Home | History | Annotate | Download | only in ui 
      1 /*
      2  * Copyright (C) 2010 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.camera.ui;
     18 
     19 import android.graphics.Matrix;
     20 import android.view.MotionEvent;
     21 
     22 import javax.microedition.khronos.opengles.GL11;
     23 
     24 
     25 class RotatePane extends GLView {
     26 
     27     public static final int UP = 0;
     28     public static final int RIGHT = 1;
     29     public static final int DOWN = 2;
     30     public static final int LEFT = 3;
     31 
     32     private int mOrientation = 0;
     33 
     34     private GLView mChild;
     35 
     36     @Override
     37     protected void onLayout(
     38             boolean change, int left, int top, int right, int bottom) {
     39         int width = right - left;
     40         int height = bottom - top;
     41         switch (mOrientation) {
     42             case UP:
     43             case DOWN:
     44                 mChild.layout(0, 0, width, height);
     45                 break;
     46             case LEFT:
     47             case RIGHT:
     48                 mChild.layout(0, 0, height, width);
     49                 break;
     50         }
     51     }
     52 
     53     @Override
     54     protected void onMeasure(int widthSpec, int heightSpec) {
     55         GLView c = mChild;
     56         switch(mOrientation) {
     57             case UP:
     58             case DOWN:
     59                 c.measure(widthSpec, heightSpec);
     60                 setMeasuredSize(c.getMeasuredWidth(), c.getMeasuredHeight());
     61                 break;
     62             case LEFT:
     63             case RIGHT:
     64                 mChild.measure(heightSpec, widthSpec);
     65                 setMeasuredSize(c.getMeasuredHeight(), c.getMeasuredWidth());
     66         }
     67     }
     68 
     69     @Override
     70     protected void render(GLRootView view, GL11 gl) {
     71 
     72         if (mOrientation == UP) {
     73             mChild.render(view, gl);
     74             return;
     75         }
     76 
     77         view.pushTransform();
     78         Matrix matrix = view.getTransformation().getMatrix();
     79         float width = getWidth();
     80         float height = getHeight();
     81         switch (mOrientation) {
     82             case DOWN:
     83                 matrix.preRotate(180, width / 2, height / 2);
     84                 break;
     85             case LEFT:
     86                 matrix.preRotate(270, height / 2, height / 2);
     87                 break;
     88             case RIGHT:
     89                 matrix.preRotate(90, width / 2, width / 2);
     90                 break;
     91         }
     92         mChild.render(view, gl);
     93         view.popTransform();
     94     }
     95 
     96     @Override
     97     protected boolean dispatchTouchEvent(MotionEvent event) {
     98         float x = event.getX();
     99         float y = event.getY();
    100         float width = getWidth();
    101         float height = getHeight();
    102         switch (mOrientation) {
    103             case DOWN: event.setLocation(width - x, height - y); break;
    104             case LEFT: event.setLocation(height - y, x); break;
    105             case RIGHT: event.setLocation(y, width - x); break;
    106         }
    107         boolean result = mChild.dispatchTouchEvent(event);
    108         event.setLocation(x, y);
    109         return result;
    110     }
    111 
    112     public void setOrientation(int orientation) {
    113         if (mOrientation == orientation) return;
    114         mOrientation = orientation;
    115         requestLayout();
    116     }
    117 
    118     public void setContent(GLView view) {
    119         if (mChild == view) return;
    120 
    121         if (mChild != null) super.clearComponents();
    122         mChild = view;
    123         if (view != null) super.addComponent(view);
    124         requestLayout();
    125     }
    126 
    127     @Override
    128     public void addComponent(GLView view) {
    129         throw new UnsupportedOperationException("use setContent(GLView)");
    130     }
    131 
    132     @Override
    133     public void clearComponents() {
    134         throw new UnsupportedOperationException("use setContent(null)");
    135     }
    136 }
    137