Re-view and re-add tab highlight feature

5 files changed, 263 insertions, 2 deletions

diff --git a/src/tabwindow/tabbar.cpp b/src/tabwindow/tabbar.cpp
index bcb39b10..0bed6e69 100644
--- a/src/tabwindow/tabbar.cpp
+++ b/src/tabwindow/tabbar.cpp
@@ -22,16 +22,33 @@
 #include "tabbar.moc"
 
 #include "tabwindow.h"
+#include "tabhighlighteffect.h"
 
 #include <KDebug>
 #include <KAcceleratorManager>
 #include <KAction>
+#include <KColorScheme>
 #include <KLocalizedString>
 #include <KMenu>
 
+#include <QPropertyAnimation>
+#include <QSignalMapper>
+#include <QStyleOptionFrameV3>
+
+
+static inline QByteArray highlightPropertyName(int index)
+{
+    return QByteArray("hAnim").append(QByteArray::number(index));
+}
+
+
+// ------------------------------------------------------------------------------------
+
 
 TabBar::TabBar(QWidget *parent)
     : KTabBar(parent)
+    , m_tabHighlightEffect(new TabHighlightEffect(this))
+    , m_animationMapper(new QSignalMapper(this))
 {
     setElideMode(Qt::ElideRight);
 
@@ -47,6 +64,11 @@ TabBar::TabBar(QWidget *parent)
 
     connect(this, SIGNAL(contextMenu(int, QPoint)), this, SLOT(contextMenu(int, QPoint)));
     connect(this, SIGNAL(emptyAreaContextMenu(QPoint)), this, SLOT(emptyAreaContextMenu(QPoint)));
+
+    // Highlight effect
+    connect(m_animationMapper, SIGNAL(mapped(int)), this, SLOT(removeAnimation(int)));
+    setGraphicsEffect(m_tabHighlightEffect);
+    m_tabHighlightEffect->setEnabled(true);
 }
 
 
@@ -240,3 +262,60 @@ void TabBar::emptyAreaContextMenu(const QPoint &pos)
 
     menu.exec(pos);
 }
+
+
+void TabBar::setTabHighlighted(int index, bool b)
+{
+    if (!b)
+    {
+        removeAnimation(index);
+        setTabTextColor(index, KColorScheme(QPalette::Active, KColorScheme::Window).foreground(KColorScheme::NormalText).color());
+
+        return;
+    }
+
+    const QByteArray propertyName = highlightPropertyName(index);
+    const QColor highlightColor = KColorScheme(QPalette::Active, KColorScheme::Window).foreground(KColorScheme::PositiveText).color();
+
+    if (tabTextColor(index) != highlightColor)
+    {
+        m_tabHighlightEffect->setEnabled(true);
+        m_tabHighlightEffect->setProperty(propertyName, qreal(0.9));
+        QPropertyAnimation *anim = new QPropertyAnimation(m_tabHighlightEffect, propertyName);
+        m_highlightAnimation.insert(propertyName, anim);
+
+        //setup the animation
+        anim->setStartValue(0.9);
+        anim->setEndValue(0.0);
+        anim->setDuration(500);
+        anim->setLoopCount(2);
+        anim->start(QAbstractAnimation::DeleteWhenStopped);
+
+        m_animationMapper->setMapping(anim, index);
+        connect(anim, SIGNAL(finished()), m_animationMapper, SLOT(map()));
+
+        setTabTextColor(index, highlightColor);
+    }    
+}
+
+
+QRect TabBar::tabTextRect(int index)
+{
+    QStyleOptionTabV3 option;
+    initStyleOption(&option, index);
+    return style()->subElementRect(QStyle::SE_TabBarTabText, &option, this);
+}
+
+
+void TabBar::removeAnimation(int index)
+{
+    const QByteArray propertyName = highlightPropertyName(index);
+    m_tabHighlightEffect->setProperty(propertyName, QVariant()); //destroy the property
+
+    QPropertyAnimation *anim = m_highlightAnimation.take(propertyName);
+    m_animationMapper->removeMappings(anim);
+    delete anim;
+
+    if (m_highlightAnimation.isEmpty())
+        m_tabHighlightEffect->setEnabled(false);
+}
diff --git a/src/tabwindow/tabbar.h b/src/tabwindow/tabbar.h
index 9de5fe0a..4cc437ac 100644
--- a/src/tabwindow/tabbar.h
+++ b/src/tabwindow/tabbar.h
@@ -25,6 +25,13 @@
 // KDE Includes
 #include <KTabBar>
 
+#include <QPropertyAnimation>
+
+// Forward Declarations
+class TabHighlightEffect;
+
+class QSignalMapper;
+    
 
 class TabBar : public KTabBar
 {
@@ -33,6 +40,9 @@ class TabBar : public KTabBar
 public:
     TabBar(QWidget *parent);
 
+    void setTabHighlighted(int index, bool b);
+    QRect tabTextRect(int index);
+
     static const int genericTabNumber = 6;
 
 protected:
@@ -56,6 +66,14 @@ private Q_SLOTS:
 
     void contextMenu(int, const QPoint &);
     void emptyAreaContextMenu(const QPoint &);
+
+    void removeAnimation(int index);
+
+private:
+    // highlightAnimation
+    TabHighlightEffect *m_tabHighlightEffect;
+    QHash<QByteArray, QPropertyAnimation*> m_highlightAnimation;
+    QSignalMapper *m_animationMapper;
 };
 
 #endif // TAB_BAR
diff --git a/src/tabwindow/tabhighlighteffect.cpp b/src/tabwindow/tabhighlighteffect.cpp
new file mode 100644
index 00000000..121afd15
--- /dev/null
+++ b/src/tabwindow/tabhighlighteffect.cpp
@@ -0,0 +1,100 @@
+/* ============================================================
+*
+* This file is a part of the rekonq project
+*
+* Copyright (C) 2011 Tröscher Johannes <fritz_van_tom@hotmail.com>
+*
+*
+* 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) version 3 or any later version
+* accepted by the membership of KDE e.V. (or its successor approved
+* by the membership of KDE e.V.), which shall act as a proxy
+* defined in Section 14 of version 3 of the license.
+*
+* 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, see <http://www.gnu.org/licenses/>.
+*
+* ============================================================ */
+
+
+// Self Includes
+#include "tabhighlighteffect.h"
+#include "tabhighlighteffect.moc"
+
+// Local Includes
+#include "tabbar.h"
+
+// Qt Includes
+#include <QEvent>
+#include <QPainter>
+#include <QVariant>
+
+
+const QByteArray prep("hAnim");
+
+
+// ---------------------------------------------------------------------------
+
+
+TabHighlightEffect::TabHighlightEffect(TabBar *tabBar)
+    : QGraphicsEffect(tabBar)
+    , m_tabBar(tabBar)
+    , m_highlightColor(tabBar->palette().highlight().color().lighter())
+{
+    Q_ASSERT(m_tabBar);
+}
+
+
+void TabHighlightEffect::draw(QPainter *painter)
+{
+    const QPixmap &pixmap = sourcePixmap();
+
+    if (pixmap.isNull())
+        return;
+
+    painter->drawPixmap(QPoint(0, 0), pixmap);
+
+    Q_FOREACH(const QByteArray & propertyName, dynamicPropertyNames())
+    {
+        if (!propertyName.startsWith(prep))
+            continue;
+
+        int index = propertyName.right(propertyName.size() - prep.size()).toInt();
+        qreal opacity = property(propertyName).toReal();
+        QRect textRect =  m_tabBar->tabTextRect(index);
+
+        if (!boundingRect().contains(textRect))
+            continue;
+
+        QString tabText = m_tabBar->fontMetrics().elidedText(m_tabBar->tabText(index), Qt::ElideRight,
+                          textRect.width(), Qt::TextShowMnemonic);
+
+        painter->setOpacity(opacity);
+        painter->setPen(m_highlightColor);
+        painter->drawText(textRect, Qt::AlignCenter | Qt::TextShowMnemonic, tabText);
+    }
+}
+
+
+bool TabHighlightEffect::event(QEvent* event)
+{
+    if (event->type() == QEvent::DynamicPropertyChange)
+    {
+        QDynamicPropertyChangeEvent *pChangeEv = dynamic_cast<QDynamicPropertyChangeEvent*>(event);
+
+        if (pChangeEv->propertyName().startsWith(prep))
+        {
+            update();
+            return true;
+        }
+    }
+
+    return QGraphicsEffect::event(event);
+}
diff --git a/src/tabwindow/tabhighlighteffect.h b/src/tabwindow/tabhighlighteffect.h
new file mode 100644
index 00000000..88302283
--- /dev/null
+++ b/src/tabwindow/tabhighlighteffect.h
@@ -0,0 +1,58 @@
+/* ============================================================
+*
+* This file is a part of the rekonq project
+*
+* Copyright (C) 2011 Tröscher Johannes <fritz_van_tom@hotmail.com>
+*
+*
+* 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) version 3 or any later version
+* accepted by the membership of KDE e.V. (or its successor approved
+* by the membership of KDE e.V.), which shall act as a proxy
+* defined in Section 14 of version 3 of the license.
+*
+* 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, see <http://www.gnu.org/licenses/>.
+*
+* ============================================================ */
+
+
+#ifndef TABHIGHLIGHTEFFECT_H
+#define TABHIGHLIGHTEFFECT_H
+
+
+// Qt Includes
+#include <QGraphicsEffect>
+#include <QColor>
+
+// Forward Declarations
+class TabBar;
+
+class QEvent;
+class QPainter;
+
+
+class TabHighlightEffect : public QGraphicsEffect
+{
+    Q_OBJECT
+
+public:
+    explicit TabHighlightEffect(TabBar *tabBar = 0);
+
+protected:
+    virtual void draw(QPainter *painter);
+    virtual bool event(QEvent *event);
+
+private:
+    TabBar * const m_tabBar;
+    QColor m_highlightColor;
+};
+
+#endif // TABHIGHLIGHTEFFECT_H
diff --git a/src/tabwindow/tabwindow.cpp b/src/tabwindow/tabwindow.cpp
index 772fe3e2..a211f63e 100644
--- a/src/tabwindow/tabwindow.cpp
+++ b/src/tabwindow/tabwindow.cpp
@@ -189,9 +189,9 @@ void TabWindow::pageCreated(WebPage *page)
 
 void TabWindow::currentChanged(int newIndex)
 {
-    Q_UNUSED(newIndex);
-
     _openedTabsCounter = 0;
+    
+    tabBar()->setTabHighlighted(newIndex, false);
 }
 
 
@@ -246,6 +246,12 @@ void TabWindow::tabTitleChanged(const QString &title)
         setTabText(index, tabTitle);
     }
 
+    if (currentIndex() != index)
+    {
+        if (tabTitle != i18n("(Untitled)"))
+            tabBar()->setTabHighlighted(index, true);
+    }
+
     // TODO: What about window title?
 }