void BoxGroup::keyPressEvent(QKeyEvent *event)
{
switch (event->key())
{
case Qt::Key_Down :
moveBy(0, 20);
if (isColliding()) {
moveBy(0, -20);
// 将小方块从方块组中移除到场景中
clearBoxGroup();
// 需要显示新的方块
emit needNewBox();
}
break;
case Qt::Key_Left :
moveBy(-20, 0);
if (isColliding())
moveBy(20, 0);
break;
case Qt::Key_Right :
moveBy(20, 0);
if (isColliding())
moveBy(-20, 0);
break;
case Qt::Key_Up :
rotate(90);
if(isColliding())
rotate(-90);
break;
// 空格键实现坠落
case Qt::Key_Space :
moveBy(0, 20);
while (!isColliding()) {
moveBy(0, 20);
}
moveBy(0, -20);
clearBoxGroup();
emit needNewBox();
break;
}
}
GameView::GameView()
{
scene = new QGraphicsScene;
snake = new Snake;
addItems();
setScene(scene);
score = 0;
connect(this,SIGNAL(keyPress(QKeyEvent*)),
snake,SLOT(keyPressEvent(QKeyEvent*)));
connect(snake,SIGNAL(addandDelBox(OneBox*,OneBox*)),
this,SLOT(changedItem(OneBox*,OneBox*)));
connect(snake,SIGNAL(needNewBox()),this,SLOT(needNewBox()));
connect(snake,SIGNAL(gameEnd()),this,SLOT(endGame()));
//添加边界线，进行碰撞检测
QGraphicsLineItem *topLineItem =new QGraphicsLineItem(-20,-20,820,-20);
QGraphicsLineItem *leftLineItem = new QGraphicsLineItem(-20,-20,-20,620);
QGraphicsLineItem *buttonLineItem = new QGraphicsLineItem(-20,620,820,620);
QGraphicsLineItem *rightLineItem = new QGraphicsLineItem(820,-20,820,620);
scene->addItem(topLineItem);
scene->addItem(leftLineItem);
scene->addItem(buttonLineItem);
scene->addItem(rightLineItem);
//设置窗口大小，不可改变
setMinimumSize(802, 602);
setMaximumSize(802, 602);
scene->setSceneRect(0,0,800,600);
// setSceneRect(0,0,800,600);
// setSceneRect(0,0,800,600);
setBackgroundBrush(Qt::black);
needNewBox();
}
