QTWindow.cpp

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// ****************************************************************************
// This file is part of the Integrating Vision Toolkit (IVT).
//
// The IVT is maintained by the Karlsruhe Institute of Technology (KIT)
// (www.kit.edu) in cooperation with the company Keyetech (www.keyetech.de).
//
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// All rights reserved.
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//
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
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//    used to endorse or promote products derived from this software
//    without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE KIT AND CONTRIBUTORS “AS IS” AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE KIT OR CONTRIBUTORS BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// ****************************************************************************
// ****************************************************************************
// Filename:  QTWindow.cpp
// Author:    Pedram Azad
// Date:      2005
// ****************************************************************************


// ****************************************************************************
// Necessary includes
// ****************************************************************************

#include "QTWindow.h"
#include "Interfaces/WindowEventInterface.h"
#include "Image/ByteImage.h"

#include <qpainter.h>
#include <qimage.h>
#include <qlcdnumber.h>
#include <qcheckbox.h>

#if QT_VERSION >= 0x040000
#include <QtGui/QMouseEvent>
#endif

#include <memory.h>



// ****************************************************************************
// Constructor / Destructor
// ****************************************************************************

CQTWindow::CQTWindow(int nWidth, int nHeight, CWindowEventInterface *pWindowEventInterface, QWidget *pParent) : QWidget(pParent)
{
        setFixedSize(nWidth, nHeight);

        m_nImageWidth = -1;
        m_nImageHeight = -1;
        
        m_pBuffer = 0;  
        
        m_type = -1;
        m_bMarkRectangle = pWindowEventInterface != 0;
        
        m_bGetRect = false;
        m_nRectX0 = m_nRectY0 = m_nRectX1 = m_nRectY1 = 0;
        
        m_pWindowEventInterface = pWindowEventInterface;
}

CQTWindow::~CQTWindow()
{
        if (m_pBuffer)
                delete [] m_pBuffer;
}


// ****************************************************************************
// Methods
// ****************************************************************************

void CQTWindow::paintEvent(QPaintEvent *e)
{
        if (m_type != -1)
        {
                QPainter painter(this);

                #if QT_VERSION >= 0x040000
                QImage image(m_pBuffer, m_nImageWidth, m_nImageHeight, QImage::Format_RGB32);
                #else
                QImage image(m_pBuffer, m_nImageWidth, m_nImageHeight, 32, 0, 0, QImage::BigEndian);
                #endif

                painter.drawImage(m_nImageX, m_nImageY, image);

                if (m_bMarkRectangle && m_bGetRect)
                {
                        QPen pen(Qt::blue, 1);
                        painter.setPen(pen);
                        painter.drawRect(m_nRectX0, m_nRectY0, m_nRectX1 - m_nRectX0, m_nRectY1 - m_nRectY0);
                }
        }
}

void CQTWindow::Show()
{
        show();
}

void CQTWindow::Hide()
{
        hide();
}

void CQTWindow::DrawImage(const CByteImage *pImage, int x, int y)
{
        if (m_nImageWidth != pImage->width || m_nImageHeight != pImage->height)
        {
                m_nImageWidth = pImage->width;
                m_nImageHeight = pImage->height;

                if (m_pBuffer)
                        delete [] m_pBuffer;

                m_pBuffer = new unsigned char[m_nImageWidth * m_nImageHeight * 4];
        }
        
        m_nImageX = x;
        m_nImageY = y;
        
        if (pImage->type == CByteImage::eGrayScale)
        {
                const int nPixels = m_nImageWidth * m_nImageHeight;
                unsigned char *pixels = pImage->pixels;
                int *output = (int *) m_pBuffer;

                for (int i = 0; i < nPixels; i++)
                        output[i] = 255 << 24 | pixels[i] << 16 | pixels[i] << 8 | pixels[i];
                        
                m_type = CByteImage::eGrayScale;
        }
        else if (pImage->type == CByteImage::eRGB24)
        {
                const int nPixels = m_nImageWidth * m_nImageHeight;
                unsigned char *pixels = pImage->pixels;
                int *output = (int *) m_pBuffer;

                for (int offset = 0, i = 0; i < nPixels; i++)
                {
                        output[i] = 255 << 24 | pixels[offset] << 16 | pixels[offset + 1] << 8 | pixels[offset + 2];
                        offset += 3;
                }
                        
                m_type = CByteImage::eRGB24;
        }
        
        #if QT_VERSION >= 0x040000
        repaint(x, y, m_nImageWidth, m_nImageHeight);
        #else
        repaint(x, y, m_nImageWidth, m_nImageHeight, false);
        #endif
}

void CQTWindow::mousePressEvent(QMouseEvent *e)
{
        if (e->button() != Qt::LeftButton)
                return;
                
        if (m_pWindowEventInterface)
                m_pWindowEventInterface->PointClicked(e->x(), e->y());
                
        if (m_bGetRect)
        {
                // rect is already being captured => abort
                m_bGetRect = false;
                return;
        }
        
        m_bGetRect = true;
        
        m_nRectX0 = m_nRectX1 = e->x();
        m_nRectY0 = m_nRectY1 = e->y();
}

void CQTWindow::mouseMoveEvent(QMouseEvent *e)
{
        if (!m_bGetRect)
                return;

        m_nRectX1 = e->x();
        m_nRectY1 = e->y();
}

void CQTWindow::mouseReleaseEvent(QMouseEvent *e)
{
        if (!m_bGetRect)
                return;
                
        m_bGetRect = false;
                
        if (m_nRectX0 == m_nRectX1 || m_nRectY0 == m_nRectY1)
                return;
                
        if (m_nRectX1 < m_nRectX0)
        {
                int temp = m_nRectX1;
                m_nRectX1 = m_nRectX0;
                m_nRectX0 = temp;
        }
        
        if (m_nRectY1 < m_nRectY0)
        {
                int temp = m_nRectY1;
                m_nRectY1 = m_nRectY0;
                m_nRectY0 = temp;
        }
                
        if (m_pWindowEventInterface)
                m_pWindowEventInterface->RectSelected(m_nRectX0, m_nRectY0, m_nRectX1, m_nRectY1);
}