net.karlmartens.ui.dialog.ConfigureColumnsDialog.java Source code

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Here is the source code for net.karlmartens.ui.dialog.ConfigureColumnsDialog.java

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/**
 *   Copyright 2012 Karl Martens
 *
 *   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.
 *
 *   net.karlmartens.ui, is a library of UI widgets
 */
package net.karlmartens.ui.dialog;

import java.util.Arrays;

import net.karlmartens.ui.Activator;
import net.karlmartens.ui.widget.GridChooser;
import net.karlmartens.ui.widget.GridChooserColumn;
import net.karlmartens.ui.widget.GridChooserItem;
import net.karlmartens.ui.widget.Table;
import net.karlmartens.ui.widget.TableColumn;

import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.IDialogSettings;
import org.eclipse.jface.dialogs.TitleAreaDialog;
import org.eclipse.jface.layout.GridDataFactory;
import org.eclipse.jface.layout.GridLayoutFactory;
import org.eclipse.jface.layout.LayoutConstants;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Shell;

/**
 * @author karl
 * 
 */
public final class ConfigureColumnsDialog extends TitleAreaDialog {

    private static final String DIALOG_SETTINGS_SECTION = "ConfigureColumnsDialogSettings";

    private final Table _table;
    private final String _title;
    private final String _headerTitle;
    private final String _message;

    private GridChooser _columns;
    private int[] _originalIndices;

    public ConfigureColumnsDialog(Shell parentShell, Table table, String title, String headerTitle,
            String message) {
        super(parentShell);
        _table = table;
        _title = title;
        _headerTitle = headerTitle;
        _message = message;
    }

    protected void configureShell(Shell shell) {
        super.configureShell(shell);
        shell.setText(_title);
    }

    protected Control createDialogArea(Composite parent) {
        final Composite parentComposite = (Composite) super.createDialogArea(parent);

        final Composite contents = new Composite(parentComposite, SWT.NONE);
        contents.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

        setTitle(_headerTitle);
        setMessage(_message);

        _columns = new GridChooser(contents);
        _columns.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).create());

        final GridChooserColumn column = new GridChooserColumn(_columns, SWT.NONE);
        column.setWidth(100);

        final int[] originalIndices = new int[_table.getColumnCount()];
        int index = 0;
        for (int i = 0; i < originalIndices.length; i++) {
            final TableColumn c = _table.getColumn(i);
            if (!c.isMoveable() || !c.isHideable())
                continue;

            originalIndices[index++] = i;

            final GridChooserItem item = new GridChooserItem(_columns, SWT.NONE);
            item.setText(c.getText());
            item.setSelected(c.isVisible());
            item.setData(c);
        }

        _originalIndices = Arrays.copyOf(originalIndices, index);

        Dialog.applyDialogFont(parentComposite);

        final Point defaultMargins = LayoutConstants.getMargins();

        GridLayoutFactory//
                .fillDefaults()//
                .numColumns(1)//
                .margins(defaultMargins.x, defaultMargins.y)//
                .generateLayout(contents);

        return contents;
    }

    @Override
    protected void okPressed() {
        for (int i = 0; i < _columns.getItemCount(); i++) {
            final GridChooserItem item = _columns.getItem(i);
            final TableColumn column = (TableColumn) item.getData();
            column.setVisible(item.isSelected());

            if (!column.isVisible())
                continue;

            final int fromIndex = _table.indexOf(column);
            final int toIndex = _originalIndices[item.getSelectionOrder()];
            _table.moveColumn(fromIndex, toIndex);
        }

        super.okPressed();
    }

    @Override
    protected IDialogSettings getDialogBoundsSettings() {
        final Activator activator = Activator.getDefault();
        if (activator == null)
            return null;

        final IDialogSettings settings = activator.getDialogSettings();
        IDialogSettings section = settings.getSection(DIALOG_SETTINGS_SECTION);
        if (section == null)
            section = settings.addNewSection(DIALOG_SETTINGS_SECTION);

        return section;
    }

    protected boolean isResizable() {
        return true;
    }

}