bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/widgets/Label.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2012 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.browsing.ui.swt.widgets;\r
  13 \r
  14 import org.eclipse.swt.graphics.Color;\r
  15 import org.eclipse.swt.widgets.Composite;\r
  16 import org.eclipse.swt.widgets.Control;\r
  17 import org.simantics.Simantics;\r
  18 import org.simantics.browsing.ui.swt.widgets.impl.ReadFactory;\r
  19 import org.simantics.browsing.ui.swt.widgets.impl.WidgetSupport;\r
  20 import org.simantics.db.ReadGraph;\r
  21 import org.simantics.db.common.request.ParametrizedRead;\r
  22 import org.simantics.db.common.request.UniqueRead;\r
  23 import org.simantics.db.exception.DatabaseException;\r
  24 import org.simantics.db.management.ISessionContext;\r
  25 import org.simantics.db.procedure.Listener;\r
  26 import org.simantics.utils.ui.SWTUtils;\r
  27 \r
  28 public class Label extends WidgetImpl {\r
  29 \r
  30         private ReadFactory<?, String> textFactory;\r
  31         private ReadFactory<?, Color> colorFactory;\r
  32         \r
  33         final private org.eclipse.swt.widgets.Label label;\r
  34         \r
  35         public Label(Composite parent, WidgetSupport support, int style) {\r
  36                 super(support);\r
  37                 label = new org.eclipse.swt.widgets.Label(parent, style);\r
  38                 support.register(this);\r
  39         }\r
  40         \r
  41         public void setTextFactory(ReadFactory<?, String> textFactory) {\r
  42                 this.textFactory = textFactory;\r
  43         }\r
  44         \r
  45         public void setForegroundFactory(ReadFactory<?, Color> colorFactory) {\r
  46                 this.colorFactory = colorFactory;\r
  47         }\r
  48 \r
  49         public org.eclipse.swt.widgets.Label getWidget() {\r
  50                 return label;\r
  51         }\r
  52         \r
  53         @Override\r
  54         public Control getControl() {\r
  55                 return label;\r
  56         }\r
  57 \r
  58         @Override\r
  59         public void setInput(ISessionContext context, Object input) {\r
  60 \r
  61                 if(textFactory != null) {\r
  62                         textFactory.listen(context, input, new Listener<String>() {\r
  63 \r
  64                                 public void exception(final Throwable t) {\r
  65                                         SWTUtils.asyncExec(label, new Runnable() {\r
  66 \r
  67                                                 @Override\r
  68                                                 public void run() {\r
  69                                                         if(isDisposed()) return;\r
  70 //                                                      System.out.println("Button received new text: " + text);\r
  71                                                         label.setText(t.toString());\r
  72                                                 }\r
  73 \r
  74                                         });\r
  75                                 }\r
  76 \r
  77                                 @Override\r
  78                                 public void execute(final String text) {\r
  79                                         SWTUtils.asyncExec(label, new Runnable() {\r
  80 \r
  81                                                 @Override\r
  82                                                 public void run() {\r
  83                                                         if(isDisposed()) return;\r
  84                                                         label.setText(text);\r
  85                                                         // TODO: how can we resize without this knife??\r
  86                                                         label.getParent().layout();\r
  87                                                         label.getParent().getParent().layout();\r
  88                                                 }\r
  89 \r
  90                                         });\r
  91                                 }\r
  92 \r
  93                                 @Override\r
  94                                 public boolean isDisposed() {\r
  95                                         return label.isDisposed();\r
  96                                 }\r
  97 \r
  98                         });\r
  99                 }\r
 100                 \r
 101                 if(colorFactory != null) {\r
 102                         colorFactory.listen(context, input, new Listener<Color>() {\r
 103 \r
 104                                 @Override\r
 105                                 public void exception(Throwable t) {\r
 106                                         t.printStackTrace();\r
 107                                 }\r
 108 \r
 109                                 @Override\r
 110                                 public void execute(final Color color) {\r
 111                                         label.getDisplay().asyncExec(new Runnable() {\r
 112 \r
 113                                                 @Override\r
 114                                                 public void run() {\r
 115                                                         if(isDisposed()) return;\r
 116                                                         label.setForeground(color);\r
 117                                                 }\r
 118 \r
 119                                         });\r
 120                                 }\r
 121 \r
 122                                 @Override\r
 123                                 public boolean isDisposed() {\r
 124                                         return label.isDisposed();\r
 125                                 }\r
 126 \r
 127                         });\r
 128                 }\r
 129                 \r
 130         }\r
 131         \r
 132     public <T> void setText(final ParametrizedRead<T, String> read) {\r
 133         \r
 134         Simantics.getSession().async(new UniqueRead<String>() {\r
 135 \r
 136                 @Override\r
 137                 public String perform(ReadGraph graph) throws DatabaseException {\r
 138                         T input = support.getInput(graph);\r
 139                         return graph.syncRequest(read.get(input));\r
 140                 }\r
 141 \r
 142         }, new Listener<String>() {\r
 143 \r
 144                 @Override\r
 145                 public void exception(Throwable t) {\r
 146                         t.printStackTrace();\r
 147                 }\r
 148 \r
 149                 @Override\r
 150                 public void execute(final String text) {\r
 151 \r
 152                         if(isDisposed()) return;\r
 153 \r
 154                         label.getDisplay().asyncExec(new Runnable() {\r
 155 \r
 156                                 @Override\r
 157                                 public void run() {\r
 158                                         label.setText(text);\r
 159                                 }\r
 160 \r
 161                         });\r
 162                 }\r
 163 \r
 164                 @Override\r
 165                 public boolean isDisposed() {\r
 166                         return label.isDisposed();\r
 167                 }\r
 168 \r
 169         });\r
 170 \r
 171     }\r
 172         \r
 173         public void setText(String text) {\r
 174                 label.setText(text);\r
 175         }\r
 176 \r
 177 }\r