Add dpi adjusted font sizes

src/QGCPalette.cc

@@ -25,10 +25,13 @@
 ///     @author Don Gagne <don@thegagnes.com>
 
 #include "QGCPalette.h"
+#include "ScreenTools.h"
 
 #include <QApplication>
 #include <QPalette>
 
+const qreal QGCPalette::_defaultFontPointSize = 12;
+
 QList<QGCPalette*>   QGCPalette::_paletteObjects;
 
 QGCPalette::Theme QGCPalette::_theme = QGCPalette::Dark;
@@ -130,3 +133,8 @@ void QGCPalette::_themeChanged(void)
 {
     emit paletteChanged();
 }
+
+qreal QGCPalette::dpiAdjustedDefaultFontPointSize(void)
+{
+    return ScreenTools::dpiAdjustedPointSize_s(_defaultFontPointSize);
+}

src/QGCPalette.h

@@ -82,7 +82,11 @@ class QGCPalette : public QObject
     
     // Text color for TextFields
     Q_PROPERTY(QColor textFieldText READ textFieldText NOTIFY paletteChanged)
-        
+    
+    Q_PROPERTY(qreal defaultFontPointSize MEMBER _defaultFontPointSize CONSTANT)
+    
+    Q_PROPERTY(qreal dpiAdjustedDefaultFontPointSize READ dpiAdjustedDefaultFontPointSize CONSTANT)
+    
 public:
     enum ColorGroup {
         Disabled = 0,
@@ -120,6 +124,8 @@ public:
     static Theme globalTheme(void) { return _theme; }
     static void setGlobalTheme(Theme newTheme);
     
+    qreal dpiAdjustedDefaultFontPointSize(void);
+    
 signals:
     void paletteChanged(void);
     
@@ -149,6 +155,8 @@ private:
     static QColor _textField[_cThemes][_cColorGroups];
     static QColor _textFieldText[_cThemes][_cColorGroups];
     
+    static const qreal _defaultFontPointSize;
+    
     void _themeChanged(void);
     
     static QList<QGCPalette*>   _paletteObjects;    ///< List of all active QGCPalette objects