Java tutorial
/** * This file is protected by Copyright. * Please refer to the COPYRIGHT file distributed with this source distribution. * * This file is part of REDHAWK IDE. * * All rights reserved. This program and the accompanying materials are made available under * the terms of the Eclipse Public License v1.0 which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html. * */ package gov.redhawk.sca.waveform.controlpanel.propertyEditors; import gov.redhawk.common.ui.widgets.Dval; import gov.redhawk.model.sca.ScaPackage; import gov.redhawk.model.sca.ScaSimpleProperty; import gov.redhawk.sca.ui.compatibility.CompatibilityUtil; import java.text.DecimalFormat; import java.text.NumberFormat; import java.text.ParseException; import mil.jpeojtrs.sca.prf.Enumeration; import mil.jpeojtrs.sca.prf.Enumerations; import mil.jpeojtrs.sca.prf.Range; import org.eclipse.core.databinding.UpdateValueStrategy; import org.eclipse.emf.databinding.EMFDataBindingContext; import org.eclipse.emf.databinding.EMFObservables; import org.eclipse.jface.databinding.swt.ISWTObservableValue; import org.eclipse.jface.databinding.swt.SWTObservables; import org.eclipse.jface.databinding.swt.WidgetProperties; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.viewers.ComboViewer; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.swt.SWT; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Text; public class DecimalPropertyEditor<T extends Number> extends PropertyEditor { private static final double INCR_1 = 0.1; private static final double INCR_2 = 5; private static final double INCR_3 = 10; private static final double MIN_1 = 10; private static final double MIN_2 = 100; private static final double PAGE_INCR_MULTIPLIER = 5; private static final double MAX_VALUE_NO_SCI_NOTATION = 10E6; private static final double IBCR_0 = 1000; private static final int UPDATE_DELAY_MS = 200; private final String name; private Number value; private Control control; private final ScaSimpleProperty prop; private Dval dval; private final DecimalFormat form = (DecimalFormat) NumberFormat.getInstance(); private Class<T> valueType; private EMFDataBindingContext context; private ComboViewer enumViewer; private class DecimalUpdateValueStrategy extends UpdateValueStrategy { @Override public Object convert(final Object value) { if (value instanceof Number) { final String pattern = getFormatPattern(); DecimalPropertyEditor.this.form.applyPattern(pattern); final Number d = (Number) value; final String s = DecimalPropertyEditor.this.form.format(d); try { return DecimalPropertyEditor.this.form.parse(s); } catch (final ParseException e) { return value; } } return value; } } private class DecimalUpdateValueStrategy2 extends UpdateValueStrategy { @Override public Object convert(final Object value) { if (value instanceof String) { final String s = (String) value; try { final String pattern = getFormatPattern(); DecimalPropertyEditor.this.form.applyPattern(pattern); if (DecimalPropertyEditor.this.valueType == Float.class) { return DecimalPropertyEditor.this.form.parse(s).floatValue(); } else { return DecimalPropertyEditor.this.form.parse(s).doubleValue(); } } catch (final NumberFormatException e) { return value; } catch (final ParseException e) { return value; } } return value; } } private class DecimalUpdateValueStrategy3 extends UpdateValueStrategy { @Override public Object convert(final Object value) { if (value instanceof Number) { final String pattern = getFormatPattern(); DecimalPropertyEditor.this.form.applyPattern(pattern); final Number d = (Number) value; final String s = DecimalPropertyEditor.this.form.format(d); return s; } return value; } } private class SelectionToLocalValueStrategy extends UpdateValueStrategy { @Override public Object convert(final Object value) { if (value instanceof String) { try { final Enumeration enumer = getEnumFromLabel((String) value); DecimalPropertyEditor.this.form.applyPattern(getFormatPattern()); return DecimalPropertyEditor.this.form.parse(enumer.getValue()); } catch (final ParseException e) { return value; } } return value; } } private class LocalToSelectionValueStrategy extends UpdateValueStrategy { @Override public Object convert(final Object value) { if (value instanceof Number) { DecimalPropertyEditor.this.enumViewer .setSelection(new StructuredSelection(getEnumFromValue((Number) value))); } return value; } } public Enumeration getEnumFromLabel(final String value) { final Enumerations enumValues = (Enumerations) this.enumViewer.getInput(); for (final Enumeration enumer : enumValues.getEnumeration()) { if (enumer.getLabel().equals(value)) { return enumer; } } return null; } public Object getEnumFromValue(final Number value) { final Enumerations enumValues = (Enumerations) this.enumViewer.getInput(); for (final Enumeration enumer : enumValues.getEnumeration()) { if (this.valueType == Double.class) { final Double val = new Double(enumer.getValue()); if (val.doubleValue() == value.doubleValue()) { return enumer; } } else if (this.valueType == Float.class) { final Float val = new Float(enumer.getValue()); if (val.floatValue() == value.floatValue()) { return enumer; } } } return value; } @SuppressWarnings("unchecked") public DecimalPropertyEditor(final String name, final Number value, final ScaSimpleProperty prop) { this.name = name; this.value = value; this.prop = prop; if (value instanceof Float) { this.valueType = (Class<T>) Float.class; } else { this.valueType = (Class<T>) Double.class; } } public String getFormatPattern() { String pattern = ""; if (this.value.doubleValue() > DecimalPropertyEditor.MAX_VALUE_NO_SCI_NOTATION) { if (this.valueType == Float.class) { pattern = "##0.###E0#"; } else { pattern = "##0.######E0#"; } } else { pattern = "#######0.##"; } if (this.dval != null) { this.dval.applyFormat(pattern); } return pattern; } @Override public void setupBindings() { this.context = new EMFDataBindingContext(); if (this.enumViewer == null) { final ScaSimplePropertyControl scaSimplePropertyControl = new ScaSimplePropertyControl(this.control, this.prop); final ISWTObservableValue textObservable = WidgetProperties .text(new int[] { SWT.FocusOut, SWT.DefaultSelection }).observe(this.control); this.context.bindValue(textObservable, scaSimplePropertyControl.getModel(), new DecimalUpdateValueStrategy2(), new DecimalUpdateValueStrategy3()); this.context.bindValue(WidgetProperties.text(SWT.Modify).observeDelayed(UPDATE_DELAY_MS, this.control), scaSimplePropertyControl.getEditingObserable()); this.context.bindValue(scaSimplePropertyControl.getTarget(), EMFObservables.observeValue(this.prop, ScaPackage.Literals.SCA_SIMPLE_PROPERTY__VALUE), new DecimalUpdateValueStrategy(), new DecimalUpdateValueStrategy()); } else { final ScaSimplePropertyControl scaSimplePropertyControl = new ScaSimplePropertyControl( this.enumViewer.getControl(), this.prop); final ISWTObservableValue selectObservable = WidgetProperties.selection() .observe(this.enumViewer.getCombo()); this.context.bindValue(selectObservable, scaSimplePropertyControl.getModel(), new SelectionToLocalValueStrategy(), new LocalToSelectionValueStrategy()); this.context.bindValue(SWTObservables.observeSelection(this.enumViewer.getCombo()), scaSimplePropertyControl.getEditingObserable(), new SelectionToLocalValueStrategy(), null); this.context.bindValue(scaSimplePropertyControl.getTarget(), EMFObservables.observeValue(this.prop, ScaPackage.Literals.SCA_SIMPLE_PROPERTY__VALUE), new DecimalUpdateValueStrategy(), null); } } @Override public void renderNameValuePair(final Composite parent) { final Label label = new Label(parent, SWT.NONE); GridDataFactory.fillDefaults().grab(false, false).applyTo(label); label.setText(this.name); final Range range = this.prop.getDefinition().getRange(); //Dval not working properly on RAP if (range != null && !SWT.getPlatform().startsWith("rap")) { this.dval = new Dval(parent, SWT.BORDER); this.control = this.dval.getTextBox(); final Double min = Double.parseDouble(range.getMin()); final Double max = Double.parseDouble(range.getMax()); this.dval.applyFormat(getFormatPattern()); this.dval.setValue(this.value.doubleValue()); this.dval.setMinimum(min); this.dval.setMaximum(max); double incr = 0; if (this.value.doubleValue() > DecimalPropertyEditor.MAX_VALUE_NO_SCI_NOTATION) { incr = DecimalPropertyEditor.IBCR_0; } else { if (max - min < 1) { incr = DecimalPropertyEditor.INCR_1; } else if (max - min < DecimalPropertyEditor.MIN_1) { incr = 1; } else if (max - min < DecimalPropertyEditor.MIN_2) { incr = DecimalPropertyEditor.INCR_2; } else { incr = DecimalPropertyEditor.INCR_3; } } this.dval.setIncrement(incr); this.dval.setPageIncrement(incr * DecimalPropertyEditor.PAGE_INCR_MULTIPLIER); GridDataFactory.fillDefaults().grab(true, false).applyTo(this.dval); } else { final Enumerations values = this.prop.getDefinition().getEnumerations(); if (values == null || values.getEnumeration() == null || values.getEnumeration().size() == 0) { this.control = new Text(parent, SWT.BORDER); GridDataFactory.fillDefaults().grab(true, false).applyTo(this.control); this.form.applyPattern(getFormatPattern()); ((Text) this.control).setText(this.form.format(this.value)); } else { this.enumViewer = new ComboViewer(parent, SWT.NONE); CompatibilityUtil.disableComboWheelScrollSelect(enumViewer); GridDataFactory.fillDefaults().grab(true, false).applyTo(this.enumViewer.getControl()); this.enumViewer.setContentProvider(new EnumValuesContentProvider()); this.enumViewer.setLabelProvider(new EnumValuesLabelProvider()); this.enumViewer.setInput(this.prop.getDefinition().getEnumerations()); this.enumViewer.addSelectionChangedListener(new ISelectionChangedListener() { @Override public void selectionChanged(final SelectionChangedEvent event) { final Enumeration sel = (Enumeration) ((StructuredSelection) event.getSelection()) .getFirstElement(); DecimalPropertyEditor.this.form.applyPattern(getFormatPattern()); try { DecimalPropertyEditor.this.value = DecimalPropertyEditor.this.form .parse(sel.getValue()); } catch (final ParseException e) { //PASS } } }); } } } @Override public void dispose() { if (this.context != null) { this.context.dispose(); } } }