更新代码

widget/screenwidget/frmscreenwidget.cpp

@@ -10,6 +10,7 @@ frmScreenWidget::frmScreenWidget(QWidget *parent) : QWidget(parent), ui(new Ui::
 frmScreenWidget::~frmScreenWidget()
 {
     delete ui;
+    exit(0);
 }
 
 void frmScreenWidget::on_pushButton_clicked()

widget/screenwidget/main.cpp

@@ -6,6 +6,10 @@
 
 int main(int argc, char *argv[])
 {
+#if (QT_VERSION >= QT_VERSION_CHECK(5,14,0))
+    //设置高分屏缩放舍入策略
+    QApplication::setHighDpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy::Floor);
+#endif
     QApplication a(argc, argv);
     a.setFont(QFont("Microsoft Yahei", 9));
 

widget/screenwidget/screenwidget.cpp

@@ -8,6 +8,7 @@
 #include "qevent.h"
 #include "qdatetime.h"
 #include "qstringlist.h"
+#include "qdebug.h"
 
 #if (QT_VERSION >= QT_VERSION_CHECK(5,0,0))
 #include "qscreen.h"
@@ -135,7 +136,6 @@ void Screen::cmpPoint(QPoint &leftTop, QPoint &rightDown)
 
     if (l.x() <= r.x()) {
         if (l.y() <= r.y()) {
-            ;
         } else {
             leftTop.setY(r.y());
             rightDown.setY(l.y());