imageviewer.cpp
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright 2012 The MITRE Corporation *
* *
* Licensed under the Apache License, Version 2.0 (the "License"); *
* you may not use this file except in compliance with the License. *
* You may obtain a copy of the License at *
* *
* http://www.apache.org/licenses/LICENSE-2.0 *
* *
* Unless required by applicable law or agreed to in writing, software *
* distributed under the License is distributed on an "AS IS" BASIS, *
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
* See the License for the specific language governing permissions and *
* limitations under the License. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#include <QFileDialog>
#include <QSizePolicy>
#include <QTimer>
#include "imageviewer.h"
/*** PUBLIC ***/
br::ImageViewer::ImageViewer(QWidget *parent)
: QLabel(parent)
{
setAlignment(Qt::AlignCenter);
setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored);
}
void br::ImageViewer::setDefaultText(const QString &text, bool async)
{
defaultText = text;
updatePixmap(async);
}
void br::ImageViewer::setImage(const QString &file, bool async)
{
src = QImage(file);
updatePixmap(async);
}
void br::ImageViewer::setImage(const QImage &image, bool async)
{
src = image;
updatePixmap(async);
}
void br::ImageViewer::setImage(const QPixmap &pixmap, bool async)
{
src = pixmap.toImage();
updatePixmap(async);
}
/*** PRIVATE ***/
void br::ImageViewer::updatePixmap(bool async)
{
if (async) {
QTimer::singleShot(0, this, SLOT(updatePixmap()));
return;
}
if (src.isNull()) {
QLabel::setPixmap(QPixmap());
setText(defaultText);
} else {
QLabel::setPixmap(QPixmap::fromImage(src.scaled(size(), Qt::KeepAspectRatio)));
}
}
/*** PROTECTED SLOTS ***/
void br::ImageViewer::keyPressEvent(QKeyEvent *event)
{
QLabel::keyPressEvent(event);
if ((event->key() == Qt::Key_S) && (event->modifiers() == Qt::ControlModifier) && !src.isNull()) {
event->accept();
const QString fileName = QFileDialog::getSaveFileName(this, "Save Image");
if (!fileName.isEmpty()) src.save(fileName);
}
}
void br::ImageViewer::mouseMoveEvent(QMouseEvent *event)
{
QLabel::mouseMoveEvent(event);
event->accept();
setFocus();
}
void br::ImageViewer::resizeEvent(QResizeEvent *event)
{
QLabel::resizeEvent(event);
event->accept();
updatePixmap();
}