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 <kdirlister.h>
  30 #include <kdirmodel.h>
  31
  32 #include <QAbstractProxyModel>
  33 #include <QPoint>
  34
  35 /**
  36  * Represents one column inside the DolphinColumnView and has been
  37  * extended to respect view options and hovering information.
  38  */
  39 class ColumnWidget : public QListView
  40 {
  41 public:
  42     ColumnWidget(QWidget* parent,
  43                  DolphinColumnView* columnView,
  44                  const KUrl& url);
  45     virtual ~ColumnWidget();
  46
  47     /** Sets the size of the icons. */
  48     void setDecorationSize(const QSize& size);
  49
  50     /**
  51      * An active column is defined as column, which shows the same URL
  52      * as indicated by the URL navigator. The active column is usually
  53      * drawn in a lighter color. All operations are applied to this column.
  54      */
  55     void setActive(bool active);
  56     inline bool isActive() const;
  57
  58     inline const KUrl& url() const;
  59
  60 protected:
  61     virtual QStyleOptionViewItem viewOptions() const;
  62     virtual void dragEnterEvent(QDragEnterEvent* event);
  63     virtual void dragLeaveEvent(QDragLeaveEvent* event);
  64     virtual void dragMoveEvent(QDragMoveEvent* event);
  65     virtual void dropEvent(QDropEvent* event);
  66     virtual void mousePressEvent(QMouseEvent* event);
  67     virtual void mouseMoveEvent(QMouseEvent* event);
  68     virtual void mouseReleaseEvent(QMouseEvent* event);
  69     virtual void paintEvent(QPaintEvent* event);
  70     virtual void contextMenuEvent(QContextMenuEvent* event);
  71
  72 private:
  73     /** Used by ColumnWidget::setActive(). */
  74     void activate();
  75
  76     /** Used by ColumnWidget::setActive(). */
  77     void deactivate();
  78
  79 private:
  80     bool m_active;
  81     bool m_swallowMouseMoveEvents;
  82     DolphinColumnView* m_view;
  83     KUrl m_url;
  84     KUrl m_childUrl; // URL of the next column that is shown
  85     QStyleOptionViewItem m_viewOptions;
  86
  87     bool m_dragging;   // TODO: remove this property when the issue #160611 is solved in Qt 4.4
  88     QRect m_dropRect;  // TODO: remove this property when the issue #160611 is solved in Qt 4.4
  89 };
  90
  91 ColumnWidget::ColumnWidget(QWidget* parent,
  92                            DolphinColumnView* columnView,
  93                            const KUrl& url) :
  94     QListView(parent),
  95     m_active(true),
  96     m_swallowMouseMoveEvents(false),
  97     m_view(columnView),
  98     m_url(url),
  99     m_childUrl(),
 100     m_dragging(false),
 101     m_dropRect()
 102 {
 103     setMouseTracking(true);
 104     viewport()->setAttribute(Qt::WA_Hover);
 105
 106     // apply the column mode settings to the widget
 107     const ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 108     Q_ASSERT(settings != 0);
 109
 110     m_viewOptions = QListView::viewOptions();
 111
 112     QFont font(settings->fontFamily(), settings->fontSize());
 113     font.setItalic(settings->italicFont());
 114     font.setBold(settings->boldFont());
 115     m_viewOptions.font = font;
 116
 117     const int iconSize = settings->iconSize();
 118     m_viewOptions.decorationSize = QSize(iconSize, iconSize);
 119
 120     activate();
 121 }
 122
 123 ColumnWidget::~ColumnWidget()
 124 {
 125 }
 126
 127 void ColumnWidget::setDecorationSize(const QSize& size)
 128 {
 129     m_viewOptions.decorationSize = size;
 130     doItemsLayout();
 131 }
 132
 133 void ColumnWidget::setActive(bool active)
 134 {
 135     if (m_active == active) {
 136         return;
 137     }
 138
 139     m_active = active;
 140
 141     if (active) {
 142         activate();
 143     } else {
 144         deactivate();
 145     }
 146 }
 147
 148 inline bool ColumnWidget::isActive() const
 149 {
 150     return m_active;
 151 }
 152
 153 const KUrl& ColumnWidget::url() const
 154 {
 155     return m_url;
 156 }
 157
 158 QStyleOptionViewItem ColumnWidget::viewOptions() const
 159 {
 160     return m_viewOptions;
 161 }
 162
 163 void ColumnWidget::dragEnterEvent(QDragEnterEvent* event)
 164 {
 165     if (event->mimeData()->hasUrls()) {
 166         event->acceptProposedAction();
 167     }
 168
 169     m_dragging = true;
 170 }
 171
 172 void ColumnWidget::dragLeaveEvent(QDragLeaveEvent* event)
 173 {
 174     QListView::dragLeaveEvent(event);
 175
 176     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 177     m_dragging = false;
 178     setDirtyRegion(m_dropRect);
 179 }
 180
 181 void ColumnWidget::dragMoveEvent(QDragMoveEvent* event)
 182 {
 183     QListView::dragMoveEvent(event);
 184
 185     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 186     const QModelIndex index = indexAt(event->pos());
 187     setDirtyRegion(m_dropRect);
 188     m_dropRect = visualRect(index);
 189     setDirtyRegion(m_dropRect);
 190 }
 191
 192 void ColumnWidget::dropEvent(QDropEvent* event)
 193 {
 194     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 195     if (!urls.isEmpty()) {
 196         event->acceptProposedAction();
 197         m_view->m_controller->indicateDroppedUrls(urls,
 198                                                   indexAt(event->pos()),
 199                                                   event->source());
 200     }
 201     QListView::dropEvent(event);
 202     m_dragging = false;
 203 }
 204
 205 void ColumnWidget::mousePressEvent(QMouseEvent* event)
 206 {
 207     QListView::mousePressEvent(event);
 208
 209     bool requestActivation = false;
 210     const QModelIndex index = indexAt(event->pos());
 211     if (index.isValid()) {
 212         // A click on an item has been done. Only request an activation
 213         // if the item is not a directory.
 214         const QAbstractProxyModel* proxyModel = static_cast<const QAbstractProxyModel*>(m_view->model());
 215         const KDirModel* dirModel = static_cast<const KDirModel*>(proxyModel->sourceModel());
 216         const QModelIndex dirIndex = proxyModel->mapToSource(index);
 217         KFileItem* item = dirModel->itemForIndex(dirIndex);
 218         if (item != 0) {
 219             if (item->isDir()) {
 220                 m_childUrl = item->url();
 221            } else {
 222                 requestActivation = true;
 223             }
 224         }
 225     } else {
 226         // a click on the viewport has been done
 227         requestActivation = true;
 228
 229         // Swallow mouse move events if a click is done on the viewport. Otherwise the QColumnView
 230         // triggers an unwanted loading of directories on hovering folder items.
 231         m_swallowMouseMoveEvents = true;
 232     }
 233
 234     if (requestActivation) {
 235         m_view->requestActivation(this);
 236     }
 237 }
 238
 239 void ColumnWidget::mouseMoveEvent(QMouseEvent* event)
 240 {
 241     // see description in ColumnView::mousePressEvent()
 242     if (!m_swallowMouseMoveEvents) {
 243         QListView::mouseMoveEvent(event);
 244     }
 245 }
 246
 247 void ColumnWidget::mouseReleaseEvent(QMouseEvent* event)
 248 {
 249     QListView::mouseReleaseEvent(event);
 250     m_swallowMouseMoveEvents = false;
 251 }
 252
 253
 254 void ColumnWidget::paintEvent(QPaintEvent* event)
 255 {
 256     // indicate the shown URL of the next column by highlighting the shown folder item
 257     const QAbstractProxyModel* proxyModel = static_cast<const QAbstractProxyModel*>(m_view->model());
 258     const KDirModel* dirModel = static_cast<const KDirModel*>(proxyModel->sourceModel());
 259     const QModelIndex dirIndex = dirModel->indexForUrl(m_childUrl);
 260     const QModelIndex proxyIndex = proxyModel->mapFromSource(dirIndex);
 261     if (proxyIndex.isValid()) {
 262         const QRect itemRect = visualRect(proxyIndex);
 263         QPainter painter(viewport());
 264         painter.save();
 265
 266         QColor color = KColorScheme(KColorScheme::View).foreground();
 267         color.setAlpha(32);
 268         painter.setPen(Qt::NoPen);
 269         painter.setBrush(color);
 270         painter.drawRect(itemRect);
 271
 272         painter.restore();
 273     }
 274
 275     QListView::paintEvent(event);
 276
 277     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 278     if (m_dragging) {
 279         const QBrush& brush = m_viewOptions.palette.brush(QPalette::Normal, QPalette::Highlight);
 280         DolphinController::drawHoverIndication(viewport(), m_dropRect, brush);
 281     }
 282 }
 283
 284 void ColumnWidget::contextMenuEvent(QContextMenuEvent* event)
 285 {
 286     if (!m_active) {
 287         m_view->requestActivation(this);
 288     }
 289
 290     QListView::contextMenuEvent(event);
 291
 292     const QModelIndex index = indexAt(event->pos());
 293     if (index.isValid() || m_active) {
 294         // Only open a context menu above an item or if the mouse is above
 295         // the active column.
 296         const QPoint pos = m_view->viewport()->mapFromGlobal(event->globalPos());
 297         m_view->m_controller->triggerContextMenuRequest(pos);
 298     }
 299 }
 300
 301 void ColumnWidget::activate()
 302 {
 303     const QColor bgColor = KColorScheme(KColorScheme::View).background();
 304     QPalette palette = viewport()->palette();
 305     palette.setColor(viewport()->backgroundRole(), bgColor);
 306     viewport()->setPalette(palette);
 307
 308     update();
 309 }
 310
 311 void ColumnWidget::deactivate()
 312 {
 313     QColor bgColor = KColorScheme(KColorScheme::View).background();
 314     const QColor fgColor = KColorScheme(KColorScheme::View).foreground();
 315     bgColor = KColorUtils::mix(bgColor, fgColor, 0.04);
 316
 317     QPalette palette = viewport()->palette();
 318     palette.setColor(viewport()->backgroundRole(), bgColor);
 319     viewport()->setPalette(palette);
 320
 321     update();
 322 }
 323
 324 // ---
 325
 326 DolphinColumnView::DolphinColumnView(QWidget* parent, DolphinController* controller) :
 327     QColumnView(parent),
 328     m_controller(controller)
 329 {
 330     Q_ASSERT(controller != 0);
 331
 332     setAcceptDrops(true);
 333     setDragDropMode(QAbstractItemView::DragDrop);
 334     setDropIndicatorShown(false);
 335
 336     if (KGlobalSettings::singleClick()) {
 337         connect(this, SIGNAL(clicked(const QModelIndex&)),
 338                 this, SLOT(triggerItem(const QModelIndex&)));
 339     } else {
 340         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 341                 this, SLOT(triggerItem(const QModelIndex&)));
 342     }
 343     connect(this, SIGNAL(entered(const QModelIndex&)),
 344             controller, SLOT(emitItemEntered(const QModelIndex&)));
 345     connect(this, SIGNAL(viewportEntered()),
 346             controller, SLOT(emitViewportEntered()));
 347     connect(controller, SIGNAL(zoomIn()),
 348             this, SLOT(zoomIn()));
 349     connect(controller, SIGNAL(zoomOut()),
 350             this, SLOT(zoomOut()));
 351     connect(controller, SIGNAL(urlChanged(const KUrl&)),
 352             this, SLOT(updateColumnsState(const KUrl&)));
 353
 354     updateDecorationSize();
 355 }
 356
 357 DolphinColumnView::~DolphinColumnView()
 358 {
 359 }
 360
 361 QAbstractItemView* DolphinColumnView::createColumn(const QModelIndex& index)
 362 {
 363     // let the column widget be aware about its URL...
 364     KUrl columnUrl;
 365     if (viewport()->children().count() == 0) {
 366         // For the first column widget the directory lister has not been started
 367         // yet, hence use the URL from the controller instead.
 368         columnUrl = m_controller->url();
 369     } else {
 370         const QAbstractProxyModel* proxyModel = static_cast<const QAbstractProxyModel*>(model());
 371         const KDirModel* dirModel = static_cast<const KDirModel*>(proxyModel->sourceModel());
 372
 373         const QModelIndex dirModelIndex = proxyModel->mapToSource(index);
 374         KFileItem* fileItem = dirModel->itemForIndex(dirModelIndex);
 375         if (fileItem != 0) {
 376             columnUrl = fileItem->url();
 377         }
 378     }
 379
 380     ColumnWidget* view = new ColumnWidget(viewport(), this, columnUrl);
 381
 382     // The following code has been copied 1:1 from QColumnView::createColumn().
 383     // Copyright (C) 1992-2007 Trolltech ASA. In Qt 4.4 the new method
 384     // QColumnView::initializeColumn() will be available for this.
 385
 386     view->setFrameShape(QFrame::NoFrame);
 387     view->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 388     view->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
 389     view->setMinimumWidth(100);
 390     view->setAttribute(Qt::WA_MacShowFocusRect, false);
 391
 392     // copy the 'view' behavior
 393     view->setDragDropMode(dragDropMode());
 394     view->setDragDropOverwriteMode(dragDropOverwriteMode());
 395     view->setDropIndicatorShown(showDropIndicator());
 396     view->setAlternatingRowColors(alternatingRowColors());
 397     view->setAutoScroll(hasAutoScroll());
 398     view->setEditTriggers(editTriggers());
 399     view->setHorizontalScrollMode(horizontalScrollMode());
 400     view->setIconSize(iconSize());
 401     view->setSelectionBehavior(selectionBehavior());
 402     view->setSelectionMode(selectionMode());
 403     view->setTabKeyNavigation(tabKeyNavigation());
 404     view->setTextElideMode(textElideMode());
 405     view->setVerticalScrollMode(verticalScrollMode());
 406
 407     view->setModel(model());
 408
 409     // set the delegate to be the columnview delegate
 410     QAbstractItemDelegate* delegate = view->itemDelegate();
 411     view->setItemDelegate(itemDelegate());
 412     delete delegate;
 413
 414     view->setRootIndex(index);
 415
 416     if (model()->canFetchMore(index)) {
 417         model()->fetchMore(index);
 418     }
 419
 420     return view;
 421 }
 422
 423 void DolphinColumnView::mousePressEvent(QMouseEvent* event)
 424 {
 425     m_controller->triggerActivation();
 426     QColumnView::mousePressEvent(event);
 427 }
 428
 429 void DolphinColumnView::dragEnterEvent(QDragEnterEvent* event)
 430 {
 431     if (event->mimeData()->hasUrls()) {
 432         event->acceptProposedAction();
 433     }
 434 }
 435
 436 void DolphinColumnView::dropEvent(QDropEvent* event)
 437 {
 438     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 439     if (!urls.isEmpty()) {
 440         m_controller->indicateDroppedUrls(urls,
 441                                           indexAt(event->pos()),
 442                                           event->source());
 443         event->acceptProposedAction();
 444     }
 445     QColumnView::dropEvent(event);
 446 }
 447
 448 void DolphinColumnView::zoomIn()
 449 {
 450     if (isZoomInPossible()) {
 451         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 452         // TODO: get rid of K3Icon sizes
 453         switch (settings->iconSize()) {
 454         case K3Icon::SizeSmall:  settings->setIconSize(K3Icon::SizeMedium); break;
 455         case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeLarge); break;
 456         default: Q_ASSERT(false); break;
 457         }
 458         updateDecorationSize();
 459     }
 460 }
 461
 462 void DolphinColumnView::zoomOut()
 463 {
 464     if (isZoomOutPossible()) {
 465         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 466         // TODO: get rid of K3Icon sizes
 467         switch (settings->iconSize()) {
 468         case K3Icon::SizeLarge:  settings->setIconSize(K3Icon::SizeMedium); break;
 469         case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeSmall); break;
 470         default: Q_ASSERT(false); break;
 471         }
 472         updateDecorationSize();
 473     }
 474 }
 475
 476 void DolphinColumnView::triggerItem(const QModelIndex& index)
 477 {
 478     m_controller->triggerItem(index);
 479     updateColumnsState(m_controller->url());
 480 }
 481
 482 void DolphinColumnView::updateColumnsState(const KUrl& url)
 483 {
 484     foreach (QObject* object, viewport()->children()) {
 485         if (object->inherits("QListView")) {
 486             ColumnWidget* widget = static_cast<ColumnWidget*>(object);
 487             widget->setActive(widget->url() == url);
 488         }
 489     }
 490 }
 491
 492
 493 void DolphinColumnView::updateDecorationSize()
 494 {
 495     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 496     const int iconSize = settings->iconSize();
 497
 498     foreach (QObject* object, viewport()->children()) {
 499         if (object->inherits("QListView")) {
 500             ColumnWidget* widget = static_cast<ColumnWidget*>(object);
 501             widget->setDecorationSize(QSize(iconSize, iconSize));
 502         }
 503     }
 504
 505     m_controller->setZoomInPossible(isZoomInPossible());
 506     m_controller->setZoomOutPossible(isZoomOutPossible());
 507
 508     doItemsLayout();
 509 }
 510
 511 bool DolphinColumnView::isZoomInPossible() const
 512 {
 513     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 514     return settings->iconSize() < K3Icon::SizeLarge;
 515 }
 516
 517 bool DolphinColumnView::isZoomOutPossible() const
 518 {
 519     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 520     return settings->iconSize() > K3Icon::SizeSmall;
 521 }
 522
 523 void DolphinColumnView::requestActivation(QWidget* column)
 524 {
 525     foreach (QObject* object, viewport()->children()) {
 526         if (object->inherits("QListView")) {
 527             ColumnWidget* widget = static_cast<ColumnWidget*>(object);
 528             const bool isActive = (widget == column);
 529             widget->setActive(isActive);
 530             if (isActive) {
 531                 m_controller->setUrl(widget->url());
 532             }
 533        }
 534     }
 535 }
 536
 537 #include "dolphincolumnview.moc"