ground/gcs/src/libs/utils/treewidgetcolumnstretcher.cpp

   1 /**
   2  ******************************************************************************
   3  *
   4  * @file       treewidgetcolumnstretcher.cpp
   5  * @author     The OpenPilot Team, http://www.openpilot.org Copyright (C) 2010.
   6  *             Parts by Nokia Corporation (qt-info@nokia.com) Copyright (C) 2009.
   7  * @brief
   8  * @see        The GNU Public License (GPL) Version 3
   9  * @defgroup
  10  * @{
  11  *
  12  *****************************************************************************/
  13 /*
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 3 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful, but
  20  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  21  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  22  * for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License along
  25  * with this program; if not, write to the Free Software Foundation, Inc.,
  26  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  27  */
  28
  29 #include "treewidgetcolumnstretcher.h"
  30 #include <QTreeWidget>
  31 #include <QHideEvent>
  32 #include <QHeaderView>
  33 using namespace Utils;
  34
  35 TreeWidgetColumnStretcher::TreeWidgetColumnStretcher(QTreeWidget *treeWidget, int columnToStretch)
  36     : QObject(treeWidget->header()), m_columnToStretch(columnToStretch)
  37 {
  38     parent()->installEventFilter(this);
  39     QHideEvent fake;
  40     TreeWidgetColumnStretcher::eventFilter(parent(), &fake);
  41 }
  42
  43 bool TreeWidgetColumnStretcher::eventFilter(QObject *obj, QEvent *ev)
  44 {
  45     if (obj == parent()) {
  46         if (ev->type() == QEvent::Show) {
  47             QHeaderView *hv = qobject_cast<QHeaderView *>(obj);
  48             for (int i = 0; i < hv->count(); ++i) {
  49                 hv->setSectionResizeMode(i, QHeaderView::Interactive);
  50             }
  51         } else if (ev->type() == QEvent::Hide) {
  52             QHeaderView *hv = qobject_cast<QHeaderView *>(obj);
  53             for (int i = 0; i < hv->count(); ++i) {
  54                 hv->setSectionResizeMode(i, i == m_columnToStretch ? QHeaderView::Stretch : QHeaderView::ResizeToContents);
  55             }
  56         } else if (ev->type() == QEvent::Resize) {
  57             QHeaderView *hv = qobject_cast<QHeaderView *>(obj);
  58             if (hv->sectionResizeMode(m_columnToStretch) == QHeaderView::Interactive) {
  59                 QResizeEvent *re = static_cast<QResizeEvent *>(ev);
  60                 int diff = re->size().width() - re->oldSize().width();
  61                 hv->resizeSection(m_columnToStretch, qMax(32, hv->sectionSize(1) + diff));
  62             }
  63         }
  64     }
  65     return false;
  66 }