tagging/detagging of symbols in Style Manager done

Author: Arunmozhi

src/core/symbology-ng/qgsstylev2.cpp

@@ -400,28 +400,6 @@ QStringList QgsStyleV2::symbolsOfGroup( int groupid )
   return symbols;
 }
 
-QgsSymbolTagMap QgsStyleV2::symbolTags()
-{
-  QgsSymbolTagMap tags;
-  sqlite3* db = openDB( mFileName );
-  if ( db == NULL )
-  {
-    QgsDebugMsg( "Cannot open DB to get the tags" );
-    return QgsSymbolTagMap();
-  }
-  sqlite3_stmt *ppStmt;
-  char *query = sqlite3_mprintf( "SELECT * FROM tag;" );
-  int nErr = sqlite3_prepare_v2( db, query, -1, &ppStmt, NULL );
-  while ( nErr == SQLITE_OK && sqlite3_step( ppStmt ) == SQLITE_ROW )
-  {
-    QString tag = QString( reinterpret_cast<const char*>( sqlite3_column_text( ppStmt, TagName ) ) );
-    tags.insert( sqlite3_column_int( ppStmt, TagId ), tag );
-  }
-  sqlite3_finalize( ppStmt );
-  sqlite3_close( db );
-  return tags;
-}
-
 QStringList QgsStyleV2::symbolsWithTag( int tagid )
 {
   QStringList symbols;
@@ -642,7 +620,7 @@ bool QgsStyleV2::tagSymbol( QString symbol, QStringList tags )
     return false;
   }
 
-  foreach ( QString tag, tags )
+  foreach ( const QString &tag, tags )
   {
     int tagid;
     char *zErr = 0;
@@ -697,7 +675,7 @@ bool QgsStyleV2::detagSymbol( QString symbol, QStringList tags )
   }
   sqlite3_finalize( ppStmt );
 
-  foreach ( QString tag, tags )
+  foreach ( const QString &tag, tags )
   {
     int tagid = 0;
     QByteArray tagArray = tag.toUtf8();
@@ -725,3 +703,46 @@ bool QgsStyleV2::detagSymbol( QString symbol, QStringList tags )
   return true;
 }
 
+QStringList QgsStyleV2::tagsOfSymbol( QString symbol )
+{
+  QStringList tagList;
+  QByteArray array = symbol.toUtf8();
+  char *query;
+  sqlite3_stmt *ppStmt;
+  int symbolid;
+  sqlite3 *db = openDB( mFileName );
+  if ( db == NULL )
+  {
+    QgsDebugMsg( "Sorry! Cannot open DB for getting the tags." );
+    return QStringList();
+  }
+  // get the symbol id
+  query = sqlite3_mprintf( "SELECT id FROM symbol WHERE name='%q';", array.constData() );
+  int nErr = sqlite3_prepare_v2( db, query, -1, &ppStmt, NULL );
+  if ( nErr == SQLITE_OK && sqlite3_step( ppStmt ) == SQLITE_ROW )
+  {
+    symbolid = sqlite3_column_int( ppStmt, 0 );
+  }
+  sqlite3_finalize( ppStmt );
+  // get the ids of tags for the symbol
+  query = sqlite3_mprintf( "SELECT tag_id FROM tagmap WHERE symbol_id=%d;", symbolid );
+  nErr = sqlite3_prepare_v2( db, query, -1, &ppStmt, NULL );
+  while ( nErr == SQLITE_OK && sqlite3_step( ppStmt ) == SQLITE_ROW )
+  {
+    int tagid = sqlite3_column_int( ppStmt, 0 );
+    char *subquery;
+    sqlite3_stmt *ppStmt2;
+    subquery = sqlite3_mprintf( "SELECT name FROM tag WHERE id=%d;", tagid );
+    int pErr = sqlite3_prepare_v2( db, subquery, -1, &ppStmt2, NULL );
+    if ( pErr == SQLITE_OK && sqlite3_step( ppStmt2 ) == SQLITE_ROW )
+    {
+      QString tag = QString( reinterpret_cast<const char*>( sqlite3_column_text( ppStmt2, 0 ) ) );
+      tagList.append( tag );
+    }
+    sqlite3_finalize( ppStmt2 );
+  }
+  sqlite3_finalize( ppStmt );
+  sqlite3_close( db );
+
+  return tagList;
+}

src/core/symbology-ng/qgsstylev2.h

@@ -32,7 +32,6 @@ class QDomElement;
 
 typedef QMap<QString, QgsVectorColorRampV2* > QgsVectorColorRampV2Map;
 typedef QMap<int, QString> QgsSymbolGroupMap;
-typedef QMap<int, QString> QgsSymbolTagMap;
 
 // Enumeraters representing sqlite DB  columns
 enum SymbolTable { SymbolId, SymbolName, SymbolXML, SymbolGroupId };
@@ -84,8 +83,6 @@ class CORE_EXPORT QgsStyleV2
     QgsSymbolGroupMap groupNames( QString parent = "" );
     //! returns the symbolnames of a given groupid
     QStringList symbolsOfGroup( int groupid );
-    //! returns the tags in the DB
-    QgsSymbolTagMap symbolTags();
     //! returns the symbol names with which have the given tag
     QStringList symbolsWithTag( int tagid );
     //! adds a new group and returns the group's id
@@ -148,6 +145,9 @@ class CORE_EXPORT QgsStyleV2
     //! detags the symbol with the given list
     bool detagSymbol( QString symbol, QStringList tags );
 
+    //! return the tags associated with the symbol
+    QStringList tagsOfSymbol( QString symbol );
+
   protected:
 
     QgsSymbolV2Map mSymbols;

src/gui/symbology-ng/qgsstylev2managerdialog.cpp

@@ -75,6 +75,12 @@ QgsStyleV2ManagerDialog::QgsStyleV2ManagerDialog( QgsStyleV2* style, QWidget* pa
   listItems->setModel( model );
 
   connect( model, SIGNAL( itemChanged( QStandardItem* ) ), this, SLOT( itemChanged( QStandardItem* ) ) );
+  // TODO take up the selectiopn model for the symbols
+  // connect currentChanged signal to a slot which would populate the tags for that symbol
+  // as comma seperated values in tagLineEdit and fill the mTagList
+  //
+  connect( listItems->selectionModel(), SIGNAL( currentChanged( const QModelIndex&, const QModelIndex& ) ),
+      this, SLOT( symbolSelected( const QModelIndex& ) ) );
 
   populateTypes();
 
@@ -105,6 +111,7 @@ QgsStyleV2ManagerDialog::QgsStyleV2ManagerDialog( QgsStyleV2* style, QWidget* pa
   populateList();
 
   connect( searchBox, SIGNAL( textChanged( QString ) ), this, SLOT( filterSymbols( QString ) ) );
+  connect( tagBtn, SIGNAL( clicked() ), this, SLOT( tagsChanged() ) );
 
 }
 
@@ -622,7 +629,7 @@ void QgsStyleV2ManagerDialog::populateGroups()
   QStandardItem *tag = new QStandardItem( "Smart Groups" );
   tag->setData( "tags" );
   tag->setEditable( false );
-  buildTagTree( tag );
+  // TODO populate/build smart groups
   model->appendRow( tag );
 
 }
@@ -641,19 +648,6 @@ void QgsStyleV2ManagerDialog::buildGroupTree( QStandardItem* &parent )
   }
 }
 
-void QgsStyleV2ManagerDialog::buildTagTree( QStandardItem* &parent )
-{
-  QgsSymbolTagMap tags = mStyle->symbolTags();
-  QgsSymbolTagMap::const_iterator i = tags.constBegin();
-  while ( i != tags.constEnd() )
-  {
-    QStandardItem *item = new QStandardItem( i.value() );
-    item->setData( i.key() );
-    parent->appendRow( item );
-    ++i;
-  }
-}
-
 void QgsStyleV2ManagerDialog::groupChanged( const QModelIndex& index  )
 {
   QStringList symbolNames;
@@ -933,7 +927,8 @@ void QgsStyleV2ManagerDialog::regrouped( QStandardItem *item )
     regrouped = mStyle->regroup( symbolName, 0 );
   if ( !regrouped )
   {
-    int er = QMessageBox::critical( this, tr( "Database Error"), tr( "There was a problem with the Symbols database while regrouping." ) );
+    int er = QMessageBox::critical( this, tr( "Database Error"),
+        tr( "There was a problem with the Symbols database while regrouping." ) );
     // call the slot again to get back to normal
     if ( er )
       groupSymbolsAction();
@@ -961,3 +956,38 @@ void QgsStyleV2ManagerDialog::filterSymbols( QString qword )
   QStringList symbols = mStyle->findSymbols( qword );
   populateSymbols( symbols );
 }
+
+void QgsStyleV2ManagerDialog::tagsChanged()
+{
+  QStringList addtags;
+  QStringList removetags;
+
+  QStringList oldtags = mTagList;
+  QStringList newtags = tagsLineEdit->text().split( ",", QString::SkipEmptyParts );
+
+  // compare old with new to find removed tags
+  foreach( const QString &tag, oldtags )
+  {
+    if ( !newtags.contains( tag ) )
+      removetags.append( tag );
+  }
+  if ( removetags.size() > 0 )
+    mStyle->detagSymbol( currentItemName(), removetags );
+
+  // compare new with old to find added tags
+  foreach( const QString &tag, newtags )
+  {
+    if( !oldtags.contains( tag ) )
+      addtags.append( tag );
+  }
+  if ( addtags.size() > 0 )
+    mStyle->tagSymbol( currentItemName(), addtags );
+}
+
+void QgsStyleV2ManagerDialog::symbolSelected( const QModelIndex& index )
+{
+  tagsLineEdit->clear();
+  QStandardItem *item = static_cast<QStandardItemModel*>( listItems->model() )->itemFromIndex( index );
+  mTagList = mStyle->tagsOfSymbol( item->data().toString() );
+  tagsLineEdit->setText( mTagList.join( "," ) );
+}

src/gui/symbology-ng/qgsstylev2managerdialog.h

@@ -63,6 +63,12 @@ class GUI_EXPORT QgsStyleV2ManagerDialog : public QDialog, private Ui::QgsStyleV
     //! filter the symbols based on input search term
     void filterSymbols( QString );
 
+    //! Listen to tag changes
+    void tagsChanged();
+
+    //! Perform symbol specific tasks when selected
+    void symbolSelected( const QModelIndex& );
+
   protected:
 
     //! populate combo box with known style items (symbols, color ramps)
@@ -72,8 +78,6 @@ class GUI_EXPORT QgsStyleV2ManagerDialog : public QDialog, private Ui::QgsStyleV
     void populateGroups();
     //! build the groups tree
     void buildGroupTree( QStandardItem* &parent );
-    //! build the tag tree
-    void buildTagTree( QStandardItem* &parent );
     //! to set symbols checked when in editing mode
     void setSymbolsChecked( QStringList );
 
@@ -105,6 +109,9 @@ class GUI_EXPORT QgsStyleV2ManagerDialog : public QDialog, private Ui::QgsStyleV
 
     //! Mode to display the symbol list
     bool mGrouppingMode;
+
+    //! space to store symbol tags
+    QStringList mTagList;
 };
 
 #endif

src/ui/qgsstylev2managerdialogbase.ui

@@ -292,6 +292,13 @@
      <item>
       <widget class="QLineEdit" name="tagsLineEdit"/>
      </item>
+     <item>
+      <widget class="QPushButton" name="tagBtn">
+       <property name="text">
+        <string>Apply Tags</string>
+       </property>
+      </widget>
+     </item>
     </layout>
    </item>
   </layout>