src/cx/fbn/nevernote/gui/TagLineEdit.java

   1 /*\r
   2  * This file is part of NeverNote \r
   3  * Copyright 2009 Randy Baumgarte\r
   4  * \r
   5  * This file may be licensed under the terms of of the\r
   6  * GNU General Public License Version 2 (the ``GPL'').\r
   7  *\r
   8  * Software distributed under the License is distributed\r
   9  * on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either\r
  10  * express or implied. See the GPL for the specific language\r
  11  * governing rights and limitations.\r
  12  *\r
  13  * You should have received a copy of the GPL along with this\r
  14  * program. If not, go to http://www.gnu.org/licenses/gpl.html\r
  15  * or write to the Free Software Foundation, Inc.,\r
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.\r
  17  *\r
  18 */\r
  19 \r
  20 package cx.fbn.nevernote.gui;\r
  21 \r
  22 import java.util.ArrayList;\r
  23 import java.util.List;\r
  24 import java.util.StringTokenizer;\r
  25 \r
  26 import com.evernote.edam.type.Tag;\r
  27 import com.trolltech.qt.core.QEvent;\r
  28 import com.trolltech.qt.core.QModelIndex;\r
  29 import com.trolltech.qt.gui.QLineEdit;\r
  30 \r
  31 import cx.fbn.nevernote.Global;\r
  32 \r
  33 public class TagLineEdit extends QLineEdit {\r
  34         private String text;\r
  35         private final boolean changed;\r
  36         public Signal2<List<String>, String> text_changed = new Signal2<List<String>, String>();\r
  37         public TagLineCompleter tagCompleter;\r
  38         public Signal0 focusLost = new Signal0();\r
  39         public String currentCompleterSelection;\r
  40         \r
  41         public TagLineEdit(List<Tag> allTags) {\r
  42                 textChanged.connect(this, "textChanged(String)");\r
  43                 tagCompleter = new TagLineCompleter(this);\r
  44                 text_changed.connect(tagCompleter, "update(List, String)");\r
  45                 tagCompleter.activated.connect(this, "completeText(String)");\r
  46                 tagCompleter.highlightedIndex.connect(this, "completerSelected(QModelIndex)");\r
  47                 changed = false;\r
  48                 currentCompleterSelection = null;\r
  49         }\r
  50         \r
  51 \r
  52         public boolean hasChanged() {\r
  53                 return changed;\r
  54         }\r
  55         \r
  56         @SuppressWarnings("unused")\r
  57         private void textChanged(String t) {\r
  58                 text = t;\r
  59                 int cursor_pos = cursorPosition();\r
  60                 String temp_text = text.substring(0,cursor_pos);\r
  61                 int delimeter = temp_text.trim().lastIndexOf(Global.tagDelimeter);\r
  62                 String prefix = "";\r
  63                 if (delimeter > 0)\r
  64                    prefix = temp_text.substring(delimeter+1).trim();\r
  65                 else\r
  66                         prefix = temp_text.trim();\r
  67                 \r
  68                 List<String> newTags = new ArrayList<String>();\r
  69                 List<String> currentTags = new ArrayList<String>();\r
  70                 String list[] = text.split(Global.tagDelimeter);\r
  71                 for (String element : list) {\r
  72                         currentTags.add(element.trim());\r
  73                 }\r
  74         \r
  75                 text_changed.emit(currentTags, prefix.trim());\r
  76 \r
  77                 \r
  78         }\r
  79         \r
  80         // This method is used to store the current selection from the completer.  It is\r
  81         // saved until later in case focus is lost while one is selected, but Enter is never pressed.\r
  82         @SuppressWarnings("unused")\r
  83         private void completerSelected(QModelIndex model) {\r
  84                 currentCompleterSelection = null;\r
  85                 if (model == null)\r
  86                         return;\r
  87                 tagCompleter.setCurrentRow(model.row());\r
  88                 currentCompleterSelection = tagCompleter.currentCompletion();\r
  89                 tagCompleter.setCurrentRow(model.row());\r
  90         }\r
  91         \r
  92         public void  completeText(String text){\r
  93                 int cursor_pos = cursorPosition();\r
  94                 String before_text = text().substring(0,cursor_pos);\r
  95                 String after_text = text().substring(cursor_pos) +" " +Global.tagDelimeter;\r
  96                 int prefix_len = before_text.lastIndexOf(Global.tagDelimeter);\r
  97                 if (prefix_len == -1) {\r
  98                         prefix_len = cursor_pos;\r
  99                         before_text = "";\r
 100                 } else {\r
 101                         before_text = before_text.substring(0, prefix_len);\r
 102                 }\r
 103 \r
 104                 setText(rebuildTags(before_text+Global.tagDelimeter+text+Global.tagDelimeter+after_text));\r
 105 //              setText(before_text +text +Global.tagDelimeter +" " +after_text);\r
 106 //              setCursorPosition(cursor_pos - prefix_len + text().length() +2);\r
 107                 setCursorPosition(text().length());\r
 108         }\r
 109 \r
 110         public void setTagList(List<Tag> t) {\r
 111                 tagCompleter.resetList();\r
 112                 tagCompleter.setTagList(t);\r
 113         }\r
 114         \r
 115         @Override\r
 116         public boolean event(QEvent e) {\r
 117                 if (e.type().equals(QEvent.Type.FocusOut)) {\r
 118                         \r
 119                         focusLost.emit();\r
 120                 }\r
 121                 return super.event(e);\r
 122         }\r
 123         \r
 124         private String rebuildTags(String tags) {\r
 125                 StringBuffer tagBuffer = new StringBuffer(tags.length() *2);\r
 126                 StringTokenizer tokens = new StringTokenizer (tags, Global.tagDelimeter);\r
 127                 boolean first = true;\r
 128                 while (tokens.hasMoreElements()) {\r
 129                         String token = tokens.nextToken().trim();\r
 130                         if (!token.equals("")) {\r
 131                                 if (!first)\r
 132                                         tagBuffer.append(Global.tagDelimeter+ " ");\r
 133                                 first = false;\r
 134                                 tagBuffer.append(token);\r
 135                         }\r
 136                 }\r
 137                 return tagBuffer.toString();\r
 138         }\r
 139 }\r