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Sub forum :. Move this topic Cancel. General Discussion Other. Hi there, how could i get the coordinates of exactly two left mouse button clicks? And, after that, get the coordinates x2,y2 of the second click left button. Replies 5. Re: Mouse click 6 months ago. Leave a comment on pauline's reply. Peeps here are fast!
Anyways, this is what I was doing some minutes ago:. Re: Re: Mouse click 6 months ago. I found the 2nd more appropriate to my purposes. Only one question: whenever you declare a variable for instance, float x1 and float y1do they carry any value? I changed "point" to ellipse.
Before I click, the programm starts with an ellipse centered in 0,0.
How can I change that? Leave a comment on GoToLoop's reply. And Object variables, ie non-primitive, start as null. Before I click, the program starts with an ellipse centered in 0,0.
Let's say for starters! Moved here from Programming Questions because you show now code. Changed topic type from Discussion because you actually ask a question To add on what GoToLoop said, global variables are fields, so they have a default value as explained. Local variables must be defined with an initial value, in general.The screen forms a bridge between our bodies and the realm of circuits and electricity inside computers.
We control elements on screen through a variety of devices such as touch pads, trackballs, and joysticks, but the keyboard and mouse remain the most common input devices for desktop computers. The computer mouse dates back to the late s, when Douglas Engelbart presented the device as an element of the oN-Line System NLSone of the first computer systems with a video display.
The design of the mouse has gone through many revisions in the last forty years, but its function has remained the same. In Engelbart's original patent application in he referred to the mouse as an "X-Y position indicator," and this still accurately, but dryly, defines its contemporary use. The physical mouse object is used to control the position of the cursor on screen and to select interface elements.
The cursor position is read by computer programs as two numbers, the x-coordinate and the y-coordinate. These numbers can be used to control attributes of elements on screen. If these coordinates are collected and analyzed, they can be used to extract higher-level information such as the speed and direction of the mouse. This data can in turn be used for gesture and pattern recognition.
Keyboards are typically used to input characters for composing documents, email, and instant messages, but the keyboard has potential for use beyond its original intent. The migration of the keyboard from typewriter to computer expanded its function to enable launching software, moving through the menus of software applications, and navigating 3D environments in games.
When writing your own software, you have the freedom to use the keyboard data any way you wish. For example, basic information such as the speed and rhythm of the fingers can be determined by the rate at which keys are pressed. This information could control the speed of an event or the quality of motion. It's also possible to ignore the characters printed on the keyboard itself and use the location of each key relative to the keyboard grid as a numeric position.
The modern computer keyboard is a direct descendant of the typewriter. The position of the keys on an English-language keyboard is inherited from early typewriters. It was developed for typewriters to put physical distance between frequently typed letter pairs, helping reduce the likelihood of the typebars colliding and jamming as they hit the ribbon.
This more than one-hundred-year-old mechanical legacy still affects how we write software today. The variables mouseX and mouseY note the capital X and Y store the x-coordinate and y-coordinate of the cursor relative to the origin in the upper-left corner of the display window. To see the actual values produced while moving the mouse, run this program to print the values to the screen:. When a program starts, the mouseX and mouseY values are 0. If the cursor moves into the display window, the values are set to the current position of the cursor.
If the cursor is at the left, the mouseX value is 0 and the value increases as the cursor moves to the right. If the cursor is at the top, the mouseY value is 0 and the value increases as the cursor moves down.
If mouseX and mouseY are used in programs without a draw or if noLoop is run in setupthe values will always be 0. The mouse position is most commonly used to control the location of visual elements on screen.
More interesting relations are created when the visual elements relate differently to the mouse values, rather than simply mimicking the current position.We are about to switch to a new forum software.
Until then we have removed the registration on this forum. I searched the intertubes high and low to find an answer, but either the answers where incomplete, obscure or deprecated.
How does the syntax in the class looks like because this seems to be a bit unusual? I am working the whole day already on this problem and still I cannot get any meaningful results, Its irritating It is usually done by using Booleans.
Now, in your class you can check if clicked. You need however to set this Boolean to false manually.
How to get mouseClicked() and others functional in a class?
Ater : Why are you adding an extra boolean? Why not just use the existing mousePressed variable? Can you post an MCVE showing what you're talking about? KevinWorkman : It is connected with the fact that mousePressed virable is true all the time mouse button is pressed.
A Simple Button for Processing Language Code
And this may last couple of frames. Usually, when you look for a click event, that means that you want the action to occur only once after button is pressed. That's where another boolean came from. Edit: And yeah, I find this system strange too. But it is only simple method to do it, as there is now mouseClicked virable in Processing. I think the goal may be achieved by creation of own threads, but I don't know yet how it is done.
If there is a simplier way, please, advice. I'm not really sure why you're talking about threads- it sounds like the OP is simply asking how to pass data into another class, but we can't really be sure until he posts an MCVE. The way I usually do it is to give each class that needs to respond to a mouse click a onClick function, and then call it from mousePressed :.
That isn't an MCVE, since it wouldn't compile- is this in its own tab, or is it inside the main sketch tab? OKay, I updated the pseudo code to something that actualy functions. Uh, don't bother. The variable mousePressed is global, and can be used anywhere, even within your own classes:.
Sorry for the late reply, but it does not seem to work this way when you use Intellij, I cannot seem to get it to work in this IDE as it does in Processing itself. Anyway, took Ater's advice and reverted back to the old method by passing a bool. When you work in Intellij or eclipse for example, if your class is not nested you still can of course a nice solution is to pass a reference to the PApplet, the context.
Now I can sanitize my code some more. Howdy, Stranger!Processing Forum. Recent Topics. Sub forum :. Move this topic Cancel. Programming Questions. I would like to know if it is possible to associate a mouse click event with an object because it was clicked over it.
I do not mean use the window coords and calculate whether it was over the object, so, I would presume that the coding for the mouse would have to be part of the object's class code. The end result would therefore be that the mouse coords returned would naturally be relative to the object, without any calculations. I could have made that simpler by asking whether object's can have mouse events as well as properties and methods.
Replies 7. Re: Mouse click on object 1 years ago. Leave a comment on kritzikratzi's reply. Thank you for your response. I have never heard of scenegraph. This makes me wonder whether I explained correctly.
I have looked at button as suggested and it appears not to be using the shapes as objects and so only suggests that it can be done the way I do not want to do it This is normal in for example Delphi and other oop languages and it can be done as an object event or an operating system event.
I hope I explained it wrongly!! Re: Re: Mouse click on object 1 years ago. Leave a comment on enonod's reply. I'm sure is not this that you want, is it? Leave a comment on v. Thank you kritzikra, I take on board your comments Being new to Processing, I cannot tell whether the mouse event is truly encapsulated but it does appear to be by looking at the coordinates. Each object should be able to pass back to me its own name, or in this case its array position to prove it is not a generic or global event.
Well Im a self learning and only tried programming in processing, so i can't tell you about encapsulation But as the array is constructed out side the class you cant get its id from inside unless you make something like:. Thanks v. Yes I was working on this when you replied and came up with the following which displays the name as the mouse hovers Topic Type : Discussions Questions. Change topic type Cancel.
Link this topic. Provide the permalink of a topic that is related to this topic.A button that can be placed in the application window of a Processing program processing. The button code allows the button to be drawn and checked to see if it has been clicked by a mouse. At this point in time Processing does not have any button controls as part of the language or built in libraries.
The code below is a class for a very simple button that should be easy for beginners in programming to understand, study and improve on. An example of using the button follows. This button class can be copied to any Processing sketch and then used in the sketch as demonstrated by the example that follows. This application uses the above Button class to create a button on the screen. When the mouse cursor is moved over the button, a square is drawn in the window, when the button is clicked, text is written to the text area console of the Processing IDE.
This video shows the example code running:. Like so you can cancel your input by dragging the cursor out of the button before releasing the mouse button. I use this class and its great How ever how can i make the button itself to change color if the mouse is over?
How can i change the fill inside the class? Your email address will not be published. Don't subscribe All Replies to my comments Notify me of followup comments via e-mail. You can also subscribe without commenting. Buttons in a Procesing Application. Leave a Reply Cancel reply Your email address will not be published. Leave this field empty.This sketch is created with an older version of Processing, and doesn't work on browsers anymore.
View Source Code. Drop files here or select. Also, many other sublime shortcuts are supported. Every time sketch is saved, a version history is created. You can view and restore below.
Save as Fork Save Submit. Sketches Start coding in seconds, experiment, and create. Explore Sketches Create a Sketch. Classes Teach coding, collaborate, and showcase class work. Explore Classes Create a Class. Archived Sketch This sketch is created with an older version of Processing, and doesn't work on browsers anymore. Count the Clicks! Count how many times the mouse was clicked. How to interact with it e. Tags e. Who can see your sketch? Who can see the code? Who can comment? Delete Sketch?
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Don't have an account yet? Join OpenProcessing.Processing Forum. Recent Topics. Sub forum :. Move this topic Cancel. Programming Questions. PVector or not. I know how to make the ellipse move in a straight line and the logic to make it do so. I cant figure out how to store a specific mouse coordinate without it always updating in the draw method. Replies 5. Re: how to store mouse coordinate for later use? Greetings, Chrisir.
Re: Re: how to store mouse coordinate for later use? Im going to work on this approach. I'll check back in when I can. Leave a comment on Chrisir's reply.
Just some quick tips: Basically, you have 2 behavior states: mouse coordinates are more than "dx, dy" distance away from point of origin mouse coordinates are within "dx, dy" distance zone from point of origin So you need a boolean variable to flag which state program is currently in and You need certain parts of your code to behave accordingly to that current state! Also, make a function which is responsible to keep checking which state the program is at!
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