Package org.pushingpixels.substance.internal.utils.combo

Source Code of org.pushingpixels.substance.internal.utils.combo.SubstanceComboPopup

/*
* Copyright (c) 2005-2010 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.pushingpixels.substance.internal.utils.combo;

import java.awt.Component;
import java.awt.Dimension;
import java.awt.GraphicsConfiguration;
import java.awt.Insets;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Toolkit;

import javax.swing.JComboBox;
import javax.swing.JScrollBar;
import javax.swing.ListCellRenderer;
import javax.swing.SwingConstants;
import javax.swing.SwingUtilities;
import javax.swing.plaf.basic.BasicComboPopup;

import org.pushingpixels.substance.internal.ui.SubstanceListUI;
import org.pushingpixels.substance.internal.utils.SubstanceCoreUtilities;
import org.pushingpixels.substance.internal.utils.border.SubstanceBorder;

/**
* Combo popup implementation in <b>Substance</b> look-and-feel. This class is
* <b>for internal use only</b>.
*
* @author Kirill Grouchnikov
*/
public class SubstanceComboPopup extends BasicComboPopup {

  /**
   * Creates combo popup for the specified combobox.
   *
   * @param combo
   *            Combobox.
   */
  public SubstanceComboPopup(JComboBox combo) {
    super(combo);
    // fix for defect 154
    this.setOpaque(true);
    this.list.setBackground(combo.getBackground());
  }

  /*
   * (non-Javadoc)
   *
   * @see javax.swing.plaf.basic.BasicComboPopup#configurePopup()
   */
  @Override
  protected void configurePopup() {
    super.configurePopup();
    setBorder(new SubstanceBorder(new Insets(0, 2, 2, 2)));
  }

  /**
   * Sets the list selection index to the selectedIndex. This method is used
   * to synchronize the list selection with the combo box selection.
   *
   * @param selectedIndex
   *            the index to set the list
   */
  private void setListSelection(int selectedIndex) {
    if (selectedIndex == -1) {
      this.list.clearSelection();
    } else {
      this.list.setSelectedIndex(selectedIndex);
      this.list.ensureIndexIsVisible(selectedIndex);
    }
  }

  /**
   * Calculates the upper left location of the popup.
   *
   * @return The upper left location of the popup.
   */
  private Point getPopupLocation() {
    Dimension popupSize = this.comboBox.getSize();
    Insets insets = this.getInsets();

    // reduce the width of the scrollpane by the insets so that the popup
    // is the same width as the combo box.
    popupSize.setSize(popupSize.width - (insets.right + insets.left), this
        .getPopupHeightForRowCount(this.comboBox.getMaximumRowCount()));
    Rectangle popupBounds = this.computePopupBounds(0, this.comboBox
        .getBounds().height, popupSize.width, popupSize.height);
    Dimension scrollSize = popupBounds.getSize();
    Point popupLocation = popupBounds.getLocation();

    this.scroller.setMaximumSize(scrollSize);
    this.scroller.setPreferredSize(scrollSize);
    this.scroller.setMinimumSize(scrollSize);

    this.list.revalidate();

    return new Point(popupLocation.x, popupLocation.y);
  }

  /*
   * (non-Javadoc)
   *
   * @see javax.swing.plaf.basic.BasicComboPopup#computePopupBounds(int, int,
   * int, int)
   */
  @Override
  protected Rectangle computePopupBounds(int px, int py, int pw, int ph) {
    int popupFlyoutOrientation = SubstanceCoreUtilities
        .getPopupFlyoutOrientation(this.comboBox);
    Insets insets = this.getInsets();
    int dx = 0;
    int dy = 0;
    switch (popupFlyoutOrientation) {
    case SwingConstants.NORTH:
      dy = -ph - (int) this.comboBox.getSize().getHeight() - insets.top
          - insets.bottom;
      break;
    case SwingConstants.CENTER:
      dy = -ph / 2 - (int) this.comboBox.getSize().getHeight() / 2
          - insets.top / 2 - insets.bottom / 2;
      break;
    case SwingConstants.EAST:
      dx = pw + insets.left + insets.right;
      dy = -(int) this.comboBox.getSize().getHeight();
      break;
    case SwingConstants.WEST:
      dx = -pw - insets.left - insets.right;
      dy = -(int) this.comboBox.getSize().getHeight();
    }
    Toolkit toolkit = Toolkit.getDefaultToolkit();
    Rectangle screenBounds;

    // Calculate the desktop dimensions relative to the combo box.
    GraphicsConfiguration gc = this.comboBox.getGraphicsConfiguration();
    Point p = new Point();
    SwingUtilities.convertPointFromScreen(p, this.comboBox);
    if (gc != null) {
      Insets screenInsets = toolkit.getScreenInsets(gc);
      screenBounds = gc.getBounds();
      screenBounds.width -= (screenInsets.left + screenInsets.right);
      screenBounds.height -= (screenInsets.top + screenInsets.bottom);
      screenBounds.x += (p.x + screenInsets.left);
      screenBounds.y += (p.y + screenInsets.top);
    } else {
      screenBounds = new Rectangle(p, toolkit.getScreenSize());
    }

    Rectangle rect = new Rectangle(px + dx, py + dy, pw, ph);
    if ((py + ph > screenBounds.y + screenBounds.height)
        && (ph < screenBounds.height)) {
      rect.y = -rect.height - insets.top - insets.bottom;
    }

    // The following has been taken from JGoodies' Looks implementation
    // for the popup prototype value
    Object popupPrototypeDisplayValue = SubstanceCoreUtilities
        .getComboPopupPrototypeDisplayValue(this.comboBox);
    if (popupPrototypeDisplayValue != null) {
      ListCellRenderer renderer = this.list.getCellRenderer();
      Component c = renderer.getListCellRendererComponent(this.list,
          popupPrototypeDisplayValue, -1, true, true);
      int npw = c.getPreferredSize().width;
      boolean hasVerticalScrollBar = this.comboBox.getItemCount() > this.comboBox
          .getMaximumRowCount();
      if (hasVerticalScrollBar) {
        // Add the scrollbar width.
        JScrollBar verticalBar = this.scroller.getVerticalScrollBar();
        npw += verticalBar.getPreferredSize().width;
      }

      pw = Math.max(pw, npw);
      rect.width = pw;
    }

    return rect;
  }

  /*
   * (non-Javadoc)
   *
   * @see javax.swing.plaf.basic.BasicComboPopup#show()
   */
  @Override
  public void show() {
    this.setListSelection(this.comboBox.getSelectedIndex());

    Point location = this.getPopupLocation();
    this.show(this.comboBox, location.x, location.y);
  }

  /*
   * (non-Javadoc)
   *
   * @see javax.swing.plaf.basic.BasicComboPopup#hide()
   */
  @Override
  public void hide() {
    super.hide();
    SubstanceListUI ui = (SubstanceListUI) this.list.getUI();
    ui.resetRolloverIndex();
    // this.list.putClientProperty(SubstanceListUI.ROLLED_OVER_INDEX, null);
  }

  public JComboBox getCombobox() {
    return this.comboBox;
  }
}
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