Fixed 'Tetris' calendar problem.

src/com/bradrydzewski/gwt/calendar/client/monthview/AppointmentLayoutDescription.java

@@ -0,0 +1,105 @@
+package com.bradrydzewski.gwt.calendar.client.monthview;
+
+import com.bradrydzewski.gwt.calendar.client.Appointment;
+
+/**
+ * Contains common properties and behavior for layout descriptions that can be
+ * "stacked" on top of each month view's week.
+ *
+ * @author Carlos D. Morales
+ */
+public class AppointmentLayoutDescription {
+   /**
+    * The layer order (in a stack-like arrangement)assigned to this description
+    * by the <code>AppointmentStackingManager</code> when arranging the
+    * descriptions on the top of a week.
+    */
+   private int stackOrder = 0;
+
+   /**
+    * The start day of the described <code>Appointment</code> when laid on the
+    * top of one of the weeks while visualizing a month through the
+    * <code>MonthView</code>.
+    */
+   private int fromWeekDay = 0;
+
+   /**
+    * The end day of the described <code>Appointment</code> when laid on the top
+    * of one of the weeks while visualizing a month through the
+    * <code>MonthView</code>.
+    */
+   private int toWeekDay = 0;
+
+   /**
+    * The underlying <code>Appointment</code> whose details will be displayed
+    * through the <code>MonthView</code>.
+    */
+   private Appointment appointment = null;
+
+
+   public AppointmentLayoutDescription(int fromWeekDay, int toWeekDay,
+      Appointment appointment) {
+      this.toWeekDay = toWeekDay;
+      this.fromWeekDay = fromWeekDay;
+      this.appointment = appointment;
+   }
+
+   public AppointmentLayoutDescription(int weekDay,
+      Appointment appointment) {
+      this(weekDay, weekDay, appointment);
+   }
+
+   public boolean overlapsWithRange(int from, int to) {
+      return fromWeekDay >= from && fromWeekDay <= to ||
+         fromWeekDay <= from && toWeekDay >= from;
+   }
+
+   public void setStackOrder(int stackOrder) {
+      this.stackOrder = stackOrder;
+   }
+
+   public int getStackOrder() {
+      return stackOrder;
+   }
+
+   public int getWeekStartDay() {
+      return fromWeekDay;
+   }
+
+   public int getWeekEndDay() {
+      return toWeekDay;
+   }
+
+   public boolean spansMoreThanADay() {
+      return fromWeekDay != toWeekDay;
+   }
+
+   public AppointmentLayoutDescription split() {
+      AppointmentLayoutDescription secondPart = null;
+		if (spansMoreThanADay()) {
+         secondPart =
+            new AppointmentLayoutDescription(fromWeekDay + 1, toWeekDay,
+                                                 appointment);
+         this.toWeekDay = this.fromWeekDay;
+		} else {
+         secondPart = this;
+      }
+      return secondPart;
+   }
+
+
+   public Appointment getAppointment() {
+      return appointment;
+   }
+
+   public void setAppointment(Appointment appointment) {
+      this.appointment = appointment;
+   }
+
+   @Override public String toString() {
+		return "AppointmentLayoutDescription{" + "stackOrder=" + stackOrder
+				+ ", fromWeekDay=" + fromWeekDay + ", toWeekDay=" + toWeekDay
+				+ ", appointment=[" + appointment.getTitle() + "]@"
+				+ appointment.hashCode() + '}';
+   }
+}