QT应用编程: 界面自适应屏幕分辨率

/**************************************************
作者: DS小龙哥
环境: win10 QT5.12.6 VS2017 32位 Release
功能: 自适应工具栏按钮大小
**************************************************/
void AutoZoomButtonSize()
{
  //获取屏幕属性
  QScreen *screen = QGuiApplication::primaryScreen();
  //获取屏幕的分辨率
  int lcd_width = screen->size().width();
  int lcd_height = screen->size().height();
  qDebug() << "当前系统分辨率:" << screen->size();
  //计算横向纵向坐标的伸缩系统
  double factorx = lcd_width / 1920.0;  //1920 是开发电脑界面的分辨率
  double factory = lcd_height / 1080.0;
  //QList<QWidget*> widgets = this->findChildren<QWidget*>();
    //获取界面上所有的按钮
  QList<QToolButton*> buttonList = this->findChildren<QToolButton*>();
  //设置按钮大小
  for (int i = 0; i < buttonList.count(); i++)
  {
    qDebug() << "buttonList:" << buttonList.at(i)->objectName();
    ResetButtonGeometry(buttonList.at(i), factorx, factory);
  }
  //设置工具栏的最大高度
  int ToolFrame_MaxH= lcd_height / 1080.0 * 40;
  qDebug() << "原工具栏的高度:" << ui.ToolFrame->height();
  qDebug() << "现工具栏的高度:" << ToolFrame_MaxH;
  ui.ToolFrame->setMaximumHeight(ToolFrame_MaxH);
  ui.ToolFrame->setMinimumHeight(ToolFrame_MaxH);
}
//重设按钮分辨率
void ResetButtonGeometry(QWidget *widget, double factorx, double factory)
{
  int oldX = widget->x();
  int oldY = widget->y();
  int oldW = widget->width();
  int oldH = widget->height();
  qDebug() << "widget->geometry()1:" << widget->geometry();
  widget->move(oldX*factorx, oldY*factory);
  widget->resize(oldW*factorx, oldH*factory);
  widget->setMaximumSize(oldW*factorx, oldH*factory);
  widget->setMinimumSize(oldW*factorx, oldH*factory);
  qDebug() << "widget->geometry()2:" << widget->geometry();
}