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();
}