smilelabel.cpp

用qt4 编写的局域网聊天工具

/***************************************************************************
 *   Copyright (C) 2007 by Anistratov Oleg                                 *
 *   [e-mail]                                            *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License version 2        *
 *   as published by the Free Software Foundation;                         *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 ***************************************************************************/

#include "smilelabel.h"

#include <QSize>
#include <QToolTip>
#include <QPixmap>

SmileLabel::SmileLabel(QWidget *parent) :
  QLabel(parent),
  m_inited(false),
  m_selected(false)
{
  m_movie  = new QMovie(this);

  setMovie(m_movie);
  setAlignment(Qt::AlignCenter);
  setMouseTracking(true);
}

SmileLabel::~SmileLabel()
{

}

bool SmileLabel::load( const QString & prefix )
{
  if(!m_filename.isEmpty())
  {
    QPixmap pix(prefix + "/" + m_filename);
    m_movie->setFileName(prefix + "/" + m_filename);
//     m_movie->start();
    m_movie->jumpToNextFrame();

    m_inited = (m_movie->isValid() && !m_smileStrings.isEmpty ());
  }
  else
    return false;

  return true;
}

void SmileLabel::setSmileText(const QStringList & list)
{
  m_smileStrings = list;

  if(!m_smileStrings.isEmpty () && m_movie->isValid() && !m_filename.isEmpty())
  {
    setToolTip(m_smileStrings[0]);
    m_inited = true;
  }
  else
    m_inited = false;
}


void SmileLabel::mouseMoveEvent(QMouseEvent* ev)
{
  QPainter painter;

  if(!isVisible())
    return;

  if(ev->x() <= 0 || ev->x() >= width() - 1 || ev->y() <= 0 || ev->y() >= height() - 1)
  {
    setMovie(m_movie);
    m_movie->stop();
    m_selected = false;
  }
  else
  {
    m_movie->jumpToFrame(0);
    if(m_movie->format() == QString("gif").toAscii() || m_movie->format() == QString("mng").toAscii())
    {
      setMovie(m_movie);
      m_movie->start();
    }
    else
    {
      QPixmap pix(width(), height());
      QPixmap mask(width(), height());

      pix = m_movie->currentPixmap();

      mask.fill(Qt::white);

      QPixmap tmp(width(), height());

      int trans = 150;

      tmp.fill(QColor(trans, trans, trans));
      mask.setAlphaChannel(tmp);

      painter.begin(&pix);

      painter.drawPixmap(0, 0, mask);

      painter.end();

      setPixmap(pix);
    }

    m_selected = true;

    emit hovered();
  }
}

void SmileLabel::mousePressEvent(QMouseEvent * ev)
{
  if(m_inited)
   emit clicked(m_smileStrings[0]);

  setMovie(m_movie);
  ev->accept();
}

int SmileLabel::pixmapWidth()
{
  return m_movie->currentPixmap().width();
}

int SmileLabel::pixmapHeight()
{
  return m_movie->currentPixmap().height();
}

void SmileLabel::unselect()
{
  if(m_selected)
  {
    setMovie(m_movie);
    m_movie->stop();
    m_selected = false;
  }
}