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https://github.com/SerenityOS/serenity
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4d0d0a99b4
Make a separate rect for the text and use IntRect::centered_within() to sidestep any subpixel jitter. This way it looks good with both bitmap and vector fonts.
73 lines
2.1 KiB
C++
73 lines
2.1 KiB
C++
/*
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* Copyright (c) 2018-2023, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2022, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibGUI/GroupBox.h>
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#include <LibGUI/Painter.h>
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#include <LibGfx/Font/Font.h>
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#include <LibGfx/Palette.h>
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#include <LibGfx/StylePainter.h>
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REGISTER_WIDGET(GUI, GroupBox)
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namespace GUI {
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GroupBox::GroupBox(StringView title)
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: m_title(title)
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{
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REGISTER_DEPRECATED_STRING_PROPERTY("title", title, set_title);
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}
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Margins GroupBox::content_margins() const
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{
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return {
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(!m_title.is_empty() ? font().pixel_size_rounded_up() + 1 /*room for the focus rect*/ : 2),
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2,
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2,
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2
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};
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}
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void GroupBox::paint_event(PaintEvent& event)
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{
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Painter painter(*this);
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painter.add_clip_rect(event.rect());
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Gfx::IntRect frame_rect {
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0, (!m_title.is_empty() ? font().pixel_size_rounded_up() / 2 : 0),
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width(), height() - (!m_title.is_empty() ? font().pixel_size_rounded_up() / 2 : 0)
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};
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Gfx::StylePainter::paint_frame(painter, frame_rect, palette(), Gfx::FrameStyle::SunkenBox);
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if (!m_title.is_empty()) {
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// Fill with button background behind the text (covering the frame).
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Gfx::IntRect text_background_rect { 6, 1, font().width_rounded_up(m_title) + 6, font().pixel_size_rounded_up() };
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painter.fill_rect(text_background_rect, palette().button());
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// Center text within button background rect to ensure symmetric padding on both sides.
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// Note that we don't use TextAlignment::Center here to avoid subpixel jitter.
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Gfx::IntRect text_rect { 0, 0, text_background_rect.width() - 6, text_background_rect.height() };
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text_rect.center_within(text_background_rect);
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painter.draw_text(text_rect, m_title, Gfx::TextAlignment::CenterLeft, palette().button_text());
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}
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}
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void GroupBox::fonts_change_event(FontsChangeEvent& event)
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{
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Widget::fonts_change_event(event);
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layout_relevant_change_occurred();
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}
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void GroupBox::set_title(StringView title)
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{
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if (m_title == title)
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return;
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m_title = title;
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update();
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}
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}
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