On-screen keyboard improvements (#323)

* holding a number key to type a number in text modes is now possible using the on-screen keyboard

* accented letters are no longer displayed on the on-screen keyboard, just plain A-Z

* the on-screen keyboard is now more compact; 

* improved color scheme and other small visual enhancements

src/io/github/sspanak/tt9/languages/Language.java

@@ -12,13 +12,11 @@ public class Language {
 	protected String name;
 	protected Locale locale;
 	protected String dictionaryFile;
+	protected boolean hasUpperCase = true;
 	protected String abcString;
 	protected final ArrayList<ArrayList<String>> layout = new ArrayList<>();
 	private final HashMap<Character, String> characterKeyMap = new HashMap<>();
 
-	// settings
-	protected boolean hasUpperCase = true;
-
 
 	public static Language fromDefinition(LanguageDefinition definition) throws Exception {
 		if (definition.dictionaryFile.isEmpty()) {
@@ -149,6 +147,25 @@ public class Language {
 		return hasUpperCase;
 	}
 
+	/**
+	 * isLatinBased
+	 * Returns "true" when the language is based on the Latin alphabet or "false" otherwise.
+	 * WARNING: This performs somewhat resource-intensive operations every time, so consider
+	 * caching the result.
+	 */
+	public boolean isLatinBased() {
+		ArrayList<String> letters = getKeyCharacters(2, false);
+		return letters.contains("a");
+	}
+
+	/**
+	 * isGreek
+	 * Similar to "isLatinBased()", this returns "true" when the language is based on the Greek alphabet.
+	 */
+	public boolean isGreek() {
+		ArrayList<String> letters = getKeyCharacters(2, false);
+		return letters.contains("α");
+	}
 
 	/* ************ utility ************ */
 

src/io/github/sspanak/tt9/ui/main/MainLayoutNumpad.java

@@ -72,13 +72,19 @@ class MainLayoutNumpad extends BaseMainLayout {
 			}
 		}
 
+		ViewGroup statusBarContainer = view.findViewById(R.id.status_bar_container);
+		keys.addAll(getKeysFromContainer(statusBarContainer));
+
 		return keys;
 	}
 
 	protected ArrayList<View> getSeparators() {
 		// it's fine... it's shorter, faster and easier to read than searching with 3 nested loops
 		return new ArrayList<>(Arrays.asList(
-			view.findViewById(R.id.separator_0),
+			view.findViewById(R.id.separator_top),
+			view.findViewById(R.id.separator_candidates_1),
+			view.findViewById(R.id.separator_candidates_2),
+			view.findViewById(R.id.separator_candidates_bottom),
 			view.findViewById(R.id.separator_1_1),
 			view.findViewById(R.id.separator_1_2),
 			view.findViewById(R.id.separator_2_1),

src/io/github/sspanak/tt9/ui/main/keys/SoftKey.java

@@ -136,7 +136,6 @@ public class SoftKey extends androidx.appcompat.widget.AppCompatButton implement
 		int keyId = getId();
 
 		if (keyId == R.id.soft_key_add_word) return tt9.onKeyAddWord();
-		if (keyId == R.id.soft_key_clear_filter) return tt9.onKeyFilterClear();
 		if (keyId == R.id.soft_key_filter_suggestions) return tt9.onKeyFilterSuggestions(repeat);
 		if (keyId == R.id.soft_key_left_arrow) return tt9.onKeyPreviousSuggestion();
 		if (keyId == R.id.soft_key_right_arrow) return tt9.onKeyNextSuggestion();

src/io/github/sspanak/tt9/ui/main/keys/SoftNumberKey.java

@@ -28,13 +28,13 @@ public class SoftNumberKey extends SoftKey {
 
 	@Override
 	protected boolean handleHold() {
-		if (tt9 == null || tt9.getInputMode() != InputMode.MODE_123 || getId() != R.id.soft_key_0) {
+		if (tt9 == null) {
 			return super.handleHold();
 		}
 
 		preventRepeat();
-		int zeroCode = Key.numberToCode(0);
-		tt9.onKeyLongPress(zeroCode, new KeyEvent(KeyEvent.ACTION_DOWN, zeroCode));
+		int keyCode = Key.numberToCode(getNumber(getId()));
+		tt9.onKeyLongPress(keyCode, new KeyEvent(KeyEvent.ACTION_DOWN, keyCode));
 		return true;
 	}
 
@@ -95,11 +95,24 @@ public class SoftNumberKey extends SoftKey {
 			return "";
 		}
 
+		boolean isLatinBased = language.isLatinBased();
+		boolean isGreekBased = language.isGreek();
+
 		StringBuilder sb = new StringBuilder();
 		ArrayList<String> chars = language.getKeyCharacters(number, false);
 		for (int i = 0; i < 5 && i < chars.size(); i++) {
+			String currentLetter = chars.get(i);
+			if (
+				(isLatinBased && currentLetter.charAt(0) > 'z')
+				|| (isGreekBased && (currentLetter.charAt(0) < 'α' || currentLetter.charAt(0) > 'ω'))
+			) {
+				// As suggested by the community, there is no need to display the accented letters.
+				// People are used to seeing just A-Z.
+				continue;
+			}
+
 			sb.append(
-				tt9.getTextCase() == InputMode.CASE_UPPER ? chars.get(i).toUpperCase(language.getLocale()) : chars.get(i)
+				tt9.getTextCase() == InputMode.CASE_UPPER ? currentLetter.toUpperCase(language.getLocale()) : currentLetter
 			);
 		}