QmitkApplicationCursor.cpp

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/*============================================================================

The Medical Imaging Interaction Toolkit (MITK)

Copyright (c) German Cancer Research Center (DKFZ)
All rights reserved.

Use of this source code is governed by a 3-clause BSD license that can be
found in the LICENSE file.

============================================================================*/

#include "QmitkApplicationCursor.h"

#include <qapplication.h>
#include <qcursor.h>
#include <qpixmap.h>

#include <iostream>

QmitkApplicationCursor::QmitkApplicationCursor()
{
  mitk::ApplicationCursor::RegisterImplementation(this);
}

void QmitkApplicationCursor::PushCursor(std::istream &cursorStream, int hotspotX, int hotspotY)
{
  if (cursorStream)
  {
    cursorStream.seekg(0, std::ios::end);
    std::ios::pos_type length = cursorStream.tellg();
    cursorStream.seekg(0, std::ios::beg);

    auto data = new char[length];
    cursorStream.read(data, length);
    QPixmap pixmap;
    pixmap.loadFromData(QByteArray::fromRawData(data, length));
    QCursor cursor(pixmap, hotspotX, hotspotY); // no test for validity in QPixmap(xpm)!
    QApplication::setOverrideCursor(cursor);
    delete[] data;
  }
}

void QmitkApplicationCursor::PushCursor(const char *XPM[], int hotspotX, int hotspotY)
{
  QPixmap pixmap(XPM);
  QCursor cursor(pixmap, hotspotX, hotspotY); // no test for validity in QPixmap(xpm)!
  QApplication::setOverrideCursor(cursor);
}

void QmitkApplicationCursor::PopCursor()
{
  QApplication::restoreOverrideCursor();
}

const mitk::Point2I QmitkApplicationCursor::GetCursorPosition()
{
  mitk::Point2I mp;
  QPoint qp = QCursor::pos();
  mp[0] = qp.x();
  mp[1] = qp.y();
  return mp;
}

void QmitkApplicationCursor::SetCursorPosition(const mitk::Point2I &p)
{
  static bool selfCall = false;
  if (selfCall)
    return; // this is to avoid recursive calls
  selfCall = true;
  QCursor::setPos(p[0], p[1]);
  selfCall = false;
}