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                                               m_controller->url(),
 189                                               indexAt(event->pos()),
 190                                               event->source());
 191             event->acceptProposedAction();
 192         }
 193     }
 194
 195     KCategorizedView::dropEvent(event);
 196     m_dragging = false;
 197 }
 198
 199 void DolphinIconsView::paintEvent(QPaintEvent* event)
 200 {
 201     KCategorizedView::paintEvent(event);
 202
 203     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 204     if (m_dragging) {
 205         const QBrush& brush = m_viewOptions.palette.brush(QPalette::Normal, QPalette::Highlight);
 206         DolphinController::drawHoverIndication(viewport(), m_dropRect, brush);
 207     }
 208 }
 209
 210 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 211 {
 212     KCategorizedView::keyPressEvent(event);
 213
 214     const QItemSelectionModel* selModel = selectionModel();
 215     const QModelIndex currentIndex = selModel->currentIndex();
 216     const bool triggerItem = currentIndex.isValid()
 217                              && (event->key() == Qt::Key_Return)
 218                              && (selModel->selectedIndexes().count() <= 1);
 219     if (triggerItem) {
 220         m_controller->triggerItem(currentIndex);
 221     }
 222 }
 223
 224 void DolphinIconsView::slotShowPreviewChanged(bool showPreview)
 225 {
 226     updateGridSize(showPreview, m_controller->showAdditionalInfo());
 227 }
 228
 229 void DolphinIconsView::slotShowAdditionalInfoChanged(bool showAdditionalInfo)
 230 {
 231     updateGridSize(m_controller->showPreview(), showAdditionalInfo);
 232 }
 233
 234 void DolphinIconsView::zoomIn()
 235 {
 236     if (isZoomInPossible()) {
 237         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 238
 239         const int oldIconSize = settings->iconSize();
 240         int newIconSize = oldIconSize;
 241
 242         const bool showPreview = m_controller->showPreview();
 243         if (showPreview) {
 244             const int previewSize = increasedIconSize(settings->previewSize());
 245             settings->setPreviewSize(previewSize);
 246         } else {
 247             newIconSize = increasedIconSize(oldIconSize);
 248             settings->setIconSize(newIconSize);
 249             if (settings->previewSize() < newIconSize) {
 250                 // assure that the preview size is always >= the icon size
 251                 settings->setPreviewSize(newIconSize);
 252             }
 253         }
 254
 255         // increase also the grid size
 256         const int diff = newIconSize - oldIconSize;
 257         settings->setItemWidth(settings->itemWidth() + diff);
 258         settings->setItemHeight(settings->itemHeight() + diff);
 259
 260         updateGridSize(showPreview, m_controller->showAdditionalInfo());
 261     }
 262 }
 263
 264 void DolphinIconsView::zoomOut()
 265 {
 266     if (isZoomOutPossible()) {
 267         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 268
 269         const int oldIconSize = settings->iconSize();
 270         int newIconSize = oldIconSize;
 271
 272         const bool showPreview = m_controller->showPreview();
 273         if (showPreview) {
 274             const int previewSize = decreasedIconSize(settings->previewSize());
 275             settings->setPreviewSize(previewSize);
 276             if (settings->iconSize() > previewSize) {
 277                 // assure that the icon size is always <= the preview size
 278                 newIconSize = previewSize;
 279                 settings->setIconSize(newIconSize);
 280             }
 281         } else {
 282             newIconSize = decreasedIconSize(settings->iconSize());
 283             settings->setIconSize(newIconSize);
 284         }
 285
 286         // decrease also the grid size
 287         const int diff = oldIconSize - newIconSize;
 288         settings->setItemWidth(settings->itemWidth() - diff);
 289         settings->setItemHeight(settings->itemHeight() - diff);
 290
 291         updateGridSize(showPreview, m_controller->showAdditionalInfo());
 292     }
 293 }
 294
 295 bool DolphinIconsView::isZoomInPossible() const
 296 {
 297     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 298     const int size = m_controller->showPreview() ? settings->previewSize() : settings->iconSize();
 299     return size < K3Icon::SizeEnormous;
 300 }
 301
 302 bool DolphinIconsView::isZoomOutPossible() const
 303 {
 304     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 305     const int size = m_controller->showPreview() ? settings->previewSize() : settings->iconSize();
 306     return size > K3Icon::SizeSmall;
 307 }
 308
 309 int DolphinIconsView::increasedIconSize(int size) const
 310 {
 311     // TODO: get rid of K3Icon sizes
 312     int incSize = 0;
 313     switch (size) {
 314     case K3Icon::SizeSmall:       incSize = K3Icon::SizeSmallMedium; break;
 315     case K3Icon::SizeSmallMedium: incSize = K3Icon::SizeMedium; break;
 316     case K3Icon::SizeMedium:      incSize = K3Icon::SizeLarge; break;
 317     case K3Icon::SizeLarge:       incSize = K3Icon::SizeHuge; break;
 318     case K3Icon::SizeHuge:        incSize = K3Icon::SizeEnormous; break;
 319     default: Q_ASSERT(false); break;
 320     }
 321     return incSize;
 322 }
 323
 324 int DolphinIconsView::decreasedIconSize(int size) const
 325 {
 326     // TODO: get rid of K3Icon sizes
 327     int decSize = 0;
 328     switch (size) {
 329     case K3Icon::SizeSmallMedium: decSize = K3Icon::SizeSmall; break;
 330     case K3Icon::SizeMedium: decSize = K3Icon::SizeSmallMedium; break;
 331     case K3Icon::SizeLarge: decSize = K3Icon::SizeMedium; break;
 332     case K3Icon::SizeHuge: decSize = K3Icon::SizeLarge; break;
 333     case K3Icon::SizeEnormous: decSize = K3Icon::SizeHuge; break;
 334     default: Q_ASSERT(false); break;
 335     }
 336     return decSize;
 337 }
 338
 339 void DolphinIconsView::updateGridSize(bool showPreview, bool showAdditionalInfo)
 340 {
 341     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 342     Q_ASSERT(settings != 0);
 343
 344     int itemWidth = settings->itemWidth();
 345     int itemHeight = settings->itemHeight();
 346     int size = settings->iconSize();
 347
 348     if (showPreview) {
 349         const int previewSize = settings->previewSize();
 350         const int diff = previewSize - size;
 351         Q_ASSERT(diff >= 0);
 352         itemWidth  += diff;
 353         itemHeight += diff;
 354
 355         size = previewSize;
 356     }
 357
 358     if (showAdditionalInfo) {
 359         itemHeight += m_viewOptions.font.pointSize() * 2;
 360     }
 361
 362     if (settings->arrangement() == QListView::TopToBottom) {
 363         // The decoration width indirectly defines the maximum
 364         // width for the text wrapping. To use the maximum item width
 365         // for text wrapping, it is used as decoration width.
 366         m_viewOptions.decorationSize = QSize(itemWidth, size);
 367     } else {
 368         m_viewOptions.decorationSize = QSize(size, size);
 369     }
 370
 371     const int spacing = settings->gridSpacing();
 372     setGridSize(QSize(itemWidth + spacing, itemHeight + spacing));
 373
 374     m_itemSize = QSize(itemWidth, itemHeight);
 375
 376     m_controller->setZoomInPossible(isZoomInPossible());
 377     m_controller->setZoomOutPossible(isZoomOutPossible());
 378 }
 379
 380 #include "dolphiniconsview.moc"