Clementine-audio-player-Mac-Linux-Windows/src/widgets/forcescrollperpixel.cpp

/* This file is part of Clementine.
   Copyright 2010, David Sansome <me@davidsansome.com>

   Clementine is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   Clementine is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with Clementine.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "forcescrollperpixel.h"

#include <QAbstractItemView>
#include <QEvent>
#include <QScrollBar>

ForceScrollPerPixel::ForceScrollPerPixel(QAbstractItemView* item_view,
                                         QObject* parent)
    : QObject(parent), item_view_(item_view) {
  item_view_->installEventFilter(this);
}

bool ForceScrollPerPixel::eventFilter(QObject* object, QEvent* event) {
  if (object == item_view_ && event->type() != QEvent::Destroy &&
      event->type() != QEvent::WinIdChange &&
      event->type() != QEvent::AccessibilityPrepare) {
    item_view_->setVerticalScrollMode(QAbstractItemView::ScrollPerPixel);
    item_view_->verticalScrollBar()->setSingleStep(20);
  }

  return QObject::eventFilter(object, event);
}