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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outdated and difficult to reason about.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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12
Libraries/LibGUI/GFilePicker.cpp
View File

@@ -57,11 +57,11 @@ GFilePicker::GFilePicker(Mode mode, const StringView& file_name, const StringVie
horizontal_container->set_fill_with_background_color(true);
horizontal_container->set_background_color(Color::WarmGray);
auto vertical_container = GWidget::construct(horizontal_container);
auto vertical_container = GWidget::construct(horizontal_container.ptr());
vertical_container->set_layout(make<GBoxLayout>(Orientation::Vertical));
vertical_container->layout()->set_spacing(4);
auto upper_container = GWidget::construct(vertical_container);
auto upper_container = GWidget::construct(vertical_container.ptr());
upper_container->set_layout(make<GBoxLayout>(Orientation::Horizontal));
upper_container->layout()->set_spacing(4);
upper_container->set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
@@ -118,13 +118,13 @@ GFilePicker::GFilePicker(Mode mode, const StringView& file_name, const StringVie
});
toolbar->add_action(*mkdir_action);
auto lower_container = GWidget::construct(vertical_container);
auto lower_container = GWidget::construct(vertical_container.ptr());
lower_container->set_layout(make<GBoxLayout>(Orientation::Vertical));
lower_container->layout()->set_spacing(4);
lower_container->set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
lower_container->set_preferred_size(0, 60);
auto filename_container = GWidget::construct(lower_container);
auto filename_container = GWidget::construct(lower_container.ptr());
filename_container->set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
filename_container->set_preferred_size(0, 20);
filename_container->set_layout(make<GBoxLayout>(Orientation::Horizontal));
@@ -132,7 +132,7 @@ GFilePicker::GFilePicker(Mode mode, const StringView& file_name, const StringVie
filename_label->set_text_alignment(TextAlignment::CenterLeft);
filename_label->set_size_policy(SizePolicy::Fixed, SizePolicy::Fill);
filename_label->set_preferred_size(60, 0);
m_filename_textbox = GTextBox::construct(filename_container);
m_filename_textbox = GTextBox::construct(filename_container.ptr());
if (m_mode == Mode::Save) {
m_filename_textbox->set_text(file_name);
m_filename_textbox->set_focus(true);
@@ -155,7 +155,7 @@ GFilePicker::GFilePicker(Mode mode, const StringView& file_name, const StringVie
set_preview(path);
};
auto button_container = GWidget::construct(lower_container);
auto button_container = GWidget::construct(lower_container.ptr());
button_container->set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
button_container->set_preferred_size(0, 20);
button_container->set_layout(make<GBoxLayout>(Orientation::Horizontal));