15a7dfbc30
Previously, if it was displaying N glyphs per line, then you changed font to one that was a drastically different size, it would continue to display N glyphs per line until you resized the window. Now, we immediately recalculate how many to show, so that they fill the available width. :^)
271 lines
9.1 KiB
C++
271 lines
9.1 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, Mustafa Quraish <mustafa@serenityos.org>
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* Copyright (c) 2022, Sam Atkins <atkinssj@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "GlyphMapWidget.h"
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#include <LibGUI/Painter.h>
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#include <LibGfx/BitmapFont.h>
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#include <LibGfx/Emoji.h>
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#include <LibGfx/Palette.h>
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REGISTER_WIDGET(GUI, GlyphMapWidget);
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namespace GUI {
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GlyphMapWidget::Selection GlyphMapWidget::Selection::normalized() const
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{
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if (m_size > 0)
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return *this;
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return { m_start + m_size, -m_size + 1 };
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}
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void GlyphMapWidget::Selection::resize_by(int i)
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{
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m_size += i;
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if (m_size == 0) {
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if (i < 0)
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m_size--;
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else
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m_size++;
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}
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}
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bool GlyphMapWidget::Selection::contains(int i) const
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{
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auto this_normalized = normalized();
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return i >= this_normalized.m_start && i < this_normalized.m_start + this_normalized.m_size;
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}
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void GlyphMapWidget::Selection::extend_to(int glyph)
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{
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m_size = glyph - m_start;
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if (m_size > 0)
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m_size++;
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}
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GlyphMapWidget::GlyphMapWidget()
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{
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set_focus_policy(FocusPolicy::StrongFocus);
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horizontal_scrollbar().set_visible(false);
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did_change_font();
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}
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GlyphMapWidget::~GlyphMapWidget()
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{
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}
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void GlyphMapWidget::resize_event(ResizeEvent& event)
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{
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recalculate_content_size();
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AbstractScrollableWidget::resize_event(event);
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}
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void GlyphMapWidget::set_active_glyph(int glyph, ShouldResetSelection should_reset_selection)
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{
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if (m_active_glyph == glyph)
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return;
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m_active_glyph = glyph;
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if (should_reset_selection == ShouldResetSelection::Yes) {
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m_selection.set_start(glyph);
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m_selection.set_size(1);
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}
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if (on_active_glyph_changed)
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on_active_glyph_changed(glyph);
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update();
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}
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Gfx::IntRect GlyphMapWidget::get_outer_rect(int glyph) const
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{
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int row = glyph / columns();
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int column = glyph % columns();
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return Gfx::IntRect {
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column * (font().max_glyph_width() + m_horizontal_spacing) + 1,
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row * (font().glyph_height() + m_vertical_spacing) + 1,
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font().max_glyph_width() + m_horizontal_spacing,
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font().glyph_height() + m_horizontal_spacing
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}
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.translated(frame_thickness() - horizontal_scrollbar().value(), frame_thickness() - vertical_scrollbar().value());
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}
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void GlyphMapWidget::update_glyph(int glyph)
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{
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update(get_outer_rect(glyph));
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}
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void GlyphMapWidget::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(widget_inner_rect());
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painter.add_clip_rect(event.rect());
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painter.set_font(font());
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painter.fill_rect(widget_inner_rect(), palette().inactive_window_title());
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int scroll_steps = vertical_scrollbar().value() / vertical_scrollbar().step();
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int first_visible_glyph = scroll_steps * columns();
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for (int glyph = first_visible_glyph; glyph <= first_visible_glyph + m_visible_glyphs && glyph < m_glyph_count; ++glyph) {
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Gfx::IntRect outer_rect = get_outer_rect(glyph);
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Gfx::IntRect inner_rect(
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outer_rect.x() + m_horizontal_spacing / 2,
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outer_rect.y() + m_vertical_spacing / 2,
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font().max_glyph_width(),
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font().glyph_height());
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if (m_selection.contains(glyph)) {
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painter.fill_rect(outer_rect, is_focused() ? palette().selection() : palette().inactive_selection());
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if (font().contains_glyph(glyph))
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painter.draw_glyph(inner_rect.location(), glyph, is_focused() ? palette().selection_text() : palette().inactive_selection_text());
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else if (auto* emoji = Gfx::Emoji::emoji_for_code_point(glyph))
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painter.draw_emoji(inner_rect.location(), *emoji, font());
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} else if (font().contains_glyph(glyph)) {
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painter.fill_rect(outer_rect, palette().base());
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painter.draw_glyph(inner_rect.location(), glyph, palette().base_text());
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} else if (auto* emoji = Gfx::Emoji::emoji_for_code_point(glyph)) {
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painter.fill_rect(outer_rect, Gfx::Color { 255, 150, 150 });
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painter.draw_emoji(inner_rect.location(), *emoji, font());
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}
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}
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painter.draw_focus_rect(get_outer_rect(m_active_glyph), Gfx::Color::Black);
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}
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void GlyphMapWidget::mousedown_event(MouseEvent& event)
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{
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Frame::mousedown_event(event);
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Gfx::IntPoint map_offset { frame_thickness() - horizontal_scrollbar().value(), frame_thickness() - vertical_scrollbar().value() };
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auto map_position = event.position() - map_offset;
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auto col = (map_position.x() - 1) / ((font().max_glyph_width() + m_horizontal_spacing));
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auto row = (map_position.y() - 1) / ((font().glyph_height() + m_vertical_spacing));
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auto glyph = row * columns() + col;
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if (row >= 0 && row < rows() && col >= 0 && col < columns() && glyph < m_glyph_count) {
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if (event.shift())
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m_selection.extend_to(glyph);
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else {
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m_selection.set_size(1);
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m_selection.set_start(glyph);
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}
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set_active_glyph(glyph, ShouldResetSelection::No);
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}
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}
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void GlyphMapWidget::keydown_event(KeyEvent& event)
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{
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Frame::keydown_event(event);
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if (!event.ctrl() && !event.shift()) {
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m_selection.set_size(1);
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m_selection.set_start(m_active_glyph);
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}
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if (event.key() == KeyCode::Key_Up) {
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if (m_selection.start() >= m_columns) {
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if (event.shift())
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m_selection.resize_by(-m_columns);
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else
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m_selection.set_start(m_selection.start() - m_columns);
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set_active_glyph(m_active_glyph - m_columns, ShouldResetSelection::No);
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scroll_to_glyph(m_active_glyph);
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return;
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}
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}
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if (event.key() == KeyCode::Key_Down) {
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if (m_selection.start() < m_glyph_count - m_columns) {
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if (event.shift())
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m_selection.resize_by(m_columns);
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else
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m_selection.set_start(m_selection.start() + m_columns);
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set_active_glyph(m_active_glyph + m_columns, ShouldResetSelection::No);
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scroll_to_glyph(m_active_glyph);
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return;
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}
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}
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if (event.key() == KeyCode::Key_Left) {
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if (m_selection.start() > 0) {
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if (event.shift())
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m_selection.resize_by(-1);
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else
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m_selection.set_start(m_selection.start() - 1);
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set_active_glyph(m_active_glyph - 1, ShouldResetSelection::No);
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scroll_to_glyph(m_active_glyph);
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return;
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}
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}
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if (event.key() == KeyCode::Key_Right) {
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if (m_selection.start() < m_glyph_count - 1) {
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if (event.shift())
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m_selection.resize_by(1);
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else
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m_selection.set_start(m_selection.start() + 1);
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set_active_glyph(m_active_glyph + 1, ShouldResetSelection::No);
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scroll_to_glyph(m_active_glyph);
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return;
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}
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}
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// FIXME: Support selection for these.
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if (event.ctrl() && event.key() == KeyCode::Key_Home) {
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set_active_glyph(0);
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scroll_to_glyph(m_active_glyph);
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return;
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}
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if (event.ctrl() && event.key() == KeyCode::Key_End) {
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set_active_glyph(m_glyph_count - 1);
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scroll_to_glyph(m_active_glyph);
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return;
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}
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if (!event.ctrl() && event.key() == KeyCode::Key_Home) {
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set_active_glyph(m_active_glyph / m_columns * m_columns);
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return;
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}
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if (!event.ctrl() && event.key() == KeyCode::Key_End) {
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int new_selection = m_active_glyph / m_columns * m_columns + (m_columns - 1);
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int max = m_glyph_count - 1;
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new_selection = clamp(new_selection, 0, max);
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set_active_glyph(new_selection);
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return;
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}
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}
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void GlyphMapWidget::did_change_font()
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{
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recalculate_content_size();
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vertical_scrollbar().set_step(font().glyph_height() + m_vertical_spacing);
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set_active_glyph('A');
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}
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void GlyphMapWidget::scroll_to_glyph(int glyph)
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{
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int row = glyph / columns();
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int column = glyph % columns();
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auto scroll_rect = Gfx::IntRect {
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column * (font().max_glyph_width() + m_horizontal_spacing) + 1,
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row * (font().glyph_height() + m_vertical_spacing) + 1,
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font().max_glyph_width() + m_horizontal_spacing,
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font().glyph_height() + m_horizontal_spacing
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};
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scroll_into_view(scroll_rect, true, true);
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}
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void GlyphMapWidget::recalculate_content_size()
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{
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auto inner_rect = frame_inner_rect();
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int event_width = inner_rect.width() - vertical_scrollbar().width() - m_horizontal_spacing;
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int event_height = inner_rect.height();
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m_visible_glyphs = (event_width * event_height) / (font().max_glyph_width() * font().glyph_height());
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m_columns = max(event_width / (font().max_glyph_width() + m_horizontal_spacing), 1);
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m_rows = ceil_div(m_glyph_count, m_columns);
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int content_width = columns() * (font().max_glyph_width() + m_horizontal_spacing);
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int content_height = rows() * (font().glyph_height() + m_vertical_spacing) + frame_thickness();
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set_content_size({ content_width, content_height });
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scroll_to_glyph(m_active_glyph);
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}
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}
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