src/frontends/WorkArea.C

   1 /**
   2  * \file WorkArea.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author John Levon
   7  * \author Abdelrazak Younes
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  *
  11  * Splash screen code added by Angus Leeming
  12  */
  13
  14 #include <config.h>
  15
  16 #include "WorkArea.h"
  17
  18 #include "font_metrics.h"
  19 #include "lyx_gui.h"
  20 #include "Painter.h"
  21
  22 #include "BufferView.h"
  23 #include "buffer.h"
  24 #include "bufferparams.h"
  25 #include "coordcache.h"
  26 #include "cursor.h"
  27 #include "debug.h"
  28 #include "language.h"
  29 #include "LColor.h"
  30 #include "lyxfont.h"
  31 #include "lyxrc.h"
  32 #include "lyxrow.h"
  33 #include "lyxtext.h"
  34 #include "metricsinfo.h"
  35 #include "paragraph.h"
  36 #include "rowpainter.h"
  37 #include "version.h"
  38
  39 #include "graphics/GraphicsImage.h"
  40 #include "graphics/GraphicsLoader.h"
  41
  42 #include "support/filetools.h" // LibFileSearch
  43
  44 #include <boost/utility.hpp>
  45 #include <boost/bind.hpp>
  46 #include <boost/signals/trackable.hpp>
  47
  48 using lyx::support::libFileSearch;
  49
  50 using std::endl;
  51 using std::min;
  52 using std::max;
  53 using std::string;
  54
  55
  56 namespace lyx {
  57 namespace frontend {
  58
  59 class SplashScreen : boost::noncopyable, boost::signals::trackable {
  60 public:
  61         /// This is a singleton class. Get the instance.
  62         static SplashScreen const & get();
  63         ///
  64         lyx::graphics::Image const * image() const { return loader_.image(); }
  65         ///
  66         string const & text() const { return text_; }
  67         ///
  68         LyXFont const & font() const { return font_; }
  69         ///
  70         void connect(lyx::graphics::Loader::slot_type const & slot) const {
  71                 loader_.connect(slot);
  72         }
  73         ///
  74         void startLoading() const {
  75                 if (loader_.status() == lyx::graphics::WaitingToLoad)
  76                         loader_.startLoading();
  77         }
  78
  79 private:
  80         /** Make the c-tor private so we can control how many objects
  81          *  are instantiated.
  82          */
  83         SplashScreen();
  84
  85         ///
  86         lyx::graphics::Loader loader_;
  87         /// The text to be written on top of the pixmap
  88         string const text_;
  89         /// in this font...
  90         LyXFont font_;
  91 };
  92
  93
  94 SplashScreen const & SplashScreen::get()
  95 {
  96         static SplashScreen singleton;
  97         return singleton;
  98 }
  99
 100
 101 SplashScreen::SplashScreen()
 102         : text_(lyx_version ? lyx_version : "unknown")
 103 {
 104         if (!lyxrc.show_banner)
 105                 return;
 106
 107         string const file = libFileSearch("images", "banner", "ppm");
 108         if (file.empty())
 109                 return;
 110
 111         // The font used to display the version info
 112         font_.setFamily(LyXFont::SANS_FAMILY);
 113         font_.setSeries(LyXFont::BOLD_SERIES);
 114         font_.setSize(LyXFont::SIZE_NORMAL);
 115         font_.setColor(LColor::yellow);
 116
 117         // Load up the graphics file
 118         loader_.reset(file);
 119 }
 120
 121 WorkArea::WorkArea(BufferView * buffer_view)
 122         :  buffer_view_(buffer_view), greyed_out_(true)
 123 {
 124         // Start loading the pixmap as soon as possible
 125         if (lyxrc.show_banner) {
 126                 SplashScreen const & splash = SplashScreen::get();
 127                 splash.connect(boost::bind(&WorkArea::checkAndGreyOut, this));
 128                 splash.startLoading();
 129         }
 130 }
 131
 132
 133 void WorkArea::setBufferView(BufferView * buffer_view)
 134 {
 135         buffer_view_ = buffer_view;
 136 }
 137
 138
 139 BufferView & WorkArea::bufferView()
 140 {
 141         return *buffer_view_;
 142 }
 143
 144
 145 BufferView const & WorkArea::bufferView() const
 146 {
 147         return *buffer_view_;
 148 }
 149
 150
 151 void WorkArea::checkAndGreyOut()
 152 {
 153         if (greyed_out_)
 154                 greyOut();
 155 }
 156
 157
 158 void WorkArea::redraw()
 159 {
 160         BOOST_ASSERT(buffer_view_);
 161
 162         if (!buffer_view_->buffer()) {
 163                 greyOut();
 164                 return;
 165         }
 166
 167         if (!buffer_view_->needsRedraw())
 168                 return;
 169
 170         greyed_out_ = false;
 171         ViewMetricsInfo const & vi = buffer_view_->viewMetricsInfo();
 172         getPainter().start();
 173         paintText(*buffer_view_, vi);
 174         lyxerr[Debug::DEBUG] << "Redraw screen" << endl;
 175         int const ymin = std::max(vi.y1, 0);
 176         int const ymax =
 177                 ( vi.p2 < vi.size - 1 ?  vi.y2 : height() );
 178         expose(0, ymin, width(), ymax - ymin);
 179         getPainter().end();
 180         //theCoords.doneUpdating();
 181         buffer_view_->needsRedraw(false);
 182
 183         if (lyxerr.debugging(Debug::DEBUG)) {
 184                 lyxerr[Debug::DEBUG]
 185                         << "  ymin = " << ymin << "  width() = " << width()
 186                         << "  ymax-ymin = " << ymax-ymin << std::endl;
 187         }
 188 }
 189
 190
 191 void WorkArea::greyOut()
 192 {
 193         greyed_out_ = true;
 194         getPainter().start();
 195
 196         getPainter().fillRectangle(0, 0,
 197                 width(),
 198                 height(),
 199                 LColor::bottomarea);
 200
 201         // Add a splash screen to the centre of the work area
 202         SplashScreen const & splash = SplashScreen::get();
 203         lyx::graphics::Image const * const splash_image = splash.image();
 204         if (splash_image) {
 205                 int const w = splash_image->getWidth();
 206                 int const h = splash_image->getHeight();
 207
 208                 int x = (width() - w) / 2;
 209                 int y = (height() - h) / 2;
 210
 211                 getPainter().image(x, y, w, h, *splash_image);
 212
 213                 x += 260;
 214                 y += 265;
 215
 216                 getPainter().text(x, y, splash.text(), splash.font());
 217         }
 218         expose(0, 0, width(), height());
 219         getPainter().end();
 220 }
 221
 222 } // namespace frontend
 223 } // namespace lyx