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