RMMapView.m
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//
// RMMapView.m
//
// Copyright (c) 2008-2009, Route-Me Contributors
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
#import "RMMapView.h"
#import "RMMapContents.h"
#import "RMMapViewDelegate.h"
#import "RMTileLoader.h"
#import "RMMercatorToScreenProjection.h"
#import "RMMarker.h"
#import "RMMarkerManager.h"
@interface RMMapView (PrivateMethods)
// methods for post-touch deceleration, ala UIScrollView
- (void)startDecelerationWithDelta:(CGSize)delta;
- (void)incrementDeceleration:(NSTimer *)timer;
- (void)stopDeceleration;
@end
@implementation RMMapView
@synthesize decelerationFactor;
@synthesize deceleration;
@synthesize contents;
#pragma mark --- begin constants ----
#define kDefaultDeceleartionFactor .88f
#define kMinDecelerationDelta 0.01f
#pragma mark --- end constants ----
- (RMMarkerManager*)markerManager
{
return self.contents.markerManager;
}
-(void) performInitialSetup
{
LogMethod();
enableDragging = YES;
enableZoom = YES;
decelerationFactor = kDefaultDeceleartionFactor;
deceleration = NO;
// [self recalculateImageSet];
if (enableZoom)
[self setMultipleTouchEnabled:TRUE];
self.backgroundColor = [UIColor grayColor];
// [[NSURLCache sharedURLCache] removeAllCachedResponses];
}
- (id)initWithFrame:(CGRect)frame
{
LogMethod();
if (self = [super initWithFrame:frame]) {
[self performInitialSetup];
}
return self;
}
/// \deprecated Deprecated any time after 0.5.
- (id)initWithFrame:(CGRect)frame WithLocation:(CLLocationCoordinate2D)latlon
{
WarnDeprecated();
LogMethod();
if (self = [super initWithFrame:frame]) {
[self performInitialSetup];
}
[self moveToLatLong:latlon];
return self;
}
//===========================================================
// contents
//===========================================================
- (RMMapContents *)contents
{
if (!_contentsIsSet) {
self.contents = [[RMMapContents alloc] initForView:self];
_contentsIsSet = YES;
}
return contents;
}
- (void)setContents:(RMMapContents *)theContents
{
if (contents != theContents) {
[contents release];
contents = [theContents retain];
_contentsIsSet = YES;
[self performInitialSetup];
}
}
-(void) dealloc
{
LogMethod();
self.contents = nil;
[super dealloc];
}
-(void) drawRect: (CGRect) rect
{
[self.contents drawRect:rect];
}
-(NSString*) description
{
CGRect bounds = [self bounds];
return [NSString stringWithFormat:@"MapView at %.0f,%.0f-%.0f,%.0f", bounds.origin.x, bounds.origin.y, bounds.size.width, bounds.size.height];
}
/// Forward invocations to RMMapContents
- (void)forwardInvocation:(NSInvocation *)invocation
{
SEL aSelector = [invocation selector];
if ([self.contents respondsToSelector:aSelector])
[invocation invokeWithTarget:self.contents];
else
[self doesNotRecognizeSelector:aSelector];
}
- (NSMethodSignature *)methodSignatureForSelector:(SEL)aSelector
{
if ([super respondsToSelector:aSelector])
return [super methodSignatureForSelector:aSelector];
else
return [self.contents methodSignatureForSelector:aSelector];
}
#pragma mark Delegate
@dynamic delegate;
- (void) setDelegate: (id<RMMapViewDelegate>) _delegate
{
if (delegate == _delegate) return;
delegate = _delegate;
_delegateHasBeforeMapMove = [(NSObject*) delegate respondsToSelector: @selector(beforeMapMove:)];
_delegateHasAfterMapMove = [(NSObject*) delegate respondsToSelector: @selector(afterMapMove:)];
_delegateHasBeforeMapZoomByFactor = [(NSObject*) delegate respondsToSelector: @selector(beforeMapZoom: byFactor: near:)];
_delegateHasAfterMapZoomByFactor = [(NSObject*) delegate respondsToSelector: @selector(afterMapZoom: byFactor: near:)];
_delegateHasDoubleTapOnMap = [(NSObject*) delegate respondsToSelector: @selector(doubleTapOnMap:At:)];
_delegateHasSingleTapOnMap = [(NSObject*) delegate respondsToSelector: @selector(singleTapOnMap:At:)];
_delegateHasTapOnMarker = [(NSObject*) delegate respondsToSelector:@selector(tapOnMarker:onMap:)];
_delegateHasTapOnLabelForMarker = [(NSObject*) delegate respondsToSelector:@selector(tapOnLabelForMarker:onMap:)];
_delegateHasAfterMapTouch = [(NSObject*) delegate respondsToSelector: @selector(afterMapTouch:)];
_delegateHasShouldDragMarker = [(NSObject*) delegate respondsToSelector: @selector(mapView: shouldDragMarker: withEvent:)];
_delegateHasDidDragMarker = [(NSObject*) delegate respondsToSelector: @selector(mapView: didDragMarker: withEvent:)];
_delegateHasDragMarkerPosition = [(NSObject*) delegate respondsToSelector: @selector(dragMarkerPosition: onMap: position:)];
}
- (id<RMMapViewDelegate>) delegate
{
return delegate;
}
#pragma mark Movement
-(void) moveToProjectedPoint: (RMProjectedPoint) aPoint
{
if (_delegateHasBeforeMapMove) [delegate beforeMapMove: self];
[self.contents moveToProjectedPoint:aPoint];
if (_delegateHasAfterMapMove) [delegate afterMapMove: self];
}
-(void) moveToLatLong: (CLLocationCoordinate2D) point
{
if (_delegateHasBeforeMapMove) [delegate beforeMapMove: self];
[self.contents moveToLatLong:point];
if (_delegateHasAfterMapMove) [delegate afterMapMove: self];
}
- (void)moveBy: (CGSize) delta
{
if (_delegateHasBeforeMapMove) [delegate beforeMapMove: self];
[self.contents moveBy:delta];
if (_delegateHasAfterMapMove) [delegate afterMapMove: self];
}
- (void)zoomByFactor: (float) zoomFactor near:(CGPoint) center
{
[self zoomByFactor:zoomFactor near:center animated:NO];
}
- (void)zoomByFactor: (float) zoomFactor near:(CGPoint) center animated:(BOOL)animated
{
if (_delegateHasBeforeMapZoomByFactor) [delegate beforeMapZoom: self byFactor: zoomFactor near: center];
[self.contents zoomByFactor:zoomFactor near:center animated:animated withCallback:(animated && _delegateHasAfterMapZoomByFactor)?self:nil];
if (!animated)
if (_delegateHasAfterMapZoomByFactor) [delegate afterMapZoom: self byFactor: zoomFactor near: center];
}
#pragma mark RMMapContentsAnimationCallback methods
- (void)animationFinishedWithZoomFactor:(float)zoomFactor near:(CGPoint)p
{
if (_delegateHasAfterMapZoomByFactor)
[delegate afterMapZoom: self byFactor: zoomFactor near: p];
}
#pragma mark Event handling
- (RMGestureDetails) gestureDetails: (NSSet*) touches
{
RMGestureDetails gesture;
gesture.center.x = gesture.center.y = 0;
gesture.averageDistanceFromCenter = 0;
int interestingTouches = 0;
for (UITouch *touch in touches)
{
if ([touch phase] != UITouchPhaseBegan
&& [touch phase] != UITouchPhaseMoved
&& [touch phase] != UITouchPhaseStationary)
continue;
// RMLog(@"phase = %d", [touch phase]);
interestingTouches++;
CGPoint location = [touch locationInView: self];
gesture.center.x += location.x;
gesture.center.y += location.y;
}
if (interestingTouches == 0)
{
gesture.center = lastGesture.center;
gesture.numTouches = 0;
gesture.averageDistanceFromCenter = 0.0f;
return gesture;
}
// RMLog(@"interestingTouches = %d", interestingTouches);
gesture.center.x /= interestingTouches;
gesture.center.y /= interestingTouches;
for (UITouch *touch in touches)
{
if ([touch phase] != UITouchPhaseBegan
&& [touch phase] != UITouchPhaseMoved
&& [touch phase] != UITouchPhaseStationary)
continue;
CGPoint location = [touch locationInView: self];
// RMLog(@"For touch at %.0f, %.0f:", location.x, location.y);
float dx = location.x - gesture.center.x;
float dy = location.y - gesture.center.y;
// RMLog(@"delta = %.0f, %.0f distance = %f", dx, dy, sqrtf((dx*dx) + (dy*dy)));
gesture.averageDistanceFromCenter += sqrtf((dx*dx) + (dy*dy));
}
gesture.averageDistanceFromCenter /= interestingTouches;
gesture.numTouches = interestingTouches;
// RMLog(@"center = %.0f,%.0f dist = %f", gesture.center.x, gesture.center.y, gesture.averageDistanceFromCenter);
return gesture;
}
- (void)userPausedDragging
{
[RMMapContents setPerformExpensiveOperations:YES];
}
- (void)unRegisterPausedDraggingDispatcher
{
[NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(userPausedDragging) object:nil];
}
- (void)registerPausedDraggingDispatcher
{
[NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(userPausedDragging) object:nil];
[self performSelector:@selector(userPausedDragging) withObject:nil afterDelay:0.3];
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [[touches allObjects] objectAtIndex:0];
//Check if the touch hit a RMMarker subclass and if so, forward the touch event on
//so it can be handled there
id furthestLayerDown = [self.contents.overlay hitTest:[touch locationInView:self]];
if ([[furthestLayerDown class]isSubclassOfClass: [RMMarker class]]) {
if ([furthestLayerDown respondsToSelector:@selector(touchesBegan:withEvent:)]) {
[furthestLayerDown performSelector:@selector(touchesBegan:withEvent:) withObject:touches withObject:event];
return;
}
}
if (lastGesture.numTouches == 0)
{
[RMMapContents setPerformExpensiveOperations:NO];
}
// RMLog(@"touchesBegan %d", [[event allTouches] count]);
lastGesture = [self gestureDetails:[event allTouches]];
if(deceleration)
{
if (_decelerationTimer != nil) {
[self stopDeceleration];
}
}
[self registerPausedDraggingDispatcher];
}
/// \bug touchesCancelled should clean up, not pass event to markers
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [[touches allObjects] objectAtIndex:0];
//Check if the touch hit a RMMarker subclass and if so, forward the touch event on
//so it can be handled there
id furthestLayerDown = [self.contents.overlay hitTest:[touch locationInView:self]];
if ([[furthestLayerDown class]isSubclassOfClass: [RMMarker class]]) {
if ([furthestLayerDown respondsToSelector:@selector(touchesCancelled:withEvent:)]) {
[furthestLayerDown performSelector:@selector(touchesCancelled:withEvent:) withObject:touches withObject:event];
return;
}
}
// I don't understand what the difference between this and touchesEnded is.
[self touchesEnded:touches withEvent:event];
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [[touches allObjects] objectAtIndex:0];
//Check if the touch hit a RMMarker subclass and if so, forward the touch event on
//so it can be handled there
id furthestLayerDown = [self.contents.overlay hitTest:[touch locationInView:self]];
if ([[furthestLayerDown class]isSubclassOfClass: [RMMarker class]]) {
if ([furthestLayerDown respondsToSelector:@selector(touchesEnded:withEvent:)]) {
[furthestLayerDown performSelector:@selector(touchesEnded:withEvent:) withObject:touches withObject:event];
return;
}
}
NSInteger lastTouches = lastGesture.numTouches;
// Calculate the gesture.
lastGesture = [self gestureDetails:[event allTouches]];
// If there are no more fingers on the screen, resume any slow operations.
if (lastGesture.numTouches == 0)
{
[self unRegisterPausedDraggingDispatcher];
// When factoring, beware these two instructions need to happen in this order.
[RMMapContents setPerformExpensiveOperations:YES];
}
if (touch.tapCount >= 2)
{
if (_delegateHasDoubleTapOnMap) {
[delegate doubleTapOnMap: self At: lastGesture.center];
} else {
// Default behaviour matches built in maps.app
float nextZoomFactor = [self.contents nextNativeZoomFactor];
if (nextZoomFactor != 0)
[self zoomByFactor:nextZoomFactor near:[touch locationInView:self] animated:YES];
}
} else if (lastTouches == 1 && touch.tapCount != 1) {
// deceleration
if(deceleration)
{
CGPoint prevLocation = [touch previousLocationInView:self];
CGPoint currLocation = [touch locationInView:self];
CGSize touchDelta = CGSizeMake(currLocation.x - prevLocation.x, currLocation.y - prevLocation.y);
[self startDecelerationWithDelta:touchDelta];
}
}
if (touch.tapCount == 1)
{
CALayer* hit = [self.contents.overlay hitTest:[touch locationInView:self]];
// RMLog(@"LAYER of type %@",[hit description]);
if (hit != nil) {
CALayer *superlayer = [hit superlayer];
// See if tap was on a marker or marker label and send delegate protocol method
if ([hit isKindOfClass: [RMMarker class]]) {
if (_delegateHasTapOnMarker) {
[delegate tapOnMarker:(RMMarker*)hit onMap:self];
}
} else if (superlayer != nil && [superlayer isKindOfClass: [RMMarker class]]) {
if (_delegateHasTapOnLabelForMarker) {
[delegate tapOnLabelForMarker:(RMMarker*)superlayer onMap:self];
}
}
else if (_delegateHasSingleTapOnMap) {
[delegate singleTapOnMap: self At: [touch locationInView:self]];
}
}
}
if (_delegateHasAfterMapTouch) [delegate afterMapTouch: self];
// [self.contents recalculateImageSet];
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [[touches allObjects] objectAtIndex:0];
//Check if the touch hit a RMMarker subclass and if so, forward the touch event on
//so it can be handled there
id furthestLayerDown = [self.contents.overlay hitTest:[touch locationInView:self]];
if ([[furthestLayerDown class]isSubclassOfClass: [RMMarker class]]) {
if ([furthestLayerDown respondsToSelector:@selector(touchesMoved:withEvent:)]) {
[furthestLayerDown performSelector:@selector(touchesMoved:withEvent:) withObject:touches withObject:event];
return;
}
}
CALayer* hit = [self.contents.overlay hitTest:[touch locationInView:self]];
// RMLog(@"LAYER of type %@",[hit description]);
if (hit != nil) {
if ([hit isKindOfClass: [RMMarker class]]) {
if (!_delegateHasShouldDragMarker || (_delegateHasShouldDragMarker && [delegate mapView:self shouldDragMarker:(RMMarker*)hit withEvent:event])) {
if (_delegateHasDidDragMarker) {
[delegate mapView:self didDragMarker:(RMMarker*)hit withEvent:event];
return;
}
}
}
}
RMGestureDetails newGesture = [self gestureDetails:[event allTouches]];
if (enableDragging && newGesture.numTouches == lastGesture.numTouches)
{
CGSize delta;
delta.width = newGesture.center.x - lastGesture.center.x;
delta.height = newGesture.center.y - lastGesture.center.y;
if (enableZoom && newGesture.numTouches > 1)
{
NSAssert (lastGesture.averageDistanceFromCenter > 0.0f && newGesture.averageDistanceFromCenter > 0.0f,
@"Distance from center is zero despite >1 touches on the screen");
double zoomFactor = newGesture.averageDistanceFromCenter / lastGesture.averageDistanceFromCenter;
[self moveBy:delta];
[self zoomByFactor: zoomFactor near: newGesture.center];
}
else
{
[self moveBy:delta];
}
}
lastGesture = newGesture;
[self registerPausedDraggingDispatcher];
}
#pragma mark Deceleration
- (void)startDecelerationWithDelta:(CGSize)delta {
if (ABS(delta.width) >= 1.0f && ABS(delta.height) >= 1.0f) {
_decelerationDelta = delta;
_decelerationTimer = [NSTimer scheduledTimerWithTimeInterval:0.01f
target:self
selector:@selector(incrementDeceleration:)
userInfo:nil
repeats:YES];
}
}
- (void)incrementDeceleration:(NSTimer *)timer {
if (ABS(_decelerationDelta.width) < kMinDecelerationDelta && ABS(_decelerationDelta.height) < kMinDecelerationDelta) {
[self stopDeceleration];
return;
}
// avoid calling delegate methods? design call here
[self.contents moveBy:_decelerationDelta];
_decelerationDelta.width *= [self decelerationFactor];
_decelerationDelta.height *= [self decelerationFactor];
}
- (void)stopDeceleration {
if (_decelerationTimer != nil) {
[_decelerationTimer invalidate];
_decelerationTimer = nil;
_decelerationDelta = CGSizeZero;
// call delegate methods; design call (see above)
[self moveBy:CGSizeZero];
}
}
/// Must be called by higher didReceiveMemoryWarning
- (void)didReceiveMemoryWarning
{
LogMethod();
[contents didReceiveMemoryWarning];
}
- (void)setFrame:(CGRect)frame
{
CGRect r = self.frame;
[super setFrame:frame];
// only change if the frame changes AND there is contents
if (!CGRectEqualToRect(r, frame) && contents) {
[contents setFrame:frame];
}
}
@end