c# create and print barcode Adding a Stylesheet to the Options Page in Font

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Adding a Stylesheet to the Options Page
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Sometimes you need to add styles to your options pages. You could do everything with inline styles, but that s hardly efficient! Listing 7-33 shows the function that will display the styles in the options page s <head> area. In this case, you have very little to add, so you won t go to the trouble of creating a separate stylesheet for Simplex Flex. However, it would be easy to do so; just include a link to a separate stylesheet, adminstyles.css, which would be located in the simplex-flex theme directory. Listing 7-33. Styles for the options page function simplex_flex_admin_css() { > <style type="text/css"> textarea { width: 32em; height: 8em; } </style> <link rel="stylesheet" type="text/css" src="< php bloginfo('stylesheet_directory'); >/admin-styles.css"> < php }
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Now you have to add this function to the admin pages somehow. You could use the admin_head() hook, but that puts the styles on every page. It would be much better to add it only to the theme options page. In addition to admin_head(), there s another hook that s specific to each page, admin_head-filename. The filename should include the extension. For example, if you wanted to add a stylesheet to the Dashboard, the hook would be called admin_head-index.php. Now you just need the name of the current theme options page, without the preceding path that you d get with the __FILE__ constant. As it turns out, that s easy. The add_theme_page() function returns the file name of the theme page that gets added. In Listing 7-29, you didn t need the returned value, but now you can make use of it. Listing 7-34 shows the necessary changes to the simplex_menu() function. Listing 7-34. Adding a stylesheet to the options page function simplex_menu() { $file = add_theme_page('Simplex Flex Options', 'Simplex Options', 'edit_theme_options', __FILE__, 'simplex_options_page'); add_action("admin_head-$file", 'simplex_flex_admin_css'); register_setting('simplex_options', 'simplex_options'); // set defaults $options = array( 'width' => 'flex', 'cols' => '3', 'sitename' => 'yes', 'css' => '' ); add_option('simplex_options', $options, '', 'yes'); } add_action('admin_menu', 'simplex_menu');
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Listing 7-35 shows the complete theme options code, which results in the screen in Figure 7-7. In Simplex Flex, this code appears in functions.php, along with the widget definitions, header and background image support, and other theme functions. Listing 7-35. A complete theme options page < php function simplex_menu() { $css = add_theme_page('Simplex Flex Options', 'Simplex Options', 'edit_theme_options', __FILE__, 'simplex_options_page'); add_action("admin_head-$css", 'simplex_flex_admin_css'); register_setting('simplex_options', 'simplex_options'); // set defaults $options = array( 'width' => 'flex', 'cols' => '3',
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'sitename' => 'yes', 'css' => '' ); add_option('simplex_options', $options, '', 'yes'); } add_action('admin_menu', 'simplex_menu'); function simplex_options_page() { > <div class="wrap"> <h2>Simplex Flex Options</h2> <form method="post" action="options.php"> < php settings_fields('simplex_options'); > < php $options = get_option('simplex_options'); > <table class="form-table"> <tr valign="top"> <th scope="row">Width</th> <td><label><input type="radio" name="simplex_options[width]" < php checked('fixed', $options['width']); > value="fixed" /> Fixed</label> <label><input type="radio" name="simplex_options[width]" < php checked('flex', $options['width']); > value="flex" /> Flex</label> </td> </tr> <tr valign="top"> <th scope="row">Columns</th> <td><label><input type="radio" name="simplex_options[cols]" < php checked('left2', $options['cols']); > value="left2" /> 2 columns, sidebar left</label> <label><input type="radio" name="simplex_options[cols]" < php checked('right2', $options['cols']); > value="right2" /> 2 columns, sidebar right</label> <label><input type="radio" name="simplex_options[cols]" < php checked('col3', $options['cols']); > value="col3" /> 3 columns, sidebars on either side</label> </td> </tr> <tr valign="top"> <th scope="row">Header text and image</th> <td><label><input type="checkbox" name="simplex_options[sitename]" < php checked('yes', $options['sitename']); > value="yes" /> Display site name and description superimposed over the header image </label> </td> </tr> <tr valign="top"> <th scope="row">Custom styles</th> <td><label>Enter your CSS:</label><br /> <textarea name="simplex_options[css]">< php echo $options['css']; ></textarea> </td> </tr> </table> <p class="submit"> <input type="submit" class="button-primary" value="< php _e('Save Changes') >" /> </p> </form>
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</div> < php } > Be sure your theme works correctly with the default options! Many users will activate the theme and go on their merry way without ever looking at the options screen.
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