pointer events vs mouse events
The application works, but the extra work seems unnecessary. IE10 provides a MSGesture object thatâs going to help us.
More information on Preventing the touch default). Or use a polyfill to handle all the events. Currently, only IE supports the Pointer Events API. It will then trigger one of these events: MSGestureTap, MSGestureHold, MSGestureStart, MSGestureChange, MSGestureEnd, MSInertiaStart. As we move the mouse, a line is drawn on the canvas between the current and the previous mouse position. // we're preventing the default behavior, // You need to first register to MSPointerDown to be able to You will have the X & Y coordinates of the screen as an output.
In the pointerHandler function we can grab the coordinates of the pointer event: And we make sure that the init function is called after the page has loaded with: And now we’re ready to go. MSCSSMatrix is indeed representing a 4Ã4 homogeneous matrix that enables Document Object Model (DOM) scripting access to CSS 2-D and 3-D Transforms functionality. It offers advantages over Touch Events in its unified approach to touch, mouse and pen inputs and promises to make life easier for developers by relieving them from responsibility of taking care of some of the not-so-interesting details of supporting various different input types in their webapps. Yet there is growing support (and willingness) to standardize. Check out his article to discover and understand how it works. In conclusion, if youâd like to handle all these cool gestures to the previous samples, register to the event like this: Try to move and throw the image inside the black area with one or more fingers.
The pointer attributes we are most interested in are: There are a few interesting things to note here: The main event types defined by the PointerEvent interface are: For comparison, the following table shows the corresponding events from each of these input related APIs.
It is less well supported than the Touch Events API, although support is growing, with all the major browsers working on an implementation, except for Apple’s Safari. Pointer Events changes this.
Plus there will be extra effort in future code maintenance. In this example, we define a function draw which draws a rectangle on the canvas with the following code: There is also a new function getOffset which is applied to the pointer’s coordinates (this is explained below).
So we have to access the original event object through the originalEvent property of the jQuery event object.
If not, remove them. © 2020 Afilias Technologies Ltd. All rights reserved. Next, we’ll build on this, and instead of displaying the numeric coordinates, we’ll display a dot at the pointer’s coordinates.
As I mentioned in the introduction of this article, Microsoft recently submitted the MSPointer Events specification to W3C for standardization.
Pointer Events are supported in all browsers except Safari. // Event handler called for each pointerdown event: //Helper function to get correct page offset for the Pointer coords, //Set last point to null to end our pointer path, //Stop tracking the pointermove (and mousemove) events, //Key the colour based on the id of the Pointer, // Get the id of the pointer associated with the event, horizontal coordinate of point relative to viewport, excluding scroll offset, vertical coordinate of point relative to viewport, excluding scroll offset, horizontal coordinate of point relative to page, including scroll offset, vertical coordinate of point relative to page, including scroll offset, angle of tilt of stylus between Z and X axes, where X and Y plane is on the surface of the screen, angle of tilt of stylus between Z and Y axes, where X and Y plane is on the surface of the screen, is this the main Pointer for a pointer type, pointer moves over an element (enters its hit test boundaries), pointer moves over an element or one of its descendants. For instance, in the previous sample, change this line of code: Step 2: using MSPointerMove instead of mousemove. As youâre probably already aware, the best approach to handle multi-browsers support is features detection. â MSGesture sample 1: MSGestureHold handler // provided by dynamic gesture recognition But what about mousemove?
Note: the examples in this article implement fallback for mouse events, but not for touch events.
If you have a touch screen, try to interact with the canvas to check by yourself the current behavior: Default Sample : Default behavior if you do nothing. But it will be implemented in Safari version 13. â Try some awesome games in IE10 with Touch: â Contre Jour and read a very interesting Behind The Scenes article. Rick Byers - Nov 4, 2014. // Drawing in red with a square of 10, // A pen was used Next a little JavaScript to add an event listener to our pointer area, and attach a handler function, called pointerHandler.
Thatâs cool! Android supports stylus devices (eg. While the Touch Events API was defined in terms of Touches, the Pointer Events API is defined in terms of Pointers, where a Pointer is defined as: a hardware agnostic representation of input devices that can target a specific coordinate (or set of coordinates) on a screen.
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