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     if (KGlobalSettings::singleClick()) {
  48         connect(this, SIGNAL(clicked(const QModelIndex&)),
  49                 controller, SLOT(triggerItem(const QModelIndex&)));
  50     } else {
  51         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  52                 controller, SLOT(triggerItem(const QModelIndex&)));
  53     }
  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     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 166     if (m_dragging) {
 167         const QBrush& brush = m_viewOptions.palette.brush(QPalette::Normal, QPalette::Highlight);
 168         DolphinController::drawHoverIndication(viewport(), m_dropRect, brush);
 169     }
 170 }
 171
 172 void DolphinIconsView::slotShowPreviewChanged(bool showPreview)
 173 {
 174     updateGridSize(showPreview, m_controller->showAdditionalInfo());
 175 }
 176
 177 void DolphinIconsView::slotShowAdditionalInfoChanged(bool showAdditionalInfo)
 178 {
 179     updateGridSize(m_controller->showPreview(), showAdditionalInfo);
 180 }
 181
 182 void DolphinIconsView::zoomIn()
 183 {
 184     if (isZoomInPossible()) {
 185         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 186
 187         const int oldIconSize = settings->iconSize();
 188         int newIconSize = oldIconSize;
 189
 190         const bool showPreview = m_controller->showPreview();
 191         if (showPreview) {
 192             const int previewSize = increasedIconSize(settings->previewSize());
 193             settings->setPreviewSize(previewSize);
 194         } else {
 195             newIconSize = increasedIconSize(oldIconSize);
 196             settings->setIconSize(newIconSize);
 197             if (settings->previewSize() < newIconSize) {
 198                 // assure that the preview size is always >= the icon size
 199                 settings->setPreviewSize(newIconSize);
 200             }
 201         }
 202
 203         // increase also the grid size
 204         const int diff = newIconSize - oldIconSize;
 205         settings->setItemWidth(settings->itemWidth() + diff);
 206         settings->setItemHeight(settings->itemHeight() + diff);
 207
 208         updateGridSize(showPreview, m_controller->showAdditionalInfo());
 209     }
 210 }
 211
 212 void DolphinIconsView::zoomOut()
 213 {
 214     if (isZoomOutPossible()) {
 215         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 216
 217         const int oldIconSize = settings->iconSize();
 218         int newIconSize = oldIconSize;
 219
 220         const bool showPreview = m_controller->showPreview();
 221         if (showPreview) {
 222             const int previewSize = decreasedIconSize(settings->previewSize());
 223             settings->setPreviewSize(previewSize);
 224             if (settings->iconSize() > previewSize) {
 225                 // assure that the icon size is always <= the preview size
 226                 newIconSize = previewSize;
 227                 settings->setIconSize(newIconSize);
 228             }
 229         } else {
 230             newIconSize = decreasedIconSize(settings->iconSize());
 231             settings->setIconSize(newIconSize);
 232         }
 233
 234         // decrease also the grid size
 235         const int diff = oldIconSize - newIconSize;
 236         settings->setItemWidth(settings->itemWidth() - diff);
 237         settings->setItemHeight(settings->itemHeight() - diff);
 238
 239         updateGridSize(showPreview, m_controller->showAdditionalInfo());
 240     }
 241 }
 242
 243 bool DolphinIconsView::isZoomInPossible() const
 244 {
 245     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 246     const int size = m_controller->showPreview() ? settings->previewSize() : settings->iconSize();
 247     return size < K3Icon::SizeEnormous;
 248 }
 249
 250 bool DolphinIconsView::isZoomOutPossible() const
 251 {
 252     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 253     const int size = m_controller->showPreview() ? settings->previewSize() : settings->iconSize();
 254     return size > K3Icon::SizeSmall;
 255 }
 256
 257 int DolphinIconsView::increasedIconSize(int size) const
 258 {
 259     // TODO: get rid of K3Icon sizes
 260     int incSize = 0;
 261     switch (size) {
 262     case K3Icon::SizeSmall:       incSize = K3Icon::SizeSmallMedium; break;
 263     case K3Icon::SizeSmallMedium: incSize = K3Icon::SizeMedium; break;
 264     case K3Icon::SizeMedium:      incSize = K3Icon::SizeLarge; break;
 265     case K3Icon::SizeLarge:       incSize = K3Icon::SizeHuge; break;
 266     case K3Icon::SizeHuge:        incSize = K3Icon::SizeEnormous; break;
 267     default: Q_ASSERT(false); break;
 268     }
 269     return incSize;
 270 }
 271
 272 int DolphinIconsView::decreasedIconSize(int size) const
 273 {
 274     // TODO: get rid of K3Icon sizes
 275     int decSize = 0;
 276     switch (size) {
 277     case K3Icon::SizeSmallMedium: decSize = K3Icon::SizeSmall; break;
 278     case K3Icon::SizeMedium: decSize = K3Icon::SizeSmallMedium; break;
 279     case K3Icon::SizeLarge: decSize = K3Icon::SizeMedium; break;
 280     case K3Icon::SizeHuge: decSize = K3Icon::SizeLarge; break;
 281     case K3Icon::SizeEnormous: decSize = K3Icon::SizeHuge; break;
 282     default: Q_ASSERT(false); break;
 283     }
 284     return decSize;
 285 }
 286
 287 void DolphinIconsView::updateGridSize(bool showPreview, bool showAdditionalInfo)
 288 {
 289     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 290     Q_ASSERT(settings != 0);
 291
 292     int itemWidth = settings->itemWidth();
 293     int itemHeight = settings->itemHeight();
 294     int size = settings->iconSize();
 295
 296     if (showPreview) {
 297         const int previewSize = settings->previewSize();
 298         const int diff = previewSize - size;
 299         Q_ASSERT(diff >= 0);
 300         itemWidth  += diff;
 301         itemHeight += diff;
 302
 303         size = previewSize;
 304     }
 305
 306     if (showAdditionalInfo) {
 307         itemHeight += m_viewOptions.font.pointSize() * 2;
 308     }
 309
 310     if (settings->arrangement() == QListView::TopToBottom) {
 311         // The decoration width indirectly defines the maximum
 312         // width for the text wrapping. To use the maximum item width
 313         // for text wrapping, it is used as decoration width.
 314         m_viewOptions.decorationSize = QSize(itemWidth, size);
 315     } else {
 316         m_viewOptions.decorationSize = QSize(size, size);
 317     }
 318
 319     const int spacing = settings->gridSpacing();
 320     setGridSize(QSize(itemWidth + spacing, itemHeight + spacing));
 321
 322     m_controller->setZoomInPossible(isZoomInPossible());
 323     m_controller->setZoomOutPossible(isZoomOutPossible());
 324 }
 325
 326 #include "dolphiniconsview.moc"