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LibGUI: Rewrite layout system in terms of min and max sizes
This patch removes size policies and preferred sizes, and replaces them with min-size and max-size for each widget. Box layout now works in 3 passes: 1) Set all items (widgets/spacers) to their min-size 2) Distribute remaining space evenly, respecting max-size 3) Place widgets one after the other, adding spacing in between I've also added convenience helpers for setting a fixed size (which is the same as setting min-size and max-size to the same value.) This significantly reduces the verbosity of widget layout and makes GML a bit more pleasant to write, too. :^)
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83 changed files with 444 additions and 957 deletions
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@ -542,10 +542,10 @@ void Window::set_main_widget(Widget* widget)
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if (m_main_widget) {
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add_child(*widget);
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auto new_window_rect = rect();
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if (m_main_widget->horizontal_size_policy() == SizePolicy::Fixed)
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new_window_rect.set_width(m_main_widget->preferred_size().width());
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if (m_main_widget->vertical_size_policy() == SizePolicy::Fixed)
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new_window_rect.set_height(m_main_widget->preferred_size().height());
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if (m_main_widget->min_width() >= 0)
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new_window_rect.set_width(max(new_window_rect.width(), m_main_widget->min_width()));
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if (m_main_widget->min_height() >= 0)
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new_window_rect.set_height(max(new_window_rect.height(), m_main_widget->min_height()));
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set_rect(new_window_rect);
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m_main_widget->set_relative_rect({ {}, new_window_rect.size() });
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m_main_widget->set_window(this);
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