46 lines
1.1 KiB
PHP
46 lines
1.1 KiB
PHP
<?php
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class ZoomTheme extends Themelet {
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public function display_zoomer(Page $page, Image $image, $zoom_by_default) {
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$page->add_block(new Block(null, $this->make_zoomer($image->width, $zoom_by_default)));
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}
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protected function make_zoomer($image_width, $zoom_by_default) {
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global $config;
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$default = $zoom_by_default ? "scale(img);" : "";
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return <<<EOD
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<script type="text/javascript">
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img = document.getElementById("main_image");
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if(img) {
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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 = $image_width;
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$default
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}
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function scale(img) {
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if(orig_width >= img.parentNode.clientWidth * 0.9) {
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if(img.style.width != "90%") {
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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 = orig_width + 'px';
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msg_div.style.display = "none";
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}
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}
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}
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</script>
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EOD;
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}
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}
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?>
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