package nodebox.client;

import nodebox.node.Node;

import nodebox.node.NodeLibrary;

import nodebox.node.Parameter;

import javax.swing.*;

import java.awt.*;

public class ExpressionWindow extends AbstractParameterEditor {

private JTextArea expressionArea;

private JTextArea errorArea;

public ExpressionWindow(Parameter parameter) {

super(parameter);

}

public Component getContentArea() {

expressionArea = new JTextArea(getParameter().getExpression());

expressionArea.setFont(Theme.EDITOR_FONT);

expressionArea.setBorder(null);

JScrollPane expressionScroll = new JScrollPane(expressionArea, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);

expressionScroll.setBorder(BorderFactory.createEtchedBorder());

errorArea = new JTextArea();

errorArea.setFont(Theme.EDITOR_FONT);

errorArea.setBorder(null);

errorArea.setBackground(Theme.EXPRESSION_ERROR_BACKGROUND_COLOR);

errorArea.setEditable(false);

errorArea.setForeground(Theme.EXPRESSION_ERROR_FOREGROUND_COLOR);

JScrollPane errorScroll = new JScrollPane(errorArea, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);

errorScroll.setBorder(BorderFactory.createEtchedBorder());

JSplitPane split = new JSplitPane(JSplitPane.VERTICAL_SPLIT, expressionScroll, errorScroll);

split.setBorder(null);

split.setDividerLocation(150);

split.setDividerSize(2);

return split;

}

public void valueChanged(Parameter source) {

// Don't change the expression area if the expression is the same.

// This would cause an infinite loop of setExpression/valueChanged calls.

if (expressionArea.getText().equals(getParameter().getExpression())) return;

expressionArea.setText(getParameter().getExpression());

}

public boolean save() {

expressionArea.requestFocus();

NodeBoxDocument doc = NodeBoxDocument.getCurrentDocument();

if (doc == null) throw new RuntimeException("No current active document.");

doc.setParameterExpression(getParameter(), expressionArea.getText());

if (getParameter().hasExpressionError()) {

errorArea.setText(getParameter().getExpressionError().toString());

return false;

} else {

errorArea.setText("");

return true;

}

}

public static void main(String[] args) {

NodeLibrary testLibrary = new NodeLibrary("test");

Node node = Node.ROOT_NODE.newInstance(testLibrary, "test");

Parameter pX = node.addParameter("x", Parameter.Type.FLOAT);

AbstractParameterEditor win = new ExpressionWindow(pX);

win.setVisible(true);

}

}