libgdx学习记录23——图片移动选择
模拟移动选择图片，采用相机实现。
1 package com.fxb.newtest; 2 3 import com.badlogic.gdx.ApplicationAdapter; 4 import com.badlogic.gdx.Gdx; 5 import com.badlogic.gdx.graphics.Color; 6 import com.badlogic.gdx.graphics.GL10; 7 import com.badlogic.gdx.graphics.Texture; 8 import com.badlogic.gdx.graphics.glutils.ShapeRenderer; 9 import com.badlogic.gdx.graphics.glutils.ShapeRenderer.ShapeType; 10 import com.badlogic.gdx.input.GestureDetector; 11 import com.badlogic.gdx.input.GestureDetector.GestureAdapter; 12 import com.badlogic.gdx.scenes.scene2d.Action; 13 import com.badlogic.gdx.scenes.scene2d.Stage; 14 import com.badlogic.gdx.scenes.scene2d.actions.Actions; 15 import com.badlogic.gdx.scenes.scene2d.ui.Image; 16 17 public class Lib025_PicChange extends ApplicationAdapter{ 18 19 GestureAdapter gestureAdapter = new GestureAdapter(){ 20 @Override 21 public boolean fling(float velocityX, float velocityY, int button) { 22 // TODO Auto-generated method stub 23 /* if( velocityX > 0 ){ 24 System.out.println( "fling right" ); 25 stage.getCamera().translate( -stage.getWidth(), 0, 0 ); 26 } 27 else{ 28 System.out.println( "fling left" ); 29 stage.getCamera().translate( stage.getWidth(), 0, 0 ); 30 }*/ 31 32 return super.fling(velocityX, velocityY, button); 33 } 34 35 36 37 @Override 38 public boolean pan(float x, float y, float deltaX, float deltaY) { 39 // TODO Auto-generated method stub 40 System.out.println( "pan" ); 41 if( index>0 && deltaX>0 || index<imgs.length-1 && deltaX<0 ){ 42 stage.getCamera().translate( -deltaX, 0, 0 ); 43 add = deltaX > 0? -1: 1; 44 } 45 46 return super.pan(x, y, deltaX, deltaY); 47 } 48 49 50 51 @Override 52 public boolean panStop(float x, float y, int pointer, int button) { 53 // TODO Auto-generated method stub 54 System.out.println( "pan stop" ); 55 if( index>0 && add==-1 || index<imgs.length-1 && add==1 ){ 56 index += add; 57 stage.getCamera().position.set( index*500+stage.getWidth()/2, stage.getHeight()/2, 0 ); 58 } 59 return super.panStop(x, y, pointer, button); 60 } 61 62 63 64 65 }; 66 GestureDetector detector = new GestureDetector( gestureAdapter ); 67 68 Stage stage; 69 Image img1, img2, img3, img4; 70 Image[] imgs; 71 int index; 72 int add = 0; 73 ShapeRenderer rend; 74 75 @Override 76 public void create() { 77 // TODO Auto-generated method stub 78 super.create(); 79 Gdx.input.setInputProcessor( detector ); 80 81 img1 = new Image( new Texture( Gdx.files.internal( "data/pal4_0.jpg" ) ) ); 82 img2 = new Image( new Texture( Gdx.files.internal( "data/pal4_1.jpg" ) ) ); 83 img3 = new Image( new Texture( Gdx.files.internal( "data/pal4_2.jpg" ) ) ); 84 img4 = new Image( new Texture( Gdx.files.internal( "data/pal4_3.jpg" ) ) ); 85 86 stage = new Stage(); 87 stage.addActor( img1 ); 88 stage.addActor( img2 ); 89 stage.addActor( img3 ); 90 stage.addActor( img4 ); 91 92 imgs = new Image[]{ img1, img2, img3, img4 }; 93 94 for( int i=0; i<imgs.length; ++i ){ 95 imgs[i].setSize( 400, 240 ); 96 imgs[i].setPosition( i*500 + stage.getWidth()/2-imgs[i].getWidth()/2, stage.getHeight()/2-imgs[i].getHeight()/2 ); 97 } 98 99 //imgs[1].setVisible( false ); 100 //imgs[2].setVisible( false ); 101 index = 0; 102 rend = new ShapeRenderer(); 103 } 104 105 @Override 106 public void render() { 107 // TODO Auto-generated method stub 108 super.render(); 109 Gdx.gl.glClearColor( 1, 1, 1, 1 ); 110 Gdx.gl.glClear( GL10.GL_COLOR_BUFFER_BIT ); 111 stage.act(); 112 stage.draw(); 113 114 rend.begin( ShapeType.Filled ); 115 rend.setColor( Color.LIGHT_GRAY ); 116 rend.rect( 0, 0, 100, 480 ); 117 rend.rect( 700, 0, 100, 480 ); 118 rend.rect( 100, 0, 700, 60 ); 119 rend.rect( 100, 420, 700, 60 ); 120 rend.end(); 121 122 } 123 124 @Override 125 public void dispose() { 126 // TODO Auto-generated method stub 127 rend.dispose(); 128 stage.dispose(); 129 super.dispose(); 130 } 131 132 }
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