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Building modern, elegant and fast Swing applications
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/*
 * Copyright (c) 2005-2021 Radiance Kirill Grouchnikov. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  o Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 *  o 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.
 *
 *  o Neither the name of the copyright holder 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 (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.pushingpixels.trident.api.swing;

import org.pushingpixels.trident.api.Timeline.TimelineState;
import org.pushingpixels.trident.api.callback.TimelineCallbackAdapter;

import java.awt.*;
import java.util.concurrent.atomic.AtomicBoolean;

public class SwingRepaintCallback extends TimelineCallbackAdapter {
    private Component comp;

    private Rectangle rect;

    private AtomicBoolean repaintGuard;

    public SwingRepaintCallback(Component comp) {
        this(comp, null);
    }

    public SwingRepaintCallback(Component comp, Rectangle rect) {
        if (comp == null) {
            throw new NullPointerException("Component must be non-null");
        }
        this.comp = comp;
        if (rect != null) {
            this.rect = new Rectangle(rect);
        }
    }

    public synchronized void setAutoRepaintMode(boolean autoRepaintMode) {
        if (autoRepaintMode) {
            this.repaintGuard = null;
        } else {
            this.repaintGuard = new AtomicBoolean(false);
        }
    }

    public synchronized void forceRepaintOnNextPulse() {
        if (this.repaintGuard == null) {
            throw new IllegalArgumentException(
                    "This method cannot be called on auto-repaint callback");
        }
        this.repaintGuard.set(true);
    }

    public synchronized void setRepaintRectangle(Rectangle rect) {
        if (rect == null) {
            this.rect = null;
        } else {
            this.rect = new Rectangle(rect);
        }
    }

    @Override
    public synchronized void onTimelinePulse(float durationFraction, float timelinePosition) {
        repaintAsNecessary();
    }

    @Override
    public synchronized void onTimelineStateChanged(TimelineState oldState, TimelineState newState,
            float durationFraction, float timelinePosition) {
        repaintAsNecessary();
    }

    private void repaintAsNecessary() {
        if (this.repaintGuard != null) {
            if (!this.repaintGuard.compareAndSet(true, false)) {
                // no need to repaint
                return;
            }
        }

        if (this.rect == null)
            this.comp.repaint();
        else
            this.comp.repaint(this.rect.x, this.rect.y, this.rect.width, this.rect.height);
    }
}