2015/12/7
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 | import greenfoot.*;public class Button extends Actor{ // Variables that are active for the entire Button class private static int songPlaying = 0; // The number (1, 2, ...) of the song playing, or 0 if no song is playing private static GreenfootSound gfs; // The song to play // Instance variables that are active for each instance of a Button private String image; // This button's image private String song; // This button's song name, or blank if the button is not a song private int buttonType; // 1, 2, 3, ... for a song button, -1 for play/pause, -2 for stop private boolean isMouseClicked; // True if the mouse was clicked on this Button instance /** * Button constructor called when a new instance of a Button is created. */ public Button(String imageName, String songName, int typeOfButton) { image = imageName; setImage(image); song = songName; buttonType = typeOfButton; } /** * Act - do whatever the Button wants to do. This method is called whenever * the 'Act' or 'Run' button gets pressed in the environment. */ public void act() { isMouseClicked = Greenfoot.mouseClicked(this); // Keep the mouse clicking status handy checkSongPlaying(); reduceTransparency(); } /** * checkSongPlaying - if a song is playing, see if we stop it. If a song is not playing, see if we start it */ private void checkSongPlaying() { if (isMouseClicked) { getWorld().showText("Button type: " + buttonType + ", song name: '" + song + "'", 250, 320); } if (isMouseClicked && buttonType < 0) { if (songPlaying == 0) { getWorld().showText("Hey! There's nothing playing!", 250, 300); } else { getWorld().showText("Stopping song " + songPlaying, 100, 380); gfs.stop(); songPlaying = 0; } } if (isMouseClicked && songPlaying == 0 && buttonType > 0) { getWorld().showText("Starting song " + buttonType, 100, 380); gfs = new GreenfootSound(song); songPlaying = buttonType; gfs.play(); } } /** * Reduce the transparency of the image of this instance is the song playing */ public void reduceTransparency() { if (songPlaying == buttonType) { // Insert code here to reduce the transparency a bit, or if the lower transparency // limit has been reached, reset transparency to full transparency. // See the Chapter 10 'smoke' scenario in the Smoke class for details on reducing transparency getWorld().showText("Reducing transparency on song " + buttonType, 400, 380); return; } }} |
