http://s107.photobucket.com/user/nguyenduydat274/media/onoff.png.html
On into Off: keep state (on/off) and disable listview
Off into On : keep sate (on/off) and enable lliseview.
I'll add small code from what I have understood. The idea is when you turn off / on the 'all saved movies' button, the list view should get enabled and disabled and also maintain the state of the particular movie.
public class UserSettingsMoviesAdapter extends BaseAdapter {
// Stores if the list is enabled or disabled. You need to update this
// value when the 'All saved movies' button is turned on or off.
private Boolean isListEnabled;
// This list will store if the movie is checked.
private List < Boolean > mArrChecked;
#Override
public boolean isEnabled(int position) {
if (isListEnabled) {
return true;
} else {
return false;
}
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
...
boolean isChecked = mArrChecked.get(position);
swOnOff.setChecked(isChecked);
swOnOff.setOnCheckedChangeListener(new OnCheckedChangeListener() {#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
mArrChecked.set(currentPos, isChecked);
notifyDataSetChanged();
}
});
...
}
}
Now, to enable or disable the whole list you'll need to change the value of isListEnabled variable. If it returns false, isEnabled() will return false for each item and all items will be disabled by the list view but the state will remain. Make sure you call notifyDataSetChanged() after updating the value of isListEnabled.
Related
My CardView duplicate elements upon data change, the vardView is within a tab, and the way i declared that tab fragment as following;
in the onCreateView, i declared all the necessary firebase links and value events listeners to retrieve the required data related to the elements displayed on the cards.
ref.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot snapshot) {
if(snapshot !=null){
for (DataSnapshot child: snapshot.getChildren()) {
Log.i("MyTag", child.getValue().toString());
imagesfeedsList.add(child.child("address").getValue(String.class));
authorfeedsList.add(child.child("author").getValue(String.class));
ratingfeedsList.add(child.child("rating").getValue(String.class));
locationfeedsList.add(child.child("location").getValue(String.class));
publicIDfeedsList.add(child.child("public_id").getValue(String.class));
}
Log.i("MyTag_imagesDirFinal", imagesfeedsList.toString());
mImages = imagesfeedsList.toArray(new String[imagesfeedsList.size()]);
author = authorfeedsList.toArray(new String[authorfeedsList.size()]);
ratingV = ratingfeedsList.toArray(new String[ratingfeedsList.size()]);
locationV = locationfeedsList.toArray(new String[locationfeedsList.size()]);
publicID = publicIDfeedsList.toArray(new String[publicIDfeedsList.size()]);
numbOfAdrs = Long.valueOf(imagesfeedsList.size());
LENGTH = Integer.valueOf(String.valueOf(numbOfAdrs));
}
right after the snippet the adapter setup;
ContentAdapter adapter = new ContentAdapter(recyclerView.getContext());
recyclerView.setAdapter(adapter);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
return recyclerView;
}
Then comes the view holder with a RecycleView, declaring the cardView elements. One of the elements is a ratingBar, and here where the ratingbar Listener is to submit the user rating on a specific picture.
after that the content adapter;
public static class ContentAdapter extends RecyclerView.Adapter<ViewHolder> {
// Set numbers of List in RecyclerView.
private Context mContext;
public ContentAdapter(Context context) {
this.mContext = context;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
return new ViewHolder(LayoutInflater.from(parent.getContext()), parent);
}
#Override
public void onBindViewHolder(final ViewHolder holder, int position) {
holder.authorName.setText(author[position]);
holder.ratingValue.setText(ratingV[position]);
holder.locationValue.setText(locationV[position]);
Picasso.with(mContext).load(mImages[position]).into(holder.picture);
#Override
public int getItemCount() {
return LENGTH;
}
}
My problem is whenever the user submits a rating or even when the data related to any of the elements on anycard changes, the view gets duplicated ( i mean by the view, the cards ), a repetition of the cards, with the new data chnages displayed ?
i a not sure what is in my above code structure causing this and how to fix this repetitions, i mean i need the cards to be updated with the new data but not duplicated?
All right, so the problem was that every time the data changes, in the onCreate the imagesFeedList, ratingFeedList, etc does not get rid of the old information stored in it from the initial build, so when the refresh happens triggered by onDataChange, the new information gets added to the previous information, which cause the view to repeat the cards, thus just at the beginning of onDataChange and before storing any information in the several feedLists, it must be cleared;
imagesfeedsList.clear();
authorfeedsList.clear();
ratingfeedsList.clear();
locationfeedsList.clear();
publicIDfeedsList.clear();
and by that i made sure the view does not repeat build up based on old information.
I have defined a CheckBoc TableColumn as
#FXML private TableColumn<Batch, Boolean> sltd;
And have defined the CellValueFactory & CellFactory
sltd.setCellValueFactory(new PropertyValueFactory<Batch, Boolean>("pr"));
sltd.setCellFactory(CheckBoxTableCell.forTableColumn(sltd));
My problem is i am not able to capture the edit column event for the checkbox. I use the following code:
sltd.setOnEditStart(new EventHandler<TableColumn.CellEditEvent<Batch, Boolean>>() {
#Override
public void handle(TableColumn.CellEditEvent<Batch, Boolean> t) {
//System.out.println("CheckBox clicked.");
}
});
I don't think the check boxes in the CheckBoxTableCell invoke the startEdit(...) method on the table.
The only thing that can happen in an edit is that the boolean property of one of the items in the table changes from true to false, or vice versa. So you can check for this just by listening directly to those boolean properties.
If you want a single listener that will catch changes to any of the properties, you can create an observableList with an "extractor" and register a list change listener with the list. This looks like:
ObservableList<Batch> items = FXCollections.observableArrayList(new Callback<Batch, Observable[]>() {
#Override
public Observable[] call(Batch batch) {
return new Observable[] { batch.prProperty() } ;
}
}
// populate items
table.setItems(items);
items.addListener(new ListChangeListener<Batch>() {
#Override
public void onChanged(Change<? extends Batch> change) {
while (change.hasNext()) {
if (change.wasUpdated()) {
System.out.println("Item at "+change.getFrom()+" changed value");
}
}
}
});
I have a LWUIT application that has a list which involving some items.
The list itself has been added to a Combobox .
1/ How I change the colour of an item of list when I focus on it?
final com.sun.lwuit.List mylist = new com.sun.lwuit.List();
mylist.addItem("one");
mylist.addItem("two");
mylist.addItem("three");
mylist.addItem("four");
final com.sun.lwuit.ComboBox combo = new com.sun.lwuit.ComboBox (mylist.getModel());
final com.sun.lwuit.Form ff = new com.sun.lwuit.Form();
ff.addComponent(combo);
2/ I want to do an action when I click ( or double click ) on an item ,
ActionListener interface didn't make that for me , can someone guide me?
mylist.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent ev)
{
System.out.println("java");
}
}
);
You Should set a renderer to ComboBox and can use both of setRenderer and setListCellRenderer but setListCellRenderer is
deprecated than use setRenderer:
combo.setRenderer(new ListCellRenderer() {
public Component getListCellRendererComponent(List list, Object value, int index, boolean isSelected) {
Label l = new Label(String.valueOf(value));
l.getStyle().setBgColor(0xffaa00);
return l;
}
public Component getListFocusComponent(List list) {
Label l = new Label(String.valueOf(list.getSelectedItem()));
l.getStyle().setBgColor(0x00ff00);
return l;
}
});
this working well.
To change the colour of a ComboBox you should modify the ComboBoxFocusstyle from the ResourceEditor.
If you are adding the list to the ComboBox, I think that you should put the ActionListener to the ComboBox not to the List as you are doing. Try this facts.
You can work with ListCellRenderer. Its helpful tool ,
look here for example
You can implement getListCellRendererComponent(..)- this function return the compenents that display on screen and responsible on UI.
If you work with ListCellRenderer you can use actionLisiner like this:
mylist.setRenderer(getListCellRenderer());
ActionListener chooseItemActionListener = new ActionListener() {
public void actionPerformed(ActionEvent evt) {
doAction(getSelected());
}
};
mylist.addActionListener(chooseItemActionListener);
I am trying to do per-keystroke validation in a JavaFX TextFieldTableCell but I do not know how to capture the text-changed events from the embedded TextField control.
If the object in question were simply a TextField, then textField.textProperty().addListener(myChangeListener) would do the trick. TextFieldTableCell also exposes textProperty(), but this property behaves quite differently on TextFieldTableCell. It does not generate change events on a per-keystroke basis. Rather, I see lots of events when the TableView is first displayed, and I see one event each time I begin editing in a cell.
First of all, about textProperty().
Look here to see :
http://docs.oracle.com/javafx/2/api/index.html
TextProperty() is a property of labeled parent class, you will learn nothing from it, because it is not used. It is tricky thing : cell - inheritant of labeled control. TextField, which you see, when start editing, it is a graphic node of cell (graphicProperty()) (as far as I remember documentation).
And, this graphic node is assigned by a text field, only when editing starts.
AFAIK, there is no direct access to editable node.
The way to solve the issue - implement editable cell by your self.
Let me talk to developer, to learn more...
Supposing, you have DataItem class, which contains String, and supposing that TableView has encapsulated data type DataItem, and the only column has the same encapsulated data type, you may use this implementation as basis :
public class TextFieldTableCell extends TableCell<DataItem, DataItem> {
private TextField textField;
public TextFieldTableCell() {
}
#Override
public void startEdit() {
super.startEdit();
if (isEmpty()) {
return;
}
if (textField == null) {
createTextBox();
} else {
textField.setText(new CellCustomStringConverter().toString(getItem()));
}
setGraphic(textField);
setContentDisplay(ContentDisplay.GRAPHIC_ONLY);
textField.requestFocus();
textField.selectAll();
}
#Override
public void cancelEdit() {
super.cancelEdit();
setContentDisplay(ContentDisplay.TEXT_ONLY);
}
#Override
public void updateItem(DataItem item, boolean empty) {
super.updateItem(item, empty);
if (!isEmpty()) {
if (textField != null) {
textField.setText(new CellCustomStringConverter().toString(item));
}
setText(item.toString());
}
}
private void createTextBox() {
textField = new TextField(new CellCustomStringConverter().toString(getItem()));
textField.setId(TABLE_EDIT_ID);
textField.setOnKeyReleased(new EventHandler<KeyEvent>() {
#Override
public void handle(KeyEvent t) {
if (t.getCode() == KeyCode.ENTER) {
commitEdit(new DataItem(textField.getText()));
} else if (t.getCode() == KeyCode.ESCAPE) {
cancelEdit();
}
}
});
}
}
If I create a List based on an array of Commands, and the text of some Commands are not entirely shown in the List, although the List preferredWidth is set to the Form preferredWidth, how to ticker them ?
Thank you very much
Add the below class in your midlet class or create a new class file for that:
class TickerRenderer extends DefaultListCellRenderer {
private DefaultListCellRenderer selectedRenderer = new DefaultListCellRenderer(false);
private List parentList;
public TickerRenderer() {
super(false);
}
public boolean animate() {
if (parentList != null && parentList.getComponentForm() != null) {
if (selectedRenderer.isTickerRunning()) {
if (selectedRenderer.animate()) {
parentList.repaint();
}
}
}
return super.animate();
}
public Component getListCellRendererComponent(List list, Object value, int index, boolean isSelected) {
if (isSelected) {
selectedRenderer.getListCellRendererComponent(list, value, index, isSelected);
// sometimes the list asks for a dummy selected value for size calculations and this might
// break the tickering state
if (index == list.getSelectedIndex()) {
if (selectedRenderer.shouldTickerStart()) {
if (!selectedRenderer.isTickerRunning()) {
parentList = list;
list.getComponentForm().registerAnimated(this);
selectedRenderer.startTicker(UIManager.getInstance().getLookAndFeel().getTickerSpeed(), true);
}
} else {
if (selectedRenderer.isTickerRunning()) {
selectedRenderer.stopTicker();
}
}
}
return selectedRenderer;
} else {
return super.getListCellRendererComponent(list, value, index, isSelected);
}
}
}
Use it like this:
List cmdList = new List(cmds);
cmdList.setListCellRenderer(new TickerRenderer());
Try this code, it will show list in dialog box on clicking "Show list" command and will also enable ticker initially. Below is the code which shows how to use the above mentioned class to see ticker in list when list is contained in dialog.
Don't forget to make your list final so that it can be used in inner classes.
form.addCommand(new Command("Show list") { // add command in form and override its actionPerformed method
public void actionPerformed(ActionEvent evt) {
Dialog d = new Dialog() { // create an instance of dialog and make it an inner class so that you can override onShow() method and set focus on list when dialog gets initialized and also can set its index to ur preferred one (here it's 0)
protected void onShow() { // overriding of onShow() method
list.requestFocus(); // set focus on list
list.setSelectedIndex(0); // set selected index to 0
}
};
d.addComponent(list); // add list in dialog
d.show(); // show dialog
}
});
This code shows my list in dialog and starts ticker initially. If it doesn't help, post your code, i will try to see it.