  54         void SetHtmlText(const wxString& html, const wxString& basepath = wxEmptyString, bool isdir = TRUE);
  55                 // sets the text to be displayed
  56                 //
  57                 // basepath is base directory (html string would be stored there if it was in
  58                 // file). It is used to determine path for loading images, for example.
  59                 // isdir is FALSE if basepath is filename, TRUE if it is directory name
  60                 // (see wxFileSystem for detailed explanation)
  61
  62         int Render(int x, int y, int from = 0, int dont_render = FALSE);
  63                 // [x,y] is position of upper-left corner of printing rectangle (see SetSize)
  64                 // from is y-coordinate of the very first visible cell
  65                 // Returned value is y coordinate of first cell than didn't fit onto page.
  66                 // Use this value as 'from' in next call to Render in order to print multiple pages
  67                 // document
  68                 // If dont_render is TRUE then nothing is rendered into DC and it only counts
  69                 // pixels and return y coord of the next page
  70                 //
  71                 // CAUTION! Render() changes DC's user scale and does NOT restore it!
  72
  73         int GetTotalHeight();
  74                 // returns total height of the html document
  75                 // (compare Render's return value with this)
  76
  77     private:
  78
  79         wxDC *m_DC;
  80         wxHtmlWinParser *m_Parser;
  81         wxFileSystem *m_FS;
  82         wxHtmlContainerCell *m_Cells;
  83         int m_MaxWidth, m_Width, m_Height;
  84         double m_Scale;
  85 };
  86
  87
  88
  89
  90
  91 enum {
  92     wxPAGE_ODD,
  93     wxPAGE_EVEN,
  94     wxPAGE_ALL
  95 };
  96
  97
  98
  99 //--------------------------------------------------------------------------------
 100 // wxHtmlPrintout
 101 //                  This class is derived from standard wxWindows printout class
 102 //                  and is used to print HTML documents.
 103 //--------------------------------------------------------------------------------
 104
 105
 106 class wxHtmlPrintout : public wxPrintout
 107 {
 108     public:
 109         wxHtmlPrintout(const wxString& title = "Printout");
 110         ~wxHtmlPrintout();
 111
 112         void SetHtmlText(const wxString& html, const wxString &basepath = wxEmptyString, bool isdir = TRUE);
 113                 // prepares the class for printing this html document.
 114                 // Must be called before using the class, in fact just after constructor
 115                 //
 116                 // basepath is base directory (html string would be stored there if it was in
 117                 // file). It is used to determine path for loading images, for example.
 118                 // isdir is FALSE if basepath is filename, TRUE if it is directory name
 119                 // (see wxFileSystem for detailed explanation)
 120
 121         void SetHtmlFile(const wxString &htmlfile);
 122                 // same as SetHtmlText except that it takes regular file as the parameter
 123
 124         void SetHeader(const wxString& header, int pg = wxPAGE_ALL);
 125         void SetFooter(const wxString& footer, int pg = wxPAGE_ALL);
 126                 // sets header/footer for the document. The argument is interpreted as HTML document.
 127                 // You can use macros in it:
 128                 //   @PAGENUM@ is replaced by page number
 129                 //   @PAGESCNT@ is replaced by total number of pages
 130                 //
 131                 // pg is one of wxPAGE_ODD, wxPAGE_EVEN and wx_PAGE_ALL constants.
 132                 // You can set different header/footer for odd and even pages
 133
 134         void SetMargins(float top = 25.2, float bottom = 25.2, float left = 25.2, float right = 25.2,
 135                         float spaces = 5);
 136                 // sets margins in milimeters. Defaults to 1 inch for margins and 0.5cm for space
 137                 // between text and header and/or footer
 138
 139         // wxPrintout stuff:
 140         bool OnPrintPage(int page);
 141         bool HasPage(int page);
 142         void GetPageInfo(int *minPage, int *maxPage, int *selPageFrom, int *selPageTo);
 143         void OnBeginPrinting();
 144
 145     private:
 146
 147         void RenderPage(wxDC *dc, int page);
 148                 // renders one page into dc
 149         wxString TranslateHeader(const wxString& instr, int page);
 150                 // substitute @PAGENUM@ and @PAGESCNT@ by real values
 151         void CountPages();
 152                 // counts pages and fills m_NumPages and m_PageBreaks
 153
 154
 155     private:
 156         int m_NumPages;
 157         int m_PageBreaks[wxHTML_PRINT_MAX_PAGES];
 158
 159         wxString m_Document, m_BasePath;
 160         bool m_BasePathIsDir;
 161         wxString m_Headers[2], m_Footers[2];
 162
 163         int m_HeaderHeight, m_FooterHeight;
 164         wxHtmlDCRenderer *m_Renderer, *m_RendererHdr;
 165         float m_MarginTop, m_MarginBottom, m_MarginLeft, m_MarginRight, m_MarginSpace;
 166 };
 167
 168
 169
 170
 171
 172 //--------------------------------------------------------------------------------
 173 // wxHtmlEasyPrinting
 174 //                  This class provides very simple interface to printing
 175 //                  architecture. It allows you to print HTML documents only
 176 //                  with very few commands.
 177 //
 178 //                  Note : do not create this class on stack only.
 179 //                         You should create an instance on app startup and
 180 //                         use this instance for all printing. Why? The class
 181 //                         stores page&printer settings in it.
 182 //--------------------------------------------------------------------------------
 183
 184 class wxHtmlEasyPrinting : public wxObject
 185 {
 186     public:
 187
 188         wxHtmlEasyPrinting(const wxString& name = "Printing", wxFrame *parent_frame = NULL);
 189         ~wxHtmlEasyPrinting();
 190
 191         void PreviewFile(const wxString &htmlfile);
 192         void PreviewText(const wxString &htmltext, const wxString& basepath = wxEmptyString);
 193                 // Preview file / html-text for printing
 194                 // (and offers printing)
 195                 // basepath is base directory for opening subsequent files (e.g. from <img> tag)
 196
 197         void PrintFile(const wxString &htmlfile);
 198         void PrintText(const wxString &htmltext, const wxString& basepath = wxEmptyString);
 199                 // Print file / html-text w/o preview
 200
 201         void PrinterSetup();
 202         void PageSetup();
 203                 // pop up printer or page setup dialog
 204
 205         void SetHeader(const wxString& header, int pg = wxPAGE_ALL);
 206         void SetFooter(const wxString& footer, int pg = wxPAGE_ALL);
 207                 // sets header/footer for the document. The argument is interpreted as HTML document.
 208                 // You can use macros in it:
 209                 //   @PAGENUM@ is replaced by page number
 210                 //   @PAGESCNT@ is replaced by total number of pages
 211                 //
 212                 // pg is one of wxPAGE_ODD, wxPAGE_EVEN and wx_PAGE_ALL constants.
 213                 // You can set different header/footer for odd and even pages
 214
 215         wxPrintData *GetPrintData() {return m_PrintData;}
 216         wxPageSetupDialogData *GetPageSetupData() {return m_PageSetupData;}
 217                 // return page setting data objects.
 218                 // (You can set their parameters.)
 219
 220     private:
 221
 222         wxHtmlPrintout *CreatePrintout();
 223         void DoPreview(wxHtmlPrintout *printout1, wxHtmlPrintout *printout2);
 224         void DoPrint(wxHtmlPrintout *printout);
 225
 226         wxPrintData *m_PrintData;
 227         wxPageSetupDialogData *m_PageSetupData;
 228         wxString m_Name;
 229         wxString m_Headers[2], m_Footers[2];
 230         wxFrame *m_Frame;
 231 };
 232
 233
 234
 235
 236 #endif  // wxUSE_PRINTING_ARCHITECTURE
 237
 238 #endif // _WX_HTMPRINT_H_
 239