lib/gui/ewidgetdesktop.cpp

   1 #include <lib/gui/ewidgetdesktop.h>
   2 #include <lib/gui/ewidget.h>
   3 #include <lib/base/ebase.h>
   4
   5 void eWidgetDesktop::addRootWidget(eWidget *root, int top)
   6 {
   7         assert(!root->m_desktop);
   8         if (!top)
   9                 m_root.push_back(root);
  10         else
  11                 m_root.push_front(root);
  12         root->m_desktop = this;
  13 }
  14
  15 void eWidgetDesktop::removeRootWidget(eWidget *root)
  16 {
  17         m_root.remove(root);
  18 }
  19
  20 void eWidgetDesktop::calcWidgetClipRegion(eWidget *widget, gRegion &parent_visible)
  21 {
  22                 /* start with our clip region, clipped with the parent's */
  23         if (widget->m_vis & eWidget::wVisShow)
  24         {
  25                 widget->m_visible_region = widget->m_clip_region;
  26                 widget->m_visible_region.moveBy(widget->position());
  27                 widget->m_visible_region &= parent_visible; // in parent space!
  28                         /* TODO: check transparency here! */
  29                         /* remove everything this widget will contain from parent's visible list */
  30                 parent_visible -= widget->m_visible_region; // will remove child regions too!
  31
  32                         /* now prepare for recursing to childs */
  33                 widget->m_visible_region.moveBy(-widget->position());            // now in local space
  34         } else
  35                 widget->m_visible_region = gRegion();
  36
  37         widget->m_visible_with_childs = widget->m_visible_region;
  38
  39         for (ePtrList<eWidget>::iterator i(widget->m_childs.begin()); i != widget->m_childs.end(); ++i)
  40                 calcWidgetClipRegion(*i, widget->m_visible_region);
  41 }
  42
  43 void eWidgetDesktop::recalcClipRegions()
  44 {
  45         m_background_region = gRegion(eRect(ePoint(0, 0), m_screen_size));
  46
  47         for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
  48                 calcWidgetClipRegion(*i, m_background_region);
  49 }
  50
  51 void eWidgetDesktop::invalidate(const gRegion &region)
  52 {
  53         if (m_timer && m_dirty_region.empty())
  54                 m_timer->start(0, 1); // start singleshot redraw timer
  55         m_dirty_region |= region;
  56 }
  57
  58 void eWidgetDesktop::setBackgroundColor(gColor col)
  59 {
  60         m_background_color = col;
  61
  62                 /* if there's something visible from the background, redraw it with the new color. */
  63         if (m_dc && m_background_region.valid() && !m_background_region.empty())
  64         {
  65                         /* todo: split out "setBackgroundColor / clear"... maybe? */
  66                 gPainter painter(m_dc);
  67                 painter.resetClip(m_background_region);
  68                 painter.setBackgroundColor(m_background_color);
  69                 painter.clear();
  70         }
  71 }
  72
  73 void eWidgetDesktop::paint()
  74 {
  75         gPainter painter(m_dc);
  76                 /* walk all root windows. */
  77         for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
  78                 i->doPaint(painter, m_dirty_region);
  79         m_dirty_region &= m_background_region;
  80
  81         painter.resetClip(m_dirty_region);
  82         painter.setBackgroundColor(m_background_color);
  83         painter.clear();
  84
  85         painter.flush();
  86
  87         m_dirty_region = gRegion();
  88 }
  89
  90 void eWidgetDesktop::setDC(gDC *dc)
  91 {
  92         m_dc = dc;
  93 }
  94
  95 void eWidgetDesktop::setRedrawTask(eMainloop &ml)
  96 {
  97         if (m_mainloop)
  98         {
  99                 delete m_timer;
 100                 m_timer = 0;
 101                 m_mainloop = 0;
 102         }
 103         m_mainloop = &ml;
 104         m_timer = new eTimer(m_mainloop);
 105         CONNECT(m_timer->timeout, eWidgetDesktop::paint);
 106
 107         if (!m_dirty_region.empty())
 108                 m_timer->start(0, 1);
 109 }
 110
 111 void eWidgetDesktop::makeCompatiblePixmap(gPixmap &pm)
 112 {
 113         eDebug("widgetDesktop: make compatible pixmap of %p\n", &pm);
 114         if (!m_dc)
 115         {
 116                 eWarning("eWidgetDesktop: no DC to make pixmap compatible with!");
 117                 return;
 118         }
 119         eDebug("painter..");
 120         gPainter painter(m_dc);
 121         eDebug("merge!");
 122         painter.mergePalette(&pm);
 123         eDebug("gone!");
 124 }
 125
 126 eWidgetDesktop::eWidgetDesktop(eSize size): m_screen_size(size), m_mainloop(0), m_timer(0)
 127 {
 128 }
 129
 130 eWidgetDesktop::~eWidgetDesktop()
 131 {
 132 }
 133