重新改进支持Qt4.6-Qt6.1

styledemo/frmmain.cpp

@@ -4,7 +4,6 @@
 #include "qfile.h"
 #include "qtextstream.h"
 #include "qtranslator.h"
-#include "qdesktopwidget.h"
 #include "qdebug.h"
 
 frmMain::frmMain(QWidget *parent) : QMainWindow(parent), ui(new Ui::frmMain)
@@ -38,7 +37,7 @@ void frmMain::initForm()
 void frmMain::initTableWidget()
 {
     //设置列数和列宽
-    int width = qApp->desktop()->availableGeometry().width() - 120;
+    int width = 1920;
     ui->tableWidget->setColumnCount(5);
     ui->tableWidget->setColumnWidth(0, width * 0.06);
     ui->tableWidget->setColumnWidth(1, width * 0.10);

styledemo/head.h

@@ -1,7 +1,7 @@
 #include <QtCore>
 #include <QtGui>
 #include <QtNetwork>
-#if (QT_VERSION > QT_VERSION_CHECK(5,0,0))
+#if (QT_VERSION >= QT_VERSION_CHECK(5,0,0))
 #include <QtWidgets>
 #endif
 

styledemo/main.cpp

@@ -2,10 +2,12 @@
 #include "frmmain.h"
 #include <QApplication>
 #include <QTextCodec>
-#include <QDesktopWidget>
 
 int main(int argc, char *argv[])
 {
+#if (QT_VERSION >= QT_VERSION_CHECK(6,0,0))
+    QGuiApplication::setHighDpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy::Floor);
+#endif
     QApplication a(argc, argv);
     a.setFont(QFont("Microsoft Yahei", 9));
 
@@ -25,14 +27,7 @@ int main(int argc, char *argv[])
 
     frmMain w;
     w.setWindowTitle("样式表示例 (QQ: 517216493 WX: feiyangqingyun)");
-    w.show();
-
-    //居中显示窗体
-    QDesktopWidget deskWidget;
-    int deskWidth = deskWidget.availableGeometry().width();
-    int deskHeight = deskWidget.availableGeometry().height();
-    QPoint movePoint(deskWidth / 2 - w.width() / 2, deskHeight / 2 - w.height() / 2);
-    w.move(movePoint);
+    w.show();    
 
     return a.exec();
 }

styledemo/styledemo.pro

@@ -4,9 +4,9 @@
 #
 #-------------------------------------------------
 
-QT       += core gui network
-
+QT += core gui
 greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+greaterThan(QT_MAJOR_VERSION, 5): QT += core5compat
 
 TARGET      = styledemo
 TEMPLATE    = app