" : ""));
}
}
@@ -122,14 +145,16 @@ public final class JvSwingUtils
public static JPanel addtoLayout(JPanel panel, String tooltip,
JComponent label, JComponent valBox)
{
- JPanel laypanel = new JPanel(), labPanel = new JPanel(), valPanel = new JPanel();
+ JPanel laypanel = new JPanel(new GridLayout(1, 2));
+ JPanel labPanel = new JPanel(new BorderLayout());
+ JPanel valPanel = new JPanel();
// laypanel.setSize(panel.getPreferredSize());
// laypanel.setLayout(null);
labPanel.setBounds(new Rectangle(7, 7, 158, 23));
valPanel.setBounds(new Rectangle(172, 7, 270, 23));
// labPanel.setLayout(new GridLayout(1,1));
// valPanel.setLayout(new GridLayout(1,1));
- labPanel.add(label);
+ labPanel.add(label, BorderLayout.WEST);
valPanel.add(valBox);
laypanel.add(labPanel);
laypanel.add(valPanel);
@@ -212,6 +237,53 @@ public final class JvSwingUtils
}
}
+ /**
+ * 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);