FIX issue #116 "Most of the examples fail to launch with MSVC2019 + Qt5 environment" (missing local variable declaration!) + changed a bit the font lookup code in JKQTMathText to work more in line with typical system configurations

examples/jkqtmathtext_test/testform.cpp

@@ -39,10 +39,18 @@ TestForm::TestForm(QWidget *parent) :
                             "  text: & abc123+d/e\\\\\n"
                             "  textit: & \\textit{abc123+d/e}\\\\\n"
                             "  textbf: & \\textbf{abc123+d/e}\\\\\n"
+                            "  textsf: & \\textsf{abc123+d/e}\\\\\n"
+                            "  textrm: & \\textrm{abc123+d/e}\\\\\n"
+                            "  texttt: & \\texttt{abc123+d/e}\\\\\n"
+                            "  textcal: & \\textcal{abc123+d/e}\\\\\n"
+                            "  textfrak: & \\textfrak{abc123+d/e}\\\\\n"
                             "  math: & $abc123+d/e$\\\\\n"
                             "  mathrm: & $\\mathrm{abc123+d/e}$\\\\\n"
+                            "  mathsf: & $\\mathsf{abc123+d/e}$\\\\\n"
+                            "  mathtt: & $\\mathtt{abc123+d/e}$\\\\\n"
                             "  mathit: & $\\mathit{abc123+d/e}$\\\\\n"
                             "  mathbf: & $\\mathbf{abc123+d/e}$\\\\\n"
+                            "  mathcal: & $\\mathcal{abc123+d/e}$\n"
                             "  mathfrak: & $\\mathfrak{abc123+d/e}$\n"
                             "\\end{matrix}");
     ui->cmbTestset->addItem("text: umlaute", umla);

lib/jkqtmathtext/jkqtmathtexttools.cpp

@@ -432,14 +432,14 @@ JKQTMathTextFontSpecifier JKQTMathTextFontSpecifier::getAppFontFamilies()
             }
         }
         if (!set) {
-            if (f.styleHint()==QFont::SansSerif) {
-                const JKQTMathTextFontSpecifier fira=getFIRAFamilies();
-                if (fira.hasFallbackSymbolFontName()) fontSpec.m_fallbackSymbolFont=fira.fallbackSymbolsFontName();
-                if (fira.hasMathFontName()) fontSpec.m_mathFontName=fira.mathFontName();
-            } else {
+            if (f.styleHint()==QFont::Serif) {
                 const JKQTMathTextFontSpecifier xits=getXITSFamilies();
                 if (xits.hasFallbackSymbolFontName()) fontSpec.m_fallbackSymbolFont=xits.fallbackSymbolsFontName();
                 if (xits.hasMathFontName()) fontSpec.m_mathFontName=xits.mathFontName();
+            } else {
+                const JKQTMathTextFontSpecifier fira=getFIRAFamilies();
+                if (fira.hasFallbackSymbolFontName()) fontSpec.m_fallbackSymbolFont=fira.fallbackSymbolsFontName();
+                if (fira.hasMathFontName()) fontSpec.m_mathFontName=fira.mathFontName();
             }
         }
         return fontSpec;
@@ -450,14 +450,15 @@ JKQTMathTextFontSpecifier JKQTMathTextFontSpecifier::getAppFontFamilies()
 JKQTMathTextFontSpecifier JKQTMathTextFontSpecifier::getAppFontSFFamilies()
 {
     static JKQTMathTextFontSpecifier fontSpec=[]() -> JKQTMathTextFontSpecifier {
+        JKQTMathTextFontSpecifier fontSpec;
         const QFont f=QGuiApplication::font().family();
         QFont testFnt;
-        if (f.styleHint()==QFont::SansSerif) {
-            testFnt.setStyleHint(QFont::StyleHint::Serif);
-            fontSpec.m_fontName=fontSpec.m_mathFontName=testFnt.defaultFamily();
-        } else {
+        if (f.styleHint()==QFont::Serif) {
             testFnt.setStyleHint(QFont::StyleHint::SansSerif);
-            fontSpec.m_fontName=fontSpec.m_mathFontName=testFnt.defaultFamily();
+            fontSpec.m_fontName=fontSpec.m_mathFontName=testFnt.defaultFamily();;
+        } else {
+            testFnt.setStyleHint(QFont::StyleHint::Serif);
+            fontSpec.m_fontName=fontSpec.m_mathFontName=testFnt.defaultFamily();;
         }
         return fontSpec;
     }();

lib/jkqtmathtext/jkqtmathtexttools.h

@@ -147,7 +147,7 @@ struct JKQTMATHTEXT_LIB_EXPORT JKQTMathTextFontSpecifier {
      *  font with symbols is "Segoe UI Symbol" ...
      */
     static JKQTMathTextFontSpecifier getAppFontFamilies();
-    /** \brief initialize with the default app font-families for "serif" text and math and tries to find a matching fallback-font. This may be used to initialize sans-serif-fonts
+    /** \brief initialize with the default app font-families for "sans-serif" text and math and tries to find a matching fallback-font. This may be used to initialize sans-serif-fonts
      *
      *  This method encodes some pre-coded knowledge of suitable combinations of fonts for different systems.
      *