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