src/dolphincolumnview.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  *   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 #include <kfileitem.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
  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     KUrl m_url;
  79     DolphinColumnView* m_columnView;
  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_url(url),
  92     m_columnView(columnView),
  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 const KUrl& ColumnWidget::url() const
 146 {
 147     return m_url;
 148 }
 149
 150 QStyleOptionViewItem ColumnWidget::viewOptions() const
 151 {
 152     return m_viewOptions;
 153 }
 154
 155 void ColumnWidget::dragEnterEvent(QDragEnterEvent* event)
 156 {
 157     if (event->mimeData()->hasUrls()) {
 158         event->acceptProposedAction();
 159     }
 160
 161     m_dragging = true;
 162 }
 163
 164 void ColumnWidget::dragLeaveEvent(QDragLeaveEvent* event)
 165 {
 166     QListView::dragLeaveEvent(event);
 167
 168     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 169     m_dragging = false;
 170     setDirtyRegion(m_dropRect);
 171 }
 172
 173 void ColumnWidget::dragMoveEvent(QDragMoveEvent* event)
 174 {
 175     QListView::dragMoveEvent(event);
 176
 177    // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 178     const QModelIndex index = indexAt(event->pos());
 179     setDirtyRegion(m_dropRect);
 180     m_dropRect = visualRect(index);
 181     setDirtyRegion(m_dropRect);
 182 }
 183
 184 void ColumnWidget::dropEvent(QDropEvent* event)
 185 {
 186     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 187     if (!urls.isEmpty()) {
 188         event->acceptProposedAction();
 189         m_columnView->m_controller->indicateDroppedUrls(urls,
 190                                                         indexAt(event->pos()),
 191                                                         event->source());
 192     }
 193     QListView::dropEvent(event);
 194     m_dragging = false;
 195 }
 196
 197 void ColumnWidget::mousePressEvent(QMouseEvent* event)
 198 {
 199     if (m_active || indexAt(event->pos()).isValid()) {
 200         // Only accept the mouse press event in inactive views,
 201         // if a click is done on an item. This assures that
 202         // the current selection, which usually shows the
 203         // the directory for next column, won't get deleted.
 204         QListView::mousePressEvent(event);
 205     }
 206 }
 207
 208 void ColumnWidget::paintEvent(QPaintEvent* event)
 209 {
 210     QListView::paintEvent(event);
 211
 212     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 213     if (m_dragging) {
 214         const QBrush& brush = m_viewOptions.palette.brush(QPalette::Normal, QPalette::Highlight);
 215         DolphinController::drawHoverIndication(viewport(), m_dropRect, brush);
 216     }
 217 }
 218
 219 void ColumnWidget::contextMenuEvent(QContextMenuEvent* event)
 220 {
 221     QListView::contextMenuEvent(event);
 222     m_columnView->m_controller->triggerContextMenuRequest(event->pos(), m_url);
 223 }
 224
 225 void ColumnWidget::activate()
 226 {
 227     const QColor bgColor = KColorScheme(KColorScheme::View).background();
 228     QPalette palette = viewport()->palette();
 229     palette.setColor(viewport()->backgroundRole(), bgColor);
 230     viewport()->setPalette(palette);
 231
 232     setSelectionMode(MultiSelection);
 233 }
 234
 235 void ColumnWidget::deactivate()
 236 {
 237     QColor bgColor = KColorScheme(KColorScheme::View).background();
 238     const QColor fgColor = KColorScheme(KColorScheme::View).foreground();
 239     bgColor = KColorUtils::mix(bgColor, fgColor, 0.04);
 240
 241     QPalette palette = viewport()->palette();
 242     palette.setColor(viewport()->backgroundRole(), bgColor);
 243     viewport()->setPalette(palette);
 244
 245     setSelectionMode(SingleSelection);
 246 }
 247
 248 // ---
 249
 250 DolphinColumnView::DolphinColumnView(QWidget* parent, DolphinController* controller) :
 251     QColumnView(parent),
 252     m_controller(controller)
 253 {
 254     Q_ASSERT(controller != 0);
 255
 256     setAcceptDrops(true);
 257     setSelectionBehavior(SelectItems);
 258     setDragDropMode(QAbstractItemView::DragDrop);
 259     setDropIndicatorShown(false);
 260
 261     if (KGlobalSettings::singleClick()) {
 262         connect(this, SIGNAL(clicked(const QModelIndex&)),
 263                 this, SLOT(triggerItem(const QModelIndex&)));
 264     } else {
 265         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 266                 this, SLOT(triggerItem(const QModelIndex&)));
 267     }
 268     connect(this, SIGNAL(activated(const QModelIndex&)),
 269             this, SLOT(triggerItem(const QModelIndex&)));
 270     connect(this, SIGNAL(entered(const QModelIndex&)),
 271             controller, SLOT(emitItemEntered(const QModelIndex&)));
 272     connect(this, SIGNAL(viewportEntered()),
 273             controller, SLOT(emitViewportEntered()));
 274     connect(controller, SIGNAL(zoomIn()),
 275             this, SLOT(zoomIn()));
 276     connect(controller, SIGNAL(zoomOut()),
 277             this, SLOT(zoomOut()));
 278
 279     updateDecorationSize();
 280 }
 281
 282 DolphinColumnView::~DolphinColumnView()
 283 {
 284 }
 285
 286 QAbstractItemView* DolphinColumnView::createColumn(const QModelIndex& index)
 287 {
 288     // To be able to visually indicate whether a column is active (which means
 289     // that it represents the content of the URL navigator), the column
 290     // must remember its URL.
 291     const QAbstractProxyModel* proxyModel = static_cast<const QAbstractProxyModel*>(model());
 292     const KDirModel* dirModel = static_cast<const KDirModel*>(proxyModel->sourceModel());
 293
 294     const QModelIndex dirModelIndex = proxyModel->mapToSource(index);
 295     KFileItem* fileItem = dirModel->itemForIndex(dirModelIndex);
 296
 297     KUrl columnUrl;
 298     if (fileItem != 0) {
 299         columnUrl = fileItem->url();
 300     }
 301
 302     ColumnWidget* view = new ColumnWidget(viewport(),
 303                                           this,
 304                                           columnUrl);
 305
 306     // The following code has been copied 1:1 from QColumnView::createColumn().
 307     // Copyright (C) 1992-2007 Trolltech ASA.
 308     // It would be nice if QColumnView would offer a protected method for this
 309     // (already send input to Benjamin, hopefully possible in Qt4.4)
 310
 311     view->setFrameShape(QFrame::NoFrame);
 312     view->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 313     view->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
 314     view->setMinimumWidth(100);
 315     view->setAttribute(Qt::WA_MacShowFocusRect, false);
 316
 317     // copy the 'view' behavior
 318     view->setDragDropMode(dragDropMode());
 319     view->setDragDropOverwriteMode(dragDropOverwriteMode());
 320     view->setDropIndicatorShown(showDropIndicator());
 321     view->setAlternatingRowColors(alternatingRowColors());
 322     view->setAutoScroll(hasAutoScroll());
 323     view->setEditTriggers(editTriggers());
 324     view->setHorizontalScrollMode(horizontalScrollMode());
 325     view->setIconSize(iconSize());
 326     view->setSelectionBehavior(selectionBehavior());
 327     view->setSelectionMode(selectionMode());
 328     view->setTabKeyNavigation(tabKeyNavigation());
 329     view->setTextElideMode(textElideMode());
 330     view->setVerticalScrollMode(verticalScrollMode());
 331
 332     view->setModel(model());
 333
 334     // set the delegate to be the columnview delegate
 335     QAbstractItemDelegate* delegate = view->itemDelegate();
 336     view->setItemDelegate(itemDelegate());
 337     delete delegate;
 338
 339     view->setRootIndex(index);
 340
 341     if (model()->canFetchMore(index)) {
 342         model()->fetchMore(index);
 343     }
 344
 345     return view;
 346 }
 347
 348 void DolphinColumnView::mousePressEvent(QMouseEvent* event)
 349 {
 350     m_controller->triggerActivation();
 351     QColumnView::mousePressEvent(event);
 352 }
 353
 354 void DolphinColumnView::dragEnterEvent(QDragEnterEvent* event)
 355 {
 356     if (event->mimeData()->hasUrls()) {
 357         event->acceptProposedAction();
 358     }
 359 }
 360
 361 void DolphinColumnView::dropEvent(QDropEvent* event)
 362 {
 363     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 364     if (!urls.isEmpty()) {
 365         m_controller->indicateDroppedUrls(urls,
 366                                           indexAt(event->pos()),
 367                                           event->source());
 368         event->acceptProposedAction();
 369     }
 370     QColumnView::dropEvent(event);
 371 }
 372
 373 void DolphinColumnView::zoomIn()
 374 {
 375     if (isZoomInPossible()) {
 376         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 377         // TODO: get rid of K3Icon sizes
 378         switch (settings->iconSize()) {
 379         case K3Icon::SizeSmall:  settings->setIconSize(K3Icon::SizeMedium); break;
 380         case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeLarge); break;
 381         default: Q_ASSERT(false); break;
 382         }
 383         updateDecorationSize();
 384     }
 385 }
 386
 387 void DolphinColumnView::zoomOut()
 388 {
 389     if (isZoomOutPossible()) {
 390         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 391         // TODO: get rid of K3Icon sizes
 392         switch (settings->iconSize()) {
 393         case K3Icon::SizeLarge:  settings->setIconSize(K3Icon::SizeMedium); break;
 394         case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeSmall); break;
 395         default: Q_ASSERT(false); break;
 396         }
 397         updateDecorationSize();
 398     }
 399 }
 400
 401 void DolphinColumnView::triggerItem(const QModelIndex& index)
 402 {
 403     m_controller->triggerItem(index);
 404
 405     // Update the activation state of all columns. Only the column
 406     // which represents the URL of the URL navigator is marked as active.
 407     const KUrl& navigatorUrl = m_controller->url();
 408     foreach (QObject* object, viewport()->children()) {
 409         if (object->inherits("QListView")) {
 410             ColumnWidget* widget = static_cast<ColumnWidget*>(object);
 411             widget->setActive(navigatorUrl == widget->url());
 412         }
 413     }
 414 }
 415
 416 bool DolphinColumnView::isZoomInPossible() const
 417 {
 418     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 419     return settings->iconSize() < K3Icon::SizeLarge;
 420 }
 421
 422 bool DolphinColumnView::isZoomOutPossible() const
 423 {
 424     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 425     return settings->iconSize() > K3Icon::SizeSmall;
 426 }
 427
 428 void DolphinColumnView::updateDecorationSize()
 429 {
 430     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 431     const int iconSize = settings->iconSize();
 432
 433     foreach (QObject* object, viewport()->children()) {
 434         if (object->inherits("QListView")) {
 435             ColumnWidget* widget = static_cast<ColumnWidget*>(object);
 436             widget->setDecorationSize(QSize(iconSize, iconSize));
 437         }
 438     }
 439
 440     m_controller->setZoomInPossible(isZoomInPossible());
 441     m_controller->setZoomOutPossible(isZoomOutPossible());
 442
 443     doItemsLayout();
 444 }
 445
 446 #include "dolphincolumnview.moc"