1 files changed, 72 insertions, 0 deletions
diff --git a/lib/gui/ewidgetdesktop.cpp b/lib/gui/ewidgetdesktop.cpp
new file mode 100644
index 00000000..10c92b71
--- /dev/null
+++ b/lib/gui/ewidgetdesktop.cpp
@@ -0,0 +1,72 @@
+#include <lib/gui/ewidgetdesktop.h>
+#include <lib/gui/ewidget.h>
+
+void eWidgetDesktop::addRootWidget(eWidget *root, int top)
+{
+	assert(!root->m_desktop);
+	if (!top)
+		m_root.push_back(root);
+	else
+		m_root.push_front(root);
+	root->m_desktop = this;
+}
+
+void eWidgetDesktop::calcWidgetClipRegion(eWidget *widget, gRegion &parent_visible)
+{
+		/* start with our clip region, clipped with the parent's */
+	if (widget->m_vis & eWidget::wVisShow)
+	{
+		widget->m_visible_region = widget->m_clip_region;
+		widget->m_visible_region.moveBy(widget->position());
+		widget->m_visible_region &= parent_visible; // in parent space!
+			/* TODO: check transparency here! */
+			/* remove everything this widget will contain from parent's visible list */
+		parent_visible -= widget->m_visible_region; // will remove child regions too!
+
+			/* now prepare for recursing to childs */
+		widget->m_visible_region.moveBy(-widget->position());            // now in local space
+	} else
+		widget->m_visible_region = gRegion();
+
+	widget->m_visible_with_childs = widget->m_visible_region;
+	
+	for (ePtrList<eWidget>::iterator i(widget->m_childs.begin()); i != widget->m_childs.end(); ++i)
+		calcWidgetClipRegion(*i, widget->m_visible_region);
+}
+
+void eWidgetDesktop::recalcClipRegions()
+{
+	gRegion screen = gRegion(eRect(ePoint(0, 0), m_screen_size));
+	
+	for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
+		calcWidgetClipRegion(*i, screen);
+//	dumpRegion(screen);
+}
+
+void eWidgetDesktop::invalidate(const gRegion &region)
+{
+	m_dirty_region |= region;
+}
+
+void eWidgetDesktop::paint()
+{
+	gPainter painter(m_dc);
+		/* walk all root windows. */
+	for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
+		i->doPaint(painter, m_dirty_region);
+	m_dirty_region = gRegion();
+}
+
+void eWidgetDesktop::setDC(gDC *dc)
+{
+	m_dc = dc;
+}
+
+eWidgetDesktop::eWidgetDesktop(eSize size): m_screen_size(size)
+{
+}
+
+eWidgetDesktop::~eWidgetDesktop()
+{
+}
+