Add new color scheme settings page

app/build.gradle

@@ -70,6 +70,7 @@ dependencies {
     implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.4.0'
     implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0'
     implementation 'androidx.preference:preference:1.2.0'
+    implementation 'androidx.gridlayout:gridlayout:1.0.0'
     implementation "androidx.room:room-runtime:$room_version"
     annotationProcessor "androidx.room:room-compiler:$room_version"
 

app/src/main/java/com/ashuh/nusmoduleplanner/settings/ColorSchemePreference.java

@@ -0,0 +1,97 @@
+package com.ashuh.nusmoduleplanner.settings;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.util.AttributeSet;
+import android.util.TypedValue;
+import android.view.Gravity;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.gridlayout.widget.GridLayout;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceViewHolder;
+
+import com.ashuh.nusmoduleplanner.R;
+import com.ashuh.nusmoduleplanner.common.util.ColorScheme;
+import com.ashuh.nusmoduleplanner.timetable.presentation.TimetableView;
+
+public class ColorSchemePreference extends Preference {
+    private static final int MARGIN_DP = 4;
+
+    private final TimetableSampleDataLoader loader = new TimetableSampleDataLoader();
+    private ColorScheme colorScheme;
+
+    public ColorSchemePreference(@NonNull Context context, @Nullable AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    @Nullable
+    @Override
+    protected Object onGetDefaultValue(@NonNull TypedArray a, int index) {
+        return a.getString(index);
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull PreferenceViewHolder holder) {
+        TimetableView timetableView = (TimetableView) holder.findViewById(R.id.timetable);
+        GridLayout gridLayout = (GridLayout) holder.findViewById(R.id.grid);
+
+        if (gridLayout.getChildCount() == 0) {
+            timetableView.setWeekViewLoader(loader);
+
+            for (int i = 0; i < ColorScheme.values().length; i++) {
+                ColorScheme colorScheme = ColorScheme.values()[i];
+                ColorSchemeView colorSchemeView = generateColorSchemeView(colorScheme, i);
+                gridLayout.addView(colorSchemeView);
+            }
+        } else {
+            for (int i = 0; i < gridLayout.getChildCount(); i++) {
+                ColorSchemeView child = (ColorSchemeView) gridLayout.getChildAt(i);
+                child.setSelected(this.colorScheme == child.getColorScheme());
+            }
+        }
+
+        loader.setColorScheme(colorScheme);
+        timetableView.notifyDatasetChanged();
+    }
+
+    @Override
+    protected void onSetInitialValue(@Nullable Object defaultValue) {
+        ColorScheme colorScheme = ColorScheme.valueOf(getPersistedString((String) defaultValue));
+        setColorScheme(colorScheme);
+    }
+
+    private ColorSchemeView generateColorSchemeView(ColorScheme colorScheme, int index) {
+        ColorSchemeView colorSchemeView = new ColorSchemeView(getContext());
+        colorSchemeView.setColorScheme(colorScheme);
+        colorSchemeView.setLayoutParams(getLayoutParams(index));
+        colorSchemeView.setSelected(this.colorScheme == colorScheme);
+        colorSchemeView.setOnClickListener(v -> setColorScheme(colorScheme));
+        return colorSchemeView;
+    }
+
+    private GridLayout.LayoutParams getLayoutParams(int index) {
+        GridLayout.LayoutParams param = new GridLayout.LayoutParams();
+        param.columnSpec = GridLayout.spec(index % 2, GridLayout.FILL, 1);
+        param.rowSpec = GridLayout.spec(index / 2, GridLayout.FILL, 1);
+        param.setGravity(Gravity.FILL_HORIZONTAL);
+        int marginPx = getMarginPx();
+        param.setMargins(marginPx, marginPx, marginPx, marginPx);
+        return param;
+    }
+
+    private void setColorScheme(@NonNull ColorScheme colorScheme) {
+        this.colorScheme = colorScheme;
+        persistString(colorScheme.name());
+        notifyChanged();
+    }
+
+    private int getMarginPx() {
+        return (int) TypedValue.applyDimension(
+                TypedValue.COMPLEX_UNIT_DIP,
+                MARGIN_DP,
+                getContext().getResources().getDisplayMetrics()
+        );
+    }
+}

app/src/main/java/com/ashuh/nusmoduleplanner/settings/ColorSchemeSettingsFragment.java

@@ -0,0 +1,19 @@
+package com.ashuh.nusmoduleplanner.settings;
+
+import static com.ashuh.nusmoduleplanner.common.data.preferences.SharedPreferencesManager.PREFERENCE_FILE_KEY;
+
+import android.os.Bundle;
+
+import androidx.annotation.Nullable;
+import androidx.preference.PreferenceManager;
+
+import com.ashuh.nusmoduleplanner.R;
+
+public class ColorSchemeSettingsFragment extends NoMenuPreferenceFragment {
+    @Override
+    public void onCreatePreferences(@Nullable Bundle savedInstanceState, @Nullable String rootKey) {
+        PreferenceManager manager = getPreferenceManager();
+        manager.setSharedPreferencesName(PREFERENCE_FILE_KEY);
+        setPreferencesFromResource(R.xml.color_scheme_preferences, rootKey);
+    }
+}

app/src/main/java/com/ashuh/nusmoduleplanner/settings/ColorSchemeView.java

@@ -0,0 +1,79 @@
+package com.ashuh.nusmoduleplanner.settings;
+
+import static java.util.Objects.requireNonNull;
+
+import android.content.Context;
+import android.graphics.Color;
+import android.util.AttributeSet;
+import android.util.TypedValue;
+import android.view.View;
+import android.widget.FrameLayout;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import com.ashuh.nusmoduleplanner.R;
+import com.ashuh.nusmoduleplanner.common.util.ColorScheme;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class ColorSchemeView extends FrameLayout {
+    private static final int BOX_SIZE_DP = 20;
+
+    private ColorScheme colorScheme;
+
+    public ColorSchemeView(@NonNull Context context) {
+        super(context);
+        init(context);
+    }
+
+    private void init(Context context) {
+        View.inflate(context, R.layout.color_scheme_layout, this);
+        setClickable(true);
+        setBackgroundResource(R.drawable.color_scheme_btn);
+        TypedValue outValue = new TypedValue();
+        context.getTheme()
+                .resolveAttribute(android.R.attr.selectableItemBackground, outValue, true);
+    }
+
+    public ColorSchemeView(@NonNull Context context, @Nullable AttributeSet attrs) {
+        super(context, attrs);
+        init(context);
+    }
+
+    public ColorScheme getColorScheme() {
+        return colorScheme;
+    }
+
+    public void setColorScheme(@NonNull ColorScheme colorScheme) {
+        requireNonNull(colorScheme);
+        this.colorScheme = colorScheme;
+
+        List<Integer> colors = colorScheme.getColors().stream()
+                .map(Color::toArgb)
+                .collect(Collectors.toList());
+
+        TextView nameView = findViewById(R.id.name);
+        nameView.setText(colorScheme.toString());
+
+        LinearLayout colorsView = findViewById(R.id.colors);
+        colorsView.removeAllViews();
+
+        int px = (int) TypedValue.applyDimension(
+                TypedValue.COMPLEX_UNIT_DIP,
+                BOX_SIZE_DP,
+                getResources().getDisplayMetrics()
+        );
+
+        for (Integer s : colors) {
+            View a = new View(getContext());
+            a.setBackgroundColor(s);
+            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(px, px);
+            a.setLayoutParams(params);
+            colorsView.addView(a);
+        }
+    }
+}

app/src/main/java/com/ashuh/nusmoduleplanner/settings/NoMenuPreferenceFragment.java

@@ -0,0 +1,21 @@
+package com.ashuh.nusmoduleplanner.settings;
+
+import android.os.Bundle;
+import android.view.Menu;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.preference.PreferenceFragmentCompat;
+
+public abstract class NoMenuPreferenceFragment extends PreferenceFragmentCompat {
+    @Override
+    public void onPrepareOptionsMenu(@NonNull Menu menu) {
+        menu.clear();
+    }
+
+    @Override
+    public void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setHasOptionsMenu(true);
+    }
+}

app/src/main/java/com/ashuh/nusmoduleplanner/settings/SettingsFragment.java

@@ -3,47 +3,27 @@
 import static com.ashuh.nusmoduleplanner.common.data.preferences.SharedPreferencesManager.PREFERENCE_FILE_KEY;
 
 import android.os.Bundle;
-import android.view.Menu;
 
-import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
-import androidx.preference.ListPreference;
-import androidx.preference.PreferenceFragmentCompat;
+import androidx.navigation.Navigation;
+import androidx.preference.Preference;
 import androidx.preference.PreferenceManager;
 
 import com.ashuh.nusmoduleplanner.R;
-import com.ashuh.nusmoduleplanner.common.util.ColorScheme;
-
-import java.util.Arrays;
-
-public class SettingsFragment extends PreferenceFragmentCompat {
-    @Override
-    public void onPrepareOptionsMenu(@NonNull Menu menu) {
-        menu.clear();
-    }
-
-    @Override
-    public void onCreate(@Nullable Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setHasOptionsMenu(true);
-    }
 
+public class SettingsFragment extends NoMenuPreferenceFragment {
     @Override
     public void onCreatePreferences(@Nullable Bundle savedInstanceState, @Nullable String rootKey) {
         PreferenceManager manager = getPreferenceManager();
         manager.setSharedPreferencesName(PREFERENCE_FILE_KEY);
         setPreferencesFromResource(R.xml.preferences, rootKey);
-        ListPreference colorSchemePreference = findPreference("color_scheme");
-        assert colorSchemePreference != null;
 
-        ColorScheme[] colorSchemes = ColorScheme.values();
-        CharSequence[] entries = Arrays.stream(colorSchemes)
-                .map(ColorScheme::toString)
-                .toArray(CharSequence[]::new);
-        CharSequence[] entryValues = Arrays.stream(colorSchemes)
-                .map(ColorScheme::name)
-                .toArray(CharSequence[]::new);
-        colorSchemePreference.setEntries(entries);
-        colorSchemePreference.setEntryValues(entryValues);
+        Preference colorSchemePreference = findPreference("color_scheme");
+        assert colorSchemePreference != null;
+        colorSchemePreference.setOnPreferenceClickListener(preference -> {
+            Navigation.findNavController(requireActivity(), R.id.nav_host_fragment)
+                    .navigate(R.id.action_nav_settings_main_to_colorSchemeSettingsFragment);
+            return true;
+        });
     }
 }

app/src/main/java/com/ashuh/nusmoduleplanner/settings/TimetableSampleDataLoader.java

@@ -0,0 +1,102 @@
+package com.ashuh.nusmoduleplanner.settings;
+
+import androidx.annotation.NonNull;
+
+import com.ashuh.nusmoduleplanner.common.domain.model.module.lesson.LessonType;
+import com.ashuh.nusmoduleplanner.common.util.ColorScheme;
+import com.ashuh.nusmoduleplanner.timetable.presentation.model.UiTimetableLessonOccurrence;
+
+import org.threeten.bp.DayOfWeek;
+
+import java.util.List;
+
+import me.jlurena.revolvingweekview.DayTime;
+import me.jlurena.revolvingweekview.WeekView;
+import me.jlurena.revolvingweekview.WeekViewEvent;
+
+public class TimetableSampleDataLoader implements WeekView.WeekViewLoader {
+    private static final UiTimetableLessonOccurrence SAMPLE_COLOR_0_1
+            = UiTimetableLessonOccurrence.create(
+            "COM1-B113",
+            new DayTime(DayOfWeek.TUESDAY, 10, 0),
+            new DayTime(DayOfWeek.TUESDAY, 11, 0),
+            "CS3235",
+            LessonType.TUTORIAL,
+            "2", 0);
+
+    private static final UiTimetableLessonOccurrence SAMPLE_COLOR_0_2
+            = UiTimetableLessonOccurrence.create(
+            "COM1-B113",
+            new DayTime(DayOfWeek.TUESDAY, 14, 0),
+            new DayTime(DayOfWeek.TUESDAY, 16, 0),
+            "CS3235",
+            LessonType.LECTURE,
+            "1", 0);
+
+    private static final UiTimetableLessonOccurrence SAMPLE_COLOR_2
+            = UiTimetableLessonOccurrence.create(
+            "AS1-0207",
+            new DayTime(DayOfWeek.WEDNESDAY, 10, 0),
+            new DayTime(DayOfWeek.WEDNESDAY, 12, 0),
+            "GER1000",
+            LessonType.TUTORIAL,
+            "A19", 0);
+
+    private static final UiTimetableLessonOccurrence SAMPLE_COLOR_4
+            = UiTimetableLessonOccurrence.create(
+            "i3-Aud",
+            new DayTime(DayOfWeek.WEDNESDAY, 12, 0),
+            new DayTime(DayOfWeek.WEDNESDAY, 14, 0),
+            "CS2100",
+            LessonType.LECTURE,
+            "1", 0);
+
+    private static final UiTimetableLessonOccurrence SAMPLE_COLOR_6
+            = UiTimetableLessonOccurrence.create(
+            "BIZ2-0509",
+            new DayTime(DayOfWeek.MONDAY, 10, 0),
+            new DayTime(DayOfWeek.MONDAY, 13, 0),
+            "ACC1006",
+            LessonType.SECTIONAL,
+            "1", 0);
+
+    private static final UiTimetableLessonOccurrence SAMPLE_COLOR_7_1
+            = UiTimetableLessonOccurrence.create(
+            "i3-Aud",
+            new DayTime(DayOfWeek.MONDAY, 14, 0),
+            new DayTime(DayOfWeek.MONDAY, 16, 0),
+            "CS2108",
+            LessonType.LECTURE,
+            "1", 0);
+
+    private static final UiTimetableLessonOccurrence SAMPLE_COLOR_7_2
+            = UiTimetableLessonOccurrence.create(
+            "COM1-0208",
+            new DayTime(DayOfWeek.TUESDAY, 11, 0),
+            new DayTime(DayOfWeek.TUESDAY, 12, 0),
+            "CS2108",
+            LessonType.TUTORIAL,
+            "2", 0);
+
+    @Override
+    public List<? extends WeekViewEvent> onWeekViewLoad() {
+        return List.of(SAMPLE_COLOR_0_1, SAMPLE_COLOR_0_2, SAMPLE_COLOR_2, SAMPLE_COLOR_4,
+                SAMPLE_COLOR_6, SAMPLE_COLOR_7_1, SAMPLE_COLOR_7_2);
+    }
+
+    public void setColorScheme(@NonNull ColorScheme colorScheme) {
+        int color0 = colorScheme.getColor(new ColorScheme.Index(0)).toArgb();
+        int color2 = colorScheme.getColor(new ColorScheme.Index(2)).toArgb();
+        int color4 = colorScheme.getColor(new ColorScheme.Index(4)).toArgb();
+        int color6 = colorScheme.getColor(new ColorScheme.Index(6)).toArgb();
+        int color7 = colorScheme.getColor(new ColorScheme.Index(7)).toArgb();
+
+        SAMPLE_COLOR_0_1.setColor(color0);
+        SAMPLE_COLOR_0_2.setColor(color0);
+        SAMPLE_COLOR_2.setColor(color2);
+        SAMPLE_COLOR_4.setColor(color4);
+        SAMPLE_COLOR_6.setColor(color6);
+        SAMPLE_COLOR_7_1.setColor(color7);
+        SAMPLE_COLOR_7_2.setColor(color7);
+    }
+}