/*
* Copyright 2013-2017 consulo.io
*
* 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.
*/
package consulo.ui.laf;
import com.intellij.openapi.util.Factory;
import com.intellij.ui.Gray;
import com.intellij.ui.JBColor;
import com.intellij.ui.LightColors;
import com.intellij.util.ui.GraphicsUtil;
import com.intellij.util.ui.JBUI;
import com.intellij.util.ui.RegionPainter;
import com.intellij.util.ui.UIUtil;
import consulo.util.ui.OwnScrollBarUI;
import org.jetbrains.annotations.NotNull;
import javax.swing.*;
import javax.swing.event.ChangeEvent;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.basic.BasicScrollBarUI;
import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
/**
* @author VISTALL
* @since 5/10/17
*/
public class MacButtonlessScrollbarUI extends BasicScrollBarUI implements OwnScrollBarUI {
@SuppressWarnings({"MethodOverridesStaticMethodOfSuperclass", "UnusedDeclaration"})
public static ComponentUI createUI(JComponent c) {
return new MacButtonlessScrollbarUI();
}
/**
* @return color for thumb. return JBColor but for now dark variant is not supported
*/
private static JBColor getThumbColor() {
return new JBColor(Gray._200, Gray._80);
}
private static JBColor getTrackBackground() {
return new JBColor(LightColors.SLIGHTLY_GRAY, UIUtil.getListBackground());
}
private static JBColor getTrackBorderColor() {
return new JBColor(Gray._230, UIUtil.getListBackground());
}
private static final BasicStroke ourBorderStroke = new BasicStroke();
private static Factory<JButton> EMPTY_BUTTON_FACTORY = EmptyButton::new;
private final MouseMotionAdapter myMouseMotionListener;
private final MouseAdapter myMouseListener;
private Factory<JButton> myIncreaseButtonFactory = EMPTY_BUTTON_FACTORY;
private boolean myMouseIsOverThumb = false;
protected MacButtonlessScrollbarUI() {
myMouseMotionListener = new MouseMotionAdapter() {
@Override
public void mouseMoved(MouseEvent e) {
boolean inside = isOverThumb(e.getPoint());
if (inside != myMouseIsOverThumb) {
myMouseIsOverThumb = inside;
e.getComponent().repaint();
}
}
};
myMouseListener = new MouseAdapter() {
@Override
public void mouseExited(MouseEvent e) {
if (myMouseIsOverThumb) {
myMouseIsOverThumb = false;
e.getComponent().repaint();
}
}
};
}
@Override
public void layoutContainer(Container scrollbarContainer) {
try {
super.layoutContainer(scrollbarContainer);
}
catch (NullPointerException ignore) {
//installUI is not performed yet or uninstallUI has set almost every field to null. Just ignore it //IDEA-89674
}
}
@Override
protected ModelListener createModelListener() {
return new ModelListener() {
@Override
public void stateChanged(ChangeEvent e) {
if (scrollbar != null) {
super.stateChanged(e);
}
}
};
}
public int getDecrementButtonHeight() {
return decrButton.getHeight();
}
public int getIncrementButtonHeight() {
return incrButton.getHeight();
}
@Override
public void installUI(JComponent c) {
super.installUI(c);
scrollbar.setFocusable(false);
}
@Override
protected void installDefaults() {
final int incGap = UIManager.getInt("ScrollBar.incrementButtonGap");
final int decGap = UIManager.getInt("ScrollBar.decrementButtonGap");
try {
UIManager.put("ScrollBar.incrementButtonGap", 0);
UIManager.put("ScrollBar.decrementButtonGap", 0);
super.installDefaults();
}
finally {
UIManager.put("ScrollBar.incrementButtonGap", incGap);
UIManager.put("ScrollBar.decrementButtonGap", decGap);
}
}
@Override
protected void installListeners() {
super.installListeners();
scrollbar.addMouseListener(myMouseListener);
scrollbar.addMouseMotionListener(myMouseMotionListener);
}
private boolean isOverThumb(Point p) {
final Rectangle bounds = getThumbBounds();
return bounds != null && bounds.contains(p);
}
@Override
public Rectangle getThumbBounds() {
return super.getThumbBounds();
}
@Override
protected void uninstallListeners() {
if (scrollTimer != null) {
// it is already called otherwise
super.uninstallListeners();
}
}
@Override
protected void paintTrack(Graphics g, JComponent c, Rectangle bounds) {
g.setColor(getTrackBackground());
g.fillRect(bounds.x, bounds.y, bounds.width, bounds.height);
g.setColor(getTrackBorderColor());
if (isVertical()) {
g.drawLine(bounds.x, bounds.y, bounds.x, bounds.y + bounds.height);
}
else {
g.drawLine(bounds.x, bounds.y, bounds.x + bounds.width, bounds.y);
}
RegionPainter<Object> painter = UIUtil.getClientProperty(c, TRACK);
if (painter != null) {
painter.paint((Graphics2D)g, bounds.x, bounds.y, bounds.width, bounds.height, null);
}
}
@Override
protected Dimension getMinimumThumbSize() {
final int thickness = getThickness();
return isVertical() ? new Dimension(thickness, thickness * 2) : new Dimension(thickness * 2, thickness);
}
protected int getThickness() {
return 12;
}
@Override
public Dimension getMaximumSize(JComponent c) {
int thickness = getThickness();
return new Dimension(thickness, thickness);
}
@Override
public Dimension getMinimumSize(JComponent c) {
return getMaximumSize(c);
}
@Override
public Dimension getPreferredSize(JComponent c) {
return getMaximumSize(c);
}
@Override
protected void paintThumb(Graphics g, JComponent c, Rectangle thumbBounds) {
if (thumbBounds.isEmpty() || !scrollbar.isEnabled()) {
return;
}
g.translate(thumbBounds.x, thumbBounds.y);
paintMaxiThumb((Graphics2D)g, thumbBounds);
g.translate(-thumbBounds.x, -thumbBounds.y);
}
private void paintMaxiThumb(Graphics2D g, Rectangle thumbBounds) {
final boolean vertical = isVertical();
int hGap = JBUI.scale(vertical ? 2 : 1);
int vGap = JBUI.scale(vertical ? 1 : 2);
int w = adjustThumbWidth(thumbBounds.width - hGap * 2);
int h = thumbBounds.height - vGap * 2;
GraphicsUtil.setupAAPainting(g);
final Stroke stroke = g.getStroke();
g.setStroke(ourBorderStroke);
g.setColor(adjustColor(getThumbColor()));
g.fillRoundRect(hGap, vGap, w, h, 8, 8);
g.setStroke(stroke);
}
@Override
public boolean getSupportsAbsolutePositioning() {
return true;
}
protected int adjustThumbWidth(int width) {
return width;
}
protected Color adjustColor(Color c) {
if(!myMouseIsOverThumb) {
return c;
}
final int sign = UIUtil.isUnderDarkBuildInLaf() ? -1 : 1;
int shift = UIUtil.isUnderDarkBuildInLaf() ? 20 : 40;
return Gray.get(Math.max(0, Math.min(255, c.getRed() - sign * shift)));
}
private boolean isVertical() {
return scrollbar.getOrientation() == Adjustable.VERTICAL;
}
@Override
protected JButton createIncreaseButton(int orientation) {
return myIncreaseButtonFactory.create();
}
@Override
protected JButton createDecreaseButton(int orientation) {
return new EmptyButton();
}
@Override
public void setIncreaseButtonFactory(@NotNull Factory<JButton> buttonFactory) {
myIncreaseButtonFactory = buttonFactory;
}
private static class EmptyButton extends JButton {
private EmptyButton() {
setFocusable(false);
setRequestFocusEnabled(false);
}
@Override
public Dimension getMaximumSize() {
return new Dimension(0, 0);
}
@Override
public Dimension getPreferredSize() {
return getMaximumSize();
}
@Override
public Dimension getMinimumSize() {
return getMaximumSize();
}
}
}