Java Swing Flashcards
What kind of structure is Swing written in?
Container
What is Swing?
A GUI Widget Toolkit
What is AWT?
Abstract Window toolkit
Weight of AWT vs Swing?
Heavy vs Light-weight
Look and feel of AWT vs Swing?
Native vs Pluggable
MVC support for AWT vs Swing?
no support vs support
Component platform dependence AWT vs Swing
platform dependent vs. platform independence
Packages AWT vs. Swing
java.awt package vs javax.swing
Speed AWT vs Swing
Slower vs Faster
Event-Driven Programs
Some objects generate events and other objects respond to them
What kind of pattern is a Menu?
Composite, Menu made up of menu items
Absolute Layout
Graph Paper approach have to put everything on with coordinates
Example of Absolute Layout
Null Layout
Relative Layout
Components positioned relative to each other rather than absolute. Also field expands buttons and fields adjust location
Pros and Con of Relative Layout
pro- better than absolute
con - fairly inflexible
Example of Relative Layout
Flow Layout
Template Layout
Divide the container into sections and place one component in each section
Pros and Cons of Template Layout
Pro - easy to use
Con - the right template may not exist
Examples of Template Layout (3)
Grid Layout
Box Layout
Border Layout
Box Layout
One row or column only
Struct
One dimensional filler that is fixed
Rigid Areas
2 dimensional filler fixed
Glue
1 dimensional filler, variable in size
Border Layout
North south east west center
Example of event generators
Mouse clicks, timing signals, key presses
Event Generators
classes that can generate events of different kids
Event Receivers
Classes that respond to events of different kinds
Discribe the event design
An event is generated by an EventGenerator, then the event is posted to the EventQueue, finally, the EventReceiver will respond to the event once the EventQuenue fires it to the reciever
Event Queue responsibility
It is a central repository of events that ensures that everything happens in the right order
Event Dispatch Thread
Events dispatched here, can call invokeAnWait, or invoke Later
JButton
implemenets ActionListener
actionPreformed()
JCheckBox
Can select multiple items
ItemListener
JRadioButton
ButtonGroup deselects box when new one is selected
ItemListener
TextComponenets
DocumentEvent responds to changes in model
actionEvent when enter is pressed
Examples of TextComponenets
JTextField
JTextArea
JList
No support of scrolling
Lists things you can click on
ListSelectionListener
JComboBox
Combo of JTextField and JList
Item or ActionLIstener
can select but from a drop down, and can also type in new responses
JSlider
ChangeEvent
ChangeListener
stateChanged
Hierarchical Template Layout
subdivide sections in a template layout using a Composite pattern
Pros and cons of Hierarchial Template Layout
Pro - platform independent and flexible
Con - difficult to get used to
Scrollable Componenets
Controls how much can see from the viewport
Docking Toolbars
Container that can be responsitioned, JToolBar
Borders
Visually group components, created using BorderFactory
Constrained Template Layout
Add constraints to any template
GridBagLayout
Layered Layout
Different layouts on top of each other
