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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 import de.mpg.mpiwg.itgroup.digilib.plugin.editors.DigilibLinkEditorObservable;
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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 /**
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40 * 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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41 * @author dwinter
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42 *
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43 */
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44 public class DigiImage implements IDigiImage, IAdaptable, ISelectionProvider{
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45
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46 /**
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47 * Implemens a connection to Digilib.
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48 */
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49
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50 private List<ISelectionChangedListener> selectionChangeListener = new ArrayList<ISelectionChangedListener>();
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51
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52 /* some parameters should not occur in the URL constructed by {@link #createUrlFromParameter(DigiImageParameter)} if set to negative values.
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53 *
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54 */
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55 private static String[] omitIfNegativeArray = {"dw","dh","ddpi","ddpix","ddpiy"};
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56 private static List<String> omitIfNegative = Arrays.asList(omitIfNegativeArray);
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57
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58
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59 private String baseUrl="http://digilib.mpiwg-berlin.mpg.de/digitallibrary/servlet/Scaler";
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60
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61 /**
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62 * 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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63 * TODO should be part of a configuration/preference file
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64 * @return
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65 */
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66 public String getBaseUrl() {
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67 return baseUrl;
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68 }
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69
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70 /**
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71 * Setze die Basis url des Digilib-Scalers
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72 * @param baseUrl
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73 */
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74 public void setBaseUrl(String baseUrl) {
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75 this.baseUrl = baseUrl;
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76 }
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77
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78 private Label label;
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79
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80 /* (non-Javadoc)
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81 * @see de.mpg.mpiwg.itgroup.digilib.digiImage.IDigiImage#getLabel()
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82 */
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83 public Label getLabel() {
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84 return label;
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85 }
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86
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87 /* (non-Javadoc)
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88 * @see de.mpg.mpiwg.itgroup.digilib.digiImage.IDigiImage#setLabel(org.eclipse.swt.widgets.Label)
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89 */
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90 public void setLabel(Label label) {
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91 this.label = label;
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92 }
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93
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94 //private URL url;
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95 private Composite parent;
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96
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97 private DigiImageParameter dp;
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98
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99
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100 /**
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101 *
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102 * @param parent Composite where the image should be become a child of.
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103 * @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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104 * @param dp Set of Parameters which define how the image should be displayed.
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105 */
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106 public DigiImage(Composite parent, int style, DigiImageParameter dp) {
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107 //super(parent,style);
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108 label = new Label(parent, style);
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109 this.parent = parent;
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110 this.dp=dp;
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111 try {
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112 setNewURL(createUrlFromParameter(dp));
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113 } catch (MalformedURLException e) {
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114 // TODO Auto-generated catch block
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115 e.printStackTrace();
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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 /**
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121 * Sets the complete URL of the manipulated image and changes the image object in the composite.
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122 * @param url
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123 */
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124 private void setNewURL(URL url) {
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125 //this.url = url;
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126
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127
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128 InputStream is;
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129 try {
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130 is = url.openStream();
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131 } catch (IOException e) {
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132 // TODO Auto-generated catch block
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133 e.printStackTrace();
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134 return;
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135 }
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136 Image img = new Image(parent.getDisplay(),is);
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137 //Label label = new Label(parent, SWT.None);
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138 label.setImage(img);
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139
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140 label.setVisible(true);
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141 }
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142
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143
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144 /* (non-Javadoc)
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145 * @see de.mpg.mpiwg.itgroup.digilib.digiImage.IDigiImage#getParent()
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146 */
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147 public Composite getParent() {
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148 return parent;
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149 }
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150
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151
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152 /**
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153 * 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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154 * @param dp
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155 * @return
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156 * @throws MalformedURLException
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157 */
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158 private URL createUrlFromParameter(DigiImageParameter dp) throws MalformedURLException{
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159
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160 Map<String, String> qa = dp.createMapFromParameters(omitIfNegative);
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161
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162 List<String> queryArray = new ArrayList<String>();
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163 for(String key:qa.keySet()){
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164 queryArray.add(key+"="+qa.get(key));
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165 }
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166 String queryString = StringUtils.join(queryArray,"&");
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167
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168 String stringUrl=baseUrl+"?"+queryString;
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169 return new URL(stringUrl);
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170 }
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171
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172
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173
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174 /* (non-Javadoc)
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175 * @see de.mpg.mpiwg.itgroup.digilib.digiImage.IDigiImage#getParameter()
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176 */
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177 public DigiImageParameter getParameter() {
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178
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179 return dp;
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180 }
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181
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182 /* (non-Javadoc)
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183 * @see de.mpg.mpiwg.itgroup.digilib.digiImage.IDigiImage#setParameter(de.mpg.mpiwg.itgroup.digilib.digiImage.DigiImageParameter)
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184 */
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185 public void setParameter(DigiImageParameter dp) {
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186 this.dp=dp;
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187
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188 }
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189
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190 /* (non-Javadoc)
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191 * @see de.mpg.mpiwg.itgroup.digilib.digiImage.IDigiImage#redraw()
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192 */
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193 public void redraw(){
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194 try {
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195 setNewURL(createUrlFromParameter(dp));
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196 setSelection(new StructuredSelection(this));
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197 DigilibLinkEditorObservable.INSTANCE.imageHasChanged(this);
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198 } catch (MalformedURLException e) {
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199 // TODO Auto-generated catch block
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200 e.printStackTrace();
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201 }
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202 }
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203
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204
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205 private ZoomAreaRectangleListener rectangleListener=null;
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206
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207 /* (non-Javadoc)
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208 * @see de.mpg.mpiwg.itgroup.digilib.digiImage.IDigiImage#getRectangleListener()
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209 */
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210 public ZoomAreaRectangleListener getRectangleListener() {
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211
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212 return rectangleListener;
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213 }
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214
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215 /* (non-Javadoc)
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216 * @see de.mpg.mpiwg.itgroup.digilib.digiImage.IDigiImage#setRectangleListener(de.mpg.mpiwg.itgroup.digilib.manipulator.extensions.RectangleListener)
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217 */
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218 public void setRectangleListener(ZoomAreaRectangleListener rectangleListener) {
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219 this.rectangleListener = rectangleListener;
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220 }
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221
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222 /* (non-Javadoc)
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223 * @see org.eclipse.core.runtime.IAdaptable#getAdapter(java.lang.Class)
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224 *
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225 * Digiimage shows properties if asked to.
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226 */
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227 public Object getAdapter(Class adapter) {
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228 if (adapter == IPropertySource.class)
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229 return new DigiImageProperties(this);
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230 return null;
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231
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232 }
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233
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234 /* (non-Javadoc)
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235 * @see org.eclipse.jface.viewers.ISelectionProvider#addSelectionChangedListener(org.eclipse.jface.viewers.ISelectionChangedListener)
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236 * Digiimage registeres selelection changers
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237 */
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238 public void addSelectionChangedListener(ISelectionChangedListener listener) {
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239 selectionChangeListener.add(listener);
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240
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241 }
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242
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243 /* (non-Javadoc)
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244 * @see org.eclipse.jface.viewers.ISelectionProvider#getSelection()
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245 * Selection is the object itself.
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246 */
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247 public ISelection getSelection() {
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248
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249 return new StructuredSelection(this);
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250 }
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251
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252 public void removeSelectionChangedListener(
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253 ISelectionChangedListener listener) {
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254 selectionChangeListener.remove(listener);
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255
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256 }
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257
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258 /* (non-Javadoc)
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259 * @see org.eclipse.jface.viewers.ISelectionProvider#setSelection(org.eclipse.jface.viewers.ISelection)
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260 * Informs all listeners that selection has changed.
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261 */
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262 public void setSelection(ISelection selection) {
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263
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264 for (ISelectionChangedListener sl: selectionChangeListener){
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265
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266 SelectionChangedEvent event = new SelectionChangedEvent(this, selection);
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267 sl.selectionChanged(event);
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268
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269
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270 }
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271
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272 }
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273
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274
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275 }
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