/Users/sjg/iPhone/WhirlyGlobe/WhirlyGlobeSrc/WhirlyGlobeLib/include/LabelLayer.h

/*
 *  LabelLayer.h
 *  WhirlyGlobeLib
 *
 *  Created by Steve Gifford on 2/7/11.
 *  Copyright 2011 mousebird consulting
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */

#import <math.h>
#import <set>
#import <map>
#import "Identifiable.h"
#import "Drawable.h"
#import "DataLayer.h"
#import "LayerThread.h"
#import "TextureAtlas.h"
#import "DrawCost.h"
#import "SelectionLayer.h"

namespace WhirlyGlobe 
{

static const int LabelDrawPriority=1000;

class LabelSceneRep : public Identifiable
{
public:
    LabelSceneRep();
    ~LabelSceneRep() { }
    
    float fade;          // Fade interval, for deletion
    SimpleIDSet texIDs;  // Textures we created for this
    SimpleIDSet drawIDs; // Drawables created for this
    SimpleIdentity selectID;  // Selection rect
};
typedef std::map<SimpleIdentity,LabelSceneRep *> LabelSceneRepMap;

}

@interface SingleLabel : NSObject
{
    bool isSelectable;
    WhirlyGlobe::SimpleIdentity selectID;
    NSString *text;
    WhirlyGlobe::GeoCoord loc;
    NSDictionary *desc;
    WhirlyGlobe::SimpleIdentity iconTexture;  
}

@property (nonatomic,assign) bool isSelectable;
@property (nonatomic,assign) WhirlyGlobe::SimpleIdentity selectID;
@property (nonatomic,retain) NSString *text;
@property (nonatomic,assign) WhirlyGlobe::GeoCoord loc;
@property (nonatomic,retain) NSDictionary *desc;
@property (nonatomic,assign) WhirlyGlobe::SimpleIdentity iconTexture;

- (bool)calcWidth:(float *)width height:(float *)height defaultFont:(UIFont *)font;

- (void)calcExtents:(NSDictionary *)topDesc corners:(Point3f *)pts norm:(Point3f *)norm;

@end

static const unsigned int LabelTextureAtlasSizeDefault = 512;

@interface LabelLayer : NSObject<WhirlyGlobeLayer>
{
        WhirlyGlobeLayerThread *layerThread;
        WhirlyGlobe::GlobeScene *scene;
    
    WGSelectionLayer *selectLayer;

    WhirlyGlobe::LabelSceneRepMap labelReps;
    
    unsigned int textureAtlasSize;
}

@property (nonatomic,retain) WGSelectionLayer *selectLayer;

- (id)initWithTexAtlasSize:(unsigned int)textureAtlasSize;

- (void)startWithThread:(WhirlyGlobeLayerThread *)layerThread scene:(WhirlyGlobe::GlobeScene *)scene;

- (WhirlyGlobe::SimpleIdentity) addLabel:(NSString *)str loc:(WhirlyGlobe::GeoCoord)loc desc:(NSDictionary *)desc;

- (WhirlyGlobe::SimpleIdentity) addLabel:(SingleLabel *)label;

- (WhirlyGlobe::SimpleIdentity) addLabels:(NSArray *)labels desc:(NSDictionary *)desc;

- (WhirlyGlobe::SimpleIdentity) addLabels:(NSArray *)labels desc:(NSDictionary *)desc cacheName:(NSString *)cacheName;

- (WhirlyGlobe::SimpleIdentity) addLabelsFromCache:(NSString *)cacheName;

- (void)changeLabel:(WhirlyGlobe::SimpleIdentity)labelID desc:(NSDictionary *)dict;

- (DrawCost *)getCost:(WhirlyGlobe::SimpleIdentity)labelID;

- (void) removeLabel:(WhirlyGlobe::SimpleIdentity)labelId;

@end