/*********************************************************************************
* TotalCross Software Development Kit *
* Copyright (C) 2000-2012 SuperWaba Ltda. *
* All Rights Reserved *
* *
* This library and virtual machine 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. *
* *
* This file is covered by the GNU LESSER GENERAL PUBLIC LICENSE VERSION 3.0 *
* A copy of this license is located in file license.txt at the root of this *
* SDK or can be downloaded here: *
* http://www.gnu.org/licenses/lgpl-3.0.txt *
* *
*********************************************************************************/
package tc.samples.app.watch;
import totalcross.sys.*;
import totalcross.ui.*;
import totalcross.ui.event.*;
import totalcross.ui.gfx.*;
/**
* This class draws a watch at the screen.
*/
public class Watch extends Container
{
/** array of used Cities */
public static String[] cities = new String[]
{
"Local Time", "Acapulco", "Amsterdan", "Athens", "Atlanta", "Baghdad", "Bangkok", "Barcelona",
"Beijing", "Beirut", "Berlin", "Bogota", "Brasilia", "Bucharest", "Budapest", "Buenos Aires",
"Cairo", "Caracas", "Chicago", "Copenhagen", "Detroit", "Dublin", "Frankfurt", "Geneva",
"Guadalajara", "Hamburg", "Honolulu", "Havana", "Hong Kong", "Indianapolis", "Istambul", "Jerusalem",
"La Paz", "Lima", "Lisbon", "London", "Los Angeles", "Madrid", "Mexico City", "Miami",
"Milan", "Montevideo", "Montreal", "Moscow", "New Orleans", "New York", "Oslo", "Paris",
"Philadelphia", "Rio de Janeiro", "Rome", "San Francisco", "Santiago", "Sao Paulo", "Seoul", "Shanghai",
"Stockholm", "Sydney", "Tokyo", "Toronto", "Washington", "Zurich"
};
/** array of city timezones */
public static int[] cities_tzdelta = new int[]
{
0, -6, 1, 2, -5, 3, 7, 1,
8, 2, 1, -5, -3, 2, 1, -3,
2, -4, -6, 1, -5, 0, 1, 1,
-6, 1, -10, -5, 8, -5, 2, 2,
-4, -5, 0, 0, -8, 1, -6, -5,
1, -3, -5, 3, -6, -5, 1, 1,
-5, -3, 1, -8, -4, -3, 9, 8,
1, 10, 9, -5, -5, 1
};
private ComboBox cbxCities;
private Label labTime;
private int city_delta_localtime;
private Graphics myg;
public int fillColor = 0xCCFFFF;
public int borderColor = Color.BLACK;
public int labColor = 0x330099;
public int pointerColor = Color.BLACK;
public int markColor = Color.BRIGHT;
private static double acos[];
private static double asin[];
private static StringBuffer sb = new StringBuffer(12);
private int size, centerX, centerY;
private Time time = new Time();
public Watch()
{
cbxCities = new ComboBox(cities);
labTime = new Label("",CENTER);
for (int i = cities_tzdelta.length; --i >= 0;) cities_tzdelta[i] *= 60; // convert to minutes
}
public void initUI()
{
add(cbxCities, CENTER, TOP);
add(labTime, LEFT, BOTTOM+1);
if (acos == null) // create a lookup table for sin and cos - these tend to be slooow when in loop.
{
acos = new double[60];
asin = new double[60];
double tick = 2.0 * Math.PI / 60;
double a = 0;
for (int i = 0; i < 60; a += tick, i++)
{
acos[i] = -Math.cos(a);
asin[i] = Math.sin(a);
}
}
// avoid recompute everything all the time
size = Math.min(width, height);
centerX = width >> 1;
centerY = height >> 1;
// only add after the pre-computation
addTimer(1000);
}
/** Changes the city to the given index of the cities array */
public void setCity(int i)
{
cbxCities.setSelectedIndex(i);
if (i != 0 && Settings.timeZoneMinutes != cities_tzdelta[i]) // if the selected city is in our timezone, keep it. Moreover the daylight saving will be correct
{
int delta_localtime_utc = Settings.timeZoneMinutes; // delta to apply to localtime to get the UTC time
city_delta_localtime = cities_tzdelta[i] - delta_localtime_utc; // apply the city's TZ but we don't know the daylight saving information
}
else
city_delta_localtime = 0;
}
public void onColorsChanged(boolean colorsChanged)
{
if (colorsChanged)
{
cbxCities.setBackColor(this.getBackColor());
labTime.setBackForeColors(this.getBackColor(), labColor);
}
}
private void drawTicks(Graphics g)
{
double b, c;
int i;
int centerX = this.centerX; // get a local reference to an instance variable
int centerY = this.centerY;
int s4 = size / 4;
int s32 = (int) (size / 3.2);
for (i = 0; i < 60; i++)
{
c = acos[i];
b = asin[i];
if ((i % 5) == 0)
g.drawLine(centerX + (int) (b * s4), centerY + (int) (c * s4), centerX + (int) (b * s32), centerY + (int) (c * s32));
else
g.setPixel(centerX + (int) (b * s32), centerY + (int) (c * s32));
}
}
private void drawMarks(Graphics g)
{
int hourHand = size / 6, minuteHand = size / 4, secondHand = minuteHand;
time.update();
int h = time.hour + city_delta_localtime;
int m = time.minute;
int s = time.second;
g.foreColor = pointerColor;
drawPointer(g, (h * 5) + (m / 12), hourHand);
drawPointer(g, m, minuteHand);
if (h < 0)
h += 24;
h = h % 24;
drawPointer(g, s, secondHand);
// draw the hour, saving memory by using a stringbuffer
sb.setLength(0);
if (h < 10)
sb.append('0');
sb.append(h).append(':');
if (m < 10)
sb.append('0');
sb.append(m).append(':');
if (s < 10)
sb.append('0');
sb.append(s);
labTime.setText(sb.toString());
}
private void drawPointer(Graphics g, int angle, int len)
{
double b, c;
while (angle < 0)
angle += 60;
if (angle >= 60)
angle %= 60;
c = acos[angle];
b = asin[angle];
int x2 = centerX + (int) (b * len);
int y2 = centerY + (int) (c * len);
g.drawLine(centerX, centerY, x2, y2);
}
private void drawClock(Graphics g)
{
int s1 = (int) (size / 2.95);
int s2 = (int) (size / 3.05);
g.foreColor = borderColor;
g.drawCircle(centerX, centerY, size / 3);
g.drawCircle(centerX, centerY, s1);
g.backColor = fillColor;
g.fillCircle(centerX, centerY, s2);
drawTicks(g);
drawMarks(g);
}
public void onPaint(Graphics g)
{
super.onPaint(g);
drawClock(g);
}
public void onEvent(Event event)
{
switch (event.type)
{
case ControlEvent.PRESSED:
if (event.target == cbxCities)
setCity(cbxCities.getSelectedIndex());
break;
case TimerEvent.TRIGGERED:
if (myg == null)
myg = getGraphics();
// repaint just the clock
drawClock(myg);
break;
}
}
public void reposition()
{
setW = Settings.screenWidth/2; setH = Settings.screenHeight/2;
super.reposition();
centerX = width >> 1;
centerY = height >> 1;
}
}