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#include <lib/gui/ewidget.h>
#include <lib/gui/ewidgetdesktop.h>
extern void dumpRegion(const gRegion ®ion);
eWidget::eWidget(eWidget *parent): m_parent(parent ? parent->child() : 0)
{
m_vis = 0;
m_desktop = 0;
if (m_parent)
m_vis = wVisShow;
if (m_parent)
{
m_parent->m_childs.push_back(this);
m_parent->getStyle(m_style);
}
}
void eWidget::move(ePoint pos)
{
if (m_position == pos)
return;
m_position = pos;
/* we invalidate before and after the move to
cause a correct redraw. The area which is
included both before and after isn't redrawn
twice because a invalidate doesn't immediately
redraws the region. */
invalidate();
event(evtChangedPosition);
recalcClipRegionsWhenVisible();
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;
event(evtWillChangeSize, &size);
if (old_size == m_size)
return;
invalidate();
event(evtChangedSize);
recalcClipRegionsWhenVisible();
invalidate();
}
void eWidget::invalidate(const gRegion ®ion)
{
/* 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();
gRegion abs = m_visible_with_childs;
abs.moveBy(abspos);
root->m_desktop->invalidate(abs);
}
void eWidget::hide()
{
m_vis &= ~wVisShow;
/* 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->m_desktop->invalidate(abs);
}
void eWidget::destruct()
{
if (m_parent)
m_parent->m_childs.remove(this);
delete this;
}
eWidget::~eWidget()
{
if (m_parent)
m_parent->m_childs.remove(this);
/* 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::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, ®ion, &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();
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);
ePtr<eWindowStyle> style;
if (!getStyle(style))
style->paintBackground(painter, ePoint(0, 0), size());
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;
}
default:
return -1;
}
return 0;
}
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