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LibCore: Make CObject reference-counted

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Okay, I've spent a whole day on this now, and it finally kinda works!
With this patch, CObject and all of its derived classes are reference
counted instead of tree-owned.

The previous, Qt-like model was nice and familiar, but ultimately also
outdated and difficult to reason about.

CObject-derived types should now be stored in RefPtr/NonnullRefPtr and
each class can be constructed using the forwarding construct() helper:

    auto widget = GWidget::construct(parent_widget);

Note that construct() simply forwards all arguments to an existing
constructor. It is inserted into each class by the C_OBJECT macro,
see CObject.h to understand how that works.

CObject::delete_later() disappears in this patch, as there is no longer
a single logical owner of a CObject.
This commit is contained in:
Andreas Kling 2019-09-22 00:17:53 +02:00
parent 0c72e0c09f
commit bc319d9e88
45 changed files with 174 additions and 233 deletions
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2
Applications/IRCClient/IRCAppWindow.cpp
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@ -171,7 +171,7 @@ void IRCAppWindow::setup_widgets()
toolbar->add_action(*m_open_query_action);
toolbar->add_action(*m_close_query_action);
auto outer_container = GWidget::construct(widget);
auto outer_container = GWidget::construct(widget.ptr());
outer_container->set_layout(make<GBoxLayout>(Orientation::Vertical));
outer_container->layout()->set_margins({ 2, 0, 2, 2 });