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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'package:flutter_test/flutter_test.dart';
import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'gesture_tester.dart';
void main() {
setUp(ensureGestureBinding);
testGesture('Should recognize pan', (GestureTester tester) {
final PanGestureRecognizer pan = PanGestureRecognizer();
final TapGestureRecognizer tap = TapGestureRecognizer();
bool didStartPan = false;
pan.onStart = (_) {
didStartPan = true;
};
Offset updatedScrollDelta;
pan.onUpdate = (DragUpdateDetails details) {
updatedScrollDelta = details.delta;
};
bool didEndPan = false;
pan.onEnd = (DragEndDetails details) {
didEndPan = true;
};
bool didTap = false;
tap.onTap = () {
didTap = true;
};
final TestPointer pointer = TestPointer(5);
final PointerDownEvent down = pointer.down(const Offset(10.0, 10.0));
pan.addPointer(down);
tap.addPointer(down);
tester.closeArena(5);
expect(didStartPan, isFalse);
expect(updatedScrollDelta, isNull);
expect(didEndPan, isFalse);
expect(didTap, isFalse);
tester.route(down);
expect(didStartPan, isFalse);
expect(updatedScrollDelta, isNull);
expect(didEndPan, isFalse);
expect(didTap, isFalse);
// touch should give up when it hits kTouchSlop, which was 18.0 when this test was last updated.
tester.route(pointer.move(const Offset(20.0, 20.0))); // moved 10 horizontally and 10 vertically which is 14 total
expect(didStartPan, isFalse); // 14 < 18
tester.route(pointer.move(const Offset(20.0, 30.0))); // moved 10 horizontally and 20 vertically which is 22 total
expect(didStartPan, isTrue); // 22 > 18
didStartPan = false;
expect(updatedScrollDelta, null);
expect(didEndPan, isFalse);
expect(didTap, isFalse);
tester.route(pointer.move(const Offset(20.0, 25.0)));
expect(didStartPan, isFalse);
expect(updatedScrollDelta, const Offset(0.0, -5.0));
updatedScrollDelta = null;
expect(didEndPan, isFalse);
expect(didTap, isFalse);
tester.route(pointer.up());
expect(didStartPan, isFalse);
expect(updatedScrollDelta, isNull);
expect(didEndPan, isTrue);
didEndPan = false;
expect(didTap, isFalse);
pan.dispose();
tap.dispose();
});
testGesture('Should recognize drag', (GestureTester tester) {
final HorizontalDragGestureRecognizer drag = HorizontalDragGestureRecognizer() ..dragStartBehavior = DragStartBehavior.down;
bool didStartDrag = false;
drag.onStart = (_) {
didStartDrag = true;
};
double updatedDelta;
drag.onUpdate = (DragUpdateDetails details) {
updatedDelta = details.primaryDelta;
};
bool didEndDrag = false;
drag.onEnd = (DragEndDetails details) {
didEndDrag = true;
};
final TestPointer pointer = TestPointer(5);
final PointerDownEvent down = pointer.down(const Offset(10.0, 10.0));
drag.addPointer(down);
tester.closeArena(5);
expect(didStartDrag, isFalse);
expect(updatedDelta, isNull);
expect(didEndDrag, isFalse);
tester.route(down);
expect(didStartDrag, isTrue);
expect(updatedDelta, isNull);
expect(didEndDrag, isFalse);
tester.route(pointer.move(const Offset(20.0, 25.0)));
expect(didStartDrag, isTrue);
didStartDrag = false;
expect(updatedDelta, 10.0);
updatedDelta = null;
expect(didEndDrag, isFalse);
tester.route(pointer.move(const Offset(20.0, 25.0)));
expect(didStartDrag, isFalse);
expect(updatedDelta, 0.0);
updatedDelta = null;
expect(didEndDrag, isFalse);
tester.route(pointer.up());
expect(didStartDrag, isFalse);
expect(updatedDelta, isNull);
expect(didEndDrag, isTrue);
didEndDrag = false;
drag.dispose();
});
testGesture('Should report original timestamps', (GestureTester tester) {
final HorizontalDragGestureRecognizer drag = HorizontalDragGestureRecognizer() ..dragStartBehavior = DragStartBehavior.down;
Duration startTimestamp;
drag.onStart = (DragStartDetails details) {
startTimestamp = details.sourceTimeStamp;
};
Duration updatedTimestamp;
drag.onUpdate = (DragUpdateDetails details) {
updatedTimestamp = details.sourceTimeStamp;
};
final TestPointer pointer = TestPointer(5);
final PointerDownEvent down = pointer.down(const Offset(10.0, 10.0), timeStamp: const Duration(milliseconds: 100));
drag.addPointer(down);
tester.closeArena(5);
expect(startTimestamp, isNull);
tester.route(down);
expect(startTimestamp, const Duration(milliseconds: 100));
tester.route(pointer.move(const Offset(20.0, 25.0), timeStamp: const Duration(milliseconds: 200)));
expect(updatedTimestamp, const Duration(milliseconds: 200));
tester.route(pointer.move(const Offset(20.0, 25.0), timeStamp: const Duration(milliseconds: 300)));
expect(updatedTimestamp, const Duration(milliseconds: 300));
drag.dispose();
});
testGesture('Should report most recent point to onStart by default', (GestureTester tester) {
final HorizontalDragGestureRecognizer drag = HorizontalDragGestureRecognizer();
final VerticalDragGestureRecognizer competingDrag = VerticalDragGestureRecognizer();
Offset positionAtOnStart;
drag.onStart = (DragStartDetails details) {
positionAtOnStart = details.globalPosition;
};
final TestPointer pointer = TestPointer(5);
final PointerDownEvent down = pointer.down(const Offset(10.0, 10.0));
drag.addPointer(down);
competingDrag.addPointer(down);
tester.closeArena(5);
tester.route(down);
tester.route(pointer.move(const Offset(30.0, 0.0)));
drag.dispose();
competingDrag.dispose();
expect(positionAtOnStart, const Offset(30.0, 00.0));
});
testGesture('Should report most recent point to onStart with a start configuration', (GestureTester tester) {
final HorizontalDragGestureRecognizer drag =
HorizontalDragGestureRecognizer();
final VerticalDragGestureRecognizer competingDrag = VerticalDragGestureRecognizer();
Offset positionAtOnStart;
drag.onStart = (DragStartDetails details) {
positionAtOnStart = details.globalPosition;
};
Offset updateOffset;
drag.onUpdate = (DragUpdateDetails details) {
updateOffset = details.globalPosition;
};
final TestPointer pointer = TestPointer(5);
final PointerDownEvent down = pointer.down(const Offset(10.0, 10.0));
drag.addPointer(down);
competingDrag.addPointer(down);
tester.closeArena(5);
tester.route(down);
tester.route(pointer.move(const Offset(30.0, 0.0)));
drag.dispose();
competingDrag.dispose();
expect(positionAtOnStart, const Offset(30.0, 0.0));
expect(updateOffset, null);
});
testGesture('Should report initial down point to onStart with a down configuration', (GestureTester tester) {
final HorizontalDragGestureRecognizer drag =
HorizontalDragGestureRecognizer() ..dragStartBehavior = DragStartBehavior.down;
final VerticalDragGestureRecognizer competingDrag = VerticalDragGestureRecognizer() ..dragStartBehavior = DragStartBehavior.down;
Offset positionAtOnStart;
drag.onStart = (DragStartDetails details) {
positionAtOnStart = details.globalPosition;
};
Offset updateOffset;
Offset updateDelta;
drag.onUpdate = (DragUpdateDetails details) {
updateOffset = details.globalPosition;
updateDelta = details.delta;
};
final TestPointer pointer = TestPointer(5);
final PointerDownEvent down = pointer.down(const Offset(10.0, 10.0));
drag.addPointer(down);
competingDrag.addPointer(down);
tester.closeArena(5);
tester.route(down);
tester.route(pointer.move(const Offset(30.0, 0.0)));
drag.dispose();
competingDrag.dispose();
expect(positionAtOnStart, const Offset(10.0, 10.0));
// The drag is horizontal so we're going to ignore the vertical delta position
// when calculating the new global position.
expect(updateOffset, const Offset(30.0, 10.0));
expect(updateDelta, const Offset(20.0, 0.0));
});
testGesture('Drag with multiple pointers in down behavior', (GestureTester tester) {
final HorizontalDragGestureRecognizer drag1 =
HorizontalDragGestureRecognizer() ..dragStartBehavior = DragStartBehavior.down;
final VerticalDragGestureRecognizer drag2 =
VerticalDragGestureRecognizer() ..dragStartBehavior = DragStartBehavior.down;
final List<String> log = <String>[];
drag1.onDown = (_) { log.add('drag1-down'); };
drag1.onStart = (_) { log.add('drag1-start'); };
drag1.onUpdate = (_) { log.add('drag1-update'); };
drag1.onEnd = (_) { log.add('drag1-end'); };
drag1.onCancel = () { log.add('drag1-cancel'); };
drag2.onDown = (_) { log.add('drag2-down'); };
drag2.onStart = (_) { log.add('drag2-start'); };
drag2.onUpdate = (_) { log.add('drag2-update'); };
drag2.onEnd = (_) { log.add('drag2-end'); };
drag2.onCancel = () { log.add('drag2-cancel'); };
final TestPointer pointer5 = TestPointer(5);
final PointerDownEvent down5 = pointer5.down(const Offset(10.0, 10.0));
drag1.addPointer(down5);
drag2.addPointer(down5);
tester.closeArena(5);
tester.route(down5);
log.add('-a');
tester.route(pointer5.move(const Offset(100.0, 0.0)));
log.add('-b');
tester.route(pointer5.move(const Offset(50.0, 50.0)));
log.add('-c');
final TestPointer pointer6 = TestPointer(6);
final PointerDownEvent down6 = pointer6.down(const Offset(20.0, 20.0));
drag1.addPointer(down6);
drag2.addPointer(down6);
tester.closeArena(6);
tester.route(down6);
log.add('-d');
tester.route(pointer5.move(const Offset(0.0, 100.0)));
log.add('-e');
tester.route(pointer5.move(const Offset(70.0, 70.0)));
log.add('-f');
tester.route(pointer5.up());
tester.route(pointer6.up());
drag1.dispose();
drag2.dispose();
expect(log, <String>[
'drag1-down',
'drag2-down',
'-a',
'drag2-cancel',
'drag1-start',
'drag1-update',
'-b',
'drag1-update',
'-c',
'drag2-down',
'drag2-cancel',
'-d',
'drag1-update',
'-e',
'drag1-update',
'-f',
'drag1-end'
]);
});
testGesture('Clamp max velocity', (GestureTester tester) {
final HorizontalDragGestureRecognizer drag = HorizontalDragGestureRecognizer() ..dragStartBehavior = DragStartBehavior.down;
Velocity velocity;
double primaryVelocity;
drag.onEnd = (DragEndDetails details) {
velocity = details.velocity;
primaryVelocity = details.primaryVelocity;
};
final TestPointer pointer = TestPointer(5);
final PointerDownEvent down = pointer.down(const Offset(10.0, 25.0), timeStamp: const Duration(milliseconds: 10));
drag.addPointer(down);
tester.closeArena(5);
tester.route(down);
tester.route(pointer.move(const Offset(20.0, 25.0), timeStamp: const Duration(milliseconds: 10)));
tester.route(pointer.move(const Offset(30.0, 25.0), timeStamp: const Duration(milliseconds: 11)));
tester.route(pointer.move(const Offset(40.0, 25.0), timeStamp: const Duration(milliseconds: 12)));
tester.route(pointer.move(const Offset(50.0, 25.0), timeStamp: const Duration(milliseconds: 13)));
tester.route(pointer.move(const Offset(60.0, 25.0), timeStamp: const Duration(milliseconds: 14)));
tester.route(pointer.move(const Offset(70.0, 25.0), timeStamp: const Duration(milliseconds: 15)));
tester.route(pointer.move(const Offset(80.0, 25.0), timeStamp: const Duration(milliseconds: 16)));
tester.route(pointer.move(const Offset(90.0, 25.0), timeStamp: const Duration(milliseconds: 17)));
tester.route(pointer.move(const Offset(100.0, 25.0), timeStamp: const Duration(milliseconds: 18)));
tester.route(pointer.move(const Offset(110.0, 25.0), timeStamp: const Duration(milliseconds: 19)));
tester.route(pointer.move(const Offset(120.0, 25.0), timeStamp: const Duration(milliseconds: 20)));
tester.route(pointer.up(timeStamp: const Duration(milliseconds: 20)));
expect(velocity.pixelsPerSecond.dx, inInclusiveRange(0.99 * kMaxFlingVelocity, kMaxFlingVelocity));
expect(velocity.pixelsPerSecond.dy, moreOrLessEquals(0.0));
expect(primaryVelocity, velocity.pixelsPerSecond.dx);
drag.dispose();
});
testGesture('Synthesized pointer events are ignored for velocity tracking', (GestureTester tester) {
final HorizontalDragGestureRecognizer drag = HorizontalDragGestureRecognizer() ..dragStartBehavior = DragStartBehavior.down;
Velocity velocity;
drag.onEnd = (DragEndDetails details) {
velocity = details.velocity;
};
final TestPointer pointer = TestPointer(1);
final PointerDownEvent down = pointer.down(const Offset(10.0, 25.0), timeStamp: const Duration(milliseconds: 10));
drag.addPointer(down);
tester.closeArena(1);
tester.route(down);
tester.route(pointer.move(const Offset(20.0, 25.0), timeStamp: const Duration(milliseconds: 20)));
tester.route(pointer.move(const Offset(30.0, 25.0), timeStamp: const Duration(milliseconds: 30)));
tester.route(pointer.move(const Offset(40.0, 25.0), timeStamp: const Duration(milliseconds: 40)));
tester.route(pointer.move(const Offset(50.0, 25.0), timeStamp: const Duration(milliseconds: 50)));
tester.route(const PointerMoveEvent(
pointer: 1,
// Simulate a small synthesized wobble which would have slowed down the
// horizontal velocity from 1 px/ms and introduced a slight vertical velocity.
position: Offset(51.0, 26.0),
timeStamp: Duration(milliseconds: 60),
synthesized: true,
));
tester.route(pointer.up(timeStamp: const Duration(milliseconds: 70)));
expect(velocity.pixelsPerSecond.dx, moreOrLessEquals(1000.0));
expect(velocity.pixelsPerSecond.dy, moreOrLessEquals(0.0));
drag.dispose();
});
/// Checks that quick flick gestures with 1 down, 2 move and 1 up pointer
/// events still have a velocity
testGesture('Quick flicks have velocity', (GestureTester tester) {
final HorizontalDragGestureRecognizer drag = HorizontalDragGestureRecognizer() ..dragStartBehavior = DragStartBehavior.down;
Velocity velocity;
drag.onEnd = (DragEndDetails details) {
velocity = details.velocity;
};
final TestPointer pointer = TestPointer(1);
final PointerDownEvent down = pointer.down(const Offset(10.0, 25.0), timeStamp: const Duration(milliseconds: 10));
drag.addPointer(down);
tester.closeArena(1);
tester.route(down);
tester.route(pointer.move(const Offset(20.0, 25.0), timeStamp: const Duration(milliseconds: 20)));
tester.route(pointer.move(const Offset(30.0, 25.0), timeStamp: const Duration(milliseconds: 30)));
tester.route(pointer.up(timeStamp: const Duration(milliseconds: 40)));
// 3 events moving by 10px every 10ms = 1000px/s.
expect(velocity.pixelsPerSecond.dx, moreOrLessEquals(1000.0));
expect(velocity.pixelsPerSecond.dy, moreOrLessEquals(0.0));
drag.dispose();
});
testGesture('Drag details', (GestureTester tester) {
expect(DragDownDetails(), hasOneLineDescription);
expect(DragStartDetails(), hasOneLineDescription);
expect(DragUpdateDetails(globalPosition: Offset.zero), hasOneLineDescription);
expect(DragEndDetails(), hasOneLineDescription);
});
testGesture('Should recognize drag', (GestureTester tester) {
final HorizontalDragGestureRecognizer drag = HorizontalDragGestureRecognizer() ..dragStartBehavior = DragStartBehavior.down;
bool didStartDrag = false;
drag.onStart = (_) {
didStartDrag = true;
};
Offset updateDelta;
double updatePrimaryDelta;
drag.onUpdate = (DragUpdateDetails details) {
updateDelta = details.delta;
updatePrimaryDelta = details.primaryDelta;
};
bool didEndDrag = false;
drag.onEnd = (DragEndDetails details) {
didEndDrag = true;
};
final TestPointer pointer = TestPointer(5);
final PointerDownEvent down = pointer.down(const Offset(10.0, 10.0));
drag.addPointer(down);
tester.closeArena(5);
expect(didStartDrag, isFalse);
expect(updateDelta, isNull);
expect(updatePrimaryDelta, isNull);
expect(didEndDrag, isFalse);
tester.route(down);
expect(didStartDrag, isTrue);
expect(updateDelta, isNull);
expect(updatePrimaryDelta, isNull);
expect(didEndDrag, isFalse);
didStartDrag = false;
tester.route(pointer.move(const Offset(20.0, 25.0)));
expect(didStartDrag, isFalse);
expect(updateDelta, const Offset(10.0, 0.0));
expect(updatePrimaryDelta, 10.0);
expect(didEndDrag, isFalse);
updateDelta = null;
updatePrimaryDelta = null;
tester.route(pointer.move(const Offset(20.0, 25.0)));
expect(didStartDrag, isFalse);
expect(updateDelta, const Offset(0.0, 0.0));
expect(updatePrimaryDelta, 0.0);
expect(didEndDrag, isFalse);
updateDelta = null;
updatePrimaryDelta = null;
tester.route(pointer.up());
expect(didStartDrag, isFalse);
expect(updateDelta, isNull);
expect(updatePrimaryDelta, isNull);
expect(didEndDrag, isTrue);
didEndDrag = false;
drag.dispose();
});
testGesture('Should recognize drag', (GestureTester tester) {
final HorizontalDragGestureRecognizer drag = HorizontalDragGestureRecognizer() ..dragStartBehavior = DragStartBehavior.down;
Offset latestGlobalPosition;
drag.onStart = (DragStartDetails details) {
latestGlobalPosition = details.globalPosition;
};
Offset latestDelta;
drag.onUpdate = (DragUpdateDetails details) {
latestGlobalPosition = details.globalPosition;
latestDelta = details.delta;
};
final TestPointer pointer = TestPointer(5);
final PointerDownEvent down = pointer.down(const Offset(10.0, 10.0));
drag.addPointer(down);
tester.closeArena(5);
tester.route(down);
expect(latestGlobalPosition, const Offset(10.0, 10.0));
expect(latestDelta, isNull);
tester.route(pointer.move(const Offset(20.0, 25.0)));
expect(latestGlobalPosition, const Offset(20.0, 25.0));
expect(latestDelta, const Offset(10.0, 0.0));
tester.route(pointer.move(const Offset(0.0, 45.0)));
expect(latestGlobalPosition, const Offset(0.0, 45.0));
expect(latestDelta, const Offset(-20.0, 0.0));
tester.route(pointer.up());
drag.dispose();
});
}