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