Swing (Java): differenze tra le versioni

Versione delle 02:04, 29 ago 2007

Versione delle 10:30, 14 ott 2007

Riga 120:

// viewed as a series of transparencies placed one above another in a overhead projector

// Swing typically places user components (such as buttons, etc.) in what it calls its

// 'content pane'. This pane is layer that is below most of the other (transparent) layers.

// So:layers.

// What are the layers for? Think of when you right-click on a control and it 'pops' a

// contextual menu 'over' the original control; or, when you press 'help' for a control or

// or hover the mouse for a 'tool tip' and the information is 'placed over the control'. How is that

// How is that done? By rendering the information in a layer 'above' the lower level
// 'content' pane. So:

// So:

// The standard way of adding a component to a 'multi-pane' container such as JFrame is by first

// establishing a reference to its 'content pane' (which is, by default just a JPanel with