src/viewpropsprogressinfo.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Peter Penz                                      *
   3  *   peter.penz@gmx.at                                                     *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20
  21 #include "viewpropsprogressinfo.h"
  22 #include "applyviewpropsjob.h"
  23 #include "viewproperties.h"
  24
  25 #include <QLabel>
  26 #include <QProgressBar>
  27 #include <QTimer>
  28 #include <QVBoxLayout>
  29
  30 #include <assert.h>
  31 #include <klocale.h>
  32 #include <kurl.h>
  33 #include <kio/jobclasses.h>
  34
  35 ViewPropsProgressInfo::ViewPropsProgressInfo(QWidget* parent,
  36                                              const KUrl& dir,
  37                                              const ViewProperties* viewProps) :
  38     KDialog(parent),
  39     m_dir(dir),
  40     m_viewProps(viewProps),
  41     m_label(0),
  42     m_progressBar(0),
  43     m_dirSizeJob(0),
  44     m_applyViewPropsJob(0),
  45     m_timer(0)
  46 {
  47     setCaption(i18n("Applying view properties"));
  48     setButtons(KDialog::Cancel);
  49
  50     QWidget* main = new QWidget();
  51     QVBoxLayout* topLayout = new QVBoxLayout();
  52
  53     m_label = new QLabel(i18n("Counting folders: %1", 0), main);
  54     m_progressBar = new QProgressBar(main);
  55
  56     topLayout->addWidget(m_label);
  57     topLayout->addWidget(m_progressBar);
  58
  59     main->setLayout(topLayout);
  60     setMainWidget(main);
  61
  62     // Use the directory size job to count the number of directories first. This
  63     // allows to give a progress indication for the user when applying the view
  64     // properties later.
  65     m_dirSizeJob = KIO::directorySize(dir);
  66     connect(m_dirSizeJob, SIGNAL(result(KJob*)),
  67             this, SLOT(applyViewProperties()));
  68
  69     // The directory size job cannot emit any progress signal, as it is not aware
  70     // about the total number of directories. Therefor a timer is triggered, which
  71     // periodically updates the current directory count.
  72     m_timer = new QTimer(this);
  73     connect(m_timer, SIGNAL(timeout()),
  74             this, SLOT(updateProgress()));
  75     m_timer->start(300);
  76
  77     connect(this, SIGNAL(cancelClicked()), this, SLOT(cancelApplying()));
  78 }
  79
  80 ViewPropsProgressInfo::~ViewPropsProgressInfo()
  81 {
  82     m_timer->stop();
  83 }
  84
  85 void ViewPropsProgressInfo::updateProgress()
  86 {
  87     if (m_dirSizeJob != 0) {
  88         const int subdirs = m_dirSizeJob->totalSubdirs();
  89         m_label->setText(i18n("Counting folders: %1", subdirs));
  90     }
  91     else {
  92         assert(m_applyViewPropsJob != 0);
  93         const int progress = m_applyViewPropsJob->progress();
  94         m_progressBar->setValue(progress);
  95     }
  96 }
  97
  98 void ViewPropsProgressInfo::applyViewProperties()
  99 {
 100     if (m_dirSizeJob->error()) {
 101         return;
 102     }
 103
 104     const int subdirs = m_dirSizeJob->totalSubdirs();
 105     m_label->setText(i18n("Folders: %1", subdirs));
 106     m_progressBar->setMaximum(subdirs);
 107
 108     m_dirSizeJob = 0;
 109
 110     m_applyViewPropsJob = new ApplyViewPropsJob(m_dir, *m_viewProps);
 111     connect(m_applyViewPropsJob, SIGNAL(result(KJob*)),
 112             this, SLOT(close()));
 113 }
 114
 115 void ViewPropsProgressInfo::cancelApplying()
 116 {
 117     if (m_dirSizeJob != 0) {
 118         m_dirSizeJob->doKill();
 119     }
 120     else {
 121         assert(m_applyViewPropsJob != 0);
 122         m_applyViewPropsJob->doKill();
 123     }
 124 }
 125
 126 #include "viewpropsprogressinfo.moc"