X-Git-Url: https://cloud.milkyroute.net/gitweb/dolphin.git/blobdiff_plain/7af39fb960352e0504153c627db0615d80758ebe..b65576a131eb59eaab4d33af830bdb2d2f9fde9f:/src/kitemviews/kitemlistcontainer.cpp diff --git a/src/kitemviews/kitemlistcontainer.cpp b/src/kitemviews/kitemlistcontainer.cpp index b480b4494..6279b15a9 100644 --- a/src/kitemviews/kitemlistcontainer.cpp +++ b/src/kitemviews/kitemlistcontainer.cpp @@ -1,8 +1,7 @@ /*************************************************************************** * Copyright (C) 2011 by Peter Penz * * * - * Based on the Itemviews NG project from Trolltech Labs: * - * http://qt.gitorious.org/qt-labs/itemviews-ng * + * Based on the Itemviews NG project from Trolltech Labs * * * * 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 * @@ -23,20 +22,16 @@ #include "kitemlistcontainer.h" #include "kitemlistcontroller.h" -#include "kitemlistsmoothscroller_p.h" #include "kitemlistview.h" -#include "kitemmodelbase.h" +#include "private/kitemlistsmoothscroller.h" #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 @@ -44,10 +39,12 @@ */ 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) : @@ -66,30 +63,40 @@ void KItemListContainerViewport::wheelEvent(QWheelEvent* event) event->ignore(); } - - KItemListContainer::KItemListContainer(KItemListController* controller, QWidget* parent) : QAbstractScrollArea(parent), m_controller(controller), - m_horizontalSmoothScroller(0), - m_verticalSmoothScroller(0) + m_horizontalSmoothScroller(nullptr), + m_verticalSmoothScroller(nullptr) { Q_ASSERT(controller); controller->setParent(this); - initialize(); -} -KItemListContainer::KItemListContainer(QWidget* parent) : - QAbstractScrollArea(parent), - m_controller(0), - m_horizontalSmoothScroller(0), - m_verticalSmoothScroller(0) -{ - initialize(); + QGraphicsView* graphicsView = new KItemListContainerViewport(new QGraphicsScene(this), this); + setViewport(graphicsView); + + m_horizontalSmoothScroller = new KItemListSmoothScroller(horizontalScrollBar(), this); + m_verticalSmoothScroller = new KItemListSmoothScroller(verticalScrollBar(), this); + + if (controller->model()) { + slotModelChanged(controller->model(), nullptr); + } + if (controller->view()) { + slotViewChanged(controller->view(), nullptr); + } + + connect(controller, &KItemListController::modelChanged, + this, &KItemListContainer::slotModelChanged); + connect(controller, &KItemListController::viewChanged, + this, &KItemListContainer::slotViewChanged); } 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 = nullptr; } KItemListController* KItemListContainer::controller() const @@ -97,6 +104,33 @@ KItemListController* KItemListContainer::controller() const return m_controller; } +void KItemListContainer::setEnabledFrame(bool enable) +{ + QGraphicsView* graphicsView = qobject_cast(viewport()); + if (enable) { + setFrameShape(QFrame::StyledPanel); + graphicsView->setPalette(palette()); + graphicsView->viewport()->setAutoFillBackground(true); + } else { + setFrameShape(QFrame::NoFrame); + // Make the background of the container transparent and apply the window-text color + // to the text color, so that enough contrast is given for all color + // schemes + QPalette p = graphicsView->palette(); + p.setColor(QPalette::Active, QPalette::Text, p.color(QPalette::Active, QPalette::WindowText)); + p.setColor(QPalette::Inactive, QPalette::Text, p.color(QPalette::Inactive, QPalette::WindowText)); + p.setColor(QPalette::Disabled, QPalette::Text, p.color(QPalette::Disabled, QPalette::WindowText)); + graphicsView->setPalette(p); + graphicsView->viewport()->setAutoFillBackground(false); + } +} + +bool KItemListContainer::enabledFrame() const +{ + const QGraphicsView* graphicsView = qobject_cast(viewport()); + return graphicsView->autoFillBackground(); +} + void KItemListContainer::keyPressEvent(QKeyEvent* event) { // TODO: We should find a better way to handle the key press events in the view. @@ -147,25 +181,19 @@ void KItemListContainer::wheelEvent(QWheelEvent* event) 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) @@ -173,23 +201,33 @@ void KItemListContainer::slotViewChanged(KItemListView* current, KItemListView* QGraphicsScene* scene = static_cast(viewport())->scene(); if (previous) { scene->removeItem(previous); - disconnect(previous, SIGNAL(scrollOrientationChanged(Qt::Orientation,Qt::Orientation)), this, SLOT(slotScrollOrientationChanged(Qt::Orientation,Qt::Orientation))); - disconnect(previous, SIGNAL(scrollOffsetChanged(qreal,qreal)), this, SLOT(updateScrollOffsetScrollBar())); - disconnect(previous, SIGNAL(maximumScrollOffsetChanged(qreal,qreal)), this, SLOT(updateScrollOffsetScrollBar())); - disconnect(previous, SIGNAL(itemOffsetChanged(qreal,qreal)), this, SLOT(updateItemOffsetScrollBar())); - disconnect(previous, SIGNAL(maximumItemOffsetChanged(qreal,qreal)), this, SLOT(updateItemOffsetScrollBar())); - disconnect(previous, SIGNAL(scrollTo(qreal)), this, SLOT(scrollTo(qreal))); - m_horizontalSmoothScroller->setTargetObject(0); - m_verticalSmoothScroller->setTargetObject(0); + disconnect(previous, &KItemListView::scrollOrientationChanged, + this, &KItemListContainer::slotScrollOrientationChanged); + disconnect(previous, &KItemListView::scrollOffsetChanged, + this, &KItemListContainer::updateScrollOffsetScrollBar); + disconnect(previous, &KItemListView::maximumScrollOffsetChanged, + this, &KItemListContainer::updateScrollOffsetScrollBar); + disconnect(previous, &KItemListView::itemOffsetChanged, + this, &KItemListContainer::updateItemOffsetScrollBar); + disconnect(previous, &KItemListView::maximumItemOffsetChanged, + this, &KItemListContainer::updateItemOffsetScrollBar); + disconnect(previous, &KItemListView::scrollTo, this, &KItemListContainer::scrollTo); + m_horizontalSmoothScroller->setTargetObject(nullptr); + m_verticalSmoothScroller->setTargetObject(nullptr); } if (current) { scene->addItem(current); - connect(current, SIGNAL(scrollOrientationChanged(Qt::Orientation,Qt::Orientation)), this, SLOT(slotScrollOrientationChanged(Qt::Orientation,Qt::Orientation))); - connect(current, SIGNAL(scrollOffsetChanged(qreal,qreal)), this, SLOT(updateScrollOffsetScrollBar())); - connect(current, SIGNAL(maximumScrollOffsetChanged(qreal,qreal)), this, SLOT(updateScrollOffsetScrollBar())); - connect(current, SIGNAL(itemOffsetChanged(qreal,qreal)), this, SLOT(updateItemOffsetScrollBar())); - connect(current, SIGNAL(maximumItemOffsetChanged(qreal,qreal)), this, SLOT(updateItemOffsetScrollBar())); - connect(current, SIGNAL(scrollTo(qreal)), this, SLOT(scrollTo(qreal))); + connect(current, &KItemListView::scrollOrientationChanged, + this, &KItemListContainer::slotScrollOrientationChanged); + connect(current, &KItemListView::scrollOffsetChanged, + this, &KItemListContainer::updateScrollOffsetScrollBar); + connect(current, &KItemListView::maximumScrollOffsetChanged, + this, &KItemListContainer::updateScrollOffsetScrollBar); + connect(current, &KItemListView::itemOffsetChanged, + this, &KItemListContainer::updateItemOffsetScrollBar); + connect(current, &KItemListView::maximumItemOffsetChanged, + this, &KItemListContainer::updateItemOffsetScrollBar); + connect(current, &KItemListView::scrollTo, this, &KItemListContainer::scrollTo); m_horizontalSmoothScroller->setTargetObject(current); m_verticalSmoothScroller->setTargetObject(current); updateSmoothScrollers(current->scrollOrientation()); @@ -215,24 +253,40 @@ 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(); - pageStep = view->size().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(); + + // However, the total height of the view must be considered for the + // maximum value of the scroll bar. Note that the view's scrollOffset() + // refers to the offset of the top part of the view, which might be + // hidden behind the header. + maximum = qMax(0, int(view->maximumScrollOffset() - view->size().height())); } else { smoothScroller = m_horizontalSmoothScroller; scrollOffsetScrollBar = horizontalScrollBar(); singleStep = view->itemSize().width(); pageStep = view->size().width(); + maximum = qMax(0, int(view->maximumScrollOffset() - view->size().width())); } const int value = view->scrollOffset(); - const int maximum = qMax(0, int(view->maximumScrollOffset() - pageStep)); if (smoothScroller->requestScrollBarUpdate(maximum)) { const bool updatePolicy = (scrollOffsetScrollBar->maximum() > 0 && maximum == 0) || horizontalScrollBarPolicy() == Qt::ScrollBarAlwaysOn; @@ -257,8 +311,8 @@ 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) { @@ -291,26 +345,28 @@ void KItemListContainer::updateGeometries() int extra = frameWidth() * 2; QStyleOption option; option.initFrom(this); + int scrollbarSpacing = 0; if (style()->styleHint(QStyle::SH_ScrollView_FrameOnlyAroundContents, &option, this)) { - extra += style()->pixelMetric(QStyle::PM_ScrollView_ScrollBarSpacing, &option, this); + scrollbarSpacing = style()->pixelMetric(QStyle::PM_ScrollView_ScrollBarSpacing, &option, this); } const int widthDec = verticalScrollBar()->isVisible() - ? extra + style()->pixelMetric(QStyle::PM_ScrollBarExtent, &option, this) + ? extra + scrollbarSpacing + style()->pixelMetric(QStyle::PM_ScrollBarExtent, &option, this) : extra; const int heightDec = horizontalScrollBar()->isVisible() - ? extra + style()->pixelMetric(QStyle::PM_ScrollBarExtent, &option, this) + ? extra + scrollbarSpacing + style()->pixelMetric(QStyle::PM_ScrollBarExtent, &option, this) : extra; - rect.adjust(0, 0, -widthDec, -heightDec); - - const QRectF newGeometry(0, 0, rect.width(), rect.height()); + const QRectF newGeometry(0, 0, rect.width() - widthDec, + rect.height() - heightDec); if (m_controller->view()->geometry() != newGeometry) { m_controller->view()->setGeometry(newGeometry); - static_cast(viewport())->scene()->setSceneRect(0, 0, rect.width(), rect.height()); - static_cast(viewport())->viewport()->setGeometry(QRect(0, 0, rect.width(), rect.height())); + // Get the real geometry of the view again since the scrollbars + // visibilities and the view geometry may have changed in re-layout. + static_cast(viewport())->scene()->setSceneRect(m_controller->view()->geometry()); + static_cast(viewport())->viewport()->setGeometry(m_controller->view()->geometry().toRect()); updateScrollOffsetScrollBar(); updateItemOffsetScrollBar(); @@ -354,29 +410,4 @@ void KItemListContainer::updateScrollOffsetScrollBarPolicy() } } -void KItemListContainer::initialize() -{ - if (m_controller) { - if (m_controller->model()) { - slotModelChanged(m_controller->model(), 0); - } - if (m_controller->view()) { - slotViewChanged(m_controller->view(), 0); - } - } else { - m_controller = new KItemListController(this); - } - - connect(m_controller, SIGNAL(modelChanged(KItemModelBase*,KItemModelBase*)), - this, SLOT(slotModelChanged(KItemModelBase*,KItemModelBase*))); - connect(m_controller, SIGNAL(viewChanged(KItemListView*,KItemListView*)), - this, SLOT(slotViewChanged(KItemListView*,KItemListView*))); - - QGraphicsView* graphicsView = new KItemListContainerViewport(new QGraphicsScene(this), this); - setViewport(graphicsView); - - m_horizontalSmoothScroller = new KItemListSmoothScroller(horizontalScrollBar(), this); - m_verticalSmoothScroller = new KItemListSmoothScroller(verticalScrollBar(), this); -} - #include "kitemlistcontainer.moc"