add a directory choose, to be used in the preferences

Author: PhilippSalvisberg

sqldev/src/main/java/org/utplsql/sqldev/DirectoryChooser.xtend

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2018 Philipp Salvisberg <philipp.salvisberg@trivadis.com>
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.utplsql.sqldev
+
+import java.io.File
+import java.util.logging.Logger
+import javax.swing.JComboBox
+import javax.swing.JFileChooser
+import javax.swing.JFrame
+import javax.swing.JTextField
+
+class DirectoryChooser {
+	val static Logger logger = Logger.getLogger(DirectoryChooser.name)
+
+	def static choose (JFrame parentFrame, String title, String initialDirectory) {
+		logger.finest('''parantFrame: «parentFrame»''')
+		var String ret = null
+		val chooser = new JFileChooser()
+		chooser.currentDirectory = new File(initialDirectory)
+		chooser.dialogTitle = title
+		chooser.fileSelectionMode = JFileChooser.DIRECTORIES_ONLY
+		chooser.acceptAllFileFilterUsed = false
+		if (chooser.showOpenDialog(parentFrame) == JFileChooser.APPROVE_OPTION) {
+			ret = chooser.selectedFile.absolutePath
+		}
+		return ret
+	}
+
+	def static void choose (JFrame parentFrame, String title, JTextField textField) {
+		val dir = choose(parentFrame, title, textField.text)
+		if (dir !== null) {
+			textField.text = dir
+		}
+	}
+
+	def static void choose (JFrame parentFrame, String title, JComboBox<String> comboBox) {
+		val dir = choose(parentFrame, title, comboBox.editor.item as String);
+		if (dir !== null) {
+			comboBox.editor.item = dir
+		}
+	}	
+
+}