org.eclipse.swt.examples.controlexample.ProgressBarTab.java Source code

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Here is the source code for org.eclipse.swt.examples.controlexample.ProgressBarTab.java

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/*******************************************************************************
 * Copyright (c) 2000, 2013 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.examples.controlexample;

import org.eclipse.swt.*;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.layout.*;

class ProgressBarTab extends RangeTab {
    /* Example widgets and groups that contain them */
    ProgressBar progressBar1;
    Group progressBarGroup;

    /* Style widgets added to the "Style" group */
    Button smoothButton;
    Button indeterminateButton;

    /**
     * Creates the Tab within a given instance of ControlExample.
     */
    ProgressBarTab(ControlExample instance) {
        super(instance);
    }

    /**
     * Creates the "Example" group.
     */
    @Override
    void createExampleGroup() {
        super.createExampleGroup();

        /* Create a group for the progress bar */
        progressBarGroup = new Group(exampleGroup, SWT.NONE);
        progressBarGroup.setLayout(new GridLayout());
        progressBarGroup.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
        progressBarGroup.setText("ProgressBar");
    }

    /**
     * Creates the "Example" widgets.
     */
    @Override
    void createExampleWidgets() {

        /* Compute the widget style */
        int style = getDefaultStyle();
        if (horizontalButton.getSelection())
            style |= SWT.HORIZONTAL;
        if (verticalButton.getSelection())
            style |= SWT.VERTICAL;
        if (smoothButton.getSelection())
            style |= SWT.SMOOTH;
        if (borderButton.getSelection())
            style |= SWT.BORDER;
        if (indeterminateButton.getSelection())
            style |= SWT.INDETERMINATE;

        /* Create the example widgets */
        progressBar1 = new ProgressBar(progressBarGroup, style);
    }

    /**
     * Creates the "Style" group.
     */
    @Override
    void createStyleGroup() {
        super.createStyleGroup();

        /* Create the extra widgets */
        smoothButton = new Button(styleGroup, SWT.CHECK);
        smoothButton.setText("SWT.SMOOTH");
        indeterminateButton = new Button(styleGroup, SWT.CHECK);
        indeterminateButton.setText("SWT.INDETERMINATE");
    }

    /**
     * Gets the "Example" widget children.
     */
    @Override
    Widget[] getExampleWidgets() {
        return new Widget[] { progressBar1 };
    }

    /**
     * Returns a list of set/get API method names (without the set/get prefix)
     * that can be used to set/get values in the example control(s).
     */
    @Override
    String[] getMethodNames() {
        return new String[] { "Selection", "State", "ToolTipText" };
    }

    /**
     * Gets the short text for the tab folder item.
     */
    @Override
    String getShortTabText() {
        return "PB";
    }

    /**
     * Gets the text for the tab folder item.
     */
    @Override
    String getTabText() {
        return "ProgressBar";
    }

    /**
     * Sets the state of the "Example" widgets.
     */
    @Override
    void setExampleWidgetState() {
        super.setExampleWidgetState();
        if (indeterminateButton.getSelection()) {
            selectionSpinner.setEnabled(false);
            minimumSpinner.setEnabled(false);
            maximumSpinner.setEnabled(false);
        } else {
            selectionSpinner.setEnabled(true);
            minimumSpinner.setEnabled(true);
            maximumSpinner.setEnabled(true);
        }
        smoothButton.setSelection((progressBar1.getStyle() & SWT.SMOOTH) != 0);
        indeterminateButton.setSelection((progressBar1.getStyle() & SWT.INDETERMINATE) != 0);
    }

    /**
     * Gets the default maximum of the "Example" widgets.
     */
    @Override
    int getDefaultMaximum() {
        return progressBar1.getMaximum();
    }

    /**
     * Gets the default minimim of the "Example" widgets.
     */
    @Override
    int getDefaultMinimum() {
        return progressBar1.getMinimum();
    }

    /**
     * Gets the default selection of the "Example" widgets.
     */
    @Override
    int getDefaultSelection() {
        return progressBar1.getSelection();
    }

    /**
     * Sets the maximum of the "Example" widgets.
     */
    @Override
    void setWidgetMaximum() {
        progressBar1.setMaximum(maximumSpinner.getSelection());
        updateSpinners();
    }

    /**
     * Sets the minimim of the "Example" widgets.
     */
    @Override
    void setWidgetMinimum() {
        progressBar1.setMinimum(minimumSpinner.getSelection());
        updateSpinners();
    }

    /**
     * Sets the selection of the "Example" widgets.
     */
    @Override
    void setWidgetSelection() {
        progressBar1.setSelection(selectionSpinner.getSelection());
        updateSpinners();
    }

    /**
     * Update the Spinner widgets to reflect the actual value set
     * on the "Example" widget.
     */
    void updateSpinners() {
        updateSpinner(minimumSpinner, progressBar1.getMinimum());
        updateSpinner(selectionSpinner, progressBar1.getSelection());
        updateSpinner(maximumSpinner, progressBar1.getMaximum());
    }

    void updateSpinner(Spinner spinner, int selection) {
        if (spinner.getSelection() != selection)
            spinner.setSelection(selection);
    }
}