deyou
87 lines
2.6 KiB
Java
87 lines
2.6 KiB
Java
package gridbag;
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import java.awt.Font;
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import java.awt.GridBagLayout;
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import java.awt.event.ActionListener;
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import javax.swing.BorderFactory;
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import javax.swing.JCheckBox;
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import javax.swing.JComboBox;
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import javax.swing.JFrame;
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import javax.swing.JLabel;
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import javax.swing.JTextArea;
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/**
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* A frame that uses a grid bag layout to arrange font selection components.
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*/
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public class FontFrame extends JFrame
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{
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public static final int TEXT_ROWS = 10;
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public static final int TEXT_COLUMNS = 20;
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private JComboBox<String> face;
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private JComboBox<Integer> size;
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private JCheckBox bold;
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private JCheckBox italic;
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private JTextArea sample;
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public FontFrame()
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{
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GridBagLayout layout = new GridBagLayout();
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setLayout(layout);
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ActionListener listener = event -> updateSample();
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// construct components
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JLabel faceLabel = new JLabel("Face: ");
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face = new JComboBox<>(new String[] { "Serif", "SansSerif", "Monospaced",
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"Dialog", "DialogInput" });
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face.addActionListener(listener);
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JLabel sizeLabel = new JLabel("Size: ");
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size = new JComboBox<>(new Integer[] { 8, 10, 12, 15, 18, 24, 36, 48 });
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size.addActionListener(listener);
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bold = new JCheckBox("Bold");
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bold.addActionListener(listener);
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italic = new JCheckBox("Italic");
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italic.addActionListener(listener);
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sample = new JTextArea(TEXT_ROWS, TEXT_COLUMNS);
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sample.setText("The quick brown fox jumps over the lazy dog");
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sample.setEditable(false);
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sample.setLineWrap(true);
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sample.setBorder(BorderFactory.createEtchedBorder());
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// add components to grid, using GBC convenience class
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add(faceLabel, new GBC(0, 0).setAnchor(GBC.EAST));
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add(face, new GBC(1, 0).setFill(GBC.HORIZONTAL).setWeight(100, 0)
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.setInsets(1));
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add(sizeLabel, new GBC(0, 1).setAnchor(GBC.EAST));
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add(size, new GBC(1, 1).setFill(GBC.HORIZONTAL).setWeight(100, 0)
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.setInsets(1));
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add(bold, new GBC(0, 2, 2, 1).setAnchor(GBC.CENTER).setWeight(100, 100));
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add(italic, new GBC(0, 3, 2, 1).setAnchor(GBC.CENTER).setWeight(100, 100));
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add(sample, new GBC(2, 0, 1, 4).setFill(GBC.BOTH).setWeight(100, 100));
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pack();
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updateSample();
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}
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public void updateSample()
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{
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String fontFace = (String) face.getSelectedItem();
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int fontStyle = (bold.isSelected() ? Font.BOLD : 0)
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+ (italic.isSelected() ? Font.ITALIC : 0);
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int fontSize = size.getItemAt(size.getSelectedIndex());
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Font font = new Font(fontFace, fontStyle, fontSize);
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sample.setFont(font);
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sample.repaint();
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}
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} |