Add overview myway timeliness table
[busui.git] / labs / openlayers / lib / OpenLayers / Control / PanZoom.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
/* Copyright (c) 2006-2010 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the Clear BSD license.  
 * See http://svn.openlayers.org/trunk/openlayers/license.txt for the
 * full text of the license. */
 
 
/**
 * @requires OpenLayers/Control.js
 */
 
/**
 * Class: OpenLayers.Control.PanZoom
 * The PanZoom is a visible control, composed of a
 * <OpenLayers.Control.PanPanel> and a <OpenLayers.Control.ZoomPanel>. By
 * default it is drawn in the upper left corner of the map.
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.PanZoom = OpenLayers.Class(OpenLayers.Control, {
 
    /** 
     * APIProperty: slideFactor
     * {Integer} Number of pixels by which we'll pan the map in any direction 
     *     on clicking the arrow buttons.  If you want to pan by some ratio
     *     of the map dimensions, use <slideRatio> instead.
     */
    slideFactor: 50,
 
    /** 
     * APIProperty: slideRatio
     * {Number} The fraction of map width/height by which we'll pan the map            
     *     on clicking the arrow buttons.  Default is null.  If set, will
     *     override <slideFactor>. E.g. if slideRatio is .5, then the Pan Up
     *     button will pan up half the map height. 
     */
    slideRatio: null,
 
    /** 
     * Property: buttons
     * {Array(DOMElement)} Array of Button Divs 
     */
    buttons: null,
 
    /** 
     * Property: position
     * {<OpenLayers.Pixel>} 
     */
    position: null,
 
    /**
     * Constructor: OpenLayers.Control.PanZoom
     * 
     * Parameters:
     * options - {Object}
     */
    initialize: function(options) {
        this.position = new OpenLayers.Pixel(OpenLayers.Control.PanZoom.X,
                                             OpenLayers.Control.PanZoom.Y);
        OpenLayers.Control.prototype.initialize.apply(this, arguments);
    },
 
    /**
     * APIMethod: destroy
     */
    destroy: function() {
        OpenLayers.Control.prototype.destroy.apply(this, arguments);
        this.removeButtons();
        this.buttons = null;
        this.position = null;
    },
 
    /**
     * Method: draw
     *
     * Parameters:
     * px - {<OpenLayers.Pixel>} 
     * 
     * Returns:
     * {DOMElement} A reference to the container div for the PanZoom control.
     */
    draw: function(px) {
        // initialize our internal div
        OpenLayers.Control.prototype.draw.apply(this, arguments);
        px = this.position;
 
        // place the controls
        this.buttons = [];
 
        var sz = new OpenLayers.Size(18,18);
        var centered = new OpenLayers.Pixel(px.x+sz.w/2, px.y);
 
        this._addButton("panup", "north-mini.png", centered, sz);
        px.y = centered.y+sz.h;
        this._addButton("panleft", "west-mini.png", px, sz);
        this._addButton("panright", "east-mini.png", px.add(sz.w, 0), sz);
        this._addButton("pandown", "south-mini.png", 
                        centered.add(0, sz.h*2), sz);
        this._addButton("zoomin", "zoom-plus-mini.png", 
                        centered.add(0, sz.h*3+5), sz);
        this._addButton("zoomworld", "zoom-world-mini.png", 
                        centered.add(0, sz.h*4+5), sz);
        this._addButton("zoomout", "zoom-minus-mini.png", 
                        centered.add(0, sz.h*5+5), sz);
        return this.div;
    },
    
    /**
     * Method: _addButton
     * 
     * Parameters:
     * id - {String} 
     * img - {String} 
     * xy - {<OpenLayers.Pixel>} 
     * sz - {<OpenLayers.Size>} 
     * 
     * Returns:
     * {DOMElement} A Div (an alphaImageDiv, to be precise) that contains the
     *     image of the button, and has all the proper event handlers set.
     */
    _addButton:function(id, img, xy, sz) {
        var imgLocation = OpenLayers.Util.getImagesLocation() + img;
        var btn = OpenLayers.Util.createAlphaImageDiv(
                                    this.id + "_" + id, 
                                    xy, sz, imgLocation, "absolute");
 
        //we want to add the outer div
        this.div.appendChild(btn);
 
        OpenLayers.Event.observe(btn, "mousedown", 
            OpenLayers.Function.bindAsEventListener(this.buttonDown, btn));
        OpenLayers.Event.observe(btn, "dblclick", 
            OpenLayers.Function.bindAsEventListener(this.doubleClick, btn));
        OpenLayers.Event.observe(btn, "click", 
            OpenLayers.Function.bindAsEventListener(this.doubleClick, btn));
        btn.action = id;
        btn.map = this.map;
    
        if(!this.slideRatio){
            var slideFactorPixels = this.slideFactor;
            var getSlideFactor = function() {
                return slideFactorPixels;
            };
        } else {
            var slideRatio = this.slideRatio;
            var getSlideFactor = function(dim) {
                return this.map.getSize()[dim] * slideRatio;
            };
        }
 
        btn.getSlideFactor = getSlideFactor;
 
        //we want to remember/reference the outer div
        this.buttons.push(btn);
        return btn;
    },
    
    /**
     * Method: _removeButton
     * 
     * Parameters:
     * btn - {Object}
     */
    _removeButton: function(btn) {
        OpenLayers.Event.stopObservingElement(btn);
        btn.map = null;
        btn.getSlideFactor = null;
        this.div.removeChild(btn);
        OpenLayers.Util.removeItem(this.buttons, btn);
    },
    
    /**
     * Method: removeButtons
     */
    removeButtons: function() {
        for(var i=this.buttons.length-1; i>=0; --i) {
            this._removeButton(this.buttons[i]);
        }
    },
    
    /**
     * Method: doubleClick
     *
     * Parameters:
     * evt - {Event} 
     *
     * Returns:
     * {Boolean}
     */
    doubleClick: function (evt) {
        OpenLayers.Event.stop(evt);
        return false;
    },
    
    /**
     * Method: buttonDown
     *
     * Parameters:
     * evt - {Event} 
     */
    buttonDown: function (evt) {
        if (!OpenLayers.Event.isLeftClick(evt)) {
            return;
        }
 
        switch (this.action) {
            case "panup": 
                this.map.pan(0, -this.getSlideFactor("h"));
                break;
            case "pandown": 
                this.map.pan(0, this.getSlideFactor("h"));
                break;
            case "panleft": 
                this.map.pan(-this.getSlideFactor("w"), 0);
                break;
            case "panright": 
                this.map.pan(this.getSlideFactor("w"), 0);
                break;
            case "zoomin": 
                this.map.zoomIn(); 
                break;
            case "zoomout": 
                this.map.zoomOut(); 
                break;
            case "zoomworld": 
                this.map.zoomToMaxExtent(); 
                break;
        }
 
        OpenLayers.Event.stop(evt);
    },
 
    CLASS_NAME: "OpenLayers.Control.PanZoom"
});
 
/**
 * Constant: X
 * {Integer}
 */
OpenLayers.Control.PanZoom.X = 4;
 
/**
 * Constant: Y
 * {Integer}
 */
OpenLayers.Control.PanZoom.Y = 4;