gba_main.slint

// Copyright © 2023 Jocelyn Turcotte <turcotte.j@gmail.com>
// SPDX-License-Identifier: MIT

import {
    FocusedPanel,
    InstrumentsFocusScope,
    PatternsFocusScope,
    StepsFocusScope
} from "common.slint";

import {
    GlobalSettings,
    GlobalEngine,
    GlobalUI
} from "globals.slint";

export {
    GlobalSettings,
    GlobalEngine,
    GlobalUI
}

export enum FocusedScreen { main, menu }

export component MainWindow inherits Window {
    out property<FocusedScreen> focused_screen: main;
    out property<FocusedPanel> focused_panel: steps;
    out property<int> focused_menu_row: 0;

    // Menu UI values
    out property<int> frames_per_step: GlobalSettings.song_settings.frames_per_step;
    out property<bool> sync_enabled: GlobalSettings.settings.sync_enabled;

    callback clear_status_text();

    function root_key_pressed(e: KeyEvent) -> EventResult {
        if e.modifiers.shift && e.text == Key.LeftArrow { cycle_focus_panel(false); }
        else if e.modifiers.shift && e.text == Key.RightArrow { cycle_focus_panel(true); }
        else if e.modifiers.shift && e.text == Key.UpArrow { cycle_focus_screen(false); }
        else if e.modifiers.shift && e.text == Key.DownArrow { cycle_focus_screen(true); }
        else if e.text == Key.LeftArrow { GlobalEngine.cycle_pattern_instrument(false); }
        else if e.text == Key.RightArrow { GlobalEngine.cycle_pattern_instrument(true); }
        else if e.text == Key.UpArrow { GlobalUI.select_next_song_pattern(false); }
        else if e.text == Key.DownArrow { GlobalUI.select_next_song_pattern(true); }
        else if e.text == Key.Return && e.modifiers.control { GlobalUI.toggle_play(false); }
        else if e.text == Key.Return { GlobalUI.toggle_play(true); }
        else if e.text == Key.Control {
            GlobalEngine.mute_instruments();
            clear_status_text();
        } else {
            return reject;
        }
        return accept;
    }

    function cycle_focus_panel(forward: bool) {
        if forward {
            if focused_panel == FocusedPanel.patterns {
                focused_panel = FocusedPanel.steps;
                steps_key_handler.focus();
            } else if (focused_panel == FocusedPanel.steps){
                focused_panel = FocusedPanel.instruments;
                instruments_key_handler.focus();
            }
        } else {
            if (focused_panel == FocusedPanel.instruments){
                focused_panel = FocusedPanel.steps;
                steps_key_handler.focus();
            } else if focused_panel == FocusedPanel.steps {
                focused_panel = FocusedPanel.patterns;
                patterns_key_handler.focus();
            }
        }
    }

    function cycle_focus_screen(down: bool) {
        if down {
            if focused_screen == FocusedScreen.menu {
                focused_screen = FocusedScreen.main;
                focused_panel = FocusedPanel.steps;
                steps_key_handler.focus();
            }
        } else {
            if (focused_screen == FocusedScreen.main){
                focused_screen = FocusedScreen.menu;
                // focused_menu_row = 0;
                menu_key_handler.focus();
            }
        }
    }

    function cycle_focus_menu_row(down: bool) {
        if down {
            if focused_menu_row < 3 {
                focused_menu_row += 1;
            }
        } else {
            if focused_menu_row > 0 {
                focused_menu_row -= 1;
            }
        }
    }

    function cycle_frames_per_step(forward: bool) {
        if forward {
            if frames_per_step < 99 {
                frames_per_step += 1;
            }
        } else {
            if frames_per_step > 1 {
                frames_per_step -= 1;
            }
        }
        GlobalSettings.song_settings.frames_per_step = frames_per_step;
        GlobalSettings.song_settings_changed(GlobalSettings.song_settings);
    }

    function toggle_sync() {
        sync_enabled = !sync_enabled;
        // FIXME: Implement or remove
        GlobalSettings.settings.sync_enabled = sync_enabled;
        GlobalSettings.settings_changed(GlobalSettings.settings);
    }

    forward_focus: steps_key_handler;
    menu_key_handler := FocusScope {
        key_pressed(e) => {
            if e.text == Key.UpArrow && !e.modifiers.shift { cycle_focus_menu_row(false); }
            else if e.text == Key.DownArrow && !e.modifiers.shift { cycle_focus_menu_row(true); }
            else if focused_menu_row == 2 && e.text == Key.LeftArrow && GlobalUI.x_pressed { cycle_frames_per_step(false); }
            else if focused_menu_row == 2 && e.text == Key.RightArrow && GlobalUI.x_pressed { cycle_frames_per_step(true); }
            else if focused_menu_row == 3 && e.text == Key.LeftArrow && GlobalUI.x_pressed { toggle_sync(); }
            else if focused_menu_row == 3 && e.text == Key.RightArrow && GlobalUI.x_pressed { toggle_sync(); }
            else if e.text == "x" {
                if focused_menu_row == 0 {
                    GlobalEngine.save_project();
                } else if focused_menu_row == 1 {
                    GlobalEngine.clear_song_and_load_default_instruments();
                }
            }
            else {
                GlobalUI.update_press_states(e);
                return root_key_pressed(e);
            }
            GlobalUI.update_press_states(e);
            return accept;
        }
        key_released(e) => {
            GlobalUI.update_release_states(e);
            return accept;
        }
    }
    patterns_key_handler := PatternsFocusScope {
        root_key_pressed(e) => { root.root_key_pressed(e); }
    }
    steps_key_handler := StepsFocusScope {
        root_key_pressed(e) => { root.root_key_pressed(e); }
    }
    instruments_key_handler := InstrumentsFocusScope {
        root_key_pressed(e) => { root.root_key_pressed(e); }
    }
}