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25 package org.jrobin.graph;
26
27 import org.jrobin.core.Util;
28
29 import java.awt.*;
30
31 class ValueAxisMrtg implements RrdGraphConstants {
32 private ImageParameters im;
33 private ImageWorker worker;
34 private RrdGraphDef gdef;
35
36 ValueAxisMrtg(RrdGraph rrdGraph) {
37 this.im = rrdGraph.im;
38 this.gdef = rrdGraph.gdef;
39 this.worker = rrdGraph.worker;
40 im.unit = gdef.unit;
41 }
42
43 boolean draw() {
44 Font font = gdef.smallFont;
45 Paint mGridColor = gdef.colors[COLOR_MGRID];
46 Paint fontColor = gdef.colors[COLOR_FONT];
47 int labelOffset = (int) (worker.getFontAscent(font) / 2);
48
49 if (Double.isNaN((im.maxval - im.minval) / im.magfact)) {
50 return false;
51 }
52
53 int xLeft = im.xorigin;
54 int xRight = im.xorigin + im.xsize;
55 String labfmt;
56 if (im.scaledstep / im.magfact * Math.max(Math.abs(im.quadrant), Math.abs(4 - im.quadrant)) <= 1.0) {
57 labfmt = "%5.2f";
58 }
59 else {
60 labfmt = Util.sprintf("%%4.%df", 1 - ((im.scaledstep / im.magfact > 10.0 || Math.ceil(im.scaledstep / im.magfact) == im.scaledstep / im.magfact) ? 1 : 0));
61 }
62 if (im.symbol != ' ' || im.unit != null) {
63 labfmt += " ";
64 }
65 if (im.symbol != ' ') {
66 labfmt += im.symbol;
67 }
68 if (im.unit != null) {
69 labfmt += im.unit;
70 }
71 for (int i = 0; i <= 4; i++) {
72 int y = im.yorigin - im.ysize * i / 4;
73 if (y >= im.yorigin - im.ysize && y <= im.yorigin) {
74 String graph_label = Util.sprintf(labfmt, im.scaledstep / im.magfact * (i - im.quadrant));
75 int length = (int) (worker.getStringWidth(graph_label, font));
76 worker.drawString(graph_label, xLeft - length - PADDING_VLABEL, y + labelOffset, font, fontColor);
77 worker.drawLine(xLeft - 2, y, xLeft + 2, y, mGridColor, TICK_STROKE);
78 worker.drawLine(xRight - 2, y, xRight + 2, y, mGridColor, TICK_STROKE);
79 worker.drawLine(xLeft, y, xRight, y, mGridColor, GRID_STROKE);
80 }
81 }
82 return true;
83 }
84
85 }