Plotter
This commit is contained in:
Sergey Solovyev
parent
abebb25e53
commit
043576f5e8
@ -1,360 +1,62 @@
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/*
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* Copyright (c) 2009-2011. Created by serso aka se.solovyev.
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* For more information, please, contact se.solovyev@gmail.com
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* or visit http://se.solovyev.org
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*/
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package org.solovyev.android.calculator.plot;
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import android.app.Activity;
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import android.graphics.Color;
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import android.content.Intent;
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import android.os.Bundle;
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import android.os.Handler;
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import android.util.Log;
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import android.view.View;
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import android.view.ViewGroup;
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import android.view.Window;
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import android.widget.Toast;
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import jscl.math.Expression;
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import jscl.math.Generic;
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import jscl.math.function.Constant;
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import jscl.text.ParseException;
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import org.achartengine.ChartFactory;
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import org.achartengine.GraphicalView;
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import org.achartengine.chart.CubicLineChart;
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import org.achartengine.chart.PointStyle;
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import org.achartengine.chart.XYChart;
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import org.achartengine.model.XYMultipleSeriesDataset;
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import org.achartengine.model.XYSeries;
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import org.achartengine.renderer.BasicStroke;
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import org.achartengine.renderer.XYMultipleSeriesRenderer;
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import org.achartengine.renderer.XYSeriesRenderer;
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import org.achartengine.tools.PanListener;
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import org.achartengine.tools.ZoomEvent;
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import org.achartengine.tools.ZoomListener;
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import com.actionbarsherlock.app.SherlockFragmentActivity;
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import org.jetbrains.annotations.NotNull;
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import org.jetbrains.annotations.Nullable;
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import org.solovyev.android.calculator.CalculatorActivityHelper;
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import org.solovyev.android.calculator.CalculatorApplication;
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import org.solovyev.android.calculator.R;
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import org.solovyev.android.calculator.CalculatorParseException;
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import org.solovyev.android.calculator.PreparedExpression;
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import org.solovyev.android.calculator.ToJsclTextProcessor;
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import org.solovyev.common.MutableObject;
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import java.io.Serializable;
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/**
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* User: serso
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* Date: 12/1/11
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* Time: 12:40 AM
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* Date: 9/30/12
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* Time: 4:56 PM
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*/
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public class CalculatorPlotActivity extends Activity {
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private static final String TAG = CalculatorPlotActivity.class.getSimpleName();
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private static final int DEFAULT_NUMBER_OF_STEPS = 100;
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private static final int DEFAULT_MIN_NUMBER = -10;
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private static final int DEFAULT_MAX_NUMBER = 10;
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public static final String INPUT = "org.solovyev.android.calculator.CalculatorPlotActivity_input";
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public static final long EVAL_DELAY_MILLIS = 200;
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private XYChart chart;
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/**
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* The encapsulated graphical view.
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*/
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private GraphicalView graphicalView;
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public class CalculatorPlotActivity extends SherlockFragmentActivity {
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@NotNull
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private Generic expression;
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@NotNull
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private Constant variable;
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private final CalculatorActivityHelper activityHelper = CalculatorApplication.getInstance().createActivityHelper(R.layout.main_empty, CalculatorPlotActivity.class.getSimpleName());
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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public void onCreate(@Nullable Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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Bundle extras = getIntent().getExtras();
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final Input input = (Input) extras.getSerializable(INPUT);
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activityHelper.onCreate(this, savedInstanceState);
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try {
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final PreparedExpression preparedExpression = ToJsclTextProcessor.getInstance().process(input.getExpression());
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this.expression = Expression.valueOf(preparedExpression.getExpression());
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this.variable = new Constant(input.getVariableName());
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final Intent intent = getIntent();
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String title = extras.getString(ChartFactory.TITLE);
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if (title == null) {
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requestWindowFeature(Window.FEATURE_NO_TITLE);
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} else if (title.length() > 0) {
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setTitle(title);
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}
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setContentView(R.layout.calc_plot_view);
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final Object lastNonConfigurationInstance = getLastNonConfigurationInstance();
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setGraphicalView(lastNonConfigurationInstance instanceof PlotBoundaries ? (PlotBoundaries)lastNonConfigurationInstance : null);
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} catch (ParseException e) {
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Toast.makeText(this, e.getLocalizedMessage(), Toast.LENGTH_LONG).show();
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finish();
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} catch (ArithmeticException e) {
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Toast.makeText(this, e.getLocalizedMessage(), Toast.LENGTH_LONG).show();
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finish();
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} catch (CalculatorParseException e) {
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Toast.makeText(this, e.getLocalizedMessage(), Toast.LENGTH_LONG).show();
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finish();
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}
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}
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private void setGraphicalView(@Nullable PlotBoundaries plotBoundaries) {
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double minValue = plotBoundaries == null ? DEFAULT_MIN_NUMBER : plotBoundaries.xMin;
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double maxValue = plotBoundaries == null ? DEFAULT_MAX_NUMBER : plotBoundaries.xMax;
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final ViewGroup graphContainer = (ViewGroup) findViewById(R.id.plot_view_container);
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if (graphicalView != null) {
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graphContainer.removeView(graphicalView);
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}
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chart = prepareChart(minValue, maxValue, expression, variable);
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// reverting boundaries (as in prepareChart() we add some cached values )
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double minX = Double.MAX_VALUE;
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double minY = Double.MAX_VALUE;
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double maxX = Double.MIN_VALUE;
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double maxY = Double.MIN_VALUE;
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for (XYSeries series : chart.getDataset().getSeries()) {
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minX = Math.min(minX, series.getMinX());
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minY = Math.min(minY, series.getMinY());
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maxX = Math.max(maxX, series.getMaxX());
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maxY = Math.max(maxY, series.getMaxY());
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}
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Log.d(CalculatorPlotActivity.class.getName(), "min x: " + minX + ", min y: " + minY + ", max x: " + maxX + ", max y: " + maxY);
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Log.d(CalculatorPlotActivity.class.getName(), "Plot boundaries are " + plotBoundaries);
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if (plotBoundaries == null) {
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chart.getRenderer().setXAxisMin(Math.max(minX, minValue));
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chart.getRenderer().setYAxisMin(Math.max(minY, minValue));
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chart.getRenderer().setXAxisMax(Math.min(maxX, maxValue));
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chart.getRenderer().setYAxisMax(Math.min(maxY, maxValue));
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final Bundle arguments;
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if (intent != null) {
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arguments = intent.getExtras();
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} else {
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chart.getRenderer().setXAxisMin(plotBoundaries.xMin);
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chart.getRenderer().setYAxisMin(plotBoundaries.yMin);
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chart.getRenderer().setXAxisMax(plotBoundaries.xMax);
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chart.getRenderer().setYAxisMax(plotBoundaries.yMax);
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arguments = null;
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}
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graphicalView = new GraphicalView(this, chart);
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graphicalView.addZoomListener(new ZoomListener() {
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@Override
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public void zoomApplied(ZoomEvent e) {
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updateDataSets(chart);
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activityHelper.addTab(this, "plot", CalculatorPlotFragment.class, arguments, R.string.c_plot, R.id.main_layout);
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}
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@Override
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public void zoomReset() {
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updateDataSets(chart);
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}
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}, true, true);
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protected void onSaveInstanceState(Bundle outState) {
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super.onSaveInstanceState(outState);
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graphicalView.addPanListener(new PanListener() {
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@Override
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public void panApplied() {
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Log.d(TAG, "org.achartengine.tools.PanListener.panApplied");
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updateDataSets(chart);
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}
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});
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graphContainer.addView(graphicalView);
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updateDataSets(chart, 50);
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}
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private void updateDataSets(@NotNull final XYChart chart) {
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updateDataSets(chart, EVAL_DELAY_MILLIS);
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}
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private void updateDataSets(@NotNull final XYChart chart, long millisToWait) {
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pendingOperation.setObject(new Runnable() {
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@Override
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public void run() {
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// allow only one runner at one time
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synchronized (pendingOperation) {
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//lock all operations with history
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if (pendingOperation.getObject() == this) {
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Log.d(TAG, "org.solovyev.android.calculator.plot.CalculatorPlotActivity.updateDataSets");
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final XYMultipleSeriesRenderer dr = chart.getRenderer();
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//Log.d(CalculatorPlotActivity.class.getName(), "x = [" + dr.getXAxisMin() + ", " + dr.getXAxisMax() + "], y = [" + dr.getYAxisMin() + ", " + dr.getYAxisMax() + "]");
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final MyXYSeries realSeries = (MyXYSeries)chart.getDataset().getSeriesAt(0);
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final MyXYSeries imagSeries;
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if (chart.getDataset().getSeriesCount() > 1) {
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imagSeries = (MyXYSeries)chart.getDataset().getSeriesAt(1);
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} else {
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imagSeries = new MyXYSeries(getImagFunctionName(CalculatorPlotActivity.this.variable), DEFAULT_NUMBER_OF_STEPS * 2);
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}
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try {
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if (PlotUtils.addXY(dr.getXAxisMin(), dr.getXAxisMax(), expression, variable, realSeries, imagSeries, true, DEFAULT_NUMBER_OF_STEPS)) {
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if (chart.getDataset().getSeriesCount() <= 1) {
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chart.getDataset().addSeries(imagSeries);
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chart.getRenderer().addSeriesRenderer(createImagRenderer());
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}
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}
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} catch (ArithmeticException e) {
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// todo serso: translate
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Toast.makeText(CalculatorPlotActivity.this, "Arithmetic error: " + e.getLocalizedMessage(), Toast.LENGTH_LONG).show();
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CalculatorPlotActivity.this.finish();
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}
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if (pendingOperation.getObject() == this) {
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graphicalView.repaint();
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}
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}
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}
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}
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});
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new Handler().postDelayed(pendingOperation.getObject(), millisToWait);
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}
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@NotNull
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private static String getImagFunctionName(@NotNull Constant variable) {
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return "g(" + variable.getName() +")" + " = " + "Im(ƒ(" + variable.getName() +"))";
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}
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@NotNull
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private static String getRealFunctionName(@NotNull Generic expression, @NotNull Constant variable) {
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return "ƒ(" + variable.getName() +")" + " = " + expression.toString();
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}
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@NotNull
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private final static MutableObject<Runnable> pendingOperation = new MutableObject<Runnable>();
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private static XYChart prepareChart(final double minValue, final double maxValue, @NotNull final Generic expression, @NotNull final Constant variable) {
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final MyXYSeries realSeries = new MyXYSeries(getRealFunctionName(expression, variable), DEFAULT_NUMBER_OF_STEPS * 2);
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final MyXYSeries imagSeries = new MyXYSeries(getImagFunctionName(variable), DEFAULT_NUMBER_OF_STEPS * 2);
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boolean imagExists = PlotUtils.addXY(minValue, maxValue, expression, variable, realSeries, imagSeries, false, DEFAULT_NUMBER_OF_STEPS);
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final XYMultipleSeriesDataset data = new XYMultipleSeriesDataset();
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data.addSeries(realSeries);
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if (imagExists) {
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data.addSeries(imagSeries);
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}
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final XYMultipleSeriesRenderer renderer = new XYMultipleSeriesRenderer();
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renderer.setShowGrid(true);
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renderer.setXTitle(variable.getName());
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renderer.setYTitle("f(" + variable.getName() + ")");
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renderer.setChartTitleTextSize(20);
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renderer.setZoomEnabled(true);
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renderer.setZoomButtonsVisible(true);
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renderer.addSeriesRenderer(createCommonRenderer());
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if (imagExists) {
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renderer.addSeriesRenderer(createImagRenderer());
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}
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return new CubicLineChart(data, renderer, 0.1f);
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}
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private static XYSeriesRenderer createImagRenderer() {
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final XYSeriesRenderer imagRenderer = createCommonRenderer();
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imagRenderer.setStroke(BasicStroke.DASHED);
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imagRenderer.setColor(Color.LTGRAY);
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return imagRenderer;
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activityHelper.onSaveInstanceState(this, outState);
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}
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@Override
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public Object onRetainNonConfigurationInstance() {
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return new PlotBoundaries(chart.getRenderer());
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}
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protected void onResume() {
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super.onResume();
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private static final class PlotBoundaries implements Serializable {
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private final double xMin;
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private final double xMax;
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private final double yMin;
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private final double yMax;
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public PlotBoundaries(@NotNull XYMultipleSeriesRenderer renderer) {
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this.xMin = renderer.getXAxisMin();
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this.yMin = renderer.getYAxisMin();
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this.xMax = renderer.getXAxisMax();
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this.yMax = renderer.getYAxisMax();
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activityHelper.onResume(this);
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}
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@Override
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public String toString() {
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return "PlotBoundaries{" +
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"yMax=" + yMax +
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", yMin=" + yMin +
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", xMax=" + xMax +
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", xMin=" + xMin +
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'}';
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}
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protected void onDestroy() {
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super.onDestroy();
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activityHelper.onDestroy(this);
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}
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@NotNull
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private static XYSeriesRenderer createCommonRenderer() {
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final XYSeriesRenderer renderer = new XYSeriesRenderer();
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renderer.setFillPoints(true);
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renderer.setPointStyle(PointStyle.POINT);
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renderer.setLineWidth(3);
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renderer.setColor(Color.WHITE);
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renderer.setStroke(BasicStroke.SOLID);
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return renderer;
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}
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public void zoomInClickHandler(@NotNull View v) {
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this.graphicalView.zoomIn();
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}
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public void zoomOutClickHandler(@NotNull View v) {
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this.graphicalView.zoomOut();
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}
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public static class Input implements Serializable {
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@NotNull
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private String expression;
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@NotNull
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private String variableName;
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public Input(@NotNull String expression, @NotNull String variableName) {
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this.expression = expression;
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this.variableName = variableName;
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}
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@NotNull
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public String getExpression() {
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return expression;
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}
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@NotNull
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public String getVariableName() {
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return variableName;
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}
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}
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}
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