X-Git-Url: https://cloud.milkyroute.net/gitweb/dolphin.git/blobdiff_plain/71ccc7e36139dbd4c9beb2b1142d555d256feb6a..2f0ceedae088158b8af24a5e94500a7d1c0edecb:/src/kitemviews/kitemlistcontroller.cpp

diff --git a/src/kitemviews/kitemlistcontroller.cpp b/src/kitemviews/kitemlistcontroller.cpp
index 91fb86806..92a14b23d 100644
--- a/src/kitemviews/kitemlistcontroller.cpp
+++ b/src/kitemviews/kitemlistcontroller.cpp
@@ -23,11 +23,12 @@
 #include "kitemlistcontroller.h"
 
 #include "kitemlistview.h"
+#include "kitemlistrubberband_p.h"
 #include "kitemlistselectionmanager.h"
 
+#include <QApplication>
 #include <QEvent>
 #include <QGraphicsSceneEvent>
-#include <QTransform>
 
 #include <KDebug>
 
@@ -80,11 +81,16 @@ void KItemListController::setView(KItemListView* view)
     }
 
     KItemListView* oldView = m_view;
+    if (oldView) {
+        disconnect(oldView, SIGNAL(offsetChanged(qreal,qreal)), this, SLOT(slotViewOffsetChanged(qreal,qreal)));
+    }
+
     m_view = view;
 
     if (m_view) {
         m_view->setController(this);
         m_view->setModel(m_model);
+        connect(m_view, SIGNAL(offsetChanged(qreal,qreal)), this, SLOT(slotViewOffsetChanged(qreal,qreal)));
     }
 
     emit viewChanged(m_view, oldView);
@@ -119,8 +125,100 @@ bool KItemListController::hideEvent(QHideEvent* event)
 
 bool KItemListController::keyPressEvent(QKeyEvent* event)
 {
-    Q_UNUSED(event);
-    return false;
+    const bool shiftPressed = event->modifiers() & Qt::ShiftModifier;
+    const bool controlPressed = event->modifiers() & Qt::ControlModifier;
+    const bool shiftOrControlPressed = shiftPressed || controlPressed;
+
+    int index = m_selectionManager->currentItem();
+    const int itemCount = m_model->count();
+    const int itemsPerRow = m_view->itemsPerOffset();
+
+    // For horizontal scroll orientation, transform
+    // the arrow keys to simplify the event handling.
+    int key = event->key();
+    if (m_view->scrollOrientation() == Qt::Horizontal) {
+        switch (key) {
+        case Qt::Key_Up:    key = Qt::Key_Left; break;
+        case Qt::Key_Down:  key = Qt::Key_Right; break;
+        case Qt::Key_Left:  key = Qt::Key_Up; break;
+        case Qt::Key_Right: key = Qt::Key_Down; break;
+        default:            break;
+        }
+    }
+
+    switch (key) {
+    case Qt::Key_Home:
+        index = 0;
+        break;
+
+    case Qt::Key_End:
+        index = itemCount - 1;
+        break;
+
+    case Qt::Key_Left:
+        if (index > 0) {
+            index--;
+        }
+        break;
+
+    case Qt::Key_Right:
+        if (index < itemCount - 1) {
+            index++;
+        }
+        break;
+
+    case Qt::Key_Up:
+        if (index >= itemsPerRow) {
+            index -= itemsPerRow;
+        }
+        break;
+
+    case Qt::Key_Down:
+        if (index + itemsPerRow < itemCount) {
+            // We are not in the last row yet.
+            index += itemsPerRow;
+        }
+        else {
+            // We are either in the last row already, or we are in the second-last row,
+            // and there is no item below the current item.
+            // In the latter case, we jump to the very last item.
+            const int currentColumn = index % itemsPerRow;
+            const int lastItemColumn = (itemCount - 1) % itemsPerRow;
+            const bool inLastRow = currentColumn < lastItemColumn;
+            if (!inLastRow) {
+                index = itemCount - 1;
+            }
+        }
+        break;
+
+    case Qt::Key_Space:
+        if (controlPressed) {
+            m_selectionManager->endAnchoredSelection();
+            m_selectionManager->setSelected(index, 1, KItemListSelectionManager::Toggle);
+            m_selectionManager->beginAnchoredSelection(index);
+        }
+
+    default:
+        break;
+    }
+
+    if (m_selectionManager->currentItem() != index) {
+        if (controlPressed) {
+            m_selectionManager->endAnchoredSelection();
+        }
+
+        m_selectionManager->setCurrentItem(index);
+
+        if (!shiftOrControlPressed || m_selectionBehavior == SingleSelection) {
+            m_selectionManager->clearSelection();
+            m_selectionManager->setSelected(index, 1);
+        }
+
+        if (!shiftPressed) {
+            m_selectionManager->beginAnchoredSelection(index);
+        }
+    }
+    return true;
 }
 
 bool KItemListController::inputMethodEvent(QInputMethodEvent* event)
@@ -131,38 +229,142 @@ bool KItemListController::inputMethodEvent(QInputMethodEvent* event)
 
 bool KItemListController::mousePressEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 {
-    Q_UNUSED(event);
-    Q_UNUSED(transform);
+    if (!m_view) {
+        return false;
+    }
+
     const QPointF pos = transform.map(event->pos());
     m_pressedIndex = m_view->itemAt(pos);
+
+    if (m_view->isAboveExpansionToggle(m_pressedIndex, pos)) {
+        return true;
+    }
+
+    const bool shiftPressed = event->modifiers() & Qt::ShiftModifier;
+    const bool controlPressed = event->modifiers() & Qt::ControlModifier;
+    const bool shiftOrControlPressed = shiftPressed || controlPressed;
+
+    if (!shiftOrControlPressed || m_selectionBehavior == SingleSelection) {
+        m_selectionManager->clearSelection();
+    }
+
+    if (!shiftPressed) {
+        // Finish the anchored selection before the current index is changed
+        m_selectionManager->endAnchoredSelection();
+    }
+
+    if (m_pressedIndex >= 0) {
+        m_selectionManager->setCurrentItem(m_pressedIndex);
+
+        switch (m_selectionBehavior) {
+        case NoSelection:
+            break;
+
+        case SingleSelection:
+            m_selectionManager->setSelected(m_pressedIndex);
+            break;
+
+        case MultiSelection:
+            if (controlPressed) {
+                m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Toggle);
+                m_selectionManager->beginAnchoredSelection(m_pressedIndex);
+            } else if (!shiftPressed || !m_selectionManager->isAnchoredSelectionActive()) {
+                // Select the pressed item and start a new anchored selection
+                m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Select);
+                m_selectionManager->beginAnchoredSelection(m_pressedIndex);
+            }
+            break;
+
+        default:
+            Q_ASSERT(false);
+            break;
+        }
+
+        return true;
+    } else {
+        KItemListRubberBand* rubberBand = m_view->rubberBand();
+        QPointF startPos = pos;
+        if (m_view->scrollOrientation() == Qt::Vertical) {
+            startPos.ry() += m_view->offset();
+            if (m_view->itemSize().width() < 0) {
+                // Use a special rubberband for views that have only one column and
+                // expand the rubberband to use the whole width of the view.
+                startPos.setX(0);
+            }
+        } else {
+            startPos.rx() += m_view->offset();
+        }
+        rubberBand->setStartPosition(startPos);
+        rubberBand->setEndPosition(startPos);
+        rubberBand->setActive(true);
+        connect(rubberBand, SIGNAL(endPositionChanged(QPointF,QPointF)), this, SLOT(slotRubberBandChanged()));
+    }
+
     return false;
 }
 
 bool KItemListController::mouseMoveEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 {
-    Q_UNUSED(event);
-    Q_UNUSED(transform);
+    if (!m_view) {
+        return false;
+    }
+
+    KItemListRubberBand* rubberBand = m_view->rubberBand();
+    if (rubberBand->isActive()) {
+        QPointF endPos = transform.map(event->pos());
+        if (m_view->scrollOrientation() == Qt::Vertical) {
+            endPos.ry() += m_view->offset();
+            if (m_view->itemSize().width() < 0) {
+                // Use a special rubberband for views that have only one column and
+                // expand the rubberband to use the whole width of the view.
+                endPos.setX(m_view->size().width());
+            }
+        } else {
+            endPos.rx() += m_view->offset();
+        }
+        rubberBand->setEndPosition(endPos);
+    }
+
     return false;
 }
 
 bool KItemListController::mouseReleaseEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 {
-    if (m_view) {
-        const QPointF pos = transform.map(event->pos());
-        const int index = m_view->itemAt(pos);
-        if (index >= 0 && index == m_pressedIndex) {
-            bool emitItemClicked = true;
-            if (event->button() & Qt::LeftButton) {
-                if (m_view->isAboveExpansionToggle(index, pos)) {
-                    emit itemExpansionToggleClicked(index);
-                    emitItemClicked = false;
-                }
-            }
+    if (!m_view) {
+        return false;
+    }
+
+    KItemListRubberBand* rubberBand = m_view->rubberBand();
+    if (rubberBand->isActive()) {
+        disconnect(rubberBand, SIGNAL(endPositionChanged(QPointF,QPointF)), this, SLOT(slotRubberBandChanged()));
+        rubberBand->setActive(false);
+        m_pressedIndex = -1;
+        return false;
+    }
 
-            if (emitItemClicked) {
-                emit itemClicked(index, event->button());
+    const QPointF pos = transform.map(event->pos());
+    const int index = m_view->itemAt(pos);
+    const bool shiftOrControlPressed = event->modifiers() & Qt::ShiftModifier || event->modifiers() & Qt::ControlModifier;
+
+    if (index >= 0 && index == m_pressedIndex) {
+        // The release event is done above the same item as the press event
+        bool emitItemClicked = true;
+        if (event->button() & Qt::LeftButton) {
+            if (m_view->isAboveExpansionToggle(index, pos)) {
+                emit itemExpansionToggleClicked(index);
+                emitItemClicked = false;
+            }
+            else if (shiftOrControlPressed) {
+                // The mouse click should only update the selection, not trigger the item
+                emitItemClicked = false;
             }
         }
+
+        if (emitItemClicked) {
+            emit itemClicked(index, event->button());
+        }
+    } else if (!shiftOrControlPressed) {
+        m_selectionManager->clearSelection();
     }
 
     m_pressedIndex = -1;
@@ -213,8 +415,49 @@ bool KItemListController::hoverEnterEvent(QGraphicsSceneHoverEvent* event, const
 
 bool KItemListController::hoverMoveEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
 {
-    Q_UNUSED(event);
+    // The implementation assumes that only one item can get hovered no matter
+    // whether they overlap or not.
+
     Q_UNUSED(transform);
+    if (!m_model || !m_view) {
+        return false;
+    }
+
+    // Search the previously hovered item that might get unhovered
+    KItemListWidget* unhoveredWidget = 0;
+    foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
+        if (widget->isHovered()) {
+            unhoveredWidget = widget;
+            break;
+        }
+    }
+
+    // Search the currently hovered item
+    KItemListWidget* hoveredWidget = 0;
+    foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
+        const QPointF mappedPos = widget->mapFromItem(m_view, event->pos());
+
+        const bool hovered = widget->contains(mappedPos) &&
+                             !widget->expansionToggleRect().contains(mappedPos) &&
+                             !widget->selectionToggleRect().contains(mappedPos);
+        if (hovered) {
+            hoveredWidget = widget;
+            break;
+        }
+    }
+
+    if (unhoveredWidget != hoveredWidget) {
+        if (unhoveredWidget) {
+            unhoveredWidget->setHovered(false);
+            emit itemUnhovered(unhoveredWidget->index());
+        }
+
+        if (hoveredWidget) {
+            hoveredWidget->setHovered(true);
+            emit itemHovered(hoveredWidget->index());
+        }
+    }
+
     return false;
 }
 
@@ -222,6 +465,17 @@ bool KItemListController::hoverLeaveEvent(QGraphicsSceneHoverEvent* event, const
 {
     Q_UNUSED(event);
     Q_UNUSED(transform);
+
+    if (!m_model || !m_view) {
+        return false;
+    }
+
+    foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
+        if (widget->isHovered()) {
+            widget->setHovered(false);
+            emit itemUnhovered(widget->index());
+        }
+    }
     return false;
 }
 
@@ -246,9 +500,6 @@ bool KItemListController::processEvent(QEvent* event, const QTransform& transfor
     }
 
     switch (event->type()) {
-//  case QEvent::FocusIn:
-//  case QEvent::FocusOut:
-//      return focusEvent(static_cast<QFocusEvent*>(event));
     case QEvent::KeyPress:
         return keyPressEvent(static_cast<QKeyEvent*>(event));
     case QEvent::InputMethod:
@@ -284,4 +535,103 @@ bool KItemListController::processEvent(QEvent* event, const QTransform& transfor
     return false;
 }
 
+void KItemListController::slotViewOffsetChanged(qreal current, qreal previous)
+{
+    if (!m_view) {
+        return;
+    }
+
+    KItemListRubberBand* rubberBand = m_view->rubberBand();
+    if (rubberBand->isActive()) {
+        const qreal diff = current - previous;
+        // TODO: Ideally just QCursor::pos() should be used as
+        // new end-position but it seems there is no easy way
+        // to have something like QWidget::mapFromGlobal() for QGraphicsWidget
+        // (... or I just missed an easy way to do the mapping)
+        QPointF endPos = rubberBand->endPosition();
+        if (m_view->scrollOrientation() == Qt::Vertical) {
+            endPos.ry() += diff;
+        } else {
+            endPos.rx() += diff;
+        }
+
+        rubberBand->setEndPosition(endPos);
+    }
+}
+
+void KItemListController::slotRubberBandChanged()
+{
+    if (!m_view || !m_model || m_model->count() <= 0) {
+        return;
+    }
+
+    const KItemListRubberBand* rubberBand = m_view->rubberBand();
+    const QPointF startPos = rubberBand->startPosition();
+    const QPointF endPos = rubberBand->endPosition();
+    QRectF rubberBandRect = QRectF(startPos, endPos).normalized();
+
+    const bool scrollVertical = (m_view->scrollOrientation() == Qt::Vertical);
+    if (scrollVertical) {
+        rubberBandRect.translate(0, -m_view->offset());
+    } else {
+        rubberBandRect.translate(-m_view->offset(), 0);
+    }
+
+    QSet<int> previousSelectedItems;
+    if (m_selectionManager->hasSelection()) {
+        // Don't clear the current selection in case if the user pressed the
+        // Shift- or Control-key during the rubberband selection
+        const bool shiftOrControlPressed = QApplication::keyboardModifiers() & Qt::ShiftModifier ||
+                                           QApplication::keyboardModifiers() & Qt::ControlModifier;
+        if (shiftOrControlPressed) {
+            previousSelectedItems = m_selectionManager->selectedItems();
+        }
+    }
+
+    QSet<int> selectedItems;
+
+    // Select all visible items that intersect with the rubberband
+    foreach (const KItemListWidget* widget, m_view->visibleItemListWidgets()) {
+        const int index = widget->index();
+
+        const QRectF widgetRect = m_view->itemBoundingRect(index);
+        if (widgetRect.intersects(rubberBandRect)) {
+            const QRectF iconRect = widget->iconBoundingRect().translated(widgetRect.topLeft());
+            const QRectF textRect = widget->textBoundingRect().translated(widgetRect.topLeft());
+            if (iconRect.intersects(rubberBandRect) || textRect.intersects(rubberBandRect)) {
+                selectedItems.insert(index);
+            }
+        }
+    }
+
+    // Select all invisible items that intersect with the rubberband. Instead of
+    // iterating all items only the area which might be touched by the rubberband
+    // will be checked.
+    const bool increaseIndex = scrollVertical ?
+                               startPos.y() > endPos.y(): startPos.x() > endPos.x();
+
+    int index = increaseIndex ? m_view->lastVisibleIndex() + 1 : m_view->firstVisibleIndex() - 1;
+    bool selectionFinished = false;
+    do {
+        const QRectF widgetRect = m_view->itemBoundingRect(index);
+        if (widgetRect.intersects(rubberBandRect)) {
+            selectedItems.insert(index);
+        }
+
+        if (increaseIndex) {
+            ++index;
+            selectionFinished = (index >= m_model->count()) ||
+                                ( scrollVertical && widgetRect.top()  > rubberBandRect.bottom()) ||
+                                (!scrollVertical && widgetRect.left() > rubberBandRect.right());
+        } else {
+            --index;
+            selectionFinished = (index < 0) ||
+                                ( scrollVertical && widgetRect.bottom() < rubberBandRect.top()) ||
+                                (!scrollVertical && widgetRect.right()  < rubberBandRect.left());
+        }
+    } while (!selectionFinished);
+
+    m_selectionManager->setSelectedItems(selectedItems + previousSelectedItems);
+}
+
 #include "kitemlistcontroller.moc"