Feature - Long Click Listener

library/src/main/java/com/prolificinteractive/materialcalendarview/CalendarPagerView.java

@@ -21,7 +21,7 @@
 import static com.prolificinteractive.materialcalendarview.MaterialCalendarView.showOtherMonths;
 import static java.util.Calendar.DATE;
 
-abstract class CalendarPagerView extends ViewGroup implements View.OnClickListener {
+abstract class CalendarPagerView extends ViewGroup implements View.OnClickListener, View.OnLongClickListener {
 
     protected static final int DEFAULT_DAYS_IN_WEEK = 7;
     protected static final int DEFAULT_MAX_WEEKS = 6;
@@ -77,6 +77,7 @@ protected void addDayView(Collection<DayView> dayViews, Calendar calendar) {
         CalendarDay day = CalendarDay.from(calendar);
         DayView dayView = new DayView(getContext(), day);
         dayView.setOnClickListener(this);
+        dayView.setOnLongClickListener(this);
         dayViews.add(dayView);
         addView(dayView, new LayoutParams());
 
@@ -203,13 +204,23 @@ protected void invalidateDecorators() {
     }
 
     @Override
-    public void onClick(View v) {
+    public void onClick(final View v) {
         if (v instanceof DayView) {
             final DayView dayView = (DayView) v;
             mcv.onDateClicked(dayView);
         }
     }
 
+    @Override
+    public boolean onLongClick(final View v) {
+        if (v instanceof DayView) {
+            final DayView dayView = (DayView) v;
+            mcv.onDateLongClicked(dayView);
+            return true;
+        }
+        return false;
+    }
+
     /*
      * Custom ViewGroup Code
      */

library/src/main/java/com/prolificinteractive/materialcalendarview/MaterialCalendarView.java

@@ -221,6 +221,7 @@ public void onPageScrolled(int position, float positionOffset, int positionOffse
     private CalendarDay maxDate = null;
 
     private OnDateSelectedListener listener;
+    private OnDateLongClickListener longClickListener;
     private OnMonthChangedListener monthListener;
     private OnRangeSelectedListener rangeListener;
 
@@ -1372,6 +1373,15 @@ public void setOnDateChangedListener(OnDateSelectedListener listener) {
         this.listener = listener;
     }
 
+    /**
+     * Sets the listener to be notified upon long clicks on dates.
+     *
+     * @param longClickListener thing to be notified
+     */
+    public void setOnDateLongClickListener(OnDateLongClickListener longClickListener) {
+        this.longClickListener = longClickListener;
+    }
+
     /**
      * Sets the listener to be notified upon month changes.
      *
@@ -1406,9 +1416,8 @@ public void setOnTitleClickListener(final OnClickListener listener) {
      * @param selected true if the day is now currently selected, false otherwise
      */
     protected void dispatchOnDateSelected(final CalendarDay day, final boolean selected) {
-        OnDateSelectedListener l = listener;
-        if (l != null) {
-            l.onDateSelected(MaterialCalendarView.this, day, selected);
+        if (listener != null) {
+            listener.onDateSelected(MaterialCalendarView.this, day, selected);
         }
     }
 
@@ -1446,9 +1455,8 @@ protected void dispatchOnRangeSelected(final CalendarDay firstDay, final Calenda
      * @param day first day of the new month
      */
     protected void dispatchOnMonthChanged(final CalendarDay day) {
-        OnMonthChangedListener l = monthListener;
-        if (l != null) {
-            l.onMonthChanged(MaterialCalendarView.this, day);
+        if (monthListener != null) {
+            monthListener.onMonthChanged(MaterialCalendarView.this, day);
         }
     }
 
@@ -1536,6 +1544,17 @@ protected void onDateClicked(final DayView dayView) {
 
     }
 
+    /**
+     * Call by {@link CalendarPagerView} to indicate that a day was long clicked and we should handle it
+     *
+     * @param dayView
+     */
+    protected void onDateLongClicked(final DayView dayView) {
+        if (longClickListener != null) {
+            longClickListener.onDateLongClick(MaterialCalendarView.this, dayView.getDate());
+        }
+    }
+
     /**
      * Called by the adapter for cases when changes in state result in dates being unselected
      *

library/src/main/java/com/prolificinteractive/materialcalendarview/OnDateLongClickListener.java

@@ -0,0 +1,18 @@
+package com.prolificinteractive.materialcalendarview;
+
+import android.support.annotation.NonNull;
+
+/**
+ * The callback used to indicate a date has been long clicked.
+ */
+public interface OnDateLongClickListener {
+
+    /**
+     * Called when a user long clicks on a day.
+     * There is no logic to prevent multiple calls for the same date and state.
+     *
+     * @param widget the view associated with this listener
+     * @param date   the date that was long clicked.
+     */
+    void onDateLongClick(@NonNull MaterialCalendarView widget, @NonNull CalendarDay date);
+}

sample/src/main/java/com/prolificinteractive/materialcalendarview/sample/BasicActivity.java

@@ -6,10 +6,8 @@
 import android.support.v7.app.AppCompatActivity;
 import android.widget.TextView;
 
-import com.prolificinteractive.materialcalendarview.CalendarDay;
-import com.prolificinteractive.materialcalendarview.MaterialCalendarView;
-import com.prolificinteractive.materialcalendarview.OnDateSelectedListener;
-import com.prolificinteractive.materialcalendarview.OnMonthChangedListener;
+import android.widget.Toast;
+import com.prolificinteractive.materialcalendarview.*;
 
 import java.text.DateFormat;
 import java.text.SimpleDateFormat;
@@ -20,7 +18,7 @@
 /**
  * Shows off the most basic usage
  */
-public class BasicActivity extends AppCompatActivity implements OnDateSelectedListener, OnMonthChangedListener {
+public class BasicActivity extends AppCompatActivity implements OnDateSelectedListener, OnMonthChangedListener, OnDateLongClickListener {
 
     private static final DateFormat FORMATTER = SimpleDateFormat.getDateInstance();
 
@@ -37,28 +35,27 @@ protected void onCreate(Bundle savedInstanceState) {
         ButterKnife.bind(this);
 
         widget.setOnDateChangedListener(this);
+        widget.setOnDateLongClickListener(this);
         widget.setOnMonthChangedListener(this);
 
         //Setup initial text
-        textView.setText(getSelectedDatesString());
+        textView.setText("No Selection");
     }
 
     @Override
-    public void onDateSelected(@NonNull MaterialCalendarView widget, @Nullable CalendarDay date, boolean selected) {
-        textView.setText(getSelectedDatesString());
+    public void onDateSelected(@NonNull MaterialCalendarView widget, @NonNull CalendarDay date, boolean selected) {
+        textView.setText(selected ? FORMATTER.format(date.getDate()) : "No Selection");
+    }
+
+    @Override
+    public void onDateLongClick(@NonNull MaterialCalendarView widget, @NonNull CalendarDay date) {
+        final String text = String.format("%s is available", FORMATTER.format(date.getDate()));
+        Toast.makeText(this, text, Toast.LENGTH_SHORT).show();
     }
 
     @Override
     public void onMonthChanged(MaterialCalendarView widget, CalendarDay date) {
         //noinspection ConstantConditions
         getSupportActionBar().setTitle(FORMATTER.format(date.getDate()));
     }
-
-    private String getSelectedDatesString() {
-        CalendarDay date = widget.getSelectedDate();
-        if (date == null) {
-            return "No Selection";
-        }
-        return FORMATTER.format(date.getDate());
-    }
 }

sample/src/main/java/com/prolificinteractive/materialcalendarview/sample/DynamicSettersActivity.java

@@ -18,15 +18,20 @@
 import com.prolificinteractive.materialcalendarview.CalendarMode;
 import com.prolificinteractive.materialcalendarview.MaterialCalendarView;
 
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
 import java.util.Calendar;
 import java.util.Random;
 
 import butterknife.BindView;
 import butterknife.ButterKnife;
 import butterknife.OnCheckedChanged;
 import butterknife.OnClick;
+import com.prolificinteractive.materialcalendarview.OnDateLongClickListener;
 
-public class DynamicSettersActivity extends AppCompatActivity {
+public class DynamicSettersActivity extends AppCompatActivity implements OnDateLongClickListener {
+
+    private static final DateFormat FORMATTER = SimpleDateFormat.getDateInstance();
 
     @BindView(R.id.calendarView)
     MaterialCalendarView widget;
@@ -48,10 +53,11 @@ protected void onCreate(Bundle savedInstanceState) {
         widget.setOnTitleClickListener(new View.OnClickListener() {
             @Override
             public void onClick(final View view) {
-                Toast.makeText(DynamicSettersActivity.this, R.string.today, Toast.LENGTH_SHORT)
-                        .show();
+                Toast.makeText(DynamicSettersActivity.this, R.string.today, Toast.LENGTH_SHORT).show();
             }
         });
+
+        widget.setOnDateLongClickListener(this);
     }
 
     @OnClick(R.id.button_other_dates)
@@ -328,4 +334,9 @@ public static void showDatePickerDialog(Context context, CalendarDay day,
         );
         dialog.show();
     }
+
+    @Override
+    public void onDateLongClick(@NonNull MaterialCalendarView widget, @NonNull CalendarDay date) {
+        Toast.makeText(this, FORMATTER.format(date.getDate()), Toast.LENGTH_SHORT).show();
+    }
 }