/***************************************************************************
* Copyright (C) 2011 by Peter Penz <peter.penz19@gmail.com> *
* *
- * 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 *
#include "kitemlistcontroller.h"
#include "kitemlistview.h"
-#include "kitemmodelbase.h"
-
#include "private/kitemlistsmoothscroller.h"
#include <QApplication>
+#include <QFontMetrics>
#include <QGraphicsScene>
#include <QGraphicsView>
-#include <QPropertyAnimation>
#include <QScrollBar>
-#include <QStyle>
#include <QStyleOption>
-#include <KDebug>
-
-#include "kitemlistviewaccessible.h"
-
/**
* Replaces the default viewport of KItemListContainer by a
* non-scrollable viewport. The scrolling is done in an optimized
*/
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) :
event->ignore();
}
-QAccessibleInterface* accessibleContainerFactory(const QString &key, QObject *object)
-{
- Q_UNUSED(key)
- if (KItemListContainer*view = qobject_cast<KItemListContainer*>(object))
- return new KItemListContainerAccessible(view);
- if (KItemListView *view = qobject_cast<KItemListView*>(object))
- return new KItemListViewAccessible(view);
- return 0;
-}
-
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);
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, SIGNAL(modelChanged(KItemModelBase*,KItemModelBase*)),
- this, SLOT(slotModelChanged(KItemModelBase*,KItemModelBase*)));
- connect(controller, SIGNAL(viewChanged(KItemListView*,KItemListView*)),
- this, SLOT(slotViewChanged(KItemListView*,KItemListView*)));
-
- QAccessible::installFactory(accessibleContainerFactory);
+ 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 = 0;
-
- QAccessible::removeFactory(accessibleContainerFactory);
+ m_controller = nullptr;
}
KItemListController* KItemListContainer::controller() const
if (view) {
QApplication::sendEvent(view, event);
}
- //QAccessible::updateAccessibility(view, 0, QAccessible::Focus);
}
void KItemListContainer::showEvent(QShowEvent* 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)
QGraphicsScene* scene = static_cast<QGraphicsView*>(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());
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;
return;
}
- KItemListSmoothScroller* smoothScroller = 0;
- QScrollBar* itemOffsetScrollBar = 0;
+ KItemListSmoothScroller* smoothScroller = nullptr;
+ QScrollBar* itemOffsetScrollBar = nullptr;
int singleStep = 0;
int pageStep = 0;
if (view->scrollOrientation() == Qt::Vertical) {
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<KItemListContainerViewport*>(viewport())->scene()->setSceneRect(0, 0, rect.width(), rect.height());
- static_cast<KItemListContainerViewport*>(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<KItemListContainerViewport*>(viewport())->scene()->setSceneRect(m_controller->view()->geometry());
+ static_cast<KItemListContainerViewport*>(viewport())->viewport()->setGeometry(m_controller->view()->geometry().toRect());
updateScrollOffsetScrollBar();
updateItemOffsetScrollBar();
projects / dolphin.git / blobdiff