1 files changed, 116 insertions, 0 deletions
diff --git a/ui/src/com/android/providers/downloads/ui/DownloadItem.java b/ui/src/com/android/providers/downloads/ui/DownloadItem.java
new file mode 100644
index 00000000..c462d596
--- /dev/null
+++ b/ui/src/com/android/providers/downloads/ui/DownloadItem.java
@@ -0,0 +1,116 @@
+/*
+ * 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.providers.downloads.ui;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.MotionEvent;
+import android.widget.CheckBox;
+import android.widget.RelativeLayout;
+
+/**
+ * This class customizes RelativeLayout to directly handle clicks on the left part of the view and
+ * treat them at clicks on the checkbox. This makes rapid selection of many items easier. This class
+ * also keeps an ID associated with the currently displayed download and notifies a listener upon
+ * selection changes with that ID.
+ */
+public class DownloadItem extends RelativeLayout {
+    private static float CHECKMARK_AREA = -1;
+
+    private boolean mIsInDownEvent = false;
+    private CheckBox mCheckBox;
+    private long mDownloadId;
+    private DownloadSelectListener mListener;
+
+    static interface DownloadSelectListener {
+        public void onDownloadSelectionChanged(long downloadId, boolean isSelected);
+        public boolean isDownloadSelected(long id);
+    }
+
+    public DownloadItem(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+        initialize();
+    }
+
+    public DownloadItem(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        initialize();
+    }
+
+    public DownloadItem(Context context) {
+        super(context);
+        initialize();
+    }
+
+    private void initialize() {
+        if (CHECKMARK_AREA == -1) {
+            CHECKMARK_AREA = getResources().getDimensionPixelSize(R.dimen.checkmark_area);
+        }
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        super.onFinishInflate();
+        mCheckBox = (CheckBox) findViewById(R.id.download_checkbox);
+    }
+
+    public void setDownloadId(long downloadId) {
+        mDownloadId = downloadId;
+    }
+
+    public void setSelectListener(DownloadSelectListener listener) {
+        mListener = listener;
+    }
+
+    @Override
+    public boolean onTouchEvent(MotionEvent event) {
+        boolean handled = false;
+        switch(event.getAction()) {
+            case MotionEvent.ACTION_DOWN:
+                if (event.getX() < CHECKMARK_AREA) {
+                    mIsInDownEvent = true;
+                    handled = true;
+                }
+                break;
+
+            case MotionEvent.ACTION_CANCEL:
+                mIsInDownEvent = false;
+                break;
+
+            case MotionEvent.ACTION_UP:
+                if (mIsInDownEvent && event.getX() < CHECKMARK_AREA) {
+                    toggleCheckMark();
+                    handled = true;
+                }
+                mIsInDownEvent = false;
+                break;
+        }
+
+        if (handled) {
+            postInvalidate();
+        } else {
+            handled = super.onTouchEvent(event);
+        }
+
+        return handled;
+    }
+
+    private void toggleCheckMark() {
+        mCheckBox.toggle();
+        mListener.onDownloadSelectionChanged(mDownloadId, mCheckBox.isChecked());
+    }
+}