Java tutorial
/******************************************************************************* * Copyright (c) 2010 Oak Ridge National Laboratory. * 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 org.csstudio.trends.databrowser2.preferences; import java.time.Duration; import org.csstudio.swt.rtplot.TraceType; import org.csstudio.trends.databrowser2.Activator; import org.csstudio.trends.databrowser2.Messages; import org.csstudio.trends.databrowser2.model.ArchiveRescale; import org.eclipse.core.runtime.preferences.InstanceScope; import org.eclipse.jface.preference.BooleanFieldEditor; import org.eclipse.jface.preference.ComboFieldEditor; import org.eclipse.jface.preference.FieldEditorPreferencePage; import org.eclipse.jface.preference.IntegerFieldEditor; import org.eclipse.jface.preference.RadioGroupFieldEditor; import org.eclipse.jface.preference.StringFieldEditor; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.IWorkbench; import org.eclipse.ui.IWorkbenchPreferencePage; import org.eclipse.ui.preferences.ScopedPreferenceStore; /** Preference Page, registered in plugin.xml * @author Kay Kasemir * @author Takashi Nakamoto - added archive server alias */ public class PreferencePage extends FieldEditorPreferencePage implements IWorkbenchPreferencePage { /** Initialize */ public PreferencePage() { super(FieldEditorPreferencePage.GRID); setPreferenceStore(new ScopedPreferenceStore(InstanceScope.INSTANCE, Activator.PLUGIN_ID)); setMessage(Messages.PrefPage_Title); } /** {@inheritDoc} */ @Override public void init(IWorkbench workbench) { // NOP } /** {@inheritDoc} */ @Override protected void createFieldEditors() { final Composite parent = getFieldEditorParent(); // Time span: 60 seconds .. 1 month final IntegerFieldEditor timespan = new IntegerFieldEditor(Preferences.TIME_SPAN, Messages.PrefPage_TimeRange, parent); timespan.setValidRange(60, 60 * 60 * 24 * 30); addField(timespan); // Scan period: >=0 final StringFieldEditor scanperiod = new StringFieldEditor(Preferences.SCAN_PERIOD, Messages.PrefPage_ScanPeriod, parent) { @Override protected boolean checkState() { final Text text = getTextControl(); if (text == null) return false; try { final double period = Double.parseDouble(text.getText().trim()); if (period < 0) { showErrorMessage(Messages.ScanPeriodTT); return false; } clearErrorMessage(); return true; } catch (Exception ex) { showErrorMessage(Messages.ScanPeriodTT); return false; } } }; addField(scanperiod); // Live sample buffer: 0 ... max int final IntegerFieldEditor buffersize = new IntegerFieldEditor(Preferences.BUFFER_SIZE, Messages.PrefPage_LiveBufferSize, parent); buffersize.setValidRange(0, Integer.MAX_VALUE); addField(buffersize); // Refresh period: >0 seconds final StringFieldEditor updateperiod = new StringFieldEditor(Preferences.UPDATE_PERIOD, Messages.PrefPage_UpdatePeriod, parent) { @Override protected boolean checkState() { final Text text = getTextControl(); if (text == null) return false; try { final double period = Double.parseDouble(text.getText().trim()); if (period <= 0) { showErrorMessage(Messages.UpdatePeriodTT); return false; } clearErrorMessage(); return true; } catch (Exception ex) { showErrorMessage(Messages.UpdatePeriodTT); return false; } } }; addField(updateperiod); // Line Width: Some pixel range final IntegerFieldEditor linewidth = new IntegerFieldEditor(Preferences.LINE_WIDTH, Messages.PrefPage_TraceLineWidth, parent); linewidth.setValidRange(0, 100); addField(linewidth); // Opacity: 0..100% final IntegerFieldEditor opacity = new IntegerFieldEditor(Preferences.OPACITY, Messages.PrefPage_TraceOpacity, parent); opacity.setValidRange(0, 100); addField(opacity); // Trace type options final TraceType trace_values[] = TraceType.values(); final String trace_labels_and_values[][] = new String[trace_values.length][2]; for (int i = 0; i < trace_values.length; ++i) { trace_labels_and_values[i][0] = trace_values[i].toString(); trace_labels_and_values[i][1] = trace_values[i].name(); } final ComboFieldEditor trace_types = new ComboFieldEditor(Preferences.TRACE_TYPE, Messages.TraceTypes_Label, trace_labels_and_values, parent); addField(trace_types); // Archive fetch delay: 0.1 .. 10 seconds final IntegerFieldEditor fetch_delay = new IntegerFieldEditor(Preferences.ARCHIVE_FETCH_DELAY, Messages.PrefPage_ArchiveFetchDelay, parent); fetch_delay.setValidRange(100, 10000); addField(fetch_delay); // Plot bins: 10 ... one bin per second for a year final IntegerFieldEditor plotbins = new IntegerFieldEditor(Preferences.PLOT_BINS, Messages.PrefPage_PlotBins, parent); plotbins.setValidRange(10, 365 * 24 * 60 * 60); addField(plotbins); // Future Buffer: 10 ... final IntegerFieldEditor scroll_step = new IntegerFieldEditor(Preferences.SCROLL_STEP, Messages.ScrollStepLbl, parent); scroll_step.setValidRange(1, (int) Duration.ofDays(1).getSeconds()); ((Text) scroll_step.getTextControl(parent)).setToolTipText(Messages.ScrollStepTT); addField(scroll_step); // Archive rescale options final ArchiveRescale values[] = ArchiveRescale.values(); final String labels_and_values[][] = new String[values.length][2]; for (int i = 0; i < values.length; ++i) { labels_and_values[i][0] = values[i].toString(); labels_and_values[i][1] = values[i].name(); } final RadioGroupFieldEditor rescale = new RadioGroupFieldEditor(Preferences.ARCHIVE_RESCALE, Messages.ArchiveRescale_Label, 1, labels_and_values, parent, false); addField(rescale); // Server URLs final StringTableFieldEditor urls = new StringTableFieldEditor(parent, Preferences.URLS, Messages.PrefPage_DataServerURLs, new String[] { Messages.URL, Messages.ServerAlias }, new boolean[] { true, true }, new int[] { 500, 100 }, new ArchiveURLEditor(parent.getShell())); addField(urls); // Default archives final StringTableFieldEditor archives = new StringTableFieldEditor(parent, Preferences.ARCHIVES, Messages.PrefPage_Archives, new String[] { Messages.ArchiveName, Messages.ArchiveKey, Messages.URL }, new boolean[] { true, true, true }, new int[] { 100, 50, 500 }, new ArchiveDataSourceEditor(parent.getShell())); addField(archives); addField(new BooleanFieldEditor(Preferences.PROMPT_FOR_ERRORS, Messages.PromptForErrors_Label, parent)); addField(new BooleanFieldEditor(Preferences.USE_DEFAULT_ARCHIVES, Messages.UseDefaultArchives_Label, parent)); addField(new BooleanFieldEditor(Preferences.USE_AUTO_SCALE, Messages.UseAutoScale_Label, parent)); addField(new BooleanFieldEditor(Preferences.AUTOMATIC_HISTORY_REFRESH, Messages.PrefPage_AutomaticHistoryRefresh, parent)); addField(new BooleanFieldEditor(Preferences.ALLOW_HIDE_TRACE, Messages.AllowHideTrace, parent)); addField(new BooleanFieldEditor(Preferences.ALLOW_REQUEST_RAW, Messages.AllowRequestRaw, parent)); } }