src/infosidebarpage.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Peter Penz <peter.penz@gmx.at>                  *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  18  ***************************************************************************/
  19
  20 #include "infosidebarpage.h"
  21 #include <assert.h>
  22
  23 #include <qlayout.h>
  24 #include <qpixmap.h>
  25 #include <qlabel.h>
  26 #include <qtimer.h>
  27 #include <qpushbutton.h>
  28 #include <q3vbox.h>
  29 #include <q3vgroupbox.h>
  30 #include <q3popupmenu.h>
  31 #include <qpainter.h>
  32 #include <qfontmetrics.h>
  33 #include <q3grid.h>
  34 #include <q3hgroupbox.h>
  35 //Added by qt3to4:
  36 #include <Q3ValueList>
  37 #include <QEvent>
  38 #include <Q3VBoxLayout>
  39
  40 #include <kbookmarkmanager.h>
  41 #include <klocale.h>
  42 #include <kstandarddirs.h>
  43 #include <kio/previewjob.h>
  44 #include <kfileitem.h>
  45 #include <kdialog.h>
  46 #include <kglobalsettings.h>
  47 #include <kfilemetainfo.h>
  48
  49 #include "dolphin.h"
  50 #include "pixmapviewer.h"
  51 #include "dolphinsettings.h"
  52
  53 InfoSidebarPage::InfoSidebarPage(QWidget* parent) :
  54     SidebarPage(parent),
  55     m_multipleSelection(false),
  56     m_pendingPreview(false),
  57     m_timer(0),
  58     m_preview(0),
  59     m_name(0),
  60     m_currInfoLineIdx(0),
  61     m_infoGrid(0),
  62     m_actionBox(0)
  63 {
  64     const int spacing = KDialog::spacingHint();
  65
  66     m_timer = new QTimer(this);
  67     connect(m_timer, SIGNAL(timeout()),
  68             this, SLOT(slotTimeout()));
  69
  70     Q3VBoxLayout* layout = new Q3VBoxLayout(this);
  71     layout->setSpacing(spacing);
  72
  73     // preview
  74     m_preview = new PixmapViewer(this);
  75     m_preview->setMinimumWidth(KIcon::SizeEnormous);
  76     m_preview->setFixedHeight(KIcon::SizeEnormous);
  77
  78     // name
  79     m_name = new QLabel(this);
  80     m_name->setTextFormat(Qt::RichText);
  81     m_name->setAlignment(m_name->alignment() | Qt::AlignHCenter);
  82     QFontMetrics fontMetrics(m_name->font());
  83     m_name->setMinimumHeight(fontMetrics.height() * 3);
  84     m_name->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Maximum);
  85
  86     QWidget* sep1 = new Q3HGroupBox(this);  // TODO: check whether default widget exist for this?
  87     sep1->setFixedHeight(1);
  88
  89     // general information
  90     m_infoGrid = new Q3Grid(2, this);
  91     m_infoGrid->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
  92
  93     QWidget* sep2 = new Q3HGroupBox(this);  // TODO: check whether default widget exist for this?
  94     sep2->setFixedHeight(1);
  95
  96     // actions
  97     m_actionBox = new Q3VBox(this);
  98     m_actionBox->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
  99
 100     // Add a dummy widget with no restriction regarding a vertical resizing.
 101     // This assures that information is always top aligned.
 102     QWidget* dummy = new QWidget(this);
 103
 104     layout->addItem(new QSpacerItem(spacing, spacing, QSizePolicy::Preferred, QSizePolicy::Fixed));
 105     layout->addWidget(m_preview);
 106     layout->addWidget(m_name);
 107     layout->addWidget(sep1);
 108     layout->addWidget(m_infoGrid);
 109     layout->addWidget(sep2);
 110     layout->addWidget(m_actionBox);
 111     layout->addWidget(dummy);
 112
 113     connect(&Dolphin::mainWin(), SIGNAL(selectionChanged()),
 114             this, SLOT(showItemInfo()));
 115
 116     connectToActiveView();
 117 }
 118
 119 InfoSidebarPage::~InfoSidebarPage()
 120 {
 121 }
 122
 123 void InfoSidebarPage::activeViewChanged()
 124 {
 125     connectToActiveView();
 126 }
 127
 128 void InfoSidebarPage::requestDelayedItemInfo(const KURL& url)
 129 {
 130     cancelRequest();
 131
 132     if (!url.isEmpty() && !m_multipleSelection) {
 133         m_urlCandidate = url;
 134         m_timer->start(300, true);
 135     }
 136 }
 137
 138 void InfoSidebarPage::requestItemInfo(const KURL& url)
 139 {
 140     cancelRequest();
 141
 142     if (!url.isEmpty() && !m_multipleSelection) {
 143         m_shownURL = url;
 144         showItemInfo();
 145     }
 146 }
 147
 148 void InfoSidebarPage::showItemInfo()
 149 {
 150     cancelRequest();
 151
 152     m_multipleSelection = false;
 153
 154     // show the preview...
 155     DolphinView* view = Dolphin::mainWin().activeView();
 156     const KFileItemList* selectedItems = view->selectedItems();
 157     if ((selectedItems != 0) && selectedItems->count() > 1) {
 158         m_multipleSelection = true;
 159     }
 160
 161     if (m_multipleSelection) {
 162         KIconLoader iconLoader;
 163         QPixmap icon = iconLoader.loadIcon("exec",
 164                                            KIcon::NoGroup,
 165                                            KIcon::SizeEnormous);
 166         m_preview->setPixmap(icon);
 167         m_name->setText(i18n("%1 items selected").arg(selectedItems->count()));
 168     }
 169     else if (!applyBookmark()) {
 170         // try to get a preview pixmap from the item...
 171         KURL::List list;
 172         list.append(m_shownURL);
 173
 174         m_pendingPreview = true;
 175         m_preview->setPixmap(QPixmap());
 176
 177         KIO::PreviewJob* job = KIO::filePreview(list,
 178                                                 m_preview->width(),
 179                                                 KIcon::SizeEnormous);
 180         connect(job, SIGNAL(gotPreview(const KFileItem*, const QPixmap&)),
 181                 this, SLOT(gotPreview(const KFileItem*, const QPixmap&)));
 182         connect(job, SIGNAL(failed(const KFileItem*)),
 183                 this, SLOT(slotPreviewFailed(const KFileItem*)));
 184
 185         QString text("<b>");
 186         text.append(m_shownURL.fileName());
 187         text.append("</b>");
 188         m_name->setText(text);
 189     }
 190
 191     createMetaInfo();
 192     insertActions();
 193 }
 194
 195 void InfoSidebarPage::slotTimeout()
 196 {
 197     m_shownURL = m_urlCandidate;
 198     showItemInfo();
 199 }
 200
 201 void InfoSidebarPage::slotPreviewFailed(const KFileItem* item)
 202 {
 203     m_pendingPreview = false;
 204     if (!applyBookmark()) {
 205         m_preview->setPixmap(item->pixmap(KIcon::SizeEnormous));
 206     }
 207 }
 208
 209 void InfoSidebarPage::gotPreview(const KFileItem* /* item */,
 210                                  const QPixmap& pixmap)
 211 {
 212     if (m_pendingPreview) {
 213         m_preview->setPixmap(pixmap);
 214         m_pendingPreview = false;
 215     }
 216 }
 217
 218 void InfoSidebarPage::startService(int index)
 219 {
 220     DolphinView* view = Dolphin::mainWin().activeView();
 221     if (view->hasSelection()) {
 222         KURL::List selectedURLs = view->selectedURLs();
 223         KDEDesktopMimeType::executeService(selectedURLs, m_actionsVector[index]);
 224     }
 225     else {
 226         KDEDesktopMimeType::executeService(m_shownURL, m_actionsVector[index]);
 227     }
 228 }
 229
 230 void InfoSidebarPage::connectToActiveView()
 231 {
 232     cancelRequest();
 233
 234     DolphinView* view = Dolphin::mainWin().activeView();
 235     connect(view, SIGNAL(signalRequestItemInfo(const KURL&)),
 236             this, SLOT(requestDelayedItemInfo(const KURL&)));
 237     connect(view, SIGNAL(signalURLChanged(const KURL&)),
 238             this, SLOT(requestItemInfo(const KURL&)));
 239
 240     m_shownURL = view->url();
 241     showItemInfo();
 242 }
 243
 244 bool InfoSidebarPage::applyBookmark()
 245 {
 246     KBookmarkGroup root = DolphinSettings::instance().bookmarkManager()->root();
 247     KBookmark bookmark = root.first();
 248     while (!bookmark.isNull()) {
 249         if (m_shownURL.equals(bookmark.url(), true)) {
 250             QString text("<b>");
 251             text.append(bookmark.text());
 252             text.append("</b>");
 253             m_name->setText(text);
 254
 255             KIconLoader iconLoader;
 256             QPixmap icon = iconLoader.loadIcon(bookmark.icon(),
 257                                                KIcon::NoGroup,
 258                                                KIcon::SizeEnormous);
 259             m_preview->setPixmap(icon);
 260             return true;
 261         }
 262         bookmark = root.next(bookmark);
 263     }
 264
 265     return false;
 266 }
 267
 268 void InfoSidebarPage::cancelRequest()
 269 {
 270     m_timer->stop();
 271     m_pendingPreview = false;
 272 }
 273
 274 void InfoSidebarPage::createMetaInfo()
 275 {
 276     // To prevent a flickering it's important to reuse available
 277     // labels instead of deleting them and recreate them afterwards.
 278     // The methods beginInfoLines(), addInfoLine() and endInfoLines()
 279     // take care of this.
 280     beginInfoLines();
 281     DolphinView* view = Dolphin::mainWin().activeView();
 282     if (!view->hasSelection()) {
 283         KFileItem fileItem(S_IFDIR, KFileItem::Unknown, m_shownURL);
 284         fileItem.refresh();
 285
 286         if (fileItem.isDir()) {
 287             addInfoLine(i18n("Type:"), i18n("Directory"));
 288         }
 289         else {
 290             addInfoLine(i18n("Type:"), fileItem.mimeComment());
 291
 292             QString sizeText(KIO::convertSize(fileItem.size()));
 293             addInfoLine(i18n("Size:"), sizeText);
 294             addInfoLine(i18n("Modified:"), fileItem.timeString());
 295
 296             const KFileMetaInfo& metaInfo = fileItem.metaInfo();
 297             if (metaInfo.isValid()) {
 298                 QStringList keys = metaInfo.supportedKeys();
 299                 for (QStringList::Iterator it = keys.begin(); it != keys.end(); ++it) {
 300                     if (showMetaInfo(*it)) {
 301                         KFileMetaInfoItem metaInfoItem = metaInfo.item(*it);
 302                         addInfoLine(*it, metaInfoItem.string());
 303                     }
 304                 }
 305             }
 306         }
 307     }
 308     endInfoLines();
 309 }
 310
 311 void InfoSidebarPage::beginInfoLines()
 312 {
 313     m_currInfoLineIdx = 0;
 314 }
 315
 316 void InfoSidebarPage::endInfoLines()
 317 {
 318     if (m_currInfoLineIdx <= 0) {
 319         return;
 320     }
 321
 322     // remove labels which have not been used
 323     if (m_currInfoLineIdx < static_cast<int>(m_infoWidgets.count())) {
 324         Q3PtrListIterator<QLabel> deleteIter(m_infoWidgets);
 325         deleteIter += m_currInfoLineIdx;
 326
 327         QWidget* widget = 0;
 328         int removeCount = 0;
 329         while ((widget = deleteIter.current()) != 0) {
 330             widget->close();
 331             widget->deleteLater();
 332             ++deleteIter;
 333             ++removeCount;
 334         }
 335         for (int i = 0; i < removeCount; ++i) {
 336             m_infoWidgets.removeLast();
 337         }
 338     }
 339 }
 340
 341 bool InfoSidebarPage::showMetaInfo(const QString& key) const
 342 {
 343     // sorted list of keys, where it's data should be shown
 344     static const char* keys[] = {
 345         "Album",
 346         "Artist",
 347         "Author",
 348         "Bitrate",
 349         "Date",
 350         "Dimensions",
 351         "Genre",
 352         "Length",
 353         "Lines",
 354         "Pages",
 355         "Title",
 356         "Words"
 357     };
 358
 359     // do a binary search for the key...
 360     int top = 0;
 361     int bottom = sizeof(keys) / sizeof(char*) - 1;
 362     while (top < bottom) {
 363         const int middle = (top + bottom) / 2;
 364         const int result = key.compare(keys[middle]);
 365         if (result < 0) {
 366             bottom = middle - 1;
 367         }
 368         else if (result > 0) {
 369             top = middle + 1;
 370         }
 371         else {
 372             return true;
 373         }
 374     }
 375
 376     return false;
 377 }
 378
 379 void InfoSidebarPage::addInfoLine(const QString& labelText, const QString& infoText)
 380 {
 381     QString labelStr("<b>");
 382     labelStr.append(labelText);
 383     labelStr.append("</b>&nbsp;");
 384
 385     const int count = m_infoWidgets.count();
 386     if (m_currInfoLineIdx < count - 1) {
 387         // reuse available labels
 388         m_infoWidgets.at(m_currInfoLineIdx++)->setText(labelStr);
 389         m_infoWidgets.at(m_currInfoLineIdx++)->setText(infoText);
 390     }
 391     else {
 392         // no labels are available anymore, hence create 2 new ones
 393         QLabel* label = new QLabel(labelStr, m_infoGrid);
 394         label->setTextFormat(Qt::RichText);
 395         label->setAlignment(Qt::AlignRight |
 396                             Qt::AlignTop);
 397         label->show();
 398         m_infoWidgets.append(label);
 399
 400         QLabel* info = new QLabel(infoText, m_infoGrid);
 401         info->setTextFormat(Qt::RichText);
 402         info->setAlignment(Qt::AlignTop | Qt::WordBreak);
 403         info->show();
 404         m_infoWidgets.append(info);
 405
 406         m_currInfoLineIdx += 2;
 407     }
 408 }
 409
 410 void InfoSidebarPage::insertActions()
 411 {
 412     // delete all existing action widgets
 413     // TODO: just use children() from QObject...
 414     Q3PtrListIterator<QWidget> deleteIter(m_actionWidgets);
 415     QWidget* widget = 0;
 416     while ((widget = deleteIter.current()) != 0) {
 417         widget->close();
 418         widget->deleteLater();
 419         ++deleteIter;
 420     }
 421
 422     m_actionWidgets.clear();
 423     m_actionsVector.clear();
 424
 425     int actionsIndex = 0;
 426
 427     // The algorithm for searching the available actions works on a list
 428     // of KFileItems. If no selection is given, a temporary KFileItem
 429     // by the given URL 'url' is created and added to the list.
 430     KFileItem fileItem(S_IFDIR, KFileItem::Unknown, m_shownURL);
 431     KFileItemList localList;
 432     const KFileItemList* itemList = Dolphin::mainWin().activeView()->selectedItems();
 433     if ((itemList == 0) || itemList->isEmpty()) {
 434         fileItem.refresh();
 435         localList.append(&fileItem);
 436         itemList = &localList;
 437     }
 438
 439     // 'itemList' contains now all KFileItems, where an item information should be shown.
 440     // TODO: the following algorithm is quite equal to DolphinContextMenu::insertActionItems().
 441     // It's open yet whether they should be merged or whether they have to work slightly different.
 442     QStringList dirs = KGlobal::dirs()->findDirs("data", "dolphin/servicemenus/");
 443     for (QStringList::ConstIterator dirIt = dirs.begin(); dirIt != dirs.end(); ++dirIt) {
 444         QDir dir(*dirIt);
 445         QStringList entries = dir.entryList("*.desktop", QDir::Files);
 446
 447         for (QStringList::ConstIterator entryIt = entries.begin(); entryIt != entries.end(); ++entryIt) {
 448             KSimpleConfig cfg(*dirIt + *entryIt, true);
 449             cfg.setDesktopGroup();
 450             if ((cfg.hasKey("Actions") || cfg.hasKey("X-KDE-GetActionMenu")) && cfg.hasKey("ServiceTypes")) {
 451                 const QStringList types = cfg.readListEntry("ServiceTypes");
 452                 for (QStringList::ConstIterator it = types.begin(); it != types.end(); ++it) {
 453                     // check whether the mime type is equal or whether the
 454                     // mimegroup (e. g. image/*) is supported
 455
 456                     bool insert = false;
 457                     if ((*it) == "all/allfiles") {
 458                         // The service type is valid for all files, but not for directories.
 459                         // Check whether the selected items only consist of files...
 460                         KFileItemListIterator mimeIt(*itemList);
 461                         KFileItem* item = 0;
 462                         insert = true;
 463                         while (insert && ((item = mimeIt.current()) != 0)) {
 464                             insert = !item->isDir();
 465                             ++mimeIt;
 466                         }
 467                     }
 468
 469                     if (!insert) {
 470                         // Check whether the MIME types of all selected files match
 471                         // to the mimetype of the service action. As soon as one MIME
 472                         // type does not match, no service menu is shown at all.
 473                         KFileItemListIterator mimeIt(*itemList);
 474                         KFileItem* item = 0;
 475                         insert = true;
 476                         while (insert && ((item = mimeIt.current()) != 0)) {
 477                             const QString mimeType((*mimeIt)->mimetype());
 478                             const QString mimeGroup(mimeType.left(mimeType.find('/')));
 479
 480                             insert  = (*it == mimeType) ||
 481                                       ((*it).right(1) == "*") &&
 482                                       ((*it).left((*it).find('/')) == mimeGroup);
 483                             ++mimeIt;
 484                         }
 485                     }
 486
 487                     if (insert) {
 488                         const QString submenuName = cfg.readEntry( "X-KDE-Submenu" );
 489                         Q3PopupMenu* popup = 0;
 490                         if (!submenuName.isEmpty()) {
 491                             // create a sub menu containing all actions
 492                             popup = new Q3PopupMenu();
 493                             connect(popup, SIGNAL(activated(int)),
 494                                     this, SLOT(startService(int)));
 495
 496                             QPushButton* button = new QPushButton(submenuName, m_actionBox);
 497                             button->setFlat(true);
 498                             button->setPopup(popup);
 499                             button->show();
 500                             m_actionWidgets.append(button);
 501                         }
 502
 503                         Q3ValueList<KDEDesktopMimeType::Service> userServices =
 504                             KDEDesktopMimeType::userDefinedServices(*dirIt + *entryIt, true);
 505
 506                         // iterate through all actions and add them to a widget
 507                         Q3ValueList<KDEDesktopMimeType::Service>::Iterator serviceIt;
 508                         for (serviceIt = userServices.begin(); serviceIt != userServices.end(); ++serviceIt) {
 509                             KDEDesktopMimeType::Service service = (*serviceIt);
 510                             if (popup == 0) {
 511                                 ServiceButton* button = new ServiceButton(SmallIcon(service.m_strIcon),
 512                                                                           service.m_strName,
 513                                                                           m_actionBox,
 514                                                                           actionsIndex);
 515                                 connect(button, SIGNAL(requestServiceStart(int)),
 516                                         this, SLOT(startService(int)));
 517                                 m_actionWidgets.append(button);
 518                                 button->show();
 519                             }
 520                             else {
 521                                 popup->insertItem(SmallIcon(service.m_strIcon), service.m_strName, actionsIndex);
 522                             }
 523
 524                             m_actionsVector.append(service);
 525                             ++actionsIndex;
 526                         }
 527                     }
 528                 }
 529             }
 530         }
 531     }
 532 }
 533
 534 ServiceButton::ServiceButton(const QIcon& icon,
 535                              const QString& text,
 536                              QWidget* parent,
 537                              int index) :
 538     QPushButton(icon, text, parent),
 539     m_hover(false),
 540     m_index(index)
 541 {
 542     setEraseColor(colorGroup().background());
 543     setFocusPolicy(Qt::NoFocus);
 544     connect(this, SIGNAL(released()),
 545             this, SLOT(slotReleased()));
 546 }
 547
 548 ServiceButton::~ServiceButton()
 549 {
 550 }
 551
 552 void ServiceButton::drawButton(QPainter* painter)
 553 {
 554     const int buttonWidth  = width();
 555     const int buttonHeight = height();
 556
 557     QColor backgroundColor;
 558     QColor foregroundColor;
 559     if (m_hover) {
 560         backgroundColor = KGlobalSettings::highlightColor();
 561         foregroundColor = KGlobalSettings::highlightedTextColor();
 562     }
 563     else {
 564         backgroundColor = colorGroup().background();
 565         foregroundColor = KGlobalSettings::buttonTextColor();
 566     }
 567
 568     // draw button background
 569     painter->setPen(NoPen);
 570     painter->setBrush(backgroundColor);
 571     painter->drawRect(0, 0, buttonWidth, buttonHeight);
 572
 573     const int spacing = KDialog::spacingHint();
 574
 575     // draw icon
 576     int x = spacing;
 577     const int y = (buttonHeight - KIcon::SizeSmall) / 2;
 578     const QIcon* set = iconSet();
 579     if (set != 0) {
 580         painter->drawPixmap(x, y, set->pixmap(QIcon::Small, QIcon::Normal));
 581     }
 582     x += KIcon::SizeSmall + spacing;
 583
 584     // draw text
 585     painter->setPen(foregroundColor);
 586
 587     const int textWidth = buttonWidth - x;
 588     QFontMetrics fontMetrics(font());
 589     const bool clipped = fontMetrics.width(text()) >= textWidth;
 590     //const int align = clipped ? Qt::AlignVCenter : Qt::AlignCenter;
 591     painter->drawText(QRect(x, 0, textWidth, buttonHeight), Qt::AlignVCenter, text());
 592
 593     if (clipped) {
 594         // Blend the right area of the text with the background, as the
 595         // text is clipped.
 596         // TODO #1: use alpha blending in Qt4 instead of drawing the text that often
 597         // TODO #2: same code as in URLNavigatorButton::drawButton() -> provide helper class?
 598         const int blendSteps = 16;
 599
 600         QColor blendColor(backgroundColor);
 601         const int redInc   = (foregroundColor.red()   - backgroundColor.red())   / blendSteps;
 602         const int greenInc = (foregroundColor.green() - backgroundColor.green()) / blendSteps;
 603         const int blueInc  = (foregroundColor.blue()  - backgroundColor.blue())  / blendSteps;
 604         for (int i = 0; i < blendSteps; ++i) {
 605             painter->setClipRect(QRect(x + textWidth - i, 0, 1, buttonHeight));
 606             painter->setPen(blendColor);
 607             painter->drawText(QRect(x, 0, textWidth, buttonHeight), Qt::AlignVCenter, text());
 608
 609             blendColor.setRgb(blendColor.red()   + redInc,
 610                               blendColor.green() + greenInc,
 611                               blendColor.blue()  + blueInc);
 612         }
 613     }
 614 }
 615
 616 void ServiceButton::enterEvent(QEvent* event)
 617 {
 618     QPushButton::enterEvent(event);
 619     m_hover = true;
 620     update();
 621 }
 622
 623 void ServiceButton::leaveEvent(QEvent* event)
 624 {
 625     QPushButton::leaveEvent(event);
 626     m_hover = false;
 627     update();
 628 }
 629
 630 void ServiceButton::slotReleased()
 631 {
 632     emit requestServiceStart(m_index);
 633 }
 634