Trouble in Modifying calculateMinorAxisRequirements() method of BoxView

Question

Hi there,
I have written a custom View, called TreeView that extends BoxView. Basically, my TreeView lays out all its children on y-axis (so it calls BoxView(element,View.Y_AXIS) in constructor), and displays all its children (except the first and the last child) at an offset(determined by a variable INDENT) on the x-axis.
To achieve this, I have over-ridden layoutMinorAxis(int targetSpan, int axis, int[] offsets, int[] spans) method and calculateMinorAxisRequirements(int axis, SizeRequirements r) method in TreeView. Everything works fine, except when I want to use ParagraphView inside TreeView. When I use ParagraphView for all the text content in TreeView (that is, when ParagraphView is a child of TreeView), the text is not wrapped at the right place. As a result, some of the text is clipped at the right side.
Bsically, the text IS wrapped, but not at the right place. So, I have a paragraph with a bunch of lines, but each line has some words clipped/missing at the right end.
I figured out that it has to do with the amount of indentation I use for each child. So if the variable INDENT is 0 (when TreeView is essentially the same as BoxView(element,View.Y_AXIS)) , there is no clipping.
I tried over-ridding getPrefferedSpan(int axis), getMinimumSpan(int axis) and getMaximumSpan(int axis) along with layoutMinorAxis(int targetSpan, int axis, int[] offsets, int[] spans) and calculateMinorAxisRequirements(int axis, SizeRequirements r)
But no luck so far.
Can anyone please please help me with this? What am I doing wrong?
I have been struggling with this since a long time. Please please help me!
Here is the code of TreeView:
<code>
class TreeView extends BoxView
     public TreeView(Element elem)
super(elem, View.Y_AXIS);
public float getAlignment(int axis)
if (axis == View.X_AXIS)
return 0.0f;
return 0.0f;
protected void layoutMinorAxis(int targetSpan, int axis, int[] offsets, int[] spans)
baselineLayout(targetSpan, axis, offsets, spans);
     int n = getViewCount();
     for(int i = 1; i < n-1 ; i++) //leave out the leaf views.
{     offsets[i] += INDENT;
     //spans[i] += INDENT;
/* protected SizeRequirements calculateMinorAxisRequirements(int axis, SizeRequirements r)
     SizeRequirements s = super.calculateMinorAxisRequirements(axis,r);
     if(axis == View.X_AXIS)
     s.minimum += INDENT;
     //s.maximum += INDENT;
     s.preferred += INDENT;
          if(r != null)
               r.minimum += INDENT;
               //s.maximum += INDENT;
               r.preferred += INDENT;
     return s;
     public float getMinimumSpan(int axis)
          float value = 0;
          if(axis == View.X_AXIS)
               value = super.getMinimumSpan(axis);
               value += INDENT;
          else
               value = super.getMinimumSpan(axis);
          return value;
     public float getPreferredSpan(int axis)
          float value = 0;
          if(axis == View.X_AXIS)
               value = super.getPreferredSpan(axis);
               value += INDENT;
          else
               value = super.getPreferredSpan(axis);
          return value;
private static final short INDENT = 20;
</code>
I have commented calculateMinorAxisRequirements() because, I found out that internally it calls getXXXSpan() method. Even if I uncomment it,the result is the same: the text is clipped.
Please please help!
thanks,
Swati

Answer 1

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
// We only support single touches, so anyObject retrieves just that touch from touches
UITouch *touch = [touches anyObject];
// Only move the placard view if the touch was in the placard view
if ([touch view] != placardView) {
// In case of a double tap outside the placard view, update the placard's display string
if ([touch tapCount] == 2) {
[placardView setupNextDisplayString];
return;
// Animate the first touch
CGPoint touchPoint = [touch locationInView:self];
[self animateFirstTouchAtPoint:touchPoint];
Unless the first touch is within the placard this line does not get executed:
[self animateFirstTouchAtPoint:touchPoint];
This method call is required if the 'return to center' animation is to succeed.
You can demonstrate this my first moving starting outside the placard and lifting, the placard does not center. Now just touch the placard and lift, it returns to center.