1*b1cdbd2cSJim Jagielski /************************************************************** 2*b1cdbd2cSJim Jagielski * 3*b1cdbd2cSJim Jagielski * Licensed to the Apache Software Foundation (ASF) under one 4*b1cdbd2cSJim Jagielski * or more contributor license agreements. See the NOTICE file 5*b1cdbd2cSJim Jagielski * distributed with this work for additional information 6*b1cdbd2cSJim Jagielski * regarding copyright ownership. The ASF licenses this file 7*b1cdbd2cSJim Jagielski * to you under the Apache License, Version 2.0 (the 8*b1cdbd2cSJim Jagielski * "License"); you may not use this file except in compliance 9*b1cdbd2cSJim Jagielski * with the License. You may obtain a copy of the License at 10*b1cdbd2cSJim Jagielski * 11*b1cdbd2cSJim Jagielski * http://www.apache.org/licenses/LICENSE-2.0 12*b1cdbd2cSJim Jagielski * 13*b1cdbd2cSJim Jagielski * Unless required by applicable law or agreed to in writing, 14*b1cdbd2cSJim Jagielski * software distributed under the License is distributed on an 15*b1cdbd2cSJim Jagielski * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16*b1cdbd2cSJim Jagielski * KIND, either express or implied. See the License for the 17*b1cdbd2cSJim Jagielski * specific language governing permissions and limitations 18*b1cdbd2cSJim Jagielski * under the License. 19*b1cdbd2cSJim Jagielski * 20*b1cdbd2cSJim Jagielski *************************************************************/ 21*b1cdbd2cSJim Jagielski 22*b1cdbd2cSJim Jagielski 23*b1cdbd2cSJim Jagielski 24*b1cdbd2cSJim Jagielski import java.awt.event.ActionListener; 25*b1cdbd2cSJim Jagielski import java.awt.GridBagLayout; 26*b1cdbd2cSJim Jagielski import java.awt.GridBagConstraints; 27*b1cdbd2cSJim Jagielski import javax.swing.*; 28*b1cdbd2cSJim Jagielski 29*b1cdbd2cSJim Jagielski 30*b1cdbd2cSJim Jagielski /** The simple screen reader (SSR) registers at the toolkit as focus listener 31*b1cdbd2cSJim Jagielski and displays information about the currently focused object. 32*b1cdbd2cSJim Jagielski */ 33*b1cdbd2cSJim Jagielski public class SSR 34*b1cdbd2cSJim Jagielski implements ActionListener 35*b1cdbd2cSJim Jagielski { 36*b1cdbd2cSJim Jagielski /** Just pass the control to the SSR class. 37*b1cdbd2cSJim Jagielski */ main(String args[])38*b1cdbd2cSJim Jagielski public static void main (String args[]) 39*b1cdbd2cSJim Jagielski { 40*b1cdbd2cSJim Jagielski new SSR (); 41*b1cdbd2cSJim Jagielski } 42*b1cdbd2cSJim Jagielski 43*b1cdbd2cSJim Jagielski 44*b1cdbd2cSJim Jagielski 45*b1cdbd2cSJim Jagielski 46*b1cdbd2cSJim Jagielski /** Create a new instance of the simple screen reader. 47*b1cdbd2cSJim Jagielski */ SSR()48*b1cdbd2cSJim Jagielski public SSR () 49*b1cdbd2cSJim Jagielski { 50*b1cdbd2cSJim Jagielski Layout (); 51*b1cdbd2cSJim Jagielski 52*b1cdbd2cSJim Jagielski // Create the event handler and tell it where to display information 53*b1cdbd2cSJim Jagielski // about the currently focused accessible object. 54*b1cdbd2cSJim Jagielski maEventHandler = new EventHandler (); 55*b1cdbd2cSJim Jagielski maEventHandler.addObjectDisplay (maTextualDisplay); 56*b1cdbd2cSJim Jagielski maEventHandler.addObjectDisplay (maGraphicalDisplay); 57*b1cdbd2cSJim Jagielski } 58*b1cdbd2cSJim Jagielski 59*b1cdbd2cSJim Jagielski 60*b1cdbd2cSJim Jagielski 61*b1cdbd2cSJim Jagielski 62*b1cdbd2cSJim Jagielski /** Setup the GUI. It is divided into three areas. The lower half is 63*b1cdbd2cSJim Jagielski ocupied by a message area that logs all the events received from 64*b1cdbd2cSJim Jagielski accessibility objects. The upper half is shared by two different 65*b1cdbd2cSJim Jagielski displays of the currently focused object. On left there is a textual 66*b1cdbd2cSJim Jagielski representation. On the right there is a graphical view of the 67*b1cdbd2cSJim Jagielski objects's outline. 68*b1cdbd2cSJim Jagielski */ Layout()69*b1cdbd2cSJim Jagielski private void Layout () 70*b1cdbd2cSJim Jagielski { 71*b1cdbd2cSJim Jagielski GridBagConstraints constraints; 72*b1cdbd2cSJim Jagielski 73*b1cdbd2cSJim Jagielski JPanel aPanel = new JPanel (true); 74*b1cdbd2cSJim Jagielski aPanel.setLayout (new GridBagLayout()); 75*b1cdbd2cSJim Jagielski aPanel.setOpaque (true); 76*b1cdbd2cSJim Jagielski 77*b1cdbd2cSJim Jagielski mFrame = new JFrame ("Simple Screen Reader 0.3"); 78*b1cdbd2cSJim Jagielski mFrame.setContentPane(aPanel); 79*b1cdbd2cSJim Jagielski mFrame.setSize (600,400); 80*b1cdbd2cSJim Jagielski 81*b1cdbd2cSJim Jagielski 82*b1cdbd2cSJim Jagielski addComponent (new JLabel ("Focused Object:"), 83*b1cdbd2cSJim Jagielski 0,0, 1,1, 0,0, GridBagConstraints.WEST, GridBagConstraints.NONE); 84*b1cdbd2cSJim Jagielski 85*b1cdbd2cSJim Jagielski 86*b1cdbd2cSJim Jagielski maTextualDisplay = new TextualDisplay (); 87*b1cdbd2cSJim Jagielski addComponent (maTextualDisplay, 88*b1cdbd2cSJim Jagielski 0,1, 1,1, 1,1, GridBagConstraints.CENTER, GridBagConstraints.BOTH); 89*b1cdbd2cSJim Jagielski 90*b1cdbd2cSJim Jagielski maGraphicalDisplay = new GraphicalDisplay (); 91*b1cdbd2cSJim Jagielski addComponent (maGraphicalDisplay, 92*b1cdbd2cSJim Jagielski 1,0, 1,2, 1,1, GridBagConstraints.CENTER, GridBagConstraints.BOTH); 93*b1cdbd2cSJim Jagielski 94*b1cdbd2cSJim Jagielski addComponent (new JLabel ("Messages:"), 95*b1cdbd2cSJim Jagielski 0,2, 1,1, 0,0, GridBagConstraints.WEST, GridBagConstraints.NONE); 96*b1cdbd2cSJim Jagielski 97*b1cdbd2cSJim Jagielski addComponent (MessageArea.Instance(), 98*b1cdbd2cSJim Jagielski 0,3, 2,1, 1,1, GridBagConstraints.CENTER, GridBagConstraints.BOTH); 99*b1cdbd2cSJim Jagielski 100*b1cdbd2cSJim Jagielski 101*b1cdbd2cSJim Jagielski JButton aButton = new JButton ("Quit SSR"); 102*b1cdbd2cSJim Jagielski addComponent (aButton, 103*b1cdbd2cSJim Jagielski 0,4, 1,1, 0,0, GridBagConstraints.WEST,GridBagConstraints.NONE); 104*b1cdbd2cSJim Jagielski aButton.addActionListener (this); 105*b1cdbd2cSJim Jagielski 106*b1cdbd2cSJim Jagielski mFrame.show(); 107*b1cdbd2cSJim Jagielski } 108*b1cdbd2cSJim Jagielski 109*b1cdbd2cSJim Jagielski 110*b1cdbd2cSJim Jagielski 111*b1cdbd2cSJim Jagielski 112*b1cdbd2cSJim Jagielski /** Add a GUI element with the given constraints to the main window. 113*b1cdbd2cSJim Jagielski */ addComponent(JComponent aComponent, int x, int y, int width, int height, double weightx, double weighty, int anchor, int fill)114*b1cdbd2cSJim Jagielski private JComponent addComponent (JComponent aComponent, 115*b1cdbd2cSJim Jagielski int x, int y, int width, int height, double weightx, double weighty, 116*b1cdbd2cSJim Jagielski int anchor, int fill) 117*b1cdbd2cSJim Jagielski { 118*b1cdbd2cSJim Jagielski aComponent.setDoubleBuffered (false); 119*b1cdbd2cSJim Jagielski GridBagConstraints aConstraints = new GridBagConstraints(); 120*b1cdbd2cSJim Jagielski aConstraints.gridx = x; 121*b1cdbd2cSJim Jagielski aConstraints.gridy = y; 122*b1cdbd2cSJim Jagielski aConstraints.gridwidth = width; 123*b1cdbd2cSJim Jagielski aConstraints.gridheight = height; 124*b1cdbd2cSJim Jagielski aConstraints.weightx = weightx; 125*b1cdbd2cSJim Jagielski aConstraints.weighty = weighty; 126*b1cdbd2cSJim Jagielski aConstraints.anchor = anchor; 127*b1cdbd2cSJim Jagielski aConstraints.fill = fill; 128*b1cdbd2cSJim Jagielski 129*b1cdbd2cSJim Jagielski mFrame.getContentPane().add (aComponent, aConstraints); 130*b1cdbd2cSJim Jagielski 131*b1cdbd2cSJim Jagielski return aComponent; 132*b1cdbd2cSJim Jagielski } 133*b1cdbd2cSJim Jagielski 134*b1cdbd2cSJim Jagielski 135*b1cdbd2cSJim Jagielski 136*b1cdbd2cSJim Jagielski 137*b1cdbd2cSJim Jagielski /** This call-back handles button presses. 138*b1cdbd2cSJim Jagielski */ actionPerformed(java.awt.event.ActionEvent e)139*b1cdbd2cSJim Jagielski public void actionPerformed (java.awt.event.ActionEvent e) 140*b1cdbd2cSJim Jagielski { 141*b1cdbd2cSJim Jagielski if (e.getActionCommand().equals ("Quit SSR")) 142*b1cdbd2cSJim Jagielski { 143*b1cdbd2cSJim Jagielski maEventHandler.finalize (); 144*b1cdbd2cSJim Jagielski System.exit(0); 145*b1cdbd2cSJim Jagielski } 146*b1cdbd2cSJim Jagielski } 147*b1cdbd2cSJim Jagielski 148*b1cdbd2cSJim Jagielski 149*b1cdbd2cSJim Jagielski /// The main frame that contains all other GUI elements. 150*b1cdbd2cSJim Jagielski private JFrame mFrame; 151*b1cdbd2cSJim Jagielski 152*b1cdbd2cSJim Jagielski /// A textutal representation of the currently focused object. 153*b1cdbd2cSJim Jagielski private TextualDisplay maTextualDisplay; 154*b1cdbd2cSJim Jagielski 155*b1cdbd2cSJim Jagielski /// A graphical representation of the currently focused object. 156*b1cdbd2cSJim Jagielski private GraphicalDisplay maGraphicalDisplay; 157*b1cdbd2cSJim Jagielski 158*b1cdbd2cSJim Jagielski /// The event handler that reacts to all the accessibility events. 159*b1cdbd2cSJim Jagielski private EventHandler maEventHandler; 160*b1cdbd2cSJim Jagielski } 161