/*
* Copyright 2000-2015 JetBrains s.r.o.
*
* 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 com.intellij.util.ui;
import com.intellij.openapi.Disposable;
import com.intellij.openapi.util.SystemInfo;
import com.intellij.util.ObjectUtils;
import com.intellij.util.PairFunction;
import com.intellij.util.containers.ContainerUtil;
import org.jetbrains.annotations.NotNull;
import javax.swing.*;
import java.awt.*;
import java.awt.event.InputEvent;
import java.awt.event.MouseEvent;
import java.util.List;
/**
* @author gregsh
*
* Note: seems to be unnecessary in Java 8 and up.
*/
public class JBSwingUtilities {
private static final boolean LEGACY_JDK = !SystemInfo.isJavaVersionAtLeast("1.8");
/**
* Replaces SwingUtilities#isLeftMouseButton() for consistency with other button-related methods
*
* @see SwingUtilities#isLeftMouseButton(MouseEvent)
*/
public static boolean isLeftMouseButton(MouseEvent anEvent) {
return LEGACY_JDK ? (anEvent.getModifiersEx() & InputEvent.BUTTON1_DOWN_MASK) > 0 : SwingUtilities.isLeftMouseButton(anEvent);
}
/**
* Replaces SwingUtilities#isMiddleMouseButton() due to the fact that BUTTON2_MASK == Event.ALT_MASK
*
* @see SwingUtilities#isMiddleMouseButton(MouseEvent)
* @see InputEvent#BUTTON2_MASK
*/
public static boolean isMiddleMouseButton(MouseEvent anEvent) {
return LEGACY_JDK ? (anEvent.getModifiersEx() & InputEvent.BUTTON2_DOWN_MASK) > 0 : SwingUtilities.isMiddleMouseButton(anEvent);
}
/**
* Replaces SwingUtilities#isRightMouseButton() due to the fact that BUTTON3_MASK == Event.META_MASK
*
* @see SwingUtilities#isRightMouseButton(MouseEvent)
* @see InputEvent#BUTTON3_MASK
*/
public static boolean isRightMouseButton(MouseEvent anEvent) {
return LEGACY_JDK ? (anEvent.getModifiersEx() & InputEvent.BUTTON3_DOWN_MASK) > 0 : SwingUtilities.isRightMouseButton(anEvent);
}
private static final List<PairFunction<JComponent, Graphics2D, Graphics2D>> ourGlobalTransform =
ContainerUtil.createEmptyCOWList();
public static Disposable addGlobalCGTransform(final PairFunction<JComponent, Graphics2D, Graphics2D> fun) {
ourGlobalTransform.add(fun);
return new Disposable() {
@Override
public void dispose() {
ourGlobalTransform.remove(fun);
}
};
}
@NotNull
public static Graphics2D runGlobalCGTransform(@NotNull JComponent c, @NotNull Graphics g) {
Graphics2D gg = (Graphics2D)g;
for (PairFunction<JComponent, Graphics2D, Graphics2D> transform : ourGlobalTransform) {
gg = ObjectUtils.notNull(transform.fun(c, gg));
}
return gg;
}
}