Pageimage::focus() method

Get or set focus area for crops to use

These settings are used by $this->size() calls that specify BOTH width AND height. Focus helps to ensure that the important subject of the photo is not cropped out when the requested size proportion differs from the original image proportion. For example, not chopping off someone’s head in a photo.

Default behavior is to return an array containing "top" and "left" indexes, representing percentages from top and left. When arguments are specified, you are either setting the top/left percentages, or unsetting focus, or getting focus in different ways, described in arguments below.

A zoom argument/property is also present here for future use, but not currently supported.

Usage

// basic usage
$array = $pageimage->focus();

// usage with all arguments
$array = $pageimage->focus($top = null, $left = null, $zoom = null);

Arguments

NameType(s)Description
top (optional)null, float, int, array, false

Omit to get focus array, or specify one of the following:

  • GET: Omit all arguments to get focus array (default behavior).
  • GET: Specify boolean TRUE to return TRUE if focus data is present or FALSE if not.
  • GET: Specify integer 1 to make this method return pixel dimensions rather than percentages.
  • SET: Specify both $top and $left arguments to set (values assumed to be percentages).
  • SET: Specify array containing "top" and "left" indexes to set (percentages).
  • SET: Specify array where index 0 is top and index 1 is left (percentages).
  • SET: Specify string in the format "top left", i.e. "25 70" or "top left zoom", i.e. "25 70 30" (percentages).
  • SET: Specify CSV key=value string in the format "top=25%, left=70%, zoom=30%" in any order
  • UNSET: Specify boolean false to remove any focus values.
left (optional)null, float, int

Set left value (when $top value is float|int)

  • This argument is only used when setting focus and should be omitted otherwise.
zoom (optional)null, int

Zoom percent (not currently supported)

Return value

array bool Pageimage

Returns one of the following:

  • When getting returns array containing top, left and default properties.
  • When TRUE was specified for the $top argument, it returns either TRUE (has focus) or FALSE (does not have).
  • When setting or unsetting returns $this.

Pageimage methods and properties

API reference based on ProcessWire core version 3.0.137

Twitter updates

  • ProcessWire 3.0.146 on the dev branch contains about 22 commits with a combination of useful upgrades and issue report resolutions, more details in this forum post: More
    22 November 2019
  • ProcessWire 3.0.144 and 3.0.145 add improved field template context override settings and include a new Inputfields API, along with numerous other issue fixes, optimizations and improvements to the core. More
    8 November 2019
  • ProcessWire 3.0.144 core updates: Upgraded overrides section in the field editor, a new Inputfields JS API, and more— More
    1 November 2019

Latest news

  • ProcessWire Weekly #290
    In the 290th issue of ProcessWire Weekly we're going to introduce the latest addition to the ProDevTools module package and a third party image picker field from gebeer, check out a new site of the week, and more. Read on!
    Weekly.pw / 30 November 2019
  • New User Activity module
    Blog / 29 November 2019
  • Subscribe to weekly ProcessWire news

“The end client and designer love the ease at which they can update the website. Training beyond how to log in wasn’t even necessary since ProcessWire’s default interface is straightforward.” —Jonathan Lahijani