How do I find the cursor position in canvas?

Just call it from your event with the event and canvas as arguments. It returns an object with x and y for the mouse positions. As the mouse position you are getting is relative to the client window you’ll have to subtract the position of the canvas element to convert it relative to the element itself.

Does Canvas have mouse tracking?

To get the mouse coordinates relative to an HTML5 Canvas, we can create a getMousePos() method which returns the mouse coordinates based on the position of the client mouse and the position of the canvas obtained from the getBoundingClientRect() method of the window object.

Can you move mouse with JavaScript?

You can’t move the mouse pointer using javascript, and thus for obvious security reasons. The best way to achieve this effect would be to actually place the control under the mouse pointer.

How can use mouse event in JavaScript?

Discover the basics of working with mouse events in JavaScript

  1. mousedown the mouse button was pressed.
  2. mouseup the mouse button was released.
  3. click a click event.
  4. dblclick a double click event.
  5. mousemove when the mouse is moved over the element.
  6. mouseover when the mouse is moved over an element or one of its child elements.

How do you find XY coordinates on a mouse?

For Firefox, you’ll need to hold down the ‘Shift’ and ‘Alt’ keys simultaneously, along with the ‘z’ accesskey. This nifty functionality is achieved using Access Keys. As you move your cursor (aka, mouse pointer) around on this webpage, the X and Y coordinates are indicated in a DHTML layer near the cursor.

Can canvas detect right click?

In a desktop Canvas control you have two ways to handle a right mouse button press. The most common situation is that you want to show a menu when the right mouse button is pressed. You can do this using the ConstructContextualMenu and ContextualMenuAction events.

How do you know if a mouse is over an element?

You can simply use the CSS :hover pseudo-class selector in combination with the jQuery mousemove() to check whether the mouse is over an element or not in jQuery. The jQuery code in the following example will display a hint message on the web page when you place or remove the mouse pointer over the DIV element’s box.

What happens when you click a mouse?

It’s called an interrupt. The mouse or hardware device will send a signal directly to the processor when an event occurs. The Processor must then handle the signal, immediately. This means the processor will pause in whatever function it is running, saving where it is at in the code, and handle the click right then.

How mouse events are handled?

Called when the mouse button is pressed while the mouse cursor is on a component and the mouse is moved while the mouse button remains pressed. All move events are sent to the component over which the mouse is currently positioned. Each of the mouse event-handling methods takes a MouseEvent object as its argument.

How do I get the XY coordinates of a mouse in Chrome?


  1. Using the Chrome browser, right click / control click anywhere inside your content area and select Inspect Element.
  2. In the new window that appears in the bottom of your browser, move your mouse within the code until you see the content area highlighted (usually in blue).

How to get the relative position of the mouse in JavaScript?

If you don’t use relative position the attributes offsetX and offsetY can be misleading. You should use the function: canvas.getBoundingClientRect () from the canvas API. set to your canvas tag, in order to get the relative mouse position inside the canvas.

How to change the mouse position on the canvas?

The e.clientX and e.clientY will get the mouse positions relative to the top of the document, to change this to be based on the top of the canvas we subtract the left and right positions of the canvas from the client X and Y.

How do I get the coordinates of a mouse click?

Using jQuery in 2016, to get click coordinates relative to the canvas, I do: This works since both canvas offset () and jqEvent.pageX/Y are relative to the document regardless of scroll position. Note that if your canvas is scaled then these coordinates are not the same as canvas logical coordinates.

How to draw on canvas with mouse in JavaScript?

Now on to the fun part: the JavaScript code to track our mouse movements for drawing on the canvas. Let’s start by defining our JS variables: We need to get the canvas elemnt and then retrieve it based on it’s ID. Then we get the context of the canvas (that’s where we actually draw on). Next, we define our base coordinates.