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      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.launcher3;
     18 
     19 import android.content.Context;
     20 import android.graphics.Bitmap;
     21 import android.graphics.Canvas;
     22 import android.graphics.Region;
     23 import android.graphics.drawable.Drawable;
     24 import android.util.AttributeSet;
     25 import android.util.TypedValue;
     26 import android.widget.TextView;
     27 
     28 /**
     29  * An icon on a PagedView, specifically for items in the launcher's paged view (with compound
     30  * drawables on the top).
     31  */
     32 public class PagedViewIcon extends TextView {
     33     /** A simple callback interface to allow a PagedViewIcon to notify when it has been pressed */
     34     public static interface PressedCallback {
     35         void iconPressed(PagedViewIcon icon);
     36     }
     37 
     38     @SuppressWarnings("unused")
     39     private static final String TAG = "PagedViewIcon";
     40     private static final float PRESS_ALPHA = 0.4f;
     41 
     42     private PagedViewIcon.PressedCallback mPressedCallback;
     43     private boolean mLockDrawableState = false;
     44 
     45     private Bitmap mIcon;
     46 
     47     public PagedViewIcon(Context context) {
     48         this(context, null);
     49     }
     50 
     51     public PagedViewIcon(Context context, AttributeSet attrs) {
     52         this(context, attrs, 0);
     53     }
     54 
     55     public PagedViewIcon(Context context, AttributeSet attrs, int defStyle) {
     56         super(context, attrs, defStyle);
     57     }
     58 
     59     public void onFinishInflate() {
     60         super.onFinishInflate();
     61 
     62         // Ensure we are using the right text size
     63         LauncherAppState app = LauncherAppState.getInstance();
     64         DeviceProfile grid = app.getDynamicGrid().getDeviceProfile();
     65         setTextSize(TypedValue.COMPLEX_UNIT_PX, grid.allAppsIconTextSizePx);
     66     }
     67 
     68     public void applyFromApplicationInfo(AppInfo info, boolean scaleUp,
     69             PagedViewIcon.PressedCallback cb) {
     70         LauncherAppState app = LauncherAppState.getInstance();
     71         DeviceProfile grid = app.getDynamicGrid().getDeviceProfile();
     72 
     73         mIcon = info.iconBitmap;
     74         mPressedCallback = cb;
     75         Drawable icon = Utilities.createIconDrawable(mIcon);
     76         icon.setBounds(0, 0, grid.allAppsIconSizePx, grid.allAppsIconSizePx);
     77         setCompoundDrawables(null, icon, null, null);
     78         setCompoundDrawablePadding(grid.iconDrawablePaddingPx);
     79         setText(info.title);
     80         setTag(info);
     81     }
     82 
     83     public void lockDrawableState() {
     84         mLockDrawableState = true;
     85     }
     86 
     87     public void resetDrawableState() {
     88         mLockDrawableState = false;
     89         post(new Runnable() {
     90             @Override
     91             public void run() {
     92                 refreshDrawableState();
     93             }
     94         });
     95     }
     96 
     97     protected void drawableStateChanged() {
     98         super.drawableStateChanged();
     99 
    100         // We keep in the pressed state until resetDrawableState() is called to reset the press
    101         // feedback
    102         if (isPressed()) {
    103             setAlpha(PRESS_ALPHA);
    104             if (mPressedCallback != null) {
    105                 mPressedCallback.iconPressed(this);
    106             }
    107         } else if (!mLockDrawableState) {
    108             setAlpha(1f);
    109         }
    110     }
    111 
    112     @Override
    113     public void draw(Canvas canvas) {
    114         // If text is transparent, don't draw any shadow
    115         if (getCurrentTextColor() == getResources().getColor(android.R.color.transparent)) {
    116             getPaint().clearShadowLayer();
    117             super.draw(canvas);
    118             return;
    119         }
    120 
    121         // We enhance the shadow by drawing the shadow twice
    122         getPaint().setShadowLayer(BubbleTextView.SHADOW_LARGE_RADIUS, 0.0f,
    123                 BubbleTextView.SHADOW_Y_OFFSET, BubbleTextView.SHADOW_LARGE_COLOUR);
    124         super.draw(canvas);
    125         canvas.save(Canvas.CLIP_SAVE_FLAG);
    126         canvas.clipRect(getScrollX(), getScrollY() + getExtendedPaddingTop(),
    127                 getScrollX() + getWidth(),
    128                 getScrollY() + getHeight(), Region.Op.INTERSECT);
    129         getPaint().setShadowLayer(BubbleTextView.SHADOW_SMALL_RADIUS, 0.0f, 0.0f,
    130                 BubbleTextView.SHADOW_SMALL_COLOUR);
    131         super.draw(canvas);
    132         canvas.restore();
    133     }
    134 }
    135