You can show the bubble for a background cell using this undocumented method. Please note that the API may change in the future.
var cell = {};
cell.calendar = calendar; // use ClientObjectName, works for Scheduler and Month as well
cell.start = start; // DayPilot.Date
cell.end = end; // DayPilot.Date
cell.resource = res; // resource id, can be null
cell.toJSON = function() {
var json = {};
json.start = this.start;
json.end = this.end;
json.resource = this.resource;
return json;
};
// if staticBubbleHTML() is defined the bubble will show its result instead of calling the server
cell.staticBubbleHTML = function() {
return "Details";
}
bubble.showCell(cell);
The bubble will be displayed at the current mouse position.