Screenshots Plugin

Description

Provides screenshots upload and viewing subsystem for Trac. Uploaded screenshots can be described with short name, longer description and custom tags (if TracTags plugin is installed) and assigned to any number of components and versions registered in Trac. Screenshot uploads can be listed in timeline and screenshots can be referenced or embedded in wiki pages. Plugin internally defines few interfaces for further extension.

The name is a little misleading as of course it is perfectly able to be used as a picture archive for the wiki pages.

Bugs/Feature Requests

Existing bugs and feature requests for ScreenshotsPlugin are here.

If you have any issues, create a new ticket but read BugReporting page first, please.

Download and Source

Download the zipped source, check out using Subversion, or browse the source with Trac.

Dependencies

You need to have PIL library installed to get plugin working. Plugin optionally depends on TracTags plugin for screenshot tagging support.

Installation

Install plugins egg and set variables in the [screenshots] section of your trac.ini configuration file according to your needs. Following list shows all of them with a description and their default values:

Option	Description	Default Value
default_components	default values for component filter	none
default_description	description attached to the screenshot if not explicitly specified in request	$description
default_filter_relation	how the filters should be related by default	or
default_format	format which will be returned if no format is specified in request (see formats below)	html
default_list_item	how the [[ScreenshotsList]] macro should be expanded by default	$id - $name - $description
default_order_directions	whether to start with the first or last item by default	asc
default_orders	if not specified otherwise, by which criteria should we order?	id
default_versions	default values for version filter	none
ext	list of allowed file extension which can be uploaded	jpg,png
formats	in which formats images can be downloaded	raw,html,jpg,png
mainnav_title	Caption in Tracs main navigation menu (empty = hide item)	Screenshots
metanav_title	Caption in Tracs meta navigation menu (empty = hide item)
path	location of directory where plugin should store uploaded and generated images	/var/lib/trac/screenshots

default_format and formats must be supported by your PIL library installation. There are two meta formats: raw denotes original format of uploaded image and html is image embedded in HTML page. ext can also include the zip extension, which is not included by default for security reasons. If a zip file containing multiple images is uploaded, all of the images applying to the other extensions specified by ext will be added with the same metadata entered for the zip file - and the zip file itself will be abandoned.

default_components and default_versions options sets default values for component and version filter. Set these variables according your Trac setup, otherwise, you wouldn't see any screenshots with default filter.

If you run Trac in environment which needs to enable plugins explicitly put in trac.ini these lines:

[components]
TracScreenshots.init.ScreenshotsInit = enabled
TracScreenshots.core.ScreenshotsCore = enabled
TracScreenshots.api.ScreenshotsApi = enabled
TracScreenshots.matrix_view.ScreenshotsMatrixView = enabled
TracScreenshots.tags.ScreenshotsMatrixView = enabled
TracScreenshots.wiki.ScreenshotsWiki = enabled
TracScreenshots.timeline.ScreenshotsTimeline = enabled # For 0.11 branch.
TracScreenshots.tags.ScreenshotsTags = enabled

ScreenshotMatrixView is currently the only one present component for actual screenshots display although there are internaly defined interfaces so any other component with different view can be introduced in the future.

If you don't have TagsPlugin installed replace last line with

tracscreenshots.tags.screenshotstags = disabled

Create directory you have specified with path config option and make sure it is accessible by Trac server. The next step is to upgrade your environment:

# trac-admin <path_to_environment> upgrade

Permissions

Screenshots plugin defines four permissions - each one in this list depends on the one mentioned before it, and adds its permissions upon that (with SCREENSHOTS_FILTER and SCREENSHOTS_ORDER being on the same level):

SCREENSHOTS_VIEW	permits to browse screenshots and see screenshot uploads in timeline
SCREENSHOTS_FILTER	allows to modify component and version filter
SCREENSHOTS_ORDER	permits to change the order they are displayed in
SCREENSHOTS_ADMIN	permission to upload/delete screenshots

If you use apache, please restart it, before setting permissions. You can add these permissions by typing following commands from commandline or you can use WebAdminPlugin to do it for you:

# trac-admin <path_to_environment> permission add <user> SCREENSHOTS_VIEW
# trac-admin <path_to_environment> permission add <user> SCREENSHOTS_FILTER
# trac-admin <path_to_environment> permission add <user> SCREENSHOTS_ORDER
# trac-admin <path_to_environment> permission add <user> SCREENSHOTS_ADMIN

Macros

There is a macro [screenshot:<screenshot_id>] for screenshots referencing.

For screenshot embedding in wiki page use [[Screenshot(<screenshot_id>, [<attribute>=<value>, ...])]]. First mandatory argument is ID of the screenshot. Number or image attributes can be specified next. This is a list of them:

• align - Specifies image alignment in wiki page. Possible values are: left, right and center.
• alt - Alternative description of image.
• border - Sets image border of specified width in pixels.
• class - Class of image for CSS styling.
• description - Brief description under the image. Accepts several variables (see bellow).
• format - Format of returned image or screenshot behind link.
• height - Height of image. Set to 0 if you want original image height.
• id - ID of image for CSS styling.
• longdesc - Detailed description of image.
• title - Title of image.
• usemap - Image map for clickable images.
• width - Width of image. Set to 0 if you want original image width.

Attribute description displays several variables:

• $id - ID of image.
• $name - Name of image.
• $author - User name who uploaded image.
• $time - Time when image was uploaded.
• $file - File name of image.
• $description - Detailed description of image.
• $width - Original width of image.
• $height - Original height of image.
• $tags - Comma separated list of screenshot tags.
• $components - Comma separated list of screenshot components.
• $versions - Comma separated list of screenshot versions.

Example:

 [[Screenshot(2,width=400,height=300,description=The $name by $author: $description,align=left)]]

For creating image maps you might consider using tools like http://www.maschek.hu/imagemap/imgmap.

[[ScreenshotsList()]] macro displays list of all available screenshots on wiki page. Accepts one argument which is template for list items formatting. Possible variables in this template are:

• $id - ID of image.
• $name - Name of image.
• $author - User name who uploaded image.
• $time - Time when image was uploaded.
• $file - File name of image.
• $description - Detailed description of image.
• $width - Original width of image.
• $height - Original height of image.
• $tags - Comma separated list of screenshot tags.
• $components - Comma separated list of screenshot components.
• $versions - Comma separated list of screenshot versions.

Example:

 [[ScreenshotsList($name - $description ($widthx$height))]]

Notes

Previous revisions used space separated list of values in trac.ini configuration options. Now it uses comma separated list so change this to prevent inconveniences.

Feedback

Are you using this plugin?

• Yes, it's usefull. (sgrayban, cboos, okaori, wadeb, s0undt3ch, ttressieres, imme, dh1jc, talameelombu, Tharban, athomas, jtuchscherer, xvirus, osimons, prz, Sincklation, manni, izzy, ericalens, KevinGabbert, mwehr, renzo)
• No, it's useless.
• No, I don't need it. (dfaerch)

Change Log

[4673] by Blackhex on 10/30/08 09:36:06

ScreenshotsPlugin:

• Fixed uploaded file name problem on Windows.

[4365] by Blackhex on 10/01/08 12:08:37

ScreenshotsPlugin:

• Fixed missing exclamation mark in configuration option documentation.

[4364] by Blackhex on 10/01/08 06:42:41

ScreenshotsPlugin:

• Zip archive upload support.
• Fixed bug that first screenshot was not displayed.

[4359] by Blackhex on 09/30/08 03:44:37

ScreenshotsPlugin:

• [[Screenshot()]] macro now keeps aspect when one dimension is not specified.
• Display of matrix view screenshots with preserved aspect via CSS.

[4355] by Blackhex on 09/27/08 17:21:00

ScreenshotsPlugin:

• Links to first page, last page and go to page form added to matrix view (#3780).

[4344] by Blackhex on 09/26/08 06:53:22

ScreenshotsPlugin:

• DB schema updated with priority field. Backup your DB before upgrading!!!
• Screnshots order facility introduced (default_orders and default_order_directions configuration options added. SCREENSHOTS_ORDER permission added.).
• Screenshot images can be now replaced via edit form.
• AND/OR relation between component and version filters added.
• Fixed UnicodeDecodeError? when system error messages has international characters.
• Fixed missing components, versions and description in HTML view.
• Behavior of align attribute of [[Screnshot()]] macro changed for ticket #3771.

Author/Contributors

Author: Blackhex
Contributors: