Java tutorial
/* * Copyright (C) 2016 ?linson Santos Xavier <isoron@gmail.com> * * This file is part of Loop Habit Tracker. * * Loop Habit Tracker 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. * * Loop Habit Tracker 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 iSoron; import android.content.*; import android.graphics.*; import android.graphics.Paint.*; import android.support.annotation.*; import android.support.v4.content.ContextCompat; import android.util.*; import android.view.*; import com.pipit.agc.R; import java.text.*; import java.util.*; public class HistoryChart extends ScrollableChart { private int[] checkmarks; private Paint pSquareBg, pSquareFg, pTextHeader; private float squareSpacing; private float squareTextOffset; private float headerTextOffset; private float columnWidth; private float columnHeight; private int nColumns; private SimpleDateFormat dfMonth; private SimpleDateFormat dfYear; private Calendar baseDate; private int nDays; /** * 0-based-position of today in the column */ private int todayPositionInColumn; private int colors[]; private RectF baseLocation; private int primaryColor; private boolean isBackgroundTransparent; private int textColor; private int reverseTextColor; private boolean isEditable; private String previousMonth; private String previousYear; private float headerOverflow = 0; @NonNull private Controller controller; public HistoryChart(Context context) { super(context); init(); } public HistoryChart(Context context, AttributeSet attrs) { super(context, attrs); init(); } @Override public void onLongPress(MotionEvent e) { onSingleTapUp(e); } @Override public boolean onSingleTapUp(MotionEvent e) { if (!isEditable) return false; performHapticFeedback(HapticFeedbackConstants.KEYBOARD_TAP); if (controller == null) return false; int pointerId = e.getPointerId(0); float x = e.getX(pointerId); float y = e.getY(pointerId); final Long timestamp = positionToTimestamp(x, y); if (timestamp == null) return false; int offset = timestampToOffset(timestamp); /* if (offset<checkmarks.length){ boolean isChecked = checkmarks[offset] == 0; checkmarks[offset] = (isChecked ? 1 : 2); }*/ controller.onToggleCheckmark(timestamp, offset); postInvalidate(); return true; } public void populateWithRandomData() { Random random = new Random(); checkmarks = new int[100]; for (int i = 0; i < 100; i++) if (random.nextFloat() < 0.3) checkmarks[i] = 2; for (int i = 0; i < 100 - 7; i++) { int count = 0; for (int j = 0; j < 7; j++) if (checkmarks[i + j] != 0) count++; if (count >= 3) checkmarks[i] = Math.max(checkmarks[i], 1); } } public void setCheckmarks(int[] checkmarks) { this.checkmarks = checkmarks; postInvalidate(); } public void setColor(int color) { this.primaryColor = color; initColors(); postInvalidate(); } public void setController(@NonNull Controller controller) { this.controller = controller; } public void setIsBackgroundTransparent(boolean isBackgroundTransparent) { this.isBackgroundTransparent = isBackgroundTransparent; initColors(); } public void setIsEditable(boolean isEditable) { this.isEditable = isEditable; } protected void initPaints() { pTextHeader = new Paint(); pTextHeader.setTextAlign(Align.LEFT); pTextHeader.setAntiAlias(true); pSquareBg = new Paint(); pSquareFg = new Paint(); pSquareFg.setAntiAlias(true); pSquareFg.setTextAlign(Align.CENTER); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); baseLocation.set(0, 0, columnWidth - squareSpacing, columnWidth - squareSpacing); baseLocation.offset(getPaddingLeft(), getPaddingTop()); headerOverflow = 0; previousMonth = ""; previousYear = ""; pTextHeader.setColor(textColor); updateDate(); GregorianCalendar currentDate = (GregorianCalendar) baseDate.clone(); for (int column = 0; column < nColumns - 1; column++) { drawColumn(canvas, baseLocation, currentDate, column); baseLocation.offset(columnWidth, -columnHeight); } drawAxis(canvas, baseLocation); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int width = MeasureSpec.getSize(widthMeasureSpec); int height = MeasureSpec.getSize(heightMeasureSpec); setMeasuredDimension(width, height); } @Override protected void onSizeChanged(int width, int height, int oldWidth, int oldHeight) { if (height < 8) height = 200; float baseSize = height / 8.0f; setScrollerBucketSize((int) baseSize); squareSpacing = InterfaceUtils.dpToPixels(getContext(), 1.0f); float maxTextSize = getResources().getDimension(R.dimen.textMedium); float textSize = height * 0.06f; textSize = Math.min(textSize, maxTextSize); pSquareFg.setTextSize(textSize); pTextHeader.setTextSize(textSize); squareTextOffset = pSquareFg.getFontSpacing() * 0.4f; headerTextOffset = pTextHeader.getFontSpacing() * 0.3f; float rightLabelWidth = getWeekdayLabelWidth() + headerTextOffset; float horizontalPadding = getPaddingRight() + getPaddingLeft(); columnWidth = baseSize; columnHeight = 8 * baseSize; nColumns = (int) ((width - rightLabelWidth - horizontalPadding) / baseSize) + 1; updateDate(); } private void drawAxis(Canvas canvas, RectF location) { float verticalOffset = pTextHeader.getFontSpacing() * 0.4f; for (String day : DateUtils.getLocaleDayNames(Calendar.SHORT)) { location.offset(0, columnWidth); canvas.drawText(day, location.left + headerTextOffset, location.centerY() + verticalOffset, pTextHeader); } } private void drawColumn(Canvas canvas, RectF location, GregorianCalendar date, int column) { drawColumnHeader(canvas, location, date); location.offset(0, columnWidth); for (int j = 0; j < 7; j++) { if (!(column == nColumns - 2 && getDataOffset() == 0 && j > todayPositionInColumn)) { int checkmarkOffset = getDataOffset() * 7 + nDays - 7 * (column + 1) + todayPositionInColumn - j; drawSquare(canvas, location, date, checkmarkOffset); } date.add(Calendar.DAY_OF_MONTH, 1); location.offset(0, columnWidth); } } private void drawColumnHeader(Canvas canvas, RectF location, GregorianCalendar date) { String month = dfMonth.format(date.getTime()); String year = dfYear.format(date.getTime()); String text = null; if (!month.equals(previousMonth)) text = previousMonth = month; else if (!year.equals(previousYear)) text = previousYear = year; if (text != null) { canvas.drawText(text, location.left + headerOverflow, location.bottom - headerTextOffset, pTextHeader); headerOverflow += pTextHeader.measureText(text) + columnWidth * 0.2f; } headerOverflow = Math.max(0, headerOverflow - columnWidth); } private void drawSquare(Canvas canvas, RectF location, GregorianCalendar date, int checkmarkOffset) { if (checkmarkOffset >= checkmarks.length) pSquareBg.setColor(colors[0]); else pSquareBg.setColor(colors[checkmarks[checkmarkOffset]]); pSquareFg.setColor(reverseTextColor); canvas.drawRect(location, pSquareBg); String text = Integer.toString(date.get(Calendar.DAY_OF_MONTH)); canvas.drawText(text, location.centerX(), location.centerY() + squareTextOffset, pSquareFg); } private float getWeekdayLabelWidth() { float width = 0; for (String w : DateUtils.getLocaleDayNames(Calendar.SHORT)) width = Math.max(width, pSquareFg.measureText(w)); return width; } private void init() { isEditable = false; checkmarks = new int[0]; //controller = new Controller() {}; initColors(); initPaints(); initDateFormats(); initRects(); } private void initColors() { if (isBackgroundTransparent) primaryColor = InterfaceUtils.setMinValue(primaryColor, 0.75f); int red = Color.red(primaryColor); int green = Color.green(primaryColor); int blue = Color.blue(primaryColor); if (isBackgroundTransparent) { colors = new int[3]; colors[0] = Color.argb(16, 255, 255, 255); colors[1] = Color.argb(128, red, green, blue); colors[2] = primaryColor; textColor = Color.WHITE; reverseTextColor = Color.WHITE; } else { colors = new int[3]; /* colors[0] = InterfaceUtils.getStyledColor(getContext(), R.attr.lowContrastTextColor); colors[1] = ContextCompat.getColor(getContext(), R.color.schemethree_darkerred); colors[2] = primaryColor; */ //ABUSIVEGYMREMINDER: Don't have an easy interface for custom colors, so this is my customization colors[0] = InterfaceUtils.getStyledColor(getContext(), R.attr.implicitHitColor); colors[1] = InterfaceUtils.getStyledColor(getContext(), R.attr.missColor); colors[2] = InterfaceUtils.getStyledColor(getContext(), R.attr.explicitHitColor); textColor = InterfaceUtils.getStyledColor(getContext(), R.attr.mediumContrastTextColor); reverseTextColor = InterfaceUtils.getStyledColor(getContext(), R.attr.highContrastReverseTextColor); } } private void initDateFormats() { dfMonth = DateUtils.getDateFormat("MMM"); dfYear = DateUtils.getDateFormat("yyyy"); } private void initRects() { baseLocation = new RectF(); } private Long positionToTimestamp(float x, float y) { int col = (int) (x / columnWidth); int row = (int) (y / columnWidth); if (row == 0) return null; if (col == nColumns - 1) return null; int offset = col * 7 + (row - 1); Calendar date = (Calendar) baseDate.clone(); date.add(Calendar.DAY_OF_YEAR, offset); if (DateUtils.getStartOfDay(date.getTimeInMillis()) > DateUtils.getStartOfToday()) return null; return date.getTimeInMillis(); } private int timestampToOffset(Long timestamp) { Long day = DateUtils.millisecondsInOneDay; Long today = DateUtils.getStartOfToday(); return (int) ((today - timestamp) / day); } private void updateDate() { baseDate = DateUtils.getStartOfTodayCalendar(); baseDate.add(Calendar.DAY_OF_YEAR, -(getDataOffset() - 1) * 7); nDays = (nColumns - 1) * 7; int realWeekday = DateUtils.getStartOfTodayCalendar().get(Calendar.DAY_OF_WEEK); todayPositionInColumn = (7 + realWeekday - baseDate.getFirstDayOfWeek()) % 7; baseDate.add(Calendar.DAY_OF_YEAR, -nDays); baseDate.add(Calendar.DAY_OF_YEAR, -todayPositionInColumn); } public interface Controller { void onToggleCheckmark(long timestamp, int offset); } }