/**
* Renders using the given rendering surface and area on that surface.
*
* @param g the rendering surface to use
* @param allocation the allocated region to render into
* @see View#paint
*/
public void paint(Graphics g, Shape allocation) {
super.paint(g, allocation);
Rectangle alloc = allocation.getBounds();
Rectangle clip = g.getClipBounds();
// Since listPainter paints in the insets we have to check for the
// case where the child is not painted because the paint region is
// to the left of the child. This assumes the ListPainter paints in
// the left margin.
if ((clip.x + clip.width) < (alloc.x + getLeftInset())) {
Rectangle childRect = alloc;
alloc = getInsideAllocation(allocation);
int n = getViewCount();
int endY = clip.y + clip.height;
for (int i = 0; i < n; i++) {
childRect.setBounds(alloc);
childAllocation(i, childRect);
if (childRect.y < endY) {
if ((childRect.y + childRect.height) >= clip.y) {
listPainter.paint(
g, childRect.x, childRect.y, childRect.width, childRect.height, this, i);
}
} else {
break;
}
}
}
}
/**
* Calculate the needs for the paragraph along the minor axis.
*
* <p>If size requirements are explicitly specified for the paragraph, use that requirements.
* Otherwise, use the requirements of the superclass {@link javax.swing.text.ParagraphView}.
*
* <p>If the {@code axis} parameter is neither {@code View.X_AXIS} nor {@code View.Y_AXIS}, {@link
* IllegalArgumentException} is thrown. If the {@code r} parameter is {@code null,} a new {@code
* SizeRequirements} object is created, otherwise the supplied {@code SizeRequirements} object is
* returned.
*
* @param axis the minor axis
* @param r the input {@code SizeRequirements} object
* @return the new or adjusted {@code SizeRequirements} object
* @throws IllegalArgumentException if the {@code axis} parameter is invalid
*/
protected SizeRequirements calculateMinorAxisRequirements(int axis, SizeRequirements r) {
r = super.calculateMinorAxisRequirements(axis, r);
if (BlockView.spanSetFromAttributes(axis, r, cssWidth, cssHeight)) {
// Offset by the margins so that pref/min/max return the
// right value.
int margin =
(axis == X_AXIS) ? getLeftInset() + getRightInset() : getTopInset() + getBottomInset();
r.minimum -= margin;
r.preferred -= margin;
r.maximum -= margin;
}
return r;
}
protected void setPropertiesFromAttributes() {
super.setPropertiesFromAttributes();
listPainter = getStyleSheet().getListPainter(getAttributes());
}
/**
* Paints one of the children; called by paint(). By default that is all it does, but a subclass
* can use this to paint things relative to the child.
*
* @param g the graphics context
* @param alloc the allocated region to render the child into
* @param index the index of the child
*/
protected void paintChild(Graphics g, Rectangle alloc, int index) {
listPainter.paint(g, alloc.x, alloc.y, alloc.width, alloc.height, this, index);
super.paintChild(g, alloc, index);
}