editietypedialog.java

一个简单的CellEditor的例子 希望给学习java的朋友一点帮助

package com.intotherain.examples.SimpleCellEditor.CellEditors;

import org.eclipse.jface.util.Geometry;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Dialog;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Monitor;
import org.eclipse.swt.widgets.Shell;

import com.intotherain.examples.SimpleCellEditor.model.IETypeEnum;
import com.intotherain.examples.SimpleCellEditor.model.Record;

/**
 * 
 * @author intotherain
 *
 */
class EditIETypeDialog extends Dialog {

    private Record record;

    IETypeEnum result;

    Button button_1;

    Button button_2;

    Button button_3;

    public EditIETypeDialog(Shell parentShell, Record record) {
        super(parentShell, SWT.DIALOG_TRIM | SWT.APPLICATION_MODAL);
        this.record = record;
    }

    public void createContents(final Shell shell) {

        final Group group = new Group(shell, SWT.NONE);

        final GridData gridData = new GridData(GridData.HORIZONTAL_ALIGN_CENTER
                | GridData.VERTICAL_ALIGN_END);
        gridData.heightHint = 84;
        gridData.widthHint = 173;
        group.setLayoutData(gridData);
        group.setLayout(new GridLayout());

        button_1 = new Button(group, SWT.CHECK);
        button_1.setText("Internet Explorer"); //$NON-NLS-1$
        button_1.addSelectionListener(new SelectionAdapter() {
            public void widgetSelected(SelectionEvent e) {
                if (button_1.getSelection()) {
                    button_2.setSelection(false);
                    button_3.setSelection(false);
                }
            }

        });

        button_2 = new Button(group, SWT.CHECK);
        button_2.setText("Opera"); //$NON-NLS-1$
        button_2.addSelectionListener(new SelectionAdapter() {

            public void widgetSelected(SelectionEvent e) {
                if (button_2.getSelection()) {
                    button_1.setSelection(false);
                    button_3.setSelection(false);
                }
            }

        });

        button_3 = new Button(group, SWT.CHECK);
        button_3.setText("Firefox"); //$NON-NLS-1$
        button_3.addSelectionListener(new SelectionAdapter() {

            public void widgetSelected(SelectionEvent e) {
                if (button_3.getSelection())
                    button_1.setSelection(false);
                button_2.setSelection(false);
            }

        });

        final Composite composite = new Composite(shell, SWT.NONE);
        final GridData gridData_1 = new GridData(GridData.VERTICAL_ALIGN_END);
        gridData_1.heightHint = 27;
        gridData_1.widthHint = 190;
        composite.setLayoutData(gridData_1);
        final GridLayout gridLayout = new GridLayout();
        gridLayout.numColumns = 2;
        composite.setLayout(gridLayout);

        final Button button_ok = new Button(composite, SWT.NONE);
        final GridData gridData_2 = new GridData();
        gridData_2.widthHint = 87;
        button_ok.setLayoutData(gridData_2);
        button_ok.setText("Ok"); //$NON-NLS-1$
        button_ok.addSelectionListener(new SelectionAdapter() {

            public void widgetSelected(SelectionEvent e) {
                result = IETypeEnum.Other;
                if (button_1.getSelection())
                    result = IETypeEnum.MisrcoSoft_IE;
                else if (button_2.getSelection())
                    result = IETypeEnum.Opera;
                else if (button_3.getSelection())
                    result = IETypeEnum.FireFox;
                shell.close();
            }
        });

        final Button button_cancel = new Button(composite, SWT.NONE);
        final GridData gridData_3 = new GridData();
        gridData_3.widthHint = 80;
        button_cancel.setLayoutData(gridData_3);
        button_cancel.setText("Cancel"); 
        button_cancel.addSelectionListener(new SelectionAdapter() {
            public void widgetSelected(SelectionEvent e) {
                result = null;
                shell.close();
            }
        });

    }

    //init checkbox
    private void initSelection() {

        switch (record.getIeType()) {
        case MisrcoSoft_IE:
            button_1.setSelection(true);
            break;
        case Opera:
            button_2.setSelection(true);
            break;
        case FireFox:
            button_3.setSelection(true);
            break;
        default:
            break;
        }
    }

    public IETypeEnum open() {
        Shell shell = new Shell(getParent(), getStyle());
        shell.setText("Choose your IE type");
        shell.setSize(207, 184);
        shell.setLayout(new GridLayout());
        createContents(shell);

        initSelection();

        shell.pack();
        centerShell(shell);
        shell.open();

        Display display = getParent().getDisplay();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch()) {
                display.sleep();
            }
        }

        // Return the entered value, or null
        return result;
    }
    
    private void centerShell(Shell shell){       
        Composite parent = shell.getParent();

        Monitor monitor = shell.getDisplay().getPrimaryMonitor();
        if (parent != null) {
            monitor = parent.getMonitor();
        }

        Rectangle monitorBounds = monitor.getClientArea();
        Point centerPoint;
        if (parent != null) {
            centerPoint = Geometry.centerPoint(parent.getBounds());
        } else {
            centerPoint = Geometry.centerPoint(monitorBounds);
        }
        Point initialSize = shell.getSize();
        int x = centerPoint.x - (initialSize.x / 2);
        int y = centerPoint.y - (initialSize.y / 2);
        shell.setLocation(x, y);
    }
}