1 files changed, 203 insertions, 0 deletions
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/FoldableLinearLayout.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/FoldableLinearLayout.java
new file mode 100644
index 000000000..6b2f3bf06
--- /dev/null
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/FoldableLinearLayout.java
@@ -0,0 +1,203 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.sufficientlysecure.keychain.ui.widget;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.util.AttributeSet;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.animation.AlphaAnimation;
+import android.view.animation.Animation;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+import com.beardedhen.androidbootstrap.FontAwesomeText;
+import org.sufficientlysecure.keychain.R;
+
+/**
+ * Class representing a LinearLayout that can fold and hide it's content when pressed
+ * To use just add the following to your xml layout
+
+ <org.sufficientlysecure.keychain.ui.widget.FoldableLinearLayout
+     android:layout_width="wrap_content"
+     android:layout_height="wrap_content"
+     custom:foldedLabel="@string/TEXT_TO_DISPLAY_WHEN_FOLDED"
+     custom:unFoldedLabel="@string/TEXT_TO_DISPLAY_WHEN_UNFOLDED"
+     custom:foldedIcon="ICON_NAME_FROM_FontAwesomeText_TO_USE_WHEN_FOLDED"
+     custom:unFoldedIcon="ICON_NAME_FROM_FontAwesomeText_TO_USE_WHEN_UNFOLDED">
+
+    <include layout="@layout/ELEMENTS_TO_BE_FOLDED"/>
+
+ </org.sufficientlysecure.keychain.ui.widget.FoldableLinearLayout>
+
+ */
+public class FoldableLinearLayout extends LinearLayout {
+
+    private FontAwesomeText mFoldableIcon;
+    private boolean mFolded;
+    private boolean mHasMigrated = false;
+    private Integer mShortAnimationDuration = null;
+    private TextView mFoldableTextView = null;
+    private LinearLayout mFoldableContainer = null;
+    private View mFoldableLayout = null;
+
+    private String mFoldedIconName;
+    private String mUnFoldedIconName;
+    private String mFoldedLabel;
+    private String mUnFoldedLabel;
+
+    public FoldableLinearLayout(Context context) {
+        super(context);
+        processAttributes(context, null);
+    }
+
+    public FoldableLinearLayout(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        processAttributes(context, attrs);
+    }
+
+    public FoldableLinearLayout(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs);
+        processAttributes(context, attrs);
+    }
+
+    /**
+     * Load given attributes to inner variables,
+     * @param context
+     * @param attrs
+     */
+    private void processAttributes(Context context, AttributeSet attrs) {
+        if (attrs != null) {
+            TypedArray a = context.obtainStyledAttributes(attrs,
+                    R.styleable.FoldableLinearLayout, 0, 0);
+            mFoldedIconName = a.getString(R.styleable.FoldableLinearLayout_foldedIcon);
+            mUnFoldedIconName = a.getString(R.styleable.FoldableLinearLayout_unFoldedIcon);
+            mFoldedLabel = a.getString(R.styleable.FoldableLinearLayout_foldedLabel);
+            mUnFoldedLabel = a.getString(R.styleable.FoldableLinearLayout_unFoldedLabel);
+            a.recycle();
+        }
+        // If any attribute isn't found then set a default one
+        mFoldedIconName = (mFoldedIconName == null) ? "fa-chevron-right" : mFoldedIconName;
+        mUnFoldedIconName = (mUnFoldedIconName == null) ? "fa-chevron-down" : mUnFoldedIconName;
+        mFoldedLabel = (mFoldedLabel == null) ? context.getString(R.id.none) : mFoldedLabel;
+        mUnFoldedLabel = (mUnFoldedLabel == null) ? context.getString(R.id.none) : mUnFoldedLabel;
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        // if the migration has already happened
+        // there is no need to move any children
+        if (!mHasMigrated) {
+            migrateChildrenToContainer();
+            mHasMigrated = true;
+        }
+
+        initialiseInnerViews();
+
+        super.onFinishInflate();
+    }
+
+    /**
+     * Migrates Child views as declared in xml to the inner foldableContainer
+     */
+    private void migrateChildrenToContainer() {
+        // Collect children of FoldableLinearLayout as declared in XML
+        int childNum = getChildCount();
+        View[] children = new View[childNum];
+
+        for (int i = 0; i < childNum; i++) {
+            children[i] = getChildAt(i);
+        }
+        if (children[0].getId() == R.id.foldableControl) {
+
+        }
+
+        // remove all of them from FoldableLinearLayout
+        detachAllViewsFromParent();
+
+        // Inflate the inner foldable_linearlayout.xml
+        LayoutInflater inflator = (LayoutInflater) getContext().getSystemService(
+                Context.LAYOUT_INFLATER_SERVICE);
+
+        mFoldableLayout = inflator.inflate(R.layout.foldable_linearlayout, this, true);
+        mFoldableContainer = (LinearLayout) mFoldableLayout.findViewById(R.id.foldableContainer);
+
+        // Push previously collected children into foldableContainer.
+        for (int i = 0; i < childNum; i++) {
+            addView(children[i]);
+        }
+    }
+
+    private void initialiseInnerViews() {
+        mFoldableIcon = (FontAwesomeText) mFoldableLayout.findViewById(R.id.foldableIcon);
+        mFoldableIcon.setIcon(mFoldedIconName);
+        mFoldableTextView = (TextView) mFoldableLayout.findViewById(R.id.foldableText);
+        mFoldableTextView.setText(mFoldedLabel);
+
+        // retrieve and cache the system's short animation time
+        mShortAnimationDuration = getResources().getInteger(android.R.integer.config_shortAnimTime);
+
+        LinearLayout foldableControl = (LinearLayout) mFoldableLayout.findViewById(R.id.foldableControl);
+        foldableControl.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                mFolded = !mFolded;
+                if (mFolded) {
+                    mFoldableIcon.setIcon(mUnFoldedIconName);
+                    mFoldableContainer.setVisibility(View.VISIBLE);
+                    AlphaAnimation animation = new AlphaAnimation(0f, 1f);
+                    animation.setDuration(mShortAnimationDuration);
+                    mFoldableContainer.startAnimation(animation);
+                    mFoldableTextView.setText(mUnFoldedLabel);
+
+                } else {
+                    mFoldableIcon.setIcon(mFoldedIconName);
+                    AlphaAnimation animation = new AlphaAnimation(1f, 0f);
+                    animation.setDuration(mShortAnimationDuration);
+                    animation.setAnimationListener(new Animation.AnimationListener() {
+                        @Override
+                        public void onAnimationStart(Animation animation) { }
+
+                        @Override
+                        public void onAnimationEnd(Animation animation) {
+                            // making sure that at the end the container is completely removed from view
+                            mFoldableContainer.setVisibility(View.GONE);
+                        }
+
+                        @Override
+                        public void onAnimationRepeat(Animation animation) { }
+                    });
+                    mFoldableContainer.startAnimation(animation);
+                    mFoldableTextView.setText(mFoldedLabel);
+                }
+            }
+        });
+
+    }
+
+    /**
+     * Adds provided child view to foldableContainer View
+     * @param child
+     */
+    @Override
+    public void addView(View child) {
+        if (mFoldableContainer != null) {
+            mFoldableContainer.addView(child);
+        }
+    }
+}