BoardPostText.java

package my.package.view;

import my.package.MyActivity;
import my.package.MyUtils.FloatingText;
import my.package.R;

import android.content.Context;
import android.text.SpannableString;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.view.animation.Animation;
import android.view.animation.Transformation;
import android.widget.TextView;

public class BoardPostText extends TextView implements View.OnClickListener, View.OnLongClickListener {
  
	private boolean full_mode = false;
	private boolean lock = false;
	private int max_h = 0;
	private int hidden_h = 0;

	public BoardPostText(Context context) {
		super(context);
		prepareMe();
	}

	public BoardPostText(Context context, AttributeSet attrs) {
		super(context, attrs);
		prepareMe();
	}

	public BoardPostText(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
		prepareMe();
	}
	
	private void prepareMe() {
		setOnClickListener(this);
		setOnLongClickListener(this);
		
		max_h = getResources().getDimensionPixelSize(R.dimen.post_image_max_height);
	}
	
	class ExpandAnimation extends Animation {
		
		ExpandAnimation() {
			super();
			setDuration((long) getResources().getDimension(R.dimen.text_expand_speed));
		}
		
		ExpandAnimation(Context context, AttributeSet attrs) {
			super(context, attrs);
			setDuration((long) getResources().getDimension(R.dimen.text_expand_speed));
		}
		
		@Override
		protected void applyTransformation(float it, Transformation t) {
			if(!lock) return;
			
			int new_h = 0;
			if (!full_mode) {
				new_h = (int) (max_h + hidden_h*it);
			} else {
				new_h = (int) (max_h + hidden_h*(1.0f - it));
			}
			
			//getLayoutParams().height = new_h;			
			setMaxHeight(new_h);
			
			if(it >= 1.0f) {
				full_mode = !full_mode;
				lock = false;
				
				//postInvalidateDelayed(100);
				
				/* so here some other things, i've tried
				
				postDelayed( new Runnable() {

					@Override
					public void run() {
						
						requestLayout();
					}
					
				}, 100 );*/
				
				/* 
				
				setGravity(Gravity.TOP|Gravity.CLIP_VERTICAL|Gravity.FILL_HORIZONTAL);
				requestLayout();*/
			}
		}
		
		@Override
		public boolean willChangeBounds() {
			return true;
		}
	};
	
	public void onClick(View view) {
		if(lock) 
			return;
		
		lock = true;
		
		hidden_h = (getLineCount()+2)*getLineHeight() - max_h;
		if(hidden_h<=0)
			return;
		
		startAnimation(new ExpandAnimation());
	}
	
	public void lock() {
		lock = true;
	}
	
	public void unlock() {
		lock = false;
	}
	
	public void shrink() {
		stopAnimation();
		lock = false;
		full_mode = false;
		setMaxHeight(max_h);
		//getLayoutParams().height = LayoutParams.WRAP_CONTENT;
		requestLayout();
	}
	
	public void expand() {
		stopAnimation();
		lock = true;
		full_mode = true;
		setMaxHeight(Integer.MAX_VALUE);
		//getLayoutParams().height = LayoutParams.WRAP_CONTENT;
		requestLayout();
	}
	
	private void stopAnimation() {
		
		if(MyActivity.android_ver<8)
			return;
		
		Animation anim = getAnimation();
		if(anim!=null)
			anim.cancel();
	}
	
	public boolean isFullMode() {
		return full_mode;
	}
	
	public void setMargin(int width, int height) {
		if(MyActivity.android_ver<8)
			return;
		
		int lines = (int)Math.ceil( ((float)height)/getLineHeight() );
		
		CharSequence text = getText();
		if(text!=null && (text instanceof SpannableString)) {
			FloatingText[] fl_text = ((SpannableString)text).getSpans(0, text.length(), FloatingText.class);
			if( fl_text.length>0 ) {
				fl_text[0].setMargin(lines, width);
				postInvalidate();
			}
		}
	}

	@Override
	public boolean onLongClick(View v) {
		return ((View)getParent()).performLongClick();
	}
	
}