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Add focus listener to JSpinner text #13

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merged 1 commit into from
Apr 30, 2015
Merged

Add focus listener to JSpinner text #13

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49 changes: 49 additions & 0 deletions src/main/java/org/scijava/ui/swing/widget/SwingNumberWidget.java
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Original file line number Diff line number Diff line change
Expand Up @@ -31,9 +31,12 @@
package org.scijava.ui.swing.widget;

import java.awt.Adjustable;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.event.AdjustmentEvent;
import java.awt.event.AdjustmentListener;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.text.DecimalFormat;
Expand All @@ -44,11 +47,14 @@
import javax.swing.JScrollBar;
import javax.swing.JSlider;
import javax.swing.JSpinner;
import javax.swing.JTextField;
import javax.swing.SpinnerNumberModel;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

import org.scijava.plugin.Parameter;
import org.scijava.plugin.Plugin;
import org.scijava.thread.ThreadService;
import org.scijava.util.NumberUtils;
import org.scijava.widget.InputWidget;
import org.scijava.widget.NumberWidget;
Expand All @@ -64,6 +70,9 @@ public class SwingNumberWidget extends SwingInputWidget<Number> implements
NumberWidget<JPanel>, AdjustmentListener, ChangeListener
{

@Parameter
private ThreadService threadService;

private JScrollBar scrollBar;
private JSlider slider;
private JSpinner spinner;
Expand Down Expand Up @@ -121,6 +130,9 @@ else if (model.isStyle(NumberWidget.SLIDER_STYLE)) {
final SpinnerNumberModel spinnerModel =
new SpinnerNumberModelFactory().createModel(value, min, max, stepSize);
spinner = new JSpinner(spinnerModel);

fixSpinnerFocus();

fixSpinner(type);
setToolTip(spinner);
getComponent().add(spinner);
Expand Down Expand Up @@ -200,6 +212,43 @@ private void fixSpinner(final Class<?> type) {
}
}

/**
* Adapted from <a href=
* "http://stackoverflow.com/q/20971050/1027800"
* >this SO post</a>.
*
* Tries to ensure that the text of a {@link JSpinner} is selected when it
* has focus.
*/
private void fixSpinnerFocus() {
for (final Component c : spinner.getEditor().getComponents()) {
if (JTextField.class.isAssignableFrom(c.getClass())) {
c.addFocusListener(new FocusListener() {

@Override
public void focusGained(final FocusEvent e) {
queueSelection();
}

@Override
public void focusLost(final FocusEvent e) {
queueSelection();
}

private void queueSelection() {
threadService.queue(new Runnable() {
@Override
public void run() {
((JTextField) c).selectAll();
}
});
}

});
}
}
}

/** Sets slider values to match the spinner. */
private void syncSliders() {
if (slider != null) {
Expand Down