lib/gui/epixmap.cpp

   1 #include <lib/gui/epixmap.h>
   2 #include <lib/gdi/epng.h>
   3 #include <lib/gui/ewidgetdesktop.h>
   4
   5 ePixmap::ePixmap(eWidget *parent)
   6         :eWidget(parent), m_alphatest(false)
   7 {
   8 }
   9
  10 void ePixmap::setAlphatest(int alphatest)
  11 {
  12         m_alphatest = alphatest;
  13         setTransparent(alphatest);
  14 }
  15
  16 void ePixmap::setPixmap(gPixmap *pixmap)
  17 {
  18         m_pixmap = pixmap;
  19         event(evtChangedPixmap);
  20 }
  21
  22 void ePixmap::setPixmap(ePtr<gPixmap> &pixmap)
  23 {
  24         m_pixmap = pixmap;
  25         event(evtChangedPixmap);
  26 }
  27
  28 void ePixmap::setPixmapFromFile(const char *filename)
  29 {
  30         loadPNG(m_pixmap, filename);
  31
  32         if (!m_pixmap)
  33         {
  34                 eDebug("ePixmap::setPixmapFromFile: loadPNG failed");
  35                 return;
  36         }
  37
  38                 // TODO: This only works for desktop 0
  39         getDesktop(0)->makeCompatiblePixmap(*m_pixmap);
  40         event(evtChangedPixmap);
  41 }
  42
  43 void ePixmap::checkSize()
  44 {
  45                         /* when we have no pixmap, or a pixmap of different size, we need
  46            to enable transparency in any case. */
  47         if (m_pixmap && m_pixmap->size() == size() && !m_alphatest)
  48                 setTransparent(0);
  49         else
  50                 setTransparent(1);
  51                 /* fall trough. */
  52 }
  53
  54 int ePixmap::event(int event, void *data, void *data2)
  55 {
  56         switch (event)
  57         {
  58         case evtPaint:
  59         {
  60                 ePtr<eWindowStyle> style;
  61
  62                 getStyle(style);
  63
  64 //      we don't clear the background before because of performance reasons.
  65 //      when the pixmap is too small to fit the whole widget area, the widget is
  66 //      transparent anyway, so the background is already painted.
  67 //              eWidget::event(event, data, data2);
  68
  69                 gPainter &painter = *(gPainter*)data2;
  70                 if (m_pixmap)
  71                 {
  72                         int flags = 0;
  73                         if (m_alphatest == 0)
  74                                 flags = 0;
  75                         else if (m_alphatest == 1)
  76                                 flags = gPainter::BT_ALPHATEST;
  77                         else if (m_alphatest == 2)
  78                                 flags = gPainter::BT_ALPHABLEND;
  79                         painter.blit(m_pixmap, ePoint(0, 0), eRect(), flags);
  80                 }
  81
  82                 return 0;
  83         }
  84         case evtChangedPixmap:
  85                 checkSize();
  86                 invalidate();
  87                 return 0;
  88         case evtChangedSize:
  89                 checkSize();
  90                         /* fall trough. */
  91         default:
  92                 return eWidget::event(event, data, data2);
  93         }
  94 }