1 files changed, 148 insertions, 0 deletions
diff --git a/src/tagcloud/taggingpopup.cpp b/src/tagcloud/taggingpopup.cpp
new file mode 100644
index 000000000..a1024254d
--- /dev/null
+++ b/src/tagcloud/taggingpopup.cpp
@@ -0,0 +1,148 @@
+/*
+   This file is part of the Nepomuk KDE project.
+   Copyright (C) 2007 Sebastian Trueg <[email protected]>
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License version 2 as published by the Free Software Foundation.
+
+   This library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public License
+   along with this library; see the file COPYING.LIB.  If not, write to
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.
+ */
+
+#include "taggingpopup.h"
+
+#include <QtCore/QEventLoop>
+#include <QtCore/QPointer>
+#include <QtGui/QApplication>
+#include <QtGui/QDesktopWidget>
+#include <QtGui/QMouseEvent>
+
+#include <KDebug>
+#include <KDialog>
+
+
+class Nepomuk::TaggingPopup::Private
+{
+public:
+    Private( TaggingPopup* parent )
+        : eventLoop( 0 ),
+          m_parent( parent ) {
+    }
+
+    QEventLoop* eventLoop;
+    QPoint popupPos;
+
+    QRect geometryForPopupPos( const QPoint& p ) {
+        QSize size = m_parent->sizeHint();
+
+        // we want a little margin
+        const int margin = KDialog::marginHint();
+        size.setHeight( size.height() + margin*2 );
+        size.setWidth( size.width() + margin*2 );
+
+        QRect screen = QApplication::desktop()->screenGeometry( QApplication::desktop()->screenNumber( p ) );
+
+        // calculate popup position
+        QPoint pos( p.x() - size.width()/2, p.y() - size.height()/2 );
+
+        // ensure we do not leave the desktop
+        if ( pos.x() + size.width() > screen.right() ) {
+            pos.setX( screen.right() - size.width() );
+        }
+        else if ( pos.x() < screen.left() ) {
+            pos.setX( screen.left() );
+        }
+
+        if ( pos.y() + size.height() > screen.bottom() ) {
+            pos.setY( screen.bottom() - size.height() );
+        }
+        else if ( pos.y() < screen.top() ) {
+            pos.setY( screen.top() );
+        }
+
+        return QRect( pos, size );
+    }
+
+private:
+    TaggingPopup* m_parent;
+};
+
+
+Nepomuk::TaggingPopup::TaggingPopup( QWidget* parent )
+    : TagCloud( parent ),
+      d( new Private( this ) )
+{
+    setFrameStyle( QFrame::Box|QFrame::Plain );
+    setWindowFlags( Qt::Popup );
+}
+
+
+Nepomuk::TaggingPopup::~TaggingPopup()
+{
+    delete d;
+}
+
+
+void Nepomuk::TaggingPopup::popup( const QPoint& p )
+{
+    setGeometry( d->geometryForPopupPos( p ) );
+    d->popupPos = p;
+
+    show();
+}
+
+
+void Nepomuk::TaggingPopup::exec( const QPoint& pos )
+{
+    QEventLoop eventLoop;
+    d->eventLoop = &eventLoop;
+    popup( pos );
+
+    QPointer<QObject> guard = this;
+    (void) eventLoop.exec();
+    if ( !guard.isNull() )
+        d->eventLoop = 0;
+}
+
+
+void Nepomuk::TaggingPopup::mousePressEvent( QMouseEvent* e )
+{
+    if ( !rect().contains( e->pos() ) ) {
+        hide();
+    }
+    else {
+        TagCloud::mousePressEvent( e );
+    }
+}
+
+
+void Nepomuk::TaggingPopup::hideEvent( QHideEvent* e )
+{
+    Q_UNUSED( e );
+    if ( d->eventLoop ) {
+        d->eventLoop->exit();
+    }
+}
+
+
+bool Nepomuk::TaggingPopup::event( QEvent* e )
+{
+    if ( e->type() == QEvent::LayoutRequest ) {
+        if ( isVisible() ) {
+            setGeometry( d->geometryForPopupPos( d->popupPos ) );
+            return true;
+        }
+    }
+
+    return TagCloud::event( e );
+}
+
+#include "taggingpopup.moc"