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new class QgsNewNameDialog - ask for a new name showing conflicts wit…
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…h existing names
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@blazek
blazek committed May 16, 2015
1 parent ece9a92 commit d88f77f
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167 changes: 167 additions & 0 deletions src/gui/qgsnewnamedialog.cpp
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/***************************************************************************
qgsnewnamedialog.cpp
-------------------
begin : May, 2015
copyright : (C) 2015 Radim Blazek
email : radim.blazek@gmail.com
***************************************************************************/
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/

#include <QLabel>
#include <QLineEdit>
#include <QPushButton>
#include <QRegExpValidator>
#include <QSizePolicy>

#include "qgslogger.h"
#include "qgsnewnamedialog.h"

QgsNewNameDialog::QgsNewNameDialog(const QString& source, const QString& initial,
const QStringList& extensions, const QStringList& existing,
const QRegExp& regexp, Qt::CaseSensitivity cs,
QWidget *parent, Qt::WindowFlags flags )
: QgsDialog(parent, flags, QDialogButtonBox::Ok | QDialogButtonBox::Cancel)
, mExiting(existing)
, mExtensions(extensions)
, mCaseSensitivity(cs)
, mNamesLabel(0)
{
setWindowTitle( tr("New name") );
QDialog::layout()->setSizeConstraint(QLayout::SetMinimumSize);
layout()->setSizeConstraint(QLayout::SetMinimumSize);
mOkString = buttonBox()->button(QDialogButtonBox::Ok)->text();
QString hintString;
QString nameDesc = mExtensions.isEmpty() ? tr("name") : tr("base name");
if ( source.isEmpty() )
{
hintString = tr("Enter new %1").arg(nameDesc);
}
else
{
hintString = tr("Enter new %1 for %2").arg(nameDesc).arg(source);
}
QLabel* hintLabel = new QLabel( hintString, this );
layout()->addWidget( hintLabel );

mLineEdit = new QLineEdit( initial, this );
if ( !regexp.isEmpty() )
{
QRegExpValidator *validator = new QRegExpValidator( regexp, this );
mLineEdit->setValidator( validator );
}
connect( mLineEdit, SIGNAL( textChanged( QString ) ), this, SLOT( nameChanged() ) );
layout()->addWidget( mLineEdit );

mNamesLabel = new QLabel( " ", this );
mNamesLabel->setSizePolicy(QSizePolicy::Minimum,QSizePolicy::Minimum);
if ( !mExtensions.isEmpty() )
{
mNamesLabel->setWordWrap(true);
layout()->addWidget( mNamesLabel );
}

mErrorLabel = new QLabel( " ", this );
mErrorLabel->setSizePolicy(QSizePolicy::Minimum,QSizePolicy::Minimum);
mErrorLabel->setWordWrap(true);
layout()->addWidget( mErrorLabel );

nameChanged();
}

QString QgsNewNameDialog::highlightText(const QString& text)
{
return "<b>" + text + "</b>";
}

void QgsNewNameDialog::nameChanged()
{
QgsDebugMsg( "entered" );

QString namesString = tr("Full names") + ": ";
if ( !mExtensions.isEmpty() )
{
mNamesLabel->setText( namesString );
}
mErrorLabel->setText( " " ); // space to keep vertical space
QPushButton* okButton = buttonBox()->button(QDialogButtonBox::Ok);
okButton->setText( mOkString );
okButton->setEnabled( true );

QString newName = name();

if ( newName.length() == 0 )
{
//mErrorLabel->setText( highlightText( tr( "Enter new name" ) );
okButton->setEnabled( false );
return;
}

QStringList newNames = fullNames(newName, mExtensions);
if ( !mExtensions.isEmpty() )
{
namesString += " " + newNames.join(", ");
mNamesLabel->setText( namesString );
}

QStringList conflicts = matching(newNames, mExiting, mCaseSensitivity );

if ( !conflicts.isEmpty() )
{
mErrorLabel->setText( highlightText( tr( "Name(s) %1 exists", 0, conflicts.size()).arg( conflicts.join(", ") ) ) );
okButton->setText( tr( "Overwrite" ) );
return;
}
}

QString QgsNewNameDialog::name() const
{
return mLineEdit->text().trimmed();
}

QStringList QgsNewNameDialog::fullNames(const QString& name, const QStringList& extensions)
{
QStringList list;
foreach ( QString ext, extensions)
{
list << name + ext;

}
if ( list.isEmpty() )
{
list << name;
}
return list;
}

QStringList QgsNewNameDialog::matching(const QStringList& newNames, const QStringList& existingNames,
Qt::CaseSensitivity cs)
{
QStringList list;

foreach ( QString newName, newNames)
{
foreach ( QString existingName, existingNames)
{
if ( existingName.compare(newName, cs) == 0 )
{
list << existingName;
}
}
}
return list;
}

bool QgsNewNameDialog::exists(const QString& name, const QStringList& extensions,
const QStringList& existing, Qt::CaseSensitivity cs)
{
QStringList newNames = fullNames(name, extensions);
QStringList conflicts = matching(newNames, existing, cs );
return conflicts.size() > 0;
}
80 changes: 80 additions & 0 deletions src/gui/qgsnewnamedialog.h
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/***************************************************************************
qgsnewnamedialog.h
-------------------
begin : May, 2015
copyright : (C) 2015 Radim Blazek
email : radim.blazek@gmail.com
***************************************************************************/
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/

#ifndef QGSNEWNAMEDIALOG_H
#define QGSNEWNAMEDIALOG_H

class QLabel;
class QLineEdit;

#include "qgsdialog.h"

/** \ingroup gui
* New name, for example new layer name dialog. If existing names are provided,
* the dialog warns users if an entered name already exists.
* @note added in 2.10
*/
class GUI_EXPORT QgsNewNameDialog : public QgsDialog
{
Q_OBJECT
public:
/** New dialog constructor.
* @param source original data source name, e.g. original layer name of the layer to be copied
* @param initial initial name
* @param extensions base name extensions, e.g. raster base name band extensions or vector layer type extensions
* @param existing existing names
* @param regexp regular expression to be used as validator, for example db tables should have "[A-Za-z_][A-Za-z0-9_]+"
* @param cs case sensitivity for new name to existing names comparison
* @param parent
* @param flags
*/
QgsNewNameDialog( const QString& source = QString::null, const QString& initial = QString::null,
const QStringList& extensions = QStringList(), const QStringList& existing = QStringList(),
const QRegExp& regexp = QRegExp(), Qt::CaseSensitivity cs = Qt::CaseSensitive,
QWidget *parent = 0, Qt::WindowFlags flags = QgisGui::ModalDialogFlags );

/** Name entered by user.
* @return new name
*/
QString name() const;

/** Test if name or name with at least one extension exists.
* @param name name or base name
* @param extensions base name extensions
* @param existing existing names
* @return true if name exists
*/
static bool exists(const QString& name, const QStringList& extensions,
const QStringList& existing, Qt::CaseSensitivity cs = Qt::CaseSensitive );
public slots:
void nameChanged();

protected:
QStringList mExiting;
QStringList mExtensions;
Qt::CaseSensitivity mCaseSensitivity;
QLineEdit *mLineEdit;
QLabel *mNamesLabel; // list of names with extensions
QLabel *mErrorLabel;
QString mOkString;
QString highlightText(const QString& text);
static QStringList fullNames(const QString& name, const QStringList& extensions);
// get list of existing names
static QStringList matching(const QStringList& newNames, const QStringList& existingNames,
Qt::CaseSensitivity cs = Qt::CaseSensitive);
};

#endif // QGSNEWNAMEDIALOG_H

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