彈出菜單表示可以在一個組件內(nèi)的指定位置動態(tài)彈出的菜單。
以下是聲明 javax.swing.JPopupMenu類：
public class JPopupMenu extends JComponent implements Accessible, MenuElement
| S.N. | 構(gòu)造函數(shù) & 描述 |
|---|---|
| 1 |
JPopupMenu() Constructs a JPopupMenu without an "invoker". |
| 2 |
JPopupMenu(String label) Constructs a JPopupMenu with the specified title. |
| S.N. | 方法 & 描述 |
|---|---|
| 1 |
JMenuItem add(Action a) Appends a new menu item to the end of the menu which dispatches the specified Action object. |
| 2 |
JMenuItem add(JMenuItem menuItem) Appends the specified menu item to the end of this menu. |
| 3 |
JMenuItem add(String s) Creates a new menu item with the specified text and appends it to the end of this menu. |
| 4 |
void addMenuKeyListener(MenuKeyListener l) Adds a MenuKeyListener to the popup menu. |
| 5 |
void addPopupMenuListener(PopupMenuListener l) Adds a PopupMenu listener. |
| 6 |
void addSeparator() Appends a new separator at the end of the menu. |
| 7 |
protected PropertyChangeListener createActionChangeListener(JMenuItem b) Returns a properly configured PropertyChangeListener which updates the control as changes to the Action occur. |
| 8 |
protected JMenuItem createActionComponent(Action a) Factory method which creates the JMenuItem for Actions added to the JPopupMenu. |
| 9 |
protected void firePopupMenuCanceled() Notifies PopupMenuListeners that this popup menu is cancelled. |
| 10 |
protected void firePopupMenuWillBecomeInvisible() Notifies PopupMenuListeners that this popup menu will become invisible. |
| 11 |
protected void firePopupMenuWillBecomeVisible() Notifies PopupMenuListeners that this popup menu will become visible. |
| 12 |
AccessibleContext getAccessibleContext() Gets the AccessibleContext associated with this JPopupMenu. |
| 13 |
Component getComponent() Returns this JPopupMenu component. |
| 14 |
Component getComponentAtIndex(int i) Deprecated. replaced by Container.getComponent(int) |
| 15 |
int getComponentIndex(Component c) Returns the index of the specified component. |
| 16 |
static boolean getDefaultLightWeightPopupEnabled() Gets the defaultLightWeightPopupEnabled property, which by default is true. |
| 17 |
Component getInvoker() Returns the component which is the 'invoker' of this popup menu. |
| 18 |
String getLabel() Returns the popup menu's label |
| 19 |
Insets getMargin() Returns the margin, in pixels, between the popup menu's border and its containees. |
| 20 |
MenuKeyListener[] getMenuKeyListeners() Returns an array of all the MenuKeyListeners added to this JPopupMenu with addMenuKeyListener(). |
| 21 |
PopupMenuListener[] getPopupMenuListeners() Returns an array of all the PopupMenuListeners added to this JMenuItem with addPopupMenuListener(). |
| 22 |
SingleSelectionModel getSelectionModel() Returns the model object that handles single selections. |
| 23 |
MenuElement[] getSubElements() Returns an array of MenuElements containing the submenu for this menu component. |
| 24 |
PopupMenuUI getUI() Returns the look and feel (L&F) object that renders this component. |
| 25 |
String getUIClassID() Returns the name of the L&F class that renders this component. |
| 26 |
void insert(Action a, int index) Inserts a menu item for the specified Action object at a given position. |
| 27 |
void insert(Component component, int index) Inserts the specified component into the menu at a given position. |
| 28 |
boolean isBorderPainted() Checks whether the border should be painted. |
| 29 |
boolean isLightWeightPopupEnabled() Gets the lightWeightPopupEnabled property. |
| 30 |
boolean isPopupTrigger(MouseEvent e) Returns true if the MouseEvent is considered a popup trigger by the JPopupMenu's currently installed UI. |
| 31 |
boolean isVisible() Returns true if the popup menu is visible (currently being displayed). |
| 32 |
void menuSelectionChanged(boolean isIncluded) Messaged when the menubar selection changes to activate or deactivate this menu. |
| 33 |
void pack() Lays out the container so that it uses the minimum space needed to display its contents. |
| 34 |
protected void paintBorder(Graphics g) Paints the popup menu's border if the borderPainted property is true. |
| 35 |
protected String paramString() Returns a string representation of this JPopupMenu. |
| 36 |
protected void processFocusEvent(FocusEvent evt) Processes focus events occurring on this component by dispatching them to any registered FocusListener objects. |
| 37 |
protected void processKeyEvent(KeyEvent evt) Processes key stroke events such as mnemonics and accelerators. |
| 38 |
void processKeyEvent(KeyEvent e, MenuElement[] path, MenuSelectionManager manager) Processes a key event forwarded from the MenuSelectionManager and changes the menu selection, if necessary, by using MenuSelectionManager's API. |
| 39 |
void processMouseEvent(MouseEvent event, MenuElement[] path, MenuSelectionManager manager) This method is required to conform to the MenuElement interface, but it not implemented. |
| 40 |
void remove(int pos) Removes the component at the specified index from this popup menu. |
| 41 |
void removeMenuKeyListener(MenuKeyListener l) Removes a MenuKeyListener from the popup menu. |
| 42 |
void removePopupMenuListener(PopupMenuListener l) Removes a PopupMenu listener. |
| 43 |
void setBorderPainted(boolean b) Sets whether the border should be painted. |
| 44 |
static void setDefaultLightWeightPopupEnabled(boolean aFlag) Sets the default value of the lightWeightPopupEnabled property. |
| 45 |
void setInvoker(Component invoker) Sets the invoker of this popup menu -- the component in which the popup menu menu is to be displayed. |
| 46 |
void setLabel(String label) Sets the popup menu's label. |
| 47 |
void setLightWeightPopupEnabled(boolean aFlag) Sets the value of the lightWeightPopupEnabled property, which by default is true. |
| 48 |
void setLocation(int x, int y) Sets the location of the upper left corner of the popup menu using x, y coordinates. |
| 49 |
void setPopupSize(Dimension d) Sets the size of the Popup window using a Dimension object. |
| 50 |
void setPopupSize(int width, int height) Sets the size of the Popup window to the specified width and height. |
| 51 |
void setSelected(Component sel) Sets the currently selected component, This will result in a change to the selection model. |
| 52 |
void setSelectionModel(SingleSelectionModel model) Sets the model object to handle single selections. |
| 53 |
void setUI(PopupMenuUI ui) Sets the L&F object that renders this component. |
| 54 |
void setVisible(boolean b) Sets the visibility of the popup menu. |
| 55 |
void show(Component invoker, int x, int y) Displays the popup menu at the position x,y in the coordinate space of the component invoker. |
