Fix AllDay events when it is shown on first draw

Author: Jesse Hoobergs

library/src/main/java/com/alamkanak/weekview/WeekView.java

@@ -524,7 +524,6 @@ private void drawHeaderRowAndEvents(Canvas canvas) {
                  dayNumber++) {
                 Calendar day = (Calendar) getFirstVisibleDay().clone();
                 day.add(Calendar.DATE, dayNumber);
-                int amountOfAllDayEvents=0;
                 for (int i = 0; i < mEventRects.size(); i++) {
 
                     if (isSameDay(mEventRects.get(i).event.getStartTime(), day) && mEventRects.get(i).event.isAllDay()) {
@@ -537,12 +536,21 @@ private void drawHeaderRowAndEvents(Canvas canvas) {
                 }
             }
         }
+        float newHeaderHeight;
         if(containsAllDayEvent) {
-            mHeaderHeight = mHeaderTextHeight + (mAllDayEventHeight + mHeaderMarginBottom);
+            newHeaderHeight = mHeaderTextHeight + (mAllDayEventHeight + mHeaderMarginBottom);
         }
         else{
-            mHeaderHeight = mHeaderTextHeight;
+            newHeaderHeight = mHeaderTextHeight;
         }
+        if(newHeaderHeight!=mHeaderHeight){
+            mHeaderHeight = newHeaderHeight;
+            invalidate();
+        }
+        else{
+            mHeaderHeight = newHeaderHeight;
+        }
+
         Calendar today = today();
 
         if (mAreDimensionsInvalid) {

sample/src/main/java/com/alamkanak/weekview/sample/BasicActivity.java

@@ -118,7 +118,7 @@ public List<? extends WeekViewEvent> onMonthChange(int newYear, int newMonth) {
 
         //AllDay event
         startTime = Calendar.getInstance();
-        startTime.set(Calendar.DAY_OF_MONTH, 6);
+        startTime.set(Calendar.DAY_OF_MONTH, 4);
         startTime.set(Calendar.HOUR_OF_DAY, 0);
         startTime.set(Calendar.MINUTE, 0);
         startTime.set(Calendar.MONTH, newMonth-1);