view widgets/ImageDialog.cpp @ 1160:a429b2acb45d 3.0-integration

Make SVDEBUG always write to a log file -- formerly this was disabled in NDEBUG builds. I think there's little use to that, it just means that we keep adding more cerr debug output because we aren't getting the log we need. And SVDEBUG logging is not usually used in tight loops, I don't think the performance overhead is too serious.

Also update the About box.

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2007 QMUL.
    
    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.  See the file
    COPYING included with this distribution for more information.
*/

#include "ImageDialog.h"

#include <QLineEdit>
#include <QGridLayout>
#include <QLabel>
#include <QDialogButtonBox>
#include <QPushButton>
#include <QGroupBox>
#include <QDesktopWidget>
#include <QApplication>
#include <QUrl>
#include <QMessageBox>

#include "ProgressDialog.h"

#include "data/fileio/FileSource.h"
#include "InteractiveFileFinder.h"

#include <iostream>

ImageDialog::ImageDialog(QString title,
                         QString image,
                         QString label,
                         QWidget *parent) :
    QDialog(parent),
    m_imagePreview(0),
    m_remoteFile(0)
{
    setWindowTitle(title);
    
    QGridLayout *grid = new QGridLayout;
    setLayout(grid);

    QGroupBox *databox = new QGroupBox(tr("Image"));

    QGridLayout *subgrid = new QGridLayout;
    databox->setLayout(subgrid);

    int row = 0;

    subgrid->addWidget(new QLabel(tr("Label:")), row, 0);

    m_labelEdit = new QLineEdit;
    subgrid->addWidget(m_labelEdit, row, 1, 1, 2);

    ++row;

    subgrid->addWidget(new QLabel(tr("File or URL:")), row, 0);

    m_imageEdit = new QLineEdit;
    subgrid->addWidget(m_imageEdit, row, 1, 1, 1);

    connect(m_imageEdit, SIGNAL(textEdited(const QString &)),
            this, SLOT(imageEditEdited(const QString &)));
    connect(m_imageEdit, SIGNAL(editingFinished()),
            this, SLOT(imageEditEdited()));

    QPushButton *browse = new QPushButton(tr("Browse..."));
    connect(browse, SIGNAL(clicked()), this, SLOT(browseClicked()));
    subgrid->addWidget(browse, row, 2, 1, 1);

    ++row;

    QGroupBox *previewbox = new QGroupBox(tr("Preview"));
    
    subgrid = new QGridLayout;
    previewbox->setLayout(subgrid);

    m_imagePreview = new QLabel;
    m_imagePreview->setAlignment(Qt::AlignCenter);
    subgrid->addWidget(m_imagePreview, 0, 0);

    m_imagePreview->setMinimumSize(QSize(100, 100));

    QDesktopWidget *desktop = QApplication::desktop();
    m_imagePreview->setMaximumSize(QSize((desktop->width() * 2) / 3,
                                         (desktop->height() * 2) / 3));

    grid->addWidget(databox, 0, 0);
    grid->addWidget(previewbox, 1, 0);

    grid->setRowStretch(1, 10);

    QDialogButtonBox *bb = new QDialogButtonBox(QDialogButtonBox::Ok |
                                                QDialogButtonBox::Cancel);
    grid->addWidget(bb, 2, 0, 1, 1);
    connect(bb, SIGNAL(accepted()), this, SLOT(accept()));
    connect(bb, SIGNAL(rejected()), this, SLOT(reject()));

    m_okButton = bb->button(QDialogButtonBox::Ok);
    m_okButton->setEnabled(false);

    if (image != "") setImage(image);
    if (label != "") setLabel(label);
}

ImageDialog::~ImageDialog()
{
    delete m_remoteFile;
}

QString
ImageDialog::getImage()
{
    return m_loadedImageFile;
}

QPixmap
ImageDialog::getPixmap()
{
    return m_loadedImage;
}

QString
ImageDialog::getLabel()
{
    return m_labelEdit->text();
}

void
ImageDialog::setImage(QString image)
{
    m_imageEdit->setText(image);
    updatePreview();
}

void
ImageDialog::setLabel(QString label)
{
    m_labelEdit->setText(label);
}

void
ImageDialog::resizeEvent(QResizeEvent *)
{
    updatePreview();
}

void
ImageDialog::imageEditEdited(const QString &s)
{
    if (s.startsWith("http:") || s.startsWith("ftp:")) {
        return;
    }
    updatePreview();
}

void
ImageDialog::imageEditEdited()
{
    updatePreview();
}

void
ImageDialog::updatePreview()
{
    if (!m_imagePreview) return;

    QString img = m_imageEdit->text();

    m_okButton->setEnabled(img != "");

    if (img != m_loadedImageFile) {

        QString fileName = img;
        delete m_remoteFile;
        m_remoteFile = 0;

        if (FileSource::isRemote(fileName)) {
            QUrl url(fileName);
            if (!FileSource::canHandleScheme(url)) {
                QMessageBox::critical(this, tr("Unsupported scheme in URL"),
                                      tr("The URL scheme \"%1\" is not supported")
                                      .arg(url.scheme()));
            } else {
                
                ProgressDialog dialog(tr("Opening image URL..."), true, 2000);
                m_remoteFile = new FileSource(url, &dialog);
                m_remoteFile->waitForData();
                if (!m_remoteFile->isOK()) {
                    QMessageBox::critical(this, tr("File download failed"),
                                          tr("Failed to download URL \"%1\": %2")
                                          .arg(url.toString()).arg(m_remoteFile->getErrorString()));
                    delete m_remoteFile;
                    m_remoteFile = 0;
                } else {
                    fileName = m_remoteFile->getLocalFilename();
                }
            }
        }
        
//        cerr << "image filename: \"" << fileName << "\"" << endl;

        m_loadedImage = QPixmap(fileName);
        m_loadedImageFile = img;
    }

    QSize sz(m_imagePreview->size());
    int m = m_imagePreview->margin() * 2;
    sz -= QSize(m, m);

    if (m_loadedImage.isNull()) {
        m_imagePreview->setPixmap(QPixmap());
    } else {
        m_imagePreview->setPixmap(m_loadedImage.scaled
                                  (sz,
                                   Qt::KeepAspectRatio,
                                   Qt::SmoothTransformation));
    }
}

void
ImageDialog::browseClicked()
{
    QString file =
        InteractiveFileFinder::getInstance()->getOpenFileName(FileFinder::ImageFile);

    if (file != "") {
        setImage(file);
        emit imageChanged(file);
    }
}