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/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.util;
/**
* Helps control and display a month view of a calendar that has a current
* selected day.
* <ul>
* <li>Keeps track of current month, day, year</li>
* <li>Keeps track of current cursor position (row, column)</li>
* <li>Provides methods to help display the calendar</li>
* <li>Provides methods to move the cursor up / down / left / right.</li>
* </ul>
*
* This should be used by anyone who presents a month view to users and wishes
* to behave consistently with other widgets and apps; if we ever change our
* mind about when to flip the month, we can change it here only.
*
* @hide
*/
public class DayOfMonthCursor extends MonthDisplayHelper {
private int mRow;
private int mColumn;
/**
* @param year The initial year.
* @param month The initial month.
* @param dayOfMonth The initial dayOfMonth.
* @param weekStartDay What dayOfMonth of the week the week should start,
* in terms of {@link java.util.Calendar} constants such as
* {@link java.util.Calendar#SUNDAY}.
*/
public DayOfMonthCursor(int year, int month, int dayOfMonth, int weekStartDay) {
super(year, month, weekStartDay);
mRow = getRowOf(dayOfMonth);
mColumn = getColumnOf(dayOfMonth);
}
public int getSelectedRow() {
return mRow;
}
public int getSelectedColumn() {
return mColumn;
}
public void setSelectedRowColumn(int row, int col) {
mRow = row;
mColumn = col;
}
public int getSelectedDayOfMonth() {
return getDayAt(mRow, mColumn);
}
/**
* @return 0 if the selection is in the current month, otherwise -1 or +1
* depending on whether the selection is in the first or last row.
*/
public int getSelectedMonthOffset() {
if (isWithinCurrentMonth(mRow, mColumn)) {
return 0;
}
if (mRow == 0) {
return -1;
}
return 1;
}
public void setSelectedDayOfMonth(int dayOfMonth) {
mRow = getRowOf(dayOfMonth);
mColumn = getColumnOf(dayOfMonth);
}
public boolean isSelected(int row, int column) {
return (mRow == row) && (mColumn == column);
}
/**
* Move up one box, potentially flipping to the previous month.
* @return Whether the month was flipped to the previous month
* due to the move.
*/
public boolean up() {
if (isWithinCurrentMonth(mRow - 1, mColumn)) {
// within current month, just move up
mRow--;
return false;
}
// flip back to previous month, same column, first position within month
previousMonth();
mRow = 5;
while(!isWithinCurrentMonth(mRow, mColumn)) {
mRow--;
}
return true;
}
/**
* Move down one box, potentially flipping to the next month.
* @return Whether the month was flipped to the next month
* due to the move.
*/
public boolean down() {
if (isWithinCurrentMonth(mRow + 1, mColumn)) {
// within current month, just move down
mRow++;
return false;
}
// flip to next month, same column, first position within month
nextMonth();
mRow = 0;
while (!isWithinCurrentMonth(mRow, mColumn)) {
mRow++;
}
return true;
}
/**
* Move left one box, potentially flipping to the previous month.
* @return Whether the month was flipped to the previous month
* due to the move.
*/
public boolean left() {
if (mColumn == 0) {
mRow--;
mColumn = 6;
} else {
mColumn--;
}
if (isWithinCurrentMonth(mRow, mColumn)) {
return false;
}
// need to flip to last day of previous month
previousMonth();
int lastDay = getNumberOfDaysInMonth();
mRow = getRowOf(lastDay);
mColumn = getColumnOf(lastDay);
return true;
}
/**
* Move right one box, potentially flipping to the next month.
* @return Whether the month was flipped to the next month
* due to the move.
*/
public boolean right() {
if (mColumn == 6) {
mRow++;
mColumn = 0;
} else {
mColumn++;
}
if (isWithinCurrentMonth(mRow, mColumn)) {
return false;
}
// need to flip to first day of next month
nextMonth();
mRow = 0;
mColumn = 0;
while (!isWithinCurrentMonth(mRow, mColumn)) {
mColumn++;
}
return true;
}
}
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