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POhow to draw diamond using tapestry component t:loop
 

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  1. POhow to draw diamond using tapestry component t:loop
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    <p>For my homework for Tapestry, I have to show a diamond on table from array of strings. Here's what I have so far:</p> <p>code Index.java</p> <pre><code> public class Index { @Property private Integer number; @Property private String [] table; public Index() { number = 9; int temp = 0; String tmp = "-"; table = new String[number * number]; if(singleCell == null) singleCell=""; for (int i = 0; i &lt; number; i++) { for (int j = 0; j &lt; number; j++) { table[temp] = tmp; temp++; } } } @OnEvent(component="diamond") Object onDiamondLink() { String swapValue = "*"; int sum = number / 2 ; int x1 = number-1; int sumY = number / 2; int y1 = number+1; int temp = x1 + sumY; for (int i = 0; i &lt; table.length; i++) { table[i] = "-"; } for (int i = 0; i &lt; table.length; i++) { if( i == sum) { table[i] = swapValue; sum = sum + x1; } if ( i == sumY ) { table[i] = swapValue; sumY = sumY + y1; } } System.out.println("link diamond is activate"); return null; } public boolean isStartRow(){ return (myIndex%9 ==0); } public boolean isEndRow(){ return (myIndex%9 == 8); } public String getStartTR(){ return "&lt;tr &gt;"; } public String getEndTR(){ return "&lt;/tr&gt;"; } </code></pre> <p>code of index.tml:</p> <pre><code>&lt;t:actionlink t:id="diamond" &gt;Diamond table&lt;/t:actionlink&gt; &lt;br/&gt; &lt;h1&gt;Result:&lt;/h1&gt; &lt;table border="1" &gt; &lt;t:loop t:source="table" t:value="singleCell" index="MyIndex"&gt; &lt;t:if test="startRow"&gt; &lt;t:outputraw value="startTR"/&gt; &lt;/t:if&gt; &lt;td width="20px"&gt; ${singleCell} &lt;/td&gt; &lt;t:if test="endRow"&gt; &lt;t:outputraw value="endTR"/&gt; &lt;/t:if&gt; &lt;/t:loop&gt; &lt;/table&gt; </code></pre> <p>This code generates this output:</p> <pre><code>- - - - * - - - - - - - * - * - - - - - * - - - * - - - * - - - - - * - * - - - - - - - * - - - - - - - * - * - - - - - * - - - * - - - * - - - - - * - * - - - - </code></pre> <p>The correct output I need is this:</p> <pre><code>- - - - * - - - - - - - * - * - - - - - * - - - * - - - * - - - - - * - * - - - - - - - * - * - - - - - * - - - * - - - * - - - - - * - * - - - - - - - * - - - - </code></pre> <p>Any ideas will be great help.</p>
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    1. PO
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    1. This table or related slice is empty.
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    1. USBill the Lizard
    1. USdusmanka
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
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      1. POhow to draw diamond using tapestry component t:loop
      1. This table or related slice is empty.
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      1. VTUpMod
    1. COYou've almost nailed it, The only thing that you've missed is the RowCount - ColCount == number /2 part, refer my answer below. It should be clear to you there.
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      1. USnikhil
    2. COI'm rather disappointed in the two answers. Not because of the content, but because of the principle.. the question clearly says "this is for my homework" and you guys just gave the code without any kind of explanation. People aren't going to learn by copy/pasting your code.
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      1. USCoeffect
    3. CO@Mannimarco I made an update, he can try ussing the outputraw component to try to display as html. Fore info can be found in google or at tapestry.org
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