Android Open Source - FisgoDroid Three State Checbox Hack View

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Back to project page FisgoDroid.

License

The source code is released under:

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Java Source Code

package net.meneame.fisgodroid;
//  ww  w  .j ava 2 s.c o m
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.CheckBox;
import android.widget.CompoundButton;

public class ThreeStateChecboxHackView extends CheckBox
{
    public enum State
    {
        UNCHECKED,
        CHECKED,
        THIRD_STATE
    }
    
    private State mState;
    private Drawable mOriginalBackground;
    private Drawable mThirdStateDrawable = null;

    public ThreeStateChecboxHackView(Context context)
    {
        super(context);
        if ( !isInEditMode() )
            init();
    }

    public ThreeStateChecboxHackView(Context context, AttributeSet attrs)
    {
        super(context, attrs);
        if ( !isInEditMode() )
            init();
    }
    
    private void init ()
    {
        if ( isChecked() )
            mState = State.CHECKED;
        else
            mState = State.UNCHECKED;
        
        mOriginalBackground = getBackground();
        
        setOnCheckedChangeListener(new OnCheckedChangeListener()
        {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
            {
                if ( mThirdStateDrawable == null )
                {
                    mState = isChecked ? State.CHECKED : State.UNCHECKED;
                }
                else if ( !isChecked )
                {
                    if ( mState == State.CHECKED )
                    {
                        mState = State.THIRD_STATE;
                        setBackgroundDrawable(mThirdStateDrawable);
                        setChecked(true);
                    }
                    else if ( mState == State.THIRD_STATE )
                    {
                        mState = State.UNCHECKED;
                        setBackgroundDrawable(mOriginalBackground);
                    }
                }
                else
                {
                    mState = State.CHECKED;
                }
            }
        });
    }
    
    public void setThirdStateDrawable ( Drawable drawable )
    {
        mThirdStateDrawable = drawable;
    }
    
    public State getState ()
    {
        return mState;
    }
    
    public void setState ( State state )
    {
        mState = state;
        
        // Set the visual state
        Drawable drawable = null;
        boolean checked = false;
        switch ( mState )
        {
            case UNCHECKED:
                drawable = mOriginalBackground;
                checked = false;
                break;
            case CHECKED:
                drawable = mOriginalBackground;
                checked = true;
                break;
            case THIRD_STATE:
                drawable = mThirdStateDrawable;
                checked = true;
                break;
        }
        
        setBackgroundDrawable ( drawable != null ? drawable : mOriginalBackground );
        setChecked(checked);
    }
}

Java Source Code List