QtCollider/widgets/QcTextEdit.cpp

   1 /************************************************************************
   2 *
   3 * Copyright 2010 Jakob Leben (jakob.leben@gmail.com)
   4 *
   5 * This file is part of SuperCollider Qt GUI.
   6 *
   7 * This program is free software: you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License as published by
   9 * the Free Software Foundation, either version 3 of the License, or
  10 * (at your option) any later version.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU General Public License
  18 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 *
  20 ************************************************************************/
  21
  22 #include "QcTextEdit.h"
  23 #include "../QcWidgetFactory.h"
  24
  25 #include <QFile>
  26 #include <QKeyEvent>
  27 #include <QApplication>
  28
  29 class QcTextEditFactory : public QcWidgetFactory<QcTextEdit>
  30 {
  31   void initialize( QWidgetProxy *p, QcTextEdit *w, QList<QVariant> & ) {
  32     p->setMouseEventWidget( w->viewport() );
  33   }
  34 };
  35
  36 static QcTextEditFactory factory;
  37
  38 QcTextEdit::QcTextEdit() : _interpretSelection(false)
  39 {
  40   connect( this, SIGNAL(interpret(QString)),
  41            qApp, SLOT(interpret(QString)),
  42            Qt::QueuedConnection );
  43 }
  44
  45
  46 QString QcTextEdit::documentFilename() const
  47 {
  48   return _document;
  49 }
  50
  51 void QcTextEdit::setDocument( const QString &filename )
  52 {
  53   QFile file( filename );
  54   if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
  55     return;
  56   QByteArray data = file.readAll();
  57   setText( data );
  58   _document = filename;
  59 }
  60
  61 int QcTextEdit::selectionStart() const
  62 {
  63   return textCursor().selectionStart();
  64 }
  65
  66 int QcTextEdit::selectionSize() const
  67 {
  68   QTextCursor cursor = textCursor();
  69   return cursor.selectionEnd() - cursor.selectionStart();
  70 }
  71
  72 void QcTextEdit::select( int start, int size )
  73 {
  74   if( start < 0 ) start = 0;
  75
  76   QTextCursor cursor( document() );
  77
  78   cursor.movePosition( QTextCursor::Right, QTextCursor::MoveAnchor, start );
  79   cursor.movePosition( size > 0 ? QTextCursor::Right : QTextCursor::Left,
  80                        QTextCursor::KeepAnchor, qAbs(size) );
  81
  82   setTextCursor( cursor );
  83 }
  84
  85 QString QcTextEdit::selectedString() const
  86 {
  87   // NOTE QTextCuror.selectedText() contains unicode paragraph separators U+2029
  88   // instead of newline \n characters
  89   return textCursor().selectedText().replace( QChar( 0x2029 ), QChar( '\n' ) );
  90 }
  91
  92 void QcTextEdit::replaceSelectedText( const QString &string )
  93 {
  94   QTextCursor cursor( textCursor() );
  95   if( cursor.hasSelection() ) {
  96     cursor.removeSelectedText();
  97     cursor.insertText( string );
  98   }
  99 }
 100
 101 void QcTextEdit::setTextFont( const QFont &f )
 102 {
 103   QTextCharFormat format;
 104   format.setFont( f );
 105
 106   QTextCursor cursor( document() );
 107   cursor.select( QTextCursor::Document );
 108   cursor.setCharFormat( format );
 109
 110   QTextEdit::setFont(f);
 111 }
 112
 113 void QcTextEdit::setTextColor( const QColor &color )
 114 {
 115   QTextCharFormat format;
 116   format.setForeground( color );
 117
 118   QTextCursor cursor( document() );
 119   cursor.select( QTextCursor::Document );
 120   cursor.setCharFormat( format );
 121 }
 122
 123 void QcTextEdit::setRangeColor( const VariantList &list )
 124 {
 125   if( list.data.count() < 3 ) return;
 126   QColor c = list.data[0].value<QColor>();
 127   int start = list.data[1].toInt();
 128   int size = list.data[2].toInt();
 129
 130   QTextCharFormat format;
 131   format.setForeground( c );
 132
 133   QTextCursor cursor( document() );
 134   cursor.setPosition( start );
 135   cursor.setPosition( start + size, QTextCursor::KeepAnchor );
 136   cursor.setCharFormat( format );
 137 }
 138
 139 void QcTextEdit::setRangeFont( const VariantList & list )
 140 {
 141   if( list.data.count() < 3 ) return;
 142   QFont f = list.data[0].value<QFont>();
 143   int start = list.data[1].toInt();
 144   int size = list.data[2].toInt();
 145
 146   QTextCharFormat format;
 147   format.setFont( f );
 148
 149   QTextCursor cursor( document() );
 150   cursor.setPosition( start );
 151   cursor.setPosition( start + size, QTextCursor::KeepAnchor );
 152   cursor.setCharFormat( format );
 153 }
 154
 155 void QcTextEdit::setRangeText( const VariantList & list )
 156 {
 157   if( list.data.count() < 3 ) return;
 158   QString text = list.data[0].value<QString>();
 159   int start = list.data[1].toInt();
 160   int size = list.data[2].toInt();
 161
 162   QTextCursor cursor( document() );
 163   cursor.setPosition( start );
 164   cursor.setPosition( start + size, QTextCursor::KeepAnchor );
 165   cursor.insertText( text );
 166 }
 167
 168 void QcTextEdit::keyPressEvent( QKeyEvent *e )
 169 {
 170   if( _interpretSelection && e->modifiers() & (Qt::ControlModifier|Qt::ShiftModifier)
 171       && ( e->key() == Qt::Key_Return || e->key() == Qt::Key_Enter ) )
 172   {
 173     QString selection = selectedString();
 174     if( !selection.isEmpty() ) {
 175       Q_EMIT( interpret( selection ) );
 176       return;
 177     }
 178   }
 179
 180   QTextEdit::keyPressEvent( e );
 181 }