新增customplot网页版

third/qcustomplotdemo/main.cpp

@@ -3,19 +3,46 @@
 #include "frmmain.h"
 #include <QApplication>
 #include <QTextCodec>
+#include <QFontDatabase>
 #include <QTime>
 #include <QDebug>
 
 int main(int argc, char *argv[])
 {
+#if (QT_VERSION >= QT_VERSION_CHECK(5,0,0))
+    QApplication::setAttribute(Qt::AA_Use96Dpi);
+#endif
 #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);
     QFont font;
+#ifdef Q_OS_WASM
+    QString fontFile = ":/font/DroidSansFallback.ttf";
+    QString fontName = "Droid Sans Fallback";
+
+    //判断图形字体是否存在,不存在则加入
+    QFontDatabase fontDb;
+    if (!fontDb.families().contains(fontName)) {
+        int fontId = fontDb.addApplicationFont(fontFile);
+        QStringList listName = fontDb.applicationFontFamilies(fontId);
+        if (listName.count() == 0) {
+            qDebug() << QString("load %1 error").arg(fontName);
+        }
+    }
+
+    //再次判断是否包含字体名称防止加载失败
+    if (fontDb.families().contains(fontName)) {
+        font = QFont(fontName);
+#if (QT_VERSION >= QT_VERSION_CHECK(4,8,0))
+        font.setHintingPreference(QFont::PreferNoHinting);
+#endif
+    }
+#else
     font.setFamily("Microsoft Yahei");
     font.setPixelSize(13);
+#endif
     a.setFont(font);
 
 #if (QT_VERSION < QT_VERSION_CHECK(5,0,0))