fontchooserdialog.java

SWING的界面UI包 SWING的界面UI包

                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addComponent(jPanel2, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 379, Short.MAX_VALUE)
                    .addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 198, Short.MAX_VALUE)
                            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                                .addComponent(jLabel1, javax.swing.GroupLayout.Alignment.LEADING)
                                .addComponent(txtFamily, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 198, Short.MAX_VALUE)))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jScrollPane2, javax.swing.GroupLayout.DEFAULT_SIZE, 99, Short.MAX_VALUE)
                            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                                .addComponent(jLabel2)
                                .addComponent(txtStyle, javax.swing.GroupLayout.DEFAULT_SIZE, 99, Short.MAX_VALUE)))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jScrollPane3, javax.swing.GroupLayout.DEFAULT_SIZE, 70, Short.MAX_VALUE)
                            .addComponent(jLabel3)
                            .addComponent(txtSize, javax.swing.GroupLayout.DEFAULT_SIZE, 70, Short.MAX_VALUE)))
                    .addGroup(layout.createSequentialGroup()
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 231, Short.MAX_VALUE)
                        .addComponent(btnOK)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(btnCancel, javax.swing.GroupLayout.PREFERRED_SIZE, 71, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addContainerGap())
        );

        layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {btnCancel, btnOK});

        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1)
                    .addComponent(jLabel2)
                    .addComponent(jLabel3))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(txtStyle, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(txtFamily, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(txtSize, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(jScrollPane2, 0, 0, Short.MAX_VALUE)
                    .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 123, Short.MAX_VALUE)
                    .addComponent(jScrollPane3, 0, 0, Short.MAX_VALUE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, 105, Short.MAX_VALUE)
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(btnCancel)
                    .addComponent(btnOK))
                .addContainerGap())
        );

        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void btnCancelActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnCancelActionPerformed
        OK = false;
        dispose();
    }//GEN-LAST:event_btnCancelActionPerformed

    private void btnOKActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnOKActionPerformed
        String family = txtFamily.getText();
        if (family.trim().length() == 0) {
            JOptionPane.showMessageDialog(this, "Please choose a font family!", "Error", JOptionPane.ERROR_MESSAGE);
            return;
        }
        String style = txtStyle.getText();
        if (style.trim().length() == 0) {
            JOptionPane.showMessageDialog(this, "Please choose a font style!", "Error", JOptionPane.ERROR_MESSAGE);
            return;
        }
        String size = txtSize.getText();
        if (size.trim().length() == 0) {
            JOptionPane.showMessageDialog(this, "Please choose a font size!", "Error", JOptionPane.ERROR_MESSAGE);
            return;
        }
        try {
            int isize = Integer.parseInt(size);
            if (isize < 3) {
                JOptionPane.showMessageDialog(this, "Font size should be an integer bigger than 2!", "Error", JOptionPane.ERROR_MESSAGE);
                return;
            }
            int istyle = Font.PLAIN;
            if (style.equals("Plain")) {
                istyle = Font.PLAIN;
            } else if (style.equals("Bold")) {
                istyle = Font.BOLD;
            } else if (style.equals("Italic")) {
                istyle = Font.ITALIC;
            } else if (style.equals("Bold Italic")) {
                istyle = Font.ITALIC | Font.BOLD;
            }
            OK = true;
            fontValue = new Font(family, istyle, isize);
            dispose();
        } catch (NumberFormatException e) {
            JOptionPane.showMessageDialog(this, "Font size should be an integer!", "Error", JOptionPane.ERROR_MESSAGE);
        }
    }//GEN-LAST:event_btnOKActionPerformed

    private void lstFamilyValueChanged(javax.swing.event.ListSelectionEvent evt) {//GEN-FIRST:event_lstFamilyValueChanged
        String family = (String) lstFamily.getSelectedValue();
        txtFamily.setText(family);
        refreshPreview();
    }//GEN-LAST:event_lstFamilyValueChanged

    private void lstStyleValueChanged(javax.swing.event.ListSelectionEvent evt) {//GEN-FIRST:event_lstStyleValueChanged
        String style = (String) lstStyle.getSelectedValue();
        txtStyle.setText(style);
        refreshPreview();
    }//GEN-LAST:event_lstStyleValueChanged

    private void lstSizeValueChanged(javax.swing.event.ListSelectionEvent evt) {//GEN-FIRST:event_lstSizeValueChanged
        String size = ((Integer) lstSize.getSelectedValue()).toString();
        txtSize.setText(size);
        refreshPreview();
    }//GEN-LAST:event_lstSizeValueChanged

    private void txtSizeActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_txtSizeActionPerformed
        String tSize = txtSize.getText();
        try {
            int size = Integer.parseInt(tSize);
            if (size < 3) {
                JOptionPane.showMessageDialog(this, "Font size should be an integer bigger than 2!", "Error", JOptionPane.ERROR_MESSAGE);
                return;
            }
            lstSize.setSelectedValue(size, true);
            refreshPreview();
        } catch (NumberFormatException nfe) {
            JOptionPane.showMessageDialog(this, "Font size should be an integer!", "Error", JOptionPane.ERROR_MESSAGE);
        }
    }//GEN-LAST:event_txtSizeActionPerformed

    private void refreshPreview() {
        String family = txtFamily.getText();
        if (family.trim().length() == 0) {
            return;
        }
        String style = txtStyle.getText();
        if (style.trim().length() == 0) {
            return;
        }
        String size = txtSize.getText();
        if (size.trim().length() == 0) {
            return;
        }
        try {
            int isize = Integer.parseInt(size);
            if (isize < 3) {
                return;
            }
            int istyle = Font.PLAIN;
            if (style.equals("Plain")) {
                istyle = Font.PLAIN;
            } else if (style.equals("Bold")) {
                istyle = Font.BOLD;
            } else if (style.equals("Italic")) {
                istyle = Font.ITALIC;
            } else if (style.equals("Bold Italic")) {
                istyle = Font.ITALIC | Font.BOLD;
            }
            Font f = new Font(family, istyle, isize);
            lblPreview.setFont(f);
            lblPreview.setText(f.getFamily() + " " + f.getSize() + " " + style);
        } catch (NumberFormatException e) {
        }
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {
                FontChooserDialog dialog = new FontChooserDialog(new javax.swing.JFrame(), true);
                dialog.addWindowListener(new java.awt.event.WindowAdapter() {

                    public void windowClosing(java.awt.event.WindowEvent e) {
                        System.exit(0);
                    }
                });
                dialog.setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton btnCancel;
    private javax.swing.JButton btnOK;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JPanel jPanel2;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JScrollPane jScrollPane2;
    private javax.swing.JScrollPane jScrollPane3;
    private javax.swing.JLabel lblPreview;
    private javax.swing.JList lstFamily;
    private javax.swing.JList lstSize;
    private javax.swing.JList lstStyle;
    private javax.swing.JTextField txtFamily;
    private javax.swing.JTextField txtSize;
    private javax.swing.JTextField txtStyle;
    // End of variables declaration//GEN-END:variables
}