dynamictimeseriescollection.valuesequence.html

jfreechart1。0。2的api。

<FONT color="green">586</FONT>            }  /*** If data can be &lt; 0, add code here to check the minimum    **/<a name="line.586"></a>
<FONT color="green">587</FONT>            if (extremaChanged) {<a name="line.587"></a>
<FONT color="green">588</FONT>                invalidateRangeInfo();<a name="line.588"></a>
<FONT color="green">589</FONT>            }<a name="line.589"></a>
<FONT color="green">590</FONT>            //  wipe the next (about to be used) set of data slots<a name="line.590"></a>
<FONT color="green">591</FONT>            float wiper = (float) 0.0;<a name="line.591"></a>
<FONT color="green">592</FONT>            for (int s = 0; s &lt; getSeriesCount(); s++) {<a name="line.592"></a>
<FONT color="green">593</FONT>                this.valueHistory[s].enterData(this.newestAt, wiper);<a name="line.593"></a>
<FONT color="green">594</FONT>            }<a name="line.594"></a>
<FONT color="green">595</FONT>            // Update the array of TimePeriods:<a name="line.595"></a>
<FONT color="green">596</FONT>            this.pointsInTime[this.newestAt] = nextInstant;<a name="line.596"></a>
<FONT color="green">597</FONT>            // Now advance "oldestAt", wrapping at end of the array<a name="line.597"></a>
<FONT color="green">598</FONT>            this.oldestAt++;<a name="line.598"></a>
<FONT color="green">599</FONT>            if (this.oldestAt &gt;= this.historyCount) {<a name="line.599"></a>
<FONT color="green">600</FONT>                this.oldestAt = 0;<a name="line.600"></a>
<FONT color="green">601</FONT>            }<a name="line.601"></a>
<FONT color="green">602</FONT>            // Update the domain limits:<a name="line.602"></a>
<FONT color="green">603</FONT>            long startL = this.domainStart.longValue();  //(time is kept in msec)<a name="line.603"></a>
<FONT color="green">604</FONT>            this.domainStart = new Long(startL + this.deltaTime);<a name="line.604"></a>
<FONT color="green">605</FONT>            long endL = this.domainEnd.longValue();<a name="line.605"></a>
<FONT color="green">606</FONT>            this.domainEnd = new Long(endL + this.deltaTime);<a name="line.606"></a>
<FONT color="green">607</FONT>            this.domainRange = new Range(startL, endL);<a name="line.607"></a>
<FONT color="green">608</FONT>            fireSeriesChanged();<a name="line.608"></a>
<FONT color="green">609</FONT>            return nextInstant;<a name="line.609"></a>
<FONT color="green">610</FONT>        }<a name="line.610"></a>
<FONT color="green">611</FONT>    <a name="line.611"></a>
<FONT color="green">612</FONT>        //  If data can be &lt; 0, the next 2 methods should be modified<a name="line.612"></a>
<FONT color="green">613</FONT>    <a name="line.613"></a>
<FONT color="green">614</FONT>        /**<a name="line.614"></a>
<FONT color="green">615</FONT>         * Invalidates the range info.<a name="line.615"></a>
<FONT color="green">616</FONT>         */<a name="line.616"></a>
<FONT color="green">617</FONT>        public void invalidateRangeInfo() {<a name="line.617"></a>
<FONT color="green">618</FONT>            this.maxValue = null;<a name="line.618"></a>
<FONT color="green">619</FONT>            this.valueRange = null;<a name="line.619"></a>
<FONT color="green">620</FONT>        }<a name="line.620"></a>
<FONT color="green">621</FONT>    <a name="line.621"></a>
<FONT color="green">622</FONT>        /**<a name="line.622"></a>
<FONT color="green">623</FONT>         * Returns the maximum value.<a name="line.623"></a>
<FONT color="green">624</FONT>         *<a name="line.624"></a>
<FONT color="green">625</FONT>         * @return The maximum value.<a name="line.625"></a>
<FONT color="green">626</FONT>         */<a name="line.626"></a>
<FONT color="green">627</FONT>        protected double findMaxValue() {<a name="line.627"></a>
<FONT color="green">628</FONT>            double max = 0.0f;<a name="line.628"></a>
<FONT color="green">629</FONT>            for (int s = 0; s &lt; getSeriesCount(); s++) {<a name="line.629"></a>
<FONT color="green">630</FONT>                for (int i = 0; i &lt; this.historyCount; i++) {<a name="line.630"></a>
<FONT color="green">631</FONT>                    double tmp = getYValue(s, i);<a name="line.631"></a>
<FONT color="green">632</FONT>                    if (tmp &gt; max) {<a name="line.632"></a>
<FONT color="green">633</FONT>                        max = tmp;<a name="line.633"></a>
<FONT color="green">634</FONT>                    }<a name="line.634"></a>
<FONT color="green">635</FONT>                }<a name="line.635"></a>
<FONT color="green">636</FONT>            }<a name="line.636"></a>
<FONT color="green">637</FONT>            return max;<a name="line.637"></a>
<FONT color="green">638</FONT>        }<a name="line.638"></a>
<FONT color="green">639</FONT>    <a name="line.639"></a>
<FONT color="green">640</FONT>        /** End, positive-data-only code  **/<a name="line.640"></a>
<FONT color="green">641</FONT>    <a name="line.641"></a>
<FONT color="green">642</FONT>        /**<a name="line.642"></a>
<FONT color="green">643</FONT>         * Returns the index of the oldest data item.<a name="line.643"></a>
<FONT color="green">644</FONT>         *<a name="line.644"></a>
<FONT color="green">645</FONT>         * @return The index.<a name="line.645"></a>
<FONT color="green">646</FONT>         */<a name="line.646"></a>
<FONT color="green">647</FONT>        public int getOldestIndex() {<a name="line.647"></a>
<FONT color="green">648</FONT>            return this.oldestAt;<a name="line.648"></a>
<FONT color="green">649</FONT>        }<a name="line.649"></a>
<FONT color="green">650</FONT>    <a name="line.650"></a>
<FONT color="green">651</FONT>        /**<a name="line.651"></a>
<FONT color="green">652</FONT>         * Returns the index of the newest data item.<a name="line.652"></a>
<FONT color="green">653</FONT>         *<a name="line.653"></a>
<FONT color="green">654</FONT>         * @return The index.<a name="line.654"></a>
<FONT color="green">655</FONT>         */<a name="line.655"></a>
<FONT color="green">656</FONT>        public int getNewestIndex() {<a name="line.656"></a>
<FONT color="green">657</FONT>            return this.newestAt;<a name="line.657"></a>
<FONT color="green">658</FONT>        }<a name="line.658"></a>
<FONT color="green">659</FONT>    <a name="line.659"></a>
<FONT color="green">660</FONT>        // appendData() writes new data at the index position given by newestAt/<a name="line.660"></a>
<FONT color="green">661</FONT>        // When adding new data dynamically, use advanceTime(), followed by this:<a name="line.661"></a>
<FONT color="green">662</FONT>        /**<a name="line.662"></a>
<FONT color="green">663</FONT>         * Appends new data.<a name="line.663"></a>
<FONT color="green">664</FONT>         *<a name="line.664"></a>
<FONT color="green">665</FONT>         * @param newData  the data.<a name="line.665"></a>
<FONT color="green">666</FONT>         */<a name="line.666"></a>
<FONT color="green">667</FONT>        public void appendData(float[] newData) {<a name="line.667"></a>
<FONT color="green">668</FONT>            int nDataPoints = newData.length;<a name="line.668"></a>
<FONT color="green">669</FONT>            if (nDataPoints &gt; this.valueHistory.length) {<a name="line.669"></a>
<FONT color="green">670</FONT>                throw new IllegalArgumentException(<a name="line.670"></a>
<FONT color="green">671</FONT>                   "More data than series to put them in"<a name="line.671"></a>
<FONT color="green">672</FONT>                );<a name="line.672"></a>
<FONT color="green">673</FONT>            }<a name="line.673"></a>
<FONT color="green">674</FONT>            int s;   // index to select the "series"<a name="line.674"></a>
<FONT color="green">675</FONT>            for (s = 0; s &lt; nDataPoints; s++) {<a name="line.675"></a>
<FONT color="green">676</FONT>                // check whether the "valueHistory" array member exists; if not, <a name="line.676"></a>
<FONT color="green">677</FONT>                // create them:<a name="line.677"></a>
<FONT color="green">678</FONT>                if (this.valueHistory[s] == null) {<a name="line.678"></a>
<FONT color="green">679</FONT>                    this.valueHistory[s] = new ValueSequence(this.historyCount);<a name="line.679"></a>
<FONT color="green">680</FONT>                }<a name="line.680"></a>
<FONT color="green">681</FONT>                this.valueHistory[s].enterData(this.newestAt, newData[s]);<a name="line.681"></a>
<FONT color="green">682</FONT>            }<a name="line.682"></a>
<FONT color="green">683</FONT>            fireSeriesChanged();<a name="line.683"></a>
<FONT color="green">684</FONT>        }<a name="line.684"></a>
<FONT color="green">685</FONT>    <a name="line.685"></a>
<FONT color="green">686</FONT>        /**<a name="line.686"></a>
<FONT color="green">687</FONT>         * Appends data at specified index, for loading up with data from file(s).<a name="line.687"></a>
<FONT color="green">688</FONT>         *<a name="line.688"></a>
<FONT color="green">689</FONT>         * @param  newData  the data<a name="line.689"></a>
<FONT color="green">690</FONT>         * @param  insertionIndex  the index value at which to put it<a name="line.690"></a>
<FONT color="green">691</FONT>         * @param  refresh  value of n in "refresh the display on every nth call"<a name="line.691"></a>
<FONT color="green">692</FONT>         *                 (ignored if &lt;= 0 )<a name="line.692"></a>
<FONT color="green">693</FONT>         */<a name="line.693"></a>
<FONT color="green">694</FONT>         public void appendData(float[] newData, int insertionIndex, int refresh) {<a name="line.694"></a>
<FONT color="green">695</FONT>             int nDataPoints = newData.length;<a name="line.695"></a>
<FONT color="green">696</FONT>             if (nDataPoints &gt; this.valueHistory.length) {<a name="line.696"></a>
<FONT color="green">697</FONT>                 throw new IllegalArgumentException(<a name="line.697"></a>
<FONT color="green">698</FONT>                     "More data than series to put them " + "in"<a name="line.698"></a>
<FONT color="green">699</FONT>                 );<a name="line.699"></a>
<FONT color="green">700</FONT>             }<a name="line.700"></a>
<FONT color="green">701</FONT>             for (int s = 0; s &lt; nDataPoints; s++) {<a name="line.701"></a>
<FONT color="green">702</FONT>                 if (this.valueHistory[s] == null) {<a name="line.702"></a>
<FONT color="green">703</FONT>                    this.valueHistory[s] = new ValueSequence(this.historyCount);<a name="line.703"></a>
<FONT color="green">704</FONT>                 }<a name="line.704"></a>
<FONT color="green">705</FONT>                 this.valueHistory[s].enterData(insertionIndex, newData[s]);<a name="line.705"></a>
<FONT color="green">706</FONT>             }<a name="line.706"></a>
<FONT color="green">707</FONT>             if (refresh &gt; 0) {<a name="line.707"></a>
<FONT color="green">708</FONT>                 insertionIndex++;<a name="line.708"></a>
<FONT color="green">709</FONT>                 if (insertionIndex % refresh == 0) {<a name="line.709"></a>
<FONT color="green">710</FONT>                     fireSeriesChanged();<a name="line.710"></a>
<FONT color="green">711</FONT>                 }<a name="line.711"></a>
<FONT color="green">712</FONT>             }<a name="line.712"></a>
<FONT color="green">713</FONT>        }<a name="line.713"></a>
<FONT color="green">714</FONT>    <a name="line.714"></a>
<FONT color="green">715</FONT>        /**<a name="line.715"></a>
<FONT color="green">716</FONT>         * Returns the newest time.<a name="line.716"></a>
<FONT color="green">717</FONT>         *<a name="line.717"></a>
<FONT color="green">718</FONT>         * @return The newest time.<a name="line.718"></a>
<FONT color="green">719</FONT>         */<a name="line.719"></a>
<FONT color="green">720</FONT>        public RegularTimePeriod getNewestTime() {<a name="line.720"></a>
<FONT color="green">721</FONT>            return this.pointsInTime[this.newestAt];<a name="line.721"></a>
<FONT color="green">722</FONT>        }<a name="line.722"></a>
<FONT color="green">723</FONT>    <a name="line.723"></a>
<FONT color="green">724</FONT>        /**<a name="line.724"></a>
<FONT color="green">725</FONT>         * Returns the oldest time.<a name="line.725"></a>
<FONT color="green">726</FONT>         *<a name="line.726"></a>
<FONT color="green">727</FONT>         * @return The oldest time.<a name="line.727"></a>
<FONT color="green">728</FONT>         */<a name="line.728"></a>
<FONT color="green">729</FONT>        public RegularTimePeriod getOldestTime() {<a name="line.729"></a>
<FONT color="green">730</F