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 "dolphincontroller.h"
  23 #include "dolphinsettings.h"
  24
  25 #include "dolphin_iconsmodesettings.h"
  26
  27 #include <kdialog.h>
  28
  29 #include <QAbstractProxyModel>
  30 #include <QApplication>
  31 #include <QPainter>
  32 #include <QPoint>
  33
  34 DolphinIconsView::DolphinIconsView(QWidget* parent, DolphinController* controller) :
  35     KCategorizedView(parent),
  36     m_controller(controller),
  37     m_itemSize(),
  38     m_dragging(false),
  39     m_dropRect()
  40 {
  41     Q_ASSERT(controller != 0);
  42     setViewMode(QListView::IconMode);
  43     setResizeMode(QListView::Adjust);
  44     setSpacing(KDialog::spacingHint());
  45     setMouseTracking(true);
  46     viewport()->setAttribute(Qt::WA_Hover);
  47
  48     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
  49     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
  50     // necessary connecting the signal 'singleClick()' or 'doubleClick' and to handle the
  51     // RETURN-key in keyPressEvent().
  52     if (KGlobalSettings::singleClick()) {
  53         connect(this, SIGNAL(clicked(const QModelIndex&)),
  54                 controller, SLOT(triggerItem(const QModelIndex&)));
  55     } else {
  56         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  57                 controller, SLOT(triggerItem(const QModelIndex&)));
  58     }
  59     connect(this, SIGNAL(entered(const QModelIndex&)),
  60             controller, SLOT(emitItemEntered(const QModelIndex&)));
  61     connect(this, SIGNAL(viewportEntered()),
  62             controller, SLOT(emitViewportEntered()));
  63     connect(controller, SIGNAL(showPreviewChanged(bool)),
  64             this, SLOT(slotShowPreviewChanged(bool)));
  65     connect(controller, SIGNAL(showAdditionalInfoChanged(bool)),
  66             this, SLOT(slotShowAdditionalInfoChanged(bool)));
  67     connect(controller, SIGNAL(zoomIn()),
  68             this, SLOT(zoomIn()));
  69     connect(controller, SIGNAL(zoomOut()),
  70             this, SLOT(zoomOut()));
  71
  72     // apply the icons mode settings to the widget
  73     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
  74     Q_ASSERT(settings != 0);
  75
  76     m_viewOptions = KCategorizedView::viewOptions();
  77     m_viewOptions.showDecorationSelected = true;
  78
  79     QFont font(settings->fontFamily(), settings->fontSize());
  80     font.setItalic(settings->italicFont());
  81     font.setBold(settings->boldFont());
  82     m_viewOptions.font = font;
  83
  84     setWordWrap(settings->numberOfTextlines() > 1);
  85     updateGridSize(controller->showPreview(), controller->showAdditionalInfo());
  86
  87     if (settings->arrangement() == QListView::TopToBottom) {
  88         setFlow(QListView::LeftToRight);
  89         m_viewOptions.decorationPosition = QStyleOptionViewItem::Top;
  90     } else {
  91         setFlow(QListView::TopToBottom);
  92         m_viewOptions.decorationPosition = QStyleOptionViewItem::Left;
  93         m_viewOptions.displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
  94     }
  95 }
  96
  97 DolphinIconsView::~DolphinIconsView()
  98 {
  99 }
 100
 101 QRect DolphinIconsView::visualRect(const QModelIndex& index) const
 102 {
 103     const bool leftToRightFlow = (flow() == QListView::LeftToRight);
 104
 105     QRect itemRect = KCategorizedView::visualRect(index);
 106     const int maxWidth  = m_itemSize.width();
 107     const int maxHeight = m_itemSize.height();
 108
 109     if (itemRect.width() > maxWidth) {
 110         // assure that the maximum item width is not exceeded
 111         if (leftToRightFlow) {
 112             const int left = itemRect.left() + (itemRect.width() - maxWidth) / 2;
 113             itemRect.setLeft(left);
 114         }
 115         itemRect.setWidth(maxWidth);
 116     }
 117
 118     if (itemRect.height() > maxHeight) {
 119         // assure that the maximum item height is not exceeded
 120         if (!leftToRightFlow) {
 121             const int top = itemRect.top() + (itemRect.height() - maxHeight) / 2;
 122             itemRect.setTop(top);
 123         }
 124         itemRect.setHeight(maxHeight);
 125     }
 126
 127     return itemRect;
 128 }
 129
 130 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 131 {
 132     return m_viewOptions;
 133 }
 134
 135 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 136 {
 137     KCategorizedView::contextMenuEvent(event);
 138     m_controller->triggerContextMenuRequest(event->pos());
 139 }
 140
 141 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 142 {
 143     m_controller->triggerActivation();
 144     if (!indexAt(event->pos()).isValid()) {
 145         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 146         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 147             clearSelection();
 148         }
 149     }
 150
 151     KCategorizedView::mousePressEvent(event);
 152 }
 153
 154 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 155 {
 156     if (event->mimeData()->hasUrls()) {
 157         event->acceptProposedAction();
 158     }
 159     m_dragging = true;
 160 }
 161
 162 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 163 {
 164     KCategorizedView::dragLeaveEvent(event);
 165
 166     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 167     m_dragging = false;
 168     setDirtyRegion(m_dropRect);
 169 }
 170
 171 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 172 {
 173     KCategorizedView::dragMoveEvent(event);
 174
 175     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 176     const QModelIndex index = indexAt(event->pos());
 177     setDirtyRegion(m_dropRect);
 178     m_dropRect = visualRect(index);
 179     setDirtyRegion(m_dropRect);
 180 }
 181
 182 void DolphinIconsView::dropEvent(QDropEvent* event)
 183 {
 184     if (!selectionModel()->isSelected(indexAt(event->pos()))) {
 185         const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 186         if (!urls.isEmpty()) {
 187             m_controller->indicateDroppedUrls(urls,
 188                                               indexAt(event->pos()),
 189                                               event->source());
 190             event->acceptProposedAction();
 191         }
 192     }
 193
 194     KCategorizedView::dropEvent(event);
 195     m_dragging = false;
 196 }
 197
 198 void DolphinIconsView::paintEvent(QPaintEvent* event)
 199 {
 200     KCategorizedView::paintEvent(event);
 201
 202     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 203     if (m_dragging) {
 204         const QBrush& brush = m_viewOptions.palette.brush(QPalette::Normal, QPalette::Highlight);
 205         DolphinController::drawHoverIndication(viewport(), m_dropRect, brush);
 206     }
 207 }
 208
 209 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 210 {
 211     KCategorizedView::keyPressEvent(event);
 212
 213     const QItemSelectionModel* selModel = selectionModel();
 214     const QModelIndex currentIndex = selModel->currentIndex();
 215     const bool triggerItem = currentIndex.isValid()
 216                              && (event->key() == Qt::Key_Return)
 217                              && (selModel->selectedIndexes().count() <= 1);
 218     if (triggerItem) {
 219         m_controller->triggerItem(currentIndex);
 220     }
 221 }
 222
 223 void DolphinIconsView::slotShowPreviewChanged(bool showPreview)
 224 {
 225     updateGridSize(showPreview, m_controller->showAdditionalInfo());
 226 }
 227
 228 void DolphinIconsView::slotShowAdditionalInfoChanged(bool showAdditionalInfo)
 229 {
 230     updateGridSize(m_controller->showPreview(), showAdditionalInfo);
 231 }
 232
 233 void DolphinIconsView::zoomIn()
 234 {
 235     if (isZoomInPossible()) {
 236         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 237
 238         const int oldIconSize = settings->iconSize();
 239         int newIconSize = oldIconSize;
 240
 241         const bool showPreview = m_controller->showPreview();
 242         if (showPreview) {
 243             const int previewSize = increasedIconSize(settings->previewSize());
 244             settings->setPreviewSize(previewSize);
 245         } else {
 246             newIconSize = increasedIconSize(oldIconSize);
 247             settings->setIconSize(newIconSize);
 248             if (settings->previewSize() < newIconSize) {
 249                 // assure that the preview size is always >= the icon size
 250                 settings->setPreviewSize(newIconSize);
 251             }
 252         }
 253
 254         // increase also the grid size
 255         const int diff = newIconSize - oldIconSize;
 256         settings->setItemWidth(settings->itemWidth() + diff);
 257         settings->setItemHeight(settings->itemHeight() + diff);
 258
 259         updateGridSize(showPreview, m_controller->showAdditionalInfo());
 260     }
 261 }
 262
 263 void DolphinIconsView::zoomOut()
 264 {
 265     if (isZoomOutPossible()) {
 266         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 267
 268         const int oldIconSize = settings->iconSize();
 269         int newIconSize = oldIconSize;
 270
 271         const bool showPreview = m_controller->showPreview();
 272         if (showPreview) {
 273             const int previewSize = decreasedIconSize(settings->previewSize());
 274             settings->setPreviewSize(previewSize);
 275             if (settings->iconSize() > previewSize) {
 276                 // assure that the icon size is always <= the preview size
 277                 newIconSize = previewSize;
 278                 settings->setIconSize(newIconSize);
 279             }
 280         } else {
 281             newIconSize = decreasedIconSize(settings->iconSize());
 282             settings->setIconSize(newIconSize);
 283         }
 284
 285         // decrease also the grid size
 286         const int diff = oldIconSize - newIconSize;
 287         settings->setItemWidth(settings->itemWidth() - diff);
 288         settings->setItemHeight(settings->itemHeight() - diff);
 289
 290         updateGridSize(showPreview, m_controller->showAdditionalInfo());
 291     }
 292 }
 293
 294 bool DolphinIconsView::isZoomInPossible() const
 295 {
 296     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 297     const int size = m_controller->showPreview() ? settings->previewSize() : settings->iconSize();
 298     return size < K3Icon::SizeEnormous;
 299 }
 300
 301 bool DolphinIconsView::isZoomOutPossible() const
 302 {
 303     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 304     const int size = m_controller->showPreview() ? settings->previewSize() : settings->iconSize();
 305     return size > K3Icon::SizeSmall;
 306 }
 307
 308 int DolphinIconsView::increasedIconSize(int size) const
 309 {
 310     // TODO: get rid of K3Icon sizes
 311     int incSize = 0;
 312     switch (size) {
 313     case K3Icon::SizeSmall:       incSize = K3Icon::SizeSmallMedium; break;
 314     case K3Icon::SizeSmallMedium: incSize = K3Icon::SizeMedium; break;
 315     case K3Icon::SizeMedium:      incSize = K3Icon::SizeLarge; break;
 316     case K3Icon::SizeLarge:       incSize = K3Icon::SizeHuge; break;
 317     case K3Icon::SizeHuge:        incSize = K3Icon::SizeEnormous; break;
 318     default: Q_ASSERT(false); break;
 319     }
 320     return incSize;
 321 }
 322
 323 int DolphinIconsView::decreasedIconSize(int size) const
 324 {
 325     // TODO: get rid of K3Icon sizes
 326     int decSize = 0;
 327     switch (size) {
 328     case K3Icon::SizeSmallMedium: decSize = K3Icon::SizeSmall; break;
 329     case K3Icon::SizeMedium: decSize = K3Icon::SizeSmallMedium; break;
 330     case K3Icon::SizeLarge: decSize = K3Icon::SizeMedium; break;
 331     case K3Icon::SizeHuge: decSize = K3Icon::SizeLarge; break;
 332     case K3Icon::SizeEnormous: decSize = K3Icon::SizeHuge; break;
 333     default: Q_ASSERT(false); break;
 334     }
 335     return decSize;
 336 }
 337
 338 void DolphinIconsView::updateGridSize(bool showPreview, bool showAdditionalInfo)
 339 {
 340     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 341     Q_ASSERT(settings != 0);
 342
 343     int itemWidth = settings->itemWidth();
 344     int itemHeight = settings->itemHeight();
 345     int size = settings->iconSize();
 346
 347     if (showPreview) {
 348         const int previewSize = settings->previewSize();
 349         const int diff = previewSize - size;
 350         Q_ASSERT(diff >= 0);
 351         itemWidth  += diff;
 352         itemHeight += diff;
 353
 354         size = previewSize;
 355     }
 356
 357     if (showAdditionalInfo) {
 358         itemHeight += m_viewOptions.font.pointSize() * 2;
 359     }
 360
 361     if (settings->arrangement() == QListView::TopToBottom) {
 362         // The decoration width indirectly defines the maximum
 363         // width for the text wrapping. To use the maximum item width
 364         // for text wrapping, it is used as decoration width.
 365         m_viewOptions.decorationSize = QSize(itemWidth, size);
 366     } else {
 367         m_viewOptions.decorationSize = QSize(size, size);
 368     }
 369
 370     const int spacing = settings->gridSpacing();
 371     setGridSize(QSize(itemWidth + spacing, itemHeight + spacing));
 372
 373     m_itemSize = QSize(itemWidth, itemHeight);
 374
 375     m_controller->setZoomInPossible(isZoomInPossible());
 376     m_controller->setZoomOutPossible(isZoomOutPossible());
 377 }
 378
 379 #include "dolphiniconsview.moc"