*
* The MIT License (MIT)
*
- * Copyright (C) 2017 Kevin Lamonte
+ * Copyright (C) 2019 Kevin Lamonte
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
package jexer;
import jexer.bits.CellAttributes;
+import jexer.bits.StringUtils;
/**
* TRadioGroup is a collection of TRadioButtons with a box and label.
*/
public class TRadioGroup extends TWidget {
+ // ------------------------------------------------------------------------
+ // Variables --------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
/**
* Label for this radio button group.
*/
private TRadioButton selectedButton = null;
/**
- * Get the radio button ID that was selected.
- *
- * @return ID of the selected button, or 0 if no button is selected
+ * If true, one of the children MUST be selected. Note package private
+ * access.
*/
- public int getSelected() {
- if (selectedButton == null) {
- return 0;
- }
- return selectedButton.getId();
- }
+ boolean requiresSelection = true;
- /**
- * Set the new selected radio button. Note package private access.
- *
- * @param button new button that became selected
- */
- void setSelected(final TRadioButton button) {
- assert (button.isSelected());
- if (selectedButton != null) {
- selectedButton.setSelected(false);
- }
- selectedButton = button;
- }
+ // ------------------------------------------------------------------------
+ // Constructors -----------------------------------------------------------
+ // ------------------------------------------------------------------------
/**
* Public constructor.
final String label) {
// Set parent and window
- super(parent, x, y, label.length() + 4, 2);
+ super(parent, x, y, StringUtils.width(label) + 4, 2);
this.label = label;
}
+ // ------------------------------------------------------------------------
+ // TWidget ----------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
/**
* Draw a radio button with label.
*/
radioGroupColor = getTheme().getColor("tradiogroup.inactive");
}
- getScreen().drawBox(0, 0, getWidth(), getHeight(),
- radioGroupColor, radioGroupColor, 3, false);
+ drawBox(0, 0, getWidth(), getHeight(), radioGroupColor, radioGroupColor,
+ 3, false);
+
+ hLineXY(1, 0, StringUtils.width(label) + 2, ' ', radioGroupColor);
+ putStringXY(2, 0, label, radioGroupColor);
+ }
+
+ // ------------------------------------------------------------------------
+ // TRadioGroup ------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Get the radio button ID that was selected.
+ *
+ * @return ID of the selected button, or 0 if no button is selected
+ */
+ public int getSelected() {
+ if (selectedButton == null) {
+ return 0;
+ }
+ return selectedButton.getId();
+ }
+
+ /**
+ * Set the new selected radio button. Note package private access.
+ *
+ * @param button new button that became selected
+ */
+ void setSelected(final TRadioButton button) {
+ assert (button.isSelected());
+ 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;
+ }
- getScreen().hLineXY(1, 0, label.length() + 2, ' ', radioGroupColor);
- getScreen().putStringXY(2, 0, label, radioGroupColor);
+ 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;
}
/**
public TRadioButton addRadioButton(final String label) {
int buttonX = 1;
int buttonY = getChildren().size() + 1;
- if (label.length() + 4 > getWidth()) {
- setWidth(label.length() + 7);
+ if (StringUtils.width(label) + 4 > getWidth()) {
+ setWidth(StringUtils.width(label) + 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;
}
}