//
//  RMMercatorToScreenProjection.h
//
// 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 <Foundation/Foundation.h>
#import <CoreGraphics/CoreGraphics.h>

#import "RMFoundation.h"

@class RMProjection;

// This is a stateful projection. As the screen moves around, so too do projections change.
@interface RMMercatorToScreenProjection : NSObject
{
	// What the screen is currently looking at.
	RMProjectedPoint origin;

	// The mercator -or-whatever- projection that the map is in.
	// This projection move linearly with the screen.
	RMProjection *projection;

	// Bounds of the screen in pixels
	// \bug name is "screenBounds" but is probably the view, not the whole screen?
	CGRect screenBounds;

	// \brief meters per pixel
	float metersPerPixel;
}

@property (assign, readwrite) RMProjectedPoint origin;
@property (nonatomic,readonly) RMProjection *projection;

@property (assign, readwrite) float metersPerPixel;

- (id)initFromProjection:(RMProjection *)aProjection toScreenBounds:(CGRect)aScreenBounds;

// Deltas in screen coordinates.
- (RMProjectedPoint)moveProjectedPoint:(RMProjectedPoint)aPoint by:(CGSize)delta;
// Deltas in screen coordinates.
- (RMProjectedRect)moveProjectedRect:(RMProjectedRect)aRect by:(CGSize)delta;

// pivot given in screen coordinates.
- (RMProjectedPoint)zoomProjectedPoint:(RMProjectedPoint)aPoint byFactor:(float)factor near:(CGPoint)pivot;
// pivot given in screen coordinates.
- (RMProjectedRect)zoomProjectedRect:(RMProjectedRect)aRect byFactor:(float)factor near:(CGPoint)pivot;

// Move the screen.
- (void)moveScreenBy:(CGSize)delta;
- (void)zoomScreenByFactor:(float)factor near:(CGPoint)aPoint;

// Project -> screen coordinates.
- (CGPoint)projectProjectedPoint:(RMProjectedPoint)aPoint withMetersPerPixel:(float)aScale;
// Project -> screen coordinates.
- (CGPoint)projectProjectedPoint:(RMProjectedPoint)aPoint;
// Project -> screen coordinates.
- (CGRect)projectProjectedRect:(RMProjectedRect)aRect;

- (RMProjectedPoint)projectScreenPointToProjectedPoint:(CGPoint)aPoint;
- (RMProjectedRect)projectScreenRectToProjectedRect:(CGRect)aRect;
- (RMProjectedSize)projectScreenSizeToProjectedSize:(CGSize)aSize;
- (RMProjectedPoint)projectScreenPointToProjectedPoint:(CGPoint)aPixelPoint withMetersPerPixel:(float)aScale;

- (RMProjectedRect)projectedBounds;
- (void)setProjectedBounds:(RMProjectedRect)bounds;
- (RMProjectedPoint)projectedCenter;
- (void)setProjectedCenter:(RMProjectedPoint)aPoint;
- (void)setScreenBounds:(CGRect)rect;
- (CGRect)screenBounds;

- (void)deepCopy:(RMMercatorToScreenProjection *)copy;

@end