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substance look feel » org » jvnet » substance » SubstanceMenuBackgroundDelegate.java
/*
 * Copyright (c) 2005-2008 Substance 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 Substance Kirill Grouchnikov 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.jvnet.substance;

import java.awt.*;

import javax.swing.*;

import org.jvnet.lafwidget.animation.FadeKind;
import org.jvnet.lafwidget.animation.FadeState;
import org.jvnet.lafwidget.layout.TransitionLayout;
import org.jvnet.substance.color.ColorScheme;
import org.jvnet.substance.painter.highlight.SubstanceHighlightUtils;
import org.jvnet.substance.theme.SubstanceTheme;
import org.jvnet.substance.utils.*;
import org.jvnet.substance.utils.SubstanceConstants.MenuGutterFillKind;

/**
 * Delegate for painting background of menu items.
 * 
 * @author Kirill Grouchnikov
 */
public class SubstanceMenuBackgroundDelegate {
  /**
   * Delegate for painting fill background.
   */
  private SubstanceFillBackgroundDelegate fillBackgroundDelegate;

  /**
   * Creates a new background delegate for menu items.
   * 
   * @param fillAlpha
   *            Alphs attribute for the fill.
   */
  public SubstanceMenuBackgroundDelegate(float fillAlpha) {
    this.fillBackgroundDelegate = new SubstanceFillBackgroundDelegate(
        fillAlpha);
  }

  // /**
  // * Paints the highlight background for the specified menu item.
  // *
  // * @param g
  // * Graphic context.
  // * @param menuItem
  // * Menu item.
  // * @param width
  // * Background width.
  // * @param height
  // * Background height.
  // * @param theme
  // * Theme for the background.
  // * @param borderAlpha
  // * Border alpha.
  // */
  // private void paintHighlight(Graphics g, JMenuItem menuItem,
  // ComponentState currState, ComponentState prevState, int width,
  // int height, float borderAlpha) {
  // SubstanceHighlightUtils.paintHighlight(g, menuItem, currState,
  // prevState, new Rectangle(0, 0, menuItem.getWidth(), menuItem
  // .getHeight()), borderAlpha);
  // }

  /**
   * Updates the specified menu item with the background that matches the
   * provided parameters.
   * 
   * @param g
   *            Graphic context.
   * @param menuItem
   *            Menu item.
   * @param bgColor
   *            Current background color.
   * @param borderAlpha
   *            Border alpha.
   * @param textOffset
   *            The offset of the menu item text.
   */
  public void paintBackground(Graphics g, JMenuItem menuItem, Color bgColor,
      float borderAlpha, int textOffset) {
    if (!menuItem.isShowing())
      return;
    int menuWidth = menuItem.getWidth();
    int menuHeight = menuItem.getHeight();

    Graphics2D graphics = (Graphics2D) g.create();

    if (TransitionLayout.isOpaque(menuItem)) {
      // // menu item is opaque and selected (or armed) -
      // // use background color of the item (with watermark)
      // graphics.setColor(menuItem.getBackground());
      Component comp = menuItem.getParent();
      // graphics.fillRect(0, 0, menuWidth, menuHeight);
      // // System.out.println(menuItem.getText());
      this.fillBackgroundDelegate.setWatermarkAlpha(0.4f);
      while (comp != null) {
        // System.out.println("\t" + comp.getClass().getName());
        if (comp instanceof JMenuItem) {
          break;
        }
        if (comp instanceof JMenuBar) {
          // top-level
          this.fillBackgroundDelegate.setWatermarkAlpha(1.0f);
          break;
        }
        comp = comp.getParent();
      }

      // if (!(menuItem.getParent() instanceof JMenuBar))
      if (TransitionLayout.isOpaque(menuItem)) {
        this.fillBackgroundDelegate.update(graphics, menuItem, false);
      }
      if (menuItem.getParent() instanceof JPopupMenu) {
        if (menuItem.getComponentOrientation().isLeftToRight()) {
          MenuGutterFillKind fillKind = SubstanceCoreUtilities
              .getMenuGutterFillKind();
          if (fillKind != MenuGutterFillKind.NONE) {
            ColorScheme scheme = SubstanceThemeUtilities.getTheme(
                menuItem, ComponentState.DEFAULT)
                .getColorScheme();
            Color leftColor = ((fillKind == MenuGutterFillKind.SOFT_FILL) || (fillKind == MenuGutterFillKind.HARD)) ? scheme
                .getUltraLightColor()
                : scheme.getLightColor();
            Color rightColor = ((fillKind == MenuGutterFillKind.SOFT_FILL) || (fillKind == MenuGutterFillKind.SOFT)) ? scheme
                .getUltraLightColor()
                : scheme.getLightColor();
            GradientPaint gp = new GradientPaint(0, 0, leftColor,
                textOffset, 0, rightColor);
            graphics.setComposite(TransitionLayout
                .getAlphaComposite(menuItem, 0.7f, g));

            // System.out.println(menuItem.getText()
            // + "["
            // + menuItem.isEnabled()
            // + "] : "
            // + ((AlphaComposite) graphics.getComposite())
            // .getAlpha() + ", " + leftColor + "->"
            // + rightColor);
            //
            graphics.setPaint(gp);
            graphics.fillRect(0, 0, textOffset - 2, menuHeight);
          }
        } else {
          // fix for defect 125 - support of RTL menus
          MenuGutterFillKind fillKind = SubstanceCoreUtilities
              .getMenuGutterFillKind();
          if (fillKind != MenuGutterFillKind.NONE) {
            ColorScheme scheme = SubstanceThemeUtilities.getTheme(
                menuItem, ComponentState.DEFAULT)
                .getColorScheme();
            Color leftColor = ((fillKind == MenuGutterFillKind.HARD_FILL) || (fillKind == MenuGutterFillKind.HARD)) ? scheme
                .getLightColor()
                : scheme.getUltraLightColor();
            Color rightColor = ((fillKind == MenuGutterFillKind.HARD_FILL) || (fillKind == MenuGutterFillKind.SOFT)) ? scheme
                .getLightColor()
                : scheme.getUltraLightColor();
            GradientPaint gp = new GradientPaint(textOffset, 0,
                leftColor, menuWidth, 0, rightColor);
            graphics.setComposite(TransitionLayout
                .getAlphaComposite(menuItem, 0.7f, g));
            graphics.setPaint(gp);
            graphics.fillRect(textOffset - 2, 0, menuWidth,
                menuHeight);
          }
        }
      }
    }

    graphics.dispose();
  }

  public static void paintHighlights(Graphics g, JMenuItem menuItem,
      float borderAlpha) {
    Graphics2D graphics = (Graphics2D) g.create();

    ButtonModel model = menuItem.getModel();
    // int menuWidth = menuItem.getWidth();
    // int menuHeight = menuItem.getHeight();

    ComponentState prevState = SubstanceCoreUtilities
        .getPrevComponentState(menuItem);
    ComponentState currState = ComponentState.getState(model, menuItem,
        !(menuItem instanceof JMenu));

    // Compute the alpha values for the animation (the highlights
    // have separate alpha channels, so that rollover animation can start
    // from 0.0 alpha and goes to 0.4 alpha on non-selected cells,
    // but on selected cells can go from 0.7 to 0.9). We need to respect
    // these border values for proper visual transitions
    float startAlpha = SubstanceThemeUtilities.getHighlightAlpha(menuItem,
        prevState);
    float endAlpha = SubstanceThemeUtilities.getHighlightAlpha(menuItem,
        currState);

    SubstanceTheme prevTheme = SubstanceThemeUtilities.getHighlightTheme(
        menuItem, prevState);
    SubstanceTheme currTheme = SubstanceThemeUtilities.getHighlightTheme(
        menuItem, currState);

    FadeState state = SubstanceFadeUtilities.getFadeState(menuItem,
        FadeKind.SELECTION, FadeKind.ARM, FadeKind.ROLLOVER);
    float fadeCoef = 0.0f;
    float totalAlpha = endAlpha;
    if (state != null) {
      fadeCoef = state.getFadePosition();

      // compute the total alpha of the overlays.
      if (state.isFadingIn()) {
        totalAlpha = startAlpha + (endAlpha - startAlpha) * fadeCoef
            / 10.0f;
      } else {
        totalAlpha = startAlpha + (endAlpha - startAlpha)
            * (10.0f - fadeCoef) / 10.0f;
      }

      if (state.isFadingIn())
        fadeCoef = 10.0f - fadeCoef;

      // System.out.println(menuItem.getText() + " from " +
      // prevState.name()
      // + "[" + alphaForPrevBackground + "] to " + currState.name()
      // + "[" + alphaForCurrBackground + "] at " + fadeCoef);
      // System.out.println("From " + prevTheme.getDisplayName() + " to :"
      // + currTheme.getDisplayName());

    }

    // System.out.println(menuItem.getText() + "[" + currState.name() + "]:"
    // + prevTheme.getDisplayName() + "[" + alphaForPrevBackground
    // + "]:" + currTheme.getDisplayName() + "["
    // + alphaForCurrBackground + "]");
    // System.out.println("ARM:" + menuItem.getModel().isArmed() + ", ENA:"
    // + menuItem.getModel().isEnabled() + ", PRE:"
    // + menuItem.getModel().isPressed() + ", ROL:"
    // + menuItem.getModel().isRollover() + ", SEL:"
    // + menuItem.getModel().isSelected());

    // fix for defect 103 - no rollover effects on menu items
    // that are not in the selected menu path
    MenuElement[] selectedMenuPath = MenuSelectionManager.defaultManager()
        .getSelectedPath();
    boolean isRollover = (selectedMenuPath.length == 0);
    for (MenuElement elem : selectedMenuPath) {
      if (elem == menuItem) {
        isRollover = true;
        break;
      }
    }
    isRollover = isRollover && model.isRollover();

    boolean hasHighlight = (state != null) || model.isArmed() || isRollover
        || ((menuItem instanceof JMenu) && model.isSelected());

    if (hasHighlight && (totalAlpha > 0.0f)) {
      graphics.setComposite(TransitionLayout.getAlphaComposite(menuItem,
          totalAlpha, g));
      SubstanceHighlightUtils.paintHighlight(graphics, menuItem,
          new Rectangle(0, 0, menuItem.getWidth(), menuItem
              .getHeight()), borderAlpha, null, currTheme
              .getColorScheme(), prevTheme.getColorScheme(),
          fadeCoef);
      graphics.setComposite(TransitionLayout.getAlphaComposite(menuItem,
          g));
    }
    graphics.dispose();
  }
}
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