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This commit is contained in:
Luan Nico
2020-09-27 15:15:58 -04:00
parent a6023f4cfe
commit 3c48aa345d
3 changed files with 4 additions and 104 deletions
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4
doc/examples/gestures/lib/main_mouse_movement.dart
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@ -46,8 +46,8 @@ class MyGame extends Game with MouseMovementDetector {
_onTarget = _toRect().contains(target.toOffset()); _onTarget = _toRect().contains(target.toOffset());
if (!_onTarget) { if (!_onTarget) {
final dir = (target - position).normalize(); final dir = (target - position).normalized();
position += dir * (SPEED * dt); position += (SPEED * dt) * dir;
} }
} }
} }

4
doc/examples/gestures/lib/main_scroll.dart
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@ -37,8 +37,8 @@ class MyGame extends Game with ScrollDetector {
@override @override
void update(double dt) { void update(double dt) {
if (target != null) { if (target != null) {
final dir = (target - position).normalize(); final dir = (target - position).normalized();
position += dir * (SPEED * dt); position += (SPEED * dt) * dir;
} }
} }
} }

100
lib/components/composed_component.dart
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@ -1,100 +0,0 @@
import 'dart:ui';
import 'package:ordered_set/comparing.dart';
import 'package:ordered_set/ordered_set.dart';
import '../game/base_game.dart';
import 'component.dart';
import 'mixins/has_game_ref.dart';
import 'mixins/resizable.dart';
import 'mixins/tapable.dart';
/// A mixin that helps you to make a `Component` wraps other components. It is useful to group visual components through a hierarchy.
/// When implemented, makes every item in its `components` collection field be updated and rendered with the same conditions.
///
/// Example of usage, where visibility of two components are handled by a wrapper:
///
/// ```dart
/// class GameOverPanel extends PositionComponent with Resizable, ComposedComponent {
/// bool visible = false;
///
/// GameOverText gameOverText;
/// GameOverButton gameOverButton;
///
/// GameOverPanel(Image spriteImage) : super() {
/// gameOverText = GameOverText(spriteImage); // GameOverText is a Component
/// gameOverButton = GameOverButton(spriteImage); // GameOverRestart is a SpriteComponent
///
/// components..add(gameOverText)..add(gameOverButton);
/// }
///
/// @override
/// void render(Canvas canvas) {
/// if (visible) {
/// super.render(canvas);
/// } // If not, neither of its `components` will be rendered
/// }
/// }
/// ```
///
mixin ComposedComponent on Component, HasGameRef, Tapable {
OrderedSet<Component> components =
OrderedSet(Comparing.on((c) => c.priority()));
final List<Component> _removeLater = [];
@override
void render(Canvas canvas) {
canvas.save();
components.forEach((comp) => _renderComponent(canvas, comp));
canvas.restore();
}
void _renderComponent(Canvas canvas, Component c) {
if (!c.loaded()) {
return;
}
c.render(canvas);
canvas.restore();
canvas.save();
}
@override
void update(double t) {
_removeLater.forEach((c) => components.remove(c));
_removeLater.clear();
components.forEach((c) => c.update(t));
components.removeWhere((c) => c.destroy());
}
void add(Component c) {
if (gameRef is BaseGame) {
(gameRef as BaseGame).preAdd(c);
}
components.add(c);
}
void markToRemove(Component component) {
_removeLater.add(component);
}
// this is an important override for the Tapable mixin
@override
Iterable<Tapable> tapableChildren() => _findT<Tapable>();
// this is an important override for the Resizable mixin
Iterable<Resizable> resizableChildren() => _findT<Resizable>();
// Finds all children of type T, recursively
Iterable<T> _findT<T>() => components.expand((c) {
final List<T> r = [];
if (c is T) {
r.add(c as T);
}
if (c is ComposedComponent) {
r.addAll(c._findT<T>());
}
return r;
}).cast();
}