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LibGUI: Rewrite layout system in terms of min and max sizes

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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. :^)
This commit is contained in:
Andreas Kling 2020-12-30 01:23:32 +01:00
parent b2bba5ce5c
commit 7dc5a3ead8
83 changed files with 444 additions and 957 deletions
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9
Applications/Piano/SamplerWidget.cpp
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@ -99,12 +99,10 @@ SamplerWidget::SamplerWidget(TrackManager& track_manager)
m_open_button_and_recorded_sample_name_container = add<GUI::Widget>();
m_open_button_and_recorded_sample_name_container->set_layout<GUI::HorizontalBoxLayout>();
m_open_button_and_recorded_sample_name_container->layout()->set_spacing(10);
m_open_button_and_recorded_sample_name_container->set_size_policy(GUI::SizePolicy::Fill, GUI::SizePolicy::Fixed);
m_open_button_and_recorded_sample_name_container->set_preferred_size(0, 24);
m_open_button_and_recorded_sample_name_container->set_fixed_height(24);
m_open_button = m_open_button_and_recorded_sample_name_container->add<GUI::Button>();
m_open_button->set_size_policy(GUI::SizePolicy::Fixed, GUI::SizePolicy::Fixed);
m_open_button->set_preferred_size(24, 24);
m_open_button->set_fixed_size(24, 24);
m_open_button->set_focus_policy(GUI::FocusPolicy::TabFocus);
m_open_button->set_icon(Gfx::Bitmap::load_from_file("/res/icons/16x16/open.png"));
m_open_button->on_click = [this](auto) {
@ -124,8 +122,7 @@ SamplerWidget::SamplerWidget(TrackManager& track_manager)
m_recorded_sample_name->set_text_alignment(Gfx::TextAlignment::CenterLeft);
m_wave_editor = add<WaveEditor>(m_track_manager);
m_wave_editor->set_size_policy(GUI::SizePolicy::Fill, GUI::SizePolicy::Fixed);
m_wave_editor->set_preferred_size(0, 100);
m_wave_editor->set_fixed_height(100);
}
SamplerWidget::~SamplerWidget()