/*******************************************************************************
    * jArduino: Arduino C++ Code Generation From Java
    * Copyright 2020 Tony Washer
    *
    * 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 net.sourceforge.jarduino.gui;
  
  import java.awt.BorderLayout;
  import java.awt.Dimension;
  import javax.swing.JComponent;
  import javax.swing.JEditorPane;
  import javax.swing.JPanel;
  import javax.swing.JScrollPane;
  import javax.swing.JSplitPane;
  import javax.swing.JTree;
  import javax.swing.tree.DefaultMutableTreeNode;
  import javax.swing.tree.DefaultTreeModel;
  import javax.swing.tree.TreePath;
  import javax.swing.tree.TreeSelectionModel;
  
  import net.sourceforge.jarduino.ArduinoException;
  
  /**
   * Help Panel.
   */
  public class ArduinoPanelHelp {
      /**
       * The Default Width.
       */
      static final int WIDTH = 600;
  
      /**
       * The splitPane.
       */
      private final JSplitPane thePane;
  
      /**
       * The help text.
       */
      private final JEditorPane theHelp;
  
      /**
       * Constructor.
       * @throws ArduinoException on error
       */
      ArduinoPanelHelp() throws ArduinoException {
          /* Create the TextPane */
          theHelp = new JEditorPane();
          theHelp.setEditable(false);
          theHelp.setContentType("text/html");
  
          /* Create the treeModel */
          final DefaultMutableTreeNode myRoot = new DefaultMutableTreeNode("Root");
          for (ArduinoHelp myId : ArduinoHelp.values()) {
              myRoot.add(new DefaultMutableTreeNode(myId));
          }
          final DefaultTreeModel myModel = new DefaultTreeModel(myRoot);
  
          /* Create the tree */
          final JTree myTree = new JTree(myModel);
          myTree.setEditable(false);
          myTree.setRootVisible(false);
          myTree.setExpandsSelectedPaths(true);
  
          /* Handle selection */
          final TreeSelectionModel mySelect = myTree.getSelectionModel();
          mySelect.setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
          mySelect.addTreeSelectionListener(e -> {
              final DefaultMutableTreeNode myNode = (DefaultMutableTreeNode) e.getNewLeadSelectionPath().getLastPathComponent();
              final ArduinoHelp../../../net/sourceforge/jarduino/gui/ArduinoHelp.html#ArduinoHelp">ArduinoHelp myId = (ArduinoHelp) myNode.getUserObject();
              theHelp.setText(myId.getHTML());
              theHelp.setCaretPosition(0);
          });
  
          /* Set Dimensions */
          final JScrollPane myScroll = new JScrollPane(theHelp);
          myScroll.setPreferredSize(new Dimension(WIDTH, ArduinoPanelMain.HEIGHT));
  
          /* Create the Panel */
          final JPanel myPanel = new JPanel(new BorderLayout());
          myPanel.add(myScroll, BorderLayout.CENTER);
  
          /* Load the help */
          ArduinoHelp.loadAllHelp();
  
          /* Select the overview */
          final TreePath myPath = new TreePath(((DefaultMutableTreeNode) myRoot.getFirstChild()).getPath());
          mySelect.setSelectionPath(myPath);
 
         /* Create a splitPane */
         thePane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT);
         thePane.setLeftComponent(new JScrollPane(myTree));
         thePane.setRightComponent(myPanel);
         thePane.setResizeWeight(ArduinoTableNodeConnect.THIRD_WEIGHT);
     }
 
     /**
      * Obtain the component.
      * @return the component
      */
     JComponent getComponent() {
         return thePane;
     }
 }