重新改进支持Qt4.6-Qt6.1

framelesswidget/framelesswidget.pro

@@ -7,6 +7,7 @@
 QT       += core gui
 
 greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+greaterThan(QT_MAJOR_VERSION, 5): QT += core5compat
 
 TARGET      = framelesswidget
 TEMPLATE    = app

framelesswidget/frmframelesswidget.cpp

@@ -36,7 +36,7 @@ void frmFramelessWidget::initWidget(QWidget *w)
 
     //设置下背景颜色区别看
     QPalette palette = w->palette();
-    palette.setBrush(QPalette::Background, QColor(162, 121, 197));
+    palette.setBrush(QPalette::Window, QColor(162, 121, 197));
     w->setPalette(palette);
 
     QPushButton *btn = new QPushButton(w);

framelesswidget/main.cpp

@@ -9,7 +9,7 @@ int main(int argc, char *argv[])
     QApplication a(argc, argv);
     a.setFont(QFont("Microsoft Yahei", 9));
 
-#if (QT_VERSION <= QT_VERSION_CHECK(5,0,0))
+#if (QT_VERSION < QT_VERSION_CHECK(5,0,0))
 #if _MSC_VER
     QTextCodec *codec = QTextCodec::codecForName("gbk");
 #else