File indexing completed on 2024-04-28 05:45:15

 /*
     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 "topbar.h"
 
 #include "backgroundcolorhelper.h"
 
 #include <KColorScheme>
 #include <KLocalizedString>
 #include <KToolTipHelper>
 
 #include <QHBoxLayout>
 #include <QLabel>
 #include <QPushButton>
 #include <QScrollArea>
 #include <QStyle>
 
 using namespace SelectionMode;
 
 TopBar::TopBar(QWidget *parent)
     : QWidget{parent}
 {
     // Showing of this widget is normally animated. We hide it for now and make it small.
     hide();
     setMaximumHeight(0);
 
     setToolTip(KToolTipHelper::whatsThisHintOnly());
     setWhatsThis(xi18nc("@info:whatsthis",
                         "<title>Selection Mode</title><para>Select files or folders to manage or manipulate them."
                         "<list><item>Press on a file or folder to select it.</item><item>Press on an already selected file or folder to deselect it.</item>"
                         "<item>Pressing an empty area does <emphasis>not</emphasis> clear the selection.</item>"
                         "<item>Selection rectangles (created by dragging from an empty area) invert the selection status of items within.</item></list></para>"
                         "<para>The available action buttons at the bottom change depending on the current selection.</para>"));
 
     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 bottombar.cpp.)
     auto scrollArea = new QScrollArea(this);
     fillParentLayout->addWidget(scrollArea);
     scrollArea->setFrameShape(QFrame::NoFrame);
     scrollArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
     scrollArea->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
     scrollArea->setWidgetResizable(true);
 
     auto contentsContainer = new QWidget(scrollArea);
     scrollArea->setWidget(contentsContainer);
 
     BackgroundColorHelper::instance()->controlBackgroundColor(this);
 
     setMinimumWidth(0);
 
     m_fullLabelString = i18nc("@info label above the view explaining the state", "Selection Mode: Click on files or folders to select or deselect them.");
     m_shortLabelString = i18nc("@info label above the view explaining the state", "Selection Mode");
     m_label = new QLabel(contentsContainer);
     m_label->setMinimumWidth(0);
     BackgroundColorHelper::instance()->controlBackgroundColor(m_label);
 
     m_closeButton = new QPushButton(QIcon::fromTheme(QStringLiteral("window-close-symbolic")), "", contentsContainer);
     m_closeButton->setText(i18nc("@action:button", "Exit Selection Mode"));
     m_closeButton->setFlat(true);
     connect(m_closeButton, &QAbstractButton::clicked, this, &TopBar::selectionModeLeavingRequested);
 
     QHBoxLayout *layout = new QHBoxLayout(contentsContainer);
     auto contentsMargins = layout->contentsMargins();
     m_preferredHeight = contentsMargins.top() + m_label->sizeHint().height() + contentsMargins.bottom();
     scrollArea->setMaximumHeight(m_preferredHeight);
     m_closeButton->setFixedHeight(m_preferredHeight);
     layout->setContentsMargins(0, 0, 0, 0);
 
     layout->addStretch();
     layout->addWidget(m_label);
     layout->addStretch();
     layout->addWidget(m_closeButton);
 }
 
 void TopBar::setVisible(bool visible, Animated animated)
 {
     Q_ASSERT_X(animated == WithAnimation, "SelectionModeTopBar::setVisible", "This wasn't implemented.");
 
     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(m_preferredHeight);
     } else {
         m_heightAnimation->setEndValue(0);
         connect(m_heightAnimation, &QAbstractAnimation::finished, this, &QWidget::hide);
     }
 
     m_heightAnimation->start(QAbstractAnimation::DeleteWhenStopped);
 }
 
 void TopBar::resizeEvent(QResizeEvent *resizeEvent)
 {
     updateLabelString();
     return QWidget::resizeEvent(resizeEvent);
 }
 
 void TopBar::updateLabelString()
 {
     QFontMetrics fontMetrics = m_label->fontMetrics();
     if (fontMetrics.horizontalAdvance(m_fullLabelString) + m_closeButton->sizeHint().width() + style()->pixelMetric(QStyle::PM_LayoutLeftMargin) * 2
             + style()->pixelMetric(QStyle::PM_LayoutRightMargin) * 2
         < width()) {
         m_label->setText(m_fullLabelString);
     } else {
         m_label->setText(m_shortLabelString);
     }
 }
 
 #include "moc_topbar.cpp"