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Fixes from Dan Stowell to support thumbnail images, with some modifications

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from me to remove unnecessary messages.    bug 5011
This commit is contained in:
moodler 2006-04-06 16:20:50 +00:00
parent d9d282e493
commit b4f3e56cc1
1 changed files with 129 additions and 3 deletions
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132
mod/data/field/picture/field.class.php
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@ -57,8 +57,7 @@ class data_field_picture extends data_field_file {
}
}
$str = '';
$str .= '<div title="'.$this->field->description.'">';
$str = '<div title="'.$this->field->description.'">';
$str .= '<input type="hidden" name ="field_'.$this->field->id.'_file" id="field_'.$this->field->id.'_file" value="fakevalue" />';
$str .= get_string('picture','data'). ': <input type="file" name ="field_'.$this->field->id.'" id="field_'.$this->field->id.'" /><br />';
$str .= get_string('optionaldescription','data') .': <input type="text" name="field_'
@ -89,18 +88,21 @@ class data_field_picture extends data_field_file {
$src = $contents[0];
$path = $this->data->course.'/'.$CFG->moddata.'/data/'.$this->data->id.'/'.$this->field->id.'/'.$recordid;
$thumbnaillocation = $CFG->dataroot .'/'.$this->data->course.'/'.$CFG->moddata.'/data/'.$this->data->id.'/'.$this->field->id.'/'.$recordid.'/thumb/'.$src;
if ($CFG->slasharguments) {
$source = $CFG->wwwroot.'/file.php/'.$path.'/'.$src;
$thumbnailsource = file_exists($thumbnaillocation) ? $CFG->wwwroot.'/file.php/'.$path.'/thumb/'.$src : $source;
} else {
$source = $CFG->wwwroot.'/file.php?file=/'.$path.'/'.$src;
$thumbnailsource = file_exists($thumbnaillocation) ? $CFG->wwwroot.'/file.php?file=/'.$path.'/thumb/'.$src : $source;
}
if ($template == 'listtemplate') {
$width = $this->field->param4 ? ' width="'.$this->field->param4.'" ' : ' ';
$height = $this->field->param5 ? ' height="'.$this->field->param5.'" ' : ' ';
$str = '<a href="view.php?d='.$this->field->dataid.'&amp;rid='.$recordid.'"><img '.
$width.$height.' src="'.$source.'" alt="'.$alt.'" title="'.$title.'" border="0" /></a>';
$width.$height.' src="'.$thumbnailsource.'" alt="'.$alt.'" title="'.$title.'" border="0" /></a>';
} else {
$width = $this->field->param1 ? ' width="'.$this->field->param1.'" ':' ';
$height = $this->field->param2 ? ' height="'.$this->field->param2.'" ':' ';
@ -111,6 +113,130 @@ class data_field_picture extends data_field_file {
return false;
}
function update_field() {
// Get the old field data so that we can check whether the thumbnail dimensions have changed
$oldfield = clone($this->field);
if (!parent::update_field()) {
return false;
}
// Have the thumbnail dimensions changed?
if ($oldfield && ($oldfield->param4 != $this->field->param4 || $oldfield->param5 != $this->field->param5)) {
//print_simple_box(get_string('pleasewait', 'data');
//echo "\n\n"; // To make sure that ob_flush() has the desired effect
//ob_flush();
// Check through all existing records and update the thumbnail
if ($recordset = get_recordset('data_content', 'fieldid', $this->field->id)) {
while ($row = $recordset->FetchNextObject()) {
$this->update_thumbnail($row->RECORDID);
}
}
}
return true;
}
function update_content($recordid, $value, $name) {
parent::update_content($recordid, $value, $name);
$this->update_thumbnail($recordid); // Regenerate the thumbnail
}
/**
* (Re)generate thumbnail image according to the dimensions specified in the field settings.
* If thumbnail width and height are BOTH not specified then no thumbnail is generated, and
* additionally an attempted delete of the existing thumbnail takes place.
*/
function update_thumbnail($recordid) {
global $CFG;
require_once($CFG->libdir . '/gdlib.php');
$content = get_record('data_content','fieldid', $this->field->id, 'recordid', $recordid);
$datalocation = $CFG->dataroot .'/'.$this->data->course.'/'.$CFG->moddata.'/data/'.$this->data->id.'/'.$this->field->id.'/'.$recordid;
$originalfile = $datalocation.'/'.$content->content;
if (!file_exists($datalocation.'/thumb')) {
mkdir($datalocation.'/thumb', 0777);
}
$thumbnaillocation = $datalocation.'/thumb/'.$content->content;
$imageinfo = GetImageSize($originalfile);
$image->width = $imageinfo[0];
$image->height = $imageinfo[1];
$image->type = $imageinfo[2];
switch ($image->type) {
case 1:
if (function_exists('ImageCreateFromGIF')) {
$im = ImageCreateFromGIF($originalfile);
} else {
return;
}
break;
case 2:
if (function_exists('ImageCreateFromJPEG')) {
$im = ImageCreateFromJPEG($originalfile);
} else {
return;
}
break;
case 3:
if (function_exists('ImageCreateFromPNG')) {
$im = ImageCreateFromPNG($originalfile);
} else {
return;
}
break;
}
$thumbwidth = $this->field->param4;
$thumbheight = $this->field->param5;
if ($thumbwidth || $thumbheight) { // Only if either width OR height specified do we want a thumbnail
$wcrop = $image->width;
$hcrop = $image->height;
if ($thumbwidth && !$thumbheight) {
$thumbheight = $image->height * $thumbwidth / $image->width;
} else if($thumbheight && !$thumbwidth) {
$thumbheight = $image->width * $thumbheight / $image->height;
} else { // BOTH are set - may need to crop if aspect ratio differs
$hratio = $image->height / $thumbheight;
$wratio = $image->width / $thumbwidth;
if ($wratio > $hratio) { // Crop the width
$wcrop = intval($thumbwidth * $hratio);
} elseif($hratio > $wratio) { // Crop the height
$hcrop = intval($thumbheight * $wratio);
}
}
// At this point both $thumbwidth and $thumbheight are set, and $wcrop and $hcrop
if (function_exists('ImageCreateTrueColor') and $CFG->gdversion >= 2) {
$im1 = ImageCreateTrueColor($thumbwidth,$thumbheight);
} else {
$im1 = ImageCreate($thumbwidth,$thumbheight);
}
$cx = $image->width / 2;
$cy = $image->height / 2;
// These "half" measurements use the "crop" values rather than the actual dimensions
$halfwidth = floor($wcrop * 0.5);
$halfheight = floor($hcrop * 0.5);
ImageCopyBicubic($im1, $im, 0, 0, $cx-$halfwidth, $cy-$halfheight, $thumbwidth, $thumbheight, $halfwidth*2, $halfheight*2);
if (function_exists('ImageJpeg')) {
@touch($thumbnaillocation); // Helps in Safe mode
if (ImageJpeg($im1, $thumbnaillocation, 90)) {
@chmod($thumbnaillocation, 0666);
}
}
} else { // Try and remove the thumbnail - we don't want thumbnailing active
@unlink($thumbnaillocation);
}
}
}
?>