X-Git-Url: https://cloud.milkyroute.net/gitweb/dolphin.git/blobdiff_plain/ec38f1cdb641f0b277100edd92b268ec856e2ece..16e5740828a6f66c6437100f9e66c90bbee498d0:/src/kitemviews/kfileitemlistview.cpp

diff --git a/src/kitemviews/kfileitemlistview.cpp b/src/kitemviews/kfileitemlistview.cpp
index f1594b10b..11760fed1 100644
--- a/src/kitemviews/kfileitemlistview.cpp
+++ b/src/kitemviews/kfileitemlistview.cpp
@@ -19,20 +19,22 @@
 
 #include "kfileitemlistview.h"
 
-#include "kitemlistgroupheader.h"
+#include "kfileitemlistgroupheader.h"
 #include "kfileitemmodelrolesupdater.h"
 #include "kfileitemlistwidget.h"
 #include "kfileitemmodel.h"
+#include "kpixmapmodifier_p.h"
 #include <KLocale>
 #include <KStringHandler>
 
 #include <KDebug>
 #include <KIcon>
 
+#include <QPainter>
 #include <QTextLine>
 #include <QTimer>
 
-#define KFILEITEMLISTVIEW_DEBUG
+// #define KFILEITEMLISTVIEW_DEBUG
 
 namespace {
     const int ShortInterval = 50;
@@ -44,14 +46,13 @@ KFileItemListView::KFileItemListView(QGraphicsWidget* parent) :
     m_itemLayout(IconsLayout),
     m_modelRolesUpdater(0),
     m_updateVisibleIndexRangeTimer(0),
-    m_updateIconSizeTimer(0),
-    m_minimumRolesWidths()
+    m_updateIconSizeTimer(0)
 {
     setAcceptDrops(true);
 
     setScrollOrientation(Qt::Vertical);
     setWidgetCreator(new KItemListWidgetCreator<KFileItemListWidget>());
-    setGroupHeaderCreator(new KItemListGroupHeaderCreator<KItemListGroupHeader>());
+    setGroupHeaderCreator(new KItemListGroupHeaderCreator<KFileItemListGroupHeader>());
 
     m_updateVisibleIndexRangeTimer = new QTimer(this);
     m_updateVisibleIndexRangeTimer->setSingleShot(true);
@@ -63,13 +64,16 @@ KFileItemListView::KFileItemListView(QGraphicsWidget* parent) :
     m_updateIconSizeTimer->setInterval(ShortInterval);
     connect(m_updateIconSizeTimer, SIGNAL(timeout()), this, SLOT(updateIconSize()));
 
-    updateMinimumRolesWidths();
+    setVisibleRoles(QList<QByteArray>() << "name");
 }
 
 KFileItemListView::~KFileItemListView()
 {
-    delete widgetCreator();
+    // The group headers are children of the widgets created by
+    // widgetCreator(). So it is mandatory to delete the group headers
+    // first.
     delete groupHeaderCreator();
+    delete widgetCreator();
 
     delete m_modelRolesUpdater;
     m_modelRolesUpdater = 0;
@@ -78,19 +82,38 @@ KFileItemListView::~KFileItemListView()
 void KFileItemListView::setPreviewsShown(bool show)
 {
     if (m_modelRolesUpdater) {
-        m_modelRolesUpdater->setPreviewShown(show);
+        m_modelRolesUpdater->setPreviewsShown(show);
     }
 }
 
 bool KFileItemListView::previewsShown() const
 {
-    return m_modelRolesUpdater->isPreviewShown();
+    return m_modelRolesUpdater ? m_modelRolesUpdater->previewsShown() : false;
+}
+
+void KFileItemListView::setEnlargeSmallPreviews(bool enlarge)
+{
+    if (m_modelRolesUpdater) {
+        m_modelRolesUpdater->setEnlargeSmallPreviews(enlarge);
+    }
+}
+
+bool KFileItemListView::enlargeSmallPreviews() const
+{
+    return m_modelRolesUpdater ? m_modelRolesUpdater->enlargeSmallPreviews() : false;
 }
 
 void KFileItemListView::setItemLayout(Layout layout)
 {
     if (m_itemLayout != layout) {
+        const bool updateRoles = (m_itemLayout == DetailsLayout || layout == DetailsLayout);
         m_itemLayout = layout;
+        if (updateRoles) {
+            // The details-layout requires some invisible roles that
+            // must be added to the model if the new layout is "details".
+            // If the old layout was "details" the roles will get removed.
+            applyRolesToModel();
+        }
         updateLayoutOfVisibleItems();
     }
 }
@@ -100,157 +123,87 @@ KFileItemListView::Layout KFileItemListView::itemLayout() const
     return m_itemLayout;
 }
 
-QSizeF KFileItemListView::itemSizeHint(int index) const
+void KFileItemListView::setEnabledPlugins(const QStringList& list)
 {
-    const QHash<QByteArray, QVariant> values = model()->data(index);
-    const KItemListStyleOption& option = styleOption();
-    const int additionalRolesCount = qMax(visibleRoles().count() - 1, 0);
-
-    switch (m_itemLayout) {
-    case IconsLayout: {
-        const QString text = KStringHandler::preProcessWrap(values["name"].toString());
-
-        const qreal maxWidth = itemSize().width() - 2 * option.margin;
-        int textLinesCount = 0;
-        QTextLine line;
-
-        // Calculate the number of lines required for wrapping the name
-        QTextOption textOption(Qt::AlignHCenter);
-        textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
-
-        QTextLayout layout(text, option.font);
-        layout.setTextOption(textOption);
-        layout.beginLayout();
-        while ((line = layout.createLine()).isValid()) {
-            line.setLineWidth(maxWidth);
-            line.naturalTextWidth();
-            ++textLinesCount;
-        }
-        layout.endLayout();
-
-        // Add one line for each additional information
-        textLinesCount += additionalRolesCount;
-
-        const qreal height = textLinesCount * option.fontMetrics.height() +
-                             option.iconSize +
-                             option.margin * 4;
-        return QSizeF(itemSize().width(), height);
+    if (m_modelRolesUpdater) {
+        m_modelRolesUpdater->setEnabledPlugins(list);
     }
+}
 
-    case CompactLayout: {
-        // For each row exactly one role is shown. Calculate the maximum required width that is necessary
-        // to show all roles without horizontal clipping.
-        qreal maximumRequiredWidth = 0.0;
-
-        foreach (const QByteArray& role, visibleRoles()) {
-            const QString text = KFileItemListWidget::roleText(role, values);
-            const qreal requiredWidth = option.fontMetrics.width(text);
-            maximumRequiredWidth = qMax(maximumRequiredWidth, requiredWidth);
-        }
+QStringList KFileItemListView::enabledPlugins() const
+{
+    return m_modelRolesUpdater ? m_modelRolesUpdater->enabledPlugins() : QStringList();
+}
 
-        const qreal width = option.margin * 4 + option.iconSize + maximumRequiredWidth;
-        const qreal height = option.margin * 2 + qMax(option.iconSize, (1 + additionalRolesCount) * option.fontMetrics.height());
-        return QSizeF(width, height);
+QPixmap KFileItemListView::createDragPixmap(const QSet<int>& indexes) const
+{
+    if (!model()) {
+        return QPixmap();
     }
 
-    case DetailsLayout: {
-        // The width will be determined dynamically by KFileItemListView::visibleRoleSizes()
-        const qreal height = option.margin * 2 + qMax(option.iconSize, option.fontMetrics.height());
-        return QSizeF(-1, height);
+    const int itemCount = indexes.count();
+    Q_ASSERT(itemCount > 0);
+
+    // If more than one item is dragged, align the items inside a
+    // rectangular grid. The maximum grid size is limited to 5 x 5 items.
+    int xCount;
+    int size;
+    if (itemCount > 16) {
+        xCount = 5;
+        size = KIconLoader::SizeSmall;
+    } else if (itemCount > 9) {
+        xCount = 4;
+        size = KIconLoader::SizeSmallMedium;
+    } else {
+        xCount = 3;
+        size = KIconLoader::SizeMedium;
     }
 
-    default:
-        Q_ASSERT(false);
-        break;
+    if (itemCount < xCount) {
+        xCount = itemCount;
     }
 
-    return QSize();
-}
-
-QHash<QByteArray, QSizeF> KFileItemListView::visibleRolesSizes(const KItemRangeList& itemRanges) const
-{
-    QElapsedTimer timer;
-    timer.start();
-
-    QHash<QByteArray, QSizeF> sizes;
-
-    int calculatedItemCount = 0;
-    bool maxTimeExceeded = false;
-    foreach (const KItemRange& itemRange, itemRanges) {
-        const int startIndex = itemRange.index;
-        const int endIndex = startIndex + itemRange.count - 1;
-
-        for (int i = startIndex; i <= endIndex; ++i) {
-            foreach (const QByteArray& visibleRole, visibleRoles()) {
-                QSizeF maxSize = sizes.value(visibleRole, QSizeF(0, 0));
-                const QSizeF itemSize = visibleRoleSizeHint(i, visibleRole);
-                maxSize = maxSize.expandedTo(itemSize);
-                sizes.insert(visibleRole, maxSize);
-            }
-
-            if (calculatedItemCount > 100 && timer.elapsed() > 200) {
-                // When having several thousands of items calculating the sizes can get
-                // very expensive. We accept a possibly too small role-size in favour
-                // of having no blocking user interface.
-                #ifdef KFILEITEMLISTVIEW_DEBUG
-                    kDebug() << "Timer exceeded, stopped after" << calculatedItemCount << "items";
-                #endif
-                maxTimeExceeded = true;
-                break;
-            }
-        }
-        if (maxTimeExceeded) {
-            break;
-        }
-        ++calculatedItemCount;
+    int yCount = itemCount / xCount;
+    if (itemCount % xCount != 0) {
+        ++yCount;
+    }
+    if (yCount > xCount) {
+        yCount = xCount;
     }
 
-    // Stretch the width of the first role so that the full visible view-width
-    // is used to show all roles.
-    const qreal availableWidth = size().width();
+    // Draw the selected items into the grid cells.
+    QPixmap dragPixmap(xCount * size + xCount, yCount * size + yCount);
+    dragPixmap.fill(Qt::transparent);
 
-    qreal usedWidth = 0;
-    QHashIterator<QByteArray, QSizeF> it(sizes);
+    QPainter painter(&dragPixmap);
+    int x = 0;
+    int y = 0;
+    QSetIterator<int> it(indexes);
     while (it.hasNext()) {
-        it.next();
-        usedWidth += it.value().width();
-    }
+        const int index = it.next();
+
+        QPixmap pixmap = model()->data(index).value("iconPixmap").value<QPixmap>();
+        if (pixmap.isNull()) {
+            KIcon icon(model()->data(index).value("iconName").toString());
+            pixmap = icon.pixmap(size, size);
+        } else {
+            KPixmapModifier::scale(pixmap, QSize(size, size));
+        }
 
-    if (usedWidth < availableWidth) {
-        const QByteArray role = visibleRoles().first();
-        QSizeF firstRoleSize = sizes.value(role);
-        firstRoleSize.rwidth() += availableWidth - usedWidth;
-        sizes.insert(role, firstRoleSize);
-    }
+        painter.drawPixmap(x, y, pixmap);
 
-#ifdef KFILEITEMLISTVIEW_DEBUG
-    int rangesItemCount = 0;
-    foreach (const KItemRange& itemRange, itemRanges) {
-        rangesItemCount += itemRange.count;
-    }
-    kDebug() << "[TIME] Calculated dynamic item size for " << rangesItemCount << "items:" << timer.elapsed();
-#endif
-    return sizes;
-}
+        x += size + 1;
+        if (x >= dragPixmap.width()) {
+            x = 0;
+            y += size + 1;
+        }
 
-QPixmap KFileItemListView::createDragPixmap(const QSet<int>& indexes) const
-{
-    QPixmap pixmap;
-
-    if (model()) {
-        QSetIterator<int> it(indexes);
-        while (it.hasNext()) {
-            const int index = it.next();
-            // TODO: Only one item is considered currently
-            pixmap = model()->data(index).value("iconPixmap").value<QPixmap>();
-            if (pixmap.isNull()) {
-                KIcon icon(model()->data(index).value("iconName").toString());
-                pixmap = icon.pixmap(itemSize().toSize());
-            }
+        if (y >= dragPixmap.height()) {
+            break;
         }
     }
 
-    return pixmap;
+    return dragPixmap;
 }
 
 void KFileItemListView::initializeItemListWidget(KItemListWidget* item)
@@ -263,6 +216,8 @@ void KFileItemListView::initializeItemListWidget(KItemListWidget* item)
     case DetailsLayout: fileItemListWidget->setLayout(KFileItemListWidget::DetailsLayout); break;
     default:            Q_ASSERT(false); break;
     }
+
+    fileItemListWidget->setSupportsItemExpanding(supportsItemExpanding());
 }
 
 bool KFileItemListView::itemSizeHintUpdateRequired(const QSet<QByteArray>& changedRoles) const
@@ -285,13 +240,11 @@ void KFileItemListView::onModelChanged(KItemModelBase* current, KItemModelBase*
     Q_UNUSED(previous);
     Q_ASSERT(qobject_cast<KFileItemModel*>(current));
 
-    if (m_modelRolesUpdater) {
-        delete m_modelRolesUpdater;
-    }
-
+    delete m_modelRolesUpdater;
     m_modelRolesUpdater = new KFileItemModelRolesUpdater(static_cast<KFileItemModel*>(current), this);
-    const int size = styleOption().iconSize;
-    m_modelRolesUpdater->setIconSize(QSize(size, size));
+    m_modelRolesUpdater->setIconSize(availableIconSize());
+
+    applyRolesToModel();
 }
 
 void KFileItemListView::onScrollOrientationChanged(Qt::Orientation current, Qt::Orientation previous)
@@ -317,27 +270,9 @@ void KFileItemListView::onScrollOffsetChanged(qreal current, qreal previous)
 
 void KFileItemListView::onVisibleRolesChanged(const QList<QByteArray>& current, const QList<QByteArray>& previous)
 {
+    Q_UNUSED(current);
     Q_UNUSED(previous);
-
-    Q_ASSERT(qobject_cast<KFileItemModel*>(model()));
-    KFileItemModel* fileItemModel = static_cast<KFileItemModel*>(model());
-
-    // KFileItemModel does not distinct between "visible" and "invisible" roles.
-    // Add all roles that are mandatory for having a working KFileItemListView:
-    QSet<QByteArray> keys = current.toSet();
-    QSet<QByteArray> roles = keys;
-    roles.insert("iconPixmap");
-    roles.insert("iconName");
-    roles.insert("name"); // TODO: just don't allow to disable it
-    roles.insert("isDir");
-    if (m_itemLayout == DetailsLayout) {
-        roles.insert("isExpanded");
-        roles.insert("expansionLevel");
-    }
-
-    fileItemModel->setRoles(roles);
-
-    m_modelRolesUpdater->setRoles(keys);
+    applyRolesToModel();
 }
 
 void KFileItemListView::onStyleOptionChanged(const KItemListStyleOption& current, const KItemListStyleOption& previous)
@@ -347,6 +282,13 @@ void KFileItemListView::onStyleOptionChanged(const KItemListStyleOption& current
     triggerIconSizeUpdate();
 }
 
+void KFileItemListView::onSupportsItemExpandingChanged(bool supportsExpanding)
+{
+    Q_UNUSED(supportsExpanding);
+    applyRolesToModel();
+    updateLayoutOfVisibleItems();
+}
+
 void KFileItemListView::onTransactionBegin()
 {
     m_modelRolesUpdater->setPaused(true);
@@ -376,8 +318,21 @@ void KFileItemListView::slotItemsRemoved(const KItemRangeList& itemRanges)
     updateTimersInterval();
 }
 
+void KFileItemListView::slotSortRoleChanged(const QByteArray& current, const QByteArray& previous)
+{
+    const QByteArray sortRole = model()->sortRole();
+    if (!visibleRoles().contains(sortRole)) {
+        applyRolesToModel();
+    }
+
+    KItemListView::slotSortRoleChanged(current, previous);
+}
+
 void KFileItemListView::triggerVisibleIndexRangeUpdate()
 {
+    if (!model()) {
+        return;
+    }
     m_modelRolesUpdater->setPaused(true);
     m_updateVisibleIndexRangeTimer->start();
 }
@@ -397,8 +352,7 @@ void KFileItemListView::updateVisibleIndexRange()
         // of the icon-size before unpausing m_modelRolesUpdater. This prevents
         // an unnecessary expensive recreation of all previews afterwards.
         m_updateIconSizeTimer->stop();
-        const KItemListStyleOption& option = styleOption();
-        m_modelRolesUpdater->setIconSize(QSize(option.iconSize, option.iconSize));
+        m_modelRolesUpdater->setIconSize(availableIconSize());
     }
 
     m_modelRolesUpdater->setPaused(isTransactionActive());
@@ -407,6 +361,9 @@ void KFileItemListView::updateVisibleIndexRange()
 
 void KFileItemListView::triggerIconSizeUpdate()
 {
+    if (!model()) {
+        return;
+    }
     m_modelRolesUpdater->setPaused(true);
     m_updateIconSizeTimer->start();
 }
@@ -417,8 +374,7 @@ void KFileItemListView::updateIconSize()
         return;
     }
 
-    const KItemListStyleOption& option = styleOption();
-    m_modelRolesUpdater->setIconSize(QSize(option.iconSize, option.iconSize));
+    m_modelRolesUpdater->setIconSize(availableIconSize());
 
     if (m_updateVisibleIndexRangeTimer->isActive()) {
         // If the visibility-index-range update is pending do an immediate update
@@ -434,34 +390,12 @@ void KFileItemListView::updateIconSize()
     updateTimersInterval();
 }
 
-QSizeF KFileItemListView::visibleRoleSizeHint(int index, const QByteArray& role) const
+void KFileItemListView::updateLayoutOfVisibleItems()
 {
-    const KItemListStyleOption& option = styleOption();
-
-    qreal width = m_minimumRolesWidths.value(role, 0);
-    const qreal height = option.margin * 2 + option.fontMetrics.height();
-
-    const QHash<QByteArray, QVariant> values = model()->data(index);
-    const QString text = KFileItemListWidget::roleText(role, values);
-    if (!text.isEmpty()) {
-        const qreal columnMargin = option.margin * 3;
-        width = qMax(width, qreal(2 * columnMargin + option.fontMetrics.width(text)));
-    }
-
-    if (role == "name") {
-        // Increase the width by the expansion-toggle and the current expansion level
-        const int expansionLevel = values.value("expansionLevel", 0).toInt();
-        width += option.margin + expansionLevel * itemSize().height() + KIconLoader::SizeSmall;
-
-        // Increase the width by the required space for the icon
-        width += option.margin * 2 + option.iconSize;
+    if (!model()) {
+        return;
     }
 
-    return QSizeF(width, height);
-}
-
-void KFileItemListView::updateLayoutOfVisibleItems()
-{
     foreach (KItemListWidget* widget, visibleItemListWidgets()) {
         initializeItemListWidget(widget);
     }
@@ -485,13 +419,45 @@ void KFileItemListView::updateTimersInterval()
     m_updateIconSizeTimer->setInterval(interval);
 }
 
-void KFileItemListView::updateMinimumRolesWidths()
+void KFileItemListView::applyRolesToModel()
 {
-    m_minimumRolesWidths.clear();
+    if (!model()) {
+        return;
+    }
 
+    Q_ASSERT(qobject_cast<KFileItemModel*>(model()));
+    KFileItemModel* fileItemModel = static_cast<KFileItemModel*>(model());
+
+    // KFileItemModel does not distinct between "visible" and "invisible" roles.
+    // Add all roles that are mandatory for having a working KFileItemListView:
+    QSet<QByteArray> roles = visibleRoles().toSet();
+    roles.insert("iconPixmap");
+    roles.insert("iconName");
+    roles.insert("name");
+    roles.insert("isDir");
+    if (supportsItemExpanding()) {
+        roles.insert("isExpanded");
+        roles.insert("isExpandable");
+        roles.insert("expandedParentsCount");
+    }
+
+    // Assure that the role that is used for sorting will be determined
+    roles.insert(fileItemModel->sortRole());
+
+    fileItemModel->setRoles(roles);
+    m_modelRolesUpdater->setRoles(roles);
+}
+
+QSize KFileItemListView::availableIconSize() const
+{
     const KItemListStyleOption& option = styleOption();
-    const QString sizeText = QLatin1String("888888") + i18nc("@item:intable", "items");
-    m_minimumRolesWidths.insert("size", option.fontMetrics.width(sizeText));
+    const int iconSize = option.iconSize;
+    if (m_itemLayout == IconsLayout) {
+        const int maxIconWidth = itemSize().width() - 2 * option.padding;
+        return QSize(maxIconWidth, iconSize);
+    }
+
+    return QSize(iconSize, iconSize);
 }
 
 #include "kfileitemlistview.moc"