git.gag.com Git - debian/openrocket/blob - core/src/net/sf/openrocket/gui/scalefigure/AbstractScaleFigure.java

   1 package net.sf.openrocket.gui.scalefigure;
   2
   3 import java.awt.Color;
   4 import java.awt.Dimension;
   5 import java.util.EventListener;
   6 import java.util.EventObject;
   7 import java.util.LinkedList;
   8 import java.util.List;
   9
  10 import javax.swing.JPanel;
  11
  12 import net.sf.openrocket.gui.util.GUIUtil;
  13 import net.sf.openrocket.util.StateChangeListener;
  14
  15
  16 public abstract class AbstractScaleFigure extends JPanel implements ScaleFigure {
  17
  18         // Number of pixels to leave at edges when fitting figure
  19         private static final int DEFAULT_BORDER_PIXELS_WIDTH = 30;
  20         private static final int DEFAULT_BORDER_PIXELS_HEIGHT = 20;
  21
  22
  23         protected final double dpi;
  24
  25         protected double scale = 1.0;
  26         protected double scaling = 1.0;
  27
  28         protected int borderPixelsWidth = DEFAULT_BORDER_PIXELS_WIDTH;
  29         protected int borderPixelsHeight = DEFAULT_BORDER_PIXELS_HEIGHT;
  30
  31         protected final List<EventListener> listeners = new LinkedList<EventListener>();
  32
  33
  34         public AbstractScaleFigure() {
  35                 this.dpi = GUIUtil.getDPI();
  36                 this.scaling = 1.0;
  37                 this.scale = dpi / 0.0254 * scaling;
  38
  39                 setBackground(Color.WHITE);
  40                 setOpaque(true);
  41         }
  42
  43
  44
  45         public abstract void updateFigure();
  46
  47         public abstract double getFigureWidth();
  48
  49         public abstract double getFigureHeight();
  50
  51
  52         @Override
  53         public double getScaling() {
  54                 return scaling;
  55         }
  56
  57         @Override
  58         public double getAbsoluteScale() {
  59                 return scale;
  60         }
  61
  62         @Override
  63         public void setScaling(double scaling) {
  64                 if (Double.isInfinite(scaling) || Double.isNaN(scaling))
  65                         scaling = 1.0;
  66                 if (scaling < 0.001)
  67                         scaling = 0.001;
  68                 if (scaling > 1000)
  69                         scaling = 1000;
  70                 if (Math.abs(this.scaling - scaling) < 0.01)
  71                         return;
  72                 this.scaling = scaling;
  73                 this.scale = dpi / 0.0254 * scaling;
  74                 updateFigure();
  75         }
  76
  77         @Override
  78         public void setScaling(Dimension bounds) {
  79                 double zh = 1, zv = 1;
  80                 int w = bounds.width - 2 * borderPixelsWidth - 20;
  81                 int h = bounds.height - 2 * borderPixelsHeight - 20;
  82
  83                 if (w < 10)
  84                         w = 10;
  85                 if (h < 10)
  86                         h = 10;
  87
  88                 zh = (w) / getFigureWidth();
  89                 zv = (h) / getFigureHeight();
  90
  91                 double s = Math.min(zh, zv) / dpi * 0.0254 - 0.001;
  92
  93                 setScaling(s);
  94         }
  95
  96
  97         @Override
  98         public Dimension getBorderPixels() {
  99                 return new Dimension(borderPixelsWidth, borderPixelsHeight);
 100         }
 101
 102         @Override
 103         public void setBorderPixels(int width, int height) {
 104                 this.borderPixelsWidth = width;
 105                 this.borderPixelsHeight = height;
 106         }
 107
 108
 109         @Override
 110         public void addChangeListener(EventListener listener) {
 111                 listeners.add(0, listener);
 112         }
 113
 114         @Override
 115         public void removeChangeListener(EventListener listener) {
 116                 listeners.remove(listener);
 117         }
 118
 119         private EventObject changeEvent = null;
 120
 121         protected void fireChangeEvent() {
 122                 if (changeEvent == null)
 123                         changeEvent = new EventObject(this);
 124                 // Copy the list before iterating to prevent concurrent modification exceptions.
 125                 EventListener[] list = listeners.toArray(new EventListener[0]);
 126                 for (EventListener l : list) {
 127                         if ( l instanceof StateChangeListener ) {
 128                                 ((StateChangeListener)l).stateChanged(changeEvent);
 129                         }
 130                 }
 131         }
 132
 133 }