editors/sc-ide/widgets/util/multi_splitter.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_UTIL_MULTI_SPLITTER_HPP_INCLUDED
  22 #define SCIDE_WIDGETS_UTIL_MULTI_SPLITTER_HPP_INCLUDED
  23
  24 #include <QSplitter>
  25
  26 namespace ScIDE {
  27
  28 class MultiSplitter : public QSplitter
  29 {
  30 public:
  31     explicit MultiSplitter(QWidget *parent = 0):
  32         QSplitter(parent)
  33     {
  34         setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
  35     }
  36
  37     void insertWidget( QWidget *widget, QWidget *neighbour, Qt::Orientation direction )
  38     {
  39         if (!neighbour || !widgetIsChild(neighbour)) {
  40             qWarning("MultiSplitter: neighbour widget invalid");
  41             return;
  42         }
  43
  44         QSplitter *parentSplitter = parentSplitterOf(neighbour);
  45         Q_ASSERT(parentSplitter);
  46         int posInParent = parentSplitter->indexOf(neighbour);
  47         Q_ASSERT(posInParent != -1);
  48
  49         if (parentSplitter->orientation() == direction) {
  50             parentSplitter->insertWidget(posInParent + 1, widget);
  51         }
  52         else if (parentSplitter->count() < 2)
  53         {
  54             parentSplitter->setOrientation(direction);
  55             parentSplitter->addWidget(widget);
  56         }
  57         else {
  58             QSplitter * splitter = new QSplitter(direction);
  59             splitter->addWidget(neighbour);
  60             splitter->addWidget(widget);
  61             parentSplitter->insertWidget(posInParent, splitter);
  62         }
  63     }
  64
  65     void removeWidget( QWidget *widget )
  66     {
  67         if (!widget || !widgetIsChild(widget)) {
  68             qWarning("MultiSplitter: widget invalid");
  69             return;
  70         }
  71
  72         QSplitter *parent = parentSplitterOf(widget);
  73         if (parent == this && parent->count() < 2) {
  74             qWarning("MultiSplitter: can not remove last widget");
  75             return;
  76         }
  77
  78         delete widget;
  79
  80         Q_ASSERT(parent->count());
  81
  82         if (parent != this && parent->count() == 1) {
  83             QSplitter *grandParent = parentSplitterOf(parent);
  84             int posInParent = grandParent->indexOf(parent);
  85             Q_ASSERT(posInParent != -1);
  86             grandParent->insertWidget(posInParent, parent->widget(0));
  87             delete parent;
  88         }
  89     }
  90
  91 private:
  92     QSplitter *parentSplitterOf( QWidget *widget )
  93     {
  94         return qobject_cast<QSplitter*>( widget->parent() );
  95     }
  96
  97     bool widgetIsChild( QWidget *widget )
  98     {
  99         QObject *object = widget->parent();
 100         while (object) {
 101             if (object == this)
 102                 return true;
 103             object = object->parent();
 104         }
 105         return false;
 106     }
 107 };
 108
 109 } // namespace ScIDE
 110
 111 #endif // SCIDE_WIDGETS_UTIL_MULTI_SPLITTER_HPP_INCLUDED