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/*
This file is part of the KDE project
SPDX-FileCopyrightText: 2022 Felix Ernst <[email protected]>
SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
*/
#include "selectionmodetopbar.h"
#include "backgroundcolorhelper.h"
#include <KColorScheme>
#include <KLocalizedString>
#include <KToolTipHelper>
#include <QHBoxLayout>
#include <QLabel>
#include <QPalette>
#include <QPropertyAnimation>
#include <QPushButton>
#include <QScrollArea>
#include <QStyle>
#include <QtGlobal>
#include <type_traits>
#include <iostream>
SelectionModeTopBar::SelectionModeTopBar(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 selectionmodebottombar.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->setToolTip(i18nc("@action:button", "Exit Selection Mode"));
m_closeButton->setAccessibleName(m_closeButton->toolTip());
m_closeButton->setFlat(true);
connect(m_closeButton, &QAbstractButton::pressed,
this, &SelectionModeTopBar::leaveSelectionModeRequested);
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 SelectionModeTopBar::setVisible(bool visible, Animated animated)
{
Q_ASSERT_X(animated == WithAnimation, "SelectionModeTopBar::setVisible", "This wasn't implemented.");
if (!m_heightAnimation) {
m_heightAnimation = new QPropertyAnimation(this, "maximumHeight");
}
disconnect(m_heightAnimation, &QAbstractAnimation::finished,
this, &QWidget::hide);
m_heightAnimation->setDuration(2 *
style()->styleHint(QStyle::SH_Widget_Animation_Duration, nullptr, this) *
GlobalConfig::animationDurationFactor());
if (visible) {
show();
m_heightAnimation->setStartValue(0);
m_heightAnimation->setEndValue(m_preferredHeight);
m_heightAnimation->setEasingCurve(QEasingCurve::OutCubic);
} else {
m_heightAnimation->setStartValue(height());
m_heightAnimation->setEndValue(0);
m_heightAnimation->setEasingCurve(QEasingCurve::OutCubic);
connect(m_heightAnimation, &QAbstractAnimation::finished,
this, &QWidget::hide);
}
m_heightAnimation->start();
}
void SelectionModeTopBar::resizeEvent(QResizeEvent */* resizeEvent */)
{
updateLabelString();
}
void SelectionModeTopBar::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);
}
}
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