src/dolphinstatusbar.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Peter Penz                                      *
   3  *   peter.penz@gmx.at                                                     *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  19  ***************************************************************************/
  20
  21 #include "dolphinstatusbar.h"
  22 #include "settings/dolphinsettings.h"
  23 #include "dolphinview.h"
  24 #include "dolphin_generalsettings.h"
  25 #include "statusbarmessagelabel.h"
  26 #include "statusbarspaceinfo.h"
  27 #include "zoomlevelinfo.h"
  28
  29 #include <QApplication>
  30 #include <QHBoxLayout>
  31 #include <QLabel>
  32 #include <QProgressBar>
  33 #include <QToolButton>
  34 #include <QTimer>
  35
  36 #include <kiconloader.h>
  37 #include <kicon.h>
  38 #include <klocale.h>
  39 #include <kvbox.h>
  40
  41 DolphinStatusBar::DolphinStatusBar(QWidget* parent, DolphinView* view) :
  42     KHBox(parent),
  43     m_view(view),
  44     m_messageLabel(0),
  45     m_spaceInfo(0),
  46     m_zoomWidget(0),
  47     m_zoomOut(0),
  48     m_zoomSlider(0),
  49     m_zoomIn(0),
  50     m_progressBar(0),
  51     m_progress(100)
  52 {
  53     setMargin(0);
  54     setSpacing(4);
  55
  56     connect(m_view, SIGNAL(urlChanged(const KUrl&)),
  57             this, SLOT(updateSpaceInfoContent(const KUrl&)));
  58
  59     // initialize message label
  60     m_messageLabel = new StatusBarMessageLabel(this);
  61     m_messageLabel->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
  62
  63     // initialize zoom slider
  64     m_zoomWidget = new QWidget(this);
  65
  66     m_zoomOut = new QToolButton(m_zoomWidget);
  67     m_zoomOut->setIcon(KIcon("zoom-out"));
  68     m_zoomOut->setAutoRaise(true);
  69
  70     m_zoomSlider = new QSlider(Qt::Horizontal, m_zoomWidget);
  71     m_zoomSlider->setPageStep(1);
  72
  73     const int min = ZoomLevelInfo::minimumLevel();
  74     const int max = ZoomLevelInfo::maximumLevel();
  75     m_zoomSlider->setRange(min, max);
  76     m_zoomSlider->setValue(view->zoomLevel());
  77     updateZoomSliderToolTip(view->zoomLevel());
  78
  79     m_zoomIn = new QToolButton(m_zoomWidget);
  80     m_zoomIn->setIcon(KIcon("zoom-in"));
  81     m_zoomIn->setAutoRaise(true);
  82
  83     QHBoxLayout* zoomWidgetLayout = new QHBoxLayout(m_zoomWidget);
  84     zoomWidgetLayout->setSpacing(0);
  85     zoomWidgetLayout->setMargin(0);
  86     zoomWidgetLayout->addWidget(m_zoomOut);
  87     zoomWidgetLayout->addWidget(m_zoomSlider);
  88     zoomWidgetLayout->addWidget(m_zoomIn);
  89
  90     connect(m_zoomSlider, SIGNAL(valueChanged(int)), this, SLOT(setZoomLevel(int)));
  91     connect(m_zoomSlider, SIGNAL(sliderMoved(int)), this, SLOT(showZoomSliderToolTip(int)));
  92     connect(m_view, SIGNAL(zoomLevelChanged(int)), m_zoomSlider, SLOT(setValue(int)));
  93     connect(m_zoomOut, SIGNAL(clicked()), this, SLOT(zoomOut()));
  94     connect(m_zoomIn, SIGNAL(clicked()), this, SLOT(zoomIn()));
  95
  96     // initialize space information
  97     m_spaceInfo = new StatusBarSpaceInfo(this);
  98     m_spaceInfo->setUrl(m_view->url());
  99
 100     // initialize progress information
 101     m_progressText = new QLabel(this);
 102     m_progressText->hide();
 103
 104     m_progressBar = new QProgressBar(this);
 105     m_progressBar->hide();
 106
 107     // initialize sizes
 108     const int fontHeight = QFontMetrics(m_messageLabel->font()).height();
 109     const int zoomWidgetHeight = m_zoomWidget->minimumSizeHint().height();
 110     const int contentHeight = (fontHeight < zoomWidgetHeight) ? zoomWidgetHeight : fontHeight;
 111
 112     m_messageLabel->setMinimumTextHeight(contentHeight);
 113     m_spaceInfo->setFixedHeight(contentHeight);
 114     m_progressBar->setFixedSize(200, contentHeight);
 115     m_zoomWidget->setFixedSize(150, contentHeight);
 116
 117     setExtensionsVisible(true);
 118 }
 119
 120 DolphinStatusBar::~DolphinStatusBar()
 121 {
 122 }
 123
 124 void DolphinStatusBar::setMessage(const QString& msg,
 125                                   Type type)
 126 {
 127     if (msg.isEmpty()) {
 128         // show the default text as fallback
 129         clear();
 130         return;
 131     }
 132
 133     if ((msg == m_messageLabel->text()) && (type == m_messageLabel->type())) {
 134         // the message is already shown
 135         return;
 136     }
 137
 138     m_messageLabel->setMessage(msg, type);
 139
 140     const int widthGap = m_messageLabel->widthGap();
 141     if (widthGap > 0) {
 142         m_progressBar->hide();
 143         m_progressText->hide();
 144     }
 145     assureVisibleText();
 146 }
 147
 148 DolphinStatusBar::Type DolphinStatusBar::type() const
 149 {
 150     return m_messageLabel->type();
 151 }
 152
 153 QString DolphinStatusBar::message() const
 154 {
 155     return m_messageLabel->text();
 156 }
 157
 158 void DolphinStatusBar::setProgressText(const QString& text)
 159 {
 160     m_progressText->setText(text);
 161 }
 162
 163 QString DolphinStatusBar::progressText() const
 164 {
 165     return m_progressText->text();
 166 }
 167
 168 void DolphinStatusBar::setProgress(int percent)
 169 {
 170     if (percent < 0) {
 171         percent = 0;
 172     } else if (percent > 100) {
 173         percent = 100;
 174     }
 175
 176     m_progress = percent;
 177     if (m_messageLabel->type() == Error) {
 178         // don't update any widget or status bar text if an
 179         // error message is shown
 180         return;
 181     }
 182
 183     m_progressBar->setValue(m_progress);
 184     if (!m_progressBar->isVisible() || (percent == 100)) {
 185         QTimer::singleShot(300, this, SLOT(updateProgressInfo()));
 186     }
 187
 188     const QString& defaultText = m_messageLabel->defaultText();
 189     const QString msg(m_messageLabel->text());
 190     if ((percent == 0) && !msg.isEmpty()) {
 191         setMessage(QString(), Default);
 192     } else if ((percent == 100) && (msg != defaultText)) {
 193         setMessage(defaultText, Default);
 194     }
 195 }
 196
 197 void DolphinStatusBar::clear()
 198 {
 199     setMessage(m_messageLabel->defaultText(), Default);
 200 }
 201
 202 void DolphinStatusBar::setDefaultText(const QString& text)
 203 {
 204     m_messageLabel->setDefaultText(text);
 205 }
 206
 207 const QString& DolphinStatusBar::defaultText() const
 208 {
 209     return m_messageLabel->defaultText();
 210 }
 211
 212 void DolphinStatusBar::refresh()
 213 {
 214     setExtensionsVisible(true);
 215     assureVisibleText();
 216 }
 217
 218 void DolphinStatusBar::resizeEvent(QResizeEvent* event)
 219 {
 220     // It is important to hide the widgets before invoking
 221     // QWidget::resizeEvent(), otherwise it is possible that
 222     // the dock widgets are shrinked when having a small
 223     // statusbar width (bug #202147).
 224     m_zoomWidget->hide();
 225     m_spaceInfo->hide();
 226
 227     QWidget::resizeEvent(event);
 228     QMetaObject::invokeMethod(this, "assureVisibleText", Qt::QueuedConnection);
 229 }
 230
 231 void DolphinStatusBar::updateProgressInfo()
 232 {
 233     const bool isErrorShown = (m_messageLabel->type() == Error);
 234     if (m_progress < 100) {
 235         // show the progress information and hide the extensions
 236         setExtensionsVisible(false);
 237         if (!isErrorShown) {
 238             m_progressText->show();
 239             m_progressBar->show();
 240         }
 241     } else {
 242         // hide the progress information and show the extensions
 243         m_progressText->hide();
 244         m_progressBar->hide();
 245         assureVisibleText();
 246     }
 247 }
 248
 249 void DolphinStatusBar::updateSpaceInfoContent(const KUrl& url)
 250 {
 251     m_spaceInfo->setUrl(url);
 252     assureVisibleText();
 253 }
 254
 255 void DolphinStatusBar::setZoomLevel(int zoomLevel)
 256 {
 257     m_zoomOut->setEnabled(zoomLevel > m_zoomSlider->minimum());
 258     m_zoomIn->setEnabled(zoomLevel < m_zoomSlider->maximum());
 259     m_view->setZoomLevel(zoomLevel);
 260     updateZoomSliderToolTip(zoomLevel);
 261 }
 262
 263 void DolphinStatusBar::assureVisibleText()
 264 {
 265     const int widthGap = m_messageLabel->widthGap();
 266     if (m_spaceInfo->isVisible() || m_zoomWidget->isVisible()) {
 267         // At least the space information or the zoom slider is shown.
 268         // Hide them if the status bar text does not fit into the available width.
 269         if (widthGap > 0) {
 270             setExtensionsVisible(false);
 271         }
 272     } else if (!m_progressBar->isVisible()) {
 273         const GeneralSettings* settings = DolphinSettings::instance().generalSettings();
 274         const int spaceInfoWidth  = settings->showSpaceInfo()  ? m_spaceInfo->minimumWidth()  : 0;
 275         const int zoomWidgetWidth = settings->showZoomSlider() ? m_zoomWidget->minimumWidth() : 0;
 276         const int widgetsWidth = spaceInfoWidth + zoomWidgetWidth;
 277
 278         if (widthGap + widgetsWidth <= 0) {
 279             setExtensionsVisible(true);
 280         }
 281     }
 282 }
 283
 284 void DolphinStatusBar::zoomOut()
 285 {
 286     const int value = m_zoomSlider->value();
 287     m_zoomSlider->setValue(value - 1);
 288 }
 289
 290 void DolphinStatusBar::zoomIn()
 291 {
 292     const int value = m_zoomSlider->value();
 293     m_zoomSlider->setValue(value + 1);
 294 }
 295
 296 void DolphinStatusBar::showZoomSliderToolTip(int zoomLevel)
 297 {
 298     updateZoomSliderToolTip(zoomLevel);
 299
 300     QPoint global = m_zoomSlider->rect().topLeft();
 301     global.ry() += m_zoomSlider->height() / 2;
 302     QHelpEvent toolTipEvent(QEvent::ToolTip, QPoint(0, 0), m_zoomSlider->mapToGlobal(global));
 303     QApplication::sendEvent(m_zoomSlider, &toolTipEvent);
 304 }
 305
 306 void DolphinStatusBar::setExtensionsVisible(bool visible)
 307 {
 308     bool spaceInfoVisible = visible;
 309     bool zoomSliderVisible = visible;
 310     if (visible) {
 311         const GeneralSettings* settings = DolphinSettings::instance().generalSettings();
 312         spaceInfoVisible = settings->showSpaceInfo();
 313         zoomSliderVisible = settings->showZoomSlider();
 314     }
 315
 316     m_spaceInfo->setVisible(spaceInfoVisible);
 317     m_zoomWidget->setVisible(zoomSliderVisible);
 318 }
 319
 320 void DolphinStatusBar::updateZoomSliderToolTip(int zoomLevel)
 321 {
 322     const int size = ZoomLevelInfo::iconSizeForZoomLevel(zoomLevel);
 323     m_zoomSlider->setToolTip(i18ncp("@info:tooltip", "Size: 1 pixel", "Size: %1 pixels", size));
 324 }
 325
 326 #include "dolphinstatusbar.moc"