*/
private TRadioButton selectedButton = null;
+ /**
+ * If true, one of the children MUST be selected. Note package private
+ * access.
+ */
+ boolean requiresSelection = true;
+
// ------------------------------------------------------------------------
// Constructors -----------------------------------------------------------
// ------------------------------------------------------------------------
*/
void setSelected(final TRadioButton button) {
assert (button.isSelected());
- if (selectedButton != null) {
+ if ((selectedButton != null) && (selectedButton != button)) {
selectedButton.setSelected(false);
}
selectedButton = button;
}
+ /**
+ * Set the new selected radio button. 1-based.
+ *
+ * @param id ID of the selected button, or 0 to unselect
+ */
+ public void setSelected(final int id) {
+ if ((id < 0) || (id > getChildren().size())) {
+ return;
+ }
+
+ if (id == 0) {
+ for (TWidget widget: getChildren()) {
+ ((TRadioButton) widget).setSelected(false);
+ }
+ selectedButton = null;
+ return;
+ }
+ assert ((id > 0) && (id <= getChildren().size()));
+ TRadioButton button = (TRadioButton) (getChildren().get(id - 1));
+ button.setSelected(true);
+ selectedButton = button;
+ }
+
/**
* Convenience function to add a radio button to this group.
*
setWidth(label.length() + 7);
}
setHeight(getChildren().size() + 3);
- return new TRadioButton(this, buttonX, buttonY, label,
+ TRadioButton button = new TRadioButton(this, buttonX, buttonY, label,
getChildren().size() + 1);
+
+ // Default to the first item on the list.
+ activate(getChildren().get(0));
+
+ return button;
}
}