+++ /dev/null
-package tim.prune.gui.map;
-
-import java.awt.Color;
-import java.awt.Dimension;
-import java.awt.Graphics;
-import javax.swing.JPanel;
-
-import tim.prune.I18nManager;
-import tim.prune.config.ColourScheme;
-import tim.prune.config.Config;
-import tim.prune.data.Unit;
-
-/**
- * Class to show a scale bar on the main map of GpsPrune
- */
-public class ScaleBar extends JPanel
-{
- /** zoom level */
- private int _zoomLevel = -1;
- /** y position */
- private double _yPos = 0.0;
-
- // Dimensions
- /** Offset from left side in pixels */
- private static final int LEFT_OFFSET = 20;
- /** Offset from top in pixels */
- private static final int Y_OFFSET = 10;
- /** Tick height in pixels */
- private static final int TICK_HEIGHT = 5;
- /** Margin between bar and end text in pixels */
- private static final int MARGIN_WIDTH = 8;
-
- /** scales for each zoom level */
- private static final int[] _scales = {10000, 5000, 2000, 2000, 1000, 500, 200, 100,
- 50, 20, 10, 5, 2, 2, 1,
- -2, -5, -10, -20, -50, -100, -200};
- /** pixel counts for each zoom level (metric) */
- private static final double[] _metricPixels = {64, 64, 51, 102, 102, 102, 81, 81,
- 81, 65, 65, 65, 52, 105, 105,
- 105, 83, 83, 83, 67, 67, 67};
-
-
- /**
- * Constructor
- */
- public ScaleBar()
- {
- super();
- setOpaque(false);
- setPreferredSize(new Dimension(100, 20));
- }
-
- /**
- * Paint method to override display
- * @param inG graphics object
- */
- public void paint(Graphics inG)
- {
- super.paint(inG);
- if (_zoomLevel > -1)
- {
- try {
- final double distScaleFactor = Config.getUnitSet().getDistanceUnit().getMultFactorFromStd();
- double drightSide = LEFT_OFFSET + _metricPixels[_zoomLevel] / 1000.0 / distScaleFactor;
- int scale = _scales[_zoomLevel];
-
- // work out cos(latitude) from y position, and apply to scale
- final double angle = Math.PI * (1 - 2*_yPos);
- final double lat = Math.atan(Math.sinh(angle));
- final double cosLat = Math.cos(lat);
- int rightSide = (int) (drightSide / cosLat);
- // Adjust if scale is too large
- while (rightSide > 300)
- {
- rightSide /= 2;
- scale /= 2;
- // Abort if scale is now less than 1 unit (shouldn't ever be)
- if (scale < 1) {return;}
- }
- // Abort if scale is negative (around poles)
- if (rightSide < 1) {return;}
-
- // Determine colours to use
- Color barColour = Config.getColourScheme().getColour(ColourScheme.IDX_TEXT);
- Color blankColour = new Color(255-barColour.getRed(), 255-barColour.getGreen(), 255-barColour.getBlue());
- // Should this blank colour be set to saturation zero?
- // Draw blank bars behind
- inG.setColor(blankColour);
- inG.drawLine(LEFT_OFFSET, Y_OFFSET-1, rightSide+2, Y_OFFSET-1);
- inG.drawLine(LEFT_OFFSET, Y_OFFSET+2, rightSide+2, Y_OFFSET+2);
- inG.drawLine(LEFT_OFFSET-1, Y_OFFSET+2, LEFT_OFFSET-1, Y_OFFSET-TICK_HEIGHT);
- inG.drawLine(LEFT_OFFSET+2, Y_OFFSET+2, LEFT_OFFSET+2, Y_OFFSET-TICK_HEIGHT);
- inG.drawLine(rightSide-1, Y_OFFSET+2, rightSide-1, Y_OFFSET-TICK_HEIGHT);
- inG.drawLine(rightSide+2, Y_OFFSET+2, rightSide+2, Y_OFFSET-TICK_HEIGHT);
- // horizontal
- inG.setColor(barColour);
- inG.drawLine(LEFT_OFFSET, Y_OFFSET, rightSide, Y_OFFSET);
- inG.drawLine(LEFT_OFFSET, Y_OFFSET+1, rightSide, Y_OFFSET+1);
- // 0 tick
- inG.drawLine(LEFT_OFFSET, Y_OFFSET, LEFT_OFFSET, Y_OFFSET-TICK_HEIGHT);
- inG.drawLine(LEFT_OFFSET+1, Y_OFFSET, LEFT_OFFSET+1, Y_OFFSET-TICK_HEIGHT);
- // end tick
- inG.drawLine(rightSide, Y_OFFSET+1, rightSide, Y_OFFSET-TICK_HEIGHT);
- inG.drawLine(rightSide+1, Y_OFFSET+1, rightSide+1, Y_OFFSET-TICK_HEIGHT);
- // text
- String text = getScaleText(scale, Config.getUnitSet().getDistanceUnit());
- inG.setColor(blankColour);
- inG.drawString(text, rightSide+MARGIN_WIDTH-1, Y_OFFSET);
- inG.drawString(text, rightSide+MARGIN_WIDTH+1, Y_OFFSET);
- inG.drawString(text, rightSide+MARGIN_WIDTH, Y_OFFSET-1);
- inG.drawString(text, rightSide+MARGIN_WIDTH, Y_OFFSET+1);
- inG.setColor(barColour);
- inG.drawString(text, rightSide+MARGIN_WIDTH, Y_OFFSET);
- }
- catch (ArrayIndexOutOfBoundsException ai) {}
- }
- }
-
- /**
- * Get the scale text for the given scale
- * @param inScale scale number
- * @param inDistUnit distance unit
- * @return scale text as string
- */
- private static String getScaleText(int inScale, Unit inDistUnit)
- {
- if (inScale > 0) {
- // Positive scale means km or miles
- return "" + inScale + " " +
- I18nManager.getText(inDistUnit.getShortnameKey());
- }
- // negative scale means a fraction
- return "" + (-1.0 / inScale) + " " + I18nManager.getText(inDistUnit.getShortnameKey());
- // might be nice to say 100m instead of 0.1km, 275ft instead of 0.2miles, etc - need to be done by Unit itself?
- }
-
- /**
- * Update the scale level
- * @param inZoom new zoom level
- * @param inYPos y position, where 0 is north pole, 1 is south pole
- */
- public void updateScale(int inZoom, double inYPos)
- {
- _zoomLevel = inZoom;
- _yPos = inYPos;
- }
-}
projects / GpsPrune.git / blobdiff