Class DatePicker
- java.lang.Object
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- java.awt.Component
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- java.awt.Container
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- javax.swing.JComponent
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- javax.swing.JPanel
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- com.github.lgooddatepicker.components.DatePicker
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- All Implemented Interfaces:
CustomPopup.CustomPopupCloseListener
,java.awt.image.ImageObserver
,java.awt.MenuContainer
,java.io.Serializable
,javax.accessibility.Accessible
public class DatePicker extends javax.swing.JPanel implements CustomPopup.CustomPopupCloseListener
DatePicker, This class implements a date picker GUI component. This class supports a complete set of "default functionality" without requiring any DatePickerSettings. However, the settings of a date picker can optionally be customized by creating a DatePickerSettings instance and passing it to the DatePicker constructor. After the date picker is constructed, the settings instance should not be changed. By default, the language and internationalization settings of a date picker are determined from the operating system defaults using Locale.getDefault(). If desired, the locale and language can be modified by passing a locale to the constructor of a DatePickerSettings instance, and passing that instance to the constructor of a DatePicker. Automatic Date Validation: Every date picker stores its current text, and its last valid date. The last valid date is returned when you call DatePicker.getDate(). If a person uses their keyboard to type into the text field, any text that is not a valid date will be displayed in red, any vetoed date will have a strikethrough, and any valid date will be displayed in black. Valid dates are automatically committed to the date picker. Any invalid or vetoed text is automatically reverted to the last valid date whenever the the date picker loses focus.// Basic usage example: // Create a date picker. DatePicker datePicker = new DatePicker(); // Create a panel, and add the date picker. JPanel panel = new JPanel(); panel.add(datePicker);
- See Also:
- Serialized Form
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Nested Class Summary
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Nested classes/interfaces inherited from class javax.swing.JPanel
javax.swing.JPanel.AccessibleJPanel
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Nested classes/interfaces inherited from class javax.swing.JComponent
javax.swing.JComponent.AccessibleJComponent
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Field Summary
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Fields inherited from class javax.swing.JComponent
listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW
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Constructor Summary
Constructors Constructor Description DatePicker()
Constructor with Default Values, Create a date picker instance using the default operating system locale and language, and default date picker settings.DatePicker(DatePickerSettings settings)
Constructor with Custom Settings, Create a date picker instance using the supplied date picker settings.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
addComponentListener(ComponentListener listener)
void
addDateChangeListener(DateChangeListener listener)
addDateChangeListener, This adds a date change listener to this date picker.void
clear()
clear, This will clear the date picker text.void
closePopup()
closePopup, This closes the calendar popup.Convert
convert()
convert, This is used to access the Convert class instance.protected void
fireComponentEvent(ComponentEvent e)
int
getBaseline(int width, int height)
getBaseline, This returns the baseline value of the dateTextField.javax.swing.JTextField
getComponentDateTextField()
getComponentDateTextField, Returns the date text field for this date picker.javax.swing.JButton
getComponentToggleCalendarButton()
getComponentToggleCalendarButton, Returns the "toggle calendar" button for this date picker.java.time.LocalDate
getDate()
getDate, This returns the last valid date, or returns null to represent an empty date.java.util.ArrayList<DateChangeListener>
getDateChangeListeners()
getDateChangeListeners, This returns a new ArrayList, that contains any date change listeners that are registered with this DatePicker.java.lang.String
getDateStringOrEmptyString()
getDateStringOrEmptyString, This returns the last valid date in an ISO-8601 formatted string "uuuu-MM-dd".java.lang.String
getDateStringOrSuppliedString(java.lang.String emptyDateString)
getDateStringOrSuppliedString, This returns the last valid date in an ISO-8601 formatted string "uuuu-MM-dd".DatePickerSettings
getSettings()
getSettings, This returns the date picker settings instance.java.lang.String
getText()
getText, This returns the current text that is present in the date picker text field.boolean
isDateAllowed(java.time.LocalDate date)
isDateAllowed, This checks to see if the specified date is allowed by any currently set veto policy, and allowed by the current setting of allowEmptyDates.boolean
isEnabled()
isEnabled, Returns true if this component is enabled, otherwise returns false.boolean
isPopupOpen()
isPopupOpen, This returns true if the calendar popup is open.boolean
isTextFieldValid()
isTextFieldValid, This returns true if, and only if, the text field contains a parsable date or a valid empty string.boolean
isTextValid(java.lang.String text)
isTextValid, This function can be used to see if the supplied text represents a "valid date" according to the settings of this date picker.void
openPopup()
openPopup, This opens the calendar popup.void
removeComponentListener(ComponentListener listener)
void
removeDateChangeListener(DateChangeListener listener)
removeDateChangeListener, This removes the specified date change listener from this date picker.void
setDate(java.time.LocalDate optionalDate)
setDate, This sets this date picker to the specified date.void
setDateToToday()
setDateToToday, This sets the date to today's date.void
setEnabled(boolean enabled)
setEnabled, This enables or disables the date picker.void
setLocale(java.util.Locale locale)
setLocale, The locale for a DatePicker should generally be set in the DatePickerSettings.void
setSettings(DatePickerSettings settings)
setSettings, This will set the settings instance for this date picker.void
setText(java.lang.String text)
setText, This sets the text of the date picker text field to the supplied value.void
setTextFieldToValidStateIfNeeded()
setTextFieldToValidStateIfNeeded, This function will check the contents of the text field, and when needed, will set the text to match the "last valid date" in a standardized valid format.void
togglePopup()
togglePopup, This creates and shows a calendar popup.java.lang.String
toString()
toString, This returns the last valid date in an ISO-8601 formatted string "uuuu-MM-dd".void
zDrawTextFieldIndicators()
zDrawTextFieldIndicators, This will draw the text field indicators, to indicate to the user the state of any text in the text field, including the validity of any date that has been typed.void
zEventCustomPopupWasClosed(CustomPopup popup)
zEventCustomPopupWasClosed, This is called automatically whenever the CustomPopup that is associated with this date picker is closed.-
Methods inherited from class javax.swing.JPanel
getAccessibleContext, getUI, getUIClassID, paramString, setUI, updateUI
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Methods inherited from class javax.swing.JComponent
addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBaselineResizeBehavior, getBorder, getBounds, getClientProperty, getComponentGraphics, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPopupLocation, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, hide, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingOrigin, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paint, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update
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Methods inherited from class java.awt.Container
add, add, add, add, add, addContainerListener, addImpl, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, getMousePosition, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setLayout, transferFocusDownCycle, validate, validateTree
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Methods inherited from class java.awt.Component
action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, requestFocus, requestFocus, requestFocusInWindow, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocation, setLocation, setMixingCutoutShape, setName, setSize, setSize, show, show, size, transferFocus, transferFocusBackward, transferFocusUpCycle
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Constructor Detail
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DatePicker
public DatePicker()
Constructor with Default Values, Create a date picker instance using the default operating system locale and language, and default date picker settings.
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DatePicker
public DatePicker(DatePickerSettings settings)
Constructor with Custom Settings, Create a date picker instance using the supplied date picker settings.
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Method Detail
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setSettings
public void setSettings(DatePickerSettings settings)
setSettings, This will set the settings instance for this date picker. The previous settings will be deleted. Note that calling this function effectively re-initializes the picker component. All aspects of the component will be changed to match the provided settings. Any currently selected date will not be changed by this function. If the popup calendar panel is open up the time that this function is called, the open calendar will not be changed by this function. Calendar panels showing the new settings will be displayed only after a new popup calendar panel is opened.
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addDateChangeListener
public void addDateChangeListener(DateChangeListener listener)
addDateChangeListener, This adds a date change listener to this date picker. For additional details, see the DateChangeListener class documentation.
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clear
public void clear()
clear, This will clear the date picker text. If the date picker is set to allow empty dates, then the last valid date will also be cleared. If the date picker is set to disallow empty dates, then the last valid date will not be changed by this function.
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closePopup
public void closePopup()
closePopup, This closes the calendar popup. The popup can close itself automatically, so this function does not generally need to be called programmatically. Notes: The popup can be automatically closed for various reasons. 1) The user may press escape. 2) The popup may lose focus. 3) The window may be moved. 4) The user may toggle the calendar with the "toggle calendar" button. 5) The user may select a date in the calendar.
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convert
public Convert convert()
convert, This is used to access the Convert class instance. The convert class allows the programmer to get or set the date picker java.time.LocalDate value using other common data types, such as java.util.Date. Example usage: datePicker.convert().getDateWithDefaultZone(); See the documentation of the Convert class for additional information and usage examples.
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getComponentToggleCalendarButton
public javax.swing.JButton getComponentToggleCalendarButton()
getComponentToggleCalendarButton, Returns the "toggle calendar" button for this date picker. Direct access to the calendar button is provided so that the programmer can optionally assign an image to the button, or perform advanced or unusual modifications to the date picker's appearance and behavior. Note: This function should not be used to programmatically open or close the date picker calendar. The following functions are provided for that purpose: openPopup(), closePopup(), and togglePopup().
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getBaseline
public int getBaseline(int width, int height)
getBaseline, This returns the baseline value of the dateTextField.- Overrides:
getBaseline
in classjavax.swing.JComponent
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getComponentDateTextField
public javax.swing.JTextField getComponentDateTextField()
getComponentDateTextField, Returns the date text field for this date picker. It is not expected that most programmers will need or want to use this function. Important Note: Direct access to the text field is provided so the programmer can perform advanced or unusual modifications of the date picker's appearance or behavior. However, this function should be used only as a last resort, to implement functionality that is not available from other functions or settings. The DatePickerSettings class provides multiple ways to customize the date picker text field, and those functions should be preferred for the needs they address. It is suggested that the programmer become familiar with the functions and settings in DatePickerSettings class before directly accessing the date picker text field. The DatePickerSettings class can customize the following text field attributes: The text field width, the background and foreground colors, the fonts, font size, and font colors, and the date formats. Warning: To ensure proper behavior of the date picker, the text field should not be used to get or set the the date (or text) values of the date picker. Instead, the programmer should use the DatePicker.getDate() and DatePicker.getText() (and Set) functions for those purposes. The DateChangeListener interface can be used to listen for changes to the date value.
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getDate
public java.time.LocalDate getDate()
getDate, This returns the last valid date, or returns null to represent an empty date. If "DatePickerSettings.allowEmptyDates" is true, then this can return null. If allow empty dates is false, then this can never return null. Note: If the automatic validation of date picker text has not yet occurred, then the the last valid date may not always match the current text.Additional Text Validation Details: Whenever the current date picker text is not valid, the value returned by getDate() will generally not match the date picker text. The date picker can contain invalid text whenever both items (1) and (2) below are true: 1) The user has manually typed text that cannot be parsed by the parsing formats into a valid date, or the user has typed a date that is vetoed by a current veto policy, or the user has cleared (or left only whitespace) in the text when allowEmptyDates is false. 2) The date picker text field has continued to have focus, and therefore the automatic validation (revert/commit) process has not yet occurred.
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getDateChangeListeners
public java.util.ArrayList<DateChangeListener> getDateChangeListeners()
getDateChangeListeners, This returns a new ArrayList, that contains any date change listeners that are registered with this DatePicker.
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getDateStringOrEmptyString
public java.lang.String getDateStringOrEmptyString()
getDateStringOrEmptyString, This returns the last valid date in an ISO-8601 formatted string "uuuu-MM-dd". For any CE years that are between 0 and 9999 inclusive, the output will have a fixed length of 10 characters. Years before or after that range will output longer strings. If the last valid date is empty, this will return an empty string ("").
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getDateStringOrSuppliedString
public java.lang.String getDateStringOrSuppliedString(java.lang.String emptyDateString)
getDateStringOrSuppliedString, This returns the last valid date in an ISO-8601 formatted string "uuuu-MM-dd". For any CE years that are between 0 and 9999 inclusive, the output will have a fixed length of 10 characters. Years before or after that range will output longer strings. If the last valid date is empty, this will return the value of emptyDateString.
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getSettings
public DatePickerSettings getSettings()
getSettings, This returns the date picker settings instance.
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getText
public java.lang.String getText()
getText, This returns the current text that is present in the date picker text field. This text can contain anything that was written by the user. It is specifically not guaranteed to contain a valid date. This should not be used to retrieve the date picker date. Instead, use DatePicker.getDate() for retrieving the date.
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isDateAllowed
public boolean isDateAllowed(java.time.LocalDate date)
isDateAllowed, This checks to see if the specified date is allowed by any currently set veto policy, and allowed by the current setting of allowEmptyDates. If allowEmptyDates is false, and the specified date is null, then this returns false. If a veto policy exists, and the specified date is vetoed, then this returns false. If the date is not vetoed, or if empty dates are allowed and the date is null, then this returns true.
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isEnabled
public boolean isEnabled()
isEnabled, Returns true if this component is enabled, otherwise returns false.- Overrides:
isEnabled
in classjava.awt.Component
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isPopupOpen
public boolean isPopupOpen()
isPopupOpen, This returns true if the calendar popup is open. This returns false if the calendar popup is closed
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isTextFieldValid
public boolean isTextFieldValid()
isTextFieldValid, This returns true if, and only if, the text field contains a parsable date or a valid empty string. Note that this does not guarantee that the text in the text field is in a standard format. Valid dates can be in any one of the parsingFormats that are accepted by the date picker. More specifically, this returns true if: 1) the text field contains a parsable date that exists, and that has not been vetoed by a current veto policy, OR 2) (allowEmptyDates == true) and dateTextField.getText().trim() contains an empty string. Otherwise returns false.
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isTextValid
public boolean isTextValid(java.lang.String text)
isTextValid, This function can be used to see if the supplied text represents a "valid date" according to the settings of this date picker. More specifically, this returns true if: 1) the text contains a parsable date that exists, and that has not been vetoed by a current veto policy, OR 2) (allowEmptyDates == true) and text.trim() contains an empty string. Otherwise returns false.
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openPopup
public void openPopup()
openPopup, This opens the calendar popup. If the date picker contains a lastValidDate, the calendar will be opened to the month and year of the lastValidDate, with the lastValidDate marked as selected. If the lastValidDate is null, then the calendar will be opened with today's month and year displayed, and no date will be selected. This function creates a new calendar and a new custom popup instance each time that it is called. The associated object instances are automatically disposed and set to null when a popup is closed.
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removeDateChangeListener
public void removeDateChangeListener(DateChangeListener listener)
removeDateChangeListener, This removes the specified date change listener from this date picker.
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setDate
public final void setDate(java.time.LocalDate optionalDate)
setDate, This sets this date picker to the specified date. Dates that are set from this function are processed through the same validation procedures as dates that are entered by the user. More specifically: The "veto policy" and "allowEmptyTimes" settings are used to determine whether or not a particular value is "allowed". Allowed values will be set in the text field, and also committed to the "last valid value". Disallowed values will be set in the text field (with a disallowed indicator font), but will not be committed to the "last valid value". A date value can be checked against any current veto policy, and against the allowEmptyDates setting, by calling isDateAllowed(). This can be used to determine (in advance), if a particular value would be allowed. Note: If empty dates are allowed, and the component does not have a veto policy, then all possible values will (always) be allowed. These are the default settings of this component. Implementation Note: Whenever the text field changes to a valid date string, the lastValidDate is also automatically set (unless the date is vetoed). This occurs through the DocumentListener which is registered on the dateTextField.
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setDateToToday
public void setDateToToday()
setDateToToday, This sets the date to today's date. This function is subject to the same validation behaviors as if a user typed today's date into the date picker. See setDate() for additional details.
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setEnabled
public void setEnabled(boolean enabled)
setEnabled, This enables or disables the date picker. When the date picker is enabled, dates can be selected by the user using any methods that are allowed by the current settings. When the date picker is disabled, there is no way for the user to interact with the component. More specifically, dates cannot be selected with the mouse, or with the keyboard, and the date picker components change their color scheme to indicate the disabled state. Any currently stored text and last valid date values are retained while the component is disabled.- Overrides:
setEnabled
in classjavax.swing.JComponent
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setLocale
public void setLocale(java.util.Locale locale)
setLocale, The locale for a DatePicker should generally be set in the DatePickerSettings. This function only exists to avoid confusion with the swing function Component.setLocale(). This forwards any function calls to: DatePicker.getSettings().setLocale(). For the complete Javadocs, see DatePickerSettings.setLocale().- Overrides:
setLocale
in classjava.awt.Component
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setText
public void setText(java.lang.String text)
setText, This sets the text of the date picker text field to the supplied value. This will have the same effect on the last valid date as if the user was typing into the text field. In other words, it may or may not change the last valid date. This should not be used to set the date of the date picker, instead use DatePicker.setDate().
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setTextFieldToValidStateIfNeeded
public void setTextFieldToValidStateIfNeeded()
setTextFieldToValidStateIfNeeded, This function will check the contents of the text field, and when needed, will set the text to match the "last valid date" in a standardized valid format. This function is automatically called whenever the date picker text field loses focus, or at other times when the text must be set to a valid state. It is not expected that the programmer will normally need to call this function directly. This function has two possible effects: 1) If the current text is already valid and is in the standard format, then this will do nothing. If the text is not valid, or if the text is not in the standard format, then: 2) This will replace the invalid text in the text field with a standard date field text string that matches the last valid date.
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toString
public java.lang.String toString()
toString, This returns the last valid date in an ISO-8601 formatted string "uuuu-MM-dd". For any CE years that are between 0 and 9999 inclusive, the output will have a fixed length of 10 characters. Years before or after that range will output longer strings. If the last valid date is empty, this will return an empty string (""). This returns the same value as getDateStringOrEmptyString().- Overrides:
toString
in classjava.awt.Component
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togglePopup
public void togglePopup()
togglePopup, This creates and shows a calendar popup. If the popup is already open, then this will close the popup. This is called when the user clicks on the toggle calendar button of the date picker. This function does not generally need to be called programmatically.
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zDrawTextFieldIndicators
public void zDrawTextFieldIndicators()
zDrawTextFieldIndicators, This will draw the text field indicators, to indicate to the user the state of any text in the text field, including the validity of any date that has been typed. The text field indicators include the text field background color, foreground color, font color, and font. Note: This function is called automatically by the date picker. Under most circumstances, the programmer will not need to call this function. List of possible text field states: DisabledComponent, ValidFullOrEmptyValue, UnparsableValue, VetoedValue, DisallowedEmptyValue.
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zEventCustomPopupWasClosed
public void zEventCustomPopupWasClosed(CustomPopup popup)
zEventCustomPopupWasClosed, This is called automatically whenever the CustomPopup that is associated with this date picker is closed. This should be called regardless of the type of event which caused the popup to close. Notes: The popup can be automatically closed for various reasons. 1) The user may press escape. 2) The popup may lose focus. 3) The window may be moved. 4) The user may toggle the calendar with the "toggle calendar" button. 5) The user may select a date in the calendar.- Specified by:
zEventCustomPopupWasClosed
in interfaceCustomPopup.CustomPopupCloseListener
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addComponentListener
public void addComponentListener(ComponentListener listener)
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removeComponentListener
public void removeComponentListener(ComponentListener listener)
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fireComponentEvent
protected void fireComponentEvent(ComponentEvent e)
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