cxMultiFileInputWidget.cpp

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/*=========================================================================
This file is part of CustusX, an Image Guided Therapy Application.

Copyright (c) 2008-2014, SINTEF Department of Medical Technology
All rights reserved.

Redistribution and use in source and binary forms, with or without 
modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, 
   this list of conditions and the following disclaimer.

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.

3. Neither the name of the copyright holder nor the names of its contributors 
   may be used to endorse or promote products derived from this software 
   without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
=========================================================================*/
#include "cxMultiFileInputWidget.h"

#include <QtWidgets>

#include <iostream>

namespace cx
{


MultiFileInputWidget::MultiFileInputWidget(QWidget* parent) : QWidget(parent)
{
        mBasePath = "~";
        mUseRelativePath = false;
        mDescription = NULL;
        mBrowseButton = NULL;
        mFilenameEdit = NULL;

        mLayout = new QGridLayout(this);
        mLayout->setMargin(0);

        mFilenameEdit = new QTextEdit(this);
        mFilenameEdit->setToolTip("File names");
//      connect(mFilenameEdit, SIGNAL(editingFinished()), this, SIGNAL(fileChanged()));
//      connect(mFilenameEdit, SIGNAL(textChanged(const QString&)), this, SLOT(updateColor()));
        connect(mFilenameEdit, SIGNAL(textChanged()), this, SLOT(evaluateTextChanges()));
        mLayout->addWidget(mFilenameEdit, 0, 1);

        mBrowseAction = new QAction(QIcon(":/icons/open.png"), "Browse", this);
        mBrowseAction->setStatusTip("Browse the file system");
        connect(mBrowseAction, SIGNAL(triggered()), this, SLOT(browse()));

        mBrowseButton = new QToolButton();
        mBrowseButton->setDefaultAction(mBrowseAction);
        mLayout->addWidget(mBrowseButton, 0, 2);
}

void MultiFileInputWidget::setDescription(QString text)
{
        if (!mDescription)
        {
                mDescription = new QLabel(this);
                mLayout->addWidget(mDescription, 0,0);
        }

        mDescription->setText(text);
}

void MultiFileInputWidget::setFilenames(QStringList text)
{
        QStringList files = this->convertToAbsoluteFilenames(text);
        QStringList original = this->getAbsoluteFilenames();
//      QStringList original = this->convertToAbsoluteFilenames(mFilenameEdit->text().split('\n'));
        if (files==original)
                return;

        QString output = this->convertFilenamesToTextEditText(files);
        mFilenameEdit->setText(output);

//      if (mUseRelativePath)
//              text = QDir(mBasePath).relativeFilePath(text);
//
//      if (text==mFilenameEdit->text())
//              return;
//      mFilenameEdit->setText(text);
        this->widgetHasBeenChanged();
}

QStringList MultiFileInputWidget::convertToAbsoluteFilenames(QStringList text) const
{
        QStringList retval;
        for (unsigned i=0; i<text.size(); ++i)
                retval << this->convertToAbsoluteFilename(text[i]);
        return retval;
}
QString MultiFileInputWidget::convertToAbsoluteFilename(QString text) const
{
        if (text.isEmpty())
                return text;
        QString absolute = QDir(mBasePath).absoluteFilePath(text.trimmed());
        QString cleaned = QDir().cleanPath(absolute);
        if (!QFileInfo(cleaned).exists())
                return text; // return nonexistent files unchanged.
        return cleaned;
}
QString MultiFileInputWidget::convertFilenamesToTextEditText(QStringList files) const
{
        QStringList retval;
        for (unsigned i=0; i<files.size(); ++i)
        {
                retval << this->convertToPresentableFilename(files[i]);
        }
        return retval.join("\n");
}

QString MultiFileInputWidget::convertToPresentableFilename(QString absoluteFilename) const
{
        QString retval = absoluteFilename;
        if (!QFileInfo(absoluteFilename).exists())
                return retval;

        if (mUseRelativePath)
        {
                retval = QDir(mBasePath).relativeFilePath(absoluteFilename);
                if (retval.isEmpty())
                        retval = "./"; // in order to separate from empty string (which appears during editing and should be ignored)
        }


        return retval;
}

void MultiFileInputWidget::widgetHasBeenChanged()
{
        this->updateHelpInternal();
        this->updateColor();
        emit fileChanged();
}

void MultiFileInputWidget::setHelp(QString text)
{
        mBaseHelp = text;
        this->updateHelpInternal();
}

void MultiFileInputWidget::updateHelpInternal()
{
        QString files = this->getAbsoluteFilenames().join("\n");
        QString text = QString("%1\n\n%2").arg(mBaseHelp).arg(files);
        mFilenameEdit->setToolTip(text);
        mFilenameEdit->setStatusTip(text);
}

void MultiFileInputWidget::setBrowseHelp(QString text)
{
        mBrowseAction->setToolTip(text);
        mBrowseAction->setStatusTip(text);
}

void MultiFileInputWidget::setBasePath(QString path)
{
        mBasePath = path;
        this->widgetHasBeenChanged();
}

void MultiFileInputWidget::browse()
{
        QString text = "Select file";
        if (mUseRelativePath)
                text = QString("Select file relative to %1").arg(mBasePath);

        QString filename = QFileDialog::getExistingDirectory(this, text, mBasePath);
        if (filename.isEmpty())
                return;
//      QString filename = QFileDialog::getOpenFileName(this, text, mBasePath);
//      if (filename.isEmpty())
//              return;

//      if (mUseRelativePath)
//              filename = QDir(mBasePath).relativeFilePath(filename);

        QStringList files = this->getAbsoluteFilenames();
        files << filename;
        this->setFilenames(files);
}

QStringList MultiFileInputWidget::getFilenames() const
{
        return mFilenameEdit->toPlainText().split('\n');
}

QStringList MultiFileInputWidget::getAbsoluteFilenames() const
{
        return this->convertToAbsoluteFilenames(mFilenameEdit->toPlainText().split("\n"));
//      QString absolute = QDir(mBasePath).absoluteFilePath(this->getFilename().trimmed());
//      QString cleaned = QDir().cleanPath(absolute);
//      return cleaned;
}

void MultiFileInputWidget::setUseRelativePath(bool on)
{
        mUseRelativePath = on;
        this->widgetHasBeenChanged();
}

void MultiFileInputWidget::evaluateTextChanges()
{
        this->updateHelpInternal();
        this->updateColor();
        QStringList current = this->getAbsoluteFilenames();
        if (current!=mLastFilenames)
        {
                mLastFilenames = current;
                emit fileChanged();
        }
}

void MultiFileInputWidget::updateColor()
{
        mFilenameEdit->blockSignals(true);
        QTextCursor cursor = mFilenameEdit->textCursor();
        int pos = cursor.position();

        QStringList org = mFilenameEdit->toPlainText().split("\n");
        mFilenameEdit->setPlainText("");
        for (int i=0; i<org.size(); ++i)
        {
                bool exists = QFileInfo(this->convertToAbsoluteFilename(org[i])).exists();

                if (exists)
                        mFilenameEdit->setTextColor(QColor("black"));
                else
                        mFilenameEdit->setTextColor(QColor("red"));
                if (i!=0)
                        mFilenameEdit->textCursor().insertText("\n");
                mFilenameEdit->textCursor().insertText(org[i]);
        }

        cursor.setPosition(pos);

//      QTextBlockFormat red;
//      red.setProperty(QTextFormat::ForegroundBrush, QBrush(QColor("red")));
//      cursor.mergeBlockFormat(red);
        mFilenameEdit->setTextCursor(cursor);
        mFilenameEdit->blockSignals(false);

//      QColor color = QColor("black");
//      if (!QFileInfo(this->getAbsoluteFilename()).exists())
//              color = QColor("red");
//
//      QPalette p = mFilenameEdit->palette();
//      p.setColor(QPalette::Text, color);
//      mFilenameEdit->setPalette(p);
}

} /* namespace cx */