ladybird/Userland/Libraries/LibGUI/LazyWidget.cpp

/*
 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
 * Copyright (c) 2022, the SerenityOS developers.
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include <LibGUI/LazyWidget.h>

REGISTER_WIDGET(GUI, LazyWidget)

namespace GUI {

void LazyWidget::show_event(ShowEvent&)
{
    if (m_has_been_shown)
        return;
    m_has_been_shown = true;

    VERIFY(on_first_show);
    on_first_show(*this);
}

}
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 09:38:21 +01:00			`/*`
			`* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>`
Libraries: Use default constructors/destructors in LibGUI https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#cother-other-default-operation-rules "The compiler is more likely to get the default semantics right and you cannot implement these functions better than the compiler." 2022-02-26 10:50:04 -07:00			`* Copyright (c) 2022, the SerenityOS developers.`
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 09:38:21 +01:00			`*`
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 * 2021-04-22 01:24:48 -07:00			`* 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 09:38:21 +01:00			`*/`

LibGUI: Remove leading G from filenames 2020-02-06 20:33:02 +01:00			`#include <LibGUI/LazyWidget.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. 2019-10-02 20:24:29 +02:00
LibGUI: Register LazyWidget 2022-03-18 23:28:06 +01:00			`REGISTER_WIDGET(GUI, LazyWidget)`

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 15:07:41 +01:00			`namespace GUI {`

			`void LazyWidget::show_event(ShowEvent&)`
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 20:24:29 +02:00			`{`
			`if (m_has_been_shown)`
			`return;`
			`m_has_been_shown = true;`

Everywhere: Rename ASSERT => VERIFY (...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED) Since all of these checks are done in release builds as well, let's rename them to VERIFY to prevent confusion, as everyone is used to assertions being compiled out in release. We can introduce a new ASSERT macro that is specifically for debug checks, but I'm doing this wholesale conversion first since we've accumulated thousands of these already, and it's not immediately obvious which ones are suitable for ASSERT. 2021-02-23 20:42:32 +01:00			`VERIFY(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. 2019-10-02 20:24:29 +02:00			`on_first_show(*this);`
			`}`
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 15:07:41 +01:00
			`}`