Gui totally changed

src/gui/EvaluationFrame.java

@@ -0,0 +1,99 @@
+package gui;
+
+import latex.calculator.TeXCalculator;
+import latex.formulaextractor.FormulaExtractor;
+import latex.parser.ExpressionParser;
+import latex.structure.Node;
+
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+import java.util.Arrays;
+
+import static gui.GuiUtils.INSETS;
+
+/**
+ * Created with IntelliJ IDEA.
+ * User: Evgeniy
+ * Date: 14.11.12
+ * Time: 23:47
+ */
+public class EvaluationFrame extends JFrame {
+    private JLabel formulaLabel = new JLabel();
+    private String formula;
+    private Node formulaAST;
+
+    private String[] names;
+    private double[] values;
+
+    private TeXCalculator calc = new TeXCalculator();
+
+    public EvaluationFrame(final SingleFormulaPanel parent, final String formula) {
+        this.formula = formula;
+        formulaAST = GuiUtils.PARSER_FOR_GUI.parse(formula);
+        setTitle("Formula evaluation");
+        setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);
+        setLayout(new GridBagLayout());
+
+        formulaLabel.setIcon(GuiUtils.generateIcon(formula));
+
+        addWindowListener(new WindowAdapter() {
+            public void windowClosing(WindowEvent e) {
+                parent.resetEvaluationFrame();
+                dispose();
+            }
+        });
+
+        add(formulaLabel, new GridBagConstraints(0, 0, 2, 1, 1, 0,
+                GridBagConstraints.NORTH, GridBagConstraints.HORIZONTAL, new Insets(20, 50, 20, 50), 0, 0));
+
+        names = calc.valsRequiredAsArray(formulaAST);
+        values = new double[names.length];
+
+        for (int i = 0; i < names.length; ++i) {
+            final JLabel variableLabel = new JLabel();
+            variableLabel.setIcon(GuiUtils.generateIcon(names[i] + " ="));
+
+            final JTextField valueText = new JTextField();
+            valueText.setText(String.valueOf(values[i] = calc.getVal(names[i])));
+            calc.setVal(names[i], calc.getVal(names[i]));
+
+            add(variableLabel, new GridBagConstraints(0, i + 1, 1, 1, 0, 0,
+                    GridBagConstraints.NORTH, GridBagConstraints.HORIZONTAL, GuiUtils.INSETS, 0, 0));
+            add(valueText, new GridBagConstraints(1, i + 1, 1, 1, 0, 0,
+                    GridBagConstraints.NORTH, GridBagConstraints.HORIZONTAL, GuiUtils.INSETS, 0, 0));
+
+            final int _i = i;
+            valueText.addActionListener(new ActionListener() {
+                @Override
+                public void actionPerformed(ActionEvent e) {
+                    try {
+                        values[_i] = Double.parseDouble(valueText.getText());
+                        updateResult();
+                    } catch (Exception ex) {
+                    }
+                }
+            });
+
+        }
+
+        updateResult();
+
+        setMinimumSize(new Dimension(400, 50));
+        setLocationRelativeTo(null);
+        pack();
+        setVisible(true);
+    }
+
+    private void updateResult() {
+        try {
+            calc.setContext(names, values);
+            formulaLabel.setIcon(GuiUtils.generateIcon(formula + " = " + calc.calculate(formulaAST)));
+        } catch (Exception e) {
+            formulaLabel.setIcon(GuiUtils.generateIcon(formula + " = ?"));
+        }
+    }
+}

src/gui/GuiUtils.java

@@ -0,0 +1,23 @@
+package gui;
+
+import latex.parser.ExpressionParser;
+import org.scilab.forge.jlatexmath.TeXConstants;
+import org.scilab.forge.jlatexmath.TeXFormula;
+
+import javax.swing.*;
+import java.awt.*;
+
+/**
+ * Created with IntelliJ IDEA.
+ * User: Evgeniy
+ * Date: 15.11.12
+ * Time: 0:03
+ */
+public class GuiUtils {
+    public static final Insets INSETS = new Insets(5, 5, 5, 5);
+    public static final ExpressionParser PARSER_FOR_GUI = new ExpressionParser();
+
+    public static Icon generateIcon(String formula) {
+        return new TeXFormula(formula).createTeXIcon(TeXConstants.STYLE_DISPLAY, 20);
+    }
+}