Folders Panel fixes

The following functionality from Dolphin 1.x has
been ported to the new view-engine:
- Allow expanding/collapsing of items
- Automatically select the current item
- Context menu for items

Related improvements to the view-engine:
- Make the expanding/collapsing interface already accessible
  in the base classes KItemModelBase and KItemListView. If
  no expanding/collapsing is supported at all by derived models
  (which is usually the default case) simply not reimplementing
  those 3 methods is sufficient and it does not introduce an
  additional complexity like in QAbstractItemModel/QModelIndex.

- Automatically handle the expanding/collapsing in KItemListController.
  This also includes the key-handling, which is quite special for
  expandable items.

- Don't let KItemListView automatically scroll to the current item
  if the current item got changed. The automatic scrolling should
  only be done if the current item has been changed by the user.
  Hence this functionality has been moved to the KItemListController
  which currently only triggers the automatic scrolling if the current
  item has been changed by the keyboard (we might extend the usecases
  later if required).

1 files changed, 0 insertions, 223 deletions

diff --git a/src/views/dolphinviewautoscroller.cpp b/src/views/dolphinviewautoscroller.cpp
deleted file mode 100644
index 5b338cc37..000000000
--- a/src/views/dolphinviewautoscroller.cpp
+++ /dev/null
@@ -1,223 +0,0 @@
-/***************************************************************************
- *   Copyright (C) 2008 by Peter Penz <[email protected]>             *
- *                                                                         *
- *   This program 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 2 of the License, or     *
- *   (at your option) any later version.                                   *
- *                                                                         *
- *   This program 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 this program; if not, write to the                         *
- *   Free Software Foundation, Inc.,                                       *
- *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
- ***************************************************************************/
-
-#include "dolphinviewautoscroller.h"
-
-#include <QAbstractItemView>
-#include <QApplication>
-#include <QCursor>
-#include <QEvent>
-#include <QMouseEvent>
-#include <QScrollBar>
-#include <QTimer>
-#include <math.h>
-
-DolphinViewAutoScroller::DolphinViewAutoScroller(QAbstractItemView* parent) :
-    QObject(parent),
-    m_rubberBandSelection(false),
-    m_keyPressed(false),
-    m_initializedTimestamp(false),
-    m_horizontalScrollInc(0),
-    m_verticalScrollInc(0),
-    m_itemView(parent),
-    m_timer(0),
-    m_timestamp()
-{
-    m_itemView->setAutoScroll(false);
-    m_itemView->viewport()->installEventFilter(this);
-    m_itemView->installEventFilter(this);
-
-    m_timer = new QTimer(this);
-    m_timer->setSingleShot(false);
-    m_timer->setInterval(1000 / 25); // 25 frames per second
-    connect(m_timer, SIGNAL(timeout()), this, SLOT(scrollViewport()));
-}
-
-DolphinViewAutoScroller::~DolphinViewAutoScroller()
-{
-}
-
-bool DolphinViewAutoScroller::isActive() const
-{
-    return m_timer->isActive();
-}
-
-void DolphinViewAutoScroller::handleCurrentIndexChange(const QModelIndex& current,
-                                                       const QModelIndex& previous)
-{
-    // When the autoscroller is inactive and a key has been pressed, it must be
-    // assured that the current item stays visible. The check whether the previous
-    // item is valid is important because of #197951. The keypress check is done
-    // because of #199833.
-    if (current.isValid() && (previous.isValid() || m_keyPressed) && !isActive()) {
-        m_itemView->scrollTo(current);
-    }
-}
-
-bool DolphinViewAutoScroller::eventFilter(QObject* watched, QEvent* event)
-{
-    if (watched == m_itemView->viewport()) {
-        switch (event->type()) {
-        case QEvent::MouseButtonPress:
-            if (static_cast<QMouseEvent*>(event)->button() == Qt::LeftButton) {
-                m_rubberBandSelection = true;
-            }
-            break;
-
-        case QEvent::MouseMove:
-            if (m_rubberBandSelection) {
-                triggerAutoScroll();
-            }
-            break;
-
-        case QEvent::MouseButtonRelease:
-            m_rubberBandSelection = false;
-            stopAutoScroll();
-            break;
-
-        case QEvent::DragEnter:
-        case QEvent::DragMove:
-            m_rubberBandSelection = false;
-            triggerAutoScroll();
-            break;
-
-        case QEvent::Drop:
-        case QEvent::DragLeave:
-            m_rubberBandSelection = false;
-            stopAutoScroll();
-            break;
-
-        default:
-            break;
-        }
-    } else if (watched == m_itemView) {
-        switch (event->type()) {
-        case QEvent::KeyPress:
-            m_keyPressed = true;
-            break;
-
-        case QEvent::KeyRelease:
-            m_keyPressed = false;
-            break;
-
-        default:
-            break;
-        }
-    }
-
-    return QObject::eventFilter(watched, event);
-}
-
-void DolphinViewAutoScroller::scrollViewport()
-{
-    if (m_timestamp.elapsed() < QApplication::startDragTime()) {
-        return;
-    }
-
-    QScrollBar* verticalScrollBar = m_itemView->verticalScrollBar();
-    if (verticalScrollBar) {
-        const int value = verticalScrollBar->value();
-        verticalScrollBar->setValue(value + m_verticalScrollInc);
-
-    }
-    QScrollBar* horizontalScrollBar = m_itemView->horizontalScrollBar();
-    if (horizontalScrollBar) {
-        const int value = horizontalScrollBar->value();
-        horizontalScrollBar->setValue(value + m_horizontalScrollInc);
-
-    }
-
-    if (m_rubberBandSelection) {
-        // The scrolling does not lead to an update of the rubberband
-        // selection. Fake a mouse move event to let the QAbstractItemView
-        // update the rubberband.
-        QWidget* viewport = m_itemView->viewport();
-        const QPoint pos = viewport->mapFromGlobal(QCursor::pos());
-        QMouseEvent event(QEvent::MouseMove, pos, Qt::LeftButton, Qt::LeftButton, QApplication::keyboardModifiers());
-        QCoreApplication::sendEvent(viewport, &event);
-    }
-}
-
-void DolphinViewAutoScroller::triggerAutoScroll()
-{
-    const bool verticalScrolling = m_itemView->verticalScrollBar() &&
-                                   m_itemView->verticalScrollBar()->isVisible();
-    const bool horizontalScrolling = m_itemView->horizontalScrollBar() &&
-                                     m_itemView->horizontalScrollBar()->isVisible();
-    if (!verticalScrolling && !horizontalScrolling) {
-        // no scrollbars are shown at all, so no autoscrolling is necessary
-        stopAutoScroll();
-        return;
-    }
-
-    QWidget* viewport = m_itemView->viewport();
-    const QPoint pos = viewport->mapFromGlobal(QCursor::pos());
-    if (verticalScrolling) {
-        m_verticalScrollInc = calculateScrollIncrement(pos.y(), viewport->height());
-    }
-    if (horizontalScrolling) {
-        m_horizontalScrollInc = calculateScrollIncrement(pos.x(), viewport->width());
-    }
-
-    if (m_timer->isActive()) {
-        if ((m_horizontalScrollInc == 0) && (m_verticalScrollInc == 0)) {
-            stopAutoScroll();
-        }
-    } else if ((m_horizontalScrollInc != 0) || (m_verticalScrollInc != 0)) {
-        if (!m_initializedTimestamp) {
-            m_initializedTimestamp = true;
-            m_timestamp.start();
-        }
-        m_timer->start();
-    }
-}
-
-void DolphinViewAutoScroller::stopAutoScroll()
-{
-    m_timer->stop();
-    m_horizontalScrollInc = 0;
-    m_verticalScrollInc = 0;
-    m_initializedTimestamp = false;
-}
-
-int DolphinViewAutoScroller::calculateScrollIncrement(int cursorPos, int rangeSize) const
-{
-    int inc = 0;
-
-    const int minSpeed = 4;
-    const int maxSpeed = 768;
-    const int speedLimiter = 48;
-    const int autoScrollBorder = 64;
-
-    if (cursorPos < autoScrollBorder) {
-        inc = -minSpeed + qAbs(cursorPos - autoScrollBorder) * (cursorPos - autoScrollBorder) / speedLimiter;
-        if (inc < -maxSpeed) {
-            inc = -maxSpeed;
-        }
-    } else if (cursorPos > rangeSize - autoScrollBorder) {
-        inc = minSpeed + qAbs(cursorPos - rangeSize + autoScrollBorder) * (cursorPos - rangeSize + autoScrollBorder) / speedLimiter;
-        if (inc > maxSpeed) {
-            inc = maxSpeed;
-        }
-    }
-
-    return inc;
-}
-
-#include "dolphinviewautoscroller.moc"