1 files changed, 85 insertions, 0 deletions
diff --git a/src/frontend/keychooser/cscrollbutton.cpp b/src/frontend/keychooser/cscrollbutton.cpp
new file mode 100644
index 0000000..742bc53
--- /dev/null
+++ b/src/frontend/keychooser/cscrollbutton.cpp
@@ -0,0 +1,85 @@
+/*********
+*
+* This file is part of BibleTime's source code, http://www.bibletime.info/.
+*
+* Copyright 1999-2008 by the BibleTime developers.
+* The BibleTime source code is licensed under the GNU General Public License version 2.0.
+*
+**********/
+
+
+
+#include "cscrollbutton.h"
+
+
+#include <stdlib.h>
+#include <math.h>
+
+//Qt includes
+#include <QEvent>
+#include <QApplication>
+#include <QCursor>
+#include <QPoint>
+#include <QMouseEvent>
+#include <QWheelEvent>
+
+CScrollButton::CScrollButton(QWidget *parent) : QToolButton(parent) {
+	setFocusPolicy(Qt::WheelFocus);
+	setCursor(Qt::SplitVCursor );
+
+	m_isLocked = false;
+	connect(this, SIGNAL(pressed() ), SLOT(was_pressed() ));
+	connect(this, SIGNAL(released()), SLOT(was_released()));
+}
+
+bool CScrollButton::isLocked( ) const {
+	return m_isLocked;
+}
+
+void CScrollButton::was_pressed( ) {
+	QApplication::setOverrideCursor(Qt::BlankCursor);
+	m_isLocked = true;
+	lock_Point = get_lock_Point();
+
+	emit lock()
+		;
+}
+
+void CScrollButton::was_released( ) {
+	QApplication::restoreOverrideCursor();
+	m_isLocked = false;
+
+	emit unlock();
+}
+
+const QPoint CScrollButton::get_lock_Point() const {
+	return mapToGlobal( QPoint( width()/2, height()/2 ) );
+}
+
+void CScrollButton::mouseMoveEvent( QMouseEvent* e ) {
+	if (m_isLocked) {
+		int vchange = (QCursor::pos().y() - lock_Point.y());
+
+		if (abs(vchange) < 10) {
+			vchange = (int)((vchange>0 ? 1 : -1) * pow(abs(vchange), 0.3));
+		}
+		else if (abs(vchange) < 30) {
+			vchange = (int)((vchange>0 ? 1 : -1) * pow(abs(vchange), 0.6));
+		}
+		else if (abs(vchange) < 40) {
+			vchange = (int)((vchange>0 ? 1 : -1) * pow(abs(vchange), 1.2));
+		}
+		else {
+			vchange = (int)((vchange>0 ? 1 : -1) * pow(abs(vchange), 2.0));
+		}
+
+		if (vchange) { //not emit 0
+			emit change_requested( vchange );
+		}
+
+		QCursor::setPos( lock_Point );
+	}
+	else {
+		QToolButton::mouseMoveEvent(e);
+	}
+}