File indexing completed on 2024-04-28 05:45:14

 /*
     This file is part of the KDE project
     SPDX-FileCopyrightText: 2022 Felix Ernst <felixernst@kde.org>
 
     SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
 */
 
 #include "bottombar.h"
 
 #include "backgroundcolorhelper.h"
 #include "bottombarcontentscontainer.h"
 
 #include <QGridLayout>
 #include <QResizeEvent>
 #include <QScrollArea>
 #include <QStyle>
 #include <QTimer>
 
 using namespace SelectionMode;
 
 BottomBar::BottomBar(KActionCollection *actionCollection, QWidget *parent)
     : QWidget{parent}
 {
     // Showing of this widget is normally animated. We hide it for now and make it small.
     hide();
     setMaximumHeight(0);
 
     setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Fixed);
     setMinimumWidth(0);
 
     auto fillParentLayout = new QGridLayout(this);
     fillParentLayout->setContentsMargins(0, 0, 0, 0);
 
     // Put the contents into a QScrollArea. This prevents increasing the view width
     // in case that not enough width for the contents is available. (this trick is also used in dolphinsearchbox.cpp.)
     m_scrollArea = new QScrollArea(this);
     fillParentLayout->addWidget(m_scrollArea);
     m_scrollArea->setFrameShape(QFrame::NoFrame);
     m_scrollArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
     m_scrollArea->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
     m_scrollArea->setWidgetResizable(true);
 
     m_contentsContainer = new BottomBarContentsContainer(actionCollection, m_scrollArea);
     m_scrollArea->setWidget(m_contentsContainer);
     m_contentsContainer->installEventFilter(this); // Adjusts the height of this bar to the height of the contentsContainer
     connect(m_contentsContainer, &BottomBarContentsContainer::error, this, &BottomBar::error);
     connect(m_contentsContainer, &BottomBarContentsContainer::barVisibilityChangeRequested, this, [this](bool visible) {
         if (!m_allowedToBeVisible && visible) {
             return;
         }
         setVisibleInternal(visible, WithAnimation);
     });
     connect(m_contentsContainer, &BottomBarContentsContainer::selectionModeLeavingRequested, this, &BottomBar::selectionModeLeavingRequested);
 
     BackgroundColorHelper::instance()->controlBackgroundColor(this);
 }
 
 void BottomBar::setVisible(bool visible, Animated animated)
 {
     m_allowedToBeVisible = visible;
     setVisibleInternal(visible, animated);
 }
 
 void BottomBar::setVisibleInternal(bool visible, Animated animated)
 {
     Q_ASSERT_X(animated == WithAnimation, "SelectionModeBottomBar::setVisible", "This wasn't implemented.");
     if (!visible && contents() == PasteContents) {
         return; // The bar with PasteContents should not be hidden or users might not know how to paste what they just copied.
                 // Set contents to anything else to circumvent this prevention mechanism.
     }
     if (visible && !m_contentsContainer->hasSomethingToShow()) {
         return; // There is nothing on the bar that we want to show. We keep it invisible and only show it when the selection or the contents change.
     }
 
     setEnabled(visible);
     if (m_heightAnimation) {
         m_heightAnimation->stop(); // deletes because of QAbstractAnimation::DeleteWhenStopped.
     }
     m_heightAnimation = new QPropertyAnimation(this, "maximumHeight");
     m_heightAnimation->setDuration(2 * style()->styleHint(QStyle::SH_Widget_Animation_Duration, nullptr, this) * GlobalConfig::animationDurationFactor());
     m_heightAnimation->setStartValue(height());
     m_heightAnimation->setEasingCurve(QEasingCurve::OutCubic);
     if (visible) {
         show();
         m_heightAnimation->setEndValue(sizeHint().height());
         connect(m_heightAnimation, &QAbstractAnimation::finished, this, [this]() {
             setMaximumHeight(sizeHint().height());
         });
     } else {
         m_heightAnimation->setEndValue(0);
         connect(m_heightAnimation, &QAbstractAnimation::finished, this, &QWidget::hide);
     }
 
     m_heightAnimation->start(QAbstractAnimation::DeleteWhenStopped);
 }
 
 QSize BottomBar::sizeHint() const
 {
     return QSize{1, m_contentsContainer->sizeHint().height()};
     // 1 as width because this widget should never be the reason the DolphinViewContainer is made wider.
 }
 
 void BottomBar::slotSelectionChanged(const KFileItemList &selection, const QUrl &baseUrl)
 {
     m_contentsContainer->slotSelectionChanged(selection, baseUrl);
 }
 
 void BottomBar::slotSplitTabDisabled()
 {
     switch (contents()) {
     case CopyToOtherViewContents:
     case MoveToOtherViewContents:
         Q_EMIT selectionModeLeavingRequested();
     default:
         return;
     }
 }
 
 void BottomBar::resetContents(BottomBar::Contents contents)
 {
     m_contentsContainer->resetContents(contents);
 
     if (m_allowedToBeVisible) {
         setVisibleInternal(true, WithAnimation);
     }
 }
 
 BottomBar::Contents BottomBar::contents() const
 {
     return m_contentsContainer->contents();
 }
 
 bool BottomBar::eventFilter(QObject *watched, QEvent *event)
 {
     Q_ASSERT(qobject_cast<QWidget *>(watched)); // This evenfFilter is only implemented for QWidgets.
 
     switch (event->type()) {
     case QEvent::ChildAdded:
     case QEvent::ChildRemoved:
         QTimer::singleShot(0, this, [this]() {
             // The necessary height might have changed because of the added/removed child so we change the height manually.
             if (isVisibleTo(parentWidget()) && isEnabled() && (!m_heightAnimation || m_heightAnimation->state() != QAbstractAnimation::Running)) {
                 setMaximumHeight(sizeHint().height());
             }
         });
         // Fall through.
     default:
         return false;
     }
 }
 
 void BottomBar::resizeEvent(QResizeEvent *resizeEvent)
 {
     if (resizeEvent->oldSize().width() == resizeEvent->size().width()) {
         // The width() didn't change so our custom override isn't needed.
         return QWidget::resizeEvent(resizeEvent);
     }
 
     m_contentsContainer->adaptToNewBarWidth(width());
 
     return QWidget::resizeEvent(resizeEvent);
 }
 
 #include "moc_bottombar.cpp"