File	Doc	Category	Size	Date	Package
MonthDisplayHelper.java	API Doc	Android 1.5 API	5595	Wed May 06 22:41:56 BST 2009	android.util

MonthDisplayHelper

• java.lang.Object

Fields Summary
private final int	mWeekStartDay
private Calendar	mCalendar
private int	mNumDaysInMonth
private int	mNumDaysInPrevMonth
private int	mOffset

Constructors Summary
public MonthDisplayHelper(int year, int month, int weekStartDay) param year The year. param month The month. param weekStartDay What day of the week the week should start. if (weekStartDay < Calendar.SUNDAY || weekStartDay > Calendar.SATURDAY) { throw new IllegalArgumentException(); } mWeekStartDay = weekStartDay; mCalendar = Calendar.getInstance(); mCalendar.set(Calendar.YEAR, year); mCalendar.set(Calendar.MONTH, month); mCalendar.set(Calendar.DAY_OF_MONTH, 1); mCalendar.set(Calendar.HOUR_OF_DAY, 0); mCalendar.set(Calendar.MINUTE, 0); mCalendar.set(Calendar.SECOND, 0); mCalendar.getTimeInMillis(); recalculate();
public MonthDisplayHelper(int year, int month) this(year, month, Calendar.SUNDAY);

Methods Summary
public int	getColumnOf(int day) return Which column day is in. return (day + mOffset - 1) % 7;
public int	getDayAt(int row, int column) param row The row, 0-5, starting from the top. param column The column, 0-6, starting from the left. return The day at a particular row, column if (row == 0 && column < mOffset) { return mNumDaysInPrevMonth + column - mOffset + 1; } int day = 7 * row + column - mOffset + 1; return (day > mNumDaysInMonth) ? day - mNumDaysInMonth : day;
public int[]	getDigitsForRow(int row) param row Which row (0-5). return the digits of the month to display in one of the 6 rows of a calendar month display. if (row < 0 || row > 5) { throw new IllegalArgumentException("row " + row + " out of range (0-5)"); } int [] result = new int[7]; for (int column = 0; column < 7; column++) { result[column] = getDayAt(row, column); } return result;
public int	getFirstDayOfMonth() return The first day of the month using a constants such as {@link java.util.Calendar#SUNDAY}. return mCalendar.get(Calendar.DAY_OF_WEEK);
public int	getMonth() return mCalendar.get(Calendar.MONTH);
public int	getNumberOfDaysInMonth() return The number of days in the month. return mNumDaysInMonth;
public int	getOffset() return The offset from displaying everything starting on the very first box. For example, if the calendar is set to display the first day of the week as Sunday, and the month starts on a Wednesday, the offset is 3. return mOffset;
public int	getRowOf(int day) return Which row day is in. return (day + mOffset - 1) / 7;
public int	getWeekStartDay() return mWeekStartDay;
public int	getYear() return mCalendar.get(Calendar.YEAR);
public boolean	isWithinCurrentMonth(int row, int column) return Whether the row and column fall within the month. if (row < 0 || column < 0 || row > 5 || column > 6) { return false; } if (row == 0 && column < mOffset) { return false; } int day = 7 * row + column - mOffset + 1; if (day > mNumDaysInMonth) { return false; } return true;
public void	nextMonth() Increment the month. mCalendar.add(Calendar.MONTH, 1); recalculate();
public void	previousMonth() Decrement the month. mCalendar.add(Calendar.MONTH, -1); recalculate();
private void	recalculate() mNumDaysInMonth = mCalendar.getActualMaximum(Calendar.DAY_OF_MONTH); mCalendar.add(Calendar.MONTH, -1); mNumDaysInPrevMonth = mCalendar.getActualMaximum(Calendar.DAY_OF_MONTH); mCalendar.add(Calendar.MONTH, 1); int firstDayOfMonth = getFirstDayOfMonth(); int offset = firstDayOfMonth - mWeekStartDay; if (offset < 0) { offset += 7; } mOffset = offset;