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@@ -9,9 +9,9 @@ |
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public class TextBoxBaseChangeListenableHelper { |
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public interface Participant { |
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public HandlerRegistration addFocusHandler(FocusHandler handler); |
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public HandlerRegistration addFocusHandler( FocusHandler handler ); |
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public HandlerRegistration addBlurHandler(BlurHandler handler); |
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public HandlerRegistration addBlurHandler( BlurHandler handler ); |
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String getText(); |
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@@ -23,40 +23,41 @@ |
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private TextBoxBaseChangeListenableHelper() { |
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} |
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private class Control implements FocusHandler, BlurHandler { |
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private class Control implements FocusHandler, |
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BlurHandler { |
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private final Participant participant; |
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private final HandlerRegistration focus, blur; |
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private boolean participantIsFocused = false; |
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private String currentText = ""; |
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public Control(Participant participant) { |
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public Control( Participant participant ) { |
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this.participant = participant; |
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focus = participant.addFocusHandler(this); |
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blur = participant.addBlurHandler(this); |
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focus = participant.addFocusHandler( this ); |
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blur = participant.addBlurHandler( this ); |
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} |
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private void detach() { |
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remove(focus); |
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remove(blur); |
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remove( focus ); |
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remove( blur ); |
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} |
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private void remove(HandlerRegistration handler) { |
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if (handler != null) { |
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private void remove( HandlerRegistration handler ) { |
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if ( handler != null ) { |
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handler.removeHandler(); |
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} |
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} |
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@Override |
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public void onFocus(FocusEvent event) { |
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public void onFocus( FocusEvent event ) { |
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participantIsFocused = true; |
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currentText = getCurrentText(); |
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setCurrentControl(this); // Enable polling |
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setCurrentControl( this ); // Enable polling |
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} |
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@Override |
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public void onBlur(BlurEvent event) { |
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clearCurrentControl(this); // Disable polling |
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if (participantIsFocused) { |
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public void onBlur( BlurEvent event ) { |
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clearCurrentControl( this ); // Disable polling |
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if ( participantIsFocused ) { |
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checkForChange(); |
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participantIsFocused = false; |
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currentText = ""; |
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@@ -65,7 +66,7 @@ |
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private boolean participantTextChanged() { |
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String value = getCurrentText(); |
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if (!currentText.equals(value)) { |
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if ( !currentText.equals( value ) ) { |
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currentText = value; |
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return true; |
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} |
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@@ -73,11 +74,11 @@ |
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} |
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private String getCurrentText() { |
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return StringUtils.deNull(participant.getText()); |
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return StringUtils.deNull( participant.getText() ); |
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} |
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private void checkForChange() { |
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if (participantIsFocused && participantTextChanged()) { |
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if ( participantIsFocused && participantTextChanged() ) { |
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participant.fireChangeListeners(); |
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} |
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} |
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@@ -87,31 +88,31 @@ |
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private Timer timer = null; |
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private Control currentControl; |
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public void attach(Participant participant) { |
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public void attach( Participant participant ) { |
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boolean wasEmpty = participantControl.isEmpty(); |
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participantControl.put(participant, new Control(participant)); |
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if (wasEmpty) { |
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participantControl.put( participant, new Control( participant ) ); |
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if ( wasEmpty ) { |
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startTimer(); |
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} |
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} |
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public void detach(Participant participant) { |
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Control control = participantControl.remove(participant); |
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if (control != null) { |
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public void detach( Participant participant ) { |
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Control control = participantControl.remove( participant ); |
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if ( control != null ) { |
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control.detach(); |
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if (participantControl.isEmpty()) { |
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if ( participantControl.isEmpty() ) { |
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stopTimer(); |
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} |
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} |
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} |
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private void setCurrentControl(Control control) { |
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private void setCurrentControl( Control control ) { |
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currentControl = control; |
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} |
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private void clearCurrentControl(Control control) { |
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if (control == currentControl) { |
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setCurrentControl(null); |
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private void clearCurrentControl( Control control ) { |
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if ( control == currentControl ) { |
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setCurrentControl( null ); |
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} |
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} |
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@@ -121,16 +122,16 @@ |
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@Override |
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public void run() { |
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Control control = currentControl; |
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if (control != null) { |
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if ( control != null ) { |
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control.checkForChange(); |
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} |
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} |
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}; |
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timer.scheduleRepeating(250); |
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timer.scheduleRepeating( 250 ); |
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} |
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private void stopTimer() { |
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if (timer != null) { |
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if ( timer != null ) { |
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timer.cancel(); |
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timer = null; |
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} |
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