100 lines
2.4 KiB
Java
100 lines
2.4 KiB
Java
package org.moire.ultrasonic.view;
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import android.content.Context;
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import android.util.AttributeSet;
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import android.view.MotionEvent;
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import android.view.View;
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import android.widget.ImageView;
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import androidx.appcompat.widget.AppCompatImageView;
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public class AutoRepeatButton extends AppCompatImageView
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{
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private long initialRepeatDelay = 1000;
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private boolean doClick = true;
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private Runnable repeatEvent;
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private Runnable repeatClickWhileButtonHeldRunnable = new Runnable()
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{
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@Override
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public void run()
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{
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doClick = false;
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//Perform the present repetition of the click action provided by the user
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// in setOnClickListener().
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if (repeatEvent != null) repeatEvent.run();
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//Schedule the next repetitions of the click action, using a faster repeat
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// interval than the initial repeat delay interval.
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long repeatIntervalInMilliseconds = 300;
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postDelayed(repeatClickWhileButtonHeldRunnable, repeatIntervalInMilliseconds);
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}
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};
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private void commonConstructorCode()
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{
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this.setOnTouchListener(new OnTouchListener()
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{
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@Override
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public boolean onTouch(View v, MotionEvent event)
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{
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int action = event.getAction();
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if (action == MotionEvent.ACTION_DOWN)
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{
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doClick = true;
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//Just to be sure that we removed all callbacks,
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// which should have occurred in the ACTION_UP
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removeCallbacks(repeatClickWhileButtonHeldRunnable);
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//Schedule the start of repetitions after a one half second delay.
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postDelayed(repeatClickWhileButtonHeldRunnable, initialRepeatDelay);
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setPressed(true);
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}
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else if (action == MotionEvent.ACTION_UP)
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{
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//Cancel any repetition in progress.
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removeCallbacks(repeatClickWhileButtonHeldRunnable);
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if (doClick || repeatEvent == null)
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{
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performClick();
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}
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setPressed(false);
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}
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//Returning true here prevents performClick() from getting called
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// in the usual manner, which would be redundant, given that we are
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// already calling it above.
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return true;
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}
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});
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}
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public void setOnRepeatListener(Runnable runnable)
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{
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repeatEvent = runnable;
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}
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public AutoRepeatButton(Context context, AttributeSet attrs, int defStyle)
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{
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super(context, attrs, defStyle);
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commonConstructorCode();
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}
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public AutoRepeatButton(Context context, AttributeSet attrs)
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{
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super(context, attrs);
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commonConstructorCode();
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}
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public AutoRepeatButton(Context context)
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{
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super(context);
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commonConstructorCode();
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}
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}
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