001 package com.croftsoft.core.animation.animator;
002
003 import java.awt.*;
004 import java.awt.geom.*;
005 import javax.swing.JComponent;
006
007 import com.croftsoft.core.animation.ComponentAnimator;
008 import com.croftsoft.core.awt.font.FontLib;
009 import com.croftsoft.core.lang.NullArgumentException;
010 import com.croftsoft.core.math.MathConstants;
011
012 /*********************************************************************
013 * Samples and displays the frame rate.
014 *
015 * @version
016 * 2003-07-07
017 * @since
018 * 2003-02-07
019 * @author
020 * <a href="https://www.croftsoft.com/">David Wallace Croft</a>
021 *********************************************************************/
022
023 public final class FrameRateAnimator
024 implements ComponentAnimator
025 //////////////////////////////////////////////////////////////////////
026 //////////////////////////////////////////////////////////////////////
027 {
028
029 private static final long SAMPLE_PERIOD_IN_MILLIS
030 = 10 * MathConstants.MILLISECONDS_PER_SECOND;
031
032 private static final int MAX_FRAME_RATE = 99999;
033
034 //
035
036 private final Color color;
037
038 private final Font font;
039
040 private final Rectangle repaintBounds;
041
042 private final float x;
043
044 private final float y;
045
046 //
047
048 private boolean disabled;
049
050 private boolean oldDisabled;
051
052 private long frameCount;
053
054 private long lastUpdateTime;
055
056 private double frameRate;
057
058 private String frameRateString;
059
060 //////////////////////////////////////////////////////////////////////
061 //////////////////////////////////////////////////////////////////////
062
063 public FrameRateAnimator (
064 Color color,
065 Font font,
066 Rectangle2D textLayoutBounds )
067 //////////////////////////////////////////////////////////////////////
068 {
069 NullArgumentException.check ( this.color = color );
070
071 NullArgumentException.check ( this.font = font );
072
073 NullArgumentException.check ( textLayoutBounds );
074
075 x = ( float ) textLayoutBounds.getX ( );
076
077 y = ( float ) -textLayoutBounds.getY ( );
078
079 repaintBounds = textLayoutBounds.getBounds ( );
080
081 repaintBounds.y = 0;
082
083 frameRateString = "?????";
084 }
085
086 public FrameRateAnimator (
087 Component component,
088 Color color )
089 //////////////////////////////////////////////////////////////////////
090 {
091 this (
092 color,
093 component.getFont ( ),
094 FontLib.getTextLayoutBounds (
095 component, Integer.toString ( MAX_FRAME_RATE ) ) );
096 }
097
098 public FrameRateAnimator ( Component component )
099 //////////////////////////////////////////////////////////////////////
100 {
101 this ( component, component.getForeground ( ) );
102 }
103
104 //////////////////////////////////////////////////////////////////////
105 //////////////////////////////////////////////////////////////////////
106
107 public void update ( JComponent component )
108 //////////////////////////////////////////////////////////////////////
109 {
110 if ( oldDisabled != disabled )
111 {
112 component.repaint ( );
113
114 oldDisabled = disabled;
115 }
116
117 if ( disabled )
118 {
119 return;
120 }
121
122 long updateTime = System.currentTimeMillis ( );
123
124 frameCount++;
125
126 long timeDelta = updateTime - lastUpdateTime;
127
128 if ( timeDelta < SAMPLE_PERIOD_IN_MILLIS )
129 {
130 return;
131 }
132
133 frameRate = frameCount * MathConstants.MILLISECONDS_PER_SECOND
134 / ( double ) timeDelta;
135
136 if ( frameRate > MAX_FRAME_RATE )
137 {
138 frameRateString = ">>>>>";
139 }
140 else
141 {
142 frameRateString = Long.toString ( Math.round ( frameRate ) );
143 }
144
145 frameCount = 0;
146
147 lastUpdateTime = updateTime;
148
149 component.repaint ( repaintBounds );
150 }
151
152 public void paint (
153 JComponent component,
154 Graphics2D graphics )
155 //////////////////////////////////////////////////////////////////////
156 {
157 if ( disabled )
158 {
159 return;
160 }
161
162 graphics.setColor ( color );
163
164 graphics.setFont ( font );
165
166 graphics.drawString ( frameRateString, x, y );
167 }
168
169 //////////////////////////////////////////////////////////////////////
170 //////////////////////////////////////////////////////////////////////
171
172 public double getFrameRate ( )
173 //////////////////////////////////////////////////////////////////////
174 {
175 return frameRate;
176 }
177
178 public void toggle ( )
179 //////////////////////////////////////////////////////////////////////
180 {
181 disabled = !disabled;
182 }
183
184 //////////////////////////////////////////////////////////////////////
185 //////////////////////////////////////////////////////////////////////
186 }