Receive notification of UIView changes from outside that class
Say, I want to know when a specific UIView object receives a notification (for instance, viewDidDisappear:) but I need to know it from outside of that class, or in another class derived from NSObject. Is it possible to do at all?
you can't access anything related to a particular class unless you have access to that class. you don't necessarily have to open the class file and inspect/edit it. but you do need to have a reference to a class instance.
so, if you have a class where you create a class instance, you can use that to "try" and remove that listener (assuming its an instance method). if the listener is a static method, it's even easier.
Similar Messages
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Foreground color change from inside a class
Hey,
For a project I'm working on, I wrote a class that extends awt.Label. In this new class, I had to override the paramString() method to return what I wanted it to. This all works great. What I was wondering, is whether or not it was possible to change the foreGround color of the label from inside the class decleration. I was thinking maybe whenever the paramString() method was called. Any help would be appreciated.
Thanks,
JarrodGday,
I you use the mothed setForeground(Color c) it should set the foreground colour (color for you Americans) to what you would like.
see for more info
http://java.sun.com/j2se/1.3/docs/api/java/awt/Component.html#setForeground(java.awt.Color)
or
http://java.sun.com/j2se/1.4/docs/api/java/awt/Component.html#setForeground(java.awt.Color)
if you have jdk1.4
You dont need to make this method in your class just call it when you want. ie
setForground(Color.RED);
or
Color c = new Color(255, 0, 0);
setForeground(c);
Good luck,
Jack 573 -
Can a waveform graph's display parameters be changed in an exe from outside that exe?
Hi all,
I have a kind of strange Q to post here:
I've got a quite stable test execution system still based on LV 7.11. Amoung others it has a waveform graph that shows curves for different test measurements. All be done in the exe, mostly via Refnums of that graph and property nodes in subVIs that (re-)configure the graph to show the respective signals, descriptions, scales etc. Worked fine for many months, if not years.
This morning I got a call from production floor that they got strange displays. Turned out that some of the properties of that graph became misconfigured, Example: X-sxale is now at autoscaling and the x-scrollbar is invisible. So I got a black bar when displaying ~350 s of ECG data instead of ~5 s. This never happened before and happened similar on at least two (independent) machines. They only share a mySQL-database, some shared folders on the LAN to store results, a LAN-based printer and a common source for an ini-file for test configuration.
They also had problems printing the test reports this morning.
Is there any configuration outside of my exe (for LV runtime?) that could have coused this?
Greetings from Germany!
UweCoq Rouge wrote:
Have the computers been updated with some new software? Like windows service packs, new virus scanner etc
Hi Uwe,
I have to side with Coq Rouge on this Q.
It is possible to "reach-out and touch" if VI server is enabled on those machines but the possibility of malcious code finding the invokations required to pull that off.... unless you have a competitor that has you in their gun sights .... are remote.
There have been a couple of posting here where people have noticed odd things happening with window focus etc. In my case it seems like Windows is clcikcing my mouse for me. I have only seen this on teh Windows XP machine that I allow to get updates.
I believe the system logs should record signs of updates etc. The machines affected should be chcked.
I admit the above is of little use, but maybe it can inspire you.
Trying to help,
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction -
I need to know when the user has changed the value of a slider or a Boolean control that was dynamically created (not part of a dialog). Is there any way to do that without polling? I would have expected these controls to post a WM_NOTIFY message to the parent window in response to user events, but that does not seem to happen. Am I missing something?
Win32 controls do typically post WM_NOTIFY messages to the parent window for user events. The Measurement Studio UI controls are actually ActiveX controls, though, and events are handled differently for ActiveX controls.
If you have a resource ID for you control, the easiest way would be to create your control in the OnInitDialog method and handle the event the same way you would if you had added the control to the dialog at design-time:
Add a declaration for the event handler in the AFX_MSG block in the dialog header file.
Make sure the AFX_MSG block in the header file includes DECLARE_EVENTSINK_MAP()
Include an ON_EVENT entry for the event in the dialog source's BEGIN_EVENT_SINK_MAP block.
Include a DDX_Control entry
in the dialog source's AFX_DATA_MAP block.
Otherwise, you'll have to dynamically sink the event at runtime after you've created the control. Microsoft's Knowledge Base has a couple of good articles that demonstrate how to do this:
SAMPLE: AtlEvnt.exe Creates ATL Sinks Using IDispEventImpl (Q194179)
AtlSink Uses ATL to Create a Dispinterface Sink (Q181277)
- Elton -
Having a problem calling and displaying a page,from outside the class?? :-(
Hi,
I seem to be having a problem displaying a class from a different page, it is called but all i get is a blank page, even though when i compile and run it by itself it works fine?? I call it like:
if(source == animateVMS)
{ImageSequence i = new ImageSequence();
i.setSize(Toolkit.getDefaultToolkit().getScreenSize());
i.show();
this.dispose();
}but it only displays a blank screen?? I think it is sumthing to do with the contructor of the following class?
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class ImageSequence extends JFrame implements ActionListener
{ static ImageSequence controller = new ImageSequence();
ImageSQPanel imageSQPanel;
static int frameNumber = -1;
int delay;
Thread animatorThread;
static boolean frozen = false;
Timer timer;
//Invoked only when this is run as an application.
public static void main(String[] args) {
Image[] waving = new Image[10];
for (int i = 1; i <= 10; i++) {
waving[i-1] = Toolkit.getDefaultToolkit().getImage("images/T" + i + ".gif");
JFrame f = new JFrame("ImageSequenceTimer");
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
//ImageSequence controller = new ImageSequence();
controller.buildUI(f.getContentPane(), waving);
controller.startAnimation();
f.setSize(Toolkit.getDefaultToolkit().getScreenSize());
f.setVisible(true); }
//Note: Container must use BorderLayout, which is the
//default layout manager for content panes.
void buildUI(Container container, Image[] dukes) {
int fps = 10;
//How many milliseconds between frames?
delay = (fps > 0) ? (1000 / fps) : 100;
//Set up a timer that calls this object's action handler
timer = new Timer(delay, new TimerListener());
timer.setInitialDelay(0);
timer.setCoalesce(true);
JPanel buttonPanel = new JPanel();
JButton play = new JButton("PLAY");
play.addActionListener(this);
JButton stop = new JButton("STOP");
stop.addActionListener(this);
JButton back = new JButton("Back");
back.addActionListener(this);
imageSQPanel = new ImageSQPanel(dukes);
container.add(imageSQPanel, BorderLayout.CENTER);
container.add(buttonPanel, BorderLayout.SOUTH);
buttonPanel.add(play);
buttonPanel.add(stop);
buttonPanel.add(back);
public void start() {
startAnimation();
public void stop() {
stopAnimation();
public synchronized void startAnimation() {
if (frozen) {
//Do nothing. The user has requested that we
//stop changing the image.
else {
//Start animating!
if (!timer.isRunning()) {
timer.start();
public synchronized void stopAnimation() {
//Stop the animating thread.
if (timer.isRunning()) {
timer.stop();
/** * Listener for the play, stop, restart, and back buttons. */
public void actionPerformed(ActionEvent e) {
JButton button = (JButton)e.getSource();
String label = button.getActionCommand();
if("PLAY".equals(label))
start();
if("STOP".equals(label))
stop();
if("BACK".equals(label))
{varsity v = new varsity();
v.setSize(Toolkit.getDefaultToolkit().getScreenSize());
v.show();
this.dispose();
/** * Listener for the animation timer. */
private class TimerListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
//Advance the animation frame.
frameNumber++;
//Display it.
imageSQPanel.repaint();
class ImageSQPanel extends JPanel {
Image dukesWave[];
public ImageSQPanel(Image[] dukesWave) {
this.dukesWave = dukesWave; }
//Draw the current frame of animation.
public void paintComponent(Graphics g) {
super.paintComponent(g);
//paint background
//Paint the frame into the image.
try {
g.drawImage(dukesWave[ImageSequenceTimer.frameNumber%10],0, 0, this);
catch (ArrayIndexOutOfBoundsException e) {
//On rare occasions, this method can be called
//when frameNumber is still -1. Do nothing.
return;
}Could someone please try to help me fix my problem!
Kind Regards
RSHcheers that did the trick!! : - )
I was wondeing if you could help me with one more thing, its about getting rid of an old page after you press a button to go to a new page! this.dispose doesnt wrk below:
JButton back = new JButton("BACK");
back.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent e)
VowelmSound s = new VowelmSound();
s.setSize(Toolkit.getDefaultToolkit().getScreenSize());
s.show();
//this.dispose();
}); and this is main
public static void main(String[] args)
JFrame draw = new punjabidraw();
draw.setVisible(true);
}I was wondering what I could use to get rid of the old page??
Kind Regards
Raj -
Painting from outside main class
Im writing some generic code and im having trouble trying to get the called class to paint correctly. I have this code so far, and it works, but I dont like it. I pass in graphics as a parameter and it doesnt use the natural repaint method, so I was hoping someone could show me how to do this the "right way". I also want to avoid using threads, im pretty sure theyre not absolutely necessary.
Theres 2 classes, essentially its
class 1: paint a green splashscreen, user presses button> call class 2
class 2: paint a white screen and moving ball
(the while loop has been commented out so i can check the state of repaint. My normal programs automatically repaint if i minimise them, this one wont repaint properly).
import java.awt.*;
import java.applet.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
public class Multi extends Applet implements ActionListener{
Mgame game=new Mgame();
private Button host;
public void init() {
setLayout(null) ;
setButtons();
public void paint(Graphics g) {
g.setColor(Color.green);
g.fillRect(0,0,700,500);
public void setButtons() {
host= new Button ("Host Game");
host.setBounds(470,395,100,30);
add(host);
host.addActionListener(this);
public void actionPerformed(ActionEvent event)
Graphics g = getGraphics();
game.gamerun(g);
import java.awt.*;
import java.applet.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
class Mgame{
int ballx = 0;
Graphics g;
public void xpaint(){
g.setColor(Color.white);
g.fillRect(0,0,700,500);
g.setColor(Color.red);
g.fillOval(ballx, 40, 90, 90);
public void gamerun(Graphics graphics){
g=graphics;
//while(true){
ballx=ballx+1;
if (ballx==500) {ballx=10;}
try { Thread.sleep(100); } catch (Exception e) {}
xpaint();
}Thanks for any help.How would I fix that then?
I tried using
class Mgame extends Multi{
<etc>
}Which means that the program now compiles, but now the program seems to skip the Mgame.gamerun repaint() line, so the program looks like its freezed up.
New code listing is:
import java.awt.*;
import java.applet.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
public class Multi extends Applet implements ActionListener{
Mgame game;
private Button host;
public void init() {
game=new Mgame();
setLayout(null) ;
setButtons();
public void paint(Graphics g) {
g.setColor(Color.green);
g.fillRect(0,0,700,500);
public void setButtons() {
host= new Button ("Host Game");
host.setBounds(470,395,100,30);
add(host);
host.addActionListener(this);
public void actionPerformed(ActionEvent event)
game.gamerun();
import java.awt.*;
import java.applet.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
class Mgame extends Multi{
int ballx = 0;
public void paint(Graphics g){
g.setColor(Color.white);
g.fillRect(0,0,700,500);
g.setColor(Color.red);
g.fillOval(ballx, 40, 90, 90);
public void gamerun(){
while(true){
ballx=ballx+1;
if (ballx==500) {ballx=10;}
try { Thread.sleep(100); } catch (Exception e) {}
repaint();
} -
How to make the application access the fonts from outside library?
actually the fonts located in the library are considered from the system/library/fonts path. is it possible to make it accessible from outside that path through programatically for indesign applications? if yes means, how to do it?
thanks
subhai think am not mentioned the question clear.
the fonts menu inside InDesign lists the fonts from
for mac: System/Library/Fonts
Adobe InDesign CS2/fonts
for windows: C:\WINDOWS\Fonts
C:\Program Files\Adobe\Adobe InDesign CS2\Fonts
is it possible to list the font from someother folder rather than this folders.
by
Subha... -
HT3576 I recently swap my iphone and now I don't receive notifications
I recently exchange my iphone for the same one for a minor issue ans now I don't receive notifications, I rue downloaded an app that use to notify me about my sports and it still hasn't notified me on any team or time event.
OK.... It is solved. Meanwhile, I discovered a Apple KB that recomended to wait for 24 hours before trying again.
I waited 24 hours and it is wortking again.
I have to give 10 points to myself..... :-) I am sorry but the problem wernt way and I want to close it.
Cheers
Jorge -
What is the best antivirus software for a Macbook Pro...I recently received a message from Google that someone made an attempt to hack into my mail account and I needed to change my PW and verify myself as the user. The message suggested that I run a virus scan to check for sny malware or other types of viruses. I do not have any software for this and up until now have not had a problem....any help is appreciated. I would like a simple but effective solution!
It's worth noting that if your Gmail has been hacked, it would likely have nothing to do with your MacBook. Hacking web based email is fairly common and it doesn't require any access to your machine whatsoever. In the same way that you can simply go to the Gmail webpage through any browser, any hacker can use the same method. It doesn't mean your machine has been compromised in any way (and it has likely not been). I have never received an email from Google of this nature. I have received notifications when someone has attempted to create an account with my name in which they basically say that there is no action required if you're the rightful owner.
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Received notification that password had been changed
Received notification that my password had been changed but it was not done by me. How do I ensure this doesn't happen again ?
I agree with TSN; it could be a phishing scam. Clear indications: if the email message does not mention your name (but "dear valuable customer").
Always check the originating IP address from where the message really came from (the 'From:' email header can easily be forged). -
I received a 1st Gen IPad from a supplier as a gift to promote their products. They used their Apple account to load the apps. I am not able to load my own apps because their apple user is the one that pops up. How can I change it to mine?
Set it up as new device, explained in this article, without using the backup afterwards:
How to back up your data and set up as a new device -
Good day I need the solution to the problem presented my iphone with ios upgrade from 7 to access any app, I get a message that says "log on to itunes to receive notifications"
After the iOS 7.0.2 update words with friends is not working for me either. When I attempt to open the app it just closes itself after a few seconds of being open. This happens every time I attempt to open it.
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I pre-ordered my iPhone 5 on 9/15 at 4am EST. It said shipping in 2 weeks with an delivery date of 10/5... yadda yadda yadda. This morning my order status showed as 'processing'. This afternoon it changed to 'preparing for delivery'. Is there a chance I will now receive before 10/5? Trying to plan accordingly. Thanks in advance for any info you can give.
I was in the same boat. I ordered @ 5:09AM EST on 9/14 and had the 10/5 delivery date. My status changed from processing to preparing to ship yesterday 9/21. I got an e-mail from Apple @ 4:22AM this morning 9/22 that it has shipped (along with the precious tracking #)! I would expect it would arrive by this Friday 9/28 at the latest.
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Why do I continue to receive notifications, even after I change my preferences?
why do I continue to receive notifications, even after I change my preferences? I had about 100 or so today. I switched all of my notification anwers to NO, as in , I don't want to receive any email from apple communities whatsoever. ??? Thanks.
You need to double check that you aren't subscribed to the community, not just to the question you asked. Go to the community that you are receiving the emails from and the same box called "Actions" will appear there just like it does next to the individual question. Make sure that you are not reciveing email notifications for that community. Probably the community where you asked your question. Typically that is what causes people to get 100's of email notifications. I think that this is not included in the tutorial so a lot of people miss it.
Hope that works for you.
laverne's mom -
How do I stop iCal from sending notifications everytime I change a shared calendar or event?
iCal sends a notification (not an email) to all users of a shared calendar whenever an event is added or edited. How do I stop that?
as far as i understand iCal it is on the "receivers/subscribers" side to deal with email-updates (and not on the "senders/changers" side):
snippet from my Re: How do you stop receiving notifications about updated calendar events? (there is a screenshot as well):
to NOT get email notification about updated events from a shared calendar you subscribed to you have to uncheck "events affect availability" in that calendars "info" (mac os X.7 and X.8: iCal —> calendars dropdown —> right click on the subscribed calendar —> choose "get info" from the context-menu —> uncheck "events affect availability")
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