TextFieldImpl.java example

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/*
 * Copyright (c) 2010, Michael Grossmann, Nikolaus Moll
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * * Neither the name of the jo-widgets.org nor the
 * names of its contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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package org.jowidgets.spi.impl.swt.common.widgets;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.FocusAdapter;
import org.eclipse.swt.events.FocusEvent;
import org.eclipse.swt.events.VerifyEvent;
import org.eclipse.swt.events.VerifyListener;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Text;
import org.jowidgets.common.mask.TextMaskMode;
import org.jowidgets.common.types.Markup;
import org.jowidgets.common.verify.IInputVerifier;
import org.jowidgets.spi.impl.mask.TextMaskVerifierFactory;
import org.jowidgets.spi.impl.swt.common.image.SwtImageRegistry;
import org.jowidgets.spi.impl.swt.common.options.SwtOptions;
import org.jowidgets.spi.impl.swt.common.util.AlignmentConvert;
import org.jowidgets.spi.impl.swt.common.util.FontProvider;
import org.jowidgets.spi.impl.verify.InputVerifierHelper;
import org.jowidgets.spi.widgets.setup.ITextFieldSetupSpi;
import org.jowidgets.util.EmptyCheck;

public class TextFieldImpl extends AbstractTextInputControl {

    private VerifyListener inputVerificationListener;
    private Listener showListener;

    public TextFieldImpl(final Object parentUiReference, final ITextFieldSetupSpi setup, final SwtImageRegistry imageRegistry) {
        super(new Text((Composite) parentUiReference, getStyle(setup)), imageRegistry);

        if (SwtOptions.hasInputVerification()) {
            final IInputVerifier maskVerifier = TextMaskVerifierFactory.create(this, setup.getMask());

            final IInputVerifier inputVerifier = InputVerifierHelper.getInputVerifier(maskVerifier, setup);
            if (inputVerifier != null) {
                inputVerificationListener = createVerifyListener(inputVerifier);
                getUiReference().addVerifyListener(inputVerificationListener);
            }
        }

        if (setup.getMaxLength() != null) {
            getUiReference().setTextLimit(setup.getMaxLength().intValue());
        }

        if (SwtOptions.hasInputVerification() && setup.getMask() != null && TextMaskMode.FULL_MASK == setup.getMask().getMode()) {
            setText(setup.getMask().getPlaceholder());
            getUiReference().addFocusListener(new FocusAdapter() {
                @Override
                public void focusGained(final FocusEvent e) {
                    if (getUiReference().getSelectionCount() == 0) {
                        getUiReference().setSelection(0, 0);
                    }
                }
            });
        }

        registerTextControl(getUiReference(), setup.getInputChangeEventPolicy());
    }

    @Override
    public Text getUiReference() {
        return (Text) super.getUiReference();
    }

    @Override
    public String getText() {
        return getUiReference().getText();
    }

    @Override
    public void setText(final String text) {
        if (SwtOptions.hasTextFieldTruncateWorkaround()
            && showListener == null
            && !getUiReference().isVisible()
            && !EmptyCheck.isEmpty(text)) {
            showListener = new ShowListener();
            getUiReference().addListener(SWT.Paint, showListener);
        }
        if (text != null) {
            getUiReference().setText(text);
        }
        else {
            getUiReference().setText("");
        }
        if (!getUiReference().isFocusControl()) {
            fireInputChanged(getText());
        }
    }

    @Override
    protected void registerTextControl(final Text textControl) {
        super.registerTextControl(textControl);
        if (inputVerificationListener != null) {
            getUiReference().addVerifyListener(inputVerificationListener);
        }
    }

    @Override
    protected void unregisterTextControl(final Text textControl) {
        super.unregisterTextControl(textControl);
        if (inputVerificationListener != null) {
            getUiReference().removeVerifyListener(inputVerificationListener);
        }
    }

    @Override
    public void setFontSize(final int size) {
        getUiReference().setFont(FontProvider.deriveFont(getUiReference().getFont(), size));
    }

    @Override
    public void setFontName(final String fontName) {
        getUiReference().setFont(FontProvider.deriveFont(getUiReference().getFont(), fontName));
    }

    @Override
    public void setMarkup(final Markup markup) {
        getUiReference().setFont(FontProvider.deriveFont(getUiReference().getFont(), markup));
    }

    @Override
    public void setSelection(final int start, final int end) {
        getUiReference().setSelection(start, end);
    }

    @Override
    public void select() {
        getUiReference().selectAll();
    }

    @Override
    public void setCaretPosition(final int pos) {
        getUiReference().setSelection(pos, pos);
    }

    @Override
    public int getCaretPosition() {
        return getUiReference().getCaretPosition();
    }

    @Override
    public void setEditable(final boolean editable) {
        getUiReference().setEditable(editable);
    }

    private VerifyListener createVerifyListener(final IInputVerifier verifier) {
        return new VerifyListener() {
            @Override
            public void verifyText(final VerifyEvent verifyEvent) {
                verifyEvent.doit = verifier.verify(
                        getUiReference().getText(),
                        verifyEvent.text,
                        verifyEvent.start,
                        verifyEvent.end);
            }
        };
    }

    private static int getStyle(final ITextFieldSetupSpi setup) {
        int result = AlignmentConvert.convert(setup.getAlignment());
        if (setup.hasBorder()) {
            result = result | SWT.BORDER;
        }
        if (setup.isPasswordPresentation()) {
            result = result | SWT.PASSWORD;
        }
        return result;
    }

    private final class ShowListener implements Listener {
        @Override
        public void handleEvent(final Event event) {
            if (getUiReference().isVisible() && !getUiReference().isFocusControl()) {
                getUiReference().setSelection(new Point(0, 0));
                if (showListener != null) {
                    getUiReference().removeListener(SWT.Paint, showListener);
                    showListener = null;
                }
            }
        }
    };

}