Very CRUDE list of most recently used projections. I love the functionality, the UI could be nicer. Please do not remove, but instead improve!

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@10106 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: homann

src/gui/qgsprojectionselector.cpp

@@ -28,6 +28,7 @@
 #include <QHeaderView>
 #include <QResizeEvent>
 #include <QMessageBox>
+#include <QSettings>
 #include "qgslogger.h"
 
 const int NAME_COLUMN = 0;
@@ -54,11 +55,35 @@ QgsProjectionSelector::QgsProjectionSelector( QWidget* parent,
   lstCoordinateSystems->header()->setResizeMode( EPSG_COLUMN, QHeaderView::Stretch );
   lstCoordinateSystems->header()->resizeSection( QGIS_CRS_ID_COLUMN, 0 );
   lstCoordinateSystems->header()->setResizeMode( QGIS_CRS_ID_COLUMN, QHeaderView::Fixed );
+
+  // Read settings from persistent storage
+  QSettings settings;
+  mRecentProjections = settings.value("/UI/recentProjections").toStringList();
+ 
 }
 
 
 QgsProjectionSelector::~QgsProjectionSelector()
-{}
+{
+  // Save persistent list of projects
+  QSettings settings;
+  long crsId;
+
+  // Push current projection to front, only if set
+  crsId = selectedCrsId();
+  if ( crsId )
+  {
+    mRecentProjections.removeAll( QString::number( crsId ) );
+    mRecentProjections.prepend( QString::number( crsId ) );
+    // Prunse size of list
+    while ( mRecentProjections.size() > 4 )
+    {
+      mRecentProjections.removeLast();
+    }
+    // Save to file
+    settings.setValue( "/UI/recentProjections", mRecentProjections);
+  }
+}
 
 
 void QgsProjectionSelector::resizeEvent( QResizeEvent * theEvent )
@@ -99,6 +124,40 @@ void QgsProjectionSelector::showEvent( QShowEvent * theEvent )
     applyEPSGIDSelection();
   }
 
+  // Update buttons
+  pbnPopular1->setDisabled(true);
+  pbnPopular2->setDisabled(true);
+  pbnPopular3->setDisabled(true);
+  pbnPopular4->setDisabled(true);
+  pbnPopular1->hide();
+  pbnPopular2->hide();
+  pbnPopular3->hide();
+  pbnPopular4->hide();
+
+  if ( mRecentProjections.size() > 0) {
+    pbnPopular1->setText( getCrsIdName( mRecentProjections.at(0).toLong() ) );
+    pbnPopular1->setDisabled(false);
+    pbnPopular1->show();
+  }
+
+  if ( mRecentProjections.size() > 1) {
+    pbnPopular2->setText( getCrsIdName( mRecentProjections.at(1).toLong() ) );
+    pbnPopular2->setDisabled(false);
+    pbnPopular2->show();
+  }
+
+  if ( mRecentProjections.size() > 2) {
+    pbnPopular3->setText( getCrsIdName( mRecentProjections.at(2).toLong() ) );
+    pbnPopular3->setDisabled(false);
+    pbnPopular3->show();
+  }
+
+  if ( mRecentProjections.size() > 3) {
+    pbnPopular4->setText( getCrsIdName( mRecentProjections.at(3).toLong() ) );
+    pbnPopular4->setDisabled(false);
+    pbnPopular4->show();
+  }
+
   // Pass up the inheritance heirarchy
   QWidget::showEvent( theEvent );
 }
@@ -235,6 +294,26 @@ void QgsProjectionSelector::applyCRSNameSelection()
   }
 }
 
+QString QgsProjectionSelector::getCrsIdName( long theCrsId )
+{
+  if (
+    ( mProjListDone ) &&
+    ( mUserProjListDone )
+  )
+  {
+    QString myCRSIDString = QString::number( theCrsId );
+
+    QList<QTreeWidgetItem*> nodes = lstCoordinateSystems->findItems( myCRSIDString, Qt::MatchExactly | Qt::MatchRecursive, QGIS_CRS_ID_COLUMN );
+
+    if ( nodes.count() > 0 )
+    {
+      return nodes.first()->text(0);
+    }
+  }
+  return QString( "" );
+
+}
+
 void QgsProjectionSelector::applyEPSGIDSelection()
 {
   if (
@@ -761,6 +840,24 @@ void QgsProjectionSelector::coordinateSystemSelected( QTreeWidgetItem * theItem
   }
 }
 
+void QgsProjectionSelector::on_pbnPopular1_clicked()
+{
+      setSelectedCrsId( mRecentProjections.at(0).toLong() );
+}
+
+void QgsProjectionSelector::on_pbnPopular2_clicked()
+{
+      setSelectedCrsId(  mRecentProjections.at(1).toLong() );
+}
+void QgsProjectionSelector::on_pbnPopular3_clicked()
+{
+      setSelectedCrsId(  mRecentProjections.at(2).toLong() );
+}
+void QgsProjectionSelector::on_pbnPopular4_clicked()
+{
+      setSelectedCrsId( mRecentProjections.at(3).toLong() );
+}
+
 void QgsProjectionSelector::on_pbnFind_clicked()
 {
 

src/gui/qgsprojectionselector.h

@@ -14,6 +14,7 @@
 #include <ui_qgsprojectionselectorbase.h>
 
 #include <QSet>
+#include <QStringList>
 
 class QResizeEvent;
 
@@ -104,6 +105,11 @@ class GUI_EXPORT QgsProjectionSelector: public QWidget, private Ui::QgsProjectio
 
     void on_pbnFind_clicked();
 
+    void on_pbnPopular1_clicked();
+    void on_pbnPopular2_clicked();
+    void on_pbnPopular3_clicked();
+    void on_pbnPopular4_clicked();
+
   protected:
     /** Used to ensure the projection list view is actually populated */
     void showEvent( QShowEvent * theEvent );
@@ -189,6 +195,9 @@ class GUI_EXPORT QgsProjectionSelector: public QWidget, private Ui::QgsProjectio
      */
     long getLargestCRSIDMatch( QString theSql );
 
+    //! Returns name from CRS Id
+    QString getCrsIdName( long theCrsId );
+
     //! Has the Projection List been populated?
     bool mProjListDone;
 
@@ -216,6 +225,9 @@ class GUI_EXPORT QgsProjectionSelector: public QWidget, private Ui::QgsProjectio
     //! The set of OGC WMS CRSs that want to be applied to this widget
     QSet<QString> mCrsFilter;
 
+    //! Most recently used projections (trimmed at 25 entries)
+    QStringList mRecentProjections;
+
   private slots:
     /**private handler for when user selects a cs
      *it will cause wktSelected and sridSelected events to be spawned

src/plugins/delimited_text/qgsdelimitedtextplugingui.cpp

@@ -140,14 +140,14 @@ void QgsDelimitedTextPluginGui::updateFieldLists()
   if ( QFile::exists( txtFilePath->text() ) )
   {
     QFile *file = new QFile( txtFilePath->text() );
-    if ( file->open( QIODevice::ReadOnly ) )
+    if ( file->open( QIODevice::ReadOnly | QIODevice::Text ) )
     {
       // clear the field lists
       cmbXField->clear();
       cmbYField->clear();
       QTextStream stream( file );
       QString line;
-      line = stream.readLine(); // line of text excluding '\n'
+      line = readLine( stream ); // line of text excluding '\n'
       if ( txtDelimiter->text().length() > 0 )
       {
         QgsDebugMsg( QString( "Attempting to split the input line: %1 using delimiter %2" ).arg( line ).arg( txtDelimiter->text() ) );
@@ -212,13 +212,12 @@ void QgsDelimitedTextPluginGui::updateFieldLists()
       txtSample->insertPlainText( line + "\n" );
       // put a few more lines into the sample box
       int counter = 0;
-      while (
-        ( !( line = stream.readLine() ).isEmpty() ) &&
-        ( counter < 20 )
-      )
+      line = QgsDelimitedTextPluginGui::readLine( stream );
+      while ( not line.isEmpty() && ( counter < 20 ) )
       {
         txtSample->insertPlainText( line + "\n" );
         counter++;
+        line = QgsDelimitedTextPluginGui::readLine( stream );
       }
       // close the file
       file->close();
@@ -265,3 +264,52 @@ void QgsDelimitedTextPluginGui::on_txtDelimiter_textChanged( const QString & tex
     pbnParse->setEnabled( true );
   }
 }
+
+QString QgsDelimitedTextPluginGui::readLine( QTextStream & stream )
+{
+  QString buffer("");
+  QString c;
+
+  // Strip leading newlines
+
+  c = stream.read( 1 );
+  if ( c == NULL or c.size() == 0 )
+  {
+    // Reach end of file
+    return buffer;
+  }
+  while ( c == (char *)"\r" or c == (char *)"\n" )
+  {
+    c = stream.read( 1 );
+    if ( c == NULL or c.size() == 0 )
+    {
+      // Reach end of file
+      return buffer;
+    }
+  }
+  
+  // First non-newline character
+  buffer.append( c );
+
+  c = stream.read( 1 );
+  if ( c == NULL or c.size() == 0 )
+  {
+    // Reach end of file
+    return buffer;
+  }
+    
+  while ( not ( c == (char *)"\r" or c == (char *)"\n" ) )
+  {
+    
+    buffer.append( c );    
+    c = stream.read( 1 );
+    if ( c == NULL or c.size() == 0 )
+    {
+      // Reach end of file
+      return buffer;
+    }
+  }
+
+  return buffer;
+
+}

src/plugins/delimited_text/qgsdelimitedtextplugingui.h

@@ -14,6 +14,7 @@
 #define PLUGINGUI_H
 
 #include "ui_qgsdelimitedtextpluginguibase.h"
+#include <QTextStream>
 
 class QgisInterface;
 
@@ -27,6 +28,8 @@ class QgsDelimitedTextPluginGui : public QDialog, private Ui::QgsDelimitedTextPl
     QgsDelimitedTextPluginGui( QgisInterface * _qI, QWidget* parent = 0, Qt::WFlags fl = 0 );
     ~QgsDelimitedTextPluginGui();
 
+    static QString readLine( QTextStream & stream );
+
   public slots:
     void help();
 
@@ -53,4 +56,5 @@ class QgsDelimitedTextPluginGui : public QDialog, private Ui::QgsDelimitedTextPl
     void drawVectorLayer( QString, QString, QString );
 };
 
+
 #endif

src/ui/qgsprojectionselectorbase.ui

@@ -162,6 +162,34 @@
      </layout>
     </widget>
    </item>
+   <item row="3" column="0" >
+    <widget class="QPushButton" name="pbnPopular1">
+     <property name="text" >
+      <string>CRS ID : 100000</string>
+     </property>
+    </widget>
+   </item>     
+   <item row="4" column="0" >
+    <widget class="QPushButton" name="pbnPopular2">
+     <property name="text" >
+      <string>CRS ID : 3344</string>
+     </property>
+    </widget>
+   </item>     
+   <item row="5" column="0" >
+    <widget class="QPushButton" name="pbnPopular3">
+     <property name="text" >
+      <string>CRS ID : whatever</string>
+     </property>
+    </widget>
+   </item>     
+   <item row="6" column="0" >
+    <widget class="QPushButton" name="pbnPopular4">
+     <property name="text" >
+      <string>CRS ID : whatever</string>
+     </property>
+    </widget>
+   </item>     
   </layout>
  </widget>
  <layoutdefault spacing="6" margin="11" />