* @author Morris Jobke * @author Robin Appelman * @author Thomas Müller * @author Victor Dubiniuk * * @license AGPL-3.0 * * This code is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License, version 3, * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License, version 3, * along with this program. If not, see * */ namespace OC\DB; use Doctrine\DBAL\Schema\Schema; use Doctrine\DBAL\Schema\Table; class MySQLMigrator extends Migrator { /** * @param Schema $targetSchema * @param \Doctrine\DBAL\Connection $connection * @return \Doctrine\DBAL\Schema\SchemaDiff */ protected function getDiff(Schema $targetSchema, \Doctrine\DBAL\Connection $connection) { $platform = $connection->getDatabasePlatform(); $platform->registerDoctrineTypeMapping('enum', 'string'); $platform->registerDoctrineTypeMapping('bit', 'string'); $schemaDiff = parent::getDiff($targetSchema, $connection); // identifiers need to be quoted for mysql foreach ($schemaDiff->changedTables as $tableDiff) { $tableDiff->name = $this->connection->quoteIdentifier($tableDiff->name); foreach ($tableDiff->changedColumns as $column) { $column->oldColumnName = $this->connection->quoteIdentifier($column->oldColumnName); } } return $schemaDiff; } /** * Speed up migration test by disabling autocommit and unique indexes check * * @param \Doctrine\DBAL\Schema\Table $table * @throws \OC\DB\MigrationException */ protected function checkTableMigrate(Table $table) { $this->connection->exec('SET autocommit=0'); $this->connection->exec('SET unique_checks=0'); try { parent::checkTableMigrate($table); } catch (\Exception $e) { $this->connection->exec('SET unique_checks=1'); $this->connection->exec('SET autocommit=1'); throw new MigrationException($table->getName(), $e->getMessage()); } $this->connection->exec('SET unique_checks=1'); $this->connection->exec('SET autocommit=1'); } } ='chore-readme-8-14-4'>chore-readme-8-14-4 Vaadin 6, 7, 8 is a Java framework for modern Java web applications: https://github.com/vaadin/frameworkwww-data
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---
title: Changing Theme On The Fly
order: 60
layout: page
---

[[changing-theme-on-the-fly]]
Changing theme on the fly
-------------------------

Starting from Vaadin 7.3, you can change themes in the application
without reloading the page. To do this, simply use the
`UI.setTheme(String)` method.

[source,java]
....
public class ThemeChangeUI extends UI {

  private String[] themes = { "valo", "reindeer", "runo", "chameleon" };

  @Override
  protected void init(VaadinRequest request) {
    ComboBox themePicker = new ComboBox("Theme", Arrays.asList(themes));
    themePicker.setValue(getTheme());

    themePicker.addValueChangeListener(new ValueChangeListener() {
      @Override
      public void valueChange(ValueChangeEvent event) {
        String theme = (String) event.getProperty().getValue();
        setTheme(theme);
      }
    });

    setContent(themePicker);
  }
}
....

In this way, you can let your users choose the look of your application.
The functionality also makes it easier to create applications that are
branded for different customers.