Initial checkin of AOSP Messaging app.

b/23110861

Change-Id: I9aa980d7569247d6b2ca78f5dcb4502e1eaadb8a

src/com/android/messaging/ui/attachmentchooser/AttachmentGridItemView.java

@@ -0,0 +1,119 @@
+/*
+ * Copyright (C) 2015 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.messaging.ui.attachmentchooser;
+
+import android.content.Context;
+import android.graphics.Rect;
+import android.util.AttributeSet;
+import android.view.LayoutInflater;
+import android.view.TouchDelegate;
+import android.view.View;
+import android.widget.CheckBox;
+import android.widget.FrameLayout;
+
+import com.android.messaging.R;
+import com.android.messaging.datamodel.data.MessagePartData;
+import com.android.messaging.ui.AttachmentPreviewFactory;
+import com.android.messaging.util.Assert;
+import com.google.common.annotations.VisibleForTesting;
+
+/**
+ * Shows an item in the attachment picker grid.
+ */
+public class AttachmentGridItemView extends FrameLayout {
+    public interface HostInterface {
+        boolean isItemSelected(MessagePartData attachment);
+        void onItemCheckedChanged(AttachmentGridItemView view, MessagePartData attachment);
+        void onItemClicked(AttachmentGridItemView view, MessagePartData attachment);
+    }
+
+    @VisibleForTesting
+    MessagePartData mAttachmentData;
+    private FrameLayout mAttachmentViewContainer;
+    private CheckBox mCheckBox;
+    private HostInterface mHostInterface;
+
+    public AttachmentGridItemView(final Context context, final AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        super.onFinishInflate();
+        mAttachmentViewContainer = (FrameLayout) findViewById(R.id.attachment_container);
+        mCheckBox = (CheckBox) findViewById(R.id.checkbox);
+        mCheckBox.setOnClickListener(new OnClickListener() {
+            @Override
+            public void onClick(final View v) {
+                mHostInterface.onItemCheckedChanged(AttachmentGridItemView.this, mAttachmentData);
+            }
+        });
+        setOnClickListener(new OnClickListener() {
+            @Override
+            public void onClick(final View v) {
+                mHostInterface.onItemClicked(AttachmentGridItemView.this, mAttachmentData);
+            }
+        });
+        addOnLayoutChangeListener(new OnLayoutChangeListener() {
+            @Override
+            public void onLayoutChange(View v, int left, int top, int right, int bottom,
+                    int oldLeft, int oldTop, int oldRight, int oldBottom) {
+                // Enlarge the clickable region for the checkbox.
+                final int touchAreaIncrease = getResources().getDimensionPixelOffset(
+                        R.dimen.attachment_grid_checkbox_area_increase);
+                final Rect region = new Rect();
+                mCheckBox.getHitRect(region);
+                region.inset(-touchAreaIncrease, -touchAreaIncrease);
+                setTouchDelegate(new TouchDelegate(region, mCheckBox));
+            }
+        });
+    }
+
+    @Override
+    protected void onMeasure(final int widthMeasureSpec, final int heightMeasureSpec) {
+        // The grid view auto-fits the columns, so we want to let the height match the width
+        // to make the attachment preview square.
+        super.onMeasure(widthMeasureSpec, widthMeasureSpec);
+    }
+
+    public void bind(final MessagePartData attachment, final HostInterface hostInterface) {
+        Assert.isTrue(attachment.isAttachment());
+        mHostInterface = hostInterface;
+        updateSelectedState();
+        if (mAttachmentData == null || !mAttachmentData.equals(attachment)) {
+            mAttachmentData = attachment;
+            updateAttachmentView();
+        }
+    }
+
+    @VisibleForTesting
+    HostInterface testGetHostInterface() {
+        return mHostInterface;
+    }
+
+    public void updateSelectedState() {
+        mCheckBox.setChecked(mHostInterface.isItemSelected(mAttachmentData));
+    }
+
+    private void updateAttachmentView() {
+        mAttachmentViewContainer.removeAllViews();
+        final LayoutInflater inflater = LayoutInflater.from(getContext());
+        final View attachmentView = AttachmentPreviewFactory.createAttachmentPreview(inflater,
+                mAttachmentData, mAttachmentViewContainer,
+                AttachmentPreviewFactory.TYPE_CHOOSER_GRID, true /* startImageRequest */, null);
+        mAttachmentViewContainer.addView(attachmentView);
+    }
+}