/// <summary>
/// Called to draw the watch face
/// </summary>
/// <param name="canvas"></param>
/// <param name="bounds"></param>
public override void OnDraw(Canvas canvas, Rect bounds)
{
_calendar = Calendar.GetInstance(Locale.Default);
// Determine the bounds of the drawing surface:
var width = bounds.Width();
var height = bounds.Height();
// Determine the center of the drawing surface:
var centerX = width / 2.0f;
var centerY = height / 2.0f;
// set a default background color
canvas.DrawColor(Color.Black);
// draw the face ticks (if not in ambient mode)
if (!IsInAmbientMode)
{
// Draw the hour ticks:
var hticks = new WatchTicks(centerX, centerY, 25, 5, -5)
{
TickPaint = hTickPaint
};
hticks.DrawTicks(canvas, 12); // draw 12 of them.
// Draw the minute ticks:
var mticks = new WatchTicks(centerX, centerY, 10, 3, -10)
{
TickPaint = mTickPaint
};
mticks.DrawTicks(canvas, 60, 5); // draw 60 of them, but skip every 5th one [60/12 = 5]
}
var inspectTimerTickRate = _updateRate;
// draw the background (scaled to fit) along with Ticks (if not in ambient mode)
if (!IsInAmbientMode)
{
if (backgroundScaledBitmap == null ||
backgroundScaledBitmap.Width != width || backgroundScaledBitmap.Height != height)
{
backgroundScaledBitmap =
Bitmap.CreateScaledBitmap(backgroundBitmap, width, height, true /* filter */);
}
canvas.DrawBitmap(backgroundScaledBitmap, 0, 0, null);
}
else
{
// AOD
if (aodBackgroundScaledBitmap == null ||
aodBackgroundScaledBitmap.Width != width || aodBackgroundScaledBitmap.Height != height)
{
aodBackgroundScaledBitmap =
Bitmap.CreateScaledBitmap(aodBackgroundBitmap, width, height, true /* filter */);
}
// half-alpha
canvas.DrawBitmap(aodBackgroundScaledBitmap, 0, 0, new Paint()
{
Alpha = MUTE_ALPHA
});
}
// draw something with the date (change the color based on AOD)
var str = DateTime.Now.ToString("ddd, dd MMM");
var textPaint = new Paint
{
Alpha = NORMAL_ALPHA,
AntiAlias = true,
Color = ShouldTimerBeRunning() ? Color.White : Color.Silver, // (change the color based on AOD)
TextSize = centerY / 10.0f
};
var tf = Typeface.Create("Arial", TypefaceStyle.Bold);
textPaint.SetTypeface(tf);
// textPaint.SetShadowLayer(1.5f, -1f, -1f, Color.Argb(MUTE_ALPHA, 50, 50, 50));
var dl = new Coords(centerX - 40, centerY + 40);
canvas.DrawText(str, dl.X, dl.Y, textPaint);
// // draw a central hub
//var bhW = (int)(width / 4.0f);
//var bhH = (int)(height / 4.0f);
//var bhX = centerX - bhW / 2.0f;
//var bhY = centerY - bhH / 2.0f;
//if (hubScaledBitmap == null)
// hubScaledBitmap = Bitmap.CreateScaledBitmap(hubBitmap, bhW, bhH, true /* filter */);
//canvas.DrawBitmap(hubScaledBitmap, bhX, bhY, null);
var secLength = 40;
var minLength = 30;
var hrLength = 20;
if (!IsInAmbientMode)
{ //// draw the millisecond tick hand - have to include padding (from outside edge, as neg. in pixels)
//var milLength = 10;
//var milPad = -10;
//milHand = new WatchHand(HandType.MILLISECONDS, HandStyle.OUTSIDE, centerX, centerY, milLength,
// milPad)
//{ paint = secondPaint };
//milHand.DrawHand(canvas, _calendar);
// Draw the second hand only in interactive mode:
secHand = new WatchHand(HandType.SECONDS, HandStyle.OUTSIDE, centerX, centerY, (int)secLength, -30)
{
Paint = secondPaint
};
secHand.DrawHand(canvas, _calendar);
// Draw the minute hand:
minHand = new WatchHand(HandType.MINUTES, HandStyle.OUTSIDE, centerX, centerY, (int)minLength, -30)
{
Paint = minutePaint
};
minHand.DrawHand(canvas, _calendar);
// Draw the hour hand:
hrHand = new WatchHand(HandType.HOURS, HandStyle.OUTSIDE, centerX, centerY, (int)hrLength, -30)
{
Paint = hourPaint
};
hrHand.DrawHand(canvas, _calendar);
}
else
{
// Draw the outline minute hand:
var outerMinP = WatchFaceFactory.GetMinuteHand(Color.White, false);
outerMinP.StrokeWidth = minutePaint.StrokeWidth + 4;
minHand = new WatchHand(HandType.MINUTES, HandStyle.CENTRIC, centerX, centerY, (int)minLength)
{
Paint = outerMinP
};
minHand.DrawHand(canvas, _calendar);
// Draw the outline hour hand:
var outerHourP = WatchFaceFactory.GetMinuteHand(Color.White, false);
outerHourP.StrokeWidth = hourPaint.StrokeWidth + 4;
hrHand = new WatchHand(HandType.HOURS, HandStyle.CENTRIC, centerX, centerY, (int)hrLength)
{
Paint = outerHourP
};
hrHand.DrawHand(canvas, _calendar);
// Draw the minute hand:
var innerMinPaint = WatchFaceFactory.GetMinuteHand(Color.Black, false);
minHand = new WatchHand(HandType.MINUTES, HandStyle.CENTRIC, centerX, centerY, (int)minLength)
{
Paint = innerMinPaint
};
minHand.DrawHand(canvas, _calendar);
// Draw the hour hand:
var innerHourP = WatchFaceFactory.GetHourHand(Color.Black, false);
hrHand = new WatchHand(HandType.HOURS, HandStyle.CENTRIC, centerX, centerY, (int)hrLength)
{
Paint = innerHourP
};
hrHand.DrawHand(canvas, _calendar);
}
}
/// <summary>
/// Called to draw the watch face
/// To achieve a high frame rate, which results in smooth animations, no intense computations should happen in onDraw
/// </summary>
/// <param name="canvas"></param>
/// <param name="bounds"></param>
public override void OnDraw(Canvas canvas, Rect bounds)
{
// refresh calendar
_calendar = Java.Util.Calendar.GetInstance(Java.Util.TimeZone.Default);
// check the time to see how long this drawing is going to take
long frameStartTimeMs = SystemClock.ElapsedRealtime();
// Determine the bounds of the drawing surface:
var width = bounds.Width();
var height = bounds.Height();
// Determine the center of the drawing surface:
_centerX = width / 2.0f;
_centerY = height / 2.0f;
// set a default background color
canvas.DrawColor(Color.Black);
// canvas.DrawBitmap(_backgroundScaledBitmap, 0, 0, _facePaint);
// draw the face ticks (if not in ambient mode)
_facePaint.Alpha = IsInAmbientMode ? 100 : 255;
var bgToDraw = IsInAmbientMode ? _aodBackgroundScaledBitmap : _backgroundScaledBitmap;
canvas.DrawBitmap(bgToDraw, 0, 0, _facePaint);
if (!IsInAmbientMode)
{
// Draw the hour ticks:
var hticks = new WatchTicks(_centerX, _centerY, 20, 5, -1)
{
TickPaint = _tickPaint
};
hticks.DrawTicks(canvas, 12); // draw 12 of them.
// Draw the minute ticks:
var mticks = new WatchTicks(_centerX, _centerY, 10, 3, -10)
{
TickPaint = _minuteTickPaint
};
mticks.DrawTicks(canvas, 60, 5); // draw 60 of them, but skip every 5th one [60/12 = 5]
}
// draw something with the date (change the color based on AOD)
var dt = _dateTimeAdapter.Now.Date;
var str = dt.ToString("ddd, dd MMM"); // TUES, 08 APR
_datePaint.Color = ShouldTimerBeRunning() ? Color.Black : Color.Silver; // (change the color based on AOD)
_datePaint.TextSize = _centerY / 10.0f;
var tf = Typeface.Create("Arial", TypefaceStyle.Bold);
_datePaint.SetTypeface(tf);
_datePaint.SetShadowLayer(1.5f, -1f, -1f, Color.Argb(100, 50, 50, 50));
var dateLocation = new Coords(_centerX * 1.10f, _centerY * 1.25f);
canvas.DrawText(str, dateLocation.X, dateLocation.Y, _datePaint);
// draw a central hub (bullet hole?)
var bhW = (int)(width / 4.0f);
var bhH = (int)(height / 4.0f);
var bhX = _centerX - bhW / 2.0f;
var bhY = _centerY - bhH / 2.0f;
if (_hubScaledBitmap == null)
{
_hubScaledBitmap = Bitmap.CreateScaledBitmap(_hubBitmap, bhW, bhH, true /* filter */);
}
canvas.DrawBitmap(_hubScaledBitmap, bhX, bhY, null);
// set these lengths in the OnSurfaceChanged
//var minLength = centerX - 40;
//var hrLength = centerX - 80;
if (!IsInAmbientMode)
{
// Draw the second hand only in interactive mode:
_secHand = new WatchHand(HandType.SECONDS, HandStyle.CENTRIC, _centerX, _centerY, (int)_secLength)
{
paint = _secondPaint
};
_secHand.DrawHand(canvas, _calendar);
// draw the millisecond tick hand - have to include padding (from outside edge, as neg. in pixels)
var milLength = 10;
var milPad = -10;
_milHand = new WatchHand(HandType.MILLISECONDS, HandStyle.OUTSIDE, _centerX, _centerY, milLength,
milPad)
{
paint = _secondPaint
};
_milHand.DrawHand(canvas, _calendar);
// Draw the minute hand:
_minHand = new WatchHand(HandType.MINUTES, HandStyle.CENTRIC, _centerX, _centerY, (int)_minLength)
{
paint = _minutePaint
};
_minHand.DrawHand(canvas, _calendar, HAND_END_CAP_RADIUS);
// Draw the hour hand:
_hrHand = new WatchHand(HandType.HOURS, HandStyle.CENTRIC, _centerX, _centerY, (int)_hrLength)
{
paint = _hourPaint
};
_hrHand.DrawHand(canvas, _calendar);
}
else
{
// Draw the outline minute hand:
var outerMinP = WatchFaceFactory.GetMinuteHand(Color.White, false);
outerMinP.StrokeWidth = _minutePaint.StrokeWidth + 4;
_minHand = new WatchHand(HandType.MINUTES, HandStyle.CENTRIC, _centerX, _centerY, (int)_minLength)
{
paint = outerMinP
};
_minHand.DrawHand(canvas, _calendar);
// Draw the outline hour hand:
var outerHourP = WatchFaceFactory.GetMinuteHand(Color.White, false);
outerHourP.StrokeWidth = _hourPaint.StrokeWidth + 4;
_hrHand = new WatchHand(HandType.HOURS, HandStyle.CENTRIC, _centerX, _centerY, (int)_hrLength)
{
paint = outerHourP
};
_hrHand.DrawHand(canvas, _calendar);
// Draw the minute hand:
var innerMinPaint = WatchFaceFactory.GetMinuteHand(Color.Black, false);
_minHand = new WatchHand(HandType.MINUTES, HandStyle.CENTRIC, _centerX, _centerY, (int)_minLength)
{
paint = innerMinPaint
};
_minHand.DrawHand(canvas, _calendar);
// Draw the hour hand:
var innerHourP = WatchFaceFactory.GetHourHand(Color.Black, false);
_hrHand = new WatchHand(HandType.HOURS, HandStyle.CENTRIC, _centerX, _centerY, (int)_hrLength)
{
paint = innerHourP
};
_hrHand.DrawHand(canvas, _calendar);
}
// kick off the timer again... maybe
if (ShouldTimerBeRunning())
{
// recheck the time, and if drawing is taking too long, skip the next tick
long delayMs = SystemClock.ElapsedRealtime() - frameStartTimeMs;
if (delayMs > INTERACTIVE_UPDATE_RATE_MS)
{
// This scenario occurs when drawing all of the components takes longer than an actual frame.
// It may be helpful to log how many times this happens, so you can fix it when it occurs.
if (Log.IsLoggable(Tag, LogPriority.Warn))
{
Log.Warn(Tag, "OnDraw: long running draw (delayMs=" + delayMs + " > updateRateMs=" + INTERACTIVE_UPDATE_RATE_MS + ")");
}
// In general, you don't want to redraw immediately, but on the next appropriate frame (else block below).
delayMs = 0;
}
else
{
// Sets the delay as close as possible to the intended framerate.
// Note that the recommended interactive update rate is 1 frame per second.
// However, if you want to include the sweeping hand gesture, set the
// interactive update rate up to 30 frames per second.
delayMs = INTERACTIVE_UPDATE_RATE_MS - delayMs;
}
_mUpdateTimeHandler.SendEmptyMessageDelayed(MSG_UPDATE_TIME, delayMs);
}
}