content: package tim.prune.function.settings;
  
  import java.awt.BorderLayout;
  import java.awt.Component;
  import java.awt.Dimension;
  import java.awt.GridLayout;
  import javax.swing.BorderFactory;
  import javax.swing.Box;
  import javax.swing.BoxLayout;
  import javax.swing.JButton;
  import javax.swing.JDialog;
  import javax.swing.JLabel;
  import javax.swing.JPanel;
  
  import tim.prune.App;
  import tim.prune.GenericFunction;
  import tim.prune.I18nManager;
  import tim.prune.UpdateMessageBroker;
  import tim.prune.config.ColourScheme;
  import tim.prune.gui.colour.ColourChooser;
  import tim.prune.gui.colour.ColourPatch;
  import tim.prune.gui.colour.ColourerSelectorPanel;
  import tim.prune.gui.colour.PatchListener;
  import tim.prune.gui.colour.PointColourer;
  
  /**
   * Class to show the popup window for setting the colours
   */
  public class SetColours extends GenericFunction
  {
  	private JDialog _dialog = null;
  	private JButton _okButton = null;
  	/** Array of 8 colour patches */
  	private ColourPatch[] _patches = null;
  	/** colourer selection panel */
  	private ColourerSelectorPanel _colourerSelector = null;
  	/** Single colour chooser */
  	private ColourChooser _colourChooser = null;
  
  	/** Array of label keys for the 8 patches */
  	private static final String[] LABEL_KEYS = {"background", "primary", "point", "secondary",
  		"selection", "borders", "text", "lines"};
  	/** Array of indices for the 8 patches */
  	private static final int[] INDICES = {ColourScheme.IDX_BACKGROUND, ColourScheme.IDX_PRIMARY,
  		ColourScheme.IDX_POINT, ColourScheme.IDX_SECONDARY,
  		ColourScheme.IDX_SELECTION, ColourScheme.IDX_BORDERS,
  		ColourScheme.IDX_TEXT, ColourScheme.IDX_LINES
  	};
  
  
  	/**
  	 * Constructor
  	 * @param inApp app object
  	 */
  	public SetColours(App inApp) {
  		super(inApp);
  	}
  
  	/**
  	 * Return the name key for this function
  	 */
  	public String getNameKey() {
  		return "function.setcolours";
  	}
  
  	/**
  	 * @return the contents of the window as a Component
  	 */
  	private Component makeContents()
  	{
  		JPanel mainPanel = new JPanel();
  		mainPanel.setLayout(new BorderLayout(0, 10));
  
  		JLabel introLabel = new JLabel(I18nManager.getText("dialog.setcolours.intro"));
  		introLabel.setBorder(BorderFactory.createEmptyBorder(5, 5, 0, 0));
  		mainPanel.add(introLabel, BorderLayout.NORTH);
  
  		// Panel in centre, to hold both the patch panel and the colourer panel (and maybe introLabel too?)
  		JPanel centralPanel = new JPanel();
  		centralPanel.setLayout(new BoxLayout(centralPanel, BoxLayout.Y_AXIS));
  
  		// Make panel for 8 colour patches
  		JPanel patchPanel = new JPanel();
  		patchPanel.setLayout(new GridLayout());
  		_patches = new ColourPatch[8];
  
  		ColourScheme scheme = getConfig().getColourScheme();
  		ColourPatch patch = null;
  		// Loop over four columns of patches
  		for (int i=0; i<4; i++)
  		{
  			JPanel colPanel = new JPanel();
  			colPanel.setLayout(new BoxLayout(colPanel, BoxLayout.Y_AXIS));
  			// Top label and patch
  			colPanel.add(new JLabel(I18nManager.getText("dialog.setcolours." + LABEL_KEYS[i*2])));
  			patch = new ColourPatch(scheme.getColour(INDICES[i*2]));
  			patch.addMouseListener(new PatchListener(patch, _colourChooser));
  			colPanel.add(patch);
  			_patches[i*2] = patch;
  			// separator
  			colPanel.add(Box.createRigidArea(new Dimension(0, 5)));
  			// Bottom label and patch
  			colPanel.add(new JLabel(I18nManager.getText("dialog.setcolours." + LABEL_KEYS[i*2+1])));
  			patch = new ColourPatch(scheme.getColour(INDICES[i*2+1]));
  			patch.addMouseListener(new PatchListener(patch, _colourChooser));
  			colPanel.add(patch);
  			_patches[i*2+1] = patch;
  
  			// Add column to panel
  			colPanel.setBorder(BorderFactory.createEmptyBorder(2, 2, 2, 2));
  			patchPanel.add(colPanel);
  		}
  		patchPanel.setAlignmentX(Component.LEFT_ALIGNMENT);
  		centralPanel.add(patchPanel);
  		centralPanel.add(Box.createVerticalStrut(15));
  
  		// now the colourer selector
  		_colourerSelector = new ColourerSelectorPanel(_colourChooser);
  		_colourerSelector.setAlignmentX(Component.LEFT_ALIGNMENT);
  		centralPanel.add(_colourerSelector);
  		// add the central panel to the main one
  		mainPanel.add(centralPanel, BorderLayout.CENTER);
  
  		// Buttons at the bottom
  		JPanel buttonPanel = new JPanel();
  		buttonPanel.setLayout(new BoxLayout(buttonPanel, BoxLayout.LINE_AXIS));
  		_okButton = new JButton(I18nManager.getText("button.ok"));
  		_okButton.addActionListener(e -> updateConfigColours());
  		JButton cancelButton = new JButton(I18nManager.getText("button.cancel"));
  		cancelButton.addActionListener(e -> _dialog.dispose());
  		JButton resetButton = new JButton(I18nManager.getText("button.resettodefaults"));
  		resetButton.addActionListener(e -> resetPressed());
  		buttonPanel.add(resetButton);
  		buttonPanel.add(Box.createHorizontalGlue());
  		buttonPanel.add(_okButton);
  		buttonPanel.add(Box.createHorizontalStrut(5));
  		buttonPanel.add(cancelButton);
  		buttonPanel.setBorder(BorderFactory.createEmptyBorder(2, 2, 2, 2));
  		mainPanel.add(buttonPanel, BorderLayout.SOUTH);
  		return mainPanel;
  	}
  
  
  	/**
  	 * Reset colours to their defaults
  	 */
  	private void resetPressed()
  	{
  		for (int i=0; i<8; i++) {
  			_patches[i].setColour(ColourScheme.getDefaultColour(INDICES[i]));
  		}
  	}
  
  	/**
  	 * Show window
  	 */
  	public void begin()
  	{
  		if (_dialog == null)
  		{
  			_dialog = new JDialog(_parentFrame, getName());
  			_dialog.setLocationRelativeTo(_parentFrame);
  			_colourChooser = new ColourChooser(_dialog);
  			_dialog.getContentPane().add(makeContents());
  			_dialog.pack();
  		}
  		// Reset colours to current ones
  		ColourScheme scheme = getConfig().getColourScheme();
  		for (int i=0; i<8; i++) {
  			_patches[i].setColour(scheme.getColour(INDICES[i]));
  		}
  		PointColourer colourer = getConfig().getPointColourer();
  		_colourerSelector.init(colourer, scheme.getColour(ColourScheme.IDX_POINT));
  		_dialog.setVisible(true);
  		_okButton.requestFocus();
  	}
  
  	/**
  	 * Update the current colour scheme with the selected colours
  	 */
  	private void updateConfigColours()
  	{
  		ColourScheme scheme = getConfig().getColourScheme();
  		for (int i=0; i<_patches.length; i++) {
  			scheme.setColour(INDICES[i], _patches[i].getBackground());
  		}
  		getConfig().updateColourScheme();
  		PointColourer colourer = _colourerSelector.getSelectedColourer();
  		getConfig().updatePointColourer(colourer);
  		_app.updatePointColourer();
  		UpdateMessageBroker.informSubscribers();
  		_dialog.dispose();
  	}
  }
  