/** Shows a Dialog displaying the selected indices and then shows the MIDlet main view. */
public void showSelectedDialog() {
String text = (getSelectedIndices().length == 0 ? "No selected items." : "");
for (int i = 0; i < getSelectedIndices().length; i++) {
text += "List item " + (getSelectedIndices()[i] + 1) + " selected.\n";
}
Dialog.show(
Compatibility.toLowerCaseIfFT("Selected"),
text,
new Command(Compatibility.toUpperCaseIfFT("Continue")),
null,
Dialog.TYPE_INFO,
null,
1500L);
DemoMidlet.getMainForm().show();
}
/**
* This is a base class for the list demos. It shows the selected items on a <code>Dialog</code>
* when the list demo is exited, and it shows a confirmation query if Back button is pressed after
* making changes to the list.
*/
public abstract class ListView extends Form {
public static final int MAX_ITEMS = 10;
public final String LIST_ITEM_TEXT = Compatibility.toLowerCaseIfFT("List item ");
public static final String LONG_TEXT =
", Lorem ipsum dolor sit amet, consectetur adipiscing "
+ "elit. Phasellus vel neque pulvinar libero vestibulum malesua.";
protected List list;
protected int[] originalSelectedIndices; // used when abandoning changes
private boolean confirmationQuery = false;
public ListView() {
setLayout(new BoxLayout(BoxLayout.Y_AXIS));
// The list selection is stored every time the form is shown,
// so we can see if changes have been made when the form is exited and
// revert the changes if necessary.
this.addShowListener(
new ActionListener() {
public void actionPerformed(ActionEvent ae) {
originalSelectedIndices = getSelectedIndices();
}
});
// Add back command for exiting the Form.
Command backCommand =
new Command("Back") {
public void actionPerformed(ActionEvent e) {
back();
}
};
setBackCommand(backCommand);
}
/** Shows a Dialog displaying the selected indices and then shows the MIDlet main view. */
public void showSelectedDialog() {
String text = (getSelectedIndices().length == 0 ? "No selected items." : "");
for (int i = 0; i < getSelectedIndices().length; i++) {
text += "List item " + (getSelectedIndices()[i] + 1) + " selected.\n";
}
Dialog.show(
Compatibility.toLowerCaseIfFT("Selected"),
text,
new Command(Compatibility.toUpperCaseIfFT("Continue")),
null,
Dialog.TYPE_INFO,
null,
1500L);
DemoMidlet.getMainForm().show();
}
/**
* Returns an array containing the indices of selected list items
*
* @return Array containing the selected indices.
*/
public int[] getSelectedIndices() {
return new int[] {list.getSelectedIndex()};
}
/**
* Sets the list items as selected / not selected based on the indices in an array.
*
* @param indices Array containing the selected indices.
*/
public void setSelectedIndices(int[] indices) {
if (indices.length > 0) {
list.setSelectedIndex(indices[0]);
}
}
/**
* Turns on or off the confirmation query that is displayed when list is dismissed and changes
* have been made to the list selection.
*
* @param value is the confirmation query shown.
*/
public void setShowConfirmationQuery(boolean value) {
confirmationQuery = value;
}
/**
* Returns true if the list selections have changed after displaying the list. Otherwise returns
* false.
*
* @return true if the list has changed, otherwise false.
*/
public boolean hasChanged() {
int[] s = getSelectedIndices();
if (s.length != originalSelectedIndices.length) {
return true;
}
for (int i = 0; i < s.length; i++) {
if (s[i] != originalSelectedIndices[i]) {
return true;
}
}
return false;
}
/** Shows the ListDemo main view. Displays a confirmation query if needed. */
protected void back() {
if (hasChanged() && confirmationQuery) {
int[] tmp = new int[originalSelectedIndices.length];
System.arraycopy(originalSelectedIndices, 0, tmp, 0, tmp.length);
if (Dialog.show("save changes", "Save changes made?", "Yes", "No")) {
showSelectedDialog(); // Proceed with the changes
} else {
setSelectedIndices(tmp); // Abandon changes
DemoMidlet.getMainForm().show();
}
} else {
DemoMidlet.getMainForm().show();
}
}
public void setTitle(String title) {
super.setTitle(Compatibility.toLowerCaseIfFT(title));
}
public String toString() {
return getTitle();
}
}
public void setTitle(String title) {
super.setTitle(Compatibility.toLowerCaseIfFT(title));
}