svn-gvsig-desktop / branches / v2_0_0_prep / libraries / libFMap_mapcontrol / src / org / gvsig / fmap / mapcontrol / tools / ZoomInListenerImpl.java @ 23645
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1 | 21203 | vcaballero | /* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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2 | *
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3 | * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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4 | *
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5 | * This program is free software; you can redistribute it and/or
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6 | * modify it under the terms of the GNU General Public License
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7 | * as published by the Free Software Foundation; either version 2
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8 | * of the License, or (at your option) any later version.
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9 | *
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10 | * This program is distributed in the hope that it will be useful,
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 | * GNU General Public License for more details.
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14 | *
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15 | * You should have received a copy of the GNU General Public License
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16 | * along with this program; if not, write to the Free Software
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17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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18 | *
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19 | * For more information, contact:
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20 | *
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21 | * Generalitat Valenciana
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22 | * Conselleria d'Infraestructures i Transport
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23 | * Av. Blasco Ib??ez, 50
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24 | * 46010 VALENCIA
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25 | * SPAIN
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26 | *
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27 | * +34 963862235
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28 | * gvsig@gva.es
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29 | * www.gvsig.gva.es
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30 | *
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31 | * or
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32 | *
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33 | * IVER T.I. S.A
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34 | * Salamanca 50
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35 | * 46005 Valencia
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36 | * Spain
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37 | *
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38 | * +34 963163400
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39 | * dac@iver.es
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40 | */
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41 | package org.gvsig.fmap.mapcontrol.tools; |
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42 | |||
43 | import java.awt.Cursor; |
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44 | import java.awt.Image; |
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45 | import java.awt.Point; |
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46 | import java.awt.Toolkit; |
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47 | import java.awt.geom.Rectangle2D; |
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48 | |||
49 | import javax.swing.ImageIcon; |
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50 | |||
51 | 21500 | vcaballero | import org.gvsig.fmap.geom.primitive.DefaultEnvelope; |
52 | import org.gvsig.fmap.geom.primitive.Envelope; |
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53 | 21203 | vcaballero | import org.gvsig.fmap.mapcontext.MapContext; |
54 | import org.gvsig.fmap.mapcontext.ViewPort; |
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55 | import org.gvsig.fmap.mapcontrol.MapControl; |
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56 | 21711 | vcaballero | import org.gvsig.fmap.mapcontrol.tools.Events.EnvelopeEvent; |
57 | 21203 | vcaballero | import org.gvsig.fmap.mapcontrol.tools.Listeners.RectangleListener; |
58 | |||
59 | |||
60 | |||
61 | /**
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62 | * <p>Listener for doing a <i>zoom in</i> operation of the extent of the <code>ViewPort</code> of the associated {@link MapControl MapControl}
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63 | * object, defining a rectangular area.</p>
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64 | 21500 | vcaballero | *
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65 | 21203 | vcaballero | * <p>If the area defined is smaller than 3 pixels x 3 pixels holds the zoom, otherwise, calculates the new extent <i>r</i>
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66 | * with this equations:
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67 | * <code><br>
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68 | * double factor = 1/MapContext.ZOOMINFACTOR;<br>
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69 | * Rectangle2D rect = event.getWorldCoordRect();<br>
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70 | * Rectangle2D.Double r = new Rectangle2D.Double();<br>
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71 | 21500 | vcaballero | * ViewPort vp = mapCtrl.getMapContext().getViewPort();<br>
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72 | 21203 | vcaballero | * double nuevoX = rect.getMaxX() - ((vp.getExtent().getWidth() * factor) / 2.0);<br>
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73 | * double nuevoY = rect.getMaxY() - ((vp.getExtent().getHeight() * factor) / 2.0);<br>
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74 | * Rectangle2D.Double r; // This will be the new extent<br>
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75 | * r.x = nuevoX;<br>
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76 | * r.y = nuevoY;<br>
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77 | * r.width = vp.getExtent().getWidth() * factor;<br>
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78 | * r.height = vp.getExtent().getHeight() * factor;<br>
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79 | * vp.setExtent(r);
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80 | * </code>
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81 | * </p>
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82 | 21500 | vcaballero | *
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83 | 21203 | vcaballero | * <p>The ultimately extent will be an adaptation from that, calculated by the <code>ViewPort</code>
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84 | * bearing in mind the ratio of the available rectangle where display the graphical information.</p>
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85 | *
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86 | * @see MapContext#ZOOMINFACTOR
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87 | 21500 | vcaballero | * @see ViewPort#setEnvelope(Envelope)
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88 | 21203 | vcaballero | * @see ZoomOutListenerImpl
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89 | * @see ZoomOutRightButtonListener
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90 | *
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91 | * @author Vicente Caballero Navarro
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92 | */
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93 | public class ZoomInListenerImpl implements RectangleListener { |
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94 | /**
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95 | * The image to display when the cursor is active.
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96 | */
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97 | private final Image izoomin = new ImageIcon(MapControl.class.getResource( |
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98 | "images/ZoomInCursor.gif")).getImage();
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99 | |||
100 | /**
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101 | * The cursor used to work with this tool listener.
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102 | 21500 | vcaballero | *
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103 | 21203 | vcaballero | * @see #getCursor()
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104 | */
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105 | 23645 | vcaballero | // private Cursor cur = Toolkit.getDefaultToolkit().createCustomCursor(izoomin,
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106 | // new Point(16, 16), "");
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107 | 21203 | vcaballero | |
108 | /**
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109 | * Reference to the <code>MapControl</code> object that uses.
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110 | */
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111 | private MapControl mapCtrl;
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112 | |||
113 | |||
114 | /**
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115 | * <p>Creates a new <code>ZoomInListenerImpl</code> object.</p>
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116 | *
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117 | * @param mapCtrl the <code>MapControl</code> where is defined the rectangle
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118 | */
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119 | public ZoomInListenerImpl(MapControl mapCtrl) {
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120 | this.mapCtrl = mapCtrl;
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121 | } |
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122 | |||
123 | /*
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124 | * (non-Javadoc)
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125 | * @see com.iver.cit.gvsig.fmap.tools.Listeners.RectangleListener#rectangle(com.iver.cit.gvsig.fmap.tools.Events.RectangleEvent)
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126 | */
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127 | 21711 | vcaballero | public void rectangle(EnvelopeEvent event) { |
128 | Envelope rect = event.getWorldCoordRect(); |
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129 | 21203 | vcaballero | Rectangle2D pixelRect = event.getPixelCoordRect();
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130 | |||
131 | 21500 | vcaballero | |
132 | 21203 | vcaballero | ViewPort vp = mapCtrl.getMapContext().getViewPort(); |
133 | |||
134 | if ((pixelRect.getWidth() < 3) && (pixelRect.getHeight() < 3)) |
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135 | { |
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136 | if (vp.getExtent()!=null){ |
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137 | double factor = 1/MapContext.ZOOMINFACTOR; |
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138 | 22179 | jmvivo | double x = rect.getMaximum(0) - |
139 | 21203 | vcaballero | ((vp.getExtent().getWidth() * factor) / 2.0);
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140 | 22179 | jmvivo | double y = rect.getMaximum(1) - |
141 | 21203 | vcaballero | ((vp.getExtent().getHeight() * factor) / 2.0);
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142 | 21500 | vcaballero | double width = vp.getExtent().getWidth() * factor;
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143 | double height = vp.getExtent().getHeight() * factor;
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144 | 22179 | jmvivo | Envelope r = new DefaultEnvelope(x, y, x + width, y + height);
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145 | 21500 | vcaballero | vp.setEnvelope(r); |
146 | 21203 | vcaballero | } |
147 | } |
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148 | else
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149 | { |
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150 | 21711 | vcaballero | vp.setEnvelope(event.getWorldCoordRect()); |
151 | 21203 | vcaballero | } |
152 | mapCtrl.getMapContext().clearAllCachingImageDrawnLayers(); |
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153 | // mapCtrl.drawMap(false);
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154 | } |
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155 | |||
156 | /*
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157 | * (non-Javadoc)
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158 | 23645 | vcaballero | * @see com.iver.cit.gvsig.fmap.tools.Listeners.ToolListener#getImageCursor()
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159 | 21203 | vcaballero | */
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160 | 23645 | vcaballero | public Image getImageCursor() { |
161 | return izoomin;
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162 | 21203 | vcaballero | } |
163 | |||
164 | /*
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165 | * (non-Javadoc)
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166 | * @see com.iver.cit.gvsig.fmap.tools.Listeners.ToolListener#cancelDrawing()
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167 | */
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168 | public boolean cancelDrawing() { |
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169 | System.out.println("cancelDrawing del ZoomOutListenerImpl"); |
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170 | return true; |
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171 | } |
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172 | } |