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     if (!indexAt(event->pos()).isValid()) {
 110         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 111         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 112             clearSelection();
 113         }
 114     }
 115
 116     KListView::mousePressEvent(event);
 117 }
 118
 119 void DolphinIconsView::mouseReleaseEvent(QMouseEvent* event)
 120 {
 121     KListView::mouseReleaseEvent(event);
 122     m_controller->triggerActivation();
 123 }
 124
 125 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 126 {
 127     if (event->mimeData()->hasUrls()) {
 128         event->acceptProposedAction();
 129     }
 130     m_dragging = true;
 131 }
 132
 133 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 134 {
 135     KListView::dragLeaveEvent(event);
 136
 137     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 138     m_dragging = false;
 139     setDirtyRegion(m_dropRect);
 140 }
 141
 142 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 143 {
 144     KListView::dragMoveEvent(event);
 145
 146     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 147     const QModelIndex index = indexAt(event->pos());
 148     setDirtyRegion(m_dropRect);
 149     m_dropRect = visualRect(index);
 150     setDirtyRegion(m_dropRect);
 151 }
 152
 153 void DolphinIconsView::dropEvent(QDropEvent* event)
 154 {
 155     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 156     if (!urls.isEmpty()) {
 157         m_controller->indicateDroppedUrls(urls,
 158                                           indexAt(event->pos()),
 159                                           event->source());
 160         event->acceptProposedAction();
 161     }
 162     KListView::dropEvent(event);
 163     m_dragging = false;
 164 }
 165
 166 void DolphinIconsView::paintEvent(QPaintEvent* event)
 167 {
 168     KListView::paintEvent(event);
 169
 170     if (m_dragging) {
 171         // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 172         QPainter painter(viewport());
 173         painter.save();
 174         QBrush brush(m_viewOptions.palette.brush(QPalette::Normal, QPalette::Highlight));
 175         QColor color = brush.color();
 176         color.setAlpha(64);
 177         brush.setColor(color);
 178         painter.fillRect(m_dropRect, brush);
 179         painter.restore();
 180     }
 181 }
 182
 183 void DolphinIconsView::slotShowPreviewChanged(bool showPreview)
 184 {
 185     updateGridSize(showPreview, m_controller->showAdditionalInfo());
 186 }
 187
 188 void DolphinIconsView::slotShowAdditionalInfoChanged(bool showAdditionalInfo)
 189 {
 190     updateGridSize(m_controller->showPreview(), showAdditionalInfo);
 191 }
 192
 193 void DolphinIconsView::zoomIn()
 194 {
 195     if (isZoomInPossible()) {
 196         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 197
 198         const int oldIconSize = settings->iconSize();
 199         int newIconSize = oldIconSize;
 200
 201         const bool showPreview = m_controller->showPreview();
 202         if (showPreview) {
 203             const int previewSize = increasedIconSize(settings->previewSize());
 204             settings->setPreviewSize(previewSize);
 205         } else {
 206             newIconSize = increasedIconSize(oldIconSize);
 207             settings->setIconSize(newIconSize);
 208             if (settings->previewSize() < newIconSize) {
 209                 // assure that the preview size is always >= the icon size
 210                 settings->setPreviewSize(newIconSize);
 211             }
 212         }
 213
 214         // increase also the grid size
 215         const int diff = newIconSize - oldIconSize;
 216         settings->setItemWidth(settings->itemWidth() + diff);
 217         settings->setItemHeight(settings->itemHeight() + diff);
 218
 219         updateGridSize(showPreview, m_controller->showAdditionalInfo());
 220     }
 221 }
 222
 223 void DolphinIconsView::zoomOut()
 224 {
 225     if (isZoomOutPossible()) {
 226         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 227
 228         const int oldIconSize = settings->iconSize();
 229         int newIconSize = oldIconSize;
 230
 231         const bool showPreview = m_controller->showPreview();
 232         if (showPreview) {
 233             const int previewSize = decreasedIconSize(settings->previewSize());
 234             settings->setPreviewSize(previewSize);
 235             if (settings->iconSize() > previewSize) {
 236                 // assure that the icon size is always <= the preview size
 237                 newIconSize = previewSize;
 238                 settings->setIconSize(newIconSize);
 239             }
 240         } else {
 241             newIconSize = decreasedIconSize(settings->iconSize());
 242             settings->setIconSize(newIconSize);
 243         }
 244
 245         // decrease also the grid size
 246         const int diff = oldIconSize - newIconSize;
 247         settings->setItemWidth(settings->itemWidth() - diff);
 248         settings->setItemHeight(settings->itemHeight() - diff);
 249
 250         updateGridSize(showPreview, m_controller->showAdditionalInfo());
 251     }
 252 }
 253
 254 bool DolphinIconsView::isZoomInPossible() const
 255 {
 256     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 257     const int size = m_controller->showPreview() ? settings->previewSize() : settings->iconSize();
 258     return size < K3Icon::SizeEnormous;
 259 }
 260
 261 bool DolphinIconsView::isZoomOutPossible() const
 262 {
 263     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 264     const int size = m_controller->showPreview() ? settings->previewSize() : settings->iconSize();
 265     return size > K3Icon::SizeSmall;
 266 }
 267
 268 int DolphinIconsView::increasedIconSize(int size) const
 269 {
 270     // TODO: get rid of K3Icon sizes
 271     int incSize = 0;
 272     switch (size) {
 273     case K3Icon::SizeSmall:       incSize = K3Icon::SizeSmallMedium; break;
 274     case K3Icon::SizeSmallMedium: incSize = K3Icon::SizeMedium; break;
 275     case K3Icon::SizeMedium:      incSize = K3Icon::SizeLarge; break;
 276     case K3Icon::SizeLarge:       incSize = K3Icon::SizeHuge; break;
 277     case K3Icon::SizeHuge:        incSize = K3Icon::SizeEnormous; break;
 278     default: Q_ASSERT(false); break;
 279     }
 280     return incSize;
 281 }
 282
 283 int DolphinIconsView::decreasedIconSize(int size) const
 284 {
 285     // TODO: get rid of K3Icon sizes
 286     int decSize = 0;
 287     switch (size) {
 288     case K3Icon::SizeSmallMedium: decSize = K3Icon::SizeSmall; break;
 289     case K3Icon::SizeMedium: decSize = K3Icon::SizeSmallMedium; break;
 290     case K3Icon::SizeLarge: decSize = K3Icon::SizeMedium; break;
 291     case K3Icon::SizeHuge: decSize = K3Icon::SizeLarge; break;
 292     case K3Icon::SizeEnormous: decSize = K3Icon::SizeHuge; break;
 293     default: Q_ASSERT(false); break;
 294     }
 295     return decSize;
 296 }
 297
 298 void DolphinIconsView::updateGridSize(bool showPreview, bool showAdditionalInfo)
 299 {
 300     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 301     Q_ASSERT(settings != 0);
 302
 303     int itemWidth = settings->itemWidth();
 304     int itemHeight = settings->itemHeight();
 305     int size = settings->iconSize();
 306
 307     if (showPreview) {
 308         const int previewSize = settings->previewSize();
 309         const int diff = previewSize - size;
 310         Q_ASSERT(diff >= 0);
 311         itemWidth  += diff;
 312         itemHeight += diff;
 313
 314         size = previewSize;
 315     }
 316
 317     if (showAdditionalInfo) {
 318         itemHeight += m_viewOptions.font.pointSize() * 2;
 319     }
 320
 321     if (settings->arrangement() == QListView::TopToBottom) {
 322         // The decoration width indirectly defines the maximum
 323         // width for the text wrapping. To use the maximum item width
 324         // for text wrapping, it is used as decoration width.
 325         m_viewOptions.decorationSize = QSize(itemWidth, size);
 326     } else {
 327         m_viewOptions.decorationSize = QSize(size, size);
 328     }
 329
 330     const int spacing = settings->gridSpacing();
 331     setGridSize(QSize(itemWidth + spacing, itemHeight + spacing));
 332
 333     m_controller->setZoomInPossible(isZoomInPossible());
 334     m_controller->setZoomOutPossible(isZoomOutPossible());
 335 }
 336
 337 #include "dolphiniconsview.moc"