1 标准对话框

image.png

  1. // 消息框
  2. MainWindow::MainWindow(QWidget *parent)
  3.     : QMainWindow(parent)
  4.     , ui(new Ui::MainWindow)
  5. {
  6.     ui->setupUi(this);
  7.     connect(ui->actionNew,&QAction::triggered,this,[=]()
  8.     {
  9.         //QMessageBox::critical(this,"错误","critical");
  10.         //QMessageBox::information(this,"信息","info");
  11. //        if(QMessageBox::question(this,"问题","question",QMessageBox::Save|QMessageBox::Cancel,
  12. //               QMessageBox::Cancel) == QMessageBox::Save)
  13. //        {
  14. //            qDebug() << "点击的是保存";
  15. //        }
  16. //        else
  17. //        {
  18. //            qDebug() << "点击的是取消";
  19. //        }
  20.         QMessageBox::warning(this,"警告","warning");
  21.     });
  22. }
  24. // 颜色对话框 与 文件对话框
  25. MainWindow::MainWindow(QWidget *parent)
  26.     : QMainWindow(parent)
  27.     , ui(new Ui::MainWindow)
  28. {
  29.     ui->setupUi(this);
  30.     connect(ui->actionNew,&QAction::triggered,this,[=]()
  31.     {
  32.         // 选择颜色对话框
  33.         //QColor cr = QColorDialog::getColor(QColor(255,0,0));
  34.         //qDebug() << cr.red() << cr.green() << cr.blue();    // 170 85 255
  35.         // 选择文件对话框
  36.         QString path = QFileDialog::getOpenFileName(this,"请选择你打开的文件","C:/Users/16481/Desktop","(*.txt *.jpg)");
  37.         qDebug() << path;   // "C:/Users/16481/Desktop/新建位图图像.jpg"
  38.     });
  39. }

2 自定义对话框

  1. MainWindow::MainWindow(QWidget *parent)
  2.     : QMainWindow(parent)
  3.     , ui(new Ui::MainWindow)
  4. {
  5.     ui->setupUi(this);
  6.     //点击新建菜单项弹出对话框
  7.     connect(ui->actionNew,&QAction::triggered,this,[=]()
  8.     {
  9. //        QDialog dlg(this);
  10. //        dlg.resize(200,100);
  11. //        dlg.exec(); //以模态显示对话框
  12.         //QDialog dlg2(this);     //非模态显示对话框,要创建到堆上
  13.         QDialog* dlg2 = new QDialog(this);
  14.         dlg2->resize(200,100);
  15.         dlg2->show();
  16.         dlg2->setAttribute(Qt::WA_DeleteOnClose);   //设置窗口属性:关闭窗口后销毁对象
  17.     });
  18. }

3 自定义消息框

  1. from PySide2.QtWidgets import QMessageBox, QApplication, QWidget, QPushButton, QAbstractButton
  2. from PySide2.QtCore import QTimer
  3. import sys
  5. class TimeMsgBox(QMessageBox):
  6.     def __init__(self, title: str, text: str, timeout=5):
  7.         super().__init__()
  8.         self.timeout = timeout
  9.         # self.setIcon(QMessageBox.Warning)  # 设置图标后会有提示音
  10.         self.setWindowTitle(title)
  11.         self.setText(text)
  13.         self.btn_accept = QPushButton(f"确 定 ({self.timeout})")
  14.         self.btn_reject = QPushButton("取 消")
  15.         self.addButton(self.btn_accept, QMessageBox.ButtonRole.AcceptRole)
  16.         self.addButton(self.btn_reject, QMessageBox.ButtonRole.RejectRole)
  18.         self.timer = QTimer(self)
  19.         self.timer.timeout.connect(self.on_timer_timeout)
  20.         self.timer.start(1000)
  22.     def on_timer_timeout(self):
  23.         self.timeout -= 1
  24.         self.btn_accept.setText(f"确 定 ({self.timeout})")
  25.         if self.timeout <= 0:
  26.             self.btn_accept.click()
  28. class Example(QWidget):
  29.     def __init__(self):
  30.         super().__init__()
  31.         btn = QPushButton("Button", self)
  32.         btn.resize(btn.sizeHint())
  33.         btn.move(50, 50)
  34.         self.setWindowTitle("Example")
  35.         btn.clicked.connect(self.warning)
  37.     def warning(self):
  38.         msgBox = TimeMsgBox("天星科技", "定时关机时间到, 是否关机?")
  39.         ret = msgBox.exec_()
  40.         if msgBox.clickedButton() == msgBox.btn_accept:
  41.             print("1")
  42.         else:
  43.             print("2")
  45. if __name__ == '__main__':
  46.     app = QApplication(sys.argv)
  48.     ex = Example()
  49.     ex.show()
  51.     sys.exit(app.exec_())