CSSTUDIO-2939 Add boolean preference option 'org.csstudio.display.builder.model/enable_svg_rendering_resolution_factor' to configure whether the "SVG Rendering Resolution Factor" widget property is available in the Picture and Symbol widgets.

Author: abrahamwolk

app/display/model/src/main/java/org/csstudio/display/builder/model/Preferences.java

@@ -37,6 +37,9 @@ public class Preferences
     @Preference(name="macros") private static String macro_spec;
     /** Preference setting */
     @Preference public static boolean enable_saved_on_comments;
+    /** Preference setting */
+    @Preference public static boolean enable_svg_rendering_resolution_factor;
+
     private static Macros macros;
 
     static

app/display/model/src/main/java/org/csstudio/display/builder/model/widgets/PictureWidget.java

@@ -15,6 +15,7 @@
 import java.util.List;
 
 import org.csstudio.display.builder.model.Messages;
+import org.csstudio.display.builder.model.Preferences;
 import org.csstudio.display.builder.model.Version;
 import org.csstudio.display.builder.model.Widget;
 import org.csstudio.display.builder.model.WidgetCategory;
@@ -134,7 +135,10 @@ protected void defineProperties(final List<WidgetProperty<?>> properties)
         properties.add(stretch_image = propStretch.createProperty(this, false));
         properties.add(rotation = propRotation.createProperty(this, 0.0));
         properties.add(opacity = propOpacity.createProperty(this, 1.0));
-        properties.add(svgRenderingResolutionFactor = propSVGRenderingResolutionFactor.createProperty(this, 1.0));
+        svgRenderingResolutionFactor = propSVGRenderingResolutionFactor.createProperty(this, 1.0);
+        if (Preferences.enable_svg_rendering_resolution_factor) {
+            properties.add(svgRenderingResolutionFactor);
+        }
     }
 
     /** @return 'rotation' property */

app/display/model/src/main/java/org/csstudio/display/builder/model/widgets/SymbolWidget.java

@@ -25,6 +25,7 @@
 
 import org.csstudio.display.builder.model.ArrayWidgetProperty;
 import org.csstudio.display.builder.model.Messages;
+import org.csstudio.display.builder.model.Preferences;
 import org.csstudio.display.builder.model.Version;
 import org.csstudio.display.builder.model.Widget;
 import org.csstudio.display.builder.model.WidgetCategory;
@@ -252,7 +253,12 @@ protected void defineProperties ( final List<WidgetProperty<?>> properties ) {
         properties.add(enabled        = propEnabled.createProperty(this, true));
         properties.add(preserve_ratio = propPreserveRatio.createProperty(this, true));
         properties.add(fallbackSymbol = propFallbackSymbol.createProperty(this, DEFAULT_SYMBOL));
-        properties.add(svgRenderingResolutionFactor = propSVGRenderingResolutionFactor.createProperty(this, 1.0));
+
+        svgRenderingResolutionFactor = propSVGRenderingResolutionFactor.createProperty(this, 1.0);
+        if (Preferences.enable_svg_rendering_resolution_factor) {
+            properties.add(svgRenderingResolutionFactor);
+        }
+
         WidgetColor alarmInvalidColor =
                 WidgetColorService.getColor(NamedWidgetColors.ALARM_INVALID);
         WidgetColor defaultDisconnectedOverlayColor =

app/display/model/src/main/resources/display_model_preferences.properties

@@ -88,3 +88,10 @@ skip_defaults=true
 
 # Add a comment containing the date, time, and username when saving an OPI in the Display Editor.
 enable_saved_on_comments=true
+
+# Enable the "SVG Rendering Resolution Factor" widget property to the Symbol and Picture widgets.
+# This functionality can enable a sharper image when zooming in, at the expense of a quadratic
+# increase in memory consumption. E.g., by setting the SVG rendering resolution factor to 2.0, an
+# SVG can be rendered at twice the width and twice the height, but the memory required to
+# represent the image grows by a factor of four.
+org.csstudio.display.builder.model/enable_svg_rendering_resolution_factor=false