Android Open Source - codemap Zoomable Linear Layout

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License

The source code is released under:

GNU General Public License

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Java Source Code

package com.hdweiss.codemap.util;
/*from www. ja va 2s.  c  o m*/
import android.content.Context;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewParent;
import android.widget.LinearLayout;

import com.hdweiss.codemap.view.workspace.WorkspaceView;

public class ZoomableLinearLayout extends LinearLayout {

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

  public float getScaleFactor() {
    return ((WorkspaceView) getParent()).getScaleFactor();
  }
  

  @Override
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
//    int widthMode = MeasureSpec.getMode(widthMeasureSpec);
//    int widthSize = MeasureSpec.getSize(widthMeasureSpec);
//
//    int heightMode = MeasureSpec.getMode(heightMeasureSpec);
//    int heightSize = MeasureSpec.getSize(heightMeasureSpec);

    float parentScale = getScaleFactor();
    
    measureChildren(widthMeasureSpec, heightMeasureSpec);
    
    int chosenHeight = 0;
    int chosenWidth = 0;
    
    for(int i = 0; i < getChildCount(); i++) {
      View child = getChildAt(i);
      
      chosenHeight += child.getMeasuredHeight();
      chosenWidth = Math.max(child.getMeasuredWidth(), chosenWidth);
    }

    chosenHeight *= parentScale;
    chosenWidth *= parentScale;

    chosenWidth += getPaddingLeft() + getPaddingRight();
    chosenHeight +=  getPaddingBottom() + getPaddingTop();
    
    //Log.d("CodeMap", "Measured to " + chosenWidth + "x" + chosenHeight);
    setMeasuredDimension(chosenWidth, chosenHeight);
  }


//  @Override
//  protected void onDraw(Canvas canvas) {
//    float parentScale = getScaleFactor();
//    
//      canvas.scale(parentScale, parentScale);
//      canvas.save(Canvas.MATRIX_SAVE_FLAG);
//      super.dispatchDraw(canvas);
//      canvas.restore();
//  }

  @Override
  public ViewParent invalidateChildInParent(int[] location, Rect dirty) {
    return super.invalidateChildInParent(location, dirty);
  }
}

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