bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/widgets/FileOrDirectorySelectionWidget.java

   1 package org.simantics.utils.ui.widgets;
   2
   3 import java.io.File;
   4 import java.util.ArrayList;
   5 import java.util.List;
   6
   7 import org.eclipse.jface.layout.GridDataFactory;
   8 import org.eclipse.swt.SWT;
   9 import org.eclipse.swt.events.ModifyEvent;
  10 import org.eclipse.swt.events.ModifyListener;
  11 import org.eclipse.swt.events.SelectionAdapter;
  12 import org.eclipse.swt.events.SelectionEvent;
  13 import org.eclipse.swt.layout.GridData;
  14 import org.eclipse.swt.layout.GridLayout;
  15 import org.eclipse.swt.widgets.Button;
  16 import org.eclipse.swt.widgets.Composite;
  17 import org.eclipse.swt.widgets.Group;
  18 import org.eclipse.swt.widgets.Text;
  19
  20 public abstract class FileOrDirectorySelectionWidget extends Composite{
  21
  22         Text fileText;
  23         String filename[];
  24
  25         private List<FileSelectionListener> listeners = new ArrayList<FileSelectionListener>();
  26
  27         public FileOrDirectorySelectionWidget(Composite parent, String name,int style) {
  28                 super(parent, style);
  29                 this.setLayout(new GridLayout(1,false));
  30                 GridDataFactory.fillDefaults().grab(true, false).align(SWT.FILL, SWT.TOP).applyTo(this);
  31
  32                 Group fileGroup = new Group(this, SWT.NONE);
  33                 GridDataFactory.fillDefaults().grab(true, false).align(SWT.FILL, SWT.TOP).applyTo(fileGroup);
  34
  35                 fileGroup.setText(name);
  36                 fileGroup.setLayout(new GridLayout(2, false));
  37
  38                 fileText = new Text(fileGroup, SWT.SINGLE|SWT.BORDER);
  39                 GridData data = new GridData();
  40                 data.grabExcessHorizontalSpace = true;
  41                 data.horizontalAlignment = SWT.FILL;
  42                 fileText.setLayoutData(data);
  43
  44                 Button browseButton = new Button(fileGroup, SWT.PUSH);
  45                 browseButton.setText("Browse");
  46                 data = new GridData();
  47                 browseButton.setLayoutData(data);
  48
  49
  50
  51                 browseButton.addSelectionListener(new SelectionAdapter() {
  52                         @Override
  53                         public void widgetSelected(SelectionEvent e) {
  54                                 String[] name = openDialog();
  55                                 if (name != null) {
  56                                         setFilename(name,true);
  57                                 }
  58                         }
  59                 });
  60
  61                 fileText.addModifyListener(new ModifyListener() {
  62
  63                         @Override
  64                         public void modifyText(ModifyEvent e) {
  65                                 String file = fileText.getText();
  66                                 String files[] = file.split(",");
  67                                 for (int i = 0; i < files.length; i++) {
  68                                         files[i] = files[i].trim();
  69                                 }
  70                                 setFilename(files, false);
  71
  72                         }
  73                 });
  74         }
  75
  76         protected abstract String[] openDialog();
  77
  78         protected abstract boolean isValid(File file);
  79
  80         protected void setFilename(String[] filename) {
  81                 setFilename(filename, true);
  82         }
  83
  84         protected void setFilename(String[] filename, boolean update) {
  85                 String text = "";
  86                 if (filename.length < 6) {
  87                         for (String s : filename) {
  88                                 text += s + ",";
  89                         }
  90                         if (text.length() > 2)
  91                                 text = text.substring(0, text.length() - 1);
  92                 } else {
  93                         text = filename[0] + " and " + (filename.length -1) + " other files.";
  94                 }
  95
  96                 if (update && !text.equals(fileText.getText()))
  97                         fileText.setText(text);
  98
  99                 boolean accept = true;
 100                 for (String s : filename){
 101                         File file = new File(s);
 102                         if (!isValid(file)) {
 103                                 accept = false;
 104                                 break;
 105                         }
 106                 }
 107                 if (accept)
 108                         this.filename = filename;
 109                 else
 110                         this.filename = null;
 111
 112                 for (FileSelectionListener l : listeners) {
 113                         l.fileSelected(this, this.filename);
 114                 }
 115         }
 116
 117         public String[] getFilename() {
 118                 return filename;
 119         }
 120
 121         public void addListener(FileSelectionListener listener) {
 122                 this.listeners.add(listener);
 123         }
 124
 125         public void removeListener(FileSelectionListener listener) {
 126                 this.listeners.remove(listener);
 127         }
 128
 129
 130 }