1 files changed, 159 insertions, 0 deletions
diff --git a/src/gui/widgets/ScrollBox.cpp b/src/gui/widgets/ScrollBox.cpp
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+++ b/src/gui/widgets/ScrollBox.cpp
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+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Rosegarden
+    A MIDI and audio sequencer and musical notation editor.
+ 
+    This program is Copyright 2000-2008
+        Guillaume Laurent   <glaurent@telegraph-road.org>,
+        Chris Cannam        <cannam@all-day-breakfast.com>,
+        Richard Bown        <richard.bown@ferventsoftware.com>
+ 
+    The moral rights of Guillaume Laurent, Chris Cannam, and Richard
+    Bown to claim authorship of this work have been asserted.
+ 
+    This file is based on code from KGhostView, Copyright 1997-2002
+        Markkhu Hihnala     <mah@ee.oulu.fi>
+        and the KGhostView authors.
+
+    Other copyrights also apply to some parts of this work.  Please
+    see the AUTHORS file and individual file headers for details.
+ 
+    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.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+
+#include "ScrollBox.h"
+
+#include <qapplication.h>
+#include <qframe.h>
+#include <qimage.h>
+#include <qpainter.h>
+#include <qpixmap.h>
+#include <qpoint.h>
+#include <qrect.h>
+#include <qsize.h>
+#include <qwidget.h>
+
+
+namespace Rosegarden
+{
+
+ScrollBox::ScrollBox(QWidget* parent, SizeMode sizeMode, const char* name) :
+        QFrame(parent, name),
+        m_sizeMode(sizeMode)
+{
+    setFrameStyle(Panel | Sunken);
+}
+
+void ScrollBox::mousePressEvent(QMouseEvent* e)
+{
+    m_mouse = e->pos();
+    if (e->button() == RightButton)
+        emit button3Pressed();
+    if (e->button() == MidButton)
+        emit button2Pressed();
+}
+
+void ScrollBox::mouseMoveEvent(QMouseEvent* e)
+{
+    if (e->state() != LeftButton)
+        return ;
+
+    int dx = (e->pos().x() - m_mouse.x()) * m_pagesize.width() / width();
+    int dy = (e->pos().y() - m_mouse.y()) * m_pagesize.height() / height();
+
+    emit valueChanged(QPoint(m_viewpos.x() + dx, m_viewpos.y() + dy));
+    emit valueChangedRelative(dx, dy);
+
+    m_mouse = e->pos();
+}
+
+void ScrollBox::drawContents(QPainter* paint)
+{
+    if (m_pagesize.isEmpty())
+        return ;
+
+    QRect c(contentsRect());
+
+    paint->setPen(Qt::red);
+
+    int len = m_pagesize.width();
+    int x = c.x() + c.width() * m_viewpos.x() / len;
+    int w = c.width() * m_viewsize.width() / len ;
+    if (w > c.width())
+        w = c.width();
+
+    len = m_pagesize.height();
+    int y = c.y() + c.height() * m_viewpos.y() / len;
+    int h = c.height() * m_viewsize.height() / len;
+    if (h > c.height())
+        h = c.height();
+
+    paint->drawRect(x, y, w, h);
+}
+
+void ScrollBox::setPageSize(const QSize& s)
+{
+    m_pagesize = s;
+
+    setFixedWidth(100);
+    setFixedHeight(100);
+
+    int maxWidth = int(QApplication::desktop()->width() * 0.75);
+    int maxHeight = int(QApplication::desktop()->height() * 0.75);
+
+    if (m_sizeMode == FixWidth) {
+        int height = s.height() * width() / s.width();
+        if (height > maxHeight) {
+            setFixedWidth(width() * maxHeight / height);
+            height = maxHeight;
+        }
+        setFixedHeight(height);
+    } else {
+        int width = s.width() * height() / s.height();
+        if (width > maxWidth) {
+            setFixedHeight(height() * maxWidth / width);
+            width = maxWidth;
+        }
+        setFixedWidth(width);
+    }
+
+    repaint();
+}
+
+void ScrollBox::setViewSize(const QSize& s)
+{
+    m_viewsize = s;
+    repaint();
+}
+
+void ScrollBox::setViewPos(const QPoint& pos)
+{
+    m_viewpos = pos;
+    repaint();
+}
+
+void ScrollBox::setViewX(int x)
+{
+    m_viewpos = QPoint(x, m_viewpos.y());
+    repaint();
+}
+
+void ScrollBox::setViewY(int y)
+{
+    m_viewpos = QPoint(m_viewpos.x(), y);
+    repaint();
+}
+
+void ScrollBox::setThumbnail(QPixmap img)
+{
+    setPaletteBackgroundPixmap(img.convertToImage().smoothScale(size()));
+}
+
+}
+#include "ScrollBox.moc"