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blazekblazek
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new class QgsNewNameDialog - ask for a new name showing conflicts with existing names
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‎src/gui/qgsnewnamedialog.cpp

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/***************************************************************************
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qgsnewnamedialog.cpp
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-------------------
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begin : May, 2015
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copyright : (C) 2015 Radim Blazek
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email : radim.blazek@gmail.com
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#include <QLabel>
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#include <QLineEdit>
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#include <QPushButton>
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#include <QRegExpValidator>
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#include <QSizePolicy>
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#include "qgslogger.h"
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#include "qgsnewnamedialog.h"
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QgsNewNameDialog::QgsNewNameDialog(const QString& source, const QString& initial,
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const QStringList& extensions, const QStringList& existing,
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const QRegExp& regexp, Qt::CaseSensitivity cs,
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QWidget *parent, Qt::WindowFlags flags )
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: QgsDialog(parent, flags, QDialogButtonBox::Ok | QDialogButtonBox::Cancel)
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, mExiting(existing)
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, mExtensions(extensions)
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, mCaseSensitivity(cs)
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, mNamesLabel(0)
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{
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setWindowTitle( tr("New name") );
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QDialog::layout()->setSizeConstraint(QLayout::SetMinimumSize);
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layout()->setSizeConstraint(QLayout::SetMinimumSize);
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mOkString = buttonBox()->button(QDialogButtonBox::Ok)->text();
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QString hintString;
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QString nameDesc = mExtensions.isEmpty() ? tr("name") : tr("base name");
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if ( source.isEmpty() )
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{
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hintString = tr("Enter new %1").arg(nameDesc);
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}
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else
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{
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hintString = tr("Enter new %1 for %2").arg(nameDesc).arg(source);
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}
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QLabel* hintLabel = new QLabel( hintString, this );
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layout()->addWidget( hintLabel );
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mLineEdit = new QLineEdit( initial, this );
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if ( !regexp.isEmpty() )
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{
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QRegExpValidator *validator = new QRegExpValidator( regexp, this );
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mLineEdit->setValidator( validator );
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}
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connect( mLineEdit, SIGNAL( textChanged( QString ) ), this, SLOT( nameChanged() ) );
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layout()->addWidget( mLineEdit );
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mNamesLabel = new QLabel( " ", this );
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mNamesLabel->setSizePolicy(QSizePolicy::Minimum,QSizePolicy::Minimum);
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if ( !mExtensions.isEmpty() )
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{
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mNamesLabel->setWordWrap(true);
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layout()->addWidget( mNamesLabel );
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}
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mErrorLabel = new QLabel( " ", this );
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mErrorLabel->setSizePolicy(QSizePolicy::Minimum,QSizePolicy::Minimum);
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mErrorLabel->setWordWrap(true);
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layout()->addWidget( mErrorLabel );
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nameChanged();
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}
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QString QgsNewNameDialog::highlightText(const QString& text)
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{
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return "<b>" + text + "</b>";
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}
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void QgsNewNameDialog::nameChanged()
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{
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QgsDebugMsg( "entered" );
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QString namesString = tr("Full names") + ": ";
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if ( !mExtensions.isEmpty() )
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{
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mNamesLabel->setText( namesString );
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}
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mErrorLabel->setText( " " ); // space to keep vertical space
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QPushButton* okButton = buttonBox()->button(QDialogButtonBox::Ok);
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okButton->setText( mOkString );
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okButton->setEnabled( true );
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QString newName = name();
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if ( newName.length() == 0 )
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{
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//mErrorLabel->setText( highlightText( tr( "Enter new name" ) );
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okButton->setEnabled( false );
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return;
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}
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QStringList newNames = fullNames(newName, mExtensions);
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if ( !mExtensions.isEmpty() )
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{
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namesString += " " + newNames.join(", ");
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mNamesLabel->setText( namesString );
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}
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QStringList conflicts = matching(newNames, mExiting, mCaseSensitivity );
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if ( !conflicts.isEmpty() )
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{
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mErrorLabel->setText( highlightText( tr( "Name(s) %1 exists", 0, conflicts.size()).arg( conflicts.join(", ") ) ) );
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okButton->setText( tr( "Overwrite" ) );
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return;
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}
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}
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QString QgsNewNameDialog::name() const
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{
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return mLineEdit->text().trimmed();
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}
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QStringList QgsNewNameDialog::fullNames(const QString& name, const QStringList& extensions)
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{
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QStringList list;
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foreach ( QString ext, extensions)
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{
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list << name + ext;
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}
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if ( list.isEmpty() )
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{
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list << name;
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}
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return list;
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}
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QStringList QgsNewNameDialog::matching(const QStringList& newNames, const QStringList& existingNames,
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Qt::CaseSensitivity cs)
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{
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QStringList list;
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foreach ( QString newName, newNames)
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{
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foreach ( QString existingName, existingNames)
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{
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if ( existingName.compare(newName, cs) == 0 )
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{
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list << existingName;
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}
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}
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}
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return list;
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}
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bool QgsNewNameDialog::exists(const QString& name, const QStringList& extensions,
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const QStringList& existing, Qt::CaseSensitivity cs)
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{
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QStringList newNames = fullNames(name, extensions);
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QStringList conflicts = matching(newNames, existing, cs );
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return conflicts.size() > 0;
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}

‎src/gui/qgsnewnamedialog.h

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/***************************************************************************
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qgsnewnamedialog.h
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-------------------
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begin : May, 2015
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copyright : (C) 2015 Radim Blazek
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email : radim.blazek@gmail.com
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#ifndef QGSNEWNAMEDIALOG_H
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#define QGSNEWNAMEDIALOG_H
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class QLabel;
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class QLineEdit;
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#include "qgsdialog.h"
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/** \ingroup gui
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* New name, for example new layer name dialog. If existing names are provided,
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* the dialog warns users if an entered name already exists.
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* @note added in 2.10
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*/
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class GUI_EXPORT QgsNewNameDialog : public QgsDialog
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{
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Q_OBJECT
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public:
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/** New dialog constructor.
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* @param source original data source name, e.g. original layer name of the layer to be copied
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* @param initial initial name
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* @param extensions base name extensions, e.g. raster base name band extensions or vector layer type extensions
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* @param existing existing names
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* @param regexp regular expression to be used as validator, for example db tables should have "[A-Za-z_][A-Za-z0-9_]+"
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* @param cs case sensitivity for new name to existing names comparison
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* @param parent
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* @param flags
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*/
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QgsNewNameDialog( const QString& source = QString::null, const QString& initial = QString::null,
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const QStringList& extensions = QStringList(), const QStringList& existing = QStringList(),
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const QRegExp& regexp = QRegExp(), Qt::CaseSensitivity cs = Qt::CaseSensitive,
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QWidget *parent = 0, Qt::WindowFlags flags = QgisGui::ModalDialogFlags );
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/** Name entered by user.
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* @return new name
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*/
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QString name() const;
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/** Test if name or name with at least one extension exists.
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* @param name name or base name
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* @param extensions base name extensions
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* @param existing existing names
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* @return true if name exists
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*/
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static bool exists(const QString& name, const QStringList& extensions,
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const QStringList& existing, Qt::CaseSensitivity cs = Qt::CaseSensitive );
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public slots:
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void nameChanged();
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protected:
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QStringList mExiting;
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QStringList mExtensions;
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Qt::CaseSensitivity mCaseSensitivity;
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QLineEdit *mLineEdit;
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QLabel *mNamesLabel; // list of names with extensions
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QLabel *mErrorLabel;
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QString mOkString;
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QString highlightText(const QString& text);
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static QStringList fullNames(const QString& name, const QStringList& extensions);
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// get list of existing names
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static QStringList matching(const QStringList& newNames, const QStringList& existingNames,
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Qt::CaseSensitivity cs = Qt::CaseSensitive);
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};
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#endif // QGSNEWNAMEDIALOG_H

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