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POusing repaint() method with actionPerformed
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  1. POusing repaint() method with actionPerformed
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    copied!<p>How to use the repaint() method when a button is pressed and Graphics p has to re-paint everything from scratch?</p> <p>Thanks.</p> <pre><code> import javax.swing.Box; import javax.swing.JButton; import javax.swing.JTextField; import java.awt.*; import java.awt.event.*; import javax.swing.*; class fares extends JPanel{ private static final long serialVersionUID = 1L; public static int xaxis1,xaxis2,yaxis3,yaxis4; public ControlsB(square) { final JButton btn1 = new JButton("Resize"); final Box b = Box.createHorizontalBox(); b.add(new JLabel("Please enter range: ")); Box b0 = Box.createVerticalBox();//create a vertical box to stack the controls Box b1 = Box.createHorizontalBox(); // create a horizontal box for the x-axis //x-axis b1.add(new JLabel("mark ")); b1.add(new JLabel("for")); f1.setMaximumSize(new Dimension(100,30)); b1.add(f1); b1.add(new JLabel("till")); f2.setMaximumSize(new Dimension(100,30)); b1.add(f2); //y-axis //this code is not in use at the moment f4.setMaximumSize(new Dimension(100,30)); b2.add(f4); b0.add(b1); add(b); btn1.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent event){ f = Integer.parseInt(f1.getText()); invalidate(); validate(); paint(p);//this is not working... } }); b.add(btn1); } } </code></pre> <p>This is the code that has to be called and repainted:</p> <pre><code>import java.awt.*; import javax.swing.*; class Graph extends JPanel { public static Graphics p; private static final long serialVersionUID = 1L; public static int f; public static int g; @Override public Dimension getPreferredSize() { return (new Dimension(560,560)); } public void paintComponent(Graphics p) { super.paintComponent(p); Graphics2D graph = (Graphics2D)p; Dimension appletSize = this.getSize(); int appletHeight = (int)(appletSize.height); int appletWidth = appletSize.width; //change -ve num to +ve int g3 = Math.abs(g); int a1 = g3 + f; int b1 = a1; int d = (appletWidth / a1); int e = (appletHeight / b1); //draw y-axis numbers //(+ve) while(f != 0){ String s = String.valueOf(f); m = m + b; f = f - 1; } //(-ve) m2 = y; while(f2 != g-1) m2 = m2 + b; f2 = f2 - 1; } //draw x-axis numbers. //(-ve) while(g != 0){ String hy = String.valueOf(g); n = n + a; g = g + 1; } //(+ve) n2 = x + a; while(g2 != g3+1){ String w = String.valueOf(g2); n2 = n2 + a; g2 = g2 + 1; } BasicStroke aLine2 = new BasicStroke(1.0F, BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND); graph.setStroke(aLine2); //notch on numbers and grid lines //left to right, top to bottom notches int v2 = -5; int v5 = 0; while(i &lt;= a1-1){ p.setColor(Color.lightGray);//lightgray line a = a + d; b = b + e; i = i + 1; } } } </code></pre> <p>At the moment the resize button works, but I need to resize my window in order for the graph to respond to the inputs given. Basically when resizing the graph is being redrawn / repainted... now I need this to be done automatically.</p>
 

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