grapher.java

httptunnel.jar httptunnel java 源码

		}
		
		// Draw Y axis value grid and labels
		valueFormat.setScaling( true, false );			// always scale the label values
		if ( graphDef.showGridY() )
		{
			ValueMarker[] valueList = vGrid.getValueMarkers();
			
			for (int i = 0; i < valueList.length; i++)
			{
				int valRel 		= chartGraph.getY( valueList[i].getValue() );

				valueFormat.setFormat( valueList[i].getValue(), 2, 0 );
				String label	= (valueFormat.getScaledValue() + " " + valueFormat.getPrefix()).trim();
	
				if ( majorY && valueList[i].isMajor() )
				{
					g.setColor( majColor );
					g.setStroke( dStroke );
					g.drawLine( graphOriginX, graphOriginY - valRel, graphOriginX + chartWidth, graphOriginY - valRel );
					g.setStroke( defaultStroke );
					g.drawLine( graphOriginX - 2, graphOriginY - valRel, graphOriginX + 2, graphOriginY - valRel );
					g.drawLine( graphOriginX + chartWidth - 2, graphOriginY - valRel, graphOriginX + chartWidth + 2, graphOriginY - valRel );
					graphString( g, label, graphOriginX - (label.length() * nfont_width) - 7, graphOriginY - valRel + nfont_height/2 - 1 );
				}
				else if ( minorY )
				{
					g.setColor( minColor );
					g.setStroke( dStroke );
					g.drawLine( graphOriginX, graphOriginY - valRel, graphOriginX + chartWidth, graphOriginY - valRel );
					g.setStroke( defaultStroke );
					g.drawLine( graphOriginX - 1, graphOriginY - valRel, graphOriginX + 1, graphOriginY - valRel );
					g.drawLine( graphOriginX + chartWidth - 1, graphOriginY - valRel, graphOriginX + chartWidth + 1, graphOriginY - valRel );
				}

			}
		}
		
	}
	
	/**
	 * Plots all comments and legends on graph.
	 * @param g Handle of a Graphics2D context to draw on.
	 * @throws RrdException Thrown in case of a JRobin specific error.
	 */
	private void plotComments( Graphics2D g ) throws RrdException
	{
		if ( !graphDef.showLegend() ) return;
		
		LinkedList markerList = new LinkedList();
		
		// Position the cursor just below the chart area
		int posy			= y_offset + chartHeight + CHART_UPADDING + CHART_BPADDING + ( graphDef.showMajorGridX() ? nfont_height : 0 );
		int posx			= LBORDER_SPACE;

		g.setColor( normalFontColor );
		g.setFont( normal_font );
		
		Comment[] clist		= graphDef.getComments();
		StringBuffer tmpStr	= new StringBuffer("");

		boolean newLine		= false;
		boolean drawText	= false;
		
		for (int i = 0; i < clist.length; i++)
		{
			if ( clist[i].commentType == Comment.CMT_LEGEND ) 
			{
				markerList.addLast( new LegendMarker( tmpStr.length() * nfont_width, ((Legend) clist[i]).getColor() ) );
				tmpStr.append( "   " );		// Add 3 spaces where the mark will be
			} 
			else if ( clist[i].commentType == Comment.CMT_GPRINT )
				((Gprint) clist[i]).setValue( sources, sourceIndex, valueFormat );
			
			ArrayList tknpairs = clist[i].getTokens();
			
			for (int j = 0; j < tknpairs.size(); j++)
			{
				String str 	= (String) tknpairs.get(j++);
				Byte tkn	= (Byte) tknpairs.get(j);
				
				if ( clist[i].trimString() )
					tmpStr.append( str.trim() );
				else
					tmpStr.append( str );
					
				if ( tkn != Comment.TKN_NULL )
				{
					drawText = true;
					if ( tkn == Comment.TKN_ALF ) {
						newLine	= true;
						posx	= LBORDER_SPACE;					
					} 
					else if ( tkn == Comment.TKN_ARF ) {
						newLine	= true;
						posx 	= imgWidth - RBORDER_SPACE - (tmpStr.length() * nfont_width);
					}
					else if ( tkn == Comment.TKN_ACF ) {
						newLine	= true;
						posx 	= imgWidth / 2 - (tmpStr.length() * nfont_width) / 2;
					}
					else if ( tkn == Comment.TKN_AL )
						posx	= LBORDER_SPACE;
					else if ( tkn == Comment.TKN_AR )
						posx 	= imgWidth - RBORDER_SPACE - (tmpStr.length() * nfont_width);
					else if ( tkn == Comment.TKN_AC )
						posx 	= imgWidth / 2 - (tmpStr.length() * nfont_width) / 2;
				}
				
				if ( !newLine && clist[i].addSpacer() )
					tmpStr.append( SPACER );
								
				// Plot the string
				if ( drawText ) {
					
					graphString( g, tmpStr.toString(), posx, posy );
					tmpStr		= new StringBuffer(""); 
					drawText	= false;

					// Plot the markers	
					while ( !markerList.isEmpty() ) {
						LegendMarker lm = (LegendMarker) markerList.removeFirst();
						g.setColor( lm.getColor() );
						g.fillRect( posx + lm.getXPosition(), posy - 9, 10, 10 );
						g.setColor( normalFontColor );
						g.drawRect( posx + lm.getXPosition(), posy - 9, 10, 10 );
					}
				}
				
				if ( newLine ) {
					posy 	+= nfont_height + LINE_PADDING;
					newLine	= false;
				}
				
			}
		}
		
		if ( tmpStr.length() > 0)
		{
			posx		= LBORDER_SPACE;
			graphString( g, tmpStr.toString(), posx, posy );
			tmpStr		= new StringBuffer(""); 
			drawText	= false;

			// Plot the markers	
			while ( !markerList.isEmpty() ) {
				LegendMarker lm = (LegendMarker) markerList.removeFirst();
				g.setColor( lm.getColor() );
				g.fillRect( posx + lm.getXPosition(), posy - 9, 10, 10 );
				g.setColor( normalFontColor );
				g.drawRect( posx + lm.getXPosition(), posy - 9, 10, 10 );
			}			
		}
	}
	
	/**
	 * Plots a possible overlay image over the current graph.  All white pixels
	 * are ignored and treated as 100% transparent.
	 * @param g Handle of a Graphics2D context to draw on.
	 */
	private void plotOverlay( Graphics2D g )
	{
		// If overlay drawing fails, just ignore it
		try 
		{
			File overlayImg = graphDef.getOverlay();
			if ( overlayImg != null )
			{
				BufferedImage img 	= ImageIO.read(overlayImg);
			
				int w 				= img.getWidth();
				int h 				= img.getHeight();
				int rgbWhite 		= Color.WHITE.getRGB(); 
				int pcolor, red, green, blue;

				// For better performance we might want to load all color
				// ints of the overlay in one go
				for (int i = 0; i < w; i++) {
					for (int j = 0; j < h; j++) {
						pcolor = img.getRGB(i, j);
						if ( pcolor != rgbWhite ) 
						{
							red 	= (pcolor >> 16) & 0xff;
							green 	= (pcolor >> 8) & 0xff;
							blue 	= pcolor & 0xff;

							g.setColor( new Color(red, green, blue) );
							g.drawLine( i, j, i, j );
						}
					}
				}
			}
		} catch (IOException e) {}	
	}
	
	/**
	 * Plots the graph title in the corresponding title font.
	 * @param g Handle of a Graphics2D context to draw on.
	 */
	private void plotImageTitle( Graphics2D g )
	{
		Title graphTitle	= graphDef.getTitle();
		
		// No title to draw
		if ( graphTitle == null )
			return;
		
		// Position the cursor just above the chart area
		int posy			= tfont_height - 1 + UBORDER_SPACE;
		int posx			= LBORDER_SPACE;

		// Set drawing specifics
		g.setColor( graphDef.getTitleFontColor() );
		g.setFont( title_font );

		// Parse and align the title text
		StringBuffer tmpStr	= new StringBuffer("");
		boolean newLine		= false;

		ArrayList tknpairs = graphTitle.getTokens();
		for (int j = 0; j < tknpairs.size(); j++)
		{
			String str 	= (String) tknpairs.get(j++);
			Byte tkn	= (Byte) tknpairs.get(j);

			tmpStr.append( str );
			if ( tkn != Comment.TKN_NULL )
			{
				if ( tkn == Comment.TKN_ALF ) {
					newLine	= true;
					posx	= LBORDER_SPACE;					
				} 
				else if ( tkn == Comment.TKN_ARF ) {
					newLine	= true;
					posx 	= imgWidth - RBORDER_SPACE - (tmpStr.length() * tfont_width) - tfont_width;
				}
				else if ( tkn == Comment.TKN_ACF ) {
					newLine	= true;
					posx 	= imgWidth / 2 - (tmpStr.length() * tfont_width) / 2;
				}
				else if ( tkn == Comment.TKN_AL )
					posx	= LBORDER_SPACE;
				else if ( tkn == Comment.TKN_AR )
					posx 	= imgWidth - RBORDER_SPACE - (tmpStr.length() * tfont_width) - tfont_width;
				else if ( tkn == Comment.TKN_AC )
					posx 	= imgWidth / 2 - (tmpStr.length() * tfont_width) / 2;
			}
			else {		// default is a center alignment for title
				posx 	= imgWidth / 2 - (tmpStr.length() * tfont_width) / 2;
			}

			// Plot the string
			g.drawString( tmpStr.toString(), posx, posy );
			tmpStr		= new StringBuffer(""); 

			// Go to next line
			if ( newLine )
			{
				posy += tfont_height + LINE_PADDING;
				newLine	= false;
			}
		}
		
	}
	
	/**
	 * Plots the vertical label on the left hand side of the chart area.
	 * @param g Handle of a Graphics2D context to draw on.
	 */
	private void plotVerticalLabel( Graphics2D g )
	{
		String valueAxisLabel 	= graphDef.getVerticalLabel();
		
		if ( valueAxisLabel == null )
			return;
		
		g.setColor( normalFontColor );
		int labelWidth			= valueAxisLabel.length() * nfont_width;

		// draw a rotated label text as vertical label
		g.setFont( normal_font );
		g.rotate( -Math.PI/2.0 );
		graphString( g, valueAxisLabel, - y_offset - CHART_UPADDING
										- chartHeight / 2 
										- labelWidth / 2,
										LBORDER_SPACE + nfont_height
										);
		g.rotate( Math.PI/2.0 );
	}

	/**
	 * Draws the standard JRobin signature on the image.
	 * @param g Handle of a Graphics2D context to draw on.
	 */
	private void plotSignature( Graphics2D g )
	{
		if ( !graphDef.showSignature() )
			return;
		
		String sig = "www.jrobin.org"; 
		g.setColor( Color.GRAY );
		g.setFont( new Font("Courier", Font.PLAIN, 10) );
	
		g.rotate( Math.PI/2.0 );
		g.drawString( sig, 5, - imgWidth + 9 );	
		g.rotate( -Math.PI/2.0 );
	}	

	/**
	 * Graphs a text string onto a graphics2d context, using the specified default font color.
	 * @param g Handle of a Graphics2D context to draw on.
	 * @param str String to draw.
	 * @param x X start position of the string.
	 * @param y Y start position of the string.
	 */
	private void graphString( Graphics2D g, String str, int x, int y )
	{
		Color oc = g.getColor();
		
		g.setColor( normalFontColor );
		g.drawString( str, x, y );
		
		g.setColor( oc );
	}	
}