src/dolphincolumnviewcontainer.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2007-2009 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 "dolphincolumnviewcontainer.h"
  21
  22 #include "dolphincolumnview.h"
  23 #include "dolphincontroller.h"
  24 #include "dolphinsortfilterproxymodel.h"
  25 #include "settings/dolphinsettings.h"
  26
  27 #include "dolphin_columnmodesettings.h"
  28
  29 #include <kfilepreviewgenerator.h>
  30
  31 #include <QPoint>
  32 #include <QScrollBar>
  33 #include <QTimeLine>
  34
  35 DolphinColumnViewContainer::DolphinColumnViewContainer(QWidget* parent, DolphinController* controller) :
  36     QScrollArea(parent),
  37     m_controller(controller),
  38     m_active(false),
  39     m_index(-1),
  40     m_contentX(0),
  41     m_columns(),
  42     m_emptyViewport(0),
  43     m_animation(0),
  44     m_nameFilter()
  45 {
  46     Q_ASSERT(controller != 0);
  47
  48     setAcceptDrops(true);
  49     setFocusPolicy(Qt::NoFocus);
  50     setFrameShape(QFrame::NoFrame);
  51     setLayoutDirection(Qt::LeftToRight);
  52
  53     connect(this, SIGNAL(viewportEntered()),
  54             controller, SLOT(emitViewportEntered()));
  55     connect(controller, SIGNAL(activationChanged(bool)),
  56             this, SLOT(updateColumnsBackground(bool)));
  57
  58     connect(horizontalScrollBar(), SIGNAL(valueChanged(int)),
  59             this, SLOT(moveContentHorizontally(int)));
  60
  61     m_animation = new QTimeLine(500, this);
  62     connect(m_animation, SIGNAL(frameChanged(int)), horizontalScrollBar(), SLOT(setValue(int)));
  63
  64     DolphinColumnView* column = new DolphinColumnView(viewport(), this, m_controller->url());
  65     m_columns.append(column);
  66     setActiveColumnIndex(0);
  67
  68     m_emptyViewport = new QFrame(viewport());
  69     m_emptyViewport->setFrameStyle(QFrame::StyledPanel | QFrame::Sunken);
  70
  71     updateColumnsBackground(true);
  72 }
  73
  74 DolphinColumnViewContainer::~DolphinColumnViewContainer()
  75 {
  76 }
  77
  78 void DolphinColumnViewContainer::setNameFilter(const QString& nameFilter)
  79 {
  80     if (nameFilter != m_nameFilter) {
  81         m_nameFilter = nameFilter;
  82         foreach (DolphinColumnView* column, m_columns) {
  83             DolphinSortFilterProxyModel* proxyModel = static_cast<DolphinSortFilterProxyModel*>(column->model());
  84             proxyModel->setFilterRegExp(nameFilter);
  85         }
  86     }
  87 }
  88
  89 QString DolphinColumnViewContainer::nameFilter() const
  90 {
  91     return m_nameFilter;
  92 }
  93
  94 KUrl DolphinColumnViewContainer::rootUrl() const
  95 {
  96     return m_columns[0]->url();
  97 }
  98
  99 QAbstractItemView* DolphinColumnViewContainer::activeColumn() const
 100 {
 101     return m_columns[m_index];
 102 }
 103
 104 bool DolphinColumnViewContainer::showColumn(const KUrl& url)
 105 {
 106     if (!rootUrl().isParentOf(url)) {
 107         removeAllColumns();
 108         m_columns[0]->setUrl(url);
 109         return false;
 110     }
 111
 112     int columnIndex = 0;
 113     foreach (DolphinColumnView* column, m_columns) {
 114         if (column->url() == url) {
 115             // the column represents already the requested URL, hence activate it
 116             requestActivation(column);
 117             layoutColumns();
 118             return false;
 119         } else if (!column->url().isParentOf(url)) {
 120             // the column is no parent of the requested URL, hence
 121             // just delete all remaining columns
 122             if (columnIndex > 0) {
 123                 QList<DolphinColumnView*>::iterator start = m_columns.begin() + columnIndex;
 124                 QList<DolphinColumnView*>::iterator end = m_columns.end();
 125                 for (QList<DolphinColumnView*>::iterator it = start; it != end; ++it) {
 126                     deleteColumn(*it);
 127                 }
 128                 m_columns.erase(start, end);
 129
 130                 const int maxIndex = m_columns.count() - 1;
 131                 Q_ASSERT(maxIndex >= 0);
 132                 if (m_index > maxIndex) {
 133                     m_index = maxIndex;
 134                 }
 135                 break;
 136             }
 137         }
 138         ++columnIndex;
 139     }
 140
 141     // Create missing columns. Assuming that the path is "/home/peter/Temp/" and
 142     // the target path is "/home/peter/Temp/a/b/c/", then the columns "a", "b" and
 143     // "c" will be created.
 144     const int lastIndex = m_columns.count() - 1;
 145     Q_ASSERT(lastIndex >= 0);
 146
 147     const KUrl& activeUrl = m_columns[lastIndex]->url();
 148     Q_ASSERT(activeUrl.isParentOf(url));
 149     Q_ASSERT(activeUrl != url);
 150
 151     QString path = activeUrl.url(KUrl::AddTrailingSlash);
 152     const QString targetPath = url.url(KUrl::AddTrailingSlash);
 153
 154     columnIndex = lastIndex;
 155     int slashIndex = path.count('/');
 156     bool hasSubPath = (slashIndex >= 0);
 157     while (hasSubPath) {
 158         const QString subPath = targetPath.section('/', slashIndex, slashIndex);
 159         if (subPath.isEmpty()) {
 160             hasSubPath = false;
 161         } else {
 162             path += subPath + '/';
 163             ++slashIndex;
 164
 165             const KUrl childUrl = KUrl(path);
 166             m_columns[columnIndex]->setChildUrl(childUrl);
 167             columnIndex++;
 168
 169             DolphinColumnView* column = new DolphinColumnView(viewport(), this, childUrl);
 170             if (!m_nameFilter.isEmpty()) {
 171                 DolphinSortFilterProxyModel* proxyModel = static_cast<DolphinSortFilterProxyModel*>(column->model());
 172                 proxyModel->setFilterRegExp(m_nameFilter);
 173             }
 174             column->setActive(false);
 175
 176             m_columns.append(column);
 177
 178             // Before invoking layoutColumns() the column must be set visible temporary.
 179             // To prevent a flickering the initial geometry is set to a hidden position.
 180             column->setGeometry(QRect(-1, -1, 1, 1));
 181             column->show();
 182             layoutColumns();
 183             updateScrollBar();
 184         }
 185     }
 186
 187     // set the last column as active column without modifying the controller
 188     // and hence the history
 189     m_columns[m_index]->setActive(false);
 190     m_index = columnIndex;
 191     m_columns[m_index]->setActive(true);
 192     assureVisibleActiveColumn();
 193
 194     return true;
 195 }
 196
 197 void DolphinColumnViewContainer::mousePressEvent(QMouseEvent* event)
 198 {
 199     m_controller->requestActivation();
 200     QScrollArea::mousePressEvent(event);
 201 }
 202
 203 void DolphinColumnViewContainer::resizeEvent(QResizeEvent* event)
 204 {
 205     QScrollArea::resizeEvent(event);
 206     layoutColumns();
 207     updateScrollBar();
 208     assureVisibleActiveColumn();
 209 }
 210
 211 void DolphinColumnViewContainer::wheelEvent(QWheelEvent* event)
 212 {
 213     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 214     if ((event->modifiers() & Qt::ControlModifier) == Qt::ControlModifier) {
 215         event->ignore();
 216     } else {
 217         QScrollArea::wheelEvent(event);
 218     }
 219 }
 220
 221 void DolphinColumnViewContainer::moveContentHorizontally(int x)
 222 {
 223     m_contentX = isRightToLeft() ? +x : -x;
 224     layoutColumns();
 225 }
 226
 227 void DolphinColumnViewContainer::updateColumnsBackground(bool active)
 228 {
 229     if (active == m_active) {
 230         return;
 231     }
 232
 233     m_active = active;
 234
 235     // dim the background of the viewport
 236     const QPalette::ColorRole role = viewport()->backgroundRole();
 237     QColor background = viewport()->palette().color(role);
 238     background.setAlpha(0);  // make background transparent
 239
 240     QPalette palette = viewport()->palette();
 241     palette.setColor(role, background);
 242     viewport()->setPalette(palette);
 243
 244     foreach (DolphinColumnView* column, m_columns) {
 245         column->updateBackground();
 246     }
 247 }
 248
 249 void DolphinColumnViewContainer::setActiveColumnIndex(int index)
 250 {
 251     if (m_index == index) {
 252         return;
 253     }
 254
 255     const bool hasActiveColumn = (m_index >= 0);
 256     if (hasActiveColumn) {
 257         m_columns[m_index]->setActive(false);
 258     }
 259
 260     m_index = index;
 261     m_columns[m_index]->setActive(true);
 262
 263     assureVisibleActiveColumn();
 264 }
 265
 266 void DolphinColumnViewContainer::layoutColumns()
 267 {
 268     const int gap = 4;
 269
 270     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 271     const int columnWidth = settings->columnWidth();
 272
 273     QRect emptyViewportRect;
 274     if (isRightToLeft()) {
 275         int x = viewport()->width() - columnWidth + m_contentX;
 276         foreach (DolphinColumnView* column, m_columns) {
 277             column->setGeometry(QRect(x, 0, columnWidth - gap, viewport()->height()));
 278             x -= columnWidth;
 279         }
 280         emptyViewportRect = QRect(0, 0, x + columnWidth - gap, viewport()->height());
 281     } else {
 282         int x = m_contentX;
 283         foreach (DolphinColumnView* column, m_columns) {
 284             column->setGeometry(QRect(x, 0, columnWidth - gap, viewport()->height()));
 285             x += columnWidth;
 286         }
 287         emptyViewportRect = QRect(x, 0, viewport()->width() - x - gap, viewport()->height());
 288     }
 289
 290     if (emptyViewportRect.isValid()) {
 291         m_emptyViewport->show();
 292         m_emptyViewport->setGeometry(emptyViewportRect);
 293     } else {
 294         m_emptyViewport->hide();
 295     }
 296 }
 297
 298 void DolphinColumnViewContainer::updateScrollBar()
 299 {
 300     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 301     const int contentWidth = m_columns.count() * settings->columnWidth();
 302
 303     horizontalScrollBar()->setPageStep(contentWidth);
 304     horizontalScrollBar()->setRange(0, contentWidth - viewport()->width());
 305 }
 306
 307 void DolphinColumnViewContainer::assureVisibleActiveColumn()
 308 {
 309     const int viewportWidth = viewport()->width();
 310     const int x = activeColumn()->x();
 311
 312     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 313     const int width = settings->columnWidth();
 314
 315     if (x + width > viewportWidth) {
 316         const int newContentX = m_contentX - x - width + viewportWidth;
 317         if (isRightToLeft()) {
 318             m_animation->setFrameRange(m_contentX, newContentX);
 319         } else {
 320             m_animation->setFrameRange(-m_contentX, -newContentX);
 321         }
 322         if (m_animation->state() != QTimeLine::Running) {
 323            m_animation->start();
 324         }
 325     } else if (x < 0) {
 326         const int newContentX = m_contentX - x;
 327         if (isRightToLeft()) {
 328             m_animation->setFrameRange(m_contentX, newContentX);
 329         } else {
 330             m_animation->setFrameRange(-m_contentX, -newContentX);
 331         }
 332         if (m_animation->state() != QTimeLine::Running) {
 333            m_animation->start();
 334         }
 335     }
 336 }
 337
 338 void DolphinColumnViewContainer::requestActivation(DolphinColumnView* column)
 339 {
 340     m_controller->setItemView(column);
 341     if (column->isActive()) {
 342         assureVisibleActiveColumn();
 343     } else {
 344         int index = 0;
 345         foreach (DolphinColumnView* currColumn, m_columns) {
 346             if (currColumn == column) {
 347                 setActiveColumnIndex(index);
 348                 return;
 349             }
 350             ++index;
 351         }
 352     }
 353 }
 354
 355 void DolphinColumnViewContainer::removeAllColumns()
 356 {
 357     QList<DolphinColumnView*>::iterator start = m_columns.begin() + 1;
 358     QList<DolphinColumnView*>::iterator end = m_columns.end();
 359     for (QList<DolphinColumnView*>::iterator it = start; it != end; ++it) {
 360         deleteColumn(*it);
 361     }
 362     m_columns.erase(start, end);
 363     m_index = 0;
 364     m_columns[0]->setActive(true);
 365     assureVisibleActiveColumn();
 366 }
 367
 368 QPoint DolphinColumnViewContainer::columnPosition(DolphinColumnView* column, const QPoint& point) const
 369 {
 370     const QPoint topLeft = column->frameGeometry().topLeft();
 371     return QPoint(point.x() - topLeft.x(), point.y() - topLeft.y());
 372 }
 373
 374 void DolphinColumnViewContainer::deleteColumn(DolphinColumnView* column)
 375 {
 376     if (column != 0) {
 377         if (m_controller->itemView() == column) {
 378             m_controller->setItemView(0);
 379         }
 380         // deleteWhenNotDragSource(column) does not necessarily delete column,
 381         // and we want its preview generator destroyed immediately.
 382         column->m_previewGenerator->deleteLater();
 383         column->m_previewGenerator = 0;
 384         column->hide();
 385         // Prevent automatic destruction of column when this DolphinColumnViewContainer
 386         // is destroyed.
 387         column->setParent(0);
 388         column->disconnect();
 389         emit requestColumnDeletion(column);
 390     }
 391 }
 392
 393 #include "dolphincolumnviewcontainer.moc"