src/kitemviews/kitemlistcontroller.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2011 by Peter Penz <peter.penz19@gmail.com>             *
   3  *                                                                         *
   4  *   Based on the Itemviews NG project from Trolltech Labs:                *
   5  *   http://qt.gitorious.org/qt-labs/itemviews-ng                          *
   6  *                                                                         *
   7  *   This program is free software; you can redistribute it and/or modify  *
   8  *   it under the terms of the GNU General Public License as published by  *
   9  *   the Free Software Foundation; either version 2 of the License, or     *
  10  *   (at your option) any later version.                                   *
  11  *                                                                         *
  12  *   This program is distributed in the hope that it will be useful,       *
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  15  *   GNU General Public License for more details.                          *
  16  *                                                                         *
  17  *   You should have received a copy of the GNU General Public License     *
  18  *   along with this program; if not, write to the                         *
  19  *   Free Software Foundation, Inc.,                                       *
  20  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  21  ***************************************************************************/
  22
  23 #include "kitemlistcontroller.h"
  24
  25 #include "kitemlistview.h"
  26 #include "kitemlistselectionmanager.h"
  27
  28 #include <QEvent>
  29 #include <QGraphicsSceneEvent>
  30 #include <QTransform>
  31
  32 #include <KDebug>
  33
  34 KItemListController::KItemListController(QObject* parent) :
  35     QObject(parent),
  36     m_selectionBehavior(NoSelection),
  37     m_model(0),
  38     m_view(0),
  39     m_selectionManager(new KItemListSelectionManager(this)),
  40     m_pressedIndex(-1)
  41 {
  42 }
  43
  44 KItemListController::~KItemListController()
  45 {
  46 }
  47
  48 void KItemListController::setModel(KItemModelBase* model)
  49 {
  50     if (m_model == model) {
  51         return;
  52     }
  53
  54     KItemModelBase* oldModel = m_model;
  55     m_model = model;
  56
  57     if (m_view) {
  58         m_view->setModel(m_model);
  59     }
  60
  61     m_selectionManager->setModel(m_model);
  62
  63     emit modelChanged(m_model, oldModel);
  64 }
  65
  66 KItemModelBase* KItemListController::model() const
  67 {
  68     return m_model;
  69 }
  70
  71 KItemListSelectionManager* KItemListController::selectionManager() const
  72 {
  73     return m_selectionManager;
  74 }
  75
  76 void KItemListController::setView(KItemListView* view)
  77 {
  78     if (m_view == view) {
  79         return;
  80     }
  81
  82     KItemListView* oldView = m_view;
  83     m_view = view;
  84
  85     if (m_view) {
  86         m_view->setController(this);
  87         m_view->setModel(m_model);
  88     }
  89
  90     emit viewChanged(m_view, oldView);
  91 }
  92
  93 KItemListView* KItemListController::view() const
  94 {
  95     return m_view;
  96 }
  97
  98 void KItemListController::setSelectionBehavior(SelectionBehavior behavior)
  99 {
 100     m_selectionBehavior = behavior;
 101 }
 102
 103 KItemListController::SelectionBehavior KItemListController::selectionBehavior() const
 104 {
 105     return m_selectionBehavior;
 106 }
 107
 108 bool KItemListController::showEvent(QShowEvent* event)
 109 {
 110     Q_UNUSED(event);
 111     return false;
 112 }
 113
 114 bool KItemListController::hideEvent(QHideEvent* event)
 115 {
 116     Q_UNUSED(event);
 117     return false;
 118 }
 119
 120 bool KItemListController::keyPressEvent(QKeyEvent* event)
 121 {
 122     Q_UNUSED(event);
 123     return false;
 124 }
 125
 126 bool KItemListController::inputMethodEvent(QInputMethodEvent* event)
 127 {
 128     Q_UNUSED(event);
 129     return false;
 130 }
 131
 132 bool KItemListController::mousePressEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 133 {
 134     const QPointF pos = transform.map(event->pos());
 135     m_pressedIndex = m_view->itemAt(pos);
 136
 137     m_selectionManager->setCurrentItem(m_pressedIndex);
 138
 139     // The anchor for the current selection is updated except for Shift+LeftButton events
 140     // (the current selection is continued with the previous anchor in that case).
 141     if (!(event->buttons() & Qt::LeftButton && event->modifiers() & Qt::ShiftModifier)) {
 142         m_selectionManager->setAnchorItem(m_pressedIndex);
 143     }
 144
 145     return false;
 146 }
 147
 148 bool KItemListController::mouseMoveEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 149 {
 150     Q_UNUSED(event);
 151     Q_UNUSED(transform);
 152     return false;
 153 }
 154
 155 bool KItemListController::mouseReleaseEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 156 {
 157     if (m_view) {
 158         const QPointF pos = transform.map(event->pos());
 159         const int index = m_view->itemAt(pos);
 160         if (index >= 0 && index == m_pressedIndex) {
 161             bool emitItemClicked = true;
 162             if (event->button() & Qt::LeftButton) {
 163                 if (m_view->isAboveExpansionToggle(index, pos)) {
 164                     emit itemExpansionToggleClicked(index);
 165                     emitItemClicked = false;
 166                 }
 167                 else if (event->modifiers() & Qt::ShiftModifier || event->modifiers() & Qt::ControlModifier) {
 168                     // The mouse click should only update the selection, not trigger the item.
 169                     emitItemClicked = false;
 170                 }
 171             }
 172
 173             if (emitItemClicked) {
 174                 emit itemClicked(index, event->button());
 175             }
 176         }
 177     }
 178
 179     m_pressedIndex = -1;
 180     return false;
 181 }
 182
 183 bool KItemListController::mouseDoubleClickEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 184 {
 185     Q_UNUSED(event);
 186     Q_UNUSED(transform);
 187     return false;
 188 }
 189
 190 bool KItemListController::dragEnterEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 191 {
 192     Q_UNUSED(event);
 193     Q_UNUSED(transform);
 194     return false;
 195 }
 196
 197 bool KItemListController::dragLeaveEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 198 {
 199     Q_UNUSED(event);
 200     Q_UNUSED(transform);
 201     return false;
 202 }
 203
 204 bool KItemListController::dragMoveEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 205 {
 206     Q_UNUSED(event);
 207     Q_UNUSED(transform);
 208     return false;
 209 }
 210
 211 bool KItemListController::dropEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 212 {
 213     Q_UNUSED(event);
 214     Q_UNUSED(transform);
 215     return false;
 216 }
 217
 218 bool KItemListController::hoverEnterEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
 219 {
 220     Q_UNUSED(event);
 221     Q_UNUSED(transform);
 222     return false;
 223 }
 224
 225 bool KItemListController::hoverMoveEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
 226 {
 227     Q_UNUSED(event);
 228     Q_UNUSED(transform);
 229     return false;
 230 }
 231
 232 bool KItemListController::hoverLeaveEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
 233 {
 234     Q_UNUSED(event);
 235     Q_UNUSED(transform);
 236     return false;
 237 }
 238
 239 bool KItemListController::wheelEvent(QGraphicsSceneWheelEvent* event, const QTransform& transform)
 240 {
 241     Q_UNUSED(event);
 242     Q_UNUSED(transform);
 243     return false;
 244 }
 245
 246 bool KItemListController::resizeEvent(QGraphicsSceneResizeEvent* event, const QTransform& transform)
 247 {
 248     Q_UNUSED(event);
 249     Q_UNUSED(transform);
 250     return false;
 251 }
 252
 253 bool KItemListController::processEvent(QEvent* event, const QTransform& transform)
 254 {
 255     if (!event) {
 256         return false;
 257     }
 258
 259     switch (event->type()) {
 260 //  case QEvent::FocusIn:
 261 //  case QEvent::FocusOut:
 262 //      return focusEvent(static_cast<QFocusEvent*>(event));
 263     case QEvent::KeyPress:
 264         return keyPressEvent(static_cast<QKeyEvent*>(event));
 265     case QEvent::InputMethod:
 266         return inputMethodEvent(static_cast<QInputMethodEvent*>(event));
 267     case QEvent::GraphicsSceneMousePress:
 268         return mousePressEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
 269     case QEvent::GraphicsSceneMouseMove:
 270         return mouseMoveEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
 271     case QEvent::GraphicsSceneMouseRelease:
 272         return mouseReleaseEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
 273     case QEvent::GraphicsSceneWheel:
 274          return wheelEvent(static_cast<QGraphicsSceneWheelEvent*>(event), QTransform());
 275     case QEvent::GraphicsSceneDragEnter:
 276         return dragEnterEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
 277     case QEvent::GraphicsSceneDragLeave:
 278         return dragLeaveEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
 279     case QEvent::GraphicsSceneDragMove:
 280         return dragMoveEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
 281     case QEvent::GraphicsSceneDrop:
 282         return dropEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
 283     case QEvent::GraphicsSceneHoverEnter:
 284         return hoverEnterEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
 285     case QEvent::GraphicsSceneHoverMove:
 286         return hoverMoveEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
 287     case QEvent::GraphicsSceneHoverLeave:
 288         return hoverLeaveEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
 289     case QEvent::GraphicsSceneResize:
 290         return resizeEvent(static_cast<QGraphicsSceneResizeEvent*>(event), transform);
 291     default:
 292         break;
 293     }
 294
 295     return false;
 296 }
 297
 298 #include "kitemlistcontroller.moc"