57 lines
1.3 KiB
PHP
57 lines
1.3 KiB
PHP
<?php
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class Zoom extends Extension {
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public function receive_event($event) {
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if(is_a($event, 'DisplayingImageEvent')) {
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global $page;
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$page->add_main_block(new Block(null, $this->make_zoomer()));
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}
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if(is_a($event, 'SetupBuildingEvent')) {
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$sb = new SetupBlock("Image Zoom");
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$sb->add_label("Zoom by default: ");
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$sb->add_bool_option("image_zoom");
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$event->panel->add_main_block($sb);
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}
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if(is_a($event, 'ConfigSaveEvent')) {
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$event->config->set_bool("image_zoom", $_POST['image_zoom']);
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}
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}
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private function make_zoomer() {
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global $config;
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$default = $config->get_bool("image_zoom") ? "scale(img);" : "";
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return <<<EOD
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<script type="text/javascript">
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img = byId("main_image");
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img.onclick = function() {scale(img);};
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msg_div = document.createElement("div");
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msg_div.id = "msg_div";
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msg_div.appendChild(document.createTextNode("Note: Image has been scaled to fit the screen; click to enlarge"));
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msg_div.style.display="none";
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img.parentNode.insertBefore(msg_div, img);
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orig_width = "";
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function scale(img) {
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if(img.style.width != "90%") {
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origwidth = img.style.width;
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img.style.width = "90%";
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msg_div.style.display = "block";
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}
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else {
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img.style.width = origwidth;
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msg_div.style.display = "none";
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}
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}
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$default
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</script>
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EOD;
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}
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}
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add_event_listener(new Zoom());
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?>
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