1 files changed, 240 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/ui/AlbumSetView.java b/src/com/android/gallery3d/ui/AlbumSetView.java
new file mode 100644
index 000000000..ef066b34c
--- /dev/null
+++ b/src/com/android/gallery3d/ui/AlbumSetView.java
@@ -0,0 +1,240 @@
+/*
+ * Copyright (C) 2010 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.gallery3d.ui;
+
+import com.android.gallery3d.app.GalleryActivity;
+import com.android.gallery3d.common.Utils;
+import com.android.gallery3d.data.MediaItem;
+import com.android.gallery3d.data.MediaSet;
+import com.android.gallery3d.ui.PositionRepository.Position;
+
+import android.graphics.Rect;
+
+import java.util.Random;
+
+public class AlbumSetView extends SlotView {
+    @SuppressWarnings("unused")
+    private static final String TAG = "AlbumSetView";
+    private static final int CACHE_SIZE = 32;
+    private static final float PHOTO_DISTANCE = 35f;
+
+    private int mVisibleStart;
+    private int mVisibleEnd;
+
+    private Random mRandom = new Random();
+    private long mSeed = mRandom.nextLong();
+
+    private AlbumSetSlidingWindow mDataWindow;
+    private final GalleryActivity mActivity;
+    private final int mSlotWidth;
+    private final int mDisplayItemSize;
+    private final int mLabelFontSize;
+    private final int mLabelOffsetY;
+    private final int mLabelMargin;
+
+    private SelectionDrawer mSelectionDrawer;
+
+    public static interface Model {
+        public MediaItem[] getCoverItems(int index);
+        public MediaSet getMediaSet(int index);
+        public int size();
+        public void setActiveWindow(int start, int end);
+        public void setModelListener(ModelListener listener);
+    }
+
+    public static interface ModelListener {
+        public void onWindowContentChanged(int index);
+        public void onSizeChanged(int size);
+    }
+
+    public static class AlbumSetItem {
+        public DisplayItem[] covers;
+        public DisplayItem labelItem;
+        public long setDataVersion;
+    }
+
+    public AlbumSetView(GalleryActivity activity, SelectionDrawer drawer,
+            int slotWidth, int slotHeight, int displayItemSize,
+            int labelFontSize, int labelOffsetY, int labelMargin) {
+        super(activity.getAndroidContext());
+        mActivity = activity;
+        setSelectionDrawer(drawer);
+        setSlotSize(slotWidth, slotHeight);
+        mSlotWidth = slotWidth;
+        mDisplayItemSize = displayItemSize;
+        mLabelFontSize = labelFontSize;
+        mLabelOffsetY = labelOffsetY;
+        mLabelMargin = labelMargin;
+    }
+
+    public void setSelectionDrawer(SelectionDrawer drawer) {
+        mSelectionDrawer = drawer;
+        if (mDataWindow != null) {
+            mDataWindow.setSelectionDrawer(drawer);
+        }
+    }
+
+    public void setModel(AlbumSetView.Model model) {
+        if (mDataWindow != null) {
+            mDataWindow.setListener(null);
+            setSlotCount(0);
+            mDataWindow = null;
+        }
+        if (model != null) {
+            mDataWindow = new AlbumSetSlidingWindow(mActivity,
+                    mSlotWidth - mLabelMargin * 2, mDisplayItemSize, mLabelFontSize,
+                    mSelectionDrawer, model, CACHE_SIZE);
+            mDataWindow.setListener(new MyCacheListener());
+            setSlotCount(mDataWindow.size());
+            updateVisibleRange(getVisibleStart(), getVisibleEnd());
+        }
+    }
+
+    private void putSlotContent(int slotIndex, AlbumSetItem entry) {
+        // Get displayItems from mItemsetMap or create them from MediaSet.
+        Utils.assertTrue(entry != null);
+        Rect rect = getSlotRect(slotIndex);
+
+        DisplayItem[] items = entry.covers;
+        mRandom.setSeed(slotIndex ^ mSeed);
+
+        int x = (rect.left + rect.right) / 2;
+        int y = (rect.top + rect.bottom) / 2;
+
+        Position basePosition = new Position(x, y, 0);
+
+        // Put the cover items in reverse order, so that the first item is on
+        // top of the rest.
+        int labelY = y + mLabelOffsetY - entry.labelItem.getHeight() / 2;
+        Position position = new Position(x, labelY, 0f);
+        putDisplayItem(position, position, entry.labelItem);
+
+        for (int i = 0, n = items.length; i < n; ++i) {
+            DisplayItem item = items[i];
+            float dx = 0;
+            float dy = 0;
+            float dz = 0f;
+            float theta = 0;
+            if (i != 0) {
+                dz = i * PHOTO_DISTANCE;
+            }
+            position = new Position(x + dx, y + dy, dz);
+            position.theta = theta;
+            putDisplayItem(position, basePosition, item);
+        }
+
+    }
+
+    private void freeSlotContent(int index, AlbumSetItem entry) {
+        if (entry == null) return;
+        for (DisplayItem item : entry.covers) {
+            removeDisplayItem(item);
+        }
+        removeDisplayItem(entry.labelItem);
+    }
+
+    public int size() {
+        return mDataWindow.size();
+    }
+
+    @Override
+    public void onLayoutChanged(int width, int height) {
+        updateVisibleRange(0, 0);
+        updateVisibleRange(getVisibleStart(), getVisibleEnd());
+    }
+
+    @Override
+    public void onScrollPositionChanged(int position) {
+        super.onScrollPositionChanged(position);
+        updateVisibleRange(getVisibleStart(), getVisibleEnd());
+    }
+
+    private void updateVisibleRange(int start, int end) {
+        if (start == mVisibleStart && end == mVisibleEnd) {
+            // we need to set the mDataWindow active range in any case.
+            mDataWindow.setActiveWindow(start, end);
+            return;
+        }
+        if (start >= mVisibleEnd || mVisibleStart >= end) {
+            for (int i = mVisibleStart, n = mVisibleEnd; i < n; ++i) {
+                freeSlotContent(i, mDataWindow.get(i));
+            }
+            mDataWindow.setActiveWindow(start, end);
+            for (int i = start; i < end; ++i) {
+                putSlotContent(i, mDataWindow.get(i));
+            }
+        } else {
+            for (int i = mVisibleStart; i < start; ++i) {
+                freeSlotContent(i, mDataWindow.get(i));
+            }
+            for (int i = end, n = mVisibleEnd; i < n; ++i) {
+                freeSlotContent(i, mDataWindow.get(i));
+            }
+            mDataWindow.setActiveWindow(start, end);
+            for (int i = start, n = mVisibleStart; i < n; ++i) {
+                putSlotContent(i, mDataWindow.get(i));
+            }
+            for (int i = mVisibleEnd; i < end; ++i) {
+                putSlotContent(i, mDataWindow.get(i));
+            }
+        }
+        mVisibleStart = start;
+        mVisibleEnd = end;
+
+        invalidate();
+    }
+
+    @Override
+    protected void render(GLCanvas canvas) {
+        mSelectionDrawer.prepareDrawing();
+        super.render(canvas);
+    }
+
+    private class MyCacheListener implements AlbumSetSlidingWindow.Listener {
+
+        public void onSizeChanged(int size) {
+            // If the layout parameters are changed, we need reput all items.
+            if (setSlotCount(size)) updateVisibleRange(0, 0);
+            updateVisibleRange(getVisibleStart(), getVisibleEnd());
+            invalidate();
+        }
+
+        public void onWindowContentChanged(int slot, AlbumSetItem old, AlbumSetItem update) {
+            freeSlotContent(slot, old);
+            putSlotContent(slot, update);
+            invalidate();
+        }
+
+        public void onContentInvalidated() {
+            invalidate();
+        }
+    }
+
+    public void pause() {
+        for (int i = mVisibleStart, n = mVisibleEnd; i < n; ++i) {
+            freeSlotContent(i, mDataWindow.get(i));
+        }
+        mDataWindow.pause();
+    }
+
+    public void resume() {
+        mDataWindow.resume();
+        for (int i = mVisibleStart, n = mVisibleEnd; i < n; ++i) {
+            putSlotContent(i, mDataWindow.get(i));
+        }
+    }
+}