--- /dev/null
+/*
+ * Copyright (C) 2016 Tobias Brunner
+ * HSR Hochschule fuer Technik Rapperswil
+ *
+ * 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 2 of the License, or (at your
+ * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * 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.
+ */
+
+package org.strongswan.android.ui.widget;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.support.annotation.Nullable;
+import android.support.design.widget.TextInputLayout;
+import android.support.v4.view.ViewCompat;
+import android.support.v4.view.ViewPropertyAnimatorListenerAdapter;
+import android.text.Editable;
+import android.text.TextWatcher;
+import android.util.AttributeSet;
+import android.util.TypedValue;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.EditText;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+import org.strongswan.android.R;
+
+/**
+ * Layout that extends {@link android.support.design.widget.TextInputLayout} with a helper text
+ * displayed below the text field when it receives the focus. Also, any error message shown with
+ * {@link #setError(CharSequence)} is hidden when the text field is changed (this mirrors the
+ * behavior of {@link android.widget.EditText}).
+ */
+public class TextInputLayoutHelper extends TextInputLayout
+{
+ private LinearLayout mHelperContainer;
+ private TextView mHelperText;
+
+ public TextInputLayoutHelper(Context context)
+ {
+ this(context, null);
+ }
+
+ public TextInputLayoutHelper(Context context, AttributeSet attrs)
+ {
+ this(context, attrs, 0);
+ }
+
+ public TextInputLayoutHelper(Context context, AttributeSet attrs, int defStyleAttr)
+ {
+ super(context, attrs);
+ TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.TextInputLayoutHelper);
+ String helper = a.getString(R.styleable.TextInputLayoutHelper_helper_text);
+ a.recycle();
+ if (helper != null)
+ {
+ mHelperContainer = new LinearLayout(context);
+ mHelperContainer.setOrientation(LinearLayout.HORIZONTAL);
+ mHelperContainer.setVisibility(View.INVISIBLE);
+ addView(mHelperContainer, LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
+
+ mHelperText = new TextView(context);
+ mHelperText.setText(helper);
+ mHelperText.setTextSize(TypedValue.COMPLEX_UNIT_SP, 12);
+ a = context.obtainStyledAttributes(attrs, new int[]{android.R.attr.textColorSecondary});
+ mHelperText.setTextColor(a.getColor(0, mHelperText.getCurrentTextColor()));
+ a.recycle();
+
+ mHelperContainer.addView(mHelperText, LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
+ }
+ }
+
+ @Override
+ public void addView(View child, int index, ViewGroup.LayoutParams params)
+ {
+ super.addView(child, index, params);
+ if (child instanceof EditText)
+ {
+ EditText text = (EditText)child;
+ text.addTextChangedListener(new TextWatcher() {
+ @Override
+ public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
+
+ @Override
+ public void onTextChanged(CharSequence s, int start, int before, int count) {}
+
+ @Override
+ public void afterTextChanged(Editable s)
+ {
+ if (getError() != null)
+ {
+ setError(null);
+ }
+ }
+ });
+ if (mHelperContainer != null)
+ {
+ text.setOnFocusChangeListener(new OnFocusChangeListener() {
+ @Override
+ public void onFocusChange(View v, boolean hasFocus)
+ {
+ showHelper(hasFocus);
+ }
+ });
+ ViewCompat.setPaddingRelative(mHelperContainer, ViewCompat.getPaddingStart(text),
+ 0, ViewCompat.getPaddingEnd(text), text.getPaddingBottom());
+ }
+ }
+ }
+
+ @Override
+ public void setError(@Nullable CharSequence error)
+ {
+ super.setError(error);
+ if (mHelperContainer != null)
+ {
+ if (error == null)
+ { /* this frees up space used by the now invisible error message */
+ setErrorEnabled(false);
+ }
+ else
+ { /* re-add the helper as the error message should be displayed directly under the textbox */
+ removeView(mHelperContainer);
+ addView(mHelperContainer, LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
+ }
+ }
+ }
+
+ /**
+ * Set the helper text to be displayed below the text field.
+ *
+ * @attr ref R.styleable#TextInputLayoutHelper_helper_text
+ */
+ public void setHelperText(CharSequence text)
+ {
+ mHelperText.setText(text);
+ }
+
+ private void showHelper(boolean show)
+ {
+ if (show == (mHelperContainer.getVisibility() == View.VISIBLE))
+ {
+ return;
+ }
+ if (show)
+ {
+ ViewCompat.animate(mHelperContainer)
+ .alpha(1f)
+ .setDuration(200)
+ .setListener(new ViewPropertyAnimatorListenerAdapter() {
+ @Override
+ public void onAnimationStart(View view)
+ {
+ view.setVisibility(View.VISIBLE);
+ }
+ }).start();
+ }
+ else
+ {
+ ViewCompat.animate(mHelperContainer)
+ .alpha(0f)
+ .setDuration(200)
+ .setListener(new ViewPropertyAnimatorListenerAdapter() {
+ @Override
+ public void onAnimationEnd(View view)
+ {
+ view.setVisibility(View.INVISIBLE);
+ }
+ }).start();
+ }
+ }
+}
projects / strongswan.git / commitdiff