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<?php
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// $Header: /cvsroot/html2ps/box.button.php,v 1.29 2007/01/24 18:55:43 Konstantin Exp $
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/**
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* @package HTML2PS
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* @subpackage Document
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*
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* This file contains the class desribing layout and behavior of 'input type="button"'
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* elements
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*/
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/**
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* @package HTML2PS
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* @subpackage Document
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*
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* The ButtonBox class desribes the HTML buttons layout. (Note that
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* button elements have 'display' CSS property set to HTML2PS-specific
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* '-button' value )
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*
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* @link http://www.w3.org/TR/html4/interact/forms.html#h-17.4 HTML 4.01 The INPUT element
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*/
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class ButtonBox extends InlineControlBox {
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function ButtonBox() {
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$this->InlineControlBox();
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}
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function get_max_width(&$context, $limit = 10E6) {
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return
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GenericContainerBox::get_max_width($context, $limit);
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}
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/**
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* Create a new button element from the DOM tree element
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*
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* @param DOMElement $root pointer to the DOM tree element corresponding to the button.
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*
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* @return ButtonBox new button element
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*/
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function &create(&$root, &$pipeline) {
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/**
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* Button text is defined by its 'value' attrubute;
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* if this attribute is not specified, we should provide some
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* appropriate defaults depending on the exact button type:
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* reset, submit or generic button.
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*
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* Default button text values are specified in config file config.inc.php.
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*
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* @see config.inc.php
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* @see DEFAULT_SUBMIT_TEXT
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* @see DEFAULT_RESET_TEXT
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* @see DEFAULT_BUTTON_TEXT
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*/
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if ($root->has_attribute("value")) {
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$text = $root->get_attribute("value");
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} else {
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$text = DEFAULT_BUTTON_TEXT;
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};
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$box =& new ButtonBox();
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$box->readCSS($pipeline->get_current_css_state());
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/**
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* If button width is not constrained, then we'll add some space around the button text
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*/
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$text = " ".$text." ";
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$box->_setup($text, $pipeline);
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return $box;
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}
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function _setup($text, &$pipeline) {
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$this->setup_content($text, $pipeline);
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/**
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* Button height includes vertical padding (e.g. the following two buttons
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* <input type="button" value="test" style="padding: 10px; height: 50px;"/>
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* <input type="button" value="test" style="padding: 0px; height: 30px;"/>
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* are render by browsers with the same height!), so we'll need to adjust the
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* height constraint, subtracting the vertical padding value from the constraint
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* height value.
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*/
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$hc = $this->get_height_constraint();
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if (!is_null($hc->constant)) {
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$hc->constant[0] -= $this->get_padding_top() + $this->get_padding_bottom();
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};
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$this->put_height_constraint($hc);
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}
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/**
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* Render the form field corresponding to this button
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* (Will be overridden by subclasses; they may render more specific button types)
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*
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* @param OutputDriver $driver The output driver object
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*/
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function _render_field(&$driver) {
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$driver->field_pushbutton($this->get_left_padding(),
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$this->get_top_padding(),
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$this->get_width() + $this->get_padding_left() + $this->get_padding_right(),
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$this->get_height() + $this->get_padding_top() + $this->get_padding_bottom());
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}
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/**
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* Render the button using the specified output driver
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*
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* @param OutputDriver $driver The output driver object
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*
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* @return boolean flag indicating an error (null value) or success (true)
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*/
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function show(&$driver) {
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/**
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* Set the baseline of a button box so that the button text will be aligned with
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* the line box baseline
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*/
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$this->default_baseline = $this->content[0]->baseline + $this->get_extra_top();
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$this->baseline = $this->content[0]->baseline + $this->get_extra_top();
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/**
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* Render the interactive button (if requested and possible)
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*/
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if ($GLOBALS['g_config']['renderforms']) {
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$status = GenericContainerBox::show($driver);
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$this->_render_field($driver);
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} else {
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$status = GenericContainerBox::show($driver);
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};
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return $status;
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}
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}
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?>
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