Apply icon effect for cut items

Fix issue that no icon effect got applied to icons that have
been cut.

6 files changed, 210 insertions, 13 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index af82e74fe..c5c02e1c5 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -18,6 +18,7 @@ add_subdirectory(tests)
 ########### next target ###############
 
 set(dolphinprivate_LIB_SRCS
+    kitemviews/kfileitemclipboard.cpp
     kitemviews/kfileitemlistgroupheader.cpp
     kitemviews/kfileitemlistview.cpp
     kitemviews/kfileitemlistwidget.cpp
diff --git a/src/kitemviews/kfileitemclipboard.cpp b/src/kitemviews/kfileitemclipboard.cpp
new file mode 100644
index 000000000..fb63f9530
--- /dev/null
+++ b/src/kitemviews/kfileitemclipboard.cpp
@@ -0,0 +1,76 @@
+/***************************************************************************
+ *   Copyright (C) 2011 by Peter Penz <[email protected]>             *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
+ ***************************************************************************/
+
+#include "kfileitemclipboard_p.h"
+
+#include <KGlobal>
+#include <QApplication>
+#include <QClipboard>
+#include <QMimeData>
+
+class KFileItemClipboardSingleton
+{
+public:
+    KFileItemClipboard instance;
+};
+K_GLOBAL_STATIC(KFileItemClipboardSingleton, s_KFileItemClipboard)
+
+
+
+KFileItemClipboard* KFileItemClipboard::instance()
+{
+    return &s_KFileItemClipboard->instance;
+}
+
+bool KFileItemClipboard::isCut(const KUrl& url) const
+{
+    return m_cutItems.contains(url);
+}
+
+QList<KUrl> KFileItemClipboard::cutItems() const
+{
+    return m_cutItems.toList();
+}
+
+KFileItemClipboard::~KFileItemClipboard()
+{
+}
+
+void KFileItemClipboard::updateCutItems()
+{
+    const QMimeData* mimeData = QApplication::clipboard()->mimeData();
+    const QByteArray data = mimeData->data("application/x-kde-cutselection");
+    const bool isCutSelection = (!data.isEmpty() && data.at(0) == QLatin1Char('1'));
+    if (isCutSelection) {
+        m_cutItems = KUrl::List::fromMimeData(mimeData).toSet();
+        emit cutItemsChanged();
+    }
+}
+
+KFileItemClipboard::KFileItemClipboard() :
+    QObject(0),
+    m_cutItems()
+{
+    updateCutItems();
+
+    connect(QApplication::clipboard(), SIGNAL(dataChanged()),
+            this, SLOT(updateCutItems()));
+}
+
+#include "kfileitemclipboard_p.moc"
diff --git a/src/kitemviews/kfileitemclipboard_p.h b/src/kitemviews/kfileitemclipboard_p.h
new file mode 100644
index 000000000..86eb8e9fc
--- /dev/null
+++ b/src/kitemviews/kfileitemclipboard_p.h
@@ -0,0 +1,62 @@
+/***************************************************************************
+ *   Copyright (C) 2011 by Peter Penz <[email protected]>             *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
+ ***************************************************************************/
+
+#ifndef KFILEITEMCLIPBOARD_H
+#define KFILEITEMCLIPBOARD_H
+
+#include <KUrl>
+#include <QList>
+#include <QSet>
+#include <QObject>
+
+#include "libdolphin_export.h"
+
+/**
+ * @brief Wrapper for QClipboard to provide fast access for checking
+ *        whether a KFileItem has been clipped.
+ */
+class LIBDOLPHINPRIVATE_EXPORT KFileItemClipboard : public QObject
+{
+    Q_OBJECT
+
+public:
+    static KFileItemClipboard* instance();
+
+    bool isCut(const KUrl& url) const;
+
+    QList<KUrl> cutItems() const;
+
+signals:
+    void cutItemsChanged();
+
+protected:
+    virtual ~KFileItemClipboard();
+
+private slots:
+    void updateCutItems();
+
+private:
+    KFileItemClipboard();
+
+    QSet<KUrl> m_cutItems;
+
+    friend class KFileItemClipboardSingleton;
+};
+
+#endif
diff --git a/src/kitemviews/kfileitemlistwidget.cpp b/src/kitemviews/kfileitemlistwidget.cpp
index 897600e60..4eccf6862 100644
--- a/src/kitemviews/kfileitemlistwidget.cpp
+++ b/src/kitemviews/kfileitemlistwidget.cpp
@@ -19,6 +19,7 @@
 
 #include "kfileitemlistwidget.h"
 
+#include "kfileitemclipboard_p.h"
 #include "kfileitemmodel.h"
 #include "kitemlistview.h"
 #include "kpixmapmodifier_p.h"
@@ -41,6 +42,8 @@
 
 KFileItemListWidget::KFileItemListWidget(QGraphicsItem* parent) :
     KItemListWidget(parent),
+    m_isCut(false),
+    m_isHidden(false),
     m_isDir(false),
     m_dirtyLayout(true),
     m_dirtyContent(true),
@@ -362,6 +365,40 @@ void KFileItemListWidget::resizeEvent(QGraphicsSceneResizeEvent* event)
     m_dirtyLayout = true;
 }
 
+void KFileItemListWidget::showEvent(QShowEvent* event)
+{
+    KItemListWidget::showEvent(event);
+
+    // Listen to changes of the clipboard to mark the item as cut/uncut
+    KFileItemClipboard* clipboard = KFileItemClipboard::instance();
+
+    const KUrl itemUrl = data().value("url").value<KUrl>();
+    m_isCut = clipboard->isCut(itemUrl);
+
+    connect(clipboard, SIGNAL(cutItemsChanged()),
+            this, SLOT(slotCutItemsChanged()));
+}
+
+void KFileItemListWidget::hideEvent(QHideEvent* event)
+{
+    disconnect(KFileItemClipboard::instance(), SIGNAL(cutItemsChanged()),
+               this, SLOT(slotCutItemsChanged()));
+
+    KItemListWidget::hideEvent(event);
+}
+
+void KFileItemListWidget::slotCutItemsChanged()
+{
+    const KUrl itemUrl = data().value("url").value<KUrl>();
+    const bool isCut = KFileItemClipboard::instance()->isCut(itemUrl);
+    if (m_isCut != isCut) {
+        m_isCut = isCut;
+        m_pixmap = QPixmap();
+        m_dirtyContent = true;
+        update();
+    }
+}
+
 void KFileItemListWidget::triggerCacheRefreshing()
 {
     if ((!m_dirtyContent && !m_dirtyLayout) || index() < 0) {
@@ -370,7 +407,9 @@ void KFileItemListWidget::triggerCacheRefreshing()
 
     refreshCache();
 
-    m_isDir = data()["isDir"].toBool();
+    const QHash<QByteArray, QVariant> values = data();
+    m_isDir = values["isDir"].toBool();
+    m_isHidden = values["name"].toString().startsWith(QLatin1Char('.'));
 
     updateExpansionArea();
     updateTextsCache();
@@ -471,6 +510,14 @@ void KFileItemListWidget::updatePixmapCache()
             m_hoverPixmapRect.setSize(m_pixmap.size());
         }
 
+        if (m_isCut) {
+            applyCutEffect(m_pixmap);
+        }
+
+        if (m_isHidden) {
+            applyHiddenEffect(m_pixmap);
+        }
+
         Q_ASSERT(m_pixmap.height() == iconHeight);
     }
     if (!m_overlay.isNull()) {
@@ -498,7 +545,7 @@ void KFileItemListWidget::updatePixmapCache()
         KIconEffect* effect = KIconLoader::global()->iconEffect();
         // In the KIconLoader terminology, active = hover.
         if (effect->hasEffect(KIconLoader::Desktop, KIconLoader::ActiveState)) {
-            m_hoverPixmap =  effect->apply(m_pixmap, KIconLoader::Desktop, KIconLoader::ActiveState);
+            m_hoverPixmap = effect->apply(m_pixmap, KIconLoader::Desktop, KIconLoader::ActiveState);
         } else {
             m_hoverPixmap = m_pixmap;
         }
@@ -765,13 +812,6 @@ void KFileItemListWidget::updateAdditionalInfoTextColor()
 
 void KFileItemListWidget::drawPixmap(QPainter* painter, const QPixmap& pixmap)
 {
-    const bool isHiddenItem = m_text[Name].text().startsWith(QLatin1Char('.'));
-    qreal opacity;
-    if (isHiddenItem) {
-        opacity = painter->opacity();
-        painter->setOpacity(opacity * 0.3);
-    }
-
     if (m_scaledPixmapSize != pixmap.size()) {
         QPixmap scaledPixmap = pixmap;
         KPixmapModifier::scale(scaledPixmap, m_scaledPixmapSize);
@@ -784,10 +824,6 @@ void KFileItemListWidget::drawPixmap(QPainter* painter, const QPixmap& pixmap)
     } else {
         painter->drawPixmap(m_pixmapPos, pixmap);
     }
-
-    if (isHiddenItem) {
-        painter->setOpacity(opacity);
-    }
 }
 
 QPixmap KFileItemListWidget::pixmapForIcon(const QString& name, int size)
@@ -839,4 +875,15 @@ KFileItemListWidget::TextId KFileItemListWidget::roleTextId(const QByteArray& ro
     return rolesHash.value(role);
 }
 
+void KFileItemListWidget::applyCutEffect(QPixmap& pixmap)
+{
+    KIconEffect* effect = KIconLoader::global()->iconEffect();
+    pixmap = effect->apply(pixmap, KIconLoader::Desktop, KIconLoader::DisabledState);
+}
+
+void KFileItemListWidget::applyHiddenEffect(QPixmap& pixmap)
+{
+    KIconEffect::semiTransparent(pixmap);
+}
+
 #include "kfileitemlistwidget.moc"
diff --git a/src/kitemviews/kfileitemlistwidget.h b/src/kitemviews/kfileitemlistwidget.h
index 3e47b567b..5baaa1b28 100644
--- a/src/kitemviews/kfileitemlistwidget.h
+++ b/src/kitemviews/kfileitemlistwidget.h
@@ -87,6 +87,11 @@ protected:
     virtual void hoveredChanged(bool hovered);
     virtual void selectedChanged(bool selected);
     virtual void resizeEvent(QGraphicsSceneResizeEvent* event);
+    virtual void showEvent(QShowEvent* event);
+    virtual void hideEvent(QHideEvent* event);
+
+private slots:
+    void slotCutItemsChanged();
 
 private:
     enum TextId {
@@ -117,9 +122,14 @@ private:
 
     static QPixmap pixmapForIcon(const QString& name, int size);
     static TextId roleTextId(const QByteArray& role);
+    static void applyCutEffect(QPixmap& pixmap);
+    static void applyHiddenEffect(QPixmap& pixmap);
 
 private:
+    bool m_isCut;
+    bool m_isHidden;
     bool m_isDir;
+
     bool m_dirtyLayout;
     bool m_dirtyContent;
     QSet<QByteArray> m_dirtyContentRoles;
diff --git a/src/kitemviews/kfileitemmodel.cpp b/src/kitemviews/kfileitemmodel.cpp
index 945aa82c8..d1e0fc6f1 100644
--- a/src/kitemviews/kfileitemmodel.cpp
+++ b/src/kitemviews/kfileitemmodel.cpp
@@ -946,6 +946,7 @@ QHash<QByteArray, QVariant> KFileItemModel::retrieveData(const KFileItem& item)
     // and hence will be retrieved asynchronously by KFileItemModelRolesUpdater.
     QHash<QByteArray, QVariant> data;
     data.insert("iconPixmap", QPixmap());
+    data.insert("url", item.url());
 
     const bool isDir = item.isDir();
     if (m_requestRole[IsDirRole]) {