Why does this Dialog immediately dispose in this situation? - java-me

Question

There is a user defined component , derived from Container, inside my Form. It has a pointerPressed method implemented in its class code. In the code of that method I show a Dialog containing a List , and in the class code of the derived Dialog ( in the constructor ) I set the setDisposeWhenPointerOutOfBounds method with the argument value to true.
The problem is that in run time when I click the user defined component ( ListBox ) in my Form then the Dialog is shown , of course , but immediately it closes ( disposes ) , although I don't click outside the boundary of the Dialog !
So why does it have such a behavior ?
Codes :
public class ListBox extends Container
{
private Form containerForm;
private Container cListBox = new Container(new BorderLayout());
private Label[] tLabel;
private int[] tLabelW;
private int largestLabelW;
private Label libelle = new Label();
private Label arrow = new Label((MenuPrincipalForm.r).getImage("listboxarrow"));
private int preferredWidth, preferredHeight, screenWidth, screenHeight;
private Vector vData = new Vector();
private final int leftPadding = 3;
private int listW;
private List list;
private DialogListBox dialog;
private String selectedData;
public ListBox(Form containingForm, String[] lData, int prefHeight, int formWidth, int formHeight, int topMargin, int bottomMargin)
{
super(new FlowLayout(Component.CENTER));
setFocusable(true);
containerForm = containingForm;
screenWidth = formWidth;
screenHeight = formHeight;
tLabel = new Label[lData.length + 1];
tLabelW = new int[lData.length + 1];
if (lData.length > 0)
{
for (int i = 0 ; i < lData.length + 1 ; i++)
{
if (i < lData.length)
{
vData.addElement(new String(lData[i]));
tLabel[i] = new Label(lData[i]);
tLabelW[i] = tLabel[i].getPreferredW();
}
else
{
vData.addElement(new String(""));
tLabel[i] = new Label("");
tLabelW[i] = 0;
}
}
}
else
{
vData.addElement(new String(""));
tLabel[0] = new Label("");
tLabelW[0] = 0;
}
largestLabelW = Comparator.max(tLabelW);
preferredWidth = leftPadding + largestLabelW + arrow.getPreferredW();
preferredHeight = prefHeight - 2 ;
selectedData = String.valueOf(vData.lastElement());
libelle.setText(String.valueOf(vData.lastElement()));
libelle.setTextPosition(Label.LEFT);
libelle.setPreferredW(preferredWidth);
libelle.setPreferredH(preferredHeight);
arrow.setAlignment(Label.CENTER);
arrow.setPreferredH(preferredHeight);
dialog = new DialogListBox(leftPadding, this);
list = dialog.getList();
cListBox.addComponent(BorderLayout.WEST, libelle);
cListBox.addComponent(BorderLayout.EAST, arrow);
cListBox.setPreferredH(preferredHeight);
getUnselectedStyle().setPadding(Component.LEFT, leftPadding);
getSelectedStyle().setPadding(Component.LEFT, leftPadding);
getUnselectedStyle().setBorder(Border.createLineBorder(1));
getSelectedStyle().setBorder(Border.createLineBorder(1));
addComponent(cListBox);
setPreferredH(preferredHeight);
getUnselectedStyle().setMargin(Component.TOP, topMargin);
getSelectedStyle().setMargin(Component.TOP, topMargin);
getUnselectedStyle().setMargin(Component.BOTTOM, bottomMargin);
getSelectedStyle().setMargin(Component.BOTTOM, bottomMargin);
}
public void setSelectedIndex(int idx)
{
list.setSelectedIndex(idx);
selectedData = String.valueOf(vData.elementAt(idx));
libelle.setText(String.valueOf(vData.elementAt(idx)));
repaint();
}
public void setSelectedData(String data)
{
selectedData = data;
libelle.setText(selectedData);
repaint();
}
public String getSelectedData()
{
return selectedData;
}
public int getLastIndex()
{
return vData.indexOf(vData.lastElement());
}
public Vector getListBoxDataSource()
{
return vData;
}
private void showListBoxDialog()
{
int espaceVertRestant, top, bottom, left, right;
espaceVertRestant = screenHeight - ( libelle.getAbsoluteY() + preferredHeight );
if (espaceVertRestant > list.getPreferredH())
{
top = getAbsoluteY() + preferredHeight - 1 ;
bottom = screenHeight - ( getAbsoluteY() + preferredHeight + list.getPreferredH() ) ;
}
else
{
top = screenHeight - ( list.getPreferredH() + preferredHeight + espaceVertRestant ) ;
bottom = getAbsoluteY() - 1 ;
}
left = getAbsoluteX() ;
right = screenWidth - ( getAbsoluteX() + getPreferredW() );
listW = screenWidth - left - right ;
containerForm.setTintColor(containerForm.getSelectedStyle().getBgColor());
dialog.setListW(listW);
dialog.show(top, bottom, left, right, false, false);
}
public void keyPressed(int keyCode)
{
int gameAction = (Display.getInstance()).getGameAction(keyCode);
if (gameAction == Display.GAME_FIRE)
showListBoxDialog();
else
super.keyPressed(keyCode);
}
public void pointerPressed(int x, int y)
{
showListBoxDialog();
}
}
public class DialogListBox extends Dialog implements ActionListener
{
private Vector vData;
private CListCellListBox listRenderer;
private List list;
private ListBox theListBox;
public DialogListBox(int leftPadding, ListBox listBox)
{
super();
setFocusable(true);
setDisposeWhenPointerOutOfBounds(true);
getContentPane().getSelectedStyle().setPadding(0, 0, 0, 0);
getContentPane().getUnselectedStyle().setPadding(0, 0, 0, 0);
getContentPane().getStyle().setPadding(0, 0, 0, 0);
theListBox = listBox;
listRenderer = new CListCellListBox(false);
vData = listBox.getListBoxDataSource();
list = (new CList(vData, false)).createList(listRenderer, this);
list.setItemGap(0);
list.setSelectedIndex(vData.indexOf(vData.lastElement()));
list.getSelectedStyle().setPadding(0, 0, leftPadding, 0);
list.getUnselectedStyle().setPadding(0, 0, leftPadding, 0);
list.getUnselectedStyle().setBorder(Border.createLineBorder(1), false);
list.getSelectedStyle().setBorder(Border.createLineBorder(1), false);
list.setIsScrollVisible(false);
addComponent(list);
}
protected void onShow()
{
list.requestFocus();
repaint();
}
public void setListW(int prefW)
{
list.setPreferredW(prefW);
}
public List getList()
{
return list;
}
private void refreshListBox()
{
dispose();
if (list.getSelectedItem() instanceof Content)
{
Content valeur = (Content)list.getSelectedItem();
theListBox.setSelectedData(valeur.getEnreg());
}
}
public void keyPressed(int keyCode)
{
int gameAction = (Display.getInstance()).getGameAction(keyCode);
if (gameAction == Display.GAME_FIRE)
refreshListBox();
else
super.keyPressed(keyCode);
}
public void actionPerformed(ActionEvent ae) {
if ( (ae.getSource() instanceof List) && ((List)ae.getSource()).equals(list) )
refreshListBox();
}
}
public class CList {
private Vector data = new Vector();
private boolean showPhoto;
private Content[] contents;
public CList(Vector vData, boolean displayPhoto)
{
data = vData;
showPhoto = displayPhoto;
contents = new Content[vData.size()];
}
public List createList(CListCell renderer, ActionListener listener)
{
List theList;
if (showPhoto)
{
for(int i = 0; i < data.size(); i++)
{
Image img = getFirstImage(Formatage.getColumnValueAt(String.valueOf(data.elementAt(i)), 0));
contents[i] = new Content(img, String.valueOf(data.elementAt(i)));
}
}
else
{
for(int i = 0; i < data.size(); i++)
{
contents[i] = new Content(String.valueOf(data.elementAt(i)));
}
}
theList = new List(contents);
theList.setListCellRenderer(renderer);
theList.setFixedSelection(List.FIXED_NONE_CYCLIC);
theList.addActionListener(listener);
return theList;
}
// ... other methods
}

Answer 1

You should always use pointerReleased/keyReleased for navigation to different forms/dialogs.
Otherwise the pointer/key released will be sent to the next form/dialog and trigger an action there.
Pointer pressed is mostly used internally in LWUIT and for some special cases.