1 /*** 2 * Redistribution and use in source and binary forms, with or without 3 * modification, are permitted provided that the following conditions are 4 * met : 5 * 6 * . Redistributions of source code must retain the above copyright 7 * notice, this list of conditions and the following disclaimer. 8 * 9 * . Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * . The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 25 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $Id$ 29 */ 30 31 package palmed.ui; 32 33 import javax.microedition.lcdui.Graphics; 34 35 /*** 36 * This interface defines a gui component. 37 * 38 * @author Mathieu Champlon 39 * @version $Revision$ $Date$ 40 */ 41 public interface IComponent 42 { 43 /*** 44 * Paint the component. 45 * 46 * @param g the graphics 47 */ 48 void paint( Graphics g ); 49 50 /*** 51 * Request a component resize. 52 * 53 * @param width the new width 54 * @param height the new height 55 */ 56 void resize( int width, int height ); 57 58 /*** 59 * Retrieve the layout. 60 * <p> 61 * Supported layouts are : 62 * <ul> 63 * <li>Item.LAYOUT_DEFAULT 64 * <li>Item.LAYOUT_EXPAND 65 * <li>Item.LAYOUT_VEXPAND 66 * </ul> 67 * 68 * @return a combination of layout flags 69 */ 70 int getLayout(); 71 72 /*** 73 * Retrieve the current width. 74 * 75 * @return the width in pixels 76 */ 77 int getWidth(); 78 79 /*** 80 * Retrieve the current height. 81 * 82 * @return the height in pixels 83 */ 84 int getHeight(); 85 86 /*** 87 * Handle a click event. 88 * 89 * @param x the pointer abscissa 90 * @param y the pointer ordinate 91 * @return whether the component claims focus or not 92 */ 93 boolean click( int x, int y ); 94 95 /*** 96 * Handle a drag event. 97 * <p> 98 * The component must have claimed focus upon click in order to receive this event. 99 * 100 * @param x the pointer abscissa 101 * @param y the pointer ordinate 102 */ 103 void drag( int x, int y ); 104 105 /*** 106 * Handle an unclick event. 107 * <p> 108 * The component must have claimed focus upon click ini order to receive this event. 109 * 110 * @param x the pointer abscissa 111 * @param y the pointer ordinate 112 */ 113 void unclick( int x, int y ); 114 }