Accessibilty support for the print UI.

bug:15816751

Change-Id: I5dcdbdd0357843b870ddd47d7c41cfba114d194c

1 files changed, 89 insertions, 0 deletions

diff --git a/packages/PrintSpooler/src/com/android/printspooler/widget/PreviewPageFrame.java b/packages/PrintSpooler/src/com/android/printspooler/widget/PreviewPageFrame.java
new file mode 100644
index 0000000..feb0316
--- /dev/null
+++ b/packages/PrintSpooler/src/com/android/printspooler/widget/PreviewPageFrame.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2014 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.printspooler.widget;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.accessibility.AccessibilityEvent;
+import android.view.accessibility.AccessibilityNodeInfo;
+import android.widget.CompoundButton;
+import android.widget.LinearLayout;
+import com.android.printspooler.R;
+
+/**
+ * This class represents the frame of page in the print preview list
+ * that contains the page and a footer.
+ */
+public final class PreviewPageFrame extends LinearLayout {
+    private final float mSelectedElevation;
+    private final float mNotSelectedElevation;
+
+    private final float mSelectedPageAlpha;
+    private final float mNotSelectedAlpha;
+
+    public PreviewPageFrame(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        mSelectedElevation = mContext.getResources().getDimension(
+                R.dimen.selected_page_elevation);
+        mNotSelectedElevation = mContext.getResources().getDimension(
+                R.dimen.unselected_page_elevation);
+        mSelectedPageAlpha = mContext.getResources().getFraction(
+                R.fraction.page_selected_alpha, 1, 1);
+        mNotSelectedAlpha = mContext.getResources().getFraction(
+                R.fraction.page_unselected_alpha, 1, 1);
+    }
+
+    @Override
+    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
+        super.onInitializeAccessibilityEvent(event);
+        event.setClassName(CompoundButton.class.getName());
+        event.setChecked(isSelected());
+    }
+
+    @Override
+    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
+        super.onInitializeAccessibilityNodeInfo(info);
+        info.setClassName(CompoundButton.class.getName());
+        info.setSelected(false);
+        info.setCheckable(true);
+        info.setChecked(isSelected());
+    }
+
+    public void setSelected(boolean selected, boolean animate) {
+        if (isSelected() == selected) {
+            return;
+        }
+        setSelected(selected);
+        if (selected) {
+            if (animate) {
+                animate().translationZ(mSelectedElevation)
+                        .alpha(mSelectedPageAlpha);
+            } else {
+                setTranslationZ(mSelectedElevation);
+                setAlpha(mSelectedPageAlpha);
+            }
+        } else {
+            if (animate) {
+                animate().translationZ(mNotSelectedElevation)
+                        .alpha(mNotSelectedAlpha);
+            } else {
+                setTranslationZ(mNotSelectedElevation);
+                setAlpha(mNotSelectedAlpha);
+            }
+        }
+    }
+}