com.sun.glass.ui.monocle.KeyState Maven / Gradle / Ivy
The newest version!
/*
* Copyright (c) 2014, 2022, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.glass.ui.monocle;
import com.sun.glass.events.KeyEvent;
/**
* KeyState is a snapshot of pressed keys
* KeyState is used both to store the current state of key input and to
* describe changes to that state.
*/
class KeyState {
private IntSet keysPressed = new IntSet();
private MonocleWindow window;
private int modifiers;
/** Removes all pressed keys from this state object. */
void clear() {
keysPressed.clear();
modifiers = 0;
}
/** Adds a key to the set of pressed keys. */
void pressKey(int virtualKeyCode) {
keysPressed.addInt(virtualKeyCode);
modifiers |= getModifier(virtualKeyCode);
}
/** Removes a key from the set of pressed keys. */
void releaseKey(int virtualKeyCode) {
keysPressed.removeInt(virtualKeyCode);
modifiers &= ~getModifier(virtualKeyCode);
}
/** Copies the contents of this state object to another.
*
* @param target The KeyState to which to copy this state's data.
*/
void copyTo(KeyState target) {
keysPressed.copyTo(target.keysPressed);
target.window = window;
target.modifiers = modifiers;
}
/** Returns the set of pressed key codes
*
* @return an IntSet containing the key codes of pressed keys
*/
IntSet getKeysPressed() {
return keysPressed;
}
/** Returns the Glass window on which this event state is located . */
MonocleWindow getWindow(boolean recalculateCache) {
if (window == null || recalculateCache) {
window = MonocleWindowManager.getInstance().getFocusedWindow();
}
return window;
}
private static int getModifier(int virtualKeyCode) {
switch (virtualKeyCode) {
case KeyEvent.VK_SHIFT: return KeyEvent.MODIFIER_SHIFT;
case KeyEvent.VK_CONTROL: return KeyEvent.MODIFIER_CONTROL;
case KeyEvent.VK_ALT: return KeyEvent.MODIFIER_ALT;
case KeyEvent.VK_COMMAND: return KeyEvent.MODIFIER_COMMAND;
case KeyEvent.VK_WINDOWS: return KeyEvent.MODIFIER_WINDOWS;
default: return KeyEvent.MODIFIER_NONE;
}
}
/** Returns a mask of modifiers defined in KeyEvent for the keys pressed
* in this state.
*
* @return a mask of KeyEvent modifiers
*/
int getModifiers() {
return modifiers;
}
boolean isShiftPressed() {
return (modifiers & KeyEvent.MODIFIER_SHIFT) != 0;
}
boolean isControlPressed() {
return (modifiers & KeyEvent.MODIFIER_CONTROL) != 0;
}
@Override
public String toString() {
return "KeyState[modifiers=" + modifiers + ",keys=" + keysPressed + "]";
}
}