Qt中根据pc屏幕分辨率按比例修改窗口的大小

#ifndef FITWINDOW_H
#define FITWINDOW_H
#include <QObject>
#include <QWidget>

///////////////////////////////////////////////
/// \brief The FitWindow class,适用于固定尺寸及内部控件大小位置固定的窗口
///
class FitWindow : public QObject
{
Q_OBJECT
public:
FitWindow();
static void resetUI(QWidget* pWidget);
static float getScale();
};

#endif // FITWINDOW_H

#include "fitwindow.h"
#include <QObjectList>
#include <QDesktopWidget>
#include <QApplication>
#include <QMetaProperty>
#include <QPushButton>
FitWindow::FitWindow()
{

}

void FitWindow::resetUI(QWidget *pWidget)
{
if(!pWidget){
return;
}
QDesktopWidget* desktopWidget = QApplication::desktop();
//获取可用桌面大小
QRect deskRect = desktopWidget->availableGeometry();
// 如果分辨率已经在1920及以上，则不需要进行处理
if(deskRect.width() >= 1920){
return;
}
//仅使用x比例，否则窗口会变形
float scale = deskRect.width() / 1920.0;
QObjectList lst = pWidget->children();
QPoint pt(0,0);
for(auto l : lst)
{
auto widget = qobject_cast<QWidget*>(l);
if(widget)
{
pt = widget->pos();

widget->move(QPoint(pt.x() * scale, pt.y() * scale));
widget->resize(widget->width() * scale, widget->height() * scale);

QFont font;
int nIndex = widget->metaObject()->indexOfProperty("font");
auto propertyFont = widget->metaObject()->property(nIndex);

QVariant var = propertyFont.read(widget);
if(var.canConvert(QMetaType::QFont))
{
font = var.value<QFont>();

font.setPointSizeF(font.pointSizeF() * scale);
propertyFont.write(widget,QVariant::fromValue(font));
}

QPixmap pixmap;
nIndex = widget->metaObject()->indexOfProperty("pixmap");
auto pixmapProp = widget->metaObject()->property(nIndex);

var = pixmapProp.read(widget);
if(var.canConvert(QMetaType::QPixmap))
{
pixmap = var.value<QPixmap>();
if(!pixmap.isNull())
{
QSize sizePixmap(pixmap.size().width() * scale, pixmap.size().height() * scale);

pixmap = pixmap.scaled(sizePixmap);
pixmapProp.write(widget,QVariant::fromValue(pixmap));
}
}
}
}

pWidget->resize(pWidget->width() * scale, pWidget->height() * scale);
}

float FitWindow::getScale()
{
QDesktopWidget* desktopWidget = QApplication::desktop();
//获取可用桌面大小
QRect deskRect = desktopWidget->availableGeometry();

return deskRect.width() / 1920.0;
}


使用：
FitWindow::resetUI(pToolsDlg);