The Wiki Help API allows developers to create context driven help pages for each screen. The API exports screen and field information, which can be used to determine which help page to load. Wiki sites are often used for help, because they're designed for easy contribution. A Wiki is also useful with Profound UI driven screens, because you can load different help pages by passing different text to the URL to load different pages. However, not just Wikis, but any sites that accept URL parameter strings can be setup to host the help documentation.
The API allows you to create two different types of help: screen-level or field-level.
The WIki Help API became available with Profound UI Version 5, Fix Pack 3.0.
Screen-Level help is intended to be used when your help website uses a different help page for each screen.
To setup help pages that describe an entire screen, not each specific widget, you might use the API function, pui.wikihelp.getScreenInfo(). getScreenInfo() returns an object with the following members:
- formats - An array of strings naming the screen's current record formats.
- dspf - The name of the display file.
If your help pages
Field-level help is designed to be used when your help site uses a different page for each field on a screen. Also, some pages might show multiple fields on a help page, and passing some text to the URL causes the page to scroll to the appropriate field. For those pages, field-level help is useful.
The field-level help creates overlays for each field that the user clicks to load a help page. For this feature, you'll need to call API functions to enable and disable the help, write a click event handler, and add custom CSS for the overlay. You as the developer must provide the interface to toggle the help overlays on and off. Some example interfaces are given below.
You can optionally add some text or an image to the overlays.
To enable the field help overlays, call pui.wikihelp.overlayOn(). A "div" element is placed over each field on the page for the current record formats.
Call pui.wikihelp.overlayOff() to hide the overlays.
The first example places a toggle button in the top-right corner of the page. Clicking the button toggles the help overlay on or off.
Note: pui.onload is called after the record format is rendered on the page.
The next example toggles the help overlay when the F1 key is pressed.
By default, help overlays are drawn for every visible widget. However, not every widget needs an explanation–some may exist for style. Thus, overlaying those widgets can clutter the help system and confuse the user.
To solve the cluttered appearance, you can limit which widgets get an overlay by defining a pui.wikihelp.skipItem function. This function gets certain widget information passed by parameter, and it should return true when the widget should not get a help overlay.
The object passed to skipItem includes the following properties:
- dspf - the name of the display file that is currently rendered.
- recfmt - the Record Format name currently active.
- fieldId - the ID attribute of the widget.
- field type - the widget field type; e.g. grid, textbox, menu, hyperlink, etc.
- fieldName - If the widget's value property is bound, then fieldName is the name of the bound RPG field. If the value property is not bound, then fieldName is an empty string.
skipItem is called when the overlays are being generated: on the first call to pui.wikihelp.overlayOn. skipItem is called on each widget except layouts, panels, and hidden elements.
(skipItem is available with Profound UI Version 5, Fix Pack 7.0 and later.)
Click Event Handler
To handle click events, create a function named, pui.wikihelp.onclick, and add it to the custom js folder in your Profound installation's IFS directory. For example, create a file named, /profoundui/userdata/custom/js/wikiHelp.js.
The function has one parameter, an object with the following members:
- dspf - The display file name.
- recfmt - The record format of the field that was clicked.
- fieldId - The ID of the clicked field.
- fieldName - The name of a bound variable for the clicked field, or an empty string if the field is unbound.
An example handler function is provided below.
By default the overlays have no style, so they are transparent. To style the overlays, add a stylesheet to the custom css folder in your Profound installation's IFS directory. For example, create /profoundui/userdata/custom/css/wikiHelp.css. Each overlay has the html class name, "pui-wikih-overlay", so create a CSS rule for that class. Some example CSS is included below:
Blue Transparent overlay on a subfile grid:
Note: for Internet Explorer (IE) browsers, the overlay must have a background-color style. Otherwise, IE cannot capture mouse clicks on the overlay, and the feature doesn't work.
Adding Text to the Overlay
By default the overlay has no text. You can specify a text string that appears in each overlay box. In your custom js file, set pui.wikihelp.overlayText to some string. For example:
By default, the string's font size changes proportionally to the overlay box size. You can disable automatic font re-sizing by setting pui.wikihelp.fontScale to false.
Alternately, you may want to adjust the scaling factor if your text is bleeding outside the overlay. This may happen for non-latin characters:
The default scaling factor (1.56) works well for Latin alphabet strings 1 to 4 characters long in Helvetica font.
Font size is proportional to widget size:
Default font scale is too large for wide characters:
Font scale of 1.0 fixes this particular string:
Adding an Image to the Overlay
To add an image to the help overlay, set pui.wikihelp.image to a path string. For example,
By default the image resizes into square dimensions. The smallest side of the overlay box determines the image size. If you want the image to use the same rectangular dimensions as the overlay box, then set pui.wikihelp.imageSquare to false.