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POCanvas does not update after clicking a button which tells it to repaint
 

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  1. POCanvas does not update after clicking a button which tells it to repaint
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    <p>Why does the Grid mze not update? The buttons should edit rows and cols then will update Grid mze's cells yet it is not. If I cliked on the + button aligned with H, mze should update to a 26x25 grid but nothing happens and only Columns + 1 appear on the console.</p> <pre><code> import javax.swing.*; import java.awt.*; import javax.swing.GroupLayout.*; import javax.swing.LayoutStyle.ComponentPlacement; import javax.swing.border.LineBorder; import javax.swing.border.MatteBorder; import java.awt.event.ActionListener; import java.awt.event.ActionEvent; public class csc extends JFrame{ public csc(String s){ super(s); setSize(800,600); //code generated from eclipse JPanel panel = new JPanel(); panel.setBackground(SystemColor.control); GroupLayout groupLayout = new GroupLayout(getContentPane()); groupLayout.setHorizontalGroup( groupLayout.createParallelGroup(Alignment.LEADING) .addGroup(groupLayout.createSequentialGroup() .addContainerGap() .addComponent(panel, GroupLayout.DEFAULT_SIZE, 774, Short.MAX_VALUE) .addContainerGap()) ); groupLayout.setVerticalGroup( groupLayout.createParallelGroup(Alignment.LEADING) .addGroup(groupLayout.createSequentialGroup() .addContainerGap() .addComponent(panel, GroupLayout.DEFAULT_SIZE, 550, Short.MAX_VALUE) .addContainerGap()) ); JPanel scCont = new JPanel(); scCont.setBorder(new MatteBorder(0, 0, 1, 1, (Color) new Color(0, 0, 0))); JPanel cplCont = new JPanel(); GroupLayout gl_panel = new GroupLayout(panel); gl_panel.setHorizontalGroup( gl_panel.createParallelGroup(Alignment.LEADING) .addGroup(gl_panel.createSequentialGroup() .addGap(27) .addComponent(scCont, GroupLayout.PREFERRED_SIZE, 475, GroupLayout.PREFERRED_SIZE) .addGap(18) .addComponent(cplCont, GroupLayout.PREFERRED_SIZE, 235, GroupLayout.PREFERRED_SIZE) .addContainerGap(19, Short.MAX_VALUE)) ); gl_panel.setVerticalGroup( gl_panel.createParallelGroup(Alignment.LEADING) .addGroup(gl_panel.createSequentialGroup() .addGroup(gl_panel.createParallelGroup(Alignment.LEADING) .addGroup(gl_panel.createSequentialGroup() .addGap(131) .addComponent(cplCont, GroupLayout.PREFERRED_SIZE, 249, GroupLayout.PREFERRED_SIZE)) .addGroup(gl_panel.createSequentialGroup() .addGap(35) .addComponent(scCont, GroupLayout.PREFERRED_SIZE, 480, GroupLayout.PREFERRED_SIZE))) .addContainerGap(35, Short.MAX_VALUE)) ); Grid mze = new Grid(4,4,400,400); cscPanel cpl = new cscPanel(this,mze); scCont.setLayout(new BorderLayout(0, 0)); mze = new Grid(cpl.rows,cpl.cols,400,400); mze.setForeground(SystemColor.desktop); scCont.add(mze); GroupLayout gl_cplCont = new GroupLayout(cplCont); gl_cplCont.setHorizontalGroup( gl_cplCont.createParallelGroup(Alignment.LEADING) .addGroup(gl_cplCont.createSequentialGroup() .addContainerGap() .addComponent(cpl, GroupLayout.DEFAULT_SIZE, 215, Short.MAX_VALUE) .addContainerGap()) ); gl_cplCont.setVerticalGroup( gl_cplCont.createParallelGroup(Alignment.LEADING) .addGroup(gl_cplCont.createSequentialGroup() .addContainerGap(GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) .addComponent(cpl, GroupLayout.PREFERRED_SIZE, 419, GroupLayout.PREFERRED_SIZE)) ); cplCont.setLayout(gl_cplCont); panel.setLayout(gl_panel); getContentPane().setLayout(groupLayout); //end of eclipse generated code pack(); setResizable(false); setLocationRelativeTo(null); setDefaultCloseOperation(EXIT_ON_CLOSE); } public static void main(String[] args){ csc MakeMaze = new csc("Catch Torchic!"); MakeMaze.setVisible(true); } } class cscPanel extends JPanel{ static final int MIN_CELLS = 3; static final int MAX_W_CELLS = 50; static final int MAX_H_CELLS = 50; static final int MAX_DELAY = 500; static final int MIN_DELAY = 5; int rows = 25; int cols = 25; private int genDelay = 50; private int solveDelay = 50; JButton bGen; JButton bmm; JButton bSolve; JButton bLoad; JButton bRowsPlus; JButton bRowsMinus; JButton bColsPlus; JButton bColsMinus; private TextField tfRows; private TextField tfCols; private JPanel rowsPanel; private JPanel colsPanel; private JPanel rowsBtnPanel; private JPanel colsBtnPanel; private Grid mze; private csc Fr; private JPanel p = new JPanel(); private cscButtonHandler handler; cscPanel(csc Fr, Grid mze) { this.Fr = Fr; this.mze = mze; setLayout(new GridLayout(11, 1, 0, 3)); this.rowsBtnPanel = new JPanel(); this.colsBtnPanel = new JPanel(); this.rowsBtnPanel.setLayout(new GridLayout(1, 2)); this.colsBtnPanel.setLayout(new GridLayout(1, 2)); this.rowsBtnPanel.add(this.bRowsMinus = new JButton("-")); this.rowsBtnPanel.add(this.bRowsPlus = new JButton("+")); this.colsBtnPanel.add(this.bColsMinus = new JButton("-")); this.colsBtnPanel.add(this.bColsPlus = new JButton("+")); this.rowsPanel = new JPanel(); this.rowsPanel.setLayout(new BorderLayout(2, 0)); this.rowsPanel.add("West", new Label("W")); this.rowsPanel.add("Center", this.tfRows = new TextField(3)); this.rowsPanel.add("East", this.rowsBtnPanel); this.colsPanel = new JPanel(); this.colsPanel.setLayout(new BorderLayout(2, 0)); this.colsPanel.add("West", new Label("H")); this.colsPanel.add("Center", this.tfCols = new TextField(3)); this.colsPanel.add("East", this.colsBtnPanel); this.tfRows.setEditable(false); this.tfCols.setEditable(false); add(this.bLoad = new JButton("LOAD")); add(this.rowsPanel); add(this.colsPanel); add(this.bGen = new JButton("RANDOM")); add(this.bSolve = new JButton("SOLVE")); add(this.bmm = new JButton("MAIN MENU")); this.tfRows.setText(Integer.toString(this.rows)); this.tfCols.setText(Integer.toString(this.cols)); this.bSolve.setEnabled(false); handler = new cscButtonHandler(Fr,this,mze); bGen.addActionListener(handler); bmm.addActionListener(handler); bSolve.addActionListener(handler); bLoad.addActionListener(handler); bRowsPlus.addActionListener(handler); bRowsMinus.addActionListener(handler); bColsPlus.addActionListener(handler); bColsMinus.addActionListener(handler); } void setPlusMinusEnable() { this.bRowsPlus.setEnabled(this.rows &lt; 50); this.bRowsMinus.setEnabled(this.rows &gt; 3); this.bColsPlus.setEnabled(this.cols &lt; 50); this.bColsMinus.setEnabled(this.cols &gt; 3); } void setGenEnable(boolean paramBoolean){ this.bGen.setEnabled(paramBoolean); } void setSolveEnable(boolean paramBoolean) { this.bSolve.setEnabled(paramBoolean); } } class cscButtonHandler implements ActionListener{ csc a; cscPanel b; Grid c; public cscButtonHandler(csc a,cscPanel b, Grid c){ this.a = a; this.b = b; this.c = c; } public void actionPerformed(ActionEvent e){ if(e.getSource() == b.bmm) {System.out.println("Back to MainMenu");} else if(e.getSource() == b.bSolve) {System.out.println("Solve Maze");} else if(e.getSource() == b.bLoad) {System.out.println("Open Load Dialog");} else if(e.getSource() == b.bRowsPlus) {System.out.println("Rows + 1"); b.rows++; c.repaint(b.rows,b.cols,400,400);} else if(e.getSource() == b.bRowsMinus) {System.out.println("Rows - 1"); b.rows--; c.repaint(b.rows,b.cols,400,400);} else if(e.getSource() == b.bColsPlus) {System.out.println("Columns + 1"); b.cols++; c.repaint(b.rows,b.cols,400,400);} else if(e.getSource() == b.bColsMinus) {System.out.println("Columns - 1"); b.cols--; c.repaint(b.rows,b.cols,400,400);} else if(e.getSource() == b.bGen) {System.out.println("Generating Randomly");} } } class Grid extends Canvas{ Cell[][] maze; int rows; int cols; public Grid(int rows, int cols, int h, int w) { this.rows = rows; this.cols = cols; maze = new Cell[rows][cols]; setPreferredSize(new Dimension(h,w)); } public void paint(Graphics g) { int k; double width = getSize().width; double height = getSize().height; double htOfRow = height / (rows); for (k = 0; k &lt; rows; k++) g.drawLine(0, (int) (k * htOfRow) , (int) width, (int) (k * htOfRow) ); double wdOfRow = width / (cols); for (k = 0; k &lt; cols; k++) g.drawLine((int) (k*wdOfRow) , 0,(int) (k*wdOfRow) , (int) height); } } class Cell {} </code></pre>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USDan Joseph Porcioncula
    1. USDan Joseph Porcioncula
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    1. PL
      singulars
      1. LTLinked
    2. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    1. VO
      singulars
      1. POCanvas does not update after clicking a button which tells it to repaint
      1. This table or related slice is empty.
      1. VTDownMod
    2. VO
      singulars
      1. POCanvas does not update after clicking a button which tells it to repaint
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POCanvas does not update after clicking a button which tells it to repaint
      1. This table or related slice is empty.
      1. VTUpMod
    1. CO1) Don't mix Swing with AWT components. 2) For better help sooner, post an [SSCCE](http://sscce.org/). (300+ lines of code is not 'S'hort.) 3) Better to ask one question, per question.
      singulars
      1. POCanvas does not update after clicking a button which tells it to repaint
      1. USAndrew Thompson
    2. COI think there isn't reason for down_voting
      singulars
      1. POCanvas does not update after clicking a button which tells it to repaint
      1. USmKorbel
    3. COokay, will make code shoter;
      singulars
      1. POCanvas does not update after clicking a button which tells it to repaint
      1. USDan Joseph Porcioncula
 

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