@Override
public void onDraw(Canvas canvas) {
final boolean keyboardChanged = mKeyboardChanged;
super.onDraw(canvas);
// switching animation
if (mAnimationLevel != AnimationsLevel.None && keyboardChanged && (mInAnimation != null)) {
startAnimation(mInAnimation);
mInAnimation = null;
}
// text pop out animation
if (mPopOutText != null && mAnimationLevel != AnimationsLevel.None) {
final int maxVerticalTravel = getHeight() / 2;
final long animationDuration = 1200;
final long currentAnimationTime = SystemClock.elapsedRealtime() - mPopOutTime;
if (currentAnimationTime > animationDuration) {
mPopOutText = null;
} else {
final float animationProgress =
((float) currentAnimationTime) / ((float) animationDuration);
final float animationFactoredProgress = getPopOutAnimationInterpolator(animationProgress);
final int y = mPopOutStartPoint.y - (int) (maxVerticalTravel * animationFactoredProgress);
final int x = mPopOutStartPoint.x;
final int alpha = 255 - (int) (255 * animationProgress);
if (FeaturesSet.DEBUG_LOG)
Log.d(
TAG,
"Drawing text popout '"
+ mPopOutText
+ "' at "
+ x
+ ","
+ y
+ " with alpha "
+ alpha
+ ". Animation progress is "
+ animationProgress
+ ", and factor progress is "
+ animationFactoredProgress);
// drawing
setPaintToKeyText(mPaint);
// will disappear over time
mPaint.setAlpha(alpha);
mPaint.setShadowLayer(5, 0, 0, Color.BLACK);
// will grow over time
mPaint.setTextSize(mPaint.getTextSize() * (1.0f + animationFactoredProgress));
canvas.translate(x, y);
canvas.drawText(mPopOutText, 0, mPopOutText.length(), 0, 0, mPaint);
canvas.translate(-x, -y);
// next frame
postInvalidateDelayed(1000 / 50); // doing 50 frames per second;
}
}
}
