add ToolableViewAnimator

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/ToolableViewAnimator.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2015 Vincent Breitmoser <look@my.amazin.horse>
+ * 
+ * The MIT License (MIT)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+package org.sufficientlysecure.keychain.ui.widget;
+
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.util.AttributeSet;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ViewAnimator;
+
+import org.sufficientlysecure.keychain.R;
+
+
+/** This view is essentially identical to ViewAnimator, but allows specifying the initial view
+ * for preview as an xml attribute. */
+public class ToolableViewAnimator extends ViewAnimator {
+
+    private int mInitChild = -1;
+
+    public ToolableViewAnimator(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs);
+
+        if (isInEditMode()) {
+            TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.ToolableViewAnimator, defStyleAttr, 0);
+            mInitChild = a.getInt(R.styleable.ToolableViewAnimator_initialView, -1);
+            a.recycle();
+        }
+    }
+
+    @Override
+    public void addView(View child, int index, ViewGroup.LayoutParams params) {
+        if (isInEditMode() && mInitChild-- > 0) {
+            return;
+        }
+        super.addView(child, index, params);
+    }
+}

OpenKeychain/src/main/res/values/attr.xml

@@ -1,6 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
 
+    <declare-styleable name="ToolableViewAnimator">
+        <attr name="initialView" format="integer" />
+    </declare-styleable>
+
     <declare-styleable name="FoldableLinearLayout">
         <attr name="foldedLabel" format="string" />
         <attr name="unFoldedLabel" format="string" />