fix linked tuners (i hope)
[enigma2.git] / lib / gui / ewidget.cpp
index e69de29..b047f5f 100644 (file)
@@ -0,0 +1,319 @@
+#include <lib/gui/ewidget.h>
+#include <lib/gui/ewidgetdesktop.h>
+
+extern void dumpRegion(const gRegion &region);
+
+eWidget::eWidget(eWidget *parent): m_animation(this), m_parent(parent ? parent->child() : 0)
+{
+       m_vis = 0;
+       m_desktop = 0;
+       m_have_background_color = 0;
+       m_z_position = 0;
+       
+       m_client_offset = eSize(0, 0);
+       
+       if (m_parent)
+               m_vis = wVisShow;
+       
+       if (m_parent)
+       {
+               insertIntoParent();
+               m_parent->getStyle(m_style);
+       }
+
+       m_current_focus = 0;
+       m_focus_owner = 0;
+}
+
+void eWidget::move(ePoint pos)
+{
+       pos = pos + m_client_offset;
+       
+       if (m_position == pos)
+               return;
+
+       m_position = pos;
+       
+       event(evtChangedPosition);
+       recalcClipRegionsWhenVisible();
+       
+               /* try native move if supported. */
+       if ((m_vis & wVisShow) && ((!m_desktop) || m_desktop->movedWidget(this)))
+               invalidate();
+}
+
+void eWidget::resize(eSize size)
+{
+               /* same strategy as with move: we first check if
+                  the size changed at all, and if it did, we
+                  invalidate both the old and new area. 
+                  TODO: check if either the old or new area
+                  fits into the other completely, and invalidate
+                  only once. */
+       eSize old_size = m_size;
+       eSize old_offset = m_client_offset;
+       m_client_offset = eSize(0, 0);
+       event(evtWillChangeSize, &size, &m_client_offset);
+       if (old_size == m_size)
+               return;
+       
+       move(position() - old_offset);
+       
+       invalidate();
+       event(evtChangedSize);
+       recalcClipRegionsWhenVisible(); 
+       invalidate();
+}
+
+void eWidget::invalidate(const gRegion &region)
+{
+               /* we determine the area to redraw, and re-position this
+                  area to the absolute position, and then call the
+                  desktop's invalidate() with that, which adds this
+                  area into the dirty region. */
+       gRegion res = m_visible_with_childs;
+       if (region.valid())
+               res &= region;
+
+       if (res.empty())
+               return;
+       
+       eWidget *root = this;
+       ePoint abspos = position();
+       while (root && !root->m_desktop)
+       {
+               root = root->m_parent;
+               assert(root);
+               abspos += root->position();
+       }
+       
+       res.moveBy(abspos);
+//     eDebug("region to invalidate:");
+//     dumpRegion(res);
+       root->m_desktop->invalidate(res);
+}
+
+void eWidget::show()
+{
+       if (m_vis & wVisShow)
+               return;
+       
+       m_vis |=  wVisShow;
+
+               /* TODO: optimize here to only recalc what's required. possibly merge with hide. */
+       eWidget *root = this;
+       ePoint abspos = position();
+       while (root && !root->m_desktop)
+       {
+               root = root->m_parent;
+               assert(root);
+               abspos += root->position();
+       }
+
+       root->m_desktop->recalcClipRegions(root);
+
+       gRegion abs = m_visible_with_childs;
+       abs.moveBy(abspos);
+       root->m_desktop->invalidate(abs);
+}
+
+void eWidget::hide()
+{
+               /* TODO: when hiding an upper level widget, widgets get hidden but keep the */
+               /* wVisShow flag (because when the widget is shown again, the widgets must */
+               /* become visible again. */
+       if (!(m_vis & wVisShow))
+               return;
+       m_vis &= ~wVisShow;
+       
+               /* this is a workaround to the above problem. when we are in the delete phase, 
+                  don't hide childs. */
+       if (!(m_parent || m_desktop))
+               return;
+
+               /* TODO: optimize here to only recalc what's required. possibly merge with show. */
+       eWidget *root = this;
+       ePoint abspos = position();
+       while (root && !root->m_desktop)
+       {
+               root = root->m_parent;
+               abspos += root->position();
+       }
+       assert(root->m_desktop);
+
+       gRegion abs = m_visible_with_childs;
+       abs.moveBy(abspos);
+
+       root->m_desktop->recalcClipRegions(root);
+       root->m_desktop->invalidate(abs);
+}
+
+void eWidget::destruct()
+{
+       if (m_parent)
+               m_parent->m_childs.remove(this);
+       delete this;
+}
+
+void eWidget::setBackgroundColor(const gRGB &col)
+{
+       m_background_color = col;
+       m_have_background_color = 1;
+}
+
+void eWidget::clearBackgroundColor()
+{
+       m_have_background_color = 0;
+}
+
+void eWidget::setZPosition(int z)
+{
+       m_z_position = z;
+       if (!m_parent)
+               return;
+       
+       m_parent->m_childs.remove(this);
+       
+       insertIntoParent(); /* now at the new Z position */
+}
+
+void eWidget::mayKillFocus()
+{
+       setFocus(0);
+               /* when we have the focus, remove it first. */
+       if (m_focus_owner)
+               m_focus_owner->setFocus(0);
+}
+
+eWidget::~eWidget()
+{
+       hide();
+       
+       if (m_parent)
+               m_parent->m_childs.remove(this);
+
+       m_parent = 0;
+
+               /* destroy all childs */
+       ePtrList<eWidget>::iterator i(m_childs.begin());
+       while (i != m_childs.end())
+       {
+               (*i)->m_parent = 0;
+               delete *i;
+               i = m_childs.erase(i);
+       }
+}
+
+void eWidget::insertIntoParent()
+{
+       ePtrList<eWidget>::iterator i = m_parent->m_childs.begin();
+       
+       for(;;)
+       {
+               if ((i == m_parent->m_childs.end()) || (i->m_z_position > m_z_position))
+               {
+                       m_parent->m_childs.insert(i, this);
+                       return;
+               }
+               ++i;
+       }
+}
+
+void eWidget::doPaint(gPainter &painter, const gRegion &r)
+{
+       if (m_visible_with_childs.empty())
+               return;
+       
+       gRegion region = r;
+                       /* we were in parent's space, now we are in local space */
+       region.moveBy(-position());
+       
+       painter.moveOffset(position());
+               /* walk all childs */
+       for (ePtrList<eWidget>::iterator i(m_childs.begin()); i != m_childs.end(); ++i)
+               i->doPaint(painter, region);
+       
+               /* check if there's anything for us to paint */
+       region &= m_visible_region;
+       
+       if (!region.empty())
+       {
+               painter.resetClip(region);
+               event(evtPaint, &region, &painter);
+       }
+       
+       painter.moveOffset(-position());
+}
+
+void eWidget::recalcClipRegionsWhenVisible()
+{
+       eWidget *t = this;
+       do
+       {
+               if (!(t->m_vis & wVisShow))
+                       break;
+               if (t->m_desktop)
+               {
+                       t->m_desktop->recalcClipRegions(t);
+                       break;
+               }
+               t = t->m_parent;
+               assert(t);
+       } while(1);
+}
+
+int eWidget::event(int event, void *data, void *data2)
+{
+       switch (event)
+       {
+       case evtPaint:
+       {
+               gPainter &painter = *(gPainter*)data2;
+               
+//             eDebug("eWidget::evtPaint");
+//             dumpRegion(*(gRegion*)data);
+               if (!m_have_background_color)
+               {
+                       ePtr<eWindowStyle> style;
+                       if (!getStyle(style))
+                               style->paintBackground(painter, ePoint(0, 0), size());
+               } else
+               {
+                       painter.setBackgroundColor(m_background_color);
+                       painter.clear();
+               }
+               break;
+       }
+       case evtKey:
+               break;
+       case evtWillChangeSize:
+               m_size = *static_cast<eSize*>(data);
+               break;
+       case evtChangedSize:
+       {
+               m_clip_region = gRegion(eRect(ePoint(0, 0),  m_size));
+               break;
+       }
+       case evtFocusGot:
+               m_focus_owner = (eWidget*)data;
+               break;
+       case evtFocusLost:
+               m_focus_owner = 0;
+               break;
+       default:
+               return -1;
+       }
+       return 0;
+}
+
+void eWidget::setFocus(eWidget *focus)
+{
+       if (m_current_focus)
+               m_current_focus->event(evtFocusLost, this);
+       
+       m_current_focus = focus;
+
+       if (m_current_focus)
+               m_current_focus->event(evtFocusGot, this);
+}
+