| 1 | // Copyright 2004-2007 Jean-Francois Poilpret |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | package net.sourceforge.hiveboard.drawing; |
| 16 | |
| 17 | import java.awt.Graphics2D; |
| 18 | import java.awt.Point; |
| 19 | import java.util.ArrayList; |
| 20 | import java.util.Iterator; |
| 21 | import java.util.List; |
| 22 | |
| 23 | import javax.swing.JComponent; |
| 24 | |
| 25 | public abstract class AbstractPenFreeTool extends AbstractMouseDragTool |
| 26 | { |
| 27 | public void start(JComponent area) |
| 28 | { |
| 29 | _area = area; |
| 30 | _points = new ArrayList<Point>(INITIAL_SIZE); |
| 31 | } |
| 32 | |
| 33 | public void mouseMotion(Point location) |
| 34 | { |
| 35 | boolean hasScrolled = scroll(_area, location); |
| 36 | _points.add(location); |
| 37 | feedback(hasScrolled); |
| 38 | } |
| 39 | |
| 40 | public DrawingAction stop() |
| 41 | { |
| 42 | // Convert points list into a DrawingAction |
| 43 | int[] x = new int[_points.size()]; |
| 44 | int[] y = new int[_points.size()]; |
| 45 | int i = 0; |
| 46 | for (Point pt: _points) |
| 47 | { |
| 48 | x[i] = pt.x; |
| 49 | y[i] = pt.y; |
| 50 | ++i; |
| 51 | } |
| 52 | _points.clear(); |
| 53 | return createAction(x, y); |
| 54 | } |
| 55 | |
| 56 | abstract protected DrawingAction createAction(int[] x, int[] y); |
| 57 | |
| 58 | abstract protected void preDraw(Graphics2D graf); |
| 59 | |
| 60 | protected void postDraw(Graphics2D graf) |
| 61 | { |
| 62 | } |
| 63 | |
| 64 | // This method provides immediate feedback to writer (not to other participants) |
| 65 | // by drawing the last segment recorded |
| 66 | private void feedback(boolean completeRedraw) |
| 67 | { |
| 68 | Graphics2D graf = (Graphics2D) _area.getGraphics(); |
| 69 | preDraw(graf); |
| 70 | if (completeRedraw) |
| 71 | { |
| 72 | Iterator<Point> iter = _points.iterator(); |
| 73 | Point pt1 = iter.next(); |
| 74 | while (iter.hasNext()) |
| 75 | { |
| 76 | Point pt2 = iter.next(); |
| 77 | graf.drawLine(pt1.x, pt1.y, pt2.x, pt2.y); |
| 78 | pt1 = pt2; |
| 79 | } |
| 80 | } |
| 81 | else |
| 82 | { |
| 83 | int size = _points.size(); |
| 84 | if (size >= 2) |
| 85 | { |
| 86 | Point pt1 = _points.get(size - 2); |
| 87 | Point pt2 = _points.get(size - 1); |
| 88 | graf.drawLine(pt1.x, pt1.y, pt2.x, pt2.y); |
| 89 | } |
| 90 | } |
| 91 | postDraw(graf); |
| 92 | graf.dispose(); |
| 93 | } |
| 94 | |
| 95 | protected JComponent _area; |
| 96 | protected List<Point> _points; |
| 97 | |
| 98 | static private final int INITIAL_SIZE = 500; |
| 99 | } |