X-Git-Url: https://cloud.milkyroute.net/gitweb/dolphin.git/blobdiff_plain/fa36c3fd1f53a223f43bb57d7c28e431a889a7c2..8bc7f72a731904f4cc0669333e5db39613246e9e:/src/kitemviews/kitemlistcontainer.cpp diff --git a/src/kitemviews/kitemlistcontainer.cpp b/src/kitemviews/kitemlistcontainer.cpp index 39e62962e..10b9f1415 100644 --- a/src/kitemviews/kitemlistcontainer.cpp +++ b/src/kitemviews/kitemlistcontainer.cpp @@ -1,43 +1,25 @@ -/*************************************************************************** - * Copyright (C) 2011 by Peter Penz * - * * - * Based on the Itemviews NG project from Trolltech Labs: * - * http://qt.gitorious.org/qt-labs/itemviews-ng * - * * - * 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 * - ***************************************************************************/ +/* + * SPDX-FileCopyrightText: 2011 Peter Penz + * + * Based on the Itemviews NG project from Trolltech Labs + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ #include "kitemlistcontainer.h" #include "kitemlistcontroller.h" #include "kitemlistview.h" -#include "kitemmodelbase.h" - #include "private/kitemlistsmoothscroller.h" #include +#include #include #include -#include #include -#include +#include #include -#include - /** * Replaces the default viewport of KItemListContainer by a * non-scrollable viewport. The scrolling is done in an optimized @@ -45,10 +27,12 @@ */ class KItemListContainerViewport : public QGraphicsView { + Q_OBJECT + public: KItemListContainerViewport(QGraphicsScene* scene, QWidget* parent); protected: - virtual void wheelEvent(QWheelEvent* event); + void wheelEvent(QWheelEvent* event) override; }; KItemListContainerViewport::KItemListContainerViewport(QGraphicsScene* scene, QWidget* parent) : @@ -70,8 +54,9 @@ void KItemListContainerViewport::wheelEvent(QWheelEvent* event) KItemListContainer::KItemListContainer(KItemListController* controller, QWidget* parent) : QAbstractScrollArea(parent), m_controller(controller), - m_horizontalSmoothScroller(0), - m_verticalSmoothScroller(0) + m_horizontalSmoothScroller(nullptr), + m_verticalSmoothScroller(nullptr), + m_scroller(nullptr) { Q_ASSERT(controller); controller->setParent(this); @@ -83,16 +68,23 @@ KItemListContainer::KItemListContainer(KItemListController* controller, QWidget* m_verticalSmoothScroller = new KItemListSmoothScroller(verticalScrollBar(), this); if (controller->model()) { - slotModelChanged(controller->model(), 0); + slotModelChanged(controller->model(), nullptr); } if (controller->view()) { - slotViewChanged(controller->view(), 0); + slotViewChanged(controller->view(), nullptr); } connect(controller, &KItemListController::modelChanged, this, &KItemListContainer::slotModelChanged); connect(controller, &KItemListController::viewChanged, this, &KItemListContainer::slotViewChanged); + + m_scroller = QScroller::scroller(viewport()); + m_scroller->grabGesture(viewport()); + connect(controller, &KItemListController::scrollerStop, + this, &KItemListContainer::stopScroller); + connect(m_scroller, &QScroller::stateChanged, + controller, &KItemListController::slotStateChanged); } KItemListContainer::~KItemListContainer() @@ -100,7 +92,7 @@ KItemListContainer::~KItemListContainer() // Don't rely on the QObject-order to delete the controller, otherwise // the QGraphicsScene might get deleted before the view. delete m_controller; - m_controller = 0; + m_controller = nullptr; } KItemListController* KItemListContainer::controller() const @@ -180,30 +172,24 @@ void KItemListContainer::wheelEvent(QWheelEvent* event) return; } - const bool scrollHorizontally = (event->orientation() == Qt::Horizontal) || - (event->orientation() == Qt::Vertical && !verticalScrollBar()->isVisible()); + const bool scrollHorizontally = (qAbs(event->angleDelta().y()) < qAbs(event->angleDelta().x())) || + (!verticalScrollBar()->isVisible()); KItemListSmoothScroller* smoothScroller = scrollHorizontally ? m_horizontalSmoothScroller : m_verticalSmoothScroller; - const int numDegrees = event->delta() / 8; - const int numSteps = numDegrees / 15; - - const QScrollBar* scrollBar = smoothScroller->scrollBar(); - smoothScroller->scrollTo(scrollBar->value() - numSteps * scrollBar->pageStep() / 4); - - event->accept(); + smoothScroller->handleWheelEvent(event); } void KItemListContainer::slotScrollOrientationChanged(Qt::Orientation current, Qt::Orientation previous) { - Q_UNUSED(previous); + Q_UNUSED(previous) updateSmoothScrollers(current); } void KItemListContainer::slotModelChanged(KItemModelBase* current, KItemModelBase* previous) { - Q_UNUSED(current); - Q_UNUSED(previous); + Q_UNUSED(current) + Q_UNUSED(previous) } void KItemListContainer::slotViewChanged(KItemListView* current, KItemListView* previous) @@ -222,8 +208,10 @@ void KItemListContainer::slotViewChanged(KItemListView* current, KItemListView* disconnect(previous, &KItemListView::maximumItemOffsetChanged, this, &KItemListContainer::updateItemOffsetScrollBar); disconnect(previous, &KItemListView::scrollTo, this, &KItemListContainer::scrollTo); - m_horizontalSmoothScroller->setTargetObject(0); - m_verticalSmoothScroller->setTargetObject(0); + disconnect(m_horizontalSmoothScroller, &KItemListSmoothScroller::scrollingStopped, previous, &KItemListView::scrollingStopped); + disconnect(m_verticalSmoothScroller, &KItemListSmoothScroller::scrollingStopped, previous, &KItemListView::scrollingStopped); + m_horizontalSmoothScroller->setTargetObject(nullptr); + m_verticalSmoothScroller->setTargetObject(nullptr); } if (current) { scene->addItem(current); @@ -238,6 +226,9 @@ void KItemListContainer::slotViewChanged(KItemListView* current, KItemListView* connect(current, &KItemListView::maximumItemOffsetChanged, this, &KItemListContainer::updateItemOffsetScrollBar); connect(current, &KItemListView::scrollTo, this, &KItemListContainer::scrollTo); + connect(m_horizontalSmoothScroller, &KItemListSmoothScroller::scrollingStopped, current, &KItemListView::scrollingStopped); + connect(m_verticalSmoothScroller, &KItemListSmoothScroller::scrollingStopped, current, &KItemListView::scrollingStopped); + m_horizontalSmoothScroller->setTargetObject(current); m_verticalSmoothScroller->setTargetObject(current); updateSmoothScrollers(current->scrollOrientation()); @@ -263,15 +254,22 @@ void KItemListContainer::updateScrollOffsetScrollBar() return; } - KItemListSmoothScroller* smoothScroller = 0; - QScrollBar* scrollOffsetScrollBar = 0; + KItemListSmoothScroller* smoothScroller = nullptr; + QScrollBar* scrollOffsetScrollBar = nullptr; int singleStep = 0; int pageStep = 0; int maximum = 0; if (view->scrollOrientation() == Qt::Vertical) { smoothScroller = m_verticalSmoothScroller; scrollOffsetScrollBar = verticalScrollBar(); - singleStep = view->itemSize().height(); + + // Don't scroll super fast when using a wheel mouse: + // We want to consider one "line" to be the text label which has a + // roughly fixed height rather than using the height of the icon which + // may be very tall + const QFontMetrics metrics(font()); + singleStep = metrics.height() * QApplication::wheelScrollLines(); + // We cannot use view->size().height() because this height might // include the header widget, which is not part of the scrolled area. pageStep = view->verticalPageStep(); @@ -314,8 +312,8 @@ void KItemListContainer::updateItemOffsetScrollBar() return; } - KItemListSmoothScroller* smoothScroller = 0; - QScrollBar* itemOffsetScrollBar = 0; + KItemListSmoothScroller* smoothScroller = nullptr; + QScrollBar* itemOffsetScrollBar = nullptr; int singleStep = 0; int pageStep = 0; if (view->scrollOrientation() == Qt::Vertical) { @@ -341,6 +339,11 @@ void KItemListContainer::updateItemOffsetScrollBar() } } +void KItemListContainer::stopScroller() +{ + m_scroller->stop(); +} + void KItemListContainer::updateGeometries() { QRect rect = geometry();