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