src/dolphiniconsview.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 "dolphiniconsview.h"
  21
  22 #include "dolphincategorydrawer.h"
  23 #include "dolphincontroller.h"
  24 #include "dolphinsettings.h"
  25
  26 #include "dolphin_iconsmodesettings.h"
  27
  28 #include <kdialog.h>
  29
  30 #include <QAbstractProxyModel>
  31 #include <QApplication>
  32 #include <QPainter>
  33 #include <QPoint>
  34
  35 DolphinIconsView::DolphinIconsView(QWidget* parent, DolphinController* controller) :
  36     KCategorizedView(parent),
  37     m_controller(controller),
  38     m_categoryDrawer(0),
  39     m_itemSize(),
  40     m_dragging(false),
  41     m_dropRect()
  42 {
  43     Q_ASSERT(controller != 0);
  44     setViewMode(QListView::IconMode);
  45     setResizeMode(QListView::Adjust);
  46     setSpacing(KDialog::spacingHint());
  47     setMouseTracking(true);
  48     viewport()->setAttribute(Qt::WA_Hover);
  49
  50     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
  51     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
  52     // necessary connecting the signal 'singleClick()' or 'doubleClick' and to handle the
  53     // RETURN-key in keyPressEvent().
  54     if (KGlobalSettings::singleClick()) {
  55         connect(this, SIGNAL(clicked(const QModelIndex&)),
  56                 controller, SLOT(triggerItem(const QModelIndex&)));
  57     } else {
  58         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  59                 controller, SLOT(triggerItem(const QModelIndex&)));
  60     }
  61     connect(this, SIGNAL(entered(const QModelIndex&)),
  62             controller, SLOT(emitItemEntered(const QModelIndex&)));
  63     connect(this, SIGNAL(viewportEntered()),
  64             controller, SLOT(emitViewportEntered()));
  65     connect(controller, SIGNAL(showPreviewChanged(bool)),
  66             this, SLOT(slotShowPreviewChanged(bool)));
  67     connect(controller, SIGNAL(showAdditionalInfoChanged(bool)),
  68             this, SLOT(slotShowAdditionalInfoChanged(bool)));
  69     connect(controller, SIGNAL(zoomIn()),
  70             this, SLOT(zoomIn()));
  71     connect(controller, SIGNAL(zoomOut()),
  72             this, SLOT(zoomOut()));
  73
  74     // apply the icons mode settings to the widget
  75     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
  76     Q_ASSERT(settings != 0);
  77
  78     m_viewOptions = KCategorizedView::viewOptions();
  79     m_viewOptions.showDecorationSelected = true;
  80
  81     QFont font(settings->fontFamily(), settings->fontSize());
  82     font.setItalic(settings->italicFont());
  83     font.setBold(settings->boldFont());
  84     m_viewOptions.font = font;
  85
  86     setWordWrap(settings->numberOfTextlines() > 1);
  87     updateGridSize(controller->showPreview(), controller->showAdditionalInfo());
  88
  89     if (settings->arrangement() == QListView::TopToBottom) {
  90         setFlow(QListView::LeftToRight);
  91         m_viewOptions.decorationPosition = QStyleOptionViewItem::Top;
  92     } else {
  93         setFlow(QListView::TopToBottom);
  94         m_viewOptions.decorationPosition = QStyleOptionViewItem::Left;
  95         m_viewOptions.displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
  96     }
  97
  98     m_categoryDrawer = new DolphinCategoryDrawer();
  99     setCategoryDrawer(m_categoryDrawer);
 100 }
 101
 102 DolphinIconsView::~DolphinIconsView()
 103 {
 104     delete m_categoryDrawer;
 105     m_categoryDrawer = 0;
 106 }
 107
 108 QRect DolphinIconsView::visualRect(const QModelIndex& index) const
 109 {
 110     const bool leftToRightFlow = (flow() == QListView::LeftToRight);
 111
 112     QRect itemRect = KCategorizedView::visualRect(index);
 113     const int maxWidth  = m_itemSize.width();
 114     const int maxHeight = m_itemSize.height();
 115
 116     if (itemRect.width() > maxWidth) {
 117         // assure that the maximum item width is not exceeded
 118         if (leftToRightFlow) {
 119             const int left = itemRect.left() + (itemRect.width() - maxWidth) / 2;
 120             itemRect.setLeft(left);
 121         }
 122         itemRect.setWidth(maxWidth);
 123     }
 124
 125     if (itemRect.height() > maxHeight) {
 126         // assure that the maximum item height is not exceeded
 127         if (!leftToRightFlow) {
 128             const int top = itemRect.top() + (itemRect.height() - maxHeight) / 2;
 129             itemRect.setTop(top);
 130         }
 131         itemRect.setHeight(maxHeight);
 132     }
 133
 134     return itemRect;
 135 }
 136
 137 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 138 {
 139     return m_viewOptions;
 140 }
 141
 142 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 143 {
 144     KCategorizedView::contextMenuEvent(event);
 145     m_controller->triggerContextMenuRequest(event->pos());
 146 }
 147
 148 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 149 {
 150     m_controller->triggerActivation();
 151     if (!indexAt(event->pos()).isValid()) {
 152         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 153         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 154             clearSelection();
 155         }
 156     }
 157
 158     KCategorizedView::mousePressEvent(event);
 159 }
 160
 161 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 162 {
 163     if (event->mimeData()->hasUrls()) {
 164         event->acceptProposedAction();
 165     }
 166     m_dragging = true;
 167 }
 168
 169 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 170 {
 171     KCategorizedView::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 DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 179 {
 180     KCategorizedView::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 DolphinIconsView::dropEvent(QDropEvent* event)
 190 {
 191     if (!selectionModel()->isSelected(indexAt(event->pos()))) {
 192         const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 193         if (!urls.isEmpty()) {
 194             m_controller->indicateDroppedUrls(urls,
 195                                               m_controller->url(),
 196                                               indexAt(event->pos()),
 197                                               event->source());
 198             event->acceptProposedAction();
 199         }
 200     }
 201
 202     KCategorizedView::dropEvent(event);
 203     m_dragging = false;
 204 }
 205
 206 void DolphinIconsView::paintEvent(QPaintEvent* event)
 207 {
 208     KCategorizedView::paintEvent(event);
 209
 210     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 211     if (m_dragging) {
 212         const QBrush& brush = m_viewOptions.palette.brush(QPalette::Normal, QPalette::Highlight);
 213         DolphinController::drawHoverIndication(viewport(), m_dropRect, brush);
 214     }
 215 }
 216
 217 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 218 {
 219     KCategorizedView::keyPressEvent(event);
 220
 221     const QItemSelectionModel* selModel = selectionModel();
 222     const QModelIndex currentIndex = selModel->currentIndex();
 223     const bool triggerItem = currentIndex.isValid()
 224                              && (event->key() == Qt::Key_Return)
 225                              && (selModel->selectedIndexes().count() <= 1);
 226     if (triggerItem) {
 227         m_controller->triggerItem(currentIndex);
 228     }
 229 }
 230
 231 void DolphinIconsView::slotShowPreviewChanged(bool showPreview)
 232 {
 233     updateGridSize(showPreview, m_controller->showAdditionalInfo());
 234 }
 235
 236 void DolphinIconsView::slotShowAdditionalInfoChanged(bool showAdditionalInfo)
 237 {
 238     updateGridSize(m_controller->showPreview(), showAdditionalInfo);
 239 }
 240
 241 void DolphinIconsView::zoomIn()
 242 {
 243     if (isZoomInPossible()) {
 244         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 245
 246         const int oldIconSize = settings->iconSize();
 247         int newIconSize = oldIconSize;
 248
 249         const bool showPreview = m_controller->showPreview();
 250         if (showPreview) {
 251             const int previewSize = increasedIconSize(settings->previewSize());
 252             settings->setPreviewSize(previewSize);
 253         } else {
 254             newIconSize = increasedIconSize(oldIconSize);
 255             settings->setIconSize(newIconSize);
 256             if (settings->previewSize() < newIconSize) {
 257                 // assure that the preview size is always >= the icon size
 258                 settings->setPreviewSize(newIconSize);
 259             }
 260         }
 261
 262         // increase also the grid size
 263         const int diff = newIconSize - oldIconSize;
 264         settings->setItemWidth(settings->itemWidth() + diff);
 265         settings->setItemHeight(settings->itemHeight() + diff);
 266
 267         updateGridSize(showPreview, m_controller->showAdditionalInfo());
 268     }
 269 }
 270
 271 void DolphinIconsView::zoomOut()
 272 {
 273     if (isZoomOutPossible()) {
 274         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 275
 276         const int oldIconSize = settings->iconSize();
 277         int newIconSize = oldIconSize;
 278
 279         const bool showPreview = m_controller->showPreview();
 280         if (showPreview) {
 281             const int previewSize = decreasedIconSize(settings->previewSize());
 282             settings->setPreviewSize(previewSize);
 283             if (settings->iconSize() > previewSize) {
 284                 // assure that the icon size is always <= the preview size
 285                 newIconSize = previewSize;
 286                 settings->setIconSize(newIconSize);
 287             }
 288         } else {
 289             newIconSize = decreasedIconSize(settings->iconSize());
 290             settings->setIconSize(newIconSize);
 291         }
 292
 293         // decrease also the grid size
 294         const int diff = oldIconSize - newIconSize;
 295         settings->setItemWidth(settings->itemWidth() - diff);
 296         settings->setItemHeight(settings->itemHeight() - diff);
 297
 298         updateGridSize(showPreview, m_controller->showAdditionalInfo());
 299     }
 300 }
 301
 302 bool DolphinIconsView::isZoomInPossible() const
 303 {
 304     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 305     const int size = m_controller->showPreview() ? settings->previewSize() : settings->iconSize();
 306     return size < K3Icon::SizeEnormous;
 307 }
 308
 309 bool DolphinIconsView::isZoomOutPossible() const
 310 {
 311     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 312     const int size = m_controller->showPreview() ? settings->previewSize() : settings->iconSize();
 313     return size > K3Icon::SizeSmall;
 314 }
 315
 316 int DolphinIconsView::increasedIconSize(int size) const
 317 {
 318     // TODO: get rid of K3Icon sizes
 319     int incSize = 0;
 320     switch (size) {
 321     case K3Icon::SizeSmall:       incSize = K3Icon::SizeSmallMedium; break;
 322     case K3Icon::SizeSmallMedium: incSize = K3Icon::SizeMedium; break;
 323     case K3Icon::SizeMedium:      incSize = K3Icon::SizeLarge; break;
 324     case K3Icon::SizeLarge:       incSize = K3Icon::SizeHuge; break;
 325     case K3Icon::SizeHuge:        incSize = K3Icon::SizeEnormous; break;
 326     default: Q_ASSERT(false); break;
 327     }
 328     return incSize;
 329 }
 330
 331 int DolphinIconsView::decreasedIconSize(int size) const
 332 {
 333     // TODO: get rid of K3Icon sizes
 334     int decSize = 0;
 335     switch (size) {
 336     case K3Icon::SizeSmallMedium: decSize = K3Icon::SizeSmall; break;
 337     case K3Icon::SizeMedium: decSize = K3Icon::SizeSmallMedium; break;
 338     case K3Icon::SizeLarge: decSize = K3Icon::SizeMedium; break;
 339     case K3Icon::SizeHuge: decSize = K3Icon::SizeLarge; break;
 340     case K3Icon::SizeEnormous: decSize = K3Icon::SizeHuge; break;
 341     default: Q_ASSERT(false); break;
 342     }
 343     return decSize;
 344 }
 345
 346 void DolphinIconsView::updateGridSize(bool showPreview, bool showAdditionalInfo)
 347 {
 348     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 349     Q_ASSERT(settings != 0);
 350
 351     int itemWidth = settings->itemWidth();
 352     int itemHeight = settings->itemHeight();
 353     int size = settings->iconSize();
 354
 355     if (showPreview) {
 356         const int previewSize = settings->previewSize();
 357         const int diff = previewSize - size;
 358         Q_ASSERT(diff >= 0);
 359         itemWidth  += diff;
 360         itemHeight += diff;
 361
 362         size = previewSize;
 363     }
 364
 365     if (showAdditionalInfo) {
 366         itemHeight += m_viewOptions.font.pointSize() * 2;
 367     }
 368
 369     if (settings->arrangement() == QListView::TopToBottom) {
 370         // The decoration width indirectly defines the maximum
 371         // width for the text wrapping. To use the maximum item width
 372         // for text wrapping, it is used as decoration width.
 373         m_viewOptions.decorationSize = QSize(itemWidth, size);
 374     } else {
 375         m_viewOptions.decorationSize = QSize(size, size);
 376     }
 377
 378     const int spacing = settings->gridSpacing();
 379     setGridSize(QSize(itemWidth + spacing, itemHeight + spacing));
 380
 381     m_itemSize = QSize(itemWidth, itemHeight);
 382
 383     m_controller->setZoomInPossible(isZoomInPossible());
 384     m_controller->setZoomOutPossible(isZoomOutPossible());
 385 }
 386
 387 #include "dolphiniconsview.moc"