Example #1
0
  /**
   * Performs layout for the minor axis of the box (i.e. the axis orthogonal to the axis that it
   * represents). The results of the layout (the offset and span for each children) are placed in
   * the given arrays which represent the allocations to the children along the minor axis.
   *
   * @param targetSpan the total span given to the view, which would be used to layout the children.
   * @param axis the axis being layed out
   * @param offsets the offsets from the origin of the view for each of the child views; this is a
   *     return value and is filled in by the implementation of this method
   * @param spans the span of each child view; this is a return value and is filled in by the
   *     implementation of this method
   */
  protected void layoutMinorAxis(int targetSpan, int axis, int[] offsets, int[] spans) {
    int n = getViewCount();
    Object key = (axis == X_AXIS) ? CSS.Attribute.WIDTH : CSS.Attribute.HEIGHT;
    for (int i = 0; i < n; i++) {
      View v = getView(i);
      int min = (int) v.getMinimumSpan(axis);
      int max;

      // check for percentage span
      AttributeSet a = v.getAttributes();
      CSS.LengthValue lv = (CSS.LengthValue) a.getAttribute(key);
      if ((lv != null) && lv.isPercentage()) {
        // bound the span to the percentage specified
        min = Math.max((int) lv.getValue(targetSpan), min);
        max = min;
      } else {
        max = (int) v.getMaximumSpan(axis);
      }

      // assign the offset and span for the child
      if (max < targetSpan) {
        // can't make the child this wide, align it
        float align = v.getAlignment(axis);
        offsets[i] = (int) ((targetSpan - max) * align);
        spans[i] = max;
      } else {
        // make it the target width, or as small as it can get.
        offsets[i] = 0;
        spans[i] = Math.max(min, targetSpan);
      }
    }
  }
Example #2
0
 /**
  * Gets the alignment.
  *
  * @param axis may be either X_AXIS or Y_AXIS
  * @return the alignment
  */
 public float getAlignment(int axis) {
   switch (axis) {
     case View.X_AXIS:
       return 0;
     case View.Y_AXIS:
       if (getViewCount() == 0) {
         return 0;
       }
       float span = getPreferredSpan(View.Y_AXIS);
       View v = getView(0);
       float above = v.getPreferredSpan(View.Y_AXIS);
       float a = (((int) span) != 0) ? (above * v.getAlignment(View.Y_AXIS)) / span : 0;
       return a;
     default:
       throw new IllegalArgumentException("Invalid axis: " + axis);
   }
 }