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/*
* imageeditor.cpp
*
* (c) 2003-2004,2008-2010 by Jeremy Bowman <jmbowman@alum.mit.edu>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
/** @file imageeditor.cpp
* Source file for ImageEditor
*/
#include <QApplication>
#include <QComboBox>
#include <QDialogButtonBox>
#include <QImageReader>
#include <QLabel>
#include <QMatrix>
#include <QMessageBox>
#include <QPixmap>
#include <QPushButton>
#include <QScrollArea>
#include <QSpinBox>
#include <QWidget>
#include "imageeditor.h"
#include "imagewidget.h"
#include "../factory.h"
/**
* Constructor.
*
* @param parent This dialog's parent widget
*/
ImageEditor::ImageEditor(QWidget *parent)
: PBDialog(tr("Image Editor"), parent), path("")
{
paramsRow = new QWidget(this);
QHBoxLayout *hbox = Factory::hBoxLayout(paramsRow, true);
vbox->addWidget(paramsRow);
hbox->addWidget(new QLabel(tr("Width"), paramsRow));
widthBox = new QSpinBox(paramsRow);
widthBox->setRange(1, 800);
hbox->addWidget(widthBox);
hbox->addWidget(new QLabel(tr("Height"), paramsRow));
heightBox = new QSpinBox(paramsRow);
heightBox->setRange(1, 600);
hbox->addWidget(heightBox);
hbox->addWidget(new QLabel(tr("Rotate"), paramsRow));
rotateBox = new QComboBox(paramsRow);
hbox->addWidget(rotateBox);
rotateBox->addItem("0");
rotateBox->addItem("90");
rotateBox->addItem("180");
rotateBox->addItem("270");
QPushButton *refreshButton = new QPushButton(tr("Refresh"), paramsRow);
hbox->addWidget(refreshButton);
connect(refreshButton, SIGNAL(clicked()), this, SLOT(updateImage()));
QScrollArea *scroll = new QScrollArea(this);
vbox->addWidget(scroll);
display = new ImageWidget(scroll);
scroll->setWidget(display);
QPixmap pm;
display->setPixmap(pm);
okCancelRow = finishLayout();
}
/**
* Open in this dialog the image contained in the specified file.
*
* @param file The path to a JPEG or PNG image file
*/
int ImageEditor::edit(const QString &file)
{
path = file;
QImageReader reader(file);
format = reader.format().toUpper();
QSize size = reader.size();
oldWidth = size.width();
oldHeight = size.height();
int width = oldWidth;
int height = oldHeight;
// Scale the image down so as to not swamp devices with limited memory when
// loaded (only works for JPEGs, big PNG images will be rejected)
int scaleDenom = 1;
while (width * height > 800 * 600) {
scaleDenom *= 2;
// I doubt if many people have 6400 x 4800 images, but it's probably
// only a matter of time before digital cameras get there...
if (scaleDenom > 8 || format != "JPEG") {
QMessageBox::warning(this, qApp->applicationName(),
tr("Image is too large to import"));
return QDialog::Rejected;
}
width /= 2;
height /= 2;
}
widthBox->setMaximum(width);
widthBox->setValue(width);
heightBox->setMaximum(height);
heightBox->setValue(height);
rotateBox->setCurrentIndex(0);
reader.setScaledSize(QSize(width, height));
image = reader.read();
qApp->processEvents();
QPixmap pm = QPixmap::fromImage(image);
display->setPixmap(pm);
int margin = 5;
#if defined(Q_WS_WIN)
margin += 16;
#endif
resize(qMax(pm.width() + margin, paramsRow->sizeHint().width() + margin),
paramsRow->height() + pm.height() + okCancelRow->height() + margin);
return exec();
}
/**
* Update the displayed image with any changes made to the settings (size,
* rotation, etc.)
*/
void ImageEditor::updateImage()
{
int width = widthBox->value();
int height = heightBox->value();
int angle = rotateBox->currentIndex() * 90;
QImageReader reader(path);
reader.setScaledSize(QSize(width, height));
image = reader.read();
if (angle) {
QMatrix matrix;
matrix.rotate(angle);
image = image.transformed(matrix);
}
qApp->processEvents();
QPixmap pm = QPixmap::fromImage(image);
display->setPixmap(pm);
}
/**
* Get the image as it's currently displayed.
*
* @return The currently shown image
*/
QImage ImageEditor::getImage()
{
return image;
}
/**
* Get the path to the file from which the current image was loaded.
*
* @return The path to the image file
*/
QString ImageEditor::getFile()
{
return path;
}
/**
* A string representing the original format of the current image, typically
* either "JPEG" or "PNG".
*
* @return The short name of the current image's format
*/
QString ImageEditor::getFormat()
{
return format;
}
/**
* Determine if any changes to the image have been specified.
*
* @return True if the image has been modified, false otherwise
*/
bool ImageEditor::isModified()
{
if (rotateBox->currentIndex() != 0) {
return true;
}
if (widthBox->value() != oldWidth || heightBox->value() != oldHeight) {
return true;
}
return false;
}
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