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 \r
  25 import com.evernote.edam.type.Tag;\r
  26 import com.trolltech.qt.core.QEvent;\r
  27 import com.trolltech.qt.core.QModelIndex;\r
  28 import com.trolltech.qt.gui.QLineEdit;\r
  29 \r
  30 import cx.fbn.nevernote.Global;\r
  31 \r
  32 public class TagLineEdit extends QLineEdit {\r
  33         private String text;\r
  34         private final boolean changed;\r
  35         public Signal2<List<String>, String> text_changed = new Signal2<List<String>, String>();\r
  36         public TagLineCompleter tagCompleter;\r
  37         public Signal0 focusLost = new Signal0();\r
  38         public String currentCompleterSelection;\r
  39         \r
  40         public TagLineEdit(List<Tag> allTags) {\r
  41                 textChanged.connect(this, "textChanged(String)");\r
  42                 tagCompleter = new TagLineCompleter(this);\r
  43                 text_changed.connect(tagCompleter, "update(List, String)");\r
  44                 tagCompleter.activated.connect(this, "completeText(String)");\r
  45                 tagCompleter.highlightedIndex.connect(this, "completerSelected(QModelIndex)");\r
  46                 changed = false;\r
  47                 currentCompleterSelection = null;\r
  48         }\r
  49         \r
  50         public boolean hasChanged() {\r
  51                 return changed;\r
  52         }\r
  53         \r
  54         @SuppressWarnings("unused")\r
  55         private void textChanged(String t) {\r
  56                 text = t;\r
  57                 int cursor_pos = cursorPosition();\r
  58                 String temp_text = text.substring(0,cursor_pos);\r
  59                 int delimeter = temp_text.trim().lastIndexOf(Global.tagDelimeter);\r
  60                 String prefix = "";\r
  61                 if (delimeter > 0)\r
  62                    prefix = temp_text.substring(delimeter+1).trim();\r
  63                 else\r
  64                         prefix = temp_text.trim();\r
  65                 \r
  66                 List<String> newTags = new ArrayList<String>();\r
  67                 List<String> currentTags = new ArrayList<String>();\r
  68                 String list[] = text.split(Global.tagDelimeter);\r
  69                 for (String element : list) {\r
  70                         currentTags.add(element.trim());\r
  71                 }\r
  72         \r
  73                 text_changed.emit(currentTags, prefix.trim());\r
  74 \r
  75                 \r
  76         }\r
  77         \r
  78         // This method is used to store the current selection from the completer.  It is\r
  79         // saved until later in case focus is lost while one is selected, but Enter is never pressed.\r
  80         @SuppressWarnings("unused")\r
  81         private void completerSelected(QModelIndex model) {\r
  82                 currentCompleterSelection = null;\r
  83                 if (model == null)\r
  84                         return;\r
  85                 tagCompleter.setCurrentRow(model.row());\r
  86                 currentCompleterSelection = tagCompleter.currentCompletion();\r
  87                 tagCompleter.setCurrentRow(model.row());\r
  88         }\r
  89         \r
  90         public void  completeText(String text){\r
  91                 int cursor_pos = cursorPosition();\r
  92                 String before_text = text().substring(0,cursor_pos);\r
  93                 String after_text = text().substring(cursor_pos);\r
  94                 int prefix_len = before_text.lastIndexOf(Global.tagDelimeter);\r
  95                 if (prefix_len == -1) {\r
  96                         prefix_len = cursor_pos;\r
  97                         before_text = "";\r
  98                 } else {\r
  99                         before_text = before_text.substring(0,cursor_pos-1);\r
 100                 }\r
 101                 int nextTagPos = after_text.indexOf(Global.tagDelimeter);\r
 102                 if (nextTagPos == -1) {\r
 103                         nextTagPos = 0;\r
 104                         after_text = "";\r
 105                 }\r
 106                 setText(before_text +text +Global.tagDelimeter +" " +after_text);\r
 107                 setCursorPosition(cursor_pos - prefix_len + text().length() +2);\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                         focusLost.emit();\r
 119                 }\r
 120                 return super.event(e);\r
 121         }\r
 122 }\r