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POjava swing - how to repaint all components at once so user will not notice they are filled one by one?
 

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  1. POjava swing - how to repaint all components at once so user will not notice they are filled one by one?
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    <p>I have created a Hexagon component that extends <strong>JPanel</strong>. It draws a hexagon polygon in <strong>PaintComponent()</strong>. To make it fill the polygon with a given color, I created a <strong>Highlight()</strong> method that causes the component to repaint:</p> <pre><code>public class Hexagon{ private Color highlightColor; private boolean highlighted; private Polygon polygon; public Hexagon(int width ... etc){ // code to create the hexagon polygon to be drawn } @Override protected void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2d = (Graphics2D)g; g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2d.drawPolygon(polygon); // highlighting if(highlighted){ g2d.setColor(highlightColor); g2d.fillPolygon(polygon); } } public void highlight(Color highlightColor){ highlight(highlightColor, false); } public void highlight(Color highlightColor, boolean dontRepaint){ highlighted = true; this.highlightColor = highlightColor; if(dontRepaint) { return; } repaint(); } } </code></pre> <p>Now, the problem occurs when I want to highlight (fill) many hexagons at once. To highlight them I will use a for loop and call Hexagon.highlight(Color.orange). However, It will be obvious for the user that one hexagon is being filled at a time. Here is a sample image of how the filling takes place</p> <p><img src="https://i.stack.imgur.com/k78s7.jpg" alt="Hexagons before being filled with color"> <img src="https://i.stack.imgur.com/3pIOj.jpg" alt="Hexagons during filling"> <img src="https://i.stack.imgur.com/z26Sd.jpg" alt="Hexagons after being filled"></p> <p>I tried another way of repaint by letting the containing JPanel that contains the Hexagons to repaint it self. Example:</p> <pre><code> // this code is inside the containing Jpanel that hosts all the hexagons public void highlightManyHexagons(List&lt;Hexagon&gt; hexes){ for(Hexagon h : hexes){ // use overload that prevents the hexagon to do a repaint h.highlight(Color.orange, true); } // repaint the whole panel repaint(); } </code></pre> <p>This didn't work. Any idea how to make all the hexagons to be filled at once? Thanks.</p>
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    1. USSaleh Al-Abbas
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      1. VTUpMod
    1. COFor better help sooner, post an [SSCCE](http://sscce.org/).
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      1. USAndrew Thompson
 

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