b2d3ceaec5
This is achieved by simplifying the logic in TextLayout. We get rid of all the various ways that the layout bounding rect can get cropped. Then we make sure to use the right pixel metrics. Finally we use the font's own line gap metrics instead of hard-coding 4. The end result is that text painted with vector fonts now gets pretty reasonable vertical alignment in most cases.
127 lines
3.6 KiB
C++
127 lines
3.6 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 <AK/Utf8View.h>
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#include <LibGUI/Label.h>
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#include <LibGUI/Painter.h>
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#include <LibGfx/Bitmap.h>
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#include <LibGfx/Palette.h>
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#include <LibGfx/TextLayout.h>
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#include <LibGfx/TextWrapping.h>
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REGISTER_WIDGET(GUI, Label)
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namespace GUI {
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Label::Label(DeprecatedString text)
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: m_text(move(text))
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{
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REGISTER_TEXT_ALIGNMENT_PROPERTY("text_alignment", text_alignment, set_text_alignment);
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REGISTER_TEXT_WRAPPING_PROPERTY("text_wrapping", text_wrapping, set_text_wrapping);
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set_preferred_size({ SpecialDimension::OpportunisticGrow });
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set_min_height(22);
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set_frame_thickness(0);
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set_frame_shadow(Gfx::FrameShadow::Plain);
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set_frame_shape(Gfx::FrameShape::NoFrame);
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set_foreground_role(Gfx::ColorRole::WindowText);
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REGISTER_STRING_PROPERTY("text", text, set_text);
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REGISTER_BOOL_PROPERTY("autosize", is_autosize, set_autosize);
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REGISTER_WRITE_ONLY_STRING_PROPERTY("icon", set_icon_from_path);
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}
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void Label::set_autosize(bool autosize, size_t padding)
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{
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if (m_autosize == autosize && m_autosize_padding == padding)
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return;
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m_autosize = autosize;
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m_autosize_padding = padding;
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if (m_autosize)
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size_to_fit();
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}
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void Label::set_icon(Gfx::Bitmap const* icon)
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{
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if (m_icon == icon)
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return;
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m_icon = icon;
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update();
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}
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void Label::set_icon_from_path(DeprecatedString const& path)
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{
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auto maybe_bitmap = Gfx::Bitmap::try_load_from_file(path);
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if (maybe_bitmap.is_error()) {
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dbgln("Unable to load bitmap `{}` for label icon", path);
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return;
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}
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set_icon(maybe_bitmap.release_value());
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}
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void Label::set_text(DeprecatedString text)
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{
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if (text == m_text)
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return;
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m_text = move(text);
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if (m_autosize)
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size_to_fit();
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update();
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did_change_text();
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}
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Gfx::IntRect Label::text_rect() const
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{
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return frame_inner_rect().shrunken(frame_thickness() > 0 ? font().glyph_width('x') : 0, 0);
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}
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void Label::paint_event(PaintEvent& event)
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{
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Frame::paint_event(event);
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Painter painter(*this);
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painter.add_clip_rect(event.rect());
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if (m_icon) {
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if (m_should_stretch_icon) {
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painter.draw_scaled_bitmap(frame_inner_rect(), *m_icon, m_icon->rect());
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} else {
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auto icon_location = frame_inner_rect().center().translated(-(m_icon->width() / 2), -(m_icon->height() / 2));
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painter.blit(icon_location, *m_icon, m_icon->rect());
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}
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}
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if (text().is_empty())
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return;
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auto text_rect = this->text_rect();
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if (is_enabled()) {
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painter.draw_text(text_rect, text(), text_alignment(), palette().color(foreground_role()), Gfx::TextElision::Right, text_wrapping());
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} else {
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painter.draw_text(text_rect.translated(1, 1), text(), font(), text_alignment(), palette().disabled_text_back(), Gfx::TextElision::Right, text_wrapping());
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painter.draw_text(text_rect, text(), font(), text_alignment(), palette().disabled_text_front(), Gfx::TextElision::Right, text_wrapping());
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}
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}
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void Label::size_to_fit()
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{
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set_fixed_width(static_cast<int>(ceilf(font().width(m_text))) + m_autosize_padding * 2);
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}
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int Label::text_calculated_preferred_height() const
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{
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return static_cast<int>(ceilf(Gfx::TextLayout(font(), Utf8View { m_text }, text_rect().to_type<float>()).bounding_rect(Gfx::TextWrapping::Wrap).height()));
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}
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Optional<UISize> Label::calculated_preferred_size() const
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{
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return GUI::UISize(SpecialDimension::Grow, text_calculated_preferred_height());
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}
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}
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