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1 package de.mpg.mpiwg.itgroup.digilib.digiImage;
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2
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3 import java.io.IOException;
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4 import java.io.InputStream;
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5 import java.net.MalformedURLException;
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6 import java.net.URL;
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7 import java.util.ArrayList;
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8 import java.util.Arrays;
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9 import java.util.HashMap;
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10 import java.util.List;
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11 import java.util.Map;
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12
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20
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13
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14
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15 import org.apache.commons.lang.StringUtils;
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16 import org.eclipse.core.runtime.IAdaptable;
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17 import org.eclipse.jface.viewers.ISelection;
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18 import org.eclipse.jface.viewers.ISelectionChangedListener;
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19 import org.eclipse.jface.viewers.ISelectionProvider;
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20 import org.eclipse.jface.viewers.SelectionChangedEvent;
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21 import org.eclipse.jface.viewers.StructuredSelection;
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22 import org.eclipse.swt.graphics.Image;
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23 import org.eclipse.swt.widgets.Composite;
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24 import org.eclipse.swt.widgets.Label;
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25 import org.eclipse.swt.widgets.Shell;
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26 import org.eclipse.ui.IWorkbenchPage;
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27 import org.eclipse.ui.IWorkbenchSite;
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28 import org.eclipse.ui.IWorkbenchWindow;
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29 import org.eclipse.ui.model.IWorkbenchAdapter;
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30 import org.eclipse.ui.views.properties.IPropertySource;
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31
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32 import de.mpg.mpiwg.itgroup.digilib.digiImage.properties.DigiImageProperties;
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33 import de.mpg.mpiwg.itgroup.digilib.manipulator.extensions.ZoomAreaRectangleListener;
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34
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35
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36
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37
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38 /**
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39 * Refers to an Digilib-Scaler Object either an image or an folder. The object contains an swt-label object, so that it can be embedded e.g. in Eclipse.
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40 * @author dwinter
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41 *
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42 */
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43 public class DigiImage implements IDigiImage, IAdaptable, ISelectionProvider{
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44
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45 /**
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46 * Implemens a connection to Digilib.
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47 */
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48
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49 private List<ISelectionChangedListener> selectionChangeListener = new ArrayList<ISelectionChangedListener>();
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50
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51 /* some parameters should not occur in the URL constructed by {@link #createUrlFromParameter(DigiImageParameter)} if set to negative values.
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52 *
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53 */
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54 private static String[] omitIfNegativeArray = {"dw","dh","ddpi","ddpix","ddpiy"};
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55 private static List<String> omitIfNegative = Arrays.asList(omitIfNegativeArray);
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56
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57
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58 private String baseUrl="http://digilib.mpiwg-berlin.mpg.de/digitallibrary/servlet/Scaler";
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59
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60 /**
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61 * Get the Url of the digilib scaler, set to http://digilib.mpiwg-berlin.mpg.de/digitallibrary/servlet/Scaler, if not changed.
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62 * TODO should be part of a configuration/preference file
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63 * @return
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64 */
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65 public String getBaseUrl() {
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66 return baseUrl;
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67 }
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68
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69 /**
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70 * Setze die Basis url des Digilib-Scalers
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71 * @param baseUrl
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72 */
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73 public void setBaseUrl(String baseUrl) {
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74 this.baseUrl = baseUrl;
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75 }
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76
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77 private Label label;
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78
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79 /* (non-Javadoc)
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80 * @see de.mpg.mpiwg.itgroup.digilib.digiImage.IDigiImage#getLabel()
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81 */
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82 public Label getLabel() {
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83 return label;
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84 }
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85
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86 /* (non-Javadoc)
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87 * @see de.mpg.mpiwg.itgroup.digilib.digiImage.IDigiImage#setLabel(org.eclipse.swt.widgets.Label)
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88 */
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89 public void setLabel(Label label) {
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90 this.label = label;
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91 }
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92
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93 //private URL url;
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94 private Composite parent;
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95
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96 private DigiImageParameter dp;
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97
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98
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99 /**
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100 *
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101 * @param parent Composite where the image should be become a child of.
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102 * @param style SWT Style how to display the image as a composite. For more the the style parameter at @see import org.eclipse.swt.widgets.Label
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103 * @param dp Set of Parameters which define how the image should be displayed.
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104 */
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105 public DigiImage(Composite parent, int style, DigiImageParameter dp) {
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106 //super(parent,style);
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107 label = new Label(parent, style);
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108 this.parent = parent;
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109 this.dp=dp;
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110 try {
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111 setNewURL(createUrlFromParameter(dp));
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112 } catch (MalformedURLException e) {
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113 // TODO Auto-generated catch block
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114 e.printStackTrace();
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115 }
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116
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117 }
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118
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119 /**
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120 * Sets the complete URL of the manipulated image and changes the image object in the composite.
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121 * @param url
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122 */
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123 private void setNewURL(URL url) {
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124 //this.url = url;
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125
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126
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127 InputStream is;
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128 try {
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129 is = url.openStream();
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130 } catch (IOException e) {
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131 // TODO Auto-generated catch block
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132 e.printStackTrace();
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133 return;
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134 }
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135 Image img = new Image(parent.getDisplay(),is);
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136 //Label label = new Label(parent, SWT.None);
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137 label.setImage(img);
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138
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139 label.setVisible(true);
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140 }
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141
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142
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143 /* (non-Javadoc)
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144 * @see de.mpg.mpiwg.itgroup.digilib.digiImage.IDigiImage#getParent()
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145 */
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146 public Composite getParent() {
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147 return parent;
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148 }
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149
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150
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151 /**
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152 * Creates the URL to digilib from the given parameter set. For the documentation @see {@link http://developer.berlios.de/docman/display_doc.php?docid=106&group_id=251}.
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153 * @param dp
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154 * @return
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155 * @throws MalformedURLException
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156 */
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157 private URL createUrlFromParameter(DigiImageParameter dp) throws MalformedURLException{
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158
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159 Map<String, String> qa = dp.createMapFromParameters(omitIfNegative);
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160
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161 List<String> queryArray = new ArrayList<String>();
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162 for(String key:qa.keySet()){
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163 queryArray.add(key+"="+qa.get(key));
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164 }
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165 String queryString = StringUtils.join(queryArray,"&");
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166
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167 String stringUrl=baseUrl+"?"+queryString;
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168 return new URL(stringUrl);
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169 }
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170
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171
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172
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173 /* (non-Javadoc)
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174 * @see de.mpg.mpiwg.itgroup.digilib.digiImage.IDigiImage#getParameter()
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175 */
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176 public DigiImageParameter getParameter() {
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177
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178 return dp;
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179 }
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180
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181 /* (non-Javadoc)
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182 * @see de.mpg.mpiwg.itgroup.digilib.digiImage.IDigiImage#setParameter(de.mpg.mpiwg.itgroup.digilib.digiImage.DigiImageParameter)
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183 */
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184 public void setParameter(DigiImageParameter dp) {
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185 this.dp=dp;
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186
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187 }
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188
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189 /* (non-Javadoc)
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190 * @see de.mpg.mpiwg.itgroup.digilib.digiImage.IDigiImage#redraw()
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191 */
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192 public void redraw(){
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193 try {
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194 setNewURL(createUrlFromParameter(dp));
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195 setSelection(new StructuredSelection(this));
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196 } catch (MalformedURLException e) {
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197 // TODO Auto-generated catch block
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198 e.printStackTrace();
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199 }
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200 }
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201
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202
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203 private ZoomAreaRectangleListener rectangleListener=null;
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204
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205 /* (non-Javadoc)
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206 * @see de.mpg.mpiwg.itgroup.digilib.digiImage.IDigiImage#getRectangleListener()
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207 */
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208 public ZoomAreaRectangleListener getRectangleListener() {
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209
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210 return rectangleListener;
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211 }
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212
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213 /* (non-Javadoc)
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214 * @see de.mpg.mpiwg.itgroup.digilib.digiImage.IDigiImage#setRectangleListener(de.mpg.mpiwg.itgroup.digilib.manipulator.extensions.RectangleListener)
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215 */
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216 public void setRectangleListener(ZoomAreaRectangleListener rectangleListener) {
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217 this.rectangleListener = rectangleListener;
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218 }
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219
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220 public Object getAdapter(Class adapter) {
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221 if (adapter == IPropertySource.class)
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222 return new DigiImageProperties(this);
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223 return null;
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224
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225 }
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226
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227 public void addSelectionChangedListener(ISelectionChangedListener listener) {
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228 selectionChangeListener.add(listener);
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229
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230 }
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231
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232 public ISelection getSelection() {
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233 // TODO Auto-generated method stub
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234 return new StructuredSelection(this);
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235 }
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236
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237 public void removeSelectionChangedListener(
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238 ISelectionChangedListener listener) {
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239 selectionChangeListener.remove(listener);
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240
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241 }
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242
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243 public void setSelection(ISelection selection) {
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244
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245 for (ISelectionChangedListener sl: selectionChangeListener){
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246
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247 SelectionChangedEvent event = new SelectionChangedEvent(this, selection);
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248 sl.selectionChanged(event);
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249
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250
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251 }
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252
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253 }
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254
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255
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256 }
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257
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