src/dolphincolumnview.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2007 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  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  18  ***************************************************************************/
  19
  20 #include "dolphincolumnview.h"
  21
  22 #include "dolphincontroller.h"
  23 #include "dolphinsettings.h"
  24
  25 #include "dolphin_columnmodesettings.h"
  26
  27 #include <kcolorutils.h>
  28 #include <kcolorscheme.h>
  29 #include <kdirmodel.h>
  30
  31 #include <QAbstractProxyModel>
  32 #include <QPoint>
  33
  34 /**
  35  * Represents one column inside the DolphinColumnView and has been
  36  * extended to respect view options and hovering information.
  37  */
  38 class ColumnWidget : public QListView
  39 {
  40 public:
  41     ColumnWidget(QWidget* parent,
  42                  DolphinColumnView* columnView,
  43                  const KUrl& url);
  44     virtual ~ColumnWidget();
  45
  46     /** Sets the size of the icons. */
  47     void setDecorationSize(const QSize& size);
  48
  49     /**
  50      * An active column is defined as column, which shows the same URL
  51      * as indicated by the URL navigator. The active column is usually
  52      * drawn in a lighter color. All operations are applied to this column.
  53      */
  54     void setActive(bool active);
  55     inline bool isActive() const;
  56
  57     inline const KUrl& url() const;
  58
  59 protected:
  60     virtual QStyleOptionViewItem viewOptions() const;
  61     virtual void dragEnterEvent(QDragEnterEvent* event);
  62     virtual void dragLeaveEvent(QDragLeaveEvent* event);
  63     virtual void dragMoveEvent(QDragMoveEvent* event);
  64     virtual void dropEvent(QDropEvent* event);
  65     virtual void mousePressEvent(QMouseEvent* event);
  66     virtual void paintEvent(QPaintEvent* event);
  67     virtual void contextMenuEvent(QContextMenuEvent* event);
  68
  69 private:
  70     /** Used by ColumnWidget::setActive(). */
  71     void activate();
  72
  73     /** Used by ColumnWidget::setActive(). */
  74     void deactivate();
  75
  76 private:
  77     bool m_active;
  78     DolphinColumnView* m_view;
  79     KUrl m_url;
  80     QStyleOptionViewItem m_viewOptions;
  81
  82     bool m_dragging;   // TODO: remove this property when the issue #160611 is solved in Qt 4.4
  83     QRect m_dropRect;  // TODO: remove this property when the issue #160611 is solved in Qt 4.4
  84 };
  85
  86 ColumnWidget::ColumnWidget(QWidget* parent,
  87                            DolphinColumnView* columnView,
  88                            const KUrl& url) :
  89     QListView(parent),
  90     m_active(true),
  91     m_view(columnView),
  92     m_url(url),
  93     m_dragging(false),
  94     m_dropRect()
  95 {
  96     setAcceptDrops(true);
  97     setDragDropMode(QAbstractItemView::DragDrop);
  98     setDropIndicatorShown(false);
  99
 100     setMouseTracking(true);
 101     viewport()->setAttribute(Qt::WA_Hover);
 102
 103     // apply the column mode settings to the widget
 104     const ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 105     Q_ASSERT(settings != 0);
 106
 107     m_viewOptions = QListView::viewOptions();
 108
 109     QFont font(settings->fontFamily(), settings->fontSize());
 110     font.setItalic(settings->italicFont());
 111     font.setBold(settings->boldFont());
 112     m_viewOptions.font = font;
 113
 114     const int iconSize = settings->iconSize();
 115     m_viewOptions.decorationSize = QSize(iconSize, iconSize);
 116
 117     activate();
 118 }
 119
 120 ColumnWidget::~ColumnWidget()
 121 {
 122 }
 123
 124 void ColumnWidget::setDecorationSize(const QSize& size)
 125 {
 126     m_viewOptions.decorationSize = size;
 127     doItemsLayout();
 128 }
 129
 130 void ColumnWidget::setActive(bool active)
 131 {
 132     if (m_active == active) {
 133         return;
 134     }
 135
 136     m_active = active;
 137
 138     if (active) {
 139         activate();
 140     } else {
 141         deactivate();
 142     }
 143 }
 144
 145 inline bool ColumnWidget::isActive() const
 146 {
 147     return m_active;
 148 }
 149
 150 const KUrl& ColumnWidget::url() const
 151 {
 152     return m_url;
 153 }
 154
 155 QStyleOptionViewItem ColumnWidget::viewOptions() const
 156 {
 157     return m_viewOptions;
 158 }
 159
 160 void ColumnWidget::dragEnterEvent(QDragEnterEvent* event)
 161 {
 162     if (event->mimeData()->hasUrls()) {
 163         event->acceptProposedAction();
 164     }
 165
 166     m_dragging = true;
 167 }
 168
 169 void ColumnWidget::dragLeaveEvent(QDragLeaveEvent* event)
 170 {
 171     QListView::dragLeaveEvent(event);
 172
 173     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 174     m_dragging = false;
 175     setDirtyRegion(m_dropRect);
 176 }
 177
 178 void ColumnWidget::dragMoveEvent(QDragMoveEvent* event)
 179 {
 180     QListView::dragMoveEvent(event);
 181
 182    // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 183     const QModelIndex index = indexAt(event->pos());
 184     setDirtyRegion(m_dropRect);
 185     m_dropRect = visualRect(index);
 186     setDirtyRegion(m_dropRect);
 187 }
 188
 189 void ColumnWidget::dropEvent(QDropEvent* event)
 190 {
 191     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 192     if (!urls.isEmpty()) {
 193         event->acceptProposedAction();
 194         m_view->m_controller->indicateDroppedUrls(urls,
 195                                                   indexAt(event->pos()),
 196                                                   event->source());
 197     }
 198     QListView::dropEvent(event);
 199     m_dragging = false;
 200 }
 201
 202 void ColumnWidget::mousePressEvent(QMouseEvent* event)
 203 {
 204     QListView::mousePressEvent(event);
 205     const QModelIndex index = indexAt(event->pos());
 206
 207     bool requestActivation = false;
 208     if (index.isValid()) {
 209         // A click on an item has been done. Only request an activation
 210         // if the item is not a directory.
 211         const QAbstractProxyModel* proxyModel = static_cast<const QAbstractProxyModel*>(m_view->model());
 212         const KDirModel* dirModel = static_cast<const KDirModel*>(proxyModel->sourceModel());
 213         const QModelIndex dirIndex = proxyModel->mapToSource(index);
 214         KFileItem* item = dirModel->itemForIndex(dirIndex);
 215         requestActivation = (item != 0) && !item->isDir();
 216     } else {
 217         // a click on the viewport has been done
 218         requestActivation = true;
 219     }
 220
 221     if (requestActivation) {
 222         m_view->requestActivation(this);
 223     } else {
 224         m_view->updateSelections();
 225     }
 226 }
 227
 228 void ColumnWidget::paintEvent(QPaintEvent* event)
 229 {
 230     QListView::paintEvent(event);
 231
 232     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 233     if (m_dragging) {
 234         const QBrush& brush = m_viewOptions.palette.brush(QPalette::Normal, QPalette::Highlight);
 235         DolphinController::drawHoverIndication(viewport(), m_dropRect, brush);
 236     }
 237 }
 238
 239 void ColumnWidget::contextMenuEvent(QContextMenuEvent* event)
 240 {
 241     m_view->requestActivation(this);
 242
 243     QListView::contextMenuEvent(event);
 244
 245     const QModelIndex index = indexAt(event->pos());
 246     if (index.isValid() || m_active) {
 247         // Only open a context menu above an item or if the mouse is above
 248         // the active column.
 249         const QPoint pos = m_view->viewport()->mapFromGlobal(event->globalPos());
 250         m_view->m_controller->triggerContextMenuRequest(pos);
 251     }
 252 }
 253
 254 void ColumnWidget::activate()
 255 {
 256     const QColor bgColor = KColorScheme(KColorScheme::View).background();
 257     QPalette palette = viewport()->palette();
 258     palette.setColor(viewport()->backgroundRole(), bgColor);
 259     viewport()->setPalette(palette);
 260
 261     setSelectionMode(MultiSelection);
 262     update();
 263 }
 264
 265 void ColumnWidget::deactivate()
 266 {
 267     QColor bgColor = KColorScheme(KColorScheme::View).background();
 268     const QColor fgColor = KColorScheme(KColorScheme::View).foreground();
 269     bgColor = KColorUtils::mix(bgColor, fgColor, 0.04);
 270
 271     QPalette palette = viewport()->palette();
 272     palette.setColor(viewport()->backgroundRole(), bgColor);
 273     viewport()->setPalette(palette);
 274
 275     setSelectionMode(SingleSelection);
 276     update();
 277 }
 278
 279 // ---
 280
 281 DolphinColumnView::DolphinColumnView(QWidget* parent, DolphinController* controller) :
 282     QColumnView(parent),
 283     m_controller(controller)
 284 {
 285     Q_ASSERT(controller != 0);
 286
 287     setAcceptDrops(true);
 288     setDragDropMode(QAbstractItemView::DragDrop);
 289     setDropIndicatorShown(false);
 290     setSelectionMode(MultiSelection);
 291
 292     if (KGlobalSettings::singleClick()) {
 293         connect(this, SIGNAL(clicked(const QModelIndex&)),
 294                 this, SLOT(triggerItem(const QModelIndex&)));
 295     } else {
 296         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 297                 this, SLOT(triggerItem(const QModelIndex&)));
 298     }
 299     connect(this, SIGNAL(entered(const QModelIndex&)),
 300             controller, SLOT(emitItemEntered(const QModelIndex&)));
 301     connect(this, SIGNAL(viewportEntered()),
 302             controller, SLOT(emitViewportEntered()));
 303     connect(controller, SIGNAL(zoomIn()),
 304             this, SLOT(zoomIn()));
 305     connect(controller, SIGNAL(zoomOut()),
 306             this, SLOT(zoomOut()));
 307     connect(controller, SIGNAL(urlChanged(const KUrl&)),
 308             this, SLOT(updateColumnsState(const KUrl&)));
 309
 310     updateDecorationSize();
 311 }
 312
 313 DolphinColumnView::~DolphinColumnView()
 314 {
 315 }
 316
 317 QAbstractItemView* DolphinColumnView::createColumn(const QModelIndex& index)
 318 {
 319     // let the column widget be aware about its URL...
 320     KUrl columnUrl;
 321     if (viewport()->children().count() == 0) {
 322         // For the first column widget the directory lister has not been started
 323         // yet, hence use the URL from the controller instead.
 324         columnUrl = m_controller->url();
 325     } else {
 326         const QAbstractProxyModel* proxyModel = static_cast<const QAbstractProxyModel*>(model());
 327         const KDirModel* dirModel = static_cast<const KDirModel*>(proxyModel->sourceModel());
 328
 329         const QModelIndex dirModelIndex = proxyModel->mapToSource(index);
 330         KFileItem* fileItem = dirModel->itemForIndex(dirModelIndex);
 331         if (fileItem != 0) {
 332             columnUrl = fileItem->url();
 333         }
 334     }
 335
 336     ColumnWidget* view = new ColumnWidget(viewport(), this, columnUrl);
 337
 338     // The following code has been copied 1:1 from QColumnView::createColumn().
 339     // Copyright (C) 1992-2007 Trolltech ASA. In Qt 4.4 the new method
 340     // QColumnView::initializeColumn() will be available for this.
 341
 342     view->setFrameShape(QFrame::NoFrame);
 343     view->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 344     view->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
 345     view->setMinimumWidth(100);
 346     view->setAttribute(Qt::WA_MacShowFocusRect, false);
 347
 348     // copy the 'view' behavior
 349     view->setDragDropMode(dragDropMode());
 350     view->setDragDropOverwriteMode(dragDropOverwriteMode());
 351     view->setDropIndicatorShown(showDropIndicator());
 352     view->setAlternatingRowColors(alternatingRowColors());
 353     view->setAutoScroll(hasAutoScroll());
 354     view->setEditTriggers(editTriggers());
 355     view->setHorizontalScrollMode(horizontalScrollMode());
 356     view->setIconSize(iconSize());
 357     view->setSelectionBehavior(selectionBehavior());
 358     view->setSelectionMode(selectionMode());
 359     view->setTabKeyNavigation(tabKeyNavigation());
 360     view->setTextElideMode(textElideMode());
 361     view->setVerticalScrollMode(verticalScrollMode());
 362
 363     view->setModel(model());
 364
 365     // set the delegate to be the columnview delegate
 366     QAbstractItemDelegate* delegate = view->itemDelegate();
 367     view->setItemDelegate(itemDelegate());
 368     delete delegate;
 369
 370     view->setRootIndex(index);
 371
 372     if (model()->canFetchMore(index)) {
 373         model()->fetchMore(index);
 374     }
 375
 376     return view;
 377 }
 378
 379 void DolphinColumnView::mousePressEvent(QMouseEvent* event)
 380 {
 381     m_controller->triggerActivation();
 382     QColumnView::mousePressEvent(event);
 383 }
 384
 385 void DolphinColumnView::dragEnterEvent(QDragEnterEvent* event)
 386 {
 387     if (event->mimeData()->hasUrls()) {
 388         event->acceptProposedAction();
 389     }
 390 }
 391
 392 void DolphinColumnView::dropEvent(QDropEvent* event)
 393 {
 394     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 395     if (!urls.isEmpty()) {
 396         m_controller->indicateDroppedUrls(urls,
 397                                           indexAt(event->pos()),
 398                                           event->source());
 399         event->acceptProposedAction();
 400     }
 401     QColumnView::dropEvent(event);
 402 }
 403
 404 void DolphinColumnView::zoomIn()
 405 {
 406     if (isZoomInPossible()) {
 407         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 408         // TODO: get rid of K3Icon sizes
 409         switch (settings->iconSize()) {
 410         case K3Icon::SizeSmall:  settings->setIconSize(K3Icon::SizeMedium); break;
 411         case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeLarge); break;
 412         default: Q_ASSERT(false); break;
 413         }
 414         updateDecorationSize();
 415     }
 416 }
 417
 418 void DolphinColumnView::zoomOut()
 419 {
 420     if (isZoomOutPossible()) {
 421         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 422         // TODO: get rid of K3Icon sizes
 423         switch (settings->iconSize()) {
 424         case K3Icon::SizeLarge:  settings->setIconSize(K3Icon::SizeMedium); break;
 425         case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeSmall); break;
 426         default: Q_ASSERT(false); break;
 427         }
 428         updateDecorationSize();
 429     }
 430 }
 431
 432 void DolphinColumnView::triggerItem(const QModelIndex& index)
 433 {
 434     m_controller->triggerItem(index);
 435     updateColumnsState(m_controller->url());
 436 }
 437
 438 void DolphinColumnView::updateColumnsState(const KUrl& url)
 439 {
 440     foreach (QObject* object, viewport()->children()) {
 441         if (object->inherits("QListView")) {
 442             ColumnWidget* widget = static_cast<ColumnWidget*>(object);
 443             widget->setActive(widget->url() == url);
 444         }
 445     }
 446 }
 447
 448 bool DolphinColumnView::isZoomInPossible() const
 449 {
 450     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 451     return settings->iconSize() < K3Icon::SizeLarge;
 452 }
 453
 454 bool DolphinColumnView::isZoomOutPossible() const
 455 {
 456     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 457     return settings->iconSize() > K3Icon::SizeSmall;
 458 }
 459
 460 void DolphinColumnView::requestActivation(QWidget* column)
 461 {
 462     foreach (QObject* object, viewport()->children()) {
 463         if (object->inherits("QListView")) {
 464             ColumnWidget* widget = static_cast<ColumnWidget*>(object);
 465             const bool isActive = (widget == column);
 466             widget->setActive(isActive);
 467             if (isActive) {
 468                 m_controller->setUrl(widget->url());
 469             }
 470        }
 471     }
 472     updateSelections();
 473 }
 474
 475 void DolphinColumnView::updateSelections()
 476 {
 477     ColumnWidget* previousWidget = 0;
 478     foreach (QObject* object, viewport()->children()) {
 479         if (object->inherits("QListView")) {
 480             ColumnWidget* widget = static_cast<ColumnWidget*>(object);
 481             if (previousWidget != 0) {
 482                 const QAbstractProxyModel* proxyModel = static_cast<const QAbstractProxyModel*>(model());
 483                 const KDirModel* dirModel = static_cast<const KDirModel*>(proxyModel->sourceModel());
 484                 const QModelIndex dirIndex = dirModel->indexForUrl(widget->url());
 485                 const QModelIndex proxyIndex = proxyModel->mapFromSource(dirIndex);
 486
 487                 QItemSelectionModel* selModel = previousWidget->selectionModel();
 488                 const QItemSelection selection = selModel->selection();
 489                 const bool isIndexSelected = selModel->isSelected(proxyIndex);
 490
 491                 const bool clearSelection = !previousWidget->isActive() &&
 492                                             ((selection.count() > 1) || !isIndexSelected);
 493                 if (clearSelection) {
 494                     selModel->clear();
 495                 }
 496                 if (!isIndexSelected) {
 497                     selModel->select(proxyIndex, QItemSelectionModel::Select);
 498                 }
 499             }
 500
 501             previousWidget = widget;
 502        }
 503     }
 504 }
 505
 506 void DolphinColumnView::updateDecorationSize()
 507 {
 508     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 509     const int iconSize = settings->iconSize();
 510
 511     foreach (QObject* object, viewport()->children()) {
 512         if (object->inherits("QListView")) {
 513             ColumnWidget* widget = static_cast<ColumnWidget*>(object);
 514             widget->setDecorationSize(QSize(iconSize, iconSize));
 515         }
 516     }
 517
 518     m_controller->setZoomInPossible(isZoomInPossible());
 519     m_controller->setZoomOutPossible(isZoomOutPossible());
 520
 521     doItemsLayout();
 522 }
 523
 524 #include "dolphincolumnview.moc"