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org.smallmind.swing.slider.MultiThumbSlider Maven / Gradle / Ivy
/*
* Copyright (c) 2007 through 2024 David Berkman
*
* This file is part of the SmallMind Code Project.
*
* The SmallMind Code Project is free software, you can redistribute
* it and/or modify it under either, at your discretion...
*
* 1) The terms of GNU Affero General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* ...or...
*
* 2) The terms of the Apache License, Version 2.0.
*
* The SmallMind Code Project is distributed in the hope that it will
* be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License or Apache License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* and the Apache License along with the SmallMind Code Project. If not, see
* .
*
* Additional permission under the GNU Affero GPL version 3 section 7
* ------------------------------------------------------------------
* If you modify this Program, or any covered work, by linking or
* combining it with other code, such other code is not for that reason
* alone subject to any of the requirements of the GNU Affero GPL
* version 3.
*/
package org.smallmind.swing.slider;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.SystemColor;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.util.Dictionary;
import javax.swing.ImageIcon;
import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.SwingConstants;
public class MultiThumbSlider extends JComponent implements MouseMotionListener, MouseListener, ThumbListener {
private static final ImageIcon HORIZONTAL_THUMB_ICON = new ImageIcon(ClassLoader.getSystemResource("org/smallmind/swing/system/horizontal_thumb_16.png"));
private static final ImageIcon VERTICAL_THUMB_ICON = new ImageIcon(ClassLoader.getSystemResource("org/smallmind/swing/system/vertical_thumb_16.png"));
public static final int HORIZONTAL = SwingConstants.HORIZONTAL;
public static final int VERTICAL = SwingConstants.VERTICAL;
private MultiThumbModel model;
private Dictionary labelDictionary;
private Integer selectedThumbIndex;
private boolean paintTrack = true;
private boolean paintTickMarks = true;
private boolean paintLabels = true;
private int selectedThumbOffset;
private int orientation = HORIZONTAL;
private int leftSideAdjustment;
private int rightSideAdjustment;
private int majorTickSpacing = 0;
private int minorTickSpacing = 0;
public MultiThumbSlider () {
this(HORIZONTAL, new DefaultMultiThumbModel());
}
public MultiThumbSlider (int orientation) {
this(orientation, new DefaultMultiThumbModel());
}
public MultiThumbSlider (MultiThumbModel model) {
this(HORIZONTAL, model);
}
public MultiThumbSlider (int orientation, MultiThumbModel model) {
this.orientation = orientation;
this.model = model;
setFont(new JLabel().getFont().deriveFont(Font.BOLD));
setDoubleBuffered(true);
model.addThumbListener(this);
addMouseListener(this);
addMouseMotionListener(this);
}
public synchronized MultiThumbModel getModel () {
return model;
}
public synchronized void setModel (MultiThumbModel model) {
this.model.removeThumbListener(this);
this.model = model;
this.model.addThumbListener(this);
}
public synchronized int getOrientation () {
return orientation;
}
public synchronized void setOrientation (int orientation) {
this.orientation = orientation;
}
public int getMinimumValue () {
return model.getMinimumValue();
}
public void setMinimumValue (int minimumValue) {
model.setMaximumValue(minimumValue);
}
public int getMaximumValue () {
return model.getMaximumValue();
}
public void setMaximumValue (int maximumValue) {
model.setMaximumValue(maximumValue);
}
public synchronized boolean isPaintTrack () {
return paintTrack;
}
public synchronized void setPaintTrack (boolean paintTrack) {
this.paintTrack = paintTrack;
}
public synchronized boolean isPaintTickMarks () {
return paintTickMarks;
}
public synchronized void setPaintTickMarks (boolean paintTickMarks) {
this.paintTickMarks = paintTickMarks;
}
public synchronized boolean isPaintLabels () {
return paintLabels;
}
public synchronized void setPaintLabels (boolean paintLabels) {
this.paintLabels = paintLabels;
}
public synchronized int getMinorTickSpacing () {
return minorTickSpacing;
}
public synchronized void setMinorTickSpacing (int minorTickSpacing) {
this.minorTickSpacing = minorTickSpacing;
}
public synchronized int getMajorTickSpacing () {
return majorTickSpacing;
}
public synchronized void setMajorTickSpacing (int majorTickSpacing) {
this.majorTickSpacing = majorTickSpacing;
}
public synchronized Dictionary getLabelDictionary () {
return labelDictionary;
}
public synchronized void setLabelDictionary (Dictionary labelDictionary) {
this.labelDictionary = labelDictionary;
}
public int getThumbCount () {
return model.getThumbCount();
}
public int[] getThumbValues () {
return model.getThumbValues();
}
public int getThumbValue (int thumbIndex) {
return model.getThumbValue(thumbIndex);
}
public void addThumb (int thumbValue) {
model.addThumb(thumbValue);
}
public void removeThumb (int thumbIndex) {
model.removeThumb(thumbIndex);
}
public int getTrackLeftEdge () {
return 7 - leftSideAdjustment;
}
public int getTrackRightEdge () {
return ((orientation == HORIZONTAL) ? getWidth() : getHeight()) - (7 + rightSideAdjustment);
}
public Dimension getPreferredSize () {
if (orientation == HORIZONTAL) {
return new Dimension(0, 16 + ((paintTickMarks) ? 11 : 0) + ((paintLabels) ? getFontMetrics(getFont()).getAscent() + 1 : 0));
} else {
return new Dimension(16 + ((paintTickMarks) ? 11 : 0) + ((paintLabels) ? getMaxLabelWidth() + 4 : 0), 0);
}
}
public Dimension getMaximumSize () {
if (orientation == HORIZONTAL) {
return new Dimension(Short.MAX_VALUE, 16 + ((paintTickMarks) ? 11 : 0) + ((paintLabels) ? getFontMetrics(getFont()).getAscent() + 1 : 0));
} else {
return new Dimension(16 + ((paintTickMarks) ? 11 : 0) + ((paintLabels) ? getMaxLabelWidth() + 4 : 0), Short.MAX_VALUE);
}
}
private int getMaxLabelWidth () {
FontMetrics fontMetrics = getFontMetrics(getFont());
String label;
int maxWidth = 0;
int width;
if (majorTickSpacing > 0) {
for (int mark = getMinimumValue(); mark <= getMaximumValue(); mark += majorTickSpacing) {
label = (getLabelDictionary() != null) ? getLabelDictionary().get(mark) : String.valueOf(mark);
if ((width = fontMetrics.stringWidth(label)) > maxWidth) {
maxWidth = width;
}
}
}
return maxWidth;
}
@Override
public void mouseClicked (MouseEvent mouseEvent) {
}
@Override
public void mousePressed (MouseEvent mouseEvent) {
int pressedThumbIndex;
if ((orientation == HORIZONTAL) && (mouseEvent.getY() < 16)) {
if ((pressedThumbIndex = getThumbIndexForPosition(mouseEvent.getX())) >= 0) {
selectedThumbIndex = pressedThumbIndex;
selectedThumbOffset = mouseEvent.getX() - (getTrackLeftEdge() + positionForValue(model.getThumbValue(selectedThumbIndex)));
} else {
selectedThumbIndex = null;
}
} else if (mouseEvent.getX() < 16) {
if ((pressedThumbIndex = getThumbIndexForPosition(mouseEvent.getY())) >= 0) {
selectedThumbIndex = pressedThumbIndex;
selectedThumbOffset = (getTrackRightEdge() - positionForValue(model.getThumbValue(selectedThumbIndex))) - mouseEvent.getY();
} else {
selectedThumbIndex = null;
}
}
}
@Override
public void mouseReleased (MouseEvent mouseEvent) {
selectedThumbIndex = null;
}
@Override
public void mouseEntered (MouseEvent mouseEvent) {
}
@Override
public void mouseExited (MouseEvent mouseEvent) {
}
@Override
public void mouseDragged (MouseEvent mouseEvent) {
if (selectedThumbIndex != null) {
int proposedPosition;
if (orientation == HORIZONTAL) {
proposedPosition = mouseEvent.getX() - selectedThumbOffset - getTrackLeftEdge();
} else {
proposedPosition = getTrackRightEdge() - mouseEvent.getY() - selectedThumbOffset;
}
int proposedValue = valueForPosition(proposedPosition);
int currentValue = model.getThumbValue(selectedThumbIndex);
if (proposedValue != currentValue) {
int minimumValue = getMinimumValue();
int maximumValue = getMaximumValue();
int thumbValue;
int thumbPosition;
for (int index = 0; index < model.getThumbCount(); index++) {
if (index != selectedThumbIndex) {
thumbValue = model.getThumbValue(index);
thumbPosition = positionForValue(thumbValue);
if (thumbValue < currentValue) {
if (valueForPosition(thumbPosition + 15) > minimumValue) {
minimumValue = valueForPosition(thumbPosition + 15);
while (positionForValue(minimumValue) < thumbPosition + 15) {
minimumValue++;
}
}
}
if (thumbValue > currentValue) {
if (valueForPosition(thumbPosition - 15) < maximumValue) {
maximumValue = valueForPosition(thumbPosition - 15);
while (positionForValue(maximumValue) > thumbPosition - 15) {
maximumValue--;
}
}
}
}
}
if (proposedValue < minimumValue) {
proposedValue = minimumValue;
}
if (proposedValue > maximumValue) {
proposedValue = maximumValue;
}
model.moveThumb(selectedThumbIndex, proposedValue);
}
}
}
@Override
public void mouseMoved (MouseEvent mouseEvent) {
}
@Override
public void thumbAdded (ThumbEvent thumbEvent) {
repaint();
}
@Override
public void thumbRemoved (ThumbEvent thumbEvent) {
repaint();
}
@Override
public void thumbMoved (ThumbEvent thumbEvent) {
repaint();
}
private int getThumbIndexForPosition (int position) {
int thumbPosition;
for (int index = 0; index < model.getThumbCount(); index++) {
thumbPosition = positionForValue(model.getThumbValue(index));
if (orientation == HORIZONTAL) {
if ((position >= getTrackLeftEdge() + thumbPosition - 7) && (position <= getTrackLeftEdge() + thumbPosition + 7)) {
return index;
}
} else {
if ((position >= getTrackRightEdge() - thumbPosition - 7) && (position <= getTrackRightEdge() - thumbPosition + 7)) {
return index;
}
}
}
return -1;
}
public Integer valueForPosition (int position) {
if (position <= getTrackLeftEdge()) {
return model.getMinimumValue();
} else if (position >= getTrackRightEdge()) {
return model.getMaximumValue();
} else {
return (int)((model.getMaximumValue() - model.getMinimumValue()) * (position / ((double)(getTrackRightEdge() - getTrackLeftEdge()))));
}
}
public int positionForValue (int value) {
return (int)((getTrackRightEdge() - getTrackLeftEdge()) * (value - getMinimumValue()) / ((double)(getMaximumValue() - getMinimumValue())));
}
public synchronized void paint (Graphics g) {
leftSideAdjustment = 0;
rightSideAdjustment = 0;
g.setFont(getFont());
((Graphics2D)g).setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
if (paintLabels && (majorTickSpacing > 0) && (orientation == HORIZONTAL)) {
String label;
int width = getWidth();
int textPosition;
int labelWidth;
int leftOverrun;
int rightOverrun;
for (int mark = getMinimumValue(); mark <= getMaximumValue(); mark += majorTickSpacing) {
label = (getLabelDictionary() != null) ? getLabelDictionary().get(mark) : String.valueOf(mark);
textPosition = (int)((width - 14) * (mark - getMinimumValue()) / ((double)(getMaximumValue() - getMinimumValue())));
labelWidth = g.getFontMetrics().stringWidth(label);
if (((leftOverrun = (textPosition + 7) - (labelWidth / 2)) < 0) && (leftOverrun < leftSideAdjustment)) {
leftSideAdjustment = leftOverrun;
}
if (((rightOverrun = (textPosition + 7) + (labelWidth / 2) - width) > 0) && (rightOverrun > rightSideAdjustment)) {
rightSideAdjustment = rightOverrun;
}
}
}
if (paintTrack) {
paintTrack(g);
}
if (paintTickMarks) {
paintTickMarks(g);
}
if (paintLabels) {
paintLabels(g);
}
paintThumb(g);
paintBorder(g);
}
private void paintThumb (Graphics g) {
for (int index = 0; index < model.getThumbCount(); index++) {
if (orientation == HORIZONTAL) {
g.drawImage(HORIZONTAL_THUMB_ICON.getImage(), getTrackLeftEdge() + positionForValue(model.getThumbValue(index)) - 7, 0, null);
} else {
g.drawImage(VERTICAL_THUMB_ICON.getImage(), 0, getTrackRightEdge() - positionForValue(model.getThumbValue(index)) - 7, null);
}
}
}
private void paintTrack (Graphics g) {
if (orientation == HORIZONTAL) {
g.setColor(SystemColor.controlDkShadow);
g.drawRect(getTrackLeftEdge(), 5, getTrackRightEdge() - getTrackLeftEdge() - 1, 5);
g.setColor(SystemColor.controlShadow);
g.drawLine(getTrackLeftEdge() + 1, 6, getTrackRightEdge() - 2, 6);
} else {
g.setColor(SystemColor.controlDkShadow);
g.drawRect(5, getTrackLeftEdge(), 5, getTrackRightEdge() - getTrackLeftEdge() - 1);
g.setColor(SystemColor.controlShadow);
g.drawLine(6, getTrackLeftEdge() + 1, 6, getTrackRightEdge() - 2);
}
}
private void paintTickMarks (Graphics g) {
if (minorTickSpacing > 0) {
g.setColor(SystemColor.controlShadow);
for (int mark = getMinimumValue(); mark <= getMaximumValue(); mark += minorTickSpacing) {
if (orientation == HORIZONTAL) {
g.drawLine(getTrackLeftEdge() + positionForValue(mark), 20, getTrackLeftEdge() + positionForValue(mark), 23);
} else {
g.drawLine(20, getTrackRightEdge() - positionForValue(mark), 23, getTrackRightEdge() - positionForValue(mark));
}
}
}
if (majorTickSpacing > 0) {
g.setColor(SystemColor.controlShadow);
for (int mark = getMinimumValue(); mark <= getMaximumValue(); mark += majorTickSpacing) {
if (orientation == HORIZONTAL) {
g.drawLine(getTrackLeftEdge() + positionForValue(mark), 20, getTrackLeftEdge() + positionForValue(mark), 26);
} else {
g.drawLine(20, getTrackRightEdge() - positionForValue(mark), 26, getTrackRightEdge() - positionForValue(mark));
}
}
}
}
private void paintLabels (Graphics g) {
FontMetrics fontMetrics = getFontMetrics(getFont());
String label;
if (majorTickSpacing > 0) {
g.setColor(SystemColor.controlText);
for (int mark = getMinimumValue(); mark <= getMaximumValue(); mark += majorTickSpacing) {
label = (getLabelDictionary() != null) ? getLabelDictionary().get(mark) : String.valueOf(mark);
if (orientation == HORIZONTAL) {
g.drawString(label, getTrackLeftEdge() + positionForValue(mark) - (fontMetrics.stringWidth(label) / 2), (paintTickMarks) ? 28 + fontMetrics.getAscent() : 17 + fontMetrics.getAscent());
} else {
g.drawString(label, (paintTickMarks) ? 31 : 20, getTrackRightEdge() - positionForValue(mark) + (fontMetrics.getAscent() / 2));
}
}
}
}
}
