mirror of https://github.com/tasks/tasks
Tim Su
13 years ago
commit
4eaeaf97d8
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package com.todoroo.astrid.ui;
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import android.content.Context;
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import android.util.AttributeSet;
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import android.view.ViewDebug;
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import android.widget.Checkable;
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import android.widget.ImageView;
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public class CheckableImageView extends ImageView implements Checkable {
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private static final int[] CHECKED_STATE_SET = {
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android.R.attr.state_checked
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};
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public CheckableImageView(Context context, AttributeSet attrs) {
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super(context, attrs);
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}
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public static interface OnCheckedChangeListener {
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public void onCheckedChanged(Checkable c, boolean isChecked);
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}
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@Override
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public boolean performClick() {
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toggle();
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return super.performClick();
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}
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private boolean mChecked;
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private boolean mBroadcasting;
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private OnCheckedChangeListener mOnCheckedChangeListener;
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public void toggle() {
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setChecked(!mChecked);
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}
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@ViewDebug.ExportedProperty
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public boolean isChecked() {
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return mChecked;
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}
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/**
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* <p>Changes the checked state of this button.</p>
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*
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* @param checked true to check the button, false to uncheck it
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*/
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public void setChecked(boolean checked) {
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if (mChecked != checked) {
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mChecked = checked;
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refreshDrawableState();
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// Avoid infinite recursions if setChecked() is called from a listener
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if (mBroadcasting) {
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return;
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}
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mBroadcasting = true;
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if (mOnCheckedChangeListener != null) {
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mOnCheckedChangeListener.onCheckedChanged(this, mChecked);
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}
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mBroadcasting = false;
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}
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}
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/**
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* Register a callback to be invoked when the checked state of this button
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* changes.
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*
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* @param listener the callback to call on checked state change
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*/
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public void setOnCheckedChangeListener(OnCheckedChangeListener listener) {
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mOnCheckedChangeListener = listener;
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}
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@Override
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public int[] onCreateDrawableState(int extraSpace) {
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final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
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if (isChecked()) {
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mergeDrawableStates(drawableState, CHECKED_STATE_SET);
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}
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return drawableState;
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}
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@Override
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protected void drawableStateChanged() {
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super.drawableStateChanged();
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if (getDrawable() != null) {
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int[] myDrawableState = getDrawableState();
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// Set the state of the Drawable
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getDrawable().setState(myDrawableState);
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invalidate();
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}
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}
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}
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