1532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang/* 2532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang * Copyright (C) 2011 The Android Open Source Project 3532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang * 4532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang * Licensed under the Apache License, Version 2.0 (the "License"); 5532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang * you may not use this file except in compliance with the License. 6532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang * You may obtain a copy of the License at 7532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang * 8532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang * http://www.apache.org/licenses/LICENSE-2.0 9532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang * 10532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang * Unless required by applicable law or agreed to in writing, software 11532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang * distributed under the License is distributed on an "AS IS" BASIS, 12532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang * See the License for the specific language governing permissions and 14532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang * limitations under the License. 15532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang */ 16532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang 17532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Changpackage com.android.gallery3d.ui; 18532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang 19532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Changimport android.content.Context; 20532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Changimport android.opengl.Matrix; 21532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang 22532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang// EdgeView draws EdgeEffect (blue glow) at four sides of the view. 23532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Changpublic class EdgeView extends GLView { 247817979db0c52ffeacb951625b1e821eba303285Ahbong Chang @SuppressWarnings("unused") 25532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang private static final String TAG = "EdgeView"; 26532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang 27b7ec5534c7b539be2397c27cfa5e8b992974c12dChih-Chung Chang public static final int INVALID_DIRECTION = -1; 28532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang public static final int TOP = 0; 29532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang public static final int LEFT = 1; 30532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang public static final int BOTTOM = 2; 31532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang public static final int RIGHT = 3; 32532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang 33532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang // Each edge effect has a transform matrix, and each matrix has 16 elements. 34532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang // We put all the elements in one array. These constants specify the 35532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang // starting index of each matrix. 36532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang private static final int TOP_M = TOP * 16; 37532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang private static final int LEFT_M = LEFT * 16; 38532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang private static final int BOTTOM_M = BOTTOM * 16; 39532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang private static final int RIGHT_M = RIGHT * 16; 40532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang 41532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang private EdgeEffect[] mEffect = new EdgeEffect[4]; 42532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang private float[] mMatrix = new float[4 * 16]; 43532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang 44532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang public EdgeView(Context context) { 45532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang for (int i = 0; i < 4; i++) { 46532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang mEffect[i] = new EdgeEffect(context); 47532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang } 48532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang } 49532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang 50532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang @Override 51532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang protected void onLayout( 52532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang boolean changeSize, int left, int top, int right, int bottom) { 53532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang if (!changeSize) return; 54532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang 55532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang int w = right - left; 56532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang int h = bottom - top; 57532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang for (int i = 0; i < 4; i++) { 58532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang if ((i & 1) == 0) { // top or bottom 59532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang mEffect[i].setSize(w, h); 60532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang } else { // left or right 61532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang mEffect[i].setSize(h, w); 62532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang } 63532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang } 64532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang 65532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang // Set up transforms for the four edges. Without transforms an 66532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang // EdgeEffect draws the TOP edge from (0, 0) to (w, Y * h) where Y 67532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang // is some factor < 1. For other edges we need to move, rotate, and 68532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang // flip the effects into proper places. 69532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang Matrix.setIdentityM(mMatrix, TOP_M); 70532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang Matrix.setIdentityM(mMatrix, LEFT_M); 71532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang Matrix.setIdentityM(mMatrix, BOTTOM_M); 72532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang Matrix.setIdentityM(mMatrix, RIGHT_M); 73532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang 74532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang Matrix.rotateM(mMatrix, LEFT_M, 90, 0, 0, 1); 75532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang Matrix.scaleM(mMatrix, LEFT_M, 1, -1, 1); 76532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang 77532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang Matrix.translateM(mMatrix, BOTTOM_M, 0, h, 0); 78532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang Matrix.scaleM(mMatrix, BOTTOM_M, 1, -1, 1); 79532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang 80532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang Matrix.translateM(mMatrix, RIGHT_M, w, 0, 0); 81532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang Matrix.rotateM(mMatrix, RIGHT_M, 90, 0, 0, 1); 82532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang } 83532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang 84532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang @Override 85532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang protected void render(GLCanvas canvas) { 86532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang super.render(canvas); 87532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang boolean more = false; 88532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang for (int i = 0; i < 4; i++) { 89532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang canvas.save(GLCanvas.SAVE_FLAG_MATRIX); 90532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang canvas.multiplyMatrix(mMatrix, i * 16); 91532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang more |= mEffect[i].draw(canvas); 92532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang canvas.restore(); 93532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang } 94532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang if (more) { 95532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang invalidate(); 96532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang } 97532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang } 98532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang 99532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang // Called when the content is pulled away from the edge. 100532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang // offset is in pixels. direction is one of {TOP, LEFT, BOTTOM, RIGHT}. 101532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang public void onPull(int offset, int direction) { 102532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang int fullLength = ((direction & 1) == 0) ? getWidth() : getHeight(); 103532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang mEffect[direction].onPull((float)offset / fullLength); 104532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang if (!mEffect[direction].isFinished()) { 105532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang invalidate(); 106532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang } 107532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang } 108532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang 109532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang // Call when the object is released after being pulled. 110532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang public void onRelease() { 111532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang boolean more = false; 112532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang for (int i = 0; i < 4; i++) { 113532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang mEffect[i].onRelease(); 114532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang more |= !mEffect[i].isFinished(); 115532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang } 116532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang if (more) { 117532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang invalidate(); 118532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang } 119532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang } 120532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang 121532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang // Call when the effect absorbs an impact at the given velocity. 122532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang // Used when a fling reaches the scroll boundary. velocity is in pixels 123532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang // per second. direction is one of {TOP, LEFT, BOTTOM, RIGHT}. 124532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang public void onAbsorb(int velocity, int direction) { 125532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang mEffect[direction].onAbsorb(velocity); 126532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang if (!mEffect[direction].isFinished()) { 127532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang invalidate(); 128532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang } 129532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang } 130532d93caddc91a7aa33ca113adbc0b8255d498ebChih-Chung Chang} 131