tim/prune/load/babel/SimplifyFilter.java

   1 package tim.prune.load.babel;
   2
   3 import java.awt.BorderLayout;
   4 import java.awt.Component;
   5 import java.awt.GridLayout;
   6
   7 import javax.swing.Box;
   8 import javax.swing.BoxLayout;
   9 import javax.swing.ButtonGroup;
  10 import javax.swing.JComboBox;
  11 import javax.swing.JLabel;
  12 import javax.swing.JPanel;
  13 import javax.swing.JRadioButton;
  14
  15 import tim.prune.I18nManager;
  16 import tim.prune.data.UnitSetLibrary;
  17 import tim.prune.gui.DecimalNumberField;
  18 import tim.prune.gui.WholeNumberField;
  19
  20 /**
  21  * Simplify filter for GPSBabel
  22  */
  23 public class SimplifyFilter extends FilterDefinition
  24 {
  25         /** Constructor */
  26         public SimplifyFilter(AddFilterDialog inFilterDialog)
  27         {
  28                 super(inFilterDialog);
  29                 makePanelContents();
  30         }
  31
  32         private WholeNumberField _maxPointsField = null;
  33         private DecimalNumberField _distField = null;
  34         private JComboBox<String> _distUnitsCombo = null;
  35         private JRadioButton _crossTrackRadio = null;
  36         private JRadioButton _lengthRadio = null;
  37         private JRadioButton _relativeRadio = null;
  38
  39
  40         /** @return filter name */
  41         protected String getFilterName() {
  42                 return "simplify";
  43         }
  44
  45         /** Make the panel contents */
  46         protected void makePanelContents()
  47         {
  48                 setLayout(new BorderLayout());
  49                 JPanel boxPanel = new JPanel();
  50                 boxPanel.setLayout(new BoxLayout(boxPanel, BoxLayout.Y_AXIS));
  51                 add(boxPanel, BorderLayout.NORTH);
  52                 JLabel topLabel = new JLabel(I18nManager.getText("dialog.gpsbabel.filter.simplify.intro"));
  53                 topLabel.setAlignmentX(Component.LEFT_ALIGNMENT);
  54                 boxPanel.add(topLabel);
  55                 boxPanel.add(Box.createVerticalStrut(18)); // spacer
  56                 // Main three-column grid
  57                 JPanel gridPanel = new JPanel();
  58                 gridPanel.setLayout(new GridLayout(0, 3, 4, 4));
  59                 gridPanel.add(new JLabel(I18nManager.getText("dialog.gpsbabel.filter.simplify.maxpoints")));
  60                 _maxPointsField = new WholeNumberField(6);
  61                 _maxPointsField.addKeyListener(_paramChangeListener);
  62                 gridPanel.add(_maxPointsField);
  63                 gridPanel.add(new JLabel(" "));
  64                 gridPanel.add(new JLabel(I18nManager.getText("dialog.gpsbabel.filter.simplify.maxerror")));
  65                 _distField = new DecimalNumberField();
  66                 _distField.addKeyListener(_paramChangeListener);
  67                 gridPanel.add(_distField);
  68                 _distUnitsCombo = new JComboBox<String>(new String[] {
  69                         I18nManager.getText(UnitSetLibrary.UNITS_KILOMETRES.getNameKey()),
  70                         I18nManager.getText(UnitSetLibrary.UNITS_MILES.getNameKey())
  71                 });
  72                 gridPanel.add(_distUnitsCombo);
  73                 // radio buttons
  74                 _crossTrackRadio = new JRadioButton(I18nManager.getText("dialog.gpsbabel.filter.simplify.crosstrack"));
  75                 _crossTrackRadio.setSelected(true);
  76                 _lengthRadio     = new JRadioButton(I18nManager.getText("dialog.gpsbabel.filter.simplify.length"));
  77                 _relativeRadio   = new JRadioButton(I18nManager.getText("dialog.gpsbabel.filter.simplify.relative"));
  78                 ButtonGroup radioGroup = new ButtonGroup();
  79                 radioGroup.add(_crossTrackRadio);
  80                 radioGroup.add(_lengthRadio);
  81                 radioGroup.add(_relativeRadio);
  82                 gridPanel.add(_crossTrackRadio);
  83                 gridPanel.add(_lengthRadio);
  84                 gridPanel.add(_relativeRadio);
  85                 gridPanel.setAlignmentX(Component.LEFT_ALIGNMENT);
  86                 boxPanel.add(gridPanel);
  87         }
  88
  89         /**
  90          * @return true if the filters are valid
  91          */
  92         public boolean isFilterValid()
  93         {
  94                 final boolean countGiven = _maxPointsField.getText() != null && _maxPointsField.getText().trim().length() > 0;
  95                 final boolean distGiven = _distField.getText() != null && _distField.getText().trim().length() > 0;
  96                 if ((!countGiven && !distGiven) || (countGiven && distGiven)) {
  97                         return false; // only one or the other allowed
  98                 }
  99                 if (countGiven && _maxPointsField.getValue() <= 1) {
 100                         return false; // must have a decent max points
 101                 }
 102                 if (distGiven && _distField.getValue() <= 0.001) {
 103                         return false; // no zero or negative distances allowed
 104                 }
 105                 // must be ok
 106                 return true;
 107         }
 108
 109         /**
 110          * @return filter parameters as a string, or null
 111          */
 112         protected String getParameters()
 113         {
 114                 if (!isFilterValid()) return null;
 115                 StringBuilder builder = new StringBuilder();
 116                 // type
 117                 final boolean countGiven = _maxPointsField.getText() != null && _maxPointsField.getText().trim().length() > 0;
 118                 final boolean distGiven = _distField.getText() != null && _distField.getText().trim().length() > 0;
 119                 if (countGiven) {
 120                         builder.append(",count=").append(_maxPointsField.getValue());
 121                 }
 122                 else if (distGiven)
 123                 {
 124                         double dValue = 1.0;
 125                         try {
 126                                 dValue = Double.parseDouble(_distField.getText());
 127                         }
 128                         catch (Exception e) {} // shouldn't happen, otherwise validation would have failed
 129                         builder.append(",error=").append(dValue);
 130                         // units of distance (miles by default)
 131                         if (_distUnitsCombo.getSelectedIndex() == 0) {
 132                                 builder.append("k"); // nothing for miles
 133                         }
 134                 }
 135                 // three options
 136                 if (_crossTrackRadio.isSelected()) {
 137                         builder.append(",crosstrack"); // default, could not pass it
 138                 }
 139                 else if (_lengthRadio.isSelected()) {
 140                         builder.append(",length");
 141                 }
 142                 else if (_relativeRadio.isSelected()) {
 143                         builder.append(",relative");
 144                 }
 145                 return builder.toString();
 146         }
 147 }