<oPS>
The Presentation Space object for rendering.
Method XbpHTMLStyle():draw() Foundation
Draws HTML markup into a Presentation Space.
Syntax
:draw( <oPS>, <aRect>, <cHTML>, [<nState>] ) --> lSuccess
Parameters
<cHTML>
A character string with the HTML markup. The string must be in ANSI encoding. Character strings using an OEM character set must first be converted withConvToAnsiCP().
<aRect>
An array with four elements which specify the starting and ending points of the output rectangle.
<nState>
A numeric value which specifies one of the draw states defined for Xbase Parts such as XBP_DRAWSTATE_DISABLED, for example. Different draw states can
activate different styling in the CSS specified when initializing the HTML style object, and hence can produce different output when calling :draw(). Also see the :init() method for further information.
Return
Description
The :draw() method can be used to draw arbitrary HTML markup into the Presentation Space passed in the <oPS>parameter. <aRect> specifies the output area for the operation. If the representation of the HTML markup exceeds the bounds defined for the output area, the respective content is clipped.
:draw() first computes the representation of the HTML markup, then draws it to the Presentation Space. If CSS styling information was specified when instantiating the XbpHTMLStyle object by calling the method :new(), the CSS is applied to the HTML content when the representation is computed.
The <nState> parameter can be used to activate dedicated CSS styling with respect to a certain draw state. For this, the desired representation must be defined in the CSS using a set of pre-defined CSS selectors. The selectors are activated by the :draw() method depending on the value passed in the <nState> parameter. The following table lists the CSS selectors defined along with their associated draw state.
CSS selectors with their associated draw state
| CSS selector | Draw state |
|---|---|
| (none) | XBP_DRAWSTATE_NORMAL |
| :hover | XBP_DRAWSTATE_HOT |
| :disabled | XBP_DRAWSTATE_DISABLED |
| :focus *) | XBP_DRAWSTATE_FOCUS |
| :active | XBP_DRAWSTATE_SELECTED |
|
|
In addition, a set of pre-defined CSS classes exist which can also be activated using the <nState> parameter. These CSS classes represent object draw states as well as standard UI elements such as the edit field of a combo box.
Pre-defined CSS-classes with their associated draw state
| CSS class | Draw state |
|---|---|
| focused | XBP_DRAWSTATE_FOCUS |
| comboboxedit | XBP_DRAWSTATE_COMBOBOXEDIT |
| header | XBP_DRAWSTATE_HEADER |
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