File indexing completed on 2024-06-23 04:26:12

 /*
  *  SPDX-FileCopyrightText: 2015 Dmitry Kazakov <dimula73@gmail.com>
  *
  *  SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 #include "kis_draggable_tool_button.h"
 
 #include <QMouseEvent>
 
 #include "kis_debug.h"
 
 
 KisDraggableToolButton::KisDraggableToolButton(QWidget *parent)
     : QToolButton(parent),
       m_orientation(Qt::Horizontal)
 {
 }
 
 KisDraggableToolButton::~KisDraggableToolButton()
 {
 }
 
 void KisDraggableToolButton::beginDrag(const QPoint &pos)
 {
     m_startPoint = pos;
     m_lastPosition = m_startPoint;
 }
 
 int KisDraggableToolButton::continueDrag(const QPoint &pos)
 {
     QPoint diff = pos - m_startPoint;
 
     int value = 0;
 
     qreal tanx = diff.x() != 0 ? qAbs(qreal(diff.y()) / diff.x()) : 100.0;
 
     if (tanx > 10 && m_orientation == Qt::Horizontal) {
         m_orientation = Qt::Vertical;
     } else if (tanx < 0.1 && m_orientation == Qt::Vertical) {
         m_orientation = Qt::Horizontal;
     }
 
     // people like it more when the they can zoom by dragging in both directions
     Q_UNUSED(m_orientation);
 
     value = diff.x() - diff.y();
 
     return value;
 }
 
 int KisDraggableToolButton::movementDelta(const QPoint &pos)
 {
     QPoint diff = pos - m_lastPosition;
     m_lastPosition = pos;
     return diff.x() - diff.y();
 
 }
 
 void KisDraggableToolButton::mousePressEvent(QMouseEvent *e)
 {
     beginDrag(e->pos());
     QToolButton::mousePressEvent(e);
 }
 
 void KisDraggableToolButton::mouseMoveEvent(QMouseEvent *e)
 {
     int distance = continueDrag(e->pos());
     emit offsetChanged(distance);
     int delta = movementDelta(e->pos());
     emit valueChanged(delta);
 
     QToolButton::mouseMoveEvent(e);
 }