菜单滑动效果的实现
öffentliche Klasse MenuScrollerActivity erweitert BaseGameActivity implementiert IScrollDetectorListener, IOnSceneTouchListener, IClickDetectorListener { // =================================== ======================= // Konstanten // =============================================== ========= protected static int CAMERA_WIDTH = 480; protected static int CAMERA_HEIGHT = 320; protected static int FONT_SIZE = 24; protected static int PADDING = 50; protected static int MENUITEMS = 7; // ============================================= =========== // Felder // =============================================== ========= private Szene mScene; private Kamera mCamera; private Schriftart mFont; private BitmapTextureAtlas mFontTexture; private BitmapTextureAtlas mMenuTextureAtlas; private TextureRegion mMenuLeftTextureRegion; private TextureRegion mMenuRightTextureRegion; privates Sprite-Menü links; privates Sprite-Menürechts; // Scrollen private SurfaceScrollDetector mScrollDetector; privater ClickDetector mClickDetector; privater Float mMinX = 0; privater Float mMaxX = 0; privater Float mCurrentX = 0; private int iItemClicked = -1; privates Rechteck scrollBar; private List<TextureRegion> columns = new ArrayList<TextureRegion>(); // ============================================= =========== // Konstruktoren // =============================================== ========= // =============================================== ========= // Getter & Setter // =============================================== ========= // =============================================== ========= // Methoden für/von SuperClass/Interfaces // =============================================== ========= @Override public void onLoadResources() { // Pfade FontFactory.setAssetBasePath("font/"); BitmapTextureAtlasTextureRegionFactory.setAssetBasePath("gfx/"); // Schriftart this.mFontTexture = new BitmapTextureAtlas(256, 256); this.mFont = FontFactory.createFromAsset(this.mFontTexture, this, "Plok.TTF", FONT_SIZE, true, Color.BLACK); this.mEngine.getTextureManager().loadTextures(this.mFontTexture); this.mEngine.getFontManager().loadFonts(this.mFont); //Bilder für das Menü for (int i = 0; i < MENUITEMS; i++) { BitmapTextureAtlas mMenuBitmapTextureAtlas = new BitmapTextureAtlas(256,256, TextureOptions.BILINEAR_PREMULTIPLYALPHA); TextureRegion mMenuTextureRegion = BitmapTextureAtlasTextureRegionFactory.createFromAsset(mMenuBitmapTextureAtlas, this, "menu"+i+".png", 0, 0); this.mEngine.getTextureManager().loadTexture(mMenuBitmapTextureAtlas); columns.add(mMenuTextureRegion); } //Texturen für Menüpfeile this.mMenuTextureAtlas = new BitmapTextureAtlas(128,128, TextureOptions.BILINEAR_PREMULTIPLYALPHA); this.mMenuLeftTextureRegion = BitmapTextureAtlasTextureRegionFactory.createFromAsset(mMenuTextureAtlas, this, "menu_left.png", 0, 0); this.mMenuRightTextureRegion = BitmapTextureAtlasTextureRegionFactory.createFromAsset(mMenuTextureAtlas, this, "menu_right.png",64, 0); this.mEngine.getTextureManager().loadTexture(mMenuTextureAtlas); } @Override public Engine onLoadEngine() { this.mCamera = new Camera(0, 0, CAMERA_WIDTH, CAMERA_HEIGHT); final EngineOptions engineOptions = new EngineOptions(true, ScreenOrientation.LANDSCAPE, new FillResolutionPolicy(), this.mCamera); engineOptions.getTouchOptions().setRunOnUpdateThread(true); final Engine engine = new Engine(engineOptions); Rücklaufmotor; } @Override public Scene onLoadScene() { this.mEngine.registerUpdateHandler(new FPSLogger()); this.mScene = new Scene(); this.mScene.setBackground(new ColorBackground(0, 0, 0)); this.mScrollDetector = new SurfaceScrollDetector(this); this.mClickDetector = new ClickDetector(this); this.mScene.setOnSceneTouchListener(this); this.mScene.setTouchAreaBindingEnabled(true); this.mScene.setOnSceneTouchListenerBindingEnabled(true); CreateMenuBoxes(); return this.mScene; } @Override public boolean onSceneTouchEvent(final Scene pScene, final TouchEvent pSceneTouchEvent) { this.mClickDetector.onTouchEvent(pSceneTouchEvent); this.mScrollDetector.onTouchEvent(pSceneTouchEvent); return true; } @Override public void onScroll(final ScrollDetector pScollDetector, final TouchEvent pTouchEvent, final float pDistanceX, final float pDistanceY) { //Deaktivieren Sie die Menüpfeile links und rechts (15px-Padding) if(mCamera.getMinX()<=15) menuleft. setVisible(false); sonst menuleft.setVisible(true); if(mCamera.getMinX()>mMaxX-15) menuright.setVisible(false); sonst menuright.setVisible(true); //Zurückgeben, wenn Enden erreicht sind if ( ((mCurrentX - pDistanceX) < mMinX) ){ return; }else if((mCurrentX - pDistanceX) > mMaxX){ return; } //Kamera auf den aktuellen Punkt zentrieren this.mCamera.offsetCenter(-pDistanceX,0 ); mCurrentX -= pDistanceX; //Setzen Sie die Bildlaufleiste mit dem Kamera-Float tempX =mCamera.getCenterX()-CAMERA_WIDTH/2; // den %-Teil zur Position hinzufügen tempX+= (tempX/(mMaxX+CAMERA_WIDTH))*CAMERA_WIDTH; //Position festlegen scrollBar.setPosition(tempX, scrollBar.getY()); //Setze die Pfeile für links und rechts menuright.setPosition(mCamera.getCenterX()+CAMERA_WIDTH/2-menuright.getWidth(),menuright.getY()); menuleft.setPosition(mCamera.getCenterX()-CAMERA_WIDTH/2,menuleft.getY()); //Da die Kamera negative X-Werte haben kann, also auf 0 setzen if(this.mCamera.getMinX()<0){ this.mCamera.offsetCenter(0,0 ); mCurrentX=0; } } @Override public void onClick(ClickDetector pClickDetector, TouchEvent pTouchEvent) { loadLevel(iItemClicked); }; // ============================================= =========== // Methoden // =============================================== ========= private void CreateMenuBoxes() { int spriteX = PADDING; int spriteY = PADDING; //aktueller Artikelzähler int iItem = 1; for (int x = 0; x < columns.size(); x++) { //Speichern Sie beim Berühren das angeklickte Element, falls es sich um einen Klick und nicht um einen Bildlauf handelt. final int itemToLoad = iItem; Sprite sprite = new Sprite(spriteX,spriteY,columns.get(x)){ public boolean onAreaTouched(final TouchEvent pSceneTouchEvent, final float pTouchAreaLocalX, final float pTouchAreaLocalY) { iItemClicked = itemToLoad; return false; } }; iItem++; this.mScene.attachChild(sprite); this.mScene.registerTouchArea(sprite); spriteX += 20 + PADDING+sprite.getWidth(); } mMaxX = spriteX - CAMERA_WIDTH; //Größe der Bildlaufleiste festlegen float scrollbarsize = CAMERA_WIDTH/((mMaxX+CAMERA_WIDTH)/CAMERA_WIDTH); scrollBar = neues Rechteck(0,CAMERA_HEIGHT-20,scrollbarsize, 20); scrollBar.setColor(1,0,0); this.mScene.attachChild(scrollBar); menuleft = new Sprite(0,CAMERA_HEIGHT/2-mMenuLeftTextureRegion.getHeight()/2,mMenuLeftTextureRegion); menuright = new Sprite(CAMERA_WIDTH-mMenuRightTextureRegion.getWidth(),CAMERA_HEIGHT/2-mMenuRightTextureRegion.getHeight()/2,mMenuRightTextureRegion); this.mScene.attachChild(menuright); menuleft.setVisible(false); this.mScene.attachChild(menuleft); } @Override public void onLoadComplete() { } //Hier rufen Sie das Laden des Elements auf. private void loadLevel(final int iLevel) { if (iLevel != -1) { runOnUiThread(new Runnable() { @Override public void run() { Toast.makeText(MenuScrollerActivity.this, "Load Item" + String.valueOf( iLevel), Toast.LENGTH_SHORT).show(); iItemClicked = -1 } }); } }}以上所述就是本文的全部内容了, 希望大家能够喜欢.