+ /**
+ * Returns the proportion of its range that a scrollbar's position represents,
+ * as a value between 0 and 1. For example if the whole range is from 0 to
+ * 200, then a position of 40 gives proportion = 0.2.
+ *
+ * @see http://www.javalobby.org/java/forums/t33050.html#91885334
+ *
+ * @param scroll
+ * @return
+ */
+ public static float getScrollBarProportion(JScrollBar scroll)
+ {
+ /*
+ * The extent (scroll handle width) deduction gives the true operating range
+ * of possible positions.
+ */
+ int possibleRange = scroll.getMaximum() - scroll.getMinimum()
+ - scroll.getModel().getExtent();
+ float valueInRange = scroll.getValue()
+ - (scroll.getModel().getExtent() / 2f);
+ float proportion = valueInRange / possibleRange;
+ return proportion;
+ }
+
+ /**
+ * Returns the scroll bar position in its range that would match the given
+ * proportion (between 0 and 1) of the whole. For example if the whole range
+ * is from 0 to 200, then a proportion of 0.25 gives position 50.
+ *
+ * @param scrollbar
+ * @param proportion
+ * @return
+ */
+ public static int getScrollValueForProportion(JScrollBar scrollbar,
+ float proportion)
+ {
+ /*
+ * The extent (scroll handle width) deduction gives the true operating range
+ * of possible positions.
+ */
+ float fraction = proportion
+ * (scrollbar.getMaximum() - scrollbar.getMinimum()
+ - scrollbar.getModel().getExtent())
+ + (scrollbar.getModel().getExtent() / 2f);
+ return Math.min(Math.round(fraction), scrollbar.getMaximum());
+ }
+
+ public static void jvInitComponent(AbstractButton comp, String i18nString)
+ {
+ setColorAndFont(comp);
+ if (i18nString != null && !i18nString.isEmpty())
+ {
+ comp.setText(MessageManager.getString(i18nString));
+ }
+ }
+
+ public static void jvInitComponent(JComponent comp)
+ {
+ setColorAndFont(comp);
+ }
+
+ private static void setColorAndFont(JComponent comp)
+ {
+ comp.setBackground(Color.white);
+ comp.setFont(JvSwingUtils.getLabelFont());
+ }
+
+ /**
+ * A helper method to build a drop-down choice of values, with tooltips for
+ * the entries
+ *
+ * @param entries
+ * @param tooltips
+ */
+ public static JComboBox<Object> buildComboWithTooltips(
+ List<Object> entries, List<String> tooltips)
+ {
+ JComboBox<Object> combo = new JComboBox<>();
+ final ComboBoxTooltipRenderer renderer = new ComboBoxTooltipRenderer();
+ combo.setRenderer(renderer);
+ for (Object attName : entries)
+ {
+ combo.addItem(attName);
+ }
+ renderer.setTooltips(tooltips);
+ final MouseAdapter mouseListener = new MouseAdapter()
+ {
+ @Override
+ public void mouseEntered(MouseEvent e)
+ {
+ int j = combo.getSelectedIndex();
+ if (j > -1)
+ {
+ combo.setToolTipText(tooltips.get(j));
+ }
+ }
+ @Override
+ public void mouseExited(MouseEvent e)
+ {
+ combo.setToolTipText(null);
+ }
+ };
+ for (Component c : combo.getComponents())
+ {
+ c.addMouseListener(mouseListener);
+ }
+ return combo;
+ }
+
+ /**
+ * Adds a titled border to the component in the default font and position (top
+ * left), optionally witht italic text
+ *
+ * @param comp
+ * @param title
+ * @param italic
+ */
+ public static TitledBorder createTitledBorder(JComponent comp,
+ String title, boolean italic)
+ {
+ Font font = comp.getFont();
+ if (italic)
+ {
+ font = new Font(font.getName(), Font.ITALIC, font.getSize());
+ }
+ Border border = BorderFactory.createTitledBorder("");
+ TitledBorder titledBorder = BorderFactory.createTitledBorder(border,
+ title, TitledBorder.LEADING, TitledBorder.DEFAULT_POSITION,
+ font);
+ comp.setBorder(titledBorder);
+
+ return titledBorder;
+ }
+