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Add log scaling property to Meter widget #3764

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Merged
shroffk merged 8 commits into from
Apr 14, 2026
Merged

Add log scaling property to Meter widget #3764

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12a5a08
Add log scaling property to Meter widget
rjwills28 Apr 3, 2026
8246001
Update log scale property label to 'Logarithmic Scale'
rjwills28 Apr 10, 2026
c864e1d
Rename logscale prop variable to not conflict with method name
rjwills28 Apr 10, 2026
5d488bb
Rename logscale prop (again) so it doesn't conflict with method name
rjwills28 Apr 10, 2026
4d5f348
Make property a static final constant
rjwills28 Apr 10, 2026
c32a194
Fix log calculation for Meter widget in case lower limit is 0
rjwills28 Apr 13, 2026
8389de4
Convert OPI log_scale property to logScale for Meter widget
rjwills28 Apr 14, 2026
c46a749
Rename log scale property in Meter widget to log_scale
rjwills28 Apr 14, 2026
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12 changes: 12 additions & 0 deletions app/display/model/src/main/java/org/csstudio/display/builder/model/widgets/MeterWidget.java
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Original file line number Diff line number Diff line change
Expand Up @@ -145,6 +145,10 @@
public static final WidgetPropertyDescriptor<WidgetColor> propKnobColor =
newColorPropertyDescriptor(WidgetPropertyCategory.MISC, "knob_color", Messages.WidgetProperties_KnobColor);

/** Property */
public static final WidgetPropertyDescriptor<Boolean> propLogarithmicScale =
newBooleanPropertyDescriptor(WidgetPropertyCategory.DISPLAY, "log_scale", Messages.WidgetProperties_LogScale);

private volatile WidgetProperty<WidgetColor> foreground;
private volatile WidgetProperty<WidgetColor> background;
private volatile WidgetProperty<WidgetFont> font;
Expand All @@ -158,6 +162,7 @@
private volatile WidgetProperty<Boolean> limits_from_pv;
private volatile WidgetProperty<Double> minimum;
private volatile WidgetProperty<Double> maximum;
private volatile WidgetProperty<Boolean> log_scale;

Check warning on line 165 in app/display/model/src/main/java/org/csstudio/display/builder/model/widgets/MeterWidget.java

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SonarQubeCloud / SonarCloud Code Analysis

Rename this field "log_scale" to match the regular expression '^[a-z][a-zA-Z0-9]*$'. 


See more on https://sonarcloud.io/project/issues?id=ControlSystemStudio_phoebus&issues=AZ1SgIZXv4af9OZ52JZE&open=AZ1SgIZXv4af9OZ52JZE&pullRequest=3764

/** Constructor */
public MeterWidget()
Expand Down Expand Up @@ -195,6 +200,7 @@
properties.add(limits_from_pv = propLimitsFromPV.createProperty(this, true));
properties.add(minimum = propMinimum.createProperty(this, 0.0));
properties.add(maximum = propMaximum.createProperty(this, 100.0));
properties.add(log_scale = propLogarithmicScale.createProperty(this, false));

Check warning on line 203 in app/display/model/src/main/java/org/csstudio/display/builder/model/widgets/MeterWidget.java

View check run for this annotation

SonarQubeCloud / SonarCloud Code Analysis

Extract the assignment out of this expression. 


See more on https://sonarcloud.io/project/issues?id=ControlSystemStudio_phoebus&issues=AZ12xvaTAuf7ECOyYl0I&open=AZ12xvaTAuf7ECOyYl0I&pullRequest=3764
}

/** @return 'foreground_color' property */
Expand Down Expand Up @@ -274,4 +280,10 @@
{
return maximum;
}

/** @return 'log_scale' property */
public WidgetProperty<Boolean> propLogScale()
{
return log_scale;
}
}
4 changes: 4 additions & 0 deletions .../java/org/csstudio/display/builder/representation/javafx/widgets/MeterRepresentation.java
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Original file line number Diff line number Diff line change
Expand Up @@ -64,6 +64,7 @@ protected void registerListeners()
model_widget.propMaximum().addUntypedPropertyListener(valueListener);
model_widget.propShowValue().addUntypedPropertyListener(valueListener);
model_widget.runtimePropValue().addUntypedPropertyListener(valueListener);
model_widget.propLogScale().addUntypedPropertyListener(valueListener);
valueChanged(null, null, null);
}

Expand All @@ -82,6 +83,7 @@ protected void unregisterListeners()
model_widget.propMaximum().removePropertyListener(valueListener);
model_widget.propShowValue().removePropertyListener(valueListener);
model_widget.runtimePropValue().removePropertyListener(valueListener);
model_widget.propLogScale().removePropertyListener(valueListener);
super.unregisterListeners();
}

Expand Down Expand Up @@ -142,6 +144,8 @@ private void valueChanged(final WidgetProperty<?> property, final Object old_val
}
else
meter.setValue(value, "");

meter.setLogScale(model_widget.propLogScale().getValue());
}

@Override
Expand Down
7 changes: 7 additions & 0 deletions app/rtplot/src/main/java/org/csstudio/javafx/rtplot/RTMeter.java
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Original file line number Diff line number Diff line change
Expand Up @@ -61,6 +61,13 @@ public class RTMeter extends ImageView
/** Area of this meter */
protected volatile Rectangle area = new Rectangle(0, 0, 0, 0);

/** @param logscale Use log scale for y-axis? */
public void setLogScale(final boolean logscale)
{
scale.setLogarithmic(logscale);
requestUpdate();
}

/** Listener to {@link PlotPart}s (scale), triggering refresh of meter */
protected final PlotPartListener plot_part_listener = new PlotPartListener()
{
Expand Down
12 changes: 11 additions & 1 deletion app/rtplot/src/main/java/org/csstudio/javafx/rtplot/internal/MeterScale.java
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,8 @@
import org.csstudio.javafx.rtplot.AxisRange;
import org.csstudio.javafx.rtplot.internal.util.GraphicsUtils;

import static org.csstudio.javafx.rtplot.internal.util.Log10.log10;

/** 'Round' numeric scale for a meter.
* @author Kay Kasemir
*/
Expand Down Expand Up @@ -131,7 +133,15 @@ public double getAngle(final double value)
if (Double.isFinite(value))
{
final AxisRange<Double> range = getValueRange();
return start_angle + (value - range.getLow()) * angle_range / (range.getHigh() - range.getLow());
if (isLogarithmic())
{
return start_angle + (log10(value) - log10(range.getLow())) * angle_range / (log10(range.getHigh()) - log10(range.getLow()));
}
else
{
return start_angle + (value - range.getLow()) * angle_range / (range.getHigh() - range.getLow());
}

}
else
return Double.NaN;
Expand Down
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