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ladybird/Userland/Libraries/LibGUI/LazyWidget.h

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Meta: Add license header to source files As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header.
2020-01-18 11:38:21 +03:00
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
Everything: Move to SPDX license identifiers in all files. SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
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* SPDX-License-Identifier: BSD-2-Clause
Meta: Add license header to source files As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header.
2020-01-18 11:38:21 +03:00
*/
LibGUI: Add GLazyWidget, a convenience widget for lazily-built UI's Here's how you can use this to speed up startup time: auto widget = GLazyWidget::construct(); widget->on_first_show = [](auto& self) { self.set_layout(...); ... }; Basically, it allows you to delay building the widget subtree until it's shown for the first time.
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#pragma once
LibGUI: Remove leading G from filenames
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#include <LibGUI/Widget.h>
LibGUI: Add GLazyWidget, a convenience widget for lazily-built UI's Here's how you can use this to speed up startup time: auto widget = GLazyWidget::construct(); widget->on_first_show = [](auto& self) { self.set_layout(...); ... }; Basically, it allows you to delay building the widget subtree until it's shown for the first time.
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LibGUI: Put all classes in the GUI namespace and remove the leading G This took me a moment. Welcome to the new world of GUI::Widget! :^)
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namespace GUI {
class LazyWidget : public Widget {
C_OBJECT(LazyWidget)
LibGUI: Add GLazyWidget, a convenience widget for lazily-built UI's Here's how you can use this to speed up startup time: auto widget = GLazyWidget::construct(); widget->on_first_show = [](auto& self) { self.set_layout(...); ... }; Basically, it allows you to delay building the widget subtree until it's shown for the first time.
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public:
LibGUI: Put all classes in the GUI namespace and remove the leading G This took me a moment. Welcome to the new world of GUI::Widget! :^)
2020-02-02 17:07:41 +03:00
virtual ~LazyWidget() override;
LibGUI: Add GLazyWidget, a convenience widget for lazily-built UI's Here's how you can use this to speed up startup time: auto widget = GLazyWidget::construct(); widget->on_first_show = [](auto& self) { self.set_layout(...); ... }; Basically, it allows you to delay building the widget subtree until it's shown for the first time.
2019-10-02 21:24:29 +03:00
LibGUI: Put all classes in the GUI namespace and remove the leading G This took me a moment. Welcome to the new world of GUI::Widget! :^)
2020-02-02 17:07:41 +03:00
Function<void(LazyWidget&)> on_first_show;
LibGUI: Add GLazyWidget, a convenience widget for lazily-built UI's Here's how you can use this to speed up startup time: auto widget = GLazyWidget::construct(); widget->on_first_show = [](auto& self) { self.set_layout(...); ... }; Basically, it allows you to delay building the widget subtree until it's shown for the first time.
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protected:
LibGUI: Remove parent parameter to GUI::Widget constructor
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LazyWidget();
LibGUI: Add GLazyWidget, a convenience widget for lazily-built UI's Here's how you can use this to speed up startup time: auto widget = GLazyWidget::construct(); widget->on_first_show = [](auto& self) { self.set_layout(...); ... }; Basically, it allows you to delay building the widget subtree until it's shown for the first time.
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private:
LibGUI: Put all classes in the GUI namespace and remove the leading G This took me a moment. Welcome to the new world of GUI::Widget! :^)
2020-02-02 17:07:41 +03:00
virtual void show_event(ShowEvent&) override;
LibGUI: Add GLazyWidget, a convenience widget for lazily-built UI's Here's how you can use this to speed up startup time: auto widget = GLazyWidget::construct(); widget->on_first_show = [](auto& self) { self.set_layout(...); ... }; Basically, it allows you to delay building the widget subtree until it's shown for the first time.
2019-10-02 21:24:29 +03:00
bool m_has_been_shown { false };
};
LibGUI: Put all classes in the GUI namespace and remove the leading G This took me a moment. Welcome to the new world of GUI::Widget! :^)
2020-02-02 17:07:41 +03:00
}
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