editors/sc-ide/widgets/editor_box.cpp

   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 #include "editor_box.hpp"
  22 #include "code_editor/editor.hpp"
  23 #include "../../core/main.hpp"
  24
  25 #include <QPainter>
  26
  27 namespace ScIDE {
  28
  29 QPointer<CodeEditorBox> CodeEditorBox::gActiveBox;
  30
  31 CodeEditorBox::CodeEditorBox(QWidget *parent) :
  32     QWidget(parent)
  33 {
  34     setFocusPolicy(Qt::StrongFocus);
  35     setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
  36
  37     mLayout = new QStackedLayout();
  38     setLayout(mLayout);
  39
  40     connect(Main::documentManager(), SIGNAL(closed(Document*)),
  41             this, SLOT(onDocumentClosed(Document*)));
  42 }
  43
  44 void CodeEditorBox::setDocument(Document *doc, int pos)
  45 {
  46     if (!doc)
  47         return;
  48
  49     CodeEditor *editor = currentEditor();
  50     bool switchEditor = !editor || editor->document() != doc;
  51
  52     if (switchEditor)
  53     {
  54         editor = editorForDocument(doc);
  55         if (!editor) {
  56             editor = new CodeEditor(doc);
  57             editor->installEventFilter(this);
  58             mHistory.prepend(editor);
  59             mLayout->addWidget(editor);
  60         }
  61         else {
  62             mHistory.removeOne(editor);
  63             mHistory.prepend(editor);
  64         }
  65         mLayout->setCurrentWidget(editor);
  66         setFocusProxy(editor);
  67     }
  68
  69     if (pos != -1)
  70         editor->showPosition(pos);
  71
  72     if (switchEditor)
  73         emit currentChanged(editor);
  74 }
  75
  76 void CodeEditorBox::onDocumentClosed(Document *doc)
  77 {
  78     CodeEditor * editor = editorForDocument(doc);
  79     if (editor) {
  80         bool wasCurrent = editor == currentEditor();
  81         mHistory.removeAll(editor);
  82         delete editor;
  83         if (wasCurrent) {
  84             editor = currentEditor();
  85             if (editor)
  86                 mLayout->setCurrentWidget(editor);
  87             setFocusProxy(editor);
  88             emit currentChanged(editor);
  89         }
  90     }
  91 }
  92
  93 CodeEditor *CodeEditorBox::currentEditor()
  94 {
  95     if (mHistory.count())
  96         return mHistory.first();
  97     else
  98         return 0;
  99 }
 100
 101 int CodeEditorBox::historyIndexOf(Document *doc)
 102 {
 103     int count = mHistory.count();
 104     for(int idx = 0; idx < count; ++idx)
 105         if (mHistory[idx]->document() == doc)
 106             return idx;
 107     return -1;
 108 }
 109
 110 CodeEditor *CodeEditorBox::editorForDocument(Document* doc)
 111 {
 112     foreach(CodeEditor *editor, mHistory)
 113         if (editor->document() == doc)
 114             return editor;
 115     return 0;
 116 }
 117
 118 bool CodeEditorBox::eventFilter( QObject *object, QEvent *event )
 119 {
 120     switch(event->type()) {
 121     case QEvent::FocusIn:
 122         setActive();
 123     default:;
 124     }
 125
 126     return QWidget::eventFilter(object, event);
 127 }
 128
 129 void CodeEditorBox::focusInEvent( QFocusEvent * )
 130 {
 131     setActive();
 132 }
 133
 134 Document * CodeEditorBox::currentDocument()
 135 {
 136     CodeEditor *editor = currentEditor();
 137     return editor ? editor->document() : 0;
 138 }
 139
 140 void CodeEditorBox::paintEvent( QPaintEvent * )
 141 {
 142     if (mLayout->currentWidget() == 0) {
 143         QPainter painter(this);
 144         painter.setRenderHint( QPainter::Antialiasing, true );
 145         int colorRatio = isActive() ? 160 : 125;
 146         painter.setBrush( palette().color(QPalette::Window).darker(colorRatio) );
 147         painter.setPen( Qt::NoPen );
 148         painter.drawRoundedRect( rect().adjusted(4, 4, -4, -4), 4, 4 );
 149     }
 150 }
 151
 152 } // namesapce ScIDE