Class Picker

CodenameOne/src/com/codename1/ui/spinner/Picker.java:93–2255

///
/// @author Shai Almog
public class Picker extends Button {

    /// Whether useLightweightPopup should default to true, this can be set via
    /// the theme constant `lightweightPickerBool`
    private static boolean defaultUseLightweightPopup;
    private static boolean defaultLightweightModeSet;
    private int type = Display.PICKER_TYPE_DATE;
    private Object value = new Date();
    private boolean showMeridiem;
    private Object metaData;
    private Object renderingPrototype = "XXXXXXXXXXXXXX";
    private SimpleDateFormat formatter;
    private int preferredPopupWidth;
    private int preferredPopupHeight;
    private int minuteStep = 5;
    private int minHour = -1;
    private int maxHour = -1;
    private Date startDate;
    private Date endDate;
    private VirtualInputDevice currentInput;
    /// Supplies the initial date shown by the picker when no explicit value has
    /// been set via `setDate(Date)`. Resolved lazily each time the picker is
    /// opened (or `getDate()` is called against an unset picker) so it can
    /// depend on state that changes at runtime - e.g. a reminder picker whose
    /// default tracks "one hour before the current due date" can keep returning
    /// fresh values as the due date moves. Null means fall back to `new Date()`.
    private DateGetter defaultDateGetter;
    /// True once the picker's date has been pinned by an explicit `setDate(...)`
    /// call (including `setDate(null)` to clear) or a successful user selection.
    /// While false the picker treats `value` as a placeholder and prefers
    /// `defaultDateGetter` (when set) as the displayed value, so callers can
    /// install a default after construction and still see it take effect. Once
    /// the caller has explicitly set a value - even `null` - `getDate()` returns
    /// exactly that value; the default getter only continues to seed the popup
    /// UI when the picker is opened with a `null` value. Issue #5024.
    private boolean dateValueExplicitlySet;

    // Variables to store the form's previous margins before showing
    // the popup dialog so that we can restore them when the popup is disposed.
    private byte[] tmpContentPaneMarginUnit;
    private float tmpContentPaneBottomMargin;
    /// Flag to indicate that the picker should prefer lightweight components
    /// rather than native components.
    private boolean useLightweightPopup;
    private Runnable stopEditingCallback;
    private boolean suppressPaint;
    private final ArrayList<LightweightPopupButton> lightweightPopupButtons = new ArrayList<LightweightPopupButton>();
    /// While the lightweight popup is on screen this points at the live spinner widget
    /// so that setters propagate into the visible wheels and getters read the wheel
    /// position. Null whenever the popup is not showing.
    private InternalPickerWidget currentSpinner;
    /// Snapshot of `value` taken right before the lightweight popup is shown.
    /// Setter calls from custom popup buttons (e.g. a "+7 days" action that does
    /// `setDate(getDate() + 7d)`) stage their result into `value`, but if the user
    /// dismisses the popup with Cancel we roll `value` back to this snapshot so
    /// `getDate()` returns what the picker held before editing began. Non-null only
    /// while the popup is on screen.
    private Object preEditValue;