FORM is a container type, adding a wide variety of Item subclasses on the Form, forming a rich picture.
Form and other procedures:
Left (item.Layout_left)
Item.Layout_center
Leaning on right (item.Layout_Right)
SetLayout () Set / getLayout Get
Each Item has a Label property, setting to NULL representative Don't label. Getlabel () / setLabel ()
Item actual display size:
Minimum size (minimum size): at least the size of the components required for at least SETMINIMHEIGHT () / getMinImumwidth ()
Preferred size: optimal size setpreferredsize () / getpreferredsize ()
SetPreferRedsize (50, -1) width lock is 50
SetPreferRedsize (-1, 5) height locks 5
ITEM type
StringItem
ImageItem
Choicegroup
Textfield
Gauge
Datefield
StringItem
A string of words displayed with buttons or hyperlinks
Display display;
Form f = new form ("stringItem Test");
StringItem Si1 = New StringItem ("Test1:", "Content1", Item.plain;
F.Append (Si1); // INSERT () // delete () // set ()
Dislplay.setcurrent (f);
Constructor:
Three parameters: Label, Content, Style - Select: Plain, Button, HyperLink
Two parameters: equivalent to using the appearance of the Plain.
GetAppearanceMode () is used to get the look of StringItem.
GetFont () / setFont () is used to get / set the font.
GetText () / setText () is used to get / set content
ItemCommandListener (Item and Command)
There will be at least three things of Item subclasses:
Command array;
DefaultCommand variables, reference to a Command in a Command array;
Point reference to ItemMandListener.
Increase the COMMAND array must rely on addcommand () / removecommand ()
Set the reference to ItemMandilistener to use setItemCommandListener ()
Setting the defaultcommand must use setDefaultCommand ().
When we add Item to FORM, the Command array of the selected item will become the system menu item.
After any menu items are selected, the CommandAction () method in the class of the ItemMandListener interface is implemented will be called.
Si.AddCommand (New Command ("1", Command.Item, 1);
Si.Addcommand (New Command ("2", Command.Item, 1);
Si.setItemCommandListener (this);
......
Public void CommandAction (Command C, Item I)
{
System.out.println (c.getlabel ());
System.out.println (i.getlabel ());
}
ImageItem
Constructor:
Five-Parameters: Label, Imaging, and other proof, replace text, appearance - PLAIN, Button, Hyperlink. Four parameters: equivalent appearance is Plain.
Wait line:
ImageItem.Layout_Default
ImageItem.Layout_Left
ImageItem.Layout_Right
ImageItem.Layout_Center
ImageItem.Layout_Newline_Before
ImageItem.Layout_Newline_AFTER
SetLayout () / getLayout () setting / get the right
SetImage () / getImage () setting / get image object
SetaltText () / getAltText () setting / get replacement text
GetappearanceMode () gets the look.
Spacer
Designed to add blank interval in Formshang.
Display display;
StringItem Si = New StringItem ("Test", "Content", Item.plain;
F.Append (Si);
F.Append (New SACER (50, 50));
Display.setcurrent (f);
Choicegroup
And the List class is very similar, they all achieve the Choice interface. Different, ChoiceGroup must be useful in Form. It only
Choice.exClusive Choice.multiple kice.popup does not use Choice.Implicit.
Textfield
Similar to the TextBox class.
Gauge
Rod, progress bar.
Constructor:
Volume label name, can you interact, allowed maximum, initial value
GetMaxValue () / setMaxValue () get / set maximum
GetValue () / setValue () get / set the initial value at the time
Isinteractive () judgment can be interactive
Whether you can interact with false, you can only use the setValue () set value.
Whether you can interact = false and the maximum value allowed = gauge.indefinite can generate an unwanted Gauge.
Initial value selection:
Gauge.Continuous_Idle.Continuous_Idle.Continuous_Idle.Continuous
Gauge.Continuous_Running
Gauge.incremenTal_Idle.Increme
Gauge.incremental_Updating
Gauge as a progress display:
Alert Al = New Alert ("Processing");
......
Gauge G = New Gauge (NULL, FALSE, 10, 0);
Al.Setindicator (G);
......
Datefield
Date time component
Constructor:
Volume sign, input mode (--Datefield.date/datefield.time/datefield.date_time) ,JVA.UTIL.Timezone object
getInputMode () / setInputMode () to get / change the input mode
GetDate () / setdate () get / set the time specified by the user
Date objects must be equipped with Java.util.Calendar class.
When the internal state of the user interface component placed inside the FORM component changes, the Form component issues a message to all the itemStateChanged () method in the class that it registers it registered with the itemStateEndener () method. ItemStateListener is only called only when the component status is really changed in the user interaction. If you want to automatically call ItemStateChanged (): After a component status changes, call Item's NotifyStateChanged (), and the program can call ItemStateChanged () and return to the original call. There is no need to wait for the itemStateChanged () end to return. When there is a CommandListener and ItemStateListener, iTemStateChanged () is called first than CommandAction ().
