src/Gui/TaskProgressIndicator.cpp

   1 /* Copyright (C) 2006 - 2014 Jan Kundrát <jkt@flaska.net>
   2    Copyright (C) 2014 Thomas Lübking <thomas.luebking@gmail.com>
   3
   4    This file is part of the Trojita Qt IMAP e-mail client,
   5    http://trojita.flaska.net/
   6
   7    This program is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU General Public License as
   9    published by the Free Software Foundation; either version 2 of
  10    the License or (at your option) version 3 or any later version
  11    accepted by the membership of KDE e.V. (or its successor approved
  12    by the membership of KDE e.V.), which shall act as a proxy
  13    defined in Section 14 of version 3 of the license.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "TaskProgressIndicator.h"
  25 #include <QApplication>
  26 #include <QMouseEvent>
  27 #include <QTimer>
  28 #include "Gui/Spinner.h"
  29 #include "Imap/Model/Model.h"
  30 #include "Imap/Model/VisibleTasksModel.h"
  31
  32 namespace Gui
  33 {
  34
  35 TaskProgressIndicator::TaskProgressIndicator(QWidget *parent) :
  36     Spinner(parent), m_busyCursorTrigger(new QTimer(this)), m_busy(false)
  37 {
  38     connect(m_busyCursorTrigger, &QTimer::timeout, []() {
  39         QApplication::setOverrideCursor(Qt::BusyCursor);
  40     });
  41     m_busyCursorTrigger->setSingleShot(true);
  42     m_busyCursorTrigger->setInterval(666);
  43
  44     setType(Spinner::Elastic);
  45     setContext(Spinner::Throbber);
  46 }
  47
  48 /** @short Connect to the specified IMAP model as the source of the activity information */
  49 void TaskProgressIndicator::setImapModel(Imap::Mailbox::Model *model)
  50 {
  51     if (model) {
  52         m_visibleTasksModel = new Imap::Mailbox::VisibleTasksModel(model, model->taskModel());
  53         connect(m_visibleTasksModel.data(), &QAbstractItemModel::layoutChanged, this, &TaskProgressIndicator::updateActivityIndication);
  54         connect(m_visibleTasksModel.data(), &QAbstractItemModel::modelReset, this, &TaskProgressIndicator::updateActivityIndication);
  55         connect(m_visibleTasksModel.data(), &QAbstractItemModel::rowsInserted, this, &TaskProgressIndicator::updateActivityIndication);
  56         connect(m_visibleTasksModel.data(), &QAbstractItemModel::rowsRemoved, this, &TaskProgressIndicator::updateActivityIndication);
  57     }
  58 }
  59
  60 /** @short Reflect a possible change in the activity in the GUI */
  61 void TaskProgressIndicator::updateActivityIndication()
  62 {
  63     if (!m_visibleTasksModel)
  64         return;
  65
  66     bool busy = m_visibleTasksModel->hasChildren();
  67     if (!m_busy && busy) {
  68         start();
  69         if (!m_busyCursorTrigger->isActive()) {
  70             // do NOT restart, we don't want to prolong this delay
  71             m_busyCursorTrigger->start();
  72         }
  73     } else if (m_busy && !busy) {
  74         stop();
  75         if (!m_busyCursorTrigger->isActive()) {
  76             // don't restore unless we've alredy set it
  77             QApplication::restoreOverrideCursor();
  78         }
  79         // don't cause future timeout
  80         m_busyCursorTrigger->stop();
  81     }
  82
  83     if (busy) {
  84         setToolTip(tr("%n ongoing actions", 0, m_visibleTasksModel->rowCount()));
  85     } else {
  86         setToolTip(tr("IMAP connection idle"));
  87     }
  88
  89     m_busy = busy;
  90 }
  91
  92 }