SD Image Map User Control - GeneXus X Ev2 - iOS

GXControlImageMap.h

#import "GXControlGridBase.h"

@interface GXControlImageMap : GXControlGridBase {
}

@end

GXControlImageMap.m

#import "GXControlImageMap.h"
#import "GXObjectHelper.h"
#import "GXResources.h"
#import "UIImageView+WebCache.h"

@interface GXControlImageMap (UserControlProperties)
- (NSString *)imageName;
- (NSString *)imageAtt;
- (NSString *)imageField;
- (NSString *)horizontalCoordinateAtt;
- (NSString *)horizontalCoordinateField;
- (NSString *)verticalCoordinateAtt;
- (NSString *)verticalCoordinateField;
- (NSString *)sizeAtt;
- (NSString *)sizeField;
@end

#pragma mark -

@interface GXControlImageMap (Private)
- (void)loadData:(NSInteger)count;
- (CGRect)transformedRect:(CGRect)frame;
@end

#pragma mark -

@implementation GXControlImageMap

- (UIImageView *)imageView {
	return (UIImageView *)[self gridView];
}

#pragma mark - User Control Properties

- (NSString *)imageName {
	NSString *imageName = [[self properties] getPropertyValueString:@"@SDImageMapImage"];
	imageName = [GXObjectHelper parseObjectNameOfType:kGXObjectIdImage from:imageName];
	return imageName;
}

- (NSString *)imageAtt {
	return [[self properties] getPropertyValueString:@"@SDImageMapImageAtt"];
}

- (NSString *)imageField {
	return [[self properties] getPropertyValueString:@"@SDImageMapImageField"];
}

- (NSString *)horizontalCoordinateAtt {
	return [[self properties] getPropertyValueString:@"@SDImageMapHCoordAtt"];	
}

- (NSString *)horizontalCoordinateField {
	return [[self properties] getPropertyValueString:@"@SDImageMapHCoordField"];	
}

- (NSString *)verticalCoordinateAtt {
	return [[self properties] getPropertyValueString:@"@SDImageMapVCoordAtt"];	
}

- (NSString *)verticalCoordinateField {
	return [[self properties] getPropertyValueString:@"@SDImageMapVCoordField"];	
}

- (NSString *)sizeAtt {
	return [[self properties] getPropertyValueString:@"@SDImageMapSizeAtt"];
}

- (NSString *)sizeField {
	return [[self properties] getPropertyValueString:@"@SDImageMapSizeField"];
}

#pragma mark - GXControlGridBase Overrides

- (UIView *)newGridViewWithFrame:(CGRect)frame {
	UIImageView *imageView = [[UIImageView alloc] initWithFrame:frame];
    [imageView setAutoresizingMask:UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth];

	NSString *imageName = [self imageName];
	if (imageName) {
		UIImage *embededImage = [GXResources imageForName:imageName];
		if (embededImage) {
			[imageView setImage:embededImage];
		}
		else {
			NSURL *imageUrl = [GXResources urlForImageName:imageName];
			[imageView setImageWithURL:imageUrl placeholderImage:nil];
		}
	}
	
	[imageView setUserInteractionEnabled:YES];
	
	UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleImageTap:)];
	
	[imageView addGestureRecognizer:tapGestureRecognizer];
	
	[tapGestureRecognizer release];
	
	return imageView;
}

- (void)reloadData {
	[self loadData:[[self entityDataListProvider] numberOfLoadedEntitiesInSection:0]];
}

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation {
	[self reloadData];
}

#pragma mark - Private

- (void)loadData:(NSInteger)count {
	[[[self imageView] subviews] makeObjectsPerformSelector:@selector(removeFromSuperview)];
	
	if (!count) {
		return;
	}
	
	NSString *imageNameAtt = [self imageAtt];
	NSString *imageNameField = [self imageField];
	NSString *hCoordAtt = [self horizontalCoordinateAtt];
	NSString *hCoordField = [self horizontalCoordinateField];
	NSString *vCoordAtt = [self verticalCoordinateAtt];
	NSString *vCoordField = [self verticalCoordinateField];
	NSString *sizeAtt = [self sizeAtt];
	NSString *sizeField = [self sizeField];
	
	BOOL hasDefaultAction = [self canExecuteDefaultActionForEntityAtIndex:0 section:0];
	
	for(NSUInteger index = 0; index < count; index++) {
		NSIndexPath *indexPath = [NSIndexPath indexPathForRow:index inSection:0];

		NSString *imageName = [self valueForEntityDataFieldName:imageNameAtt fieldSpecifier:imageNameField indexPath:indexPath];
		
		NSNumber *hCoord = [self valueForEntityDataFieldName:hCoordAtt fieldSpecifier:hCoordField indexPath:indexPath];
		
		NSNumber *vCoord = [self valueForEntityDataFieldName:vCoordAtt fieldSpecifier:vCoordField indexPath:indexPath];
		
		NSNumber *size = [self valueForEntityDataFieldName:sizeAtt fieldSpecifier:sizeField indexPath:indexPath];
		
		CGRect frame = [self transformedRect:CGRectMake([hCoord intValue], [vCoord intValue], [size intValue], [size intValue])];
		UIView *itemView;
		if (imageName) {
			itemView = [[UIImageView alloc] initWithFrame:frame];
			
			UIImage *embededImage = [GXResources imageForName:imageName];
			if (embededImage) {
				[(UIImageView *)itemView setImage:embededImage];
			}
			else {
				NSURL *imageUrl = [GXResources urlForImageName:imageName];
				[(UIImageView *)itemView setImageWithURL:imageUrl placeholderImage:nil];
			}
		}
		else {
			itemView = [[UIView alloc] initWithFrame:frame];
		}

		[itemView setBackgroundColor:[UIColor clearColor]];
		[itemView setUserInteractionEnabled:hasDefaultAction];
		[itemView setTag:index];
		
		[[self imageView] addSubview:itemView];
		
		[itemView release];
	}
}

- (CGRect)transformedRect:(CGRect)frame {
	CGSize imgSize = [[self imageView] image].size;
	CGSize viewSize = [[self imageView] frame].size;
	
	if (imgSize.height == 0 || imgSize.width == 0) {
		return frame;
	}
	
	CGFloat xTransform = viewSize.width / imgSize.width;
	CGFloat yTransform = viewSize.height / imgSize.height;
	
	return CGRectMake(frame.origin.x * xTransform,
					  frame.origin.y * yTransform,
					  frame.size.width * xTransform,
					  frame.size.height * yTransform
					  );
}

#pragma mark - Actions

- (void)handleImageTap:(UITapGestureRecognizer *)sender {
	UIView *mainView = [self imageView];
	
	CGPoint tapPoint = [sender locationInView:mainView];
	UIView *tappedView = [mainView hitTest:tapPoint withEvent:nil];
	
	if (tappedView && tappedView != mainView) {
		NSUInteger index = [tappedView tag];
		[self executeDefaultActionForEntityAtSection:0 row:index];
	}
}

@end