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/*
* Copyright 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.example.android.clippingbasic;
import com.example.android.common.logger.Log;
import android.graphics.Outline;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewOutlineProvider;
import android.widget.Button;
import android.widget.TextView;
/**
* This sample shows how to clip a {@link View} using an {@link Outline}.
*/
public class ClippingBasicFragment extends Fragment {
private final static String TAG = "ClippingBasicFragment";
/* Store the click count so that we can show a different text on every click. */
private int mClickCount = 0;
/* The {@Link Outline} used to clip the image with. */
private ViewOutlineProvider mOutlineProvider;
/* An array of texts. */
private String[] mSampleTexts;
/* A reference to a {@Link TextView} that shows different text strings when clicked. */
private TextView mTextView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
mOutlineProvider = new ClipOutlineProvider();
mSampleTexts = getResources().getStringArray(R.array.sample_texts);
}
@Override
public View onCreateView(
LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.clipping_basic_fragment, container, false);
}
@Override
public void onViewCreated(final View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
/* Set the initial text for the TextView. */
mTextView = (TextView) view.findViewById(R.id.text_view);
changeText();
final View clippedView = view.findViewById(R.id.frame);
/* Sets the OutlineProvider for the View. */
clippedView.setOutlineProvider(mOutlineProvider);
/* When the button is clicked, the text is clipped or un-clipped. */
view.findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View bt) {
// Toggle whether the View is clipped to the outline
if (clippedView.getClipToOutline()) {
/* The Outline is set for the View, but disable clipping. */
clippedView.setClipToOutline(false);
Log.d(TAG, String.format("Clipping to outline is disabled"));
((Button) bt).setText(R.string.clip_button);
} else {
/* Enables clipping on the View. */
clippedView.setClipToOutline(true);
Log.d(TAG, String.format("Clipping to outline is enabled"));
((Button) bt).setText(R.string.unclip_button);
}
}
});
/* When the text is clicked, a new string is shown. */
view.findViewById(R.id.text_view).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mClickCount++;
// Update the text in the TextView
changeText();
// Invalidate the outline just in case the TextView changed size
clippedView.invalidateOutline();
}
});
}
private void changeText() {
// Compute the position of the string in the array using the number of strings
// and the number of clicks.
String newText = mSampleTexts[mClickCount % mSampleTexts.length];
/* Once the text is selected, change the TextView */
mTextView.setText(newText);
Log.d(TAG, String.format("Text was changed."));
}
/**
* A {@link ViewOutlineProvider} which clips the view with a rounded rectangle which is inset
* by 10%
*/
private class ClipOutlineProvider extends ViewOutlineProvider {
@Override
public void getOutline(View view, Outline outline) {
final int margin = Math.min(view.getWidth(), view.getHeight()) / 10;
outline.setRoundRect(margin, margin, view.getWidth() - margin,
view.getHeight() - margin, margin / 2);
}
}
}
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