GameShowWidget.cpp

#include "GameShowWidget.h"

GameShowWidget::GameShowWidget(QWidget *parent) : QWidget(parent)
{
    layout = new QVBoxLayout(this);

    gameTopLayout = new QHBoxLayout(this);
    gameScoreNameLabel = new QLabel("得分:", this);
    gameScoreNumLabel = new QLabel("0", this);
    gameStartGameButton = new QPushButton("开始游戏", this);
    gameSettingButton = new QPushButton("游戏设置", this);
    gameHelpButton = new QPushButton("帮助", this);

    // 取消键盘焦点
    gameStartGameButton->setFocusPolicy(Qt::NoFocus);
    gameSettingButton->setFocusPolicy(Qt::NoFocus);
    gameHelpButton->setFocusPolicy(Qt::NoFocus);

    gameTopLayout->addWidget(gameScoreNameLabel);
    gameTopLayout->addWidget(gameScoreNumLabel);
    gameTopLayout->addStretch();
    gameTopLayout->addWidget(gameStartGameButton);
    gameTopLayout->addWidget(gameSettingButton);
    gameTopLayout->addWidget(gameHelpButton);

    gameArea = new SnakeGameWidget(this);
    layout->addLayout(gameTopLayout);
    layout->addWidget(gameArea);

    speed = gameArea->getSpeed();
    speedAdd = speed - 200;

    connect(gameStartGameButton,
            &QPushButton::clicked,
            this,
            [=]()
            {
                QString str = gameStartGameButton->text();
                if (str == "开始游戏")
                {
                    changeGameMode(0);
                }
                else
                {
                    changeGameMode(1);
                }
            });
    connect(gameHelpButton,
            &QPushButton::clicked,
            this,
            [=]()
            {
                QMessageBox::information(this,
                                         "帮助",
                                         "1.单按方向键控制方向\n"
                                         "2.长按方向键变速\n"
                                         "3.窗口的大小是蛇的活动空间大小，适当调整窗口大小\n"
                                         "4.撞墙和撞到自己都会结束游戏\n"
                                         "5.游戏设置可以设置速度");
            });

    connect(gameSettingButton,
            &QPushButton::clicked,
            [=]()
            {
                changeGameMode(1);
                QDialog *dialog = new QDialog(this);
                dialog->setAttribute(Qt::WA_DeleteOnClose);

                QGridLayout *dialogGridLayout = new QGridLayout(dialog);

                QLabel *dialogBottomLabel = new QLabel("正常速度(1-1000):", dialog);
                QLineEdit *dialogBottomLineEdit = new QLineEdit(dialog);
                dialogBottomLineEdit->setText(QString::number(1000 - gameArea->getSpeed()));
                dialogGridLayout->addWidget(dialogBottomLabel, 0, 0);
                dialogGridLayout->addWidget(dialogBottomLineEdit, 0, 1);

                // 按下空格的速度
                QLabel *dialogSpaceLabel = new QLabel("变速速度(1-1000):", dialog);
                QLineEdit *dialogSpaceLineEdit = new QLineEdit(dialog);
                dialogSpaceLineEdit->setText(QString::number(1000 - speedAdd));
                dialogGridLayout->addWidget(dialogSpaceLabel, 1, 0);
                dialogGridLayout->addWidget(dialogSpaceLineEdit, 1, 1);

                QPushButton *dialogEnsureButton = new QPushButton("确定", dialog);
                QPushButton *dialogCancelButton = new QPushButton("取消", dialog);
                dialogGridLayout->addWidget(dialogEnsureButton, 2, 0);
                dialogGridLayout->addWidget(dialogCancelButton, 2, 1);

                connect(dialogEnsureButton,
                        &QPushButton::clicked,
                        [=]()
                        {
                            bool ok1;
                            bool ok2;
                            int speed = dialogBottomLineEdit->text().toInt(&ok1);
                            int speedAdd = dialogSpaceLineEdit->text().toInt(&ok2);
                            if (!ok1)
                            {
                                QMessageBox::warning(this, "警告", "速度请输入数字");
                                return;
                            }
                            if (!ok2)
                            {
                                QMessageBox::warning(this, "警告", "加速速度请输入数字");
                                return;
                            }

                            if (!(speed <= 1000 && speed >= 1))
                            {
                                QMessageBox::warning(this, "警告", "速度范围为1-1000");
                                return;
                            }
                            if (!(speedAdd <= 1000 && speedAdd >= 1))
                            {
                                QMessageBox::warning(this, "警告", "加速速度范围为1-1000");
                                return;
                            }
                            speed = 1000 - speed;
                            speedAdd = 1000 - speedAdd;
                            gameArea->setSpeed(speed);
                            this->speed = speed;
                            this->speedAdd = speedAdd;
                            dialog->close();
                        });

                connect(dialogCancelButton,
                        &QPushButton::clicked,
                        [&]()
                        {
                            dialog->close();
                        });

                dialog->setLayout(dialogGridLayout);
                dialog->exec();
            });

    connect(gameArea,
            &SnakeGameWidget::gameOver,
            this,
            [=]()
            {
                changeGameMode(1);
            });
    connect(gameArea,
            &SnakeGameWidget::getScore,
            [=](int score)
            {
                gameScoreNumLabel->setText(QString::number(score));
            });

    setLayout(layout);
}

void GameShowWidget::changeGameMode(int mode)
{
    // qDebug() << "chageGameMode";
    QString str = gameStartGameButton->text();
    // qDebug() << str;
    if (mode == 0)
    {
        if (str == "开始游戏")
        {
            gameStartGameButton->setText("结束游戏");
            gameArea->setSpeed(speed);
            gameArea->start();
            gameScoreNumLabel->setText("0");
        }
    }
    else if (mode == 1)
    {
        if (str == "结束游戏")
        {
            // qDebug() << gameStartGameButton->text();
            gameStartGameButton->setText("开始游戏");
            gameArea->end();
            gameArea->setSpeed(speed);

            // 吃完全部食物
            QString score = gameScoreNumLabel->text();
            if (score.toInt()
                == gameArea->getWidgetAllBlockWidth() * gameArea->getWidgetAllBlockHeight() - 1)
            {
                QMessageBox::warning(this, "游戏结束", "恭喜你吃完全部食物!", QMessageBox::Ok);
            }
            else
            {
                QMessageBox::warning(this,
                                     "游戏结束",
                                     "得分:" + gameScoreNumLabel->text(),
                                     QMessageBox::Ok);
            }
            gameScoreNumLabel->setText("0");
        }
    }
}

void GameShowWidget::keyPressEvent(QKeyEvent *event)
{
    if (event->key() == Qt::Key_Up)
    {
        gameArea->setSnakeDirection("u");
    }
    else if (event->key() == Qt::Key_Down)
    {
        gameArea->setSnakeDirection("d");
    }
    else if (event->key() == Qt::Key_Left)
    {
        gameArea->setSnakeDirection("l");
    }
    else if (event->key() == Qt::Key_Right)
    {
        gameArea->setSnakeDirection("r");
    }

    // 变速
    if (!event->isAutoRepeat())
    {
        QString direction = gameArea->getSnakeDirection();
        if (direction == "u" && event->key() == Qt::Key_Up)
        {
            gameArea->setSpeed(speedAdd);
        }
        else if (direction == "d" && event->key() == Qt::Key_Down)
        {
            gameArea->setSpeed(speedAdd);
        }
        else if (direction == "l" && event->key() == Qt::Key_Left)
        {
            gameArea->setSpeed(speedAdd);
        }
        else if (direction == "r" && event->key() == Qt::Key_Right)
        {
            gameArea->setSpeed(speedAdd);
        }
    }
}

void GameShowWidget::keyReleaseEvent(QKeyEvent *event)
{
    // 恢复速度
    if (!event->isAutoRepeat())
    {
        QString direction = gameArea->getSnakeDirection();
        if ((direction == "u" || direction == "d") && event->key() == Qt::Key_Up)
        {
            gameArea->setSpeed(speed);
        }
        else if ((direction == "u" || direction == "d") && event->key() == Qt::Key_Down)
        {
            gameArea->setSpeed(speed);
        }
        else if ((direction == "l" || direction == "r") && event->key() == Qt::Key_Left)
        {
            gameArea->setSpeed(speed);
        }
        else if ((direction == "l" || direction == "r") && event->key() == Qt::Key_Right)
        {
            gameArea->setSpeed(speed);
        }
    }
}