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🏷 Backport some code improvements from the null-safety branch (#603)

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This commit is contained in:
Serge Matveenko
2021-01-09 05:25:29 +03:00
committed by GitHub
parent 5b1988ca36
commit 16eaef3bb1
28 changed files with 168 additions and 149 deletions
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20
doc/examples/joystick/lib/player.dart
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@ -25,14 +25,15 @@ class Player extends Component implements JoystickListener {
@override
void render(Canvas canvas) {
if (_rect != null) {
canvas.save();
canvas.translate(_rect.center.dx, _rect.center.dy);
canvas.rotate(radAngle == 0.0 ? 0.0 : radAngle + (pi / 2));
canvas.translate(-_rect.center.dx, -_rect.center.dy);
canvas.drawRect(_rect, _paint);
canvas.restore();
if (_rect == null) {
return;
}
canvas.save();
canvas.translate(_rect.center.dx, _rect.center.dy);
canvas.rotate(radAngle == 0.0 ? 0.0 : radAngle + (pi / 2));
canvas.translate(-_rect.center.dx, -_rect.center.dy);
canvas.drawRect(_rect, _paint);
canvas.restore();
}
@override
@ -79,12 +80,15 @@ class Player extends Component implements JoystickListener {
final double nextX = (currentSpeed * dtUpdate) * cos(radAngle);
final double nextY = (currentSpeed * dtUpdate) * sin(radAngle);
if (_rect == null) {
return;
}
final Offset diffBase = Offset(
_rect.center.dx + nextX,
_rect.center.dy + nextY,
) -
_rect.center;
_rect = _rect.shift(diffBase);
}
}