add touch suport for menu (#5)

main.js

@@ -651,9 +651,32 @@ class CalendarView extends ItemView
 		eventEl.addEventListener('mousedown', (e) => {
 			if (e.button == 2)
 			{
-				this.openMenu(e, event);
+				this.openMenu(event, {x: e.clientX, y: e.clientY});
 			}
-		})
+		});
+		eventEl.addEventListener('touchstart', (e) => {
+			if (e.touches.length == 1)
+			{
+				this.touchEvent = { "event": event, "location": {x: e.touches[0].clientX, y: e.touches[0].clientY}, "time": new Date().getTime() };
+				setTimeout(() => {
+					if (this.touchEvent != null && ((new Date().getTime() - this.touchEvent.time) > 900))
+					{
+						this.openMenu(this.touchEvent.event, this.touchEvent.location);
+						this.touchEvent = null;
+					}
+				}, 1000);
+			}
+			else
+			{
+				this.touchEvent = null;
+			}
+		});
+		eventEl.addEventListener('touchend', (e) => {
+			this.touchEvent = null;
+		});
+		eventEl.addEventListener('touchmove', (e) => {
+			this.touchEvent = null;
+		});
 		switch (event.type)
 		{
 			case 'task':
@@ -685,7 +708,7 @@ class CalendarView extends ItemView
 		return el;
 	}
 
-	openMenu(e, event)
+	openMenu(event, location)
 	{
 		let text = "";
 		Object.keys(event).forEach(key => {
@@ -698,7 +721,7 @@ class CalendarView extends ItemView
 			item.setTitle(text);
 		});
 
-		menu.showAtPosition({x: e.x, y: e.y});
+		menu.showAtPosition(location);
 	}
 }