public class Scheduler

A schedule on screen: the items of a ScheduleModel by day, week, month, as an agenda, or by resource.

long start = System.currentTimeMillis();
DefaultScheduleModel model = new DefaultScheduleModel();
model.addItem(new ScheduleItem("1", "Design review", start, start + TimeMath.HOUR));
Scheduler scheduler = new Scheduler(model);
scheduler.setView(Scheduler.View.WEEK);

Form form = new Form("Schedule", new BorderLayout());
form.add(BorderLayout.CENTER, scheduler);
form.show();

The same items by the day, by the month and against the people they are booked for:

The views draw their items and keep no component for each, so a schedule of thousands of items scrolls as one of ten does. Time zooms with a pinch or with the wheel and the control key held.

Editing

With a mouse an item is dragged to move it and by its edge to resize it, and a drag across empty time selects a range. On a touch screen a drag scrolls, so a long press picks an item up or starts a range, and the selected item has handles to resize it by. Every change is offered to the listeners first, then made through ScheduleModel#updateItem, and either may refuse. setEditable(false) makes the scheduler read only.

Pointer and motion

Under a mouse the item the pointer is over lights up, free time shows the slot a drag would start in, the cursor says what a drag would do, and a tooltip gives the item’s title and time. An item that is picked up lifts: a shadow comes up under it and the place it left dims. Let go, it glides from where it was dropped to where it belongs. Each takes under a quarter of a second.

setAnimationTime stops the clock these run by, for a screenshot or a test of a moment in the middle of one.

Styling

SchedulerGrid is the background, with its foreground the colour of the lines; SchedulerOffHours shades the time outside a WorkCalendar; SchedulerHeader, SchedulerHeaderToday and SchedulerTimeLabel are the headings; SchedulerItem, SchedulerBackgroundItem and SchedulerBlocked the items by kind; SchedulerNow the current time and SchedulerSelection a range being dragged out. The bar above the views is SchedulerToolbar, SchedulerTitle and SchedulerViewButton. An item that names a UIID of its own is painted with that one.