GUI IVOutlineEvent handling exampleModel-view-controllerJTableMVC in JTableMore TypicalTableModelDefaultTableModelAbstractTableModelWhy a separate class?Handling ChangeOther ModelsEditing and RenderingExampleJTreeTreeModelTreeNodeEventsHomework #3db packagecore packagecmd packageui packageui package continuedAssignmentCommand Class New I/O MethodsExamineAdviceGUI IVIS 3135.8.2003OutlineEvent handling exampleModel-view-controllerJTableHomework #3Event handling exampleModel-view-controllerControllermanipulate-able interface modalityViewobservable interface displayModelunderlying data structureJTableMVC in JTableMore TypicalTableModel// Mandatoryint getColumnCount() int getRowCount() Object getValueAt(int rowIndex, int columnIndex) // For displayString getColumnName(int columnIndex) // For editingboolean isCellEditable(int rowIndex, int columnIndex) void setValueAt(Object aValue, int rowIndex, int columnIndex)// For renderingClass getColumnClass(int columnIndex) // For event handlingvoid addTableModelListener(TableModelListener l) void removeTableModelListener(TableModelListener l)DefaultTableModelVector of VectorsTo createDefaultTableModel(Object[ ][ ] data, Object[ ] columnNames) DefaultTableModel(Vector data, Vector columnNames) You can use the default table model implicitlynew JTable(Object[ ][ ] data, Object[ ] columnNames) new JTable(Vector data, Vector columnNames)AbstractTableModelSupplies default methods for most of the methodsSpecializers need implement onlyint getColumnCount() int getRowCount() Object getValueAt(int rowIndex, int columnIndex)Why a separate class?Efficiency 1no need to convert table to a different formEfficiency 2only generate those items that the user wants to seeModularityIsolate the form of data display from the data itselfHandling ChangeThe JTable needs to know when the model has changedTableModelListenerIf you have your own setValueAt methodyou must call fireTableCellUpdated (row, col)the JTable is a listenerOther ModelsTableColumnModelSeparate from the table dataColumns have their own display characteristicsvisible / hiddenwidthorderingListSelectionModelSelection is a set of intervalsIssue of “what is selected” can be complexTreeSelectionModelEditing and RenderingReturn a class with getColumnClassSome built-inBoolean = check-boxImageIcon = centered label containing the imageOtherwiseRegister an editor and/or renderer for that classtable.setCellEditor (Class, CellEditor)table.setDefaultRenderer (Class, Renderer)ExampleFlightTableModelJTreeTreeModel// essentialObject getRoot() Object getChild(Object parent, int index) int getChildCount(Object parent) int getIndexOfChild(Object parent, Object child) boolean isLeaf(Object node) // editabilityvoid valueForPathChanged(TreePath path, Object newValue) // event handlingvoid addTreeModelListener(TreeModelListener l) void removeTreeModelListener(TreeModelListener l)TreeNode// move downEnumeration children() TreeNode getChildAt(int childIndex) int getIndex(TreeNode node) int getChildCount() // move upTreeNode getParent() // statusboolean getAllowsChildren() boolean isLeaf()EventsTree expand/collapseTreeExpansionListenerNode selectionTreeSelectionListenerNode/tree modificationTreeModelListenerHomework #3FFGUIModeDifferencespackage structuredynamic command loadingautomatic path detectiongraphical interfacein-memory databasemust use JDK 1.4db packageClass related to data storage and retrievalFrequentFlyerDBmain class for interacting with the stored dataalso MemberDB and FlightDBMemberholds individual datahas miles valueFlightholds flight recordsMultiMapa utility class for a Map with multiple values for one keyDBUtilitieshome of various utility functionscore packageCommandMapmaps names to commandsloads commands at start upCommandSimpleCommandExitCommandHelpCommandMDatabaseCommand“M” indicates “memory” databasecmd packageAdding/deleting commandsMAddMemberCommandMAddFlightCommandMDeleteFlightCommandReporting commandsMShowMembersCommandMShowFlightsCommandFinding CommandsMFindByNameCommandMFindByLevelCommandMFindFlightsByMemberCommandUnknownCommandui packageFFTextModeFFGUIModeFFFramemenusCommandListenerexternal listener class for commandsPromptDialogdefault dialog for getting parameters for commandsResultDialogdefault dialog for displaying resultsui package continuedFlightDisplayDialogJTableFlightTableModelEnterLevelDialogCombo box for benefit levelEnterIdDialogAssignmentInput dialog for “add member”use appropriate componentsOutput dialog with a table of membersto be used by “show members”, “find by name”, “find by level”must use a table modelHelp dialogBut the set of commands is not fixed!Command ClassNew I/O MethodsgetParametersdetects modecalls getParametersText or getParametersGUIdefault implementations providedsubclasses must override getParametersGUI to display their own dialogsdisplayResultsdetects modecalls displayResultsText or displayResultsGUIdefault / must overrideExamineFFFrameCommandListenerMShowFlightsCommandMDeleteFlightCommandEnterIdDialogAdviceStart early!Draw your dialogs before implementingUse existing classes as