Qt第三课 ----------按钮的控件属性

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Push Button

前面我们简单的使用了QPushbutton这个类, 大致知道了 QAbstractButton
这个类是其他按钮的父类

text

text();获取文本
setText();设置文本

Widget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget)
{ui->setupUi(this);QPushButton* btntext = new QPushButton(this);btntext->setText("我很厉害");qDebug()<< btntext->text();
}

如图:

icon

前面我们在介绍windowIcon设置窗口图标的时候,就介绍icon是一个类,一个图片,
如果要使用这个, 需要把资源放入到qrc文件中,

Widget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget)
{ui->setupUi(this);QPushButton* btntext = new QPushButton(this);btntext->setText("我很厉害");qDebug()<< btntext->text();btntext->setIcon(QIcon(":/new/prefix1/cat.png"));}

如图:

iconsize

Iconsize(); 返回一个Qsize类型的对象,
seticonsize(QSize& size); 设置图标的大小;

Widget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget)
{ui->setupUi(this);QPushButton* btntext = new QPushButton(this);QRect rect(10,20, 1000,1000);btntext->setGeometry(rect);btntext->setText("我很厉害");qDebug()<< btntext->text();btntext->setIcon(QIcon(":/new/prefix1/cat.png"));qDebug()<<btntext->iconSize();btntext->setIconSize(QSize(50,50));}

shortCut

给按钮添加快捷键
前面我们设置过使用鼠标点击按钮移动按钮,这里我们就使用快捷键来移动一个按钮
使⽤ setShortcut 给按钮设置快捷键. 参数是⼀个 QKeySequence 对象. 表⽰⼀个按键序列. ⽀
持组合键 (ctrl + c 这种).
下面使用Qt Designer来连接信号和槽， 没有使用connect

Widget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget)
{ui->setupUi(this);ui->pushButton_5->setText("");ui->pushButton_5->setIconSize(QSize(50,50));ui->pushButton_5->setIcon(QIcon(":/new/prefix1/cat.png"));ui->pushButton->setIcon(QIcon(":/new/prefix1/left.png"));ui->pushButton_2->setIcon(QIcon(":/new/prefix1/top.png"));ui->pushButton_3->setIcon(QIcon(":/new/prefix1/right.png"));ui->pushButton_4->setIcon(QIcon(":/new/prefix1/down.png"));ui->pushButton_5->setGeometry(10,10,100,100);ui->pushButton->setShortcut(QKeySequence("a"));ui->pushButton_2->setShortcut(QKeySequence("w"));ui->pushButton_3->setShortcut(QKeySequence("d"));ui->pushButton_4->setShortcut(QKeySequence("s"));
}Widget::~Widget()
{delete ui;
}void Widget::on_pushButton_clicked()
{QRect rect = ui->pushButton_5->geometry();ui->pushButton_5->setGeometry(rect.x()-0.1, rect.y(), rect.width(), rect.height());
}void Widget::on_pushButton_2_clicked()
{QRect rect = ui->pushButton_5->geometry();ui->pushButton_5->setGeometry(rect.x(), rect.y()-0.1, rect.width(), rect.height());
}void Widget::on_pushButton_3_clicked()
{QRect rect = ui->pushButton_5->geometry();ui->pushButton_5->setGeometry(rect.x()+1, rect.y(), rect.width(), rect.height());
}void Widget::on_pushButton_4_clicked()
{QRect rect = ui->pushButton_5->geometry();ui->pushButton_5->setGeometry(rect.x(), rect.y()+1, rect.width(), rect.height());
}

如图：

这样写出来的效果，按住按键会连续触发，使用鼠标就不能连发，
上面的设置按键的方式，按照上面的代码进行设置，如果设置错了，是不会报错， 如果是通过枚举的来设置快捷键就可以避免这个问题

ui->pushButton->setShortcut(QKeySequence(Qt::Key_A));
ui->pushButton_2->setShortcut(QKeySequence(Qt::Key_W));
ui->pushButton_3->setShortcut(QKeySequence(Qt::Key_D));
ui->pushButton_4->setShortcut(QKeySequence(Qt::Key_S));

设置错了就会报错

autoRepeat

设置鼠标的连发功能

在上面的代码上我们设置一下鼠标的连发

        ui->pushButton->setAutoRepeat(true);ui->pushButton_2->setAutoRepeat(true);ui->pushButton_3->setAutoRepeat(true);ui->pushButton_4->setAutoRepeat(true);

redioButton

这是一个单选的按钮
一般常用的属性如下：

checkable

一般情况下，创建的radiobutton默认是可以不选中的， 使用这个只能让被选中，或者还是通过鼠标去点击选中

Widget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget)
{ui->setupUi(this);QLabel* label = new QLabel(this);label->setText("选择你的性别:");QRadioButton* radiobuttonOne = new QRadioButton("男",this);radiobuttonOne->setChecked(true);radiobuttonOne->setGeometry(radiobuttonOne->geometry().x(),radiobuttonOne->geometry().y()+50,radiobuttonOne->geometry().width(),radiobuttonOne->geometry().height());QRadioButton* radiobuttonTwo = new QRadioButton("女",this);radiobuttonTwo->setGeometry(radiobuttonOne->geometry().x(),radiobuttonOne->geometry().y()+50,radiobuttonOne->geometry().width(),radiobuttonOne->geometry().height());QRadioButton* radiobuttonThree = new QRadioButton("人妖",this);radiobuttonThree->setGeometry(radiobuttonTwo->geometry().x(),radiobuttonTwo->geometry().y()+50,radiobuttonTwo->geometry().width(),radiobuttonTwo->geometry().height());auto funtion = [=](){connect(radiobuttonOne, &QRadioButton::clicked, this, [=](){radiobuttonTwo->setChecked(false);radiobuttonThree->setChecked(false);qDebug() << "点击成功";});connect(radiobuttonTwo, &QRadioButton::clicked, this, [=](){radiobuttonOne->setChecked(false);radiobuttonThree->setChecked(false);qDebug() << "点击成功";});connect(radiobuttonThree, &QRadioButton::clicked, this, [=](){radiobuttonTwo->setChecked(false);radiobuttonOne->setChecked(false);qDebug() << "点击成功";});};funtion();}

如图：

如果要实现禁用按钮可以使用enable这个属性达到禁用

checked

Widget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget)
{ui->setupUi(this);QLabel* label = new QLabel(this);label->setText("选择你的性别:");QRadioButton* radiobuttonOne = new QRadioButton("男",this);radiobuttonOne->setChecked(true);radiobuttonOne->setGeometry(radiobuttonOne->geometry().x(),radiobuttonOne->geometry().y()+50,radiobuttonOne->geometry().width(),radiobuttonOne->geometry().height());QRadioButton* radiobuttonTwo = new QRadioButton("女",this);radiobuttonTwo->setGeometry(radiobuttonOne->geometry().x(),radiobuttonOne->geometry().y()+50,radiobuttonOne->geometry().width(),radiobuttonOne->geometry().height());QRadioButton* radiobuttonThree = new QRadioButton("人妖",this);radiobuttonThree->setGeometry(radiobuttonTwo->geometry().x(),radiobuttonTwo->geometry().y()+50,radiobuttonTwo->geometry().width(),radiobuttonTwo->geometry().height());auto funtion = [=](){connect(radiobuttonOne, &QRadioButton::clicked, this, [=](bool elemeset){qDebug() << "radiobuttonOne:"<<elemeset;qDebug() << "点击成功";});connect(radiobuttonTwo, &QRadioButton::clicked, this, [=](bool elemeset){qDebug() << "radiobuttonTwo:"<<elemeset;qDebug() << "点击成功";});connect(radiobuttonThree, &QRadioButton::clicked, this, [=](bool elemeset){qDebug() << "radiobuttonThree:"<<elemeset;qDebug() << "点击成功";});};funtion();}

如图：

这是使用的checked是含有参数的，获取到当前点击按钮是否被选中

autoExclusive

前面我们看到过很多多选按钮，这个就是用来控制是否可以多选的

Widget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget)
{ui->setupUi(this);QLabel* label = new QLabel(this);label->setText("选择你的性别:");//是否多选QRadioButton* Manybutton= new  QRadioButton("多选",this);Manybutton->move(150,0);QRadioButton* radiobuttonOne = new QRadioButton("男",this);radiobuttonOne->setChecked(true);radiobuttonOne->setGeometry(radiobuttonOne->geometry().x(),radiobuttonOne->geometry().y()+50,radiobuttonOne->geometry().width(),radiobuttonOne->geometry().height());QRadioButton* radiobuttonTwo = new QRadioButton("女",this);radiobuttonTwo->setGeometry(radiobuttonOne->geometry().x(),radiobuttonOne->geometry().y()+50,radiobuttonOne->geometry().width(),radiobuttonOne->geometry().height());QRadioButton* radiobuttonThree = new QRadioButton("人妖",this);radiobuttonThree->setGeometry(radiobuttonTwo->geometry().x(),radiobuttonTwo->geometry().y()+50,radiobuttonTwo->geometry().width(),radiobuttonTwo->geometry().height());auto funtion = [=](){connect(radiobuttonOne, &QRadioButton::clicked, this, [=](bool elemeset){qDebug() << "radiobuttonOne:"<<elemeset;qDebug() << "点击成功";});connect(radiobuttonTwo, &QRadioButton::clicked, this, [=](bool elemeset){qDebug() << "radiobuttonTwo:"<<elemeset;qDebug() << "点击成功";});connect(radiobuttonThree, &QRadioButton::clicked, this, [=](bool elemeset){qDebug() << "radiobuttonThree:"<<elemeset;qDebug() << "点击成功";});connect(Manybutton, &QRadioButton::clicked, this, [=](bool multi){if(multi== true){radiobuttonThree->setAutoExclusive(false);radiobuttonOne->setAutoExclusive(false);radiobuttonTwo->setAutoExclusive(false);qDebug()<< "多选成功";}else{radiobuttonThree->setAutoExclusive(true);radiobuttonOne->setAutoExclusive(true);radiobuttonTwo->setAutoExclusive(true);qDebug()<< "取消多选";}});};funtion();}

如图:

一般这个属性在radiobutton使用的话不怎么建议, 一般是加入到一个组里面去

check box

这个多选按钮的属性跟单选按钮是一样的，支持checked 、checkable，等属性，下面就简单的写一下

Widget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget)
{ui->setupUi(this);//一QCheckBox* checkbokOne = new QCheckBox("吃饭", this);checkbokOne->move(0,20);connect(checkbokOne, &QCheckBox::clicked, this, [=](bool elemest){qDebug()<< "one:" << elemest;});//二QCheckBox* checkbokTwo = new QCheckBox("睡觉", this);checkbokTwo->move(0,40);connect(checkbokTwo, &QCheckBox::clicked, this, [=](bool elemest){qDebug()<< "two:" << elemest;});//三QCheckBox* checkbokThree = new QCheckBox("打豆豆", this);checkbokThree->move(0,60);connect(checkbokThree, &QCheckBox::clicked, this, [=](bool elemest){qDebug()<< "Three:" << elemest;});
}

如图