137 lines
5.0 KiB
Objective-C
137 lines
5.0 KiB
Objective-C
/*************************************************************************/
|
|
/* gl_view_gesture_recognizer.m */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/*************************************************************************/
|
|
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
|
|
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
|
|
/* */
|
|
/* Permission is hereby granted, free of charge, to any person obtaining */
|
|
/* a copy of this software and associated documentation files (the */
|
|
/* "Software"), to deal in the Software without restriction, including */
|
|
/* without limitation the rights to use, copy, modify, merge, publish, */
|
|
/* distribute, sublicense, and/or sell copies of the Software, and to */
|
|
/* permit persons to whom the Software is furnished to do so, subject to */
|
|
/* the following conditions: */
|
|
/* */
|
|
/* The above copyright notice and this permission notice shall be */
|
|
/* included in all copies or substantial portions of the Software. */
|
|
/* */
|
|
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
|
|
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
|
|
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
|
|
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
|
|
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
|
|
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
|
|
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
|
|
/*************************************************************************/
|
|
|
|
#import "gl_view_gesture_recognizer.h"
|
|
|
|
// Using same delay interval that is used for `UIScrollView`
|
|
const NSTimeInterval kGLGestureDelayInterval = 0.150;
|
|
|
|
// Minimum distance for touches to move to fire
|
|
// a delay timer before scheduled time.
|
|
// Should be the low enough to not cause issues with dragging
|
|
// but big enough to allow click to work.
|
|
const CGFloat kGLGestureMovementDistance = 0.5;
|
|
|
|
@implementation GLViewGestureRecognizer
|
|
|
|
- (instancetype)init {
|
|
self = [super init];
|
|
|
|
self.cancelsTouchesInView = YES;
|
|
self.delaysTouchesBegan = YES;
|
|
self.delaysTouchesEnded = YES;
|
|
|
|
return self;
|
|
}
|
|
|
|
- (void)delayTouches:(NSSet *)touches andEvent:(UIEvent *)event {
|
|
[delayTimer fire];
|
|
|
|
delayedTouches = touches;
|
|
delayedEvent = event;
|
|
|
|
delayTimer = [NSTimer scheduledTimerWithTimeInterval:kGLGestureDelayInterval target:self selector:@selector(fireDelayedTouches:) userInfo:nil repeats:NO];
|
|
}
|
|
|
|
- (void)fireDelayedTouches:(id)timer {
|
|
[delayTimer invalidate];
|
|
delayTimer = nil;
|
|
|
|
if (delayedTouches) {
|
|
[self.view touchesBegan:delayedTouches withEvent:delayedEvent];
|
|
}
|
|
|
|
[delayedTouches release];
|
|
delayedTouches = nil;
|
|
delayedEvent = nil;
|
|
}
|
|
|
|
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
|
|
NSSet *cleared = [self copyClearedTouches:touches phase:UITouchPhaseBegan];
|
|
[self delayTouches:cleared andEvent:event];
|
|
}
|
|
|
|
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
|
|
NSSet *cleared = [self copyClearedTouches:touches phase:UITouchPhaseMoved];
|
|
|
|
if (delayTimer) {
|
|
// We should check if movement was significant enough to fire an event
|
|
// for dragging to work correctly.
|
|
for (UITouch *touch in cleared) {
|
|
CGPoint from = [touch locationInView:self.view];
|
|
CGPoint to = [touch previousLocationInView:self.view];
|
|
CGFloat xDistance = from.x - to.x;
|
|
CGFloat yDistance = from.y - to.y;
|
|
|
|
CGFloat distance = sqrt(xDistance * xDistance + yDistance * yDistance);
|
|
|
|
// Early exit, since one of touches has moved enough to fire a drag event.
|
|
if (distance > kGLGestureMovementDistance) {
|
|
[delayTimer fire];
|
|
[self.view touchesMoved:cleared withEvent:event];
|
|
[cleared release];
|
|
return;
|
|
}
|
|
}
|
|
[cleared release];
|
|
return;
|
|
}
|
|
|
|
[self.view touchesMoved:cleared withEvent:event];
|
|
[cleared release];
|
|
}
|
|
|
|
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
|
|
[delayTimer fire];
|
|
|
|
NSSet *cleared = [self copyClearedTouches:touches phase:UITouchPhaseEnded];
|
|
[self.view touchesEnded:cleared withEvent:event];
|
|
[cleared release];
|
|
}
|
|
|
|
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {
|
|
[delayTimer fire];
|
|
[self.view touchesCancelled:touches withEvent:event];
|
|
};
|
|
|
|
- (NSSet *)copyClearedTouches:(NSSet *)touches phase:(UITouchPhase)phaseToSave {
|
|
NSMutableSet *cleared = [touches mutableCopy];
|
|
|
|
for (UITouch *touch in touches) {
|
|
if (touch.phase != phaseToSave) {
|
|
[cleared removeObject:touch];
|
|
}
|
|
}
|
|
|
|
return cleared;
|
|
}
|
|
|
|
@end
|