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Move draw order sorting into SceneElement

This commit is contained in:
Jonas Kulla 2013-09-06 13:10:41 +02:00
parent 5ca513fcec
commit 3bd9df1191
2 changed files with 19 additions and 5 deletions
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20
src/scene.cpp
View File

@ -38,12 +38,8 @@ void Scene::insert(SceneElement &element)
{ {
SceneElement *e = iter->data; SceneElement *e = iter->data;
if (element.z <= e->z) if (element < *e)
{ {
if (element.z == e->z)
if (element.creationStamp > e->creationStamp)
continue;
elements.insertBefore(element.link, *iter); elements.insertBefore(element.link, *iter);
return; return;
} }
@ -140,6 +136,20 @@ void SceneElement::setVisible(bool value)
visible = value; visible = value;
} }
bool SceneElement::operator<(const SceneElement &o) const
{
if (z <= o.z)
{
if (z == o.z)
if (creationStamp > o.creationStamp)
return false;
return true;
}
return false;
}
void SceneElement::unlink() void SceneElement::unlink()
{ {
scene->elements.remove(link); scene->elements.remove(link);

4
src/scene.h
View File

@ -81,6 +81,10 @@ protected:
virtual void draw() = 0; virtual void draw() = 0;
virtual void onGeometryChange(const Scene::Geometry &) {} virtual void onGeometryChange(const Scene::Geometry &) {}
/* Compares to elements in terms of their display priority;
* elements with lower priority are drawn earlier */
bool operator<(const SceneElement &o) const;
void unlink(); void unlink();
IntruListLink<SceneElement> link; IntruListLink<SceneElement> link;