1 files changed, 136 insertions, 0 deletions
diff --git a/src/com/android/launcher2/WallpaperView.java b/src/com/android/launcher2/WallpaperView.java
new file mode 100644
index 000000000..d9fb66a62
--- /dev/null
+++ b/src/com/android/launcher2/WallpaperView.java
@@ -0,0 +1,136 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher2;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.ComponentName;
+import android.content.res.TypedArray;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.RectF;
+import android.graphics.Rect;
+import android.graphics.Region;
+import android.graphics.drawable.Drawable;
+import android.util.AttributeSet;
+import android.view.MotionEvent;
+import android.view.VelocityTracker;
+import android.view.View;
+import android.view.ViewConfiguration;
+import android.view.ViewGroup;
+import android.view.ViewParent;
+import android.widget.Scroller;
+import android.widget.TextView;
+import android.os.Parcelable;
+import android.os.Parcel;
+
+import java.util.ArrayList;
+
+/**
+ * Wallpaper view shows the wallpaper bitmap, which is far layer in the parallax.
+ */
+public class WallpaperView extends View {
+
+    private int mScreenCount;
+
+    private Paint mPaint;
+    private Bitmap mWallpaper;
+
+    private int mWallpaperWidth;
+    private int mWallpaperHeight;
+    private float mWallpaperOffset;
+    private boolean mWallpaperLoaded;
+
+    /**
+     * Used to inflate the Workspace from XML.
+     *
+     * @param context The application's context.
+     * @param attrs The attribtues set containing the Workspace's customization values.
+     */
+    public WallpaperView(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    /**
+     * Used to inflate the Workspace from XML.
+     *
+     * @param context The application's context.
+     * @param attrs The attribtues set containing the Workspace's customization values.
+     * @param defStyle Unused.
+     */
+    public WallpaperView(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+
+        initWorkspace();
+    }
+
+    /**
+     * Initializes various states for this workspace.
+     */
+    private void initWorkspace() {
+        mPaint = new Paint();
+        mPaint.setDither(false);
+    }
+
+    /**
+     * Set the background's wallpaper.
+     */
+    void loadWallpaper(Bitmap bitmap) {
+        mWallpaper = bitmap;
+        mWallpaperLoaded = true;
+        requestLayout();
+        invalidate();
+    }
+
+    void setScreenCount(int count) {
+        mScreenCount = count;
+    }
+
+    @Override
+    public boolean isOpaque() {
+        return !mWallpaper.hasAlpha();
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        boolean restore = false;
+
+        float x = mScrollX * mWallpaperOffset;
+        if (x + mWallpaperWidth < mRight - mLeft) {
+            x = mRight - mLeft - mWallpaperWidth;
+        }
+
+        canvas.drawBitmap(mWallpaper, x, (mBottom - mTop - mWallpaperHeight) / 2, mPaint);
+    }
+
+    @Override
+    protected void onSizeChanged(int width, int height, int oldw, int oldh) {
+        
+        if (mWallpaperLoaded) {
+            mWallpaperLoaded = false;
+            mWallpaper = Utilities.centerToFit(mWallpaper, width, height, getContext());
+            mWallpaperWidth = mWallpaper.getWidth();
+            mWallpaperHeight = mWallpaper.getHeight();
+        }
+
+        final int wallpaperWidth = mWallpaperWidth;
+        mWallpaperOffset = wallpaperWidth > width ? (mScreenCount * width - wallpaperWidth) /
+                ((mScreenCount - 1) * (float) width) : 1.0f;
+    }
+}
+