Java tutorial
/**************************************************************************************** * Copyright (c) 2011 Norbert Nagold <norbert.nagold@gmail.com> * * Copyright (c) 2014 Michael Goldbach <trashcutter@googlemail.com> * * * * This program is free software; you can redistribute it and/or modify it under * * the terms of the GNU General Public License as published by the Free Software * * Foundation; either version 3 of the License, or (at your option) any later * * version. * * * * This program is distributed in the hope that it will be useful, but WITHOUT ANY * * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A * * PARTICULAR PURPOSE. See the GNU General Public License for more details. * * * * You should have received a copy of the GNU General Public License along with * * this program. If not, see <http://www.gnu.org/licenses/>. * ****************************************************************************************/ package com.wildplot.android.ankistats; import android.database.Cursor; import android.graphics.Bitmap; import android.widget.ImageView; import com.wildplot.android.rendering.*; import com.wildplot.android.rendering.graphics.wrapper.BufferedImage; import com.wildplot.android.rendering.graphics.wrapper.Color; import com.wildplot.android.rendering.graphics.wrapper.Graphics2D; import com.wildplot.android.rendering.graphics.wrapper.Rectangle; import org.json.JSONException; import org.json.JSONObject; import java.util.ArrayList; /** * Created by mig on 06.07.2014. */ public class Intervals { private AnkiDb mAnkiDb; private ImageView mImageView; private CollectionData mCollectionData; private int mFrameThickness = 60; private int targetPixelDistanceBetweenTics = 150; private boolean mFoundLearnCards = false; private boolean mFoundCramCards = false; private int mMaxCards = 0; private int mMaxElements = 0; private int mType; private int mTitle; private boolean mBackwards; private int[] mValueLabels; private int[] mColors; private int[] mAxisTitles; private double[][] mSeriesList; private boolean mFoundRelearnCards; private double barThickness = 0.6; private String mAverage; private String mLongest; private double[][] mCumulative; public Intervals(AnkiDb ankiDb, ImageView imageView, CollectionData collectionData) { mAnkiDb = ankiDb; mImageView = imageView; mCollectionData = collectionData; } public Bitmap renderChart(int type) { calculateIntervals(type); int height = mImageView.getMeasuredHeight(); int width = mImageView.getMeasuredWidth(); if (height <= 0 || width <= 0) { return null; } BufferedImage bufferedFrameImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB); Graphics2D g = bufferedFrameImage.createGraphics(); Rectangle rect = new Rectangle(width, height); g.setClip(rect); g.setColor(Color.BLACK); float textSize = AnkiStatsApplication.getInstance().getmStandardTextSize() * 0.75f; g.setFontSize(textSize); float FontHeigth = g.getFontMetrics().getHeight(true); mFrameThickness = Math.round(FontHeigth * 4.0f); //System.out.println("frame thickness: " + mFrameThickness); PlotSheet plotSheet = new PlotSheet(mSeriesList[0][0] - 0.5, mSeriesList[0][mSeriesList[0].length - 1] + 0.5, 0, mMaxCards * 1.1); plotSheet.setFrameThickness(mFrameThickness); //no title because of tab title //plotSheet.setTitle(mImageView.getResources().getString(mTitle)); double xTics = ticsCalcX(targetPixelDistanceBetweenTics, rect); double yTics = ticsCalcY(targetPixelDistanceBetweenTics, rect); XAxis xaxis = new XAxis(plotSheet, 0, xTics, xTics / 2.0); YAxis yaxis = new YAxis(plotSheet, 0, yTics, yTics / 2.0); xaxis.setOnFrame(); xaxis.setName(mImageView.getResources().getStringArray(R.array.due_x_axis_title)[mAxisTitles[0]]); xaxis.setIntegerNumbering(true); yaxis.setIntegerNumbering(true); yaxis.setName(mImageView.getResources().getString(mAxisTitles[1])); yaxis.setOnFrame(); BarGraph[] barGraphs = new BarGraph[mSeriesList.length - 1]; for (int i = 1; i < mSeriesList.length; i++) { double[][] bars = new double[2][]; bars[0] = mSeriesList[0]; bars[1] = mSeriesList[i]; barGraphs[i - 1] = new BarGraph(plotSheet, barThickness, bars, new Color(mImageView.getResources().getColor(mColors[i - 1]))); barGraphs[i - 1].setFilling(true); barGraphs[i - 1].setName(mImageView.getResources().getString(mValueLabels[i - 1])); //barGraph.setFillColor(Color.GREEN.darker()); barGraphs[i - 1].setFillColor(new Color(mImageView.getResources().getColor(mColors[i - 1]))); } //double maxCumulative = mCumulative[1][mCumulative[1].length-1]; PlotSheet hiddenPlotSheet = new PlotSheet(mSeriesList[0][0] - 0.5, mSeriesList[0][mSeriesList[0].length - 1] + 0.5, 0, 105.0); //for second y-axis hiddenPlotSheet.setFrameThickness(mFrameThickness); Lines lines = new Lines(hiddenPlotSheet, mCumulative, Color.BLACK); lines.setSize(3f); lines.setName(mImageView.getResources().getString(R.string.stats_cumulative_percentage)); lines.setShadow(5f, 3f, 3f, Color.BLACK); double rightYtics = ticsCalc(targetPixelDistanceBetweenTics, rect, 105.0); YAxis rightYaxis = new YAxis(hiddenPlotSheet, 0, rightYtics, rightYtics / 2.0); rightYaxis.setIntegerNumbering(true); rightYaxis.setName(mImageView.getResources().getString(mAxisTitles[2])); rightYaxis.setOnRightSideFrame(); int red = Color.LIGHT_GRAY.getRed(); int green = Color.LIGHT_GRAY.getGreen(); int blue = Color.LIGHT_GRAY.getBlue(); Color newGridColor = new Color(red, green, blue, 222); XGrid xGrid = new XGrid(plotSheet, 0, targetPixelDistanceBetweenTics); YGrid yGrid = new YGrid(plotSheet, 0, targetPixelDistanceBetweenTics); xGrid.setColor(newGridColor); yGrid.setColor(newGridColor); plotSheet.setFontSize(textSize); for (BarGraph barGraph : barGraphs) { plotSheet.addDrawable(barGraph); } plotSheet.addDrawable(lines); plotSheet.addDrawable(xaxis); plotSheet.addDrawable(yaxis); plotSheet.addDrawable(rightYaxis); plotSheet.addDrawable(xGrid); plotSheet.addDrawable(yGrid); plotSheet.paint(g); Bitmap bitmap = bufferedFrameImage.getBitmap(); bitmap.prepareToDraw(); return bitmap; } public boolean calculateIntervals(int type) { mType = type; double all = 0, avg = 0, max_ = 0; mType = type; mBackwards = true; mTitle = R.string.stats_review_intervals; mAxisTitles = new int[] { type, R.string.stats_cards, R.string.stats_percentage }; mValueLabels = new int[] { R.string.stats_cards_intervals }; mColors = new int[] { R.color.stats_interval }; int num = 0; String lim = ""; int chunk = 0; switch (type) { case Utils.TYPE_MONTH: num = 31; chunk = 1; lim = " and grp <= 30"; break; case Utils.TYPE_YEAR: num = 52; chunk = 7; lim = " and grp <= 52"; break; case Utils.TYPE_LIFE: num = -1; chunk = 30; lim = ""; break; } ArrayList<double[]> list = new ArrayList<double[]>(); Cursor cur = null; try { cur = mAnkiDb.getDatabase() .rawQuery("select ivl / " + chunk + " as grp, count() from cards " + "where did in " + _limitWholeOnly() + " and queue = 2 " + lim + " " + "group by grp " + "order by grp", null); while (cur.moveToNext()) { list.add(new double[] { cur.getDouble(0), cur.getDouble(1) }); } if (cur != null && !cur.isClosed()) { cur.close(); } cur = mAnkiDb.getDatabase().rawQuery("select count(), avg(ivl), max(ivl) from cards where did in " + _limitWholeOnly() + " and queue = 2", null); cur.moveToFirst(); all = cur.getDouble(0); avg = cur.getDouble(1); max_ = cur.getDouble(2); } finally { if (cur != null && !cur.isClosed()) { cur.close(); } } // small adjustment for a proper chartbuilding with achartengine if (list.size() == 0 || list.get(0)[0] > 0) { list.add(0, new double[] { 0, 0, 0 }); } if (num == -1 && list.size() < 2) { num = 31; } if (type != Utils.TYPE_LIFE && list.get(list.size() - 1)[0] < num) { list.add(new double[] { num, 0 }); } else if (type == Utils.TYPE_LIFE && list.size() < 2) { list.add(new double[] { Math.max(12, list.get(list.size() - 1)[0] + 1), 0 }); } mSeriesList = new double[2][list.size()]; for (int i = 0; i < list.size(); i++) { double[] data = list.get(i); mSeriesList[0][i] = data[0]; // grp mSeriesList[1][i] = data[1]; // cnt if (mSeriesList[1][i] > mMaxCards) mMaxCards = (int) Math.round(data[1]); } mCumulative = Utils.createCumulative(mSeriesList); for (int i = 0; i < list.size(); i++) { mCumulative[1][i] /= all / 100; } mMaxElements = list.size() - 1; mAverage = Utils.fmtTimeSpan((int) Math.round(avg * 86400)); mLongest = Utils.fmtTimeSpan((int) Math.round(max_ * 86400)); return list.size() > 0; } public double ticsCalcX(int pixelDistance, Rectangle field) { double deltaRange = mMaxElements - 0; int ticlimit = field.width / pixelDistance; double tics = Math.pow(10, (int) Math.log10(deltaRange / ticlimit)); while (2.0 * (deltaRange / (tics)) <= ticlimit) { tics /= 2.0; } while ((deltaRange / (tics)) / 2 >= ticlimit) { tics *= 2.0; } return tics; } public double ticsCalcY(int pixelDistance, Rectangle field) { double deltaRange = mMaxCards - 0; int ticlimit = field.height / pixelDistance; double tics = Math.pow(10, (int) Math.log10(deltaRange / ticlimit)); while (2.0 * (deltaRange / (tics)) <= ticlimit) { tics /= 2.0; } while ((deltaRange / (tics)) / 2 >= ticlimit) { tics *= 2.0; } return tics; } public double ticsCalc(int pixelDistance, Rectangle field, double deltaRange) { int ticlimit = field.height / pixelDistance; double tics = Math.pow(10, (int) Math.log10(deltaRange / ticlimit)); while (2.0 * (deltaRange / (tics)) <= ticlimit) { tics /= 2.0; } while ((deltaRange / (tics)) / 2 >= ticlimit) { tics *= 2.0; } return tics; } /** * Daily cutoff ************************************************************* ********************************** * This function uses GregorianCalendar so as to be sensitive to leap years, daylight savings, etc. */ private String _limitWholeOnly() { ArrayList<Long> ids = new ArrayList<Long>(); for (JSONObject d : mCollectionData.allDecks()) { try { ids.add(d.getLong("id")); } catch (JSONException e) { throw new RuntimeException(e); } } return Utils.ids2str(Utils.arrayList2array(ids)); } private String _revlogLimitWholeOnly() { return ""; } }