QT QPushButton details

1.QPushButton summary

QAbstractButton Class is the base class of all button control classes , Contains many general button functions .

QPushButton Inherited from QAbstractButton, It can place text 、 Pictures, etc .

It is the most commonly used widget . Press ( Click on ) Button to command the computer to perform certain operations or answer questions . Typical buttons are “ determine ”、“ application ”、“ Cancel ”、“ close ”、“ yes ”、“ no ” and “ help ”.

2. Common methods

QPushButton Class provides 3 Constructors , Namely ：

QPushButton(QWidget *parent = Q_NULLPTR)
QPushButton(const QString &text, QWidget *parent = Q_NULLPTR)
QPushButton(const QIcon &icon, const QString &text, QWidget *parent = Q_NULLPTR)

parent Parameter is used to specify the parent window ;text Parameter is used to set the text to be displayed on the button ;icon Parameter is used to set the icon to be displayed on the button .

Other common methods ：

void setText(const QString &text)	Set the displayed text
void setIcon(const QIcon &icon)	Set icon
void setShortcut(const QKeySequence &key)	Set shortcut key
void setCheckable(bool)	Set whether you can select
void setChecked(bool)	Set whether it is selected or not
void setFont(const QFont &)	Set the font
void setEnabled(bool)	Set whether it can be pressed
void setAutoDefault(bool)	When the user presses Enter On enter , Whether to trigger the event of clicking the button .
void setAutoExclusive(bool)	This property saves whether auto exclusive is enabled

Common signals ：

There are mouse clicks 、 Press down 、 Lift signal .

void clicked(bool checked = false)
void pressed()
void released()

3. Example

3.1 Set text 、 picture .

    QFont font;
    font.setBold(true); // Set in bold 
    ui->pushButton->setFont(font);
    
    QPixmap pixmap("test.png");
    QIcon icon(pixmap);
    ui->pushButton_2->setIcon(icon);

Set the text and picture to appear together

Qt Set up QPushButton Words and pictures _Mr.codeee The blog of -CSDN Blog _qpushbutton Set pictures Method 1 ： ui->pushButton->setIcon(QPixmap("D:/qtTest/untitled/clear.png")); ui->pushButton->setText(" clear "); Method 2 ： ui->pushButton->setStyleSheet("qproperty-icon: url(D:/qtT...https://blog.csdn.net/wzz953200463/article/details/1006371263.2 Set auto exclusive

You can see that there is only one highlight at any time .

 

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

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

3.3 Button three state settings

Buttons have three states , mouse hover 、 Press down 、 Default .

QString a1 = "\
QPushButton#pushButton{\
  border-image: url(:/1.png);\
}\
QPushButton#pushButton:hover{\
    border-image: url(:/2.png);\
}"\
"QPushButton#pushButton:pressed{\
     border-image: url(:/3.png);\
}";


ui->pushButton->setStyleSheet(a1);

3.4 Other style sheet settings

 

Setting fillet , Frame , The font color , Attributes such as font size .

QString a2 = "QPushButton {\
        border: 2px solid #8f8f91;\
        border-radius: 6px;\
        background-color: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1,\
                                          stop: 0 #f6f7fa, stop: 1 #dadbde);\
        font-size: 24px;\
        font-family: Microsoft YaHei;\
        color: #ff0000;\
        min-width: 80px;\
    }";


 ui->pushButton->setStyleSheet(a2);

3.5QSS Style sheet reference

Qt Common style sheets _Mr.codeee The blog of -CSDN Blog 1. Common properties background-color:transparent;// The background color font-family: Microsoft YaHei;// typeface font-size: 24px;// font size color: #000000;// The font color border-image: url();// Background map , Generally not used background-imageborde...https://blog.csdn.net/wzz953200463/article/details/100633382