I'm having little trouble accessing public ivars form the ccTouchesBegan method,
I have this Scene:
class introScene : public cocos2d::CCLayer {
public:
virtual bool init();
static cocos2d::CCScene* scene();
bool autoScroll;
virtual void ccTouchesBegan(cocos2d::CCSet* touches, cocos2d::CCEvent* event);
void skip();
CREATE_FUNC(introScene);
};
and from inside the .cpp file I try to access the variable autoScroll, but it insists that the variable doesn't exist, am I doing anything wrong here ??
void ccTouchesBegan(cocos2d::CCSet* touches, cocos2d::CCEvent* event){
autoScroll = false;
}
This generates: use of undeclared identifier 'autoScroll'
I don't know anything about cocos2d, but I reckon you've defined the method incorrectly as you've missed off the class name. Try this:
void introScene::ccTouchesBegan(cocos2d::CCSet* touches, cocos2d::CCEvent* event){
// ^^^^^^^
autoScroll = false;
}
Related
I am building a download manager in javafx
I have added function to download button which initialises new task.More than one download is also being executed properly.
But I need to add pause and resume function. Please tell how to implement it using executor. Through execute function of Executors, task is being started but how do i pause & then resume it??
Below I am showing relevant portions of my code. Please tell if you need more details. thanks.
Main class
public class Controller implements Initializable {
public Button addDownloadButton;
public Button pauseResumeButton;
public TextField urlTextBox;
public TableView<DownloadEntry> downloadsTable;
ExecutorService executor;
#Override
public void initialize(URL location, ResourceBundle resources) {
// here tableview and table columns are initialised and cellValueFactory is set
executor = Executors.newFixedThreadPool(4);
}
public void addDownloadButtonClicked() {
DownloadEntry task = new DownloadEntry(new URL(urlTextBox.getText()));
downloadsTable.getItems().add(task);
executor.execute(task);
}
public void pauseResumeButtonClicked() {
//CODE FOR PAUSE AND RESUME
}
}
DownloadEntry.java
public class DownloadEntry extends Task<Void> {
public URL url;
public int downloaded;
final int MAX_BUFFER_SIZE=50*1024;
private String status;
//Constructor
public DownloadEntry(URL ur) throws Exception{
url = ur;
//other variables are initialised here
this.updateMessage("Downloading");
}
#Override
protected Void call() {
file = new RandomAccessFile(filename, "rw");
file.seek(downloaded);
stream = con.getInputStream();
while (status.equals("Downloading")) {
byte buffer=new byte[MAX_BUFFER_SIZE];
int c=stream.read(buffer);
if (c==-1){
break;
}
file.write(buffer,0,c);
downloaded += c;
status = "Downloading";
}
if (status.equals("Downloading")) {
status = "Complete";
updateMessage("Complete");
}
return null;
}
}
You may be interested in Concurrency in JavaFX.
I guess you should also have a look at pattern Observer.
By the way I think you should not use constant string as a status ("Downloading", etc), creating an enum would be a better approach.
In your loop, around the read/write part, there should be a synchronization mechanism, controlled by your pause/resume buttons (see the two links).
I am developing for android using android annotations but I don't unterstand how to use it with CursorAdapters.
There is already a example for BaseAdapters, but if I add #EBean to a class that extents CursorAdapter I get the error message "#EBean annotated element should have a constructor with one parameter max, of type android.content.Context". CursorAdapter already has two constructors.
public class SongInfoAdapter extends CursorAdapter {
...
#Override
public void bindView(View view, Context context, Cursor cursor) {
...
rowData.id.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
itemOnClick(rowData);
}
});
}
public void itemOnClick(RowDataHolder rowData) {
switch(audioPlayer.getPlayingplayer()) {
case AudioPlayer.RIGHT:
case AudioPlayer.NONE:
audioPlayer.load(rowData.songInfo, AudioPlayer.LEFT);
break;
case AudioPlayer.LEFT:
audioPlayer.load(rowData.songInfo, AudioPlayer.RIGHT);
break;
}
}
...
}
AudioPlayer is a class that uses annotations (#EBean), but I can't write
#Bean
AudioPlayer audioPlayer;
because I can't use annotations in this class. How can I use AndroidAnnotations in CursorAdapter?
Many thanks in advance .
Create a constructor that takes one argument, the context.
SongInfoAdapter (Context context) {
super(context, null, FLAG_AUTO_REQUERY);
}
Create an init method and set the cursor for the adapter in init.
public void init(Cursor c) {
this.changeCursor(c);
}
Now you can annotate SongInfoAdapter with #EBean and use annotations.
Is there any way to pass parameters to the onAction methods in the fxml files? Alternatively, can I somehow get the fx:id of the component that called the onAction method?
I have several Buttons that should do the same thing, say 5 buttons with ids button1 - button5 that, when pressed, should print the corresponding number 1-5. I don't want to have 5 onAction methods that are identical up to this variable.
Any help appreciated,
Call just one handler, the actionEvent.source is the object that originated the event.
Try this:
myButton1.setOnAction(new MyButtonHandler());
myButton2.setOnAction(new MyButtonHandler());
private class MyButtonHandler implements EventHandler<ActionEvent>{
#Override
public void handle(ActionEvent evt) {
if (evt.getSource().equals(myButton1)) {
//do something
} else if (evt.getSource().equals(myButton2)) {
//do something
}
}
}
Or:
myButton1.addEventHandler(ActionEvent.ACTION, new MyButtonHandler());
myButton2.addEventHandler(MouseEvent.CLICKED, new MyButtonHandler());
private class MyButtonHandler implements EventHandler<Event>{
#Override
public void handle(Event evt) {
if (evt.getSource().equals(myButton1)) {
//do something
} else if (evt.getSource().equals(myButton2)) {
//do something
}
}
}
I am studying orchard architecture.i have faced with a strange concept in display management section.
in Partial view page there is a 'function call like' syntax like so Display(Model.Head). that is not a function thought, it is a dynamic object defined in orchard WebViewPage.
I am wondering how to define a dynamic object so that you can call it (and pass it an argument as well) like a function as i mentioned.
thanks in advance.
A lighter weight way to do it without clay would be to subclass the built-in DynamicObject class.
public static dynamic Display;
void Main()
{
Display = new MyCallableObject();
//this is what i was after
Console.Write(Display("bla bla bla"));
}
public class MyCallableObject:DynamicObject
{
public override bool TryInvoke(InvokeBinder binder, object[] args, out Object result)
{
result = string.Format("This is response for {0}",args.FirstOrDefault());
return true;
}
}
I finally found it my self!
all the operations have done with Clay Library behind the scene.i have wrote a sample console app for demonstrating the process.
class Program
{
static void Main(string[] args)
{
Display = ClayActivator.CreateInstance<MyResponser>(new List<IClayBehavior> {new MyFunctionCallBehavior()});
//this is what i was after
Console.Write(Display("bla bla bla"));
}
public static dynamic Display;
}
public class MyFunctionCallBehavior : IClayBehavior
{
public object InvokeMember(Func<object> proceed, object self, string name, INamedEnumerable<object> args)
{
return ((MyResponser)self).ResponseForRequest(args.FirstOrDefault().ToString());
}
}
public class MyResponser
{
public string ResponseForRequest(string param)
{
return string.Format("This is response for {0}",param);
}
}
Here is some of the code in my midlet:
the addKeyListener method presents an error as the function is not recognized.
import net.rim.device.api.system.KeyListener;
import net.rim.device.api.ui.Keypad;
public class PhraZApp extends javax.microedition.midlet.MIDlet implements ActionListener{
public PhraZApp {
addKeyListener (new KeyPadListener());
}
protected void keyPressed(int key) {
System.out.println(key);
}
public void actionPerformed(ActionEvent evt) {
System.out.println(evt.getKeyEvent());
}
public final class KeyPadListener implements KeyListener {
public boolean keyChar(char key, int status, int time) {
return false;
}
public boolean keyDown(int keycode, int time) {
if (Keypad.KEY_ESCAPE == Keypad.key(keycode)) {
System.out.println("key: " + keycode);
return true;
}
//let the system to pass the event to another listener.
return false;
}
public boolean keyUp(int keycode, int time) {
throw new UnsupportedOperationException("Not supported yet.");
}
public boolean keyRepeat(int keycode, int time) {
throw new UnsupportedOperationException("Not supported yet.");
}
public boolean keyStatus(int keycode, int time) {
throw new UnsupportedOperationException("Not supported yet.");
}
}
The keyPressed action is not heard by any of those listeners.
Ive been told to add the keylistner to a GUI component, but none that I try it with accept it.
Furthermore, one of the possible issues is that the addKeyListener method is not declared, but in that case I don't know how to declare it.
If i change extends javax.microedition.midlet.MIDlet to extends UiApplication, the addKeyListener becomes accepted but the entire midlet falls to a RuntimeErrorException.
How can I get my Midlet to hear the escape key? I have searched through many forums and none of the suggestions have worked so far.
Thanks in advance.
You need to create a LWUIT Command and assign it to the parent form using the setBackCommand method. You can handle the command event like you handle every other command in LWUIT. E.g. through a command listener or even just by subclassing it and overriding actionPerformed(ActionEvent).
Thanks to Shai pointing me in the right direction, I solved it.
Here is how I did it.
Command backCommand = new Command("",Keypad.KEY_ESCAPE);
form.setBackCommand(backCommand);
then
public void actionPerformed(ActionEvent evt) {
if (evt.getCommand().getId() ==Keypad.KEY_ESCAPE){
//execution code
}
I didn't try, but if I had included text in the command I imagine it would appear as such when I push the menu button. The important thing is that I finally got the MIDlet to hear out the escape button after MANY hours of trying and searching for solutions.