Demos: Move to Userland/Demos/

Userland/Demos/Eyes/CMakeLists.txt

@@ -0,0 +1,7 @@
+set(SOURCES
+    main.cpp
+    EyesWidget.cpp
+)
+
+serenity_app(Eyes ICON app-eyes)
+target_link_libraries(Eyes LibGUI LibGfx)

Userland/Demos/Eyes/EyesWidget.cpp

@@ -0,0 +1,137 @@
+/*
+ * Copyright (c) 2020, Sergey Bugaev <bugaevc@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "EyesWidget.h"
+#include <LibGUI/Painter.h>
+#include <LibGUI/Window.h>
+#include <LibGUI/WindowServerConnection.h>
+#include <LibGfx/Palette.h>
+#include <math.h>
+
+EyesWidget::~EyesWidget()
+{
+}
+
+void EyesWidget::track_cursor_globally()
+{
+    ASSERT(window());
+    auto window_id = window()->window_id();
+    ASSERT(window_id >= 0);
+
+    set_global_cursor_tracking(true);
+    GUI::WindowServerConnection::the().send_sync<Messages::WindowServer::SetGlobalCursorTracking>(window_id, true);
+}
+
+void EyesWidget::mousemove_event(GUI::MouseEvent& event)
+{
+    m_mouse_position = event.position();
+    update();
+}
+
+void EyesWidget::paint_event(GUI::PaintEvent& event)
+{
+    GUI::Painter painter(*this);
+
+    painter.clear_rect(event.rect(), Gfx::Color());
+
+    for (int i = 0; i < m_full_rows; i++) {
+        for (int j = 0; j < m_eyes_in_row; j++)
+            render_eyeball(i, j, painter);
+    }
+    for (int i = 0; i < m_extra_columns; ++i)
+        render_eyeball(m_full_rows, i, painter);
+}
+
+void EyesWidget::render_eyeball(int row, int column, GUI::Painter& painter) const
+{
+    auto eye_width = width() / m_eyes_in_row;
+    auto eye_height = height() / m_num_rows;
+    Gfx::IntRect bounds { column * eye_width, row * eye_height, eye_width, eye_height };
+    auto width_thickness = max(int(eye_width / 5.5), 1);
+    auto height_thickness = max(int(eye_height / 5.5), 1);
+
+    bounds.shrink(int(eye_width / 12.5), 0);
+    painter.fill_ellipse(bounds, palette().base_text());
+    bounds.shrink(width_thickness, height_thickness);
+    painter.fill_ellipse(bounds, palette().base());
+
+    Gfx::IntPoint pupil_center = this->pupil_center(bounds);
+    Gfx::IntSize pupil_size {
+        bounds.width() / 5,
+        bounds.height() / 5
+    };
+    Gfx::IntRect pupil {
+        pupil_center.x() - pupil_size.width() / 2,
+        pupil_center.y() - pupil_size.height() / 2,
+        pupil_size.width(),
+        pupil_size.height()
+    };
+
+    painter.fill_ellipse(pupil, palette().base_text());
+}
+
+Gfx::IntPoint EyesWidget::pupil_center(Gfx::IntRect& eyeball_bounds) const
+{
+    auto mouse_vector = m_mouse_position - eyeball_bounds.center();
+    double dx = mouse_vector.x();
+    double dy = mouse_vector.y();
+    double mouse_distance = sqrt(dx * dx + dy * dy);
+
+    if (mouse_distance == 0.0)
+        return eyeball_bounds.center();
+
+    double width_squared = eyeball_bounds.width() * eyeball_bounds.width();
+    double height_squared = eyeball_bounds.height() * eyeball_bounds.height();
+
+    double max_distance_along_this_direction;
+
+    // clang-format off
+    if (dx != 0 && abs(dx) >= abs(dy)) {
+        double slope = dy / dx;
+        double slope_squared = slope * slope;
+        max_distance_along_this_direction = 0.25 * sqrt(
+            (slope_squared + 1) /
+            (1 / width_squared + slope_squared / height_squared)
+        );
+    } else if (dy != 0 && abs(dy) >= abs(dx)) {
+        double slope = dx / dy;
+        double slope_squared = slope * slope;
+        max_distance_along_this_direction = 0.25 * sqrt(
+            (slope_squared + 1) /
+            (slope_squared / width_squared + 1 / height_squared)
+        );
+    } else {
+        ASSERT_NOT_REACHED();
+    }
+    // clang-format on
+
+    double scale = min(1.0, max_distance_along_this_direction / mouse_distance);
+
+    return {
+        eyeball_bounds.center().x() + int(dx * scale),
+        eyeball_bounds.center().y() + int(dy * scale)
+    };
+}

Userland/Demos/Eyes/EyesWidget.h

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2020, Sergey Bugaev <bugaevc@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <LibGUI/Widget.h>
+#include <LibGfx/Point.h>
+
+class EyesWidget final : public GUI::Widget {
+    C_OBJECT(EyesWidget)
+
+public:
+    virtual ~EyesWidget();
+    void track_cursor_globally();
+
+private:
+    EyesWidget(int num_eyes, int full_rows, int extra)
+        : m_full_rows(full_rows)
+        , m_extra_columns(extra)
+    {
+        m_num_rows = m_extra_columns > 0 ? m_full_rows + 1 : m_full_rows;
+        m_eyes_in_row = m_full_rows > 0 ? (num_eyes - m_extra_columns) / m_full_rows : m_extra_columns;
+    }
+
+    virtual void mousemove_event(GUI::MouseEvent&) override;
+    virtual void paint_event(GUI::PaintEvent&) override;
+
+    void render_eyeball(int row, int column, GUI::Painter&) const;
+    Gfx::IntPoint pupil_center(Gfx::IntRect& eyeball_bounds) const;
+
+    Gfx::IntPoint m_mouse_position;
+    int m_eyes_in_row { -1 };
+    int m_full_rows { -1 };
+    int m_extra_columns { -1 };
+    int m_num_rows { -1 };
+};

Userland/Demos/Eyes/main.cpp

@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2020, Sergey Bugaev <bugaevc@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "EyesWidget.h"
+#include <LibCore/ArgsParser.h>
+#include <LibGUI/Application.h>
+#include <LibGUI/Icon.h>
+#include <LibGUI/Menu.h>
+#include <LibGUI/MenuBar.h>
+#include <LibGUI/Window.h>
+#include <LibGfx/Bitmap.h>
+
+int main(int argc, char* argv[])
+{
+    int num_eyes = 2;
+    int max_in_row = 13;
+
+    // Alternatively, allow the user to ask for a grid.
+    int grid_rows = -1;
+    int grid_columns = -1;
+
+    Core::ArgsParser args_parser;
+    args_parser.add_option(num_eyes, "Number of eyes", "num-eyes", 'n', "number");
+    args_parser.add_option(max_in_row, "Maximum number of eyes in a row", "max-in-row", 'm', "number");
+    args_parser.add_option(grid_rows, "Number of rows in grid (incompatible with --number)", "grid-rows", 'r', "number");
+    args_parser.add_option(grid_columns, "Number of columns in grid (incompatible with --number)", "grid-cols", 'c', "number");
+    args_parser.parse(argc, argv);
+
+    if (pledge("stdio shared_buffer accept rpath unix cpath wpath fattr thread", nullptr) < 0) {
+        perror("pledge");
+        return 1;
+    }
+
+    auto app = GUI::Application::construct(argc, argv);
+
+    if (pledge("stdio shared_buffer accept rpath cpath wpath thread", nullptr) < 0) {
+        perror("pledge");
+        return 1;
+    }
+
+    if (unveil("/res", "r") < 0) {
+        perror("unveil");
+        return 1;
+    }
+
+    if (unveil(nullptr, nullptr) < 0) {
+        perror("unveil");
+        return 1;
+    }
+
+    if ((grid_rows > 0) ^ (grid_columns > 0)) {
+        warnln("Expected either both or none of 'grid-rows' and 'grid-cols' to be passed.");
+        return 1;
+    }
+
+    int full_rows, extra_columns;
+
+    if (grid_rows > 0) {
+        full_rows = grid_rows;
+        extra_columns = 0;
+        num_eyes = grid_rows * grid_columns;
+        max_in_row = grid_columns;
+    } else {
+        full_rows = num_eyes / max_in_row;
+        extra_columns = num_eyes % max_in_row;
+    }
+
+    auto app_icon = GUI::Icon::default_icon("app-eyes");
+
+    auto window = GUI::Window::construct();
+    window->set_title("Eyes");
+    window->set_icon(app_icon.bitmap_for_size(16));
+    window->resize(75 * (full_rows > 0 ? max_in_row : extra_columns), 100 * (full_rows + (extra_columns > 0 ? 1 : 0)));
+    window->set_has_alpha_channel(true);
+
+    auto& eyes = window->set_main_widget<EyesWidget>(num_eyes, full_rows, extra_columns);
+
+    auto menubar = GUI::MenuBar::construct();
+    auto& app_menu = menubar->add_menu("Eyes Demo");
+    app_menu.add_action(GUI::CommonActions::make_quit_action([&](auto&) { app->quit(); }));
+
+    auto& help_menu = menubar->add_menu("Help");
+    help_menu.add_action(GUI::CommonActions::make_about_action("Eyes Demo", app_icon, window));
+
+    app->set_menubar(move(menubar));
+    window->show();
+    eyes.track_cursor_globally();
+
+    return app->exec();
+}