1 /*******************************************************************************
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2 * Copyright (c) 2013 Association for Decentralized Information Management
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3 * in Industry THTH ry.
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4 * All rights reserved. This program and the accompanying materials
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5 * are made available under the terms of the Eclipse Public License v1.0
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6 * which accompanies this distribution, and is available at
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7 * http://www.eclipse.org/legal/epl-v10.html
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10 * Semantum Oy - initial API and implementation
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11 *******************************************************************************/
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12 package org.simantics.modeling.ui.symbolEditor;
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14 import org.simantics.g2d.canvas.ICanvasContext;
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15 import org.simantics.g2d.participant.GridPainter;
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16 import org.simantics.scl.runtime.function.Function1;
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17 import org.simantics.utils.datastructures.hints.HintListenerAdapter;
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18 import org.simantics.utils.datastructures.hints.IHintContext;
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19 import org.simantics.utils.datastructures.hints.IHintObservable;
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20 import org.simantics.utils.datastructures.hints.IHintContext.Key;
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23 * A function and a listener for diagram grid visibility. The function
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24 * returns the current grid visibility as a Boolean.
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26 * @author Tuukka Lehtonen
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28 public class GridVisibleFunction extends HintListenerAdapter implements Function1<Object, Boolean> {
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32 public GridVisibleFunction(ICanvasContext ctx) {
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33 IHintContext hctx = ctx.getDefaultHintContext();
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35 hintChanged(hctx, GridPainter.KEY_GRID_ENABLED, null, hctx.getHint(GridPainter.KEY_GRID_ENABLED));
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37 hctx.addKeyHintListener(GridPainter.KEY_GRID_ENABLED, this);
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41 public void hintChanged(IHintObservable sender, Key key, Object oldValue, Object newValue) {
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42 enabled = Boolean.valueOf(Boolean.TRUE.equals(newValue));
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46 public Boolean apply(Object p0) {
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