visualizepanel.java

MacroWeka扩展了著名数据挖掘工具weka

     * @return True if it falls inside the polyline, false otherwise.
     */
    private boolean inPolyline(FastVector ob, double x, double y) {
      //this works similar to the inPoly below except that
      //the first and last lines are treated as extending infinite in one 
      //direction and 
      //then infinitly in the x dirction their is a line that will 
      //normaly be infinite but
      //can be finite in one or both directions
      
      int countx = 0;
      double vecx, vecy;
      double change;
      double x1, y1, x2, y2;
      
      for (int noa = 1; noa < ob.size() - 4; noa+= 2) {
	y1 = ((Double)ob.elementAt(noa+1)).doubleValue();
	y2 = ((Double)ob.elementAt(noa+3)).doubleValue();
	x1 = ((Double)ob.elementAt(noa)).doubleValue();
	x2 = ((Double)ob.elementAt(noa+2)).doubleValue();
	
	//System.err.println(y1 + " " + y2 + " " + x1 + " " + x2);
	vecy = y2 - y1;
	vecx = x2 - x1;
	if (noa == 1 && noa == ob.size() - 6) {
	  //then do special test first and last edge
	  if (vecy != 0) {
	    change = (y - y1) / vecy;
	    if (vecx * change + x1 >= x) {
	      //then intersection
	      countx++;
	    }
	  }
	}
	else if (noa == 1) {
	  if ((y < y2 && vecy > 0) || (y > y2 && vecy < 0)) {
	    //now just determine intersection or not
	    change = (y - y1) / vecy;
	    if (vecx * change + x1 >= x) {
	      //then intersection on horiz
	      countx++;
	    }
	  }
	}
	else if (noa == ob.size() - 6) {
	  //then do special test on last edge
	  if ((y <= y1 && vecy < 0) || (y >= y1 && vecy > 0)) {
	    change = (y - y1) / vecy;
	    if (vecx * change + x1 >= x) {
	      countx++;
	    }
	  }
	}
	else if ((y1 <= y && y < y2) || (y2 < y && y <= y1)) {
	  //then continue tests.
	  if (vecy == 0) {
	    //then lines are parallel stop tests in 
	    //ofcourse it should never make it this far
	  }
	  else {
	    change = (y - y1) / vecy;
	    if (vecx * change + x1 >= x) {
	      //then intersects on horiz
	      countx++;
	    }
	  }
	}
      }
      
      //now check for intersection with the infinity line
      y1 = ((Double)ob.elementAt(ob.size() - 2)).doubleValue();
      y2 = ((Double)ob.elementAt(ob.size() - 1)).doubleValue();
      
      if (y1 > y2) {
	//then normal line
	if (y1 >= y && y > y2) {
	  countx++;
	}
      }
      else {
	//then the line segment is inverted
	if (y1 >= y || y > y2) {
	  countx++;
	}
      }
      
      if ((countx % 2) == 1) {
	return true;
      }
      else {
	return false;
      }
    }


    /**
     * This checks to see if The coordinate passed is inside
     * the polygon that was passed.
     * @param ob The polygon.
     * @param x The x coord.
     * @param y The y coord.
     * @return True if the coordinate is in the polygon, false otherwise.
     */
    private boolean inPoly(FastVector ob, double x, double y) {
      //brief on how this works
      //it draws a line horizontally from the point to the right (infinitly)
      //it then sees how many lines of the polygon intersect this, 
      //if it is even then the point is
      // outside the polygon if it's odd then it's inside the polygon
      int count = 0;
      double vecx, vecy;
      double change;
      double x1, y1, x2, y2;
      for (int noa = 1; noa < ob.size() - 2; noa += 2) {
	y1 = ((Double)ob.elementAt(noa+1)).doubleValue();
	y2 = ((Double)ob.elementAt(noa+3)).doubleValue();
	if ((y1 <= y && y < y2) || (y2 < y && y <= y1)) {
	  //then continue tests.
	  vecy = y2 - y1;
	  if (vecy == 0) {
	    //then lines are parallel stop tests for this line
	  }
	  else {
	    x1 = ((Double)ob.elementAt(noa)).doubleValue();
	    x2 = ((Double)ob.elementAt(noa+2)).doubleValue();
	    vecx = x2 - x1;
	    change = (y - y1) / vecy;
	    if (vecx * change + x1 >= x) {
	      //then add to count as an intersected line
	      count++;
	    }
	  }
	}
      }
      if ((count % 2) == 1) {
	//then lies inside polygon
	//System.out.println("in");
	return true;
      }
      else {
	//System.out.println("out");
	return false;
      }
      //System.out.println("WHAT?!?!?!?!!?!??!?!");
      //return false;
    }

    /**
     * Set level of jitter and repaint the plot using the new jitter value
     * @param j the level of jitter
     */
    public void setJitter(int j) {
      m_plot2D.setJitter(j);
    }

    /**
     * Set the index of the attribute to go on the x axis
     * @param x the index of the attribute to use on the x axis
     */
    public void setXindex(int x) {

      // this just ensures that the shapes get disposed of 
      //if the attribs change
      if (x != m_xIndex) {
	cancelShapes();
      }
      m_xIndex = x;
      m_plot2D.setXindex(x);
      if (m_showAttBars) {
	m_attrib.setX(x);
      }
      //      this.repaint();
    }
    
    /**
     * Set the index of the attribute to go on the y axis
     * @param y the index of the attribute to use on the y axis
     */
    public void setYindex(int y) {
    
      // this just ensures that the shapes get disposed of 
      //if the attribs change
      if (y != m_yIndex) {
	cancelShapes();
      }
      m_yIndex = y;
      m_plot2D.setYindex(y);
      if (m_showAttBars) {
	m_attrib.setY(y);
      }
      //      this.repaint();
    }

    /**
     * Set the index of the attribute to use for colouring
     * @param c the index of the attribute to use for colouring
     */
    public void setCindex(int c) {
      m_cIndex = c;
      m_plot2D.setCindex(c);
      if (m_showAttBars) {
	m_attrib.setCindex(c, m_plot2D.getMaxC(), m_plot2D.getMinC());
      }
      m_classPanel.setCindex(c);
      this.repaint();
    }

    /**
     * Set the index of the attribute to use for the shape.
     * @param s the index of the attribute to use for the shape
     */
    public void setSindex(int s) {
      if (s != m_sIndex) {
	m_shapePoints = null;
	m_createShape = false;
      }
      m_sIndex = s;
      this.repaint();
    }

    /**
     * Clears all existing plots and sets a new master plot
     * @param newPlot the new master plot
     * @exception Exception if plot could not be added
     */
    public void setMasterPlot(PlotData2D newPlot) throws Exception {
      m_plot2D.removeAllPlots();
      this.addPlot(newPlot);
    }

    /**
     * Adds a plot. If there are no plots so far this plot becomes
     * the master plot and, if it has a custom colour defined then
     * the class panel is removed.
     * @param newPlot the plot to add.
     * @exception Exception if plot could not be added
     */
    public void addPlot(PlotData2D newPlot) throws Exception {
      if (m_plot2D.getPlots().size() == 0) {
	m_plot2D.addPlot(newPlot);
	if (m_plotSurround.getComponentCount() > 1 && 
	    m_plotSurround.getComponent(1) == m_attrib &&
	    m_showAttBars) {
	  try {
	    m_attrib.setInstances(newPlot.m_plotInstances);
	    m_attrib.setCindex(0);m_attrib.setX(0); m_attrib.setY(0);
	  } catch (Exception ex) {
	    // more attributes than the panel can handle?
	    // Due to hard coded constraints in GridBagLayout
	    m_plotSurround.remove(m_attrib);
	    System.err.println("Warning : data contains more attributes "
			       +"than can be displayed as attribute bars.");
	    if (m_Log != null) {
	      m_Log.logMessage("Warning : data contains more attributes "
			       +"than can be displayed as attribute bars.");
	    }
	  }
	} else if (m_showAttBars) {
	  try {
	    m_attrib.setInstances(newPlot.m_plotInstances);
	    m_attrib.setCindex(0);m_attrib.setX(0); m_attrib.setY(0);
	    GridBagConstraints constraints = new GridBagConstraints();
	    constraints.fill = constraints.BOTH;
	    constraints.insets = new Insets(0, 0, 0, 0);
	    constraints.gridx=4;constraints.gridy=0;constraints.weightx=1;
	    constraints.gridwidth=1;constraints.gridheight=1;
	    constraints.weighty=5;
	    m_plotSurround.add(m_attrib, constraints);
	  } catch (Exception ex) {
	    System.err.println("Warning : data contains more attributes "
			       +"than can be displayed as attribute bars.");
	    if (m_Log != null) {
	      m_Log.logMessage("Warning : data contains more attributes "
			       +"than can be displayed as attribute bars.");
	    }
	  }
	}
	m_classPanel.setInstances(newPlot.m_plotInstances);

	plotReset(newPlot.m_plotInstances, newPlot.getCindex());
	if (newPlot.m_useCustomColour) {
	  VisualizePanel.this.remove(m_classSurround);
	  switchToLegend();
	  m_legendPanel.setPlotList(m_plot2D.getPlots());
	  m_ColourCombo.setEnabled(false);
	}
      } else  {
	if (!newPlot.m_useCustomColour) {
	  VisualizePanel.this.add(m_classSurround, BorderLayout.SOUTH);
	  m_ColourCombo.setEnabled(true);
	}
	if (m_plot2D.getPlots().size() == 1) {
	  switchToLegend();
	}
	m_plot2D.addPlot(newPlot);
	m_legendPanel.setPlotList(m_plot2D.getPlots());
      }
    }

    /**
     * Remove the attibute panel and replace it with the legend panel
     */
    protected void switchToLegend() {

      if (m_plotSurround.getComponentCount() > 1 && 
	  m_plotSurround.getComponent(1) == m_attrib) {
	m_plotSurround.remove(m_attrib);
      }
	
      if (m_plotSurround.getComponentCount() > 1 &&
	  m_plotSurround.getComponent(1) == m_legendPanel) {
	return;
      }

      GridBagConstraints constraints = new GridBagConstraints();
      constraints.fill = constraints.BOTH;
      constraints.insets = new Insets(0, 0, 0, 0);
      constraints.gridx=4;constraints.gridy=0;constraints.weightx=1;
      constraints.gridwidth=1;constraints.gridheight=1;
      constraints.weighty=5;
      m_plotSurround.add(m_legendPanel, constraints);
      setSindex(0);
      m_ShapeCombo.setEnabled(false);
    }

    /**
     * Reset the visualize panel's buttons and the plot panels instances
     */
    private void plotReset(Instances inst, int cIndex) {
      if (m_splitListener == null) {
	m_submit.setText("Reset");
	m_submit.setActionCommand("Reset");
	//if (m_origInstances == null || m_origInstances == inst) {
	if (m_originalPlot == null || m_originalPlot.m_plotInstances == inst) {
	  m_submit.setEnabled(false);
	}
	else {
	  m_submit.setEnabled(true);
	}
      } 
      else {
	m_submit.setEnabled(false);
      }

      m_plotInstances = inst;
      if (m_splitListener != null) {
	m_plotInstances.randomize(new Random());
      }
      m_xIndex=0;
      m_yIndex=0;
      m_cIndex=cIndex;
      cancelShapes();
    }

    /**
     * Set a list of colours to use for plotting points
     * @param cols a list of java.awt.Colors
     */
    public void setColours(FastVector cols) {
      m_plot2D.setColours(cols);
      m_colorList = cols;
    }
    
    /**
     * This will draw the shapes created onto the panel.
     * For best visual, this should be the first thing to be drawn
     * (and it currently is).
     * @param gx The graphics context.
     */
    private void drawShapes(Graphics gx) {
      //FastVector tmp = m_plot.getShapes();
      
      if (m_shapes != null) {
	FastVector stmp;
	int x1, y1, x2, y2;
	for (int noa = 0; noa < m_shapes.size(); noa++) {
	  stmp = (FastVector)m_shapes.elementAt(noa);
	  if (((Double)stmp.elementAt(0)).intValue() == 1) {
	    //then rectangle
	    x1 = (int)m_plot2D.convertToPanelX(((Double)stmp.elementAt(1)).
				      doubleValue());
	    y1 = (int)m_plot2D.convertToPanelY(((Double)stmp.elementAt(2)).
				      doubleValue());
	    x2 = (int)m_plot2D.convertToPanelX(((Double)stmp.elementAt(3)).
				      doubleValue());
	    y2 = (int)m_plot2D.convertToPanelY(((Double)stmp.elementAt(4)).
				      doubleValue());
	    
	    gx.setColor(Color.gray);
	    gx.fillRect(x1, y1, x2 - x1, y2 - y1);
	    gx.setColor(Color.black);
	    gx.drawRect(x1, y1, x2 - x1, y2 - y1);
	    
	  }
	  else if (((Double)stmp.elementAt(0)).intValue() == 2) {
	    //then polygon
	    int[] ar1, ar2;
	    ar1 = getXCoords(stmp);
	    ar2 = getYCoords(stmp);
	    gx.setColor(Color.gray);
	    gx.fillPolygon(ar1, ar2, (stmp.size() - 1) / 2); 
	    gx.setColor(Color.black);
	    gx.drawPolyline(ar1, ar2, (stmp.size() - 1) / 2);
	  }
	  else if (((Double)stmp.elementAt(0)).intValue() == 3) {
	    //then polyline
	    int[] ar1, ar2;
	    FastVector tmp = makePolygon(stmp);
	    ar1 = getXCoords(tmp);
	    ar2 = getYCoords(tmp);