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

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