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formatted List class Typically, an implicit formatted List class is used to create a menu The commandAction() method is automatically called to process the menu selection without requiring the user to select a command to process the selection A List class is derived from the Screen class and does not require a container In contrast, the ChoiceGroup class is derived from the Item class and requires an instance of a Form class to contain the instance of the ChoiceGroup class You can create an instance of the List class with or without list items An instance is created without list items by passing the constructor of the List class two parameters The first parameter is a string that contains the titles of the list, and the other parameter is the format of the list (see Table 6-2), commonly referred to as the listType You can include list items when creating the instance of a List class by passing two additional parameters to the List class constructor The first two parameters are title and listType The third parameter is a string array whose elements contain list items that can be selected by the user of your MIDlet The fourth parameter is an array of instances of the Image class, each associated with a corresponding list item List items can be added to an instance of a List object by calling the append() method or insert() method The append() method requires two parameters The first parameter is the string that contains the new list item, and the second parameter is an instance of the Image class of an image that is associated with the new list item The new list item is appended to the end of the list The insert() method is very similar in design to the append() method, except the new list item is inserted within the list Three parameters are necessary for the insert() method The first parameter is the index number of the list item above which the new list item is inserted The other two parameters are the same as the parameters of the append() method You can retrieve the list item selected by the user by calling the getSelectedIndex() method The getSelectedIndex() method returns the index number of the selected list item You pass the returned index number as the parameter to the getString() method, which returns the string of the selected list item, which is then processed by the commandAction() method If the instance of the List class is a check box, then call the getSelectedFlag() method The getSelectedFlag() method requires one parameter, which is a boolean array The method then populates the boolean array with the selected flag value of each list item You can then evaluate each array element to determine which list items the user selected The size() method returns the number of items on the list and can be used to set the size of the boolean array One or more list items can become the default selection by calling the setSelectedIndex() method or the setSelectedFlags() method The setSelectedFlags() method is used to set the selected flag of one list item and requires two parameters The first parameter is the index number of the list item being selected, and the other parameter is a boolean value, where true signifies that the list item is selected and false signifies unselected The setSelectedIndex() method performs an operation similar to the setSelectedFlags(), except the setSelectedIndex() sets the selected status for all list items The setSelectedIndex(). vb.net ean 13 reader .NET EAN - 13 Barcode Reader for C#, VB . NET , ASP.NET Applications
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NET EAN - 13 Barcode Reader , Reading EAN - 13 barcode images in .NET, C#, VB . NET , ASP.NET applications. JToggleButton uses a model defined by a nested class called JToggleButton ToggleButtonModel Normally, you won t need to interact directly with the model to use a standard toggle button Like JButton, JToggleButton generates an action event each time it is pressed Unlike JButton, however, JToggleButton also generates an item event This event is used by those components that support the concept of selection When a JToggleButton is pressed in, it is selected When it is popped out, it is deselected To handle item events, you must implement the ItemListener interface Recall from 22, that each time an item event is generated, it is passed to the itemStateChanged( ) method defined by ItemListener Inside itemStateChanged( ), the getItem( ) method can be called on the ItemEvent object to obtain a reference to the JToggleButton instance that generated the event It is shown here: Object getItem( ) A reference to the button is returned You will need to cast this reference to JToggleButton The easiest way to determine a toggle button s state is by calling the isSelected( ) method (inherited from AbstractButton) on the button that generated the event It is shown here: boolean isSelected( ) It returns true if the button is selected and false otherwise Here is an example that uses a toggle button Notice how the item listener works It simply calls isSelected( ) to determine the button s state vb.net ean 13 reader EAN - 13 VB . NET DLL - KeepAutomation.com
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NET. Free demo download. How to read, scan EAN - 13 linear barcode image in . NET applications ... High-quality barcode reader ; C#, VB . NET sample code ... requires one parameter, which is a boolean array containing the selected status for the entire list Any list item can be replaced by calling the set() method The set() method requires three parameters The first is the index number of the list item being replaced The second parameter is the string replacing the string of the specified list item And the last parameter is an Image object that contains the image associated with the replacement list item A list item can be removed from the list by calling the delete() method The delete() method requires one parameter, which is the index number of the list item being deleted Split button In Split view, the top half of the screen shows the HTML code while the bottom half shows the page in Design view // Demonstrate JToggleButton import javaawt*; import javaawtevent*; import javaxswing*; /* <applet code="JToggleButtonDemo" width=200 height=80> </applet> */ public class JToggleButtonDemo extends JApplet { JLabel jlab; JToggleButton jtbn; public void init() { try { SwingUtilitiesinvokeAndWait( new Runnable() { public void run() { makeGUI(); } } ); } catch (Exception exc) { Systemoutprintln("Can't create because of " + exc); } 30: vb.net ean 13 reader VB . NET Image: VB Code to Read and Recognize EAN - 13 Barcode from ...
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