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A Java cross-platform look and feel for JRE 1.6u17 and later. This is developed from Synth, and is based on forms seen in sea glass, that is, bits of glass washed up on the shore by the sea.
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/*
 * Copyright (c) 2009 Kathryn Huxtable and Kenneth Orr.
 *
 * This file is part of the SeaGlass Pluggable Look and Feel.
 *
 * 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.
 * 
 * $Id$
 */
package com.seaglasslookandfeel.painter;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Shape;

import javax.swing.JComponent;
import javax.swing.JSpinner;
import javax.swing.JSpinner.DefaultEditor;

import com.seaglasslookandfeel.painter.AbstractRegionPainter.PaintContext.CacheMode;
import com.seaglasslookandfeel.painter.util.ShapeGenerator.CornerSize;
import com.seaglasslookandfeel.painter.util.ShapeGenerator.CornerStyle;

/**
 * SpinnerPreviousButtonPainter implementation.
 */
public final class SpinnerPreviousButtonPainter extends AbstractCommonColorsPainter {
    public static enum Which {
        BACKGROUND_DISABLED,
        BACKGROUND_ENABLED,
        BACKGROUND_FOCUSED,
        BACKGROUND_PRESSED_FOCUSED,
        BACKGROUND_PRESSED,
        FOREGROUND_DISABLED,
        FOREGROUND_ENABLED,
        FOREGROUND_FOCUSED,
        FOREGROUND_PRESSED_FOCUSED,
        FOREGROUND_PRESSED,
    }

    private Color             spinnerPrevBorderTopEnabled      = decodeColor("spinnerPrevBorderTopEnabled");
    private Color             spinnerPrevInteriorTopEnabled    = decodeColor("spinnerPrevInteriorTopEnabled");
    private Color             spinnerPrevInteriorBottomEnabled = decodeColor("spinnerPrevInteriorBottomEnabled");
    private Color             spinnerPrevInteriorPressedTop    = decodeColor("spinnerPrevInteriorPressedTop");
    private Color             spinnerPrevInteriorPressedBottom = decodeColor("spinnerPrevInteriorPressedBottom");
    private Color             spinnerPrevTopLineEnabled        = decodeColor("spinnerPrevTopLineEnabled");
    private Color             spinnerPrevTopLinePressed        = decodeColor("spinnerPrevTopLinePressed");
    private Color             scrollBarThumbBorderBasePressed  = decodeColor("scrollBarThumbBorderBasePressed");

    private Color             scrollBarThumbBorderTopPressed   = deriveColor(scrollBarThumbBorderBasePressed, -0.002239f, 0.041885f, 0f, 0);
    private TwoColors         spinnerPrevBorderEnabled         = new TwoColors(spinnerPrevBorderTopEnabled, scrollBarThumbBorderTopPressed);
    private TwoColors         spinnerPrevBorderPressed         = new TwoColors(spinnerPrevBorderTopEnabled, scrollBarThumbBorderTopPressed);
    private TwoColors         spinnerPrevBorderDisabled        = disable(spinnerPrevBorderEnabled);

    private TwoColors         spinnerPrevInteriorEnabled       = new TwoColors(spinnerPrevInteriorTopEnabled,
                                                                   spinnerPrevInteriorBottomEnabled);
    private TwoColors         spinnerPrevInteriorPressed       = new TwoColors(spinnerPrevInteriorPressedTop,
                                                                   spinnerPrevInteriorPressedBottom);
    private TwoColors         spinnerPrevInteriorDisabled      = desaturate(desaturate(spinnerPrevInteriorEnabled));

    private Color             spinnerPrevTopLineDisabled       = desaturate(spinnerPrevTopLineEnabled);

    private PaintContext      ctx;
    private CommonControlState type;
    private boolean           focused;
    private boolean           isForeground;

    public SpinnerPreviousButtonPainter(Which state) {
        super();
        this.ctx = new PaintContext(CacheMode.NO_CACHING);

        type = getButtonType(state);
        focused = (state == Which.BACKGROUND_FOCUSED || state == Which.BACKGROUND_PRESSED_FOCUSED 
                || state == Which.FOREGROUND_FOCUSED || state == Which.FOREGROUND_PRESSED_FOCUSED);

        isForeground = isForeground(state);
    }

    @Override
    protected void doPaint(Graphics2D g, JComponent c, int width, int height, Object[] extendedCacheKeys) {
        if (isForeground) {
            paintArrow(g, width, height);
        } else {
            paintButton(g, c, width, height);
        }
    }

    @Override
    protected PaintContext getPaintContext() {
        return ctx;
    }

    private CommonControlState getButtonType(Which state) {
        switch (state) {
        case BACKGROUND_DISABLED:
        case FOREGROUND_DISABLED:
            return CommonControlState.DISABLED;
        case BACKGROUND_ENABLED:
        case BACKGROUND_FOCUSED:
        case FOREGROUND_ENABLED:
        case FOREGROUND_FOCUSED:
            return CommonControlState.ENABLED;
        case BACKGROUND_PRESSED_FOCUSED:
        case BACKGROUND_PRESSED:
        case FOREGROUND_PRESSED_FOCUSED:
        case FOREGROUND_PRESSED:
            return CommonControlState.PRESSED;
        }
        return null;
    }

    private boolean isForeground(Which state) {
        switch (state) {
        case FOREGROUND_DISABLED:
        case FOREGROUND_ENABLED:
        case FOREGROUND_FOCUSED:
        case FOREGROUND_PRESSED_FOCUSED:
        case FOREGROUND_PRESSED:
            return true;
        default:
            return false;
        }
    }

    private void paintButton(Graphics2D g, JComponent c, int width, int height) {
        boolean useToolBarColors = isInToolBar(c);
        Shape s;

        JSpinner spinner = (JSpinner) c.getParent();
        boolean editorFocused = false;
        JComponent editor = spinner.getEditor();
        if (editor instanceof DefaultEditor) {
            editorFocused = ((DefaultEditor)editor).getTextField().isFocusOwner();
        }
        if (focused || editorFocused) {
            s = createButtonShape(0, 0, width, height, CornerSize.OUTER_FOCUS);
            g.setPaint(getFocusPaint(s, FocusType.OUTER_FOCUS, useToolBarColors));
            g.fill(s);

            s = createButtonShape(0, 0, width - 1, height - 1, CornerSize.INNER_FOCUS);
            g.setPaint(getFocusPaint(s, FocusType.INNER_FOCUS, useToolBarColors));
            g.fill(s);
        }

        s = createButtonShape(0, 0, width - 2, height - 2, CornerSize.BORDER);
        g.setPaint(getSpinnerPrevBorderPaint(s, type));
        g.fill(s);

        s = createButtonShape(1, 1, width - 4, height - 4, CornerSize.INTERIOR);
        g.setPaint(getSpinnerPrevInteriorPaint(s, type));
        g.fill(s);

        s = shapeGenerator.createRectangle(1, 0, width - 4, 1);
        g.setPaint(getSpinnerPrevTopLinePaint(s, type));
        g.fill(s);
    }

    private void paintArrow(Graphics2D g, int width, int height) {
        Shape s = createArrowShape(width, height);
        g.setPaint(getCommonArrowPaint(s, type));
        g.fill(s);
    }

    private Shape createButtonShape(int x, int y, int width, int height, CornerSize size) {
        return shapeGenerator.createRoundRectangle(x, y, width, height, size, CornerStyle.SQUARE, CornerStyle.SQUARE, CornerStyle.ROUNDED,
            CornerStyle.SQUARE);
    }

    private Shape createArrowShape(int left, int height) {
        int centerX = left / 2 - 3;
        int centerY = height / 2;
        return shapeGenerator.createArrowDown(centerX, centerY - 2, 4, 3);
    }

    public Paint getSpinnerPrevBorderPaint(Shape s, CommonControlState type) {
        TwoColors colors = getSpinnerPrevBorderColors(type);
        return createVerticalGradient(s, colors);
    }

    public Paint getSpinnerPrevTopLinePaint(Shape s, CommonControlState type) {
        return getSpinnerPrevTopLineColors(type);
    }

    public Paint getSpinnerPrevInteriorPaint(Shape s, CommonControlState type) {
        TwoColors colors = getSpinnerPrevInteriorColors(type);
        return createVerticalGradient(s, colors);
    }

    private TwoColors getSpinnerPrevBorderColors(CommonControlState type) {
        switch (type) {
        case DISABLED:
            return spinnerPrevBorderDisabled;
        case ENABLED:
            return spinnerPrevBorderEnabled;
        case PRESSED:
            return spinnerPrevBorderPressed;
        }
        return null;
    }

    private TwoColors getSpinnerPrevInteriorColors(CommonControlState type) {
        switch (type) {
        case DISABLED:
            return spinnerPrevInteriorDisabled;
        case ENABLED:
            return spinnerPrevInteriorEnabled;
        case PRESSED:
            return spinnerPrevInteriorPressed;
        }
        return null;
    }

    private Color getSpinnerPrevTopLineColors(CommonControlState type) {
        switch (type) {
        case DISABLED:
            return spinnerPrevTopLineDisabled;
        case ENABLED:
            return spinnerPrevTopLineEnabled;
        case PRESSED:
            return spinnerPrevTopLinePressed;
        }
        return null;
    }
}