src/statusbar/dolphinstatusbar.cpp

   1 /*
   2  * SPDX-FileCopyrightText: 2006-2012 Peter Penz <peter.penz19@gmail.com>
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-or-later
   5  */
   6
   7 #include "dolphinstatusbar.h"
   8
   9 #include "dolphin_generalsettings.h"
  10 #include "statusbarspaceinfo.h"
  11 #include "views/dolphinview.h"
  12 #include "views/zoomlevelinfo.h"
  13
  14 #include <KLocalizedString>
  15 #include <KSqueezedTextLabel>
  16
  17 #include <QApplication>
  18 #include <QHBoxLayout>
  19 #include <QHelpEvent>
  20 #include <QIcon>
  21 #include <QMenu>
  22 #include <QPainter>
  23 #include <QProgressBar>
  24 #include <QSlider>
  25 #include <QStyleOption>
  26 #include <QTimer>
  27 #include <QToolButton>
  28
  29 namespace
  30 {
  31 const int UpdateDelay = 50;
  32 }
  33
  34 DolphinStatusBar::DolphinStatusBar(QWidget *parent)
  35     : QWidget(parent)
  36     , m_text()
  37     , m_defaultText()
  38     , m_label(nullptr)
  39     , m_zoomLabel(nullptr)
  40     , m_spaceInfo(nullptr)
  41     , m_zoomSlider(nullptr)
  42     , m_progressBar(nullptr)
  43     , m_stopButton(nullptr)
  44     , m_progress(100)
  45     , m_showProgressBarTimer(nullptr)
  46     , m_delayUpdateTimer(nullptr)
  47     , m_textTimestamp()
  48 {
  49     setContentsMargins(4, 0, 4, 0);
  50
  51     // Initialize text label
  52     m_label = new KSqueezedTextLabel(m_text, this);
  53     m_label->setWordWrap(true);
  54     m_label->setTextFormat(Qt::PlainText);
  55
  56     // Initialize zoom slider's explanatory label
  57     m_zoomLabel = new QLabel(i18nc("Used as a noun, i.e. 'Here is the zoom level:'", "Zoom:"), this);
  58
  59     // Initialize zoom widget
  60     m_zoomSlider = new QSlider(Qt::Horizontal, this);
  61     m_zoomSlider->setAccessibleName(i18n("Zoom"));
  62     m_zoomSlider->setAccessibleDescription(i18nc("Description for zoom-slider (accessibility)", "Sets the size of the file icons."));
  63     m_zoomSlider->setPageStep(1);
  64     m_zoomSlider->setRange(ZoomLevelInfo::minimumLevel(), ZoomLevelInfo::maximumLevel());
  65
  66     connect(m_zoomSlider, &QSlider::valueChanged, this, &DolphinStatusBar::zoomLevelChanged);
  67     connect(m_zoomSlider, &QSlider::valueChanged, this, &DolphinStatusBar::updateZoomSliderToolTip);
  68     connect(m_zoomSlider, &QSlider::sliderMoved, this, &DolphinStatusBar::showZoomSliderToolTip);
  69
  70     // Initialize space information
  71     m_spaceInfo = new StatusBarSpaceInfo(this);
  72
  73     // Initialize progress information
  74     m_stopButton = new QToolButton(this);
  75     m_stopButton->setIcon(QIcon::fromTheme(QStringLiteral("process-stop")));
  76     m_stopButton->setAccessibleName(i18n("Stop"));
  77     m_stopButton->setAutoRaise(true);
  78     m_stopButton->setToolTip(i18nc("@tooltip", "Stop loading"));
  79     m_stopButton->hide();
  80     connect(m_stopButton, &QToolButton::clicked, this, &DolphinStatusBar::stopPressed);
  81
  82     m_progressTextLabel = new QLabel(this);
  83     m_progressTextLabel->hide();
  84
  85     m_progressBar = new QProgressBar(this);
  86     m_progressBar->hide();
  87
  88     m_showProgressBarTimer = new QTimer(this);
  89     m_showProgressBarTimer->setInterval(500);
  90     m_showProgressBarTimer->setSingleShot(true);
  91     connect(m_showProgressBarTimer, &QTimer::timeout, this, &DolphinStatusBar::updateProgressInfo);
  92
  93     // initialize text updater delay timer
  94     m_delayUpdateTimer = new QTimer(this);
  95     m_delayUpdateTimer->setInterval(UpdateDelay);
  96     m_delayUpdateTimer->setSingleShot(true);
  97     connect(m_delayUpdateTimer, &QTimer::timeout, this, &DolphinStatusBar::updateLabelText);
  98
  99     // Initialize top layout and size policies
 100     const int fontHeight = QFontMetrics(m_label->font()).height();
 101     const int zoomSliderHeight = m_zoomSlider->minimumSizeHint().height();
 102     const int buttonHeight = m_stopButton->height();
 103     const int contentHeight = qMax(qMax(fontHeight, zoomSliderHeight), buttonHeight);
 104
 105     QFontMetrics fontMetrics(m_label->font());
 106
 107     m_label->setFixedHeight(contentHeight);
 108     m_label->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
 109
 110     m_zoomSlider->setMaximumWidth(fontMetrics.averageCharWidth() * 15);
 111
 112     m_spaceInfo->setFixedHeight(contentHeight);
 113     m_spaceInfo->setMaximumWidth(fontMetrics.averageCharWidth() * 25);
 114     m_spaceInfo->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
 115
 116     m_progressBar->setFixedHeight(zoomSliderHeight);
 117     m_progressBar->setMaximumWidth(fontMetrics.averageCharWidth() * 20);
 118
 119     QHBoxLayout *topLayout = new QHBoxLayout(this);
 120     topLayout->setContentsMargins(2, 0, 2, 0);
 121     topLayout->setSpacing(4);
 122     topLayout->addWidget(m_label, 1);
 123     topLayout->addWidget(m_zoomLabel);
 124     topLayout->addWidget(m_zoomSlider, 1);
 125     topLayout->addWidget(m_spaceInfo, 1);
 126     topLayout->addWidget(m_stopButton);
 127     topLayout->addWidget(m_progressTextLabel);
 128     topLayout->addWidget(m_progressBar);
 129
 130     setVisible(GeneralSettings::showStatusBar());
 131     setExtensionsVisible(true);
 132     setWhatsThis(xi18nc("@info:whatsthis Statusbar",
 133                         "<para>This is "
 134                         "the <emphasis>Statusbar</emphasis>. It contains three elements "
 135                         "by default (left to right):<list><item>A <emphasis>text field"
 136                         "</emphasis> that displays the size of selected items. If only "
 137                         "one item is selected the name and type is shown as well.</item>"
 138                         "<item>A <emphasis>zoom slider</emphasis> that allows you "
 139                         "to adjust the size of the icons in the view.</item>"
 140                         "<item><emphasis>Space information</emphasis> about the "
 141                         "current storage device.</item></list></para>"));
 142 }
 143
 144 DolphinStatusBar::~DolphinStatusBar()
 145 {
 146 }
 147
 148 void DolphinStatusBar::setText(const QString &text)
 149 {
 150     if (m_text == text) {
 151         return;
 152     }
 153
 154     m_textTimestamp = QTime::currentTime();
 155
 156     m_text = text;
 157     // will update status bar text in 50ms
 158     m_delayUpdateTimer->start();
 159 }
 160
 161 QString DolphinStatusBar::text() const
 162 {
 163     return m_text;
 164 }
 165
 166 void DolphinStatusBar::setProgressText(const QString &text)
 167 {
 168     m_progressTextLabel->setText(text);
 169 }
 170
 171 QString DolphinStatusBar::progressText() const
 172 {
 173     return m_progressTextLabel->text();
 174 }
 175
 176 void DolphinStatusBar::setProgress(int percent)
 177 {
 178     // Show a busy indicator if a value < 0 is provided:
 179     m_progressBar->setMaximum((percent < 0) ? 0 : 100);
 180
 181     percent = qBound(0, percent, 100);
 182     const bool progressRestarted = (percent < 100) && (percent < m_progress);
 183     m_progress = percent;
 184     if (progressRestarted && !m_progressBar->isVisible()) {
 185         // Show the progress bar delayed: In the case if 100 % are reached within
 186         // a short time, no progress bar will be shown at all.
 187         m_showProgressBarTimer->start();
 188     }
 189
 190     m_progressBar->setValue(m_progress);
 191     if (percent == 100) {
 192         // The end of the progress has been reached. Assure that the progress bar
 193         // gets hidden and the extensions widgets get visible again.
 194         m_showProgressBarTimer->stop();
 195         updateProgressInfo();
 196     }
 197 }
 198
 199 int DolphinStatusBar::progress() const
 200 {
 201     return m_progress;
 202 }
 203
 204 void DolphinStatusBar::resetToDefaultText()
 205 {
 206     m_text.clear();
 207
 208     QTime currentTime;
 209     if (currentTime.msecsTo(m_textTimestamp) < UpdateDelay) {
 210         m_delayUpdateTimer->start();
 211     } else {
 212         updateLabelText();
 213     }
 214 }
 215
 216 void DolphinStatusBar::setDefaultText(const QString &text)
 217 {
 218     m_defaultText = text;
 219     updateLabelText();
 220 }
 221
 222 QString DolphinStatusBar::defaultText() const
 223 {
 224     return m_defaultText;
 225 }
 226
 227 void DolphinStatusBar::setUrl(const QUrl &url)
 228 {
 229     if (GeneralSettings::showSpaceInfo()) {
 230         m_spaceInfo->setUrl(url);
 231     }
 232 }
 233
 234 QUrl DolphinStatusBar::url() const
 235 {
 236     return m_spaceInfo->url();
 237 }
 238
 239 void DolphinStatusBar::setZoomLevel(int zoomLevel)
 240 {
 241     if (zoomLevel != m_zoomSlider->value()) {
 242         m_zoomSlider->setValue(zoomLevel);
 243     }
 244 }
 245
 246 int DolphinStatusBar::zoomLevel() const
 247 {
 248     return m_zoomSlider->value();
 249 }
 250
 251 void DolphinStatusBar::readSettings()
 252 {
 253     setVisible(GeneralSettings::showStatusBar());
 254     setExtensionsVisible(true);
 255 }
 256
 257 void DolphinStatusBar::updateSpaceInfo()
 258 {
 259     m_spaceInfo->update();
 260 }
 261
 262 void DolphinStatusBar::contextMenuEvent(QContextMenuEvent *event)
 263 {
 264     Q_UNUSED(event)
 265
 266     QMenu menu(this);
 267
 268     QAction *showZoomSliderAction = menu.addAction(i18nc("@action:inmenu", "Show Zoom Slider"));
 269     showZoomSliderAction->setCheckable(true);
 270     showZoomSliderAction->setChecked(GeneralSettings::showZoomSlider());
 271
 272     QAction *showSpaceInfoAction = menu.addAction(i18nc("@action:inmenu", "Show Space Information"));
 273     showSpaceInfoAction->setCheckable(true);
 274     showSpaceInfoAction->setChecked(GeneralSettings::showSpaceInfo());
 275
 276     const QAction *action = menu.exec(event->reason() == QContextMenuEvent::Reason::Mouse ? QCursor::pos() : mapToGlobal(QPoint(width() / 2, height() / 2)));
 277     if (action == showZoomSliderAction) {
 278         const bool visible = showZoomSliderAction->isChecked();
 279         GeneralSettings::setShowZoomSlider(visible);
 280         m_zoomSlider->setVisible(visible);
 281         m_zoomLabel->setVisible(visible);
 282     } else if (action == showSpaceInfoAction) {
 283         const bool visible = showSpaceInfoAction->isChecked();
 284         GeneralSettings::setShowSpaceInfo(visible);
 285         m_spaceInfo->setVisible(visible);
 286     }
 287 }
 288
 289 void DolphinStatusBar::showZoomSliderToolTip(int zoomLevel)
 290 {
 291     updateZoomSliderToolTip(zoomLevel);
 292
 293     QPoint global = m_zoomSlider->rect().topLeft();
 294     global.ry() += m_zoomSlider->height() / 2;
 295     QHelpEvent toolTipEvent(QEvent::ToolTip, QPoint(0, 0), m_zoomSlider->mapToGlobal(global));
 296     QApplication::sendEvent(m_zoomSlider, &toolTipEvent);
 297 }
 298
 299 void DolphinStatusBar::updateProgressInfo()
 300 {
 301     if (m_progress < 100) {
 302         // Show the progress information and hide the extensions
 303         m_stopButton->show();
 304         m_progressTextLabel->show();
 305         m_progressBar->show();
 306         setExtensionsVisible(false);
 307     } else {
 308         // Hide the progress information and show the extensions
 309         m_stopButton->hide();
 310         m_progressTextLabel->hide();
 311         m_progressBar->hide();
 312         setExtensionsVisible(true);
 313     }
 314 }
 315
 316 void DolphinStatusBar::updateLabelText()
 317 {
 318     const QString text = m_text.isEmpty() ? m_defaultText : m_text;
 319     m_label->setText(text);
 320 }
 321
 322 void DolphinStatusBar::updateZoomSliderToolTip(int zoomLevel)
 323 {
 324     const int size = ZoomLevelInfo::iconSizeForZoomLevel(zoomLevel);
 325     m_zoomSlider->setToolTip(i18ncp("@info:tooltip", "Size: 1 pixel", "Size: %1 pixels", size));
 326 }
 327
 328 void DolphinStatusBar::setExtensionsVisible(bool visible)
 329 {
 330     bool showSpaceInfo = visible;
 331     bool showZoomSlider = visible;
 332     if (visible) {
 333         showSpaceInfo = GeneralSettings::showSpaceInfo();
 334         showZoomSlider = GeneralSettings::showZoomSlider();
 335     }
 336
 337     m_spaceInfo->setShown(showSpaceInfo);
 338     m_spaceInfo->setVisible(showSpaceInfo);
 339     m_zoomSlider->setVisible(showZoomSlider);
 340     m_zoomLabel->setVisible(showZoomSlider);
 341 }
 342
 343 void DolphinStatusBar::paintEvent(QPaintEvent *paintEvent)
 344 {
 345     QPainter p(this);
 346     QStyleOption opt;
 347     opt.initFrom(this);
 348     style()->drawPrimitive(QStyle::PE_PanelStatusBar, &opt, &p, this);
 349 }
 350
 351 #include "moc_dolphinstatusbar.cpp"