private void drawCircle(Canvas canvas, BatteryTracker tracker, float textX, RectF drawRect) {
boolean unknownStatus = tracker.status == BatteryManager.BATTERY_STATUS_UNKNOWN;
int animOffset = tracker.shouldIndicateCharging() ? mAnimOffset : 0;
int level = tracker.level;
Paint paint;
if (unknownStatus) {
paint = mBackPaint;
level = 100; // Draw all the circle;
} else {
paint = mFrontPaint;
paint.setColor(getColorForLevel(level));
if (tracker.status == BatteryManager.BATTERY_STATUS_FULL) {
level = 100;
}
}
// draw thin gray ring first
canvas.drawArc(drawRect, 270, 360, false, mBackPaint);
// draw colored arc representing charge level
canvas.drawArc(drawRect, 270 + animOffset, 3.6f * level, false, paint);
// if chosen by options, draw percentage text in the middle
// always skip percentage when 100, so layout doesnt break
if (unknownStatus) {
mTextPaint.setColor(paint.getColor());
canvas.drawText("?", textX, mTextY, mTextPaint);
} else if (tracker.shouldIndicateCharging() && (!mShowPercent || level == 100)) {
// draw the bolt
final float bl = (int) (drawRect.left + drawRect.width() / 3.2f);
final float bt = (int) (drawRect.top + drawRect.height() / 4f);
final float br = (int) (drawRect.right - drawRect.width() / 5.2f);
final float bb = (int) (drawRect.bottom - drawRect.height() / 8f);
if (mBoltFrame.left != bl
|| mBoltFrame.top != bt
|| mBoltFrame.right != br
|| mBoltFrame.bottom != bb) {
mBoltFrame.set(bl, bt, br, bb);
mBoltPath.reset();
mBoltPath.moveTo(
mBoltFrame.left + mBoltPoints[0] * mBoltFrame.width(),
mBoltFrame.top + mBoltPoints[1] * mBoltFrame.height());
for (int i = 2; i < mBoltPoints.length; i += 2) {
mBoltPath.lineTo(
mBoltFrame.left + mBoltPoints[i] * mBoltFrame.width(),
mBoltFrame.top + mBoltPoints[i + 1] * mBoltFrame.height());
}
mBoltPath.lineTo(
mBoltFrame.left + mBoltPoints[0] * mBoltFrame.width(),
mBoltFrame.top + mBoltPoints[1] * mBoltFrame.height());
}
canvas.drawPath(mBoltPath, mBoltPaint);
} else if (level < 100 && mShowPercent) {
mTextPaint.setColor(paint.getColor());
canvas.drawText(Integer.toString(level), textX, mTextY, mTextPaint);
}
}
private void updateChargeAnimation(BatteryTracker tracker) {
if (!tracker.shouldIndicateCharging()) {
resetChargeAnimation();
return;
}
mIsAnimating = true;
if (mAnimOffset > 100) {
mAnimOffset = 0;
} else {
mAnimOffset += 5;
}
mHandler.removeCallbacks(mInvalidate);
mHandler.postDelayed(mInvalidate, 100);
}
@Override
public void onDraw(Canvas c, BatteryTracker tracker) {
if (mDisposed) return;
int level = tracker.level;
boolean plugged = tracker.plugged;
boolean unknownStatus = tracker.status == BatteryManager.BATTERY_STATUS_UNKNOWN;
if (mOldLevel != level || mOldPlugged != plugged) {
mOldLevel = level;
mOldPlugged = plugged;
postInvalidate();
requestLayout();
return;
}
if (unknownStatus) {
c.drawText("?", mTextX, mTextY, mBackPaint);
Resources res = mContext.getResources();
mFrontPaint.setColor(res.getColor(R.color.batterymeter_frame_color));
drawWithoutLevel(c, "?");
return;
}
mFrontPaint.setColor(getColorForLevel(level));
// Is plugged? Then use the animation status
if (tracker.shouldIndicateCharging() && level != 100) {
updateChargeAnimation(tracker);
drawWithLevel(c, tracker, mAnimOffset, getLevel(level));
} else {
resetChargeAnimation();
if (DRAW_LEVEL) {
drawWithLevel(c, tracker, level, getLevel(level));
} else {
drawWithoutLevel(c, getLevel(level));
}
}
}
/**
* updates the animation counter cares for timed callbacks to continue animation cycles uses
* mInvalidate for delayed invalidate() callbacks
*/
private void updateChargeAnim(BatteryTracker tracker) {
if (!tracker.shouldIndicateCharging()
|| tracker.status == BatteryManager.BATTERY_STATUS_FULL) {
if (mIsAnimating) {
mIsAnimating = false;
mAnimOffset = 0;
mHandler.removeCallbacks(mInvalidate);
}
return;
}
mIsAnimating = true;
if (mAnimOffset > 360) {
mAnimOffset = 0;
} else {
mAnimOffset += 3;
}
mHandler.removeCallbacks(mInvalidate);
mHandler.postDelayed(mInvalidate, 50);
}
@Override
public void onDraw(Canvas c, BatteryTracker tracker) {
if (mDisposed) return;
final int level = tracker.level;
if (level == BatteryTracker.UNKNOWN_LEVEL) return;
float drawFrac = (float) level / 100f;
final int pt = getPaddingTop() + (mHorizontal ? (int) (mHeight * 0.20f) : 0);
final int pl = getPaddingLeft();
final int pr = getPaddingRight();
final int pb = getPaddingBottom();
int height = mHeight - pt - pb;
int width = mWidth - pl - pr;
mButtonHeight = (int) ((mHorizontal ? width : height) * 0.12f);
mFrame.set(0, 0, width, height);
mFrame.offset(pl, pt);
if (mHorizontal) {
mButtonFrame.set(
/*cover frame border of intersecting area*/
width - (mButtonHeight + 5) - mFrame.left,
mFrame.top + height * 0.25f,
mFrame.right,
mFrame.bottom - height * 0.25f);
mButtonFrame.top += SUBPIXEL;
mButtonFrame.bottom -= SUBPIXEL;
mButtonFrame.right -= SUBPIXEL;
} else {
mButtonFrame.set(
mFrame.left + width * 0.25f,
mFrame.top,
mFrame.right - width * 0.25f,
mFrame.top + mButtonHeight + 5 /*cover frame border of intersecting area*/);
mButtonFrame.top += SUBPIXEL;
mButtonFrame.left += SUBPIXEL;
mButtonFrame.right -= SUBPIXEL;
}
if (mHorizontal) {
mFrame.right -= mButtonHeight;
} else {
mFrame.top += mButtonHeight;
}
mFrame.left += SUBPIXEL;
mFrame.top += SUBPIXEL;
mFrame.right -= SUBPIXEL;
mFrame.bottom -= SUBPIXEL;
// first, draw the battery shape
c.drawRect(mFrame, mFramePaint);
// fill 'er up
final int color = tracker.plugged ? mChargeColor : getColorForLevel(level);
mBatteryPaint.setColor(color);
if (level >= FULL) {
drawFrac = 1f;
} else if (level <= EMPTY) {
drawFrac = 0f;
}
c.drawRect(mButtonFrame, drawFrac == 1f ? mBatteryPaint : mFramePaint);
mClipFrame.set(mFrame);
if (mHorizontal) {
mClipFrame.right -= (mFrame.width() * (1f - drawFrac));
} else {
mClipFrame.top += (mFrame.height() * (1f - drawFrac));
}
c.save(Canvas.CLIP_SAVE_FLAG);
c.clipRect(mClipFrame);
c.drawRect(mFrame, mBatteryPaint);
c.restore();
if (tracker.shouldIndicateCharging()) {
// draw the bolt
final float bl = (int) (mFrame.left + mFrame.width() / (mHorizontal ? 9f : 4.5f));
final float bt = (int) (mFrame.top + mFrame.height() / (mHorizontal ? 4.5f : 6f));
final float br = (int) (mFrame.right - mFrame.width() / (mHorizontal ? 6f : 7f));
final float bb = (int) (mFrame.bottom - mFrame.height() / (mHorizontal ? 7f : 10f));
if (mBoltFrame.left != bl
|| mBoltFrame.top != bt
|| mBoltFrame.right != br
|| mBoltFrame.bottom != bb) {
mBoltFrame.set(bl, bt, br, bb);
mBoltPath.reset();
mBoltPath.moveTo(
mBoltFrame.left + mBoltPoints[0] * mBoltFrame.width(),
mBoltFrame.top + mBoltPoints[1] * mBoltFrame.height());
for (int i = 2; i < mBoltPoints.length; i += 2) {
mBoltPath.lineTo(
mBoltFrame.left + mBoltPoints[i] * mBoltFrame.width(),
mBoltFrame.top + mBoltPoints[i + 1] * mBoltFrame.height());
}
mBoltPath.lineTo(
mBoltFrame.left + mBoltPoints[0] * mBoltFrame.width(),
mBoltFrame.top + mBoltPoints[1] * mBoltFrame.height());
}
c.drawPath(mBoltPath, mBoltPaint);
} else if (level <= EMPTY) {
final float x = mHorizontal ? pt + (height * 0.5f) : mWidth * 0.5f;
final float y =
mHorizontal
? (mWidth - mWarningTextHeight) * -0.48f
: (mHeight + mWarningTextHeight) * 0.48f;
if (mHorizontal) {
c.save();
c.rotate(90);
}
c.drawText(mWarningString, x, y, mWarningTextPaint);
if (mHorizontal) {
c.restore();
}
} else if (mShowPercent && !(tracker.level == 100 && !SHOW_100_PERCENT)) {
final float full = mHorizontal ? 0.60f : 0.45f;
final float nofull = mHorizontal ? 0.75f : 0.6f;
final float single = mHorizontal ? 0.86f : 0.75f;
mTextPaint.setTextSize(
height * (SINGLE_DIGIT_PERCENT ? single : (tracker.level == 100 ? full : nofull)));
mTextHeight = -mTextPaint.getFontMetrics().ascent;
final String str = String.valueOf(SINGLE_DIGIT_PERCENT ? (level / 10) : level);
final float x = mWidth * 0.5f;
final float y = pt + (height + mTextHeight) * 0.47f;
c.drawText(str, x, y, mTextPaint);
}
}