56081cdb6e
Currently, navigating through different years in the Year view of the Calendar app or the taskbar is very slow. Profiling results show that almost all the time is spent in `Calendar::update_tiles`, and specifically, in `DateTime::create` and `DateTime::set_time`. Performance can improve substantially if the `TZ` environment variable is set [0], but we can improve the current code to perform better nevertheless :^) This diff focuses on removing the need of the `Tile` struct to require the instantiation of a `DateTime` object, which avoids _at least_ 365 object instantiations in the Year view, on each `update_tiles` call. Instead, as the `date_time` isn't used often, we can instantiate it on demand when a particular date is selected. [0] https://blog.packagecloud.io/set-environment-variable-save-thousands-of-system-calls/
133 lines
3.6 KiB
C++
133 lines
3.6 KiB
C++
/*
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* Copyright (c) 2019-2020, Ryan Grieb <ryan.m.grieb@gmail.com>
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* Copyright (c) 2020-2022, 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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#pragma once
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#include <AK/String.h>
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#include <LibCore/DateTime.h>
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#include <LibGUI/Frame.h>
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#include <LibGUI/Widget.h>
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namespace GUI {
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class Calendar final : public GUI::Frame {
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C_OBJECT(Calendar)
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public:
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enum Mode {
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Month,
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Year
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};
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enum Format {
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ShortMonthYear,
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LongMonthYear,
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MonthOnly,
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YearOnly
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};
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void set_selected_date(Core::DateTime date_time) { m_selected_date = date_time; }
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Core::DateTime selected_date() const { return m_selected_date; }
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void set_view_date(unsigned year, unsigned month)
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{
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m_view_year = year;
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m_view_month = month;
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}
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unsigned view_year() const { return m_view_year; }
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unsigned view_month() const { return m_view_month; }
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String formatted_date(Format format = LongMonthYear);
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Mode mode() const { return m_mode; }
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void toggle_mode();
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void update_tiles(unsigned year, unsigned month);
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void set_grid(bool);
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bool has_grid() const { return m_grid; }
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void set_show_year(bool b) { m_show_year = b; }
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bool is_showing_year() const { return m_show_year; }
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void set_show_month_and_year(bool b) { m_show_month_year = b; }
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bool is_showing_month_and_year() const { return m_show_month_year; }
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void set_show_days_of_the_week(bool b) { m_show_days = b; }
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bool is_showing_days_of_the_week() const { return m_show_days; }
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Gfx::IntSize unadjusted_tile_size() const { return m_unadjusted_tile_size; }
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void set_unadjusted_tile_size(int width, int height)
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{
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m_unadjusted_tile_size.set_width(width);
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m_unadjusted_tile_size.set_height(height);
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}
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Function<void()> on_tile_click;
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Function<void()> on_tile_doubleclick;
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Function<void()> on_month_click;
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private:
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Calendar(Core::DateTime date_time = Core::DateTime::now(), Mode mode = Month);
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virtual ~Calendar() override = default;
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virtual void resize_event(GUI::ResizeEvent&) override;
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virtual void paint_event(GUI::PaintEvent&) override;
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virtual void mousemove_event(GUI::MouseEvent&) override;
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virtual void mousedown_event(MouseEvent&) override;
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virtual void mouseup_event(MouseEvent&) override;
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virtual void doubleclick_event(MouseEvent&) override;
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virtual void leave_event(Core::Event&) override;
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struct Day {
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String name;
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int width { 0 };
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int height { 16 };
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};
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Vector<Day> m_days;
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struct MonthTile {
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String name;
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Gfx::IntRect rect;
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int width { 0 };
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int height { 0 };
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bool is_hovered { false };
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bool is_being_pressed { false };
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};
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Vector<MonthTile> m_months;
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struct Tile {
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unsigned year;
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unsigned month;
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unsigned day;
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Gfx::IntRect rect;
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int width { 0 };
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int height { 0 };
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bool is_today { false };
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bool is_selected { false };
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bool is_hovered { false };
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bool is_outside_selected_month { false };
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};
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Vector<Tile> m_tiles[12];
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bool m_grid { true };
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bool m_show_month_year { true };
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bool m_show_days { true };
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bool m_show_year { false };
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bool m_show_month_tiles { false };
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int m_currently_pressed_index { -1 };
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unsigned m_view_year;
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unsigned m_view_month;
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Core::DateTime m_selected_date;
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Core::DateTime m_previous_selected_date;
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Gfx::IntSize m_unadjusted_tile_size;
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Gfx::IntSize m_event_size;
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Gfx::IntSize m_month_size[12];
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Mode m_mode { Month };
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};
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}
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