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     if (itemCategorizer() == 0) {
 101         const bool leftToRightFlow = (flow() == QListView::LeftToRight);
 102
 103         QRect itemRect = KCategorizedView::visualRect(index);
 104         const int maxWidth  = m_itemSize.width();
 105         const int maxHeight = m_itemSize.height();
 106
 107         if (itemRect.width() > maxWidth) {
 108             // assure that the maximum item width is not exceeded
 109             if (leftToRightFlow) {
 110                 const int left = itemRect.left() + (itemRect.width() - maxWidth) / 2;
 111                 itemRect.setLeft(left);
 112             }
 113             itemRect.setWidth(maxWidth);
 114         }
 115
 116         if (itemRect.height() > maxHeight) {
 117             // assure that the maximum item height is not exceeded
 118             if (!leftToRightFlow) {
 119                 const int top = itemRect.top() + (itemRect.height() - maxHeight) / 2;
 120                 itemRect.setTop(top);
 121             }
 122             itemRect.setHeight(maxHeight);
 123         }
 124
 125         return itemRect;
 126     }
 127
 128     return KCategorizedView::visualRect(index);
 129 }
 130
 131 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 132 {
 133     return m_viewOptions;
 134 }
 135
 136 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 137 {
 138     KCategorizedView::contextMenuEvent(event);
 139     m_controller->triggerContextMenuRequest(event->pos());
 140 }
 141
 142 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 143 {
 144     m_controller->triggerActivation();
 145     if (!indexAt(event->pos()).isValid()) {
 146         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 147         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 148             clearSelection();
 149         }
 150     }
 151
 152     KCategorizedView::mousePressEvent(event);
 153 }
 154
 155 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 156 {
 157     if (event->mimeData()->hasUrls()) {
 158         event->acceptProposedAction();
 159     }
 160     m_dragging = true;
 161 }
 162
 163 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 164 {
 165     KCategorizedView::dragLeaveEvent(event);
 166
 167     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 168     m_dragging = false;
 169     setDirtyRegion(m_dropRect);
 170 }
 171
 172 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 173 {
 174     KCategorizedView::dragMoveEvent(event);
 175
 176     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 177     const QModelIndex index = indexAt(event->pos());
 178     setDirtyRegion(m_dropRect);
 179     m_dropRect = visualRect(index);
 180     setDirtyRegion(m_dropRect);
 181 }
 182
 183 void DolphinIconsView::dropEvent(QDropEvent* event)
 184 {
 185     if (!selectionModel()->isSelected(indexAt(event->pos()))) {
 186         const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 187         if (!urls.isEmpty()) {
 188             m_controller->indicateDroppedUrls(urls,
 189                                               indexAt(event->pos()),
 190                                               event->source());
 191             event->acceptProposedAction();
 192         }
 193     }
 194     KCategorizedView::dropEvent(event);
 195     m_dragging = false;
 196 }
 197
 198 void DolphinIconsView::paintEvent(QPaintEvent* event)
 199 {
 200     KCategorizedView::paintEvent(event);
 201
 202     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 203     if (m_dragging) {
 204         const QBrush& brush = m_viewOptions.palette.brush(QPalette::Normal, QPalette::Highlight);
 205         DolphinController::drawHoverIndication(viewport(), m_dropRect, brush);
 206     }
 207 }
 208
 209 void DolphinIconsView::slotShowPreviewChanged(bool showPreview)
 210 {
 211     updateGridSize(showPreview, m_controller->showAdditionalInfo());
 212 }
 213
 214 void DolphinIconsView::slotShowAdditionalInfoChanged(bool showAdditionalInfo)
 215 {
 216     updateGridSize(m_controller->showPreview(), showAdditionalInfo);
 217 }
 218
 219 void DolphinIconsView::zoomIn()
 220 {
 221     if (isZoomInPossible()) {
 222         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 223
 224         const int oldIconSize = settings->iconSize();
 225         int newIconSize = oldIconSize;
 226
 227         const bool showPreview = m_controller->showPreview();
 228         if (showPreview) {
 229             const int previewSize = increasedIconSize(settings->previewSize());
 230             settings->setPreviewSize(previewSize);
 231         } else {
 232             newIconSize = increasedIconSize(oldIconSize);
 233             settings->setIconSize(newIconSize);
 234             if (settings->previewSize() < newIconSize) {
 235                 // assure that the preview size is always >= the icon size
 236                 settings->setPreviewSize(newIconSize);
 237             }
 238         }
 239
 240         // increase also the grid size
 241         const int diff = newIconSize - oldIconSize;
 242         settings->setItemWidth(settings->itemWidth() + diff);
 243         settings->setItemHeight(settings->itemHeight() + diff);
 244
 245         updateGridSize(showPreview, m_controller->showAdditionalInfo());
 246     }
 247 }
 248
 249 void DolphinIconsView::zoomOut()
 250 {
 251     if (isZoomOutPossible()) {
 252         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 253
 254         const int oldIconSize = settings->iconSize();
 255         int newIconSize = oldIconSize;
 256
 257         const bool showPreview = m_controller->showPreview();
 258         if (showPreview) {
 259             const int previewSize = decreasedIconSize(settings->previewSize());
 260             settings->setPreviewSize(previewSize);
 261             if (settings->iconSize() > previewSize) {
 262                 // assure that the icon size is always <= the preview size
 263                 newIconSize = previewSize;
 264                 settings->setIconSize(newIconSize);
 265             }
 266         } else {
 267             newIconSize = decreasedIconSize(settings->iconSize());
 268             settings->setIconSize(newIconSize);
 269         }
 270
 271         // decrease also the grid size
 272         const int diff = oldIconSize - newIconSize;
 273         settings->setItemWidth(settings->itemWidth() - diff);
 274         settings->setItemHeight(settings->itemHeight() - diff);
 275
 276         updateGridSize(showPreview, m_controller->showAdditionalInfo());
 277     }
 278 }
 279
 280 bool DolphinIconsView::isZoomInPossible() const
 281 {
 282     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 283     const int size = m_controller->showPreview() ? settings->previewSize() : settings->iconSize();
 284     return size < K3Icon::SizeEnormous;
 285 }
 286
 287 bool DolphinIconsView::isZoomOutPossible() const
 288 {
 289     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 290     const int size = m_controller->showPreview() ? settings->previewSize() : settings->iconSize();
 291     return size > K3Icon::SizeSmall;
 292 }
 293
 294 int DolphinIconsView::increasedIconSize(int size) const
 295 {
 296     // TODO: get rid of K3Icon sizes
 297     int incSize = 0;
 298     switch (size) {
 299     case K3Icon::SizeSmall:       incSize = K3Icon::SizeSmallMedium; break;
 300     case K3Icon::SizeSmallMedium: incSize = K3Icon::SizeMedium; break;
 301     case K3Icon::SizeMedium:      incSize = K3Icon::SizeLarge; break;
 302     case K3Icon::SizeLarge:       incSize = K3Icon::SizeHuge; break;
 303     case K3Icon::SizeHuge:        incSize = K3Icon::SizeEnormous; break;
 304     default: Q_ASSERT(false); break;
 305     }
 306     return incSize;
 307 }
 308
 309 int DolphinIconsView::decreasedIconSize(int size) const
 310 {
 311     // TODO: get rid of K3Icon sizes
 312     int decSize = 0;
 313     switch (size) {
 314     case K3Icon::SizeSmallMedium: decSize = K3Icon::SizeSmall; break;
 315     case K3Icon::SizeMedium: decSize = K3Icon::SizeSmallMedium; break;
 316     case K3Icon::SizeLarge: decSize = K3Icon::SizeMedium; break;
 317     case K3Icon::SizeHuge: decSize = K3Icon::SizeLarge; break;
 318     case K3Icon::SizeEnormous: decSize = K3Icon::SizeHuge; break;
 319     default: Q_ASSERT(false); break;
 320     }
 321     return decSize;
 322 }
 323
 324 void DolphinIconsView::updateGridSize(bool showPreview, bool showAdditionalInfo)
 325 {
 326     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 327     Q_ASSERT(settings != 0);
 328
 329     int itemWidth = settings->itemWidth();
 330     int itemHeight = settings->itemHeight();
 331     int size = settings->iconSize();
 332
 333     if (showPreview) {
 334         const int previewSize = settings->previewSize();
 335         const int diff = previewSize - size;
 336         Q_ASSERT(diff >= 0);
 337         itemWidth  += diff;
 338         itemHeight += diff;
 339
 340         size = previewSize;
 341     }
 342
 343     if (showAdditionalInfo) {
 344         itemHeight += m_viewOptions.font.pointSize() * 2;
 345     }
 346
 347     if (settings->arrangement() == QListView::TopToBottom) {
 348         // The decoration width indirectly defines the maximum
 349         // width for the text wrapping. To use the maximum item width
 350         // for text wrapping, it is used as decoration width.
 351         m_viewOptions.decorationSize = QSize(itemWidth, size);
 352     } else {
 353         m_viewOptions.decorationSize = QSize(size, size);
 354     }
 355
 356     const int spacing = settings->gridSpacing();
 357     setGridSize(QSize(itemWidth + spacing, itemHeight + spacing));
 358
 359     m_itemSize = QSize(itemWidth, itemHeight);
 360
 361     m_controller->setZoomInPossible(isZoomInPossible());
 362     m_controller->setZoomOutPossible(isZoomOutPossible());
 363 }
 364
 365 #include "dolphiniconsview.moc"