org.anstis.client.grid.widget.dom.TextBoxDOMElement.java Source code

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Here is the source code for org.anstis.client.grid.widget.dom.TextBoxDOMElement.java

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/*
 * Copyright 2015 JBoss Inc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.anstis.client.grid.widget.dom;

import com.google.gwt.dom.client.Style;
import com.google.gwt.event.dom.client.BlurEvent;
import com.google.gwt.event.dom.client.BlurHandler;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.ui.AbsolutePanel;
import org.anstis.client.grid.model.BaseGridCellValue;
import org.anstis.client.grid.model.IGridCell;
import org.anstis.client.grid.widget.BaseGridWidget;
import org.anstis.client.grid.widget.GridLayer;
import org.anstis.client.grid.widget.context.GridCellRenderContext;
import org.gwtbootstrap3.client.ui.TextBox;

/**
 * A DOMElement for TextBoxes.
 */
public class TextBoxDOMElement extends BaseDOMElement<String, TextBox> {

    private static final int HEIGHT = 16;

    private final TextBox tb = new TextBox();
    private GridCellRenderContext context;

    public TextBoxDOMElement(final GridLayer gridLayer, final BaseGridWidget<?, ?> gridWidget,
            final IDOMElementFactory<String, ?> factory, final AbsolutePanel domElementContainer) {
        super(gridLayer, gridWidget, factory, domElementContainer);
        final Style style = tb.getElement().getStyle();
        style.setWidth(100, Style.Unit.PCT);
        style.setHeight(HEIGHT, Style.Unit.PX);
        style.setPaddingLeft(2, Style.Unit.PX);
        style.setPaddingRight(2, Style.Unit.PX);
        style.setFontSize(10, Style.Unit.PX);

        getContainer().getElement().getStyle().setPaddingLeft(5, Style.Unit.PX);
        getContainer().getElement().getStyle().setPaddingRight(5, Style.Unit.PX);
        getContainer().setWidget(tb);

        tb.addValueChangeHandler(new ValueChangeHandler<String>() {
            @Override
            public void onValueChange(final ValueChangeEvent event) {
                flush();
            }
        });
        tb.addBlurHandler(new BlurHandler() {
            @Override
            public void onBlur(final BlurEvent event) {
                if (context != null) {
                    factory.freeUnusedResources();
                }
            }
        });
    }

    @Override
    public void initialise(final IGridCell<String> cell, final GridCellRenderContext context) {
        this.context = context;
        tb.setText(cell == null ? "" : cell.getValue().getValue());
        final Style style = tb.getElement().getStyle();
        style.setMarginTop((context.getHeight() - HEIGHT) / 2, Style.Unit.PX);
        transform(context);
    }

    @Override
    public TextBox getWidget() {
        return tb;
    }

    @Override
    public void flush(final Command command) {
        if (context != null) {
            final int rowIndex = context.getRowIndex();
            final int columnIndex = context.getColumnIndex();
            final BaseGridWidget<?, ?> widget = context.getWidget();
            context = null;

            final String text = tb.getText();
            if (text.trim().isEmpty()) {
                widget.getModel().deleteCell(rowIndex, columnIndex);

            } else {
                widget.getModel().setCell(rowIndex, columnIndex, new BaseGridCellValue<>(text));
            }
            ((GridLayer) widget.getLayer()).draw(command);

        } else {
            command.execute();
        }
    }

}