In your case, everything is fine. It’s the object which publishes the events which keeps the targets of the event handlers live. So if I have: publisher.SomeEvent += target.DoSomething; then publisher has a reference to target but not the other way round. In your case, the publisher is going to be eligible for garbage collection … Read more
Short answer You can check which View currently has the focus to distinguish between user and program triggered events. EditText myEditText = (EditText) findViewById(R.id.myEditText); myEditText.addTextChangedListener(new TextWatcher() { @Override public void onTextChanged(CharSequence s, int start, int before, int count) { if (myEditText.hasFocus()) { // is only executed if the EditText was directly changed by the user … Read more
If you’re trying to catch the interrupt signal SIGINT, you don’t need to read from the keyboard. The process object of nodejs exposes an interrupt event: process.on(‘SIGINT’, function() { console.log(“Caught interrupt signal”); if (i_should_exit) process.exit(); }); Edit: doesn’t work on Windows without a workaround. See here
Timer.Elapsed expects method of specific signature (with arguments object and EventArgs). If you want to use your PlayMusicEvent method with additional argument evaluated during event registration, you can use lambda expression as an adapter: myTimer.Elapsed += new ElapsedEventHandler((sender, e) => PlayMusicEvent(sender, e, musicNote)); Edit: you can also use shorter version: myTimer.Elapsed += (sender, e) => … Read more
Let’s start by describing DOM elements’ event handling. DOM node event handling First of all you wouldn’t want to work with DOM node directly. Instead you probably would want to utilize Ext.Element interface. For the purpose of assigning event handlers, Element.addListener and Element.on (these are equivalent) were created. So, for example, if we have html: … Read more
Both handlers will run, the jQuery event model allows multiple handlers on one element, therefore a later handler does not override an older handler. The handlers will execute in the order in which they were bound.
Add Following Code @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.new_item: Intent i = new Intent(this,SecondActivity.class); this.startActivity(i); return true; default: return super.onOptionsItemSelected(item); } }
signal isn’t the most reliable way as it differs in implementations. I would recommend using sigaction. Tom’s code would now look like this : #include <signal.h> #include <stdlib.h> #include <stdio.h> #include <unistd.h> void my_handler(int s){ printf(“Caught signal %d\n”,s); exit(1); } int main(int argc,char** argv) { struct sigaction sigIntHandler; sigIntHandler.sa_handler = my_handler; sigemptyset(&sigIntHandler.sa_mask); sigIntHandler.sa_flags = 0; … Read more
Warning! This answer is now outdated. DOM Level 4 introduced MutationObserver, providing an effective replacement for the deprecated mutation events. See this answer to another question for a better solution than the one presented here. Seriously. Don’t poll the DOM every 100 milliseconds; it will waste CPU power and your users will hate you. Since … Read more
When you draw to a canvas element, you are simply drawing a bitmap in immediate mode. The elements (shapes, lines, images) that are drawn have no representation besides the pixels they use and their colour. Therefore, to get a click event on a canvas element (shape), you need to capture click events on the canvas … Read more