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Enerjak

Help with adding an array of strings to a combobox (also lists as i've tried before).

3 posts in this topic

Ok, well, my problem is this: I want to add the name of the items to a combo box based on how many items there are in the away.
now i tried this:

[CODE]
public boolean addTabs()
{
String[] names;
HardwareStock stock = store.getStock();

HardwareItem Item = null;

if(stock.listSize() >= 0)
{
for(int index = 0; index < stock.listSize(); index++)
{
Item = stock.elementAt(index);

if(Item != null)
{
this.itemSelection.setModel(new DefaultComboBoxModel(new String[]
{
"Pick an item",
store.getStock().elementAt(index).getItemName()
}));
}
}
}
if(Item != null)
{
return true;
}
else
{
return false;
}
}
[/CODE]

but sadlly it only added one item name after the <pick an item> where it should of added all 8 (size of the away so far....) any items? please ask me anything I know this seems vague, but my professor always says "if you need help, ask for it"
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You are replacing the ComboBoxModel with a new one every time you process an Item.

Try something like this:
[source lang="java"] public boolean addTabs() {
HardwareStock stock = store.getStock();
itemSelection.setModel(createItemSelectionModel(stock));
return stock.listSize() > 0;
}

private ComboBoxModel<String> createItemSelectionModel(HardwareStock stock) {
MutableComboBoxModel<String> model = new DefaultComboBoxModel<String>();
model.addElement("Pick an item");
for (int i = 0; i < stock.listSize(); i++) {
model.addElement(stock.elementAt(i).getItemName());
}
return model;
}
[/source]
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You could walk the extra mile with a "renderer".

[quote name='Enerjak' timestamp='1351776979' post='4996177']
I honestly love you man thanks!!
[/quote]
But I warn you: I'm happily married [img]http://public.gamedev.net//public/style_emoticons/default/tongue.png[/img]

[source lang="java"]
private void createItemSelection() {
itemSelection = new JComboBox<HardwareItem>();
itemSelection.setModel(createItemSelectionModel());
itemSelection.setRenderer(createItemSelectionRenderer());
}

public boolean addTabs() {
HardwareStock stock = store.getStock();
itemSelection.removeAllItems();
itemSelection.addItem(null);
for (int i = 0; i < stock.listSize(); i++) {
itemSelection.addItem(stock.elementAt(i));
}
return stock.listSize() > 0;
}

@SuppressWarnings("unchecked")
private ListCellRenderer<HardwareItem> createItemSelectionRenderer() {
return new BasicComboBoxRenderer() {
private static final long serialVersionUID = 1L;
@Override
public Component getListCellRendererComponent(
@SuppressWarnings("rawtypes") JList list,
Object value,
int index,
boolean isSelected,
boolean cellHasFocus
) {
Component rendererComponent = super.getListCellRendererComponent(
list, value, index, isSelected, cellHasFocus);
HardwareItem item = (HardwareItem) value;
String text = (item == null) ? "Pick an item" : item.getItemName();
setText(text);
return rendererComponent;
}
};
}

private ComboBoxModel<HardwareItem> createItemSelectionModel() {
MutableComboBoxModel<HardwareItem> model =
new DefaultComboBoxModel<HardwareItem>();
model.addElement(null);
return model;
}
[/source]

For some reason I cannot properly visualise the code with my browser [img]http://public.gamedev.net//public/style_emoticons/default/blink.png[/img] Edited by ppgamedev
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