editors/sc-ide/widgets/goto_line_tool.hpp

   1 /*
   2     SuperCollider Qt IDE
   3     Copyright (c) 2012 Jakob Leben & Tim Blechmann
   4     http://www.audiosynth.com
   5
   6     This program is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     This program is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with this program; if not, write to the Free Software
  18     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
  19 */
  20
  21 #ifndef SCIDE_WIDGETS_GOTO_LINE_TOOL_HPP_INCLUDED
  22 #define SCIDE_WIDGETS_GOTO_LINE_TOOL_HPP_INCLUDED
  23
  24 #include "code_editor/editor.hpp"
  25 #include "../core/doc_manager.hpp"
  26
  27 #include <QWidget>
  28 #include <QSpinBox>
  29 #include <QToolButton>
  30 #include <QHBoxLayout>
  31 #include <QKeyEvent>
  32 #include <QPointer>
  33 #include <QLabel>
  34
  35 namespace ScIDE {
  36
  37 class GoToLineTool : public QWidget
  38 {
  39     Q_OBJECT
  40
  41 public:
  42     GoToLineTool( QWidget * parent = 0 ):
  43         QWidget(parent),
  44         mEditor(0)
  45     {
  46         mSpinBox = new QSpinBox;
  47         mSpinBox->setMinimum(0);
  48         mSpinBox->setMaximum(0);
  49
  50         QToolButton *goBtn = new QToolButton;
  51         goBtn->setText(tr("Go"));
  52         goBtn->setAutoRaise(true);
  53
  54         QLabel *label = new QLabel("Line:");
  55
  56         QHBoxLayout *layout = new QHBoxLayout;
  57         layout->setContentsMargins(0,0,0,0);
  58         layout->addWidget(label);
  59         layout->addWidget(mSpinBox);
  60         layout->addWidget(goBtn);
  61         layout->addStretch();
  62
  63         setLayout(layout);
  64
  65         setFocusProxy(mSpinBox);
  66
  67         connect(goBtn, SIGNAL(clicked()), this, SLOT(go()));
  68         connect(mSpinBox, SIGNAL(editingFinished()), this, SLOT(onEditingFinished()));
  69     }
  70
  71     void setEditor( CodeEditor *editor )
  72     {
  73         if (mEditor)
  74             mEditor->disconnect( this, SLOT(setMaximum(int)) );
  75
  76         mEditor = editor;
  77
  78         if (mEditor) {
  79             connect(mEditor, SIGNAL(blockCountChanged(int)), this, SLOT(setMaximum(int)));
  80             setMaximum(mEditor->blockCount());
  81         }
  82         else
  83             setMaximum(0);
  84     }
  85
  86     void setValue( int value ) { mSpinBox->setValue(value); }
  87
  88 public slots:
  89
  90     void setMaximum( int max ) {
  91         if (max > 0)
  92             mSpinBox->setRange(1, max);
  93         else
  94             mSpinBox->setRange(0,0);
  95     }
  96
  97     void setFocus()
  98     {
  99         mSpinBox->setFocus(Qt::OtherFocusReason);
 100         mSpinBox->selectAll();
 101     }
 102
 103 signals:
 104
 105     void activated( int lineNumber );
 106
 107 private slots:
 108
 109     void go()
 110     {
 111         int lineNumber = mSpinBox->value();
 112
 113         if (mEditor) {
 114             QTextDocument *doc = mEditor->textDocument();
 115             QTextBlock block( doc->findBlockByNumber(lineNumber - 1) );
 116             if (!block.isValid())
 117                 return;
 118
 119             QTextCursor cursor( doc );
 120             cursor.setPosition( block.position() );
 121             mEditor->setTextCursor(cursor);
 122         }
 123
 124         emit activated( lineNumber );
 125     }
 126
 127     void onEditingFinished()
 128     {
 129         if (mSpinBox->hasFocus())
 130             go();
 131     }
 132
 133 private:
 134
 135     QSpinBox *mSpinBox;
 136     QPointer<CodeEditor> mEditor;
 137 };
 138
 139 } // namespace ScIDE
 140
 141 #endif