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94 lines
2.9 KiB
Objective-C
94 lines
2.9 KiB
Objective-C
//
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// TrackPad.m
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// Mini vMac for iOS
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//
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// Created by Jesús A. Álvarez on 18/04/2016.
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// Copyright © 2016 namedfork. All rights reserved.
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//
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#import "TrackPad.h"
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#import "AppDelegate.h"
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#define TRACKPAD_ACCEL_N 1
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#define TRACKPAD_ACCEL_T 0.2
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#define TRACKPAD_ACCEL_D 20
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@implementation TrackPad
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{
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NSTimeInterval touchTimeThreshold;
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NSTimeInterval previousClickTime, previousTouchTime;
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CGFloat touchDistanceThreshold;
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CGPoint previousTouchLoc;
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BOOL click, drag;
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NSMutableSet *currentTouches;
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}
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- (instancetype)initWithFrame:(CGRect)frame {
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if ((self = [super initWithFrame:frame])) {
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touchTimeThreshold = 0.25;
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touchDistanceThreshold = 16;
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currentTouches = [NSMutableSet setWithCapacity:4];
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}
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return self;
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}
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- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
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click = YES;
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CGPoint touchLoc = [touches.anyObject locationInView:self];
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if ((event.timestamp - previousTouchTime < touchTimeThreshold) &&
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fabs(previousTouchLoc.x - touchLoc.x) < touchDistanceThreshold &&
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fabs(previousTouchLoc.y - touchLoc.y) < touchDistanceThreshold) {
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drag = YES;
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[[AppDelegate sharedInstance] setMouseButton:YES];
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}
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previousTouchTime = event.timestamp;
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previousTouchLoc = touchLoc;
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}
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- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
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CGPoint touchLoc = [touches.anyObject locationInView:self];
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CGPoint locDiff = touchLoc;
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locDiff.x -= previousTouchLoc.x;
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locDiff.y -= previousTouchLoc.y;
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// acceleration
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NSTimeInterval timeDiff = 100 * (event.timestamp - previousTouchTime);
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NSTimeInterval accel = TRACKPAD_ACCEL_N / (TRACKPAD_ACCEL_T + ((timeDiff * timeDiff)/TRACKPAD_ACCEL_D));
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locDiff.x *= accel;
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locDiff.y *= accel;
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click = NO;
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[[AppDelegate sharedInstance] moveMouseX:locDiff.x Y:locDiff.y];
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previousTouchTime = event.timestamp;
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previousTouchLoc = touchLoc;
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}
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- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
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CGPoint touchLoc = [touches.anyObject locationInView:self];
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if (click && (event.timestamp - previousTouchTime < touchTimeThreshold)) {
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[NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(mouseClick) object:nil];
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[NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(mouseUp) object:nil];
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[self performSelector:@selector(mouseClick) withObject:nil afterDelay:touchTimeThreshold];
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}
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click = NO;
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if (drag) {
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[[AppDelegate sharedInstance] setMouseButton:NO];
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drag = NO;
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}
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previousTouchLoc = touchLoc;
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previousTouchTime = event.timestamp;
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}
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- (void)mouseClick {
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if (drag) {
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return;
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}
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[[AppDelegate sharedInstance] setMouseButton:YES];
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[self performSelector:@selector(mouseUp) withObject:nil afterDelay:2.0/60.0];
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}
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- (void)mouseUp {
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[[AppDelegate sharedInstance] setMouseButton:NO];
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}
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@end
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