1. CPSC 233 Tutorial Xin Apr 6, 2011

2. Reading files An example available on my website pages.cpsc.ucalgary.ca/~liuxin

3. Layout manager describe how components are arranged Add a layout manager to Jframe eg., framWindow.setLayout(new BorderLayout()); Designate positions in the add() method eg., add(button, BorderLayout.SOUTH); Java build-in layout mangers BorderLayout, GridLayout, GridBagLayout, etc.

4. BorderLayout Place components into five regions NORTH, SOUTH, EAST, WEST, CENTER add(button, BorderLayout.SOUTH) BorderLayout.NORTH BorderLayout.WE ST BorderLayout.EA ST BorderLayout.SOUTH

5. FlowLayout Arranges components one after the other from left to right in the order in which components are added

6. GridLayout Arrages components in a 2D grid. (0, 0)(0, 1)(0, 2)(0, 3) (1, 0)(1, 1)(1, 2)(1, 3) (2, 0)(2, 1)(2, 2)(2, 3)

7. Grid Bag Layout A flexible and powerful layout manager. places components in a 2D grid Allow specified components to span multiple rows or columns Uses components’ preferred sizes to determine how big the cells should be A good online tutorial: http://download.oracle.com/javase/tutorial/uiswin g/layout/gridbag.html http://download.oracle.com/javase/tutorial/uiswin g/layout/gridbag.html

8. An example from Sun http://download.oracle.com/javase/tutorial/uiswin g/layout/gridbag.html http://download.oracle.com/javase/tutorial/uiswin g/layout/gridbag.html

9. Work with GridBagLayout Specifying constraints with GridBagConstraints frameWindow.setLayout (new GridBagLayout()); GridBagConstraints c = new GridBagConstraints(); //For each component to be added to this container: //...Create the component... //...Set instance variables in the GridBagConstraints instance... pane.add(theComponent, c);

10. GridBagConstraints Attributes to set up gridx, gridy gridwidth, gridheight fill NONE, HORIZONTAL, VERTICAL, or BOTH ipadx, ipady internal padding insects external padding anchor CENTER, PAGE_START, PAGE_END, … weightx, weighty determine how to distribute space among columns and rows

11. James’ Example For your in-class practice