Use empty string to denote regular key release

src/main/com/whitemagicsoftware/kmcaster/EventHandler.java

		import static com.whitemagicsoftware.kmcaster.HardwareState.SWITCH_PRESSED;
		import static com.whitemagicsoftware.kmcaster.HardwareState.SWITCH_RELEASED;
		-import static java.awt.Font.BOLD;
		+import static com.whitemagicsoftware.kmcaster.ui.Constants.*;
		import static javax.swing.SwingConstants.CENTER;
		import static javax.swing.SwingConstants.TOP;

		/**
		* Responsible for controlling the application state between the events
		* and the view.
		*/
		public class EventHandler implements PropertyChangeListener {
		- /**
		- * DejaVu Sans is the only free, open, sans serif font that supports
		- * all the Unicode blocks used by the application. The font size is
		- * arbitrary, the font will be scaled dynamically to the window size.
		- */
		- private static final Font LABEL_FONT = new Font( "DejaVu Sans", BOLD, 32 );
		-
		- /**
		- * Matches the shift-key arrow font colour when pressed.
		- */
		- private static final Color COLOUR_KEY_DN = new Color( 0x21, 0x21, 0x21 );
		-
		- /**
		- * Matches the shift-key arrow font colour when released.
		- */
		- private static final Color COLOUR_KEY_UP = new Color( 0xE5, 0xE5, 0xE5 );

		/**

src/main/com/whitemagicsoftware/kmcaster/HardwareState.java


		/**
		- * Convenience constant.
		+ * Convenience constant used to determine pressed or released state.
		*/
		public final static String BOOLEAN_FALSE = FALSE.toString();

		*/
		public static HardwareState valueFrom( final String state ) {
		- return BOOLEAN_FALSE.equals( state ) ? SWITCH_RELEASED : SWITCH_PRESSED;
		+ return (BOOLEAN_FALSE.equals( state ) \|\| state.isEmpty())
		+ ? SWITCH_RELEASED
		+ : SWITCH_PRESSED;
		}
		}

src/main/com/whitemagicsoftware/kmcaster/KmCaster.java


		import javax.swing.*;
		-import java.awt.*;
		-import java.awt.geom.RoundRectangle2D;
		import java.beans.PropertyChangeListener;

src/main/com/whitemagicsoftware/kmcaster/listeners/KeyboardListener.java

		import java.util.Stack;

		-import static com.whitemagicsoftware.kmcaster.HardwareState.BOOLEAN_FALSE;
		import static com.whitemagicsoftware.kmcaster.HardwareSwitch.*;
		import static java.util.Map.entry;

		() -> {
		final var timer = delayedAction( mDelayRegular, ( action ) ->
		- updateRegular( getDisplayText( e ), BOOLEAN_FALSE )
		+ updateRegular( getDisplayText( e ), "" )
		);

src/main/com/whitemagicsoftware/kmcaster/ui/Constants.java

		import java.awt.*;

		+import static java.awt.Font.BOLD;
		+
		/**
		* Responsible for containing shared constants required by the GUI.

		*/
		public final static int DELAY_KEY_MODIFIER = 150;
		+
		+ /**
		+ * DejaVu Sans is the only free, open, sans serif font that supports
		+ * all the Unicode blocks used by the application. The font size is
		+ * arbitrary, the font will be scaled dynamically to the window size.
		+ */
		+ public static final Font LABEL_FONT = new Font( "DejaVu Sans", BOLD, 32 );
		+
		+ /**
		+ * Matches the shift-key arrow font colour when pressed.
		+ */
		+ public static final Color COLOUR_KEY_DN = new Color( 0x21, 0x21, 0x21 );
		+
		+ /**
		+ * Matches the shift-key arrow font colour when released.
		+ */
		+ public static final Color COLOUR_KEY_UP = new Color( 0xE5, 0xE5, 0xE5 );

		/**

Delta	25 lines added, 23 lines removed, 2-line increase