/**
  * Sets the parent of the view. This is reimplemented to provide the superclass behavior as well
  * as calling the <code>loadChildren</code> method if this view does not already have children.
  * The children should not be loaded in the constructor because the act of setting the parent may
  * cause them to try to search up the hierarchy (to get the hosting <code>Container</code> for
  * example). If this view has children (the view is being moved from one place in the view
  * hierarchy to another), the <code>loadChildren</code> method will not be called.
  *
  * @param parent the parent of the view, <code>null</code> if none
  */
 public void setParent(View parent) {
   super.setParent(parent);
   if ((parent != null) && (nchildren == 0)) {
     ViewFactory f = getViewFactory();
     loadChildren(f);
   }
 }
예제 #2
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    /**
     * Update the flow on the given FlowView. By default, this causes all of the rows (child views)
     * to be rebuilt to match the given constraints for each row. This is called by a
     * FlowView.layout to update the child views in the flow.
     *
     * @param fv the view to reflow
     */
    public void layout(FlowView fv) {
      int p0 = fv.getStartOffset();
      int p1 = fv.getEndOffset();

      // we want to preserve all views from the logicalView from being
      // removed
      View lv = getLogicalView(fv);
      int n = lv.getViewCount();
      for (int i = 0; i < n; i++) {
        View v = lv.getView(i);
        v.setParent(lv);
      }
      fv.removeAll();
      for (int rowIndex = 0; p0 < p1; rowIndex++) {
        View row = fv.createRow();
        fv.append(row);

        // layout the row to the current span.  If nothing fits,
        // force something.
        int next = layoutRow(fv, rowIndex, p0);
        if (row.getViewCount() == 0) {
          row.append(createView(fv, p0, Integer.MAX_VALUE, rowIndex));
          next = row.getEndOffset();
        }
        if (next <= p0) {
          throw new StateInvariantError("infinite loop in formatting");
        } else {
          p0 = next;
        }
      }
    }
 /**
  * Establishes the parent view for this view. Seize this moment to cache the AWT Container I'm in.
  */
 public void setParent(View parent) {
   super.setParent(parent);
   fContainer = parent != null ? getContainer() : null;
   if (parent == null && fComponent != null) {
     fComponent.getParent().remove(fComponent);
     fComponent = null;
   }
 }
예제 #4
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 private void recursiveReparent(View v, View logicalView) {
   int n = v.getViewCount();
   for (int i = 0; i < n; i++) {
     View tmpView = v.getView(i);
     if (contains(logicalView, tmpView)) {
       tmpView.setParent(logicalView);
     } else {
       recursiveReparent(tmpView, logicalView);
     }
   }
 }
예제 #5
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    /**
     * Adjusts the given row if possible to fit within the layout span. By default this will try to
     * find the highest break weight possible nearest the end of the row. If a forced break is
     * encountered, the break will be positioned there.
     *
     * @param rowIndex the row to adjust to the current layout span.
     * @param desiredSpan the current layout span >= 0
     * @param x the location r starts at.
     */
    protected void adjustRow(FlowView fv, int rowIndex, int desiredSpan, int x) {
      final int flowAxis = fv.getFlowAxis();
      View r = fv.getView(rowIndex);
      int n = r.getViewCount();
      int span = 0;
      int bestWeight = BadBreakWeight;
      int bestSpan = 0;
      int bestIndex = -1;
      int bestOffset = 0;
      View v;
      for (int i = 0; i < n; i++) {
        v = r.getView(i);
        int spanLeft = desiredSpan - span;

        int w = v.getBreakWeight(flowAxis, x + span, spanLeft);
        if ((w >= bestWeight) && (w > BadBreakWeight)) {
          bestWeight = w;
          bestIndex = i;
          bestSpan = span;
          if (w >= ForcedBreakWeight) {
            // it's a forced break, so there is
            // no point in searching further.
            break;
          }
        }
        span += v.getPreferredSpan(flowAxis);
      }
      if (bestIndex < 0) {
        // there is nothing that can be broken, leave
        // it in it's current state.
        return;
      }

      // Break the best candidate view, and patch up the row.
      int spanLeft = desiredSpan - bestSpan;
      v = r.getView(bestIndex);
      v = v.breakView(flowAxis, v.getStartOffset(), x + bestSpan, spanLeft);
      View[] va = new View[1];
      va[0] = v;
      View lv = getLogicalView(fv);
      for (int i = bestIndex; i < n; i++) {
        View tmpView = r.getView(i);
        if (contains(lv, tmpView)) {
          tmpView.setParent(lv);
        } else if (tmpView.getViewCount() > 0) {
          recursiveReparent(tmpView, lv);
        }
      }
      r.replace(bestIndex, n - bestIndex, va);
    }
예제 #6
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 /**
  * Forward the DocumentEvent to the given child view. This is implemented to reparent the child
  * to the logical view (the children may have been parented by a row in the flow if they fit
  * without breaking) and then execute the superclass behavior.
  *
  * @param v the child view to forward the event to.
  * @param e the change information from the associated document
  * @param a the current allocation of the view
  * @param f the factory to use to rebuild if the view has children
  * @see #forwardUpdate
  * @since 1.3
  */
 protected void forwardUpdateToView(View v, DocumentEvent e, Shape a, ViewFactory f) {
   v.setParent(this);
   super.forwardUpdateToView(v, e, a, f);
 }