id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc	mlocked
602	Add ability to see recording changes resulting from a schedule change	mythtv@…	bjm	"When configuring a scheduled recording, I often think ""If I save now, how will my scheduled recording change?"".  This patch adds the ability to answer that question.

From the UI standpoint, it creates a new option in the menu ""Display recording changes"".  Selecting this pulls up a new display (after about a second delay on my machine) that lists all the scheduled recordings that have changed, what the old status was, and what the new status will be.  For example:
....The Secret Life Of ... - ""Christmas""  C  1
says that that particular show used to be a confilcting recording, but will now be recorded.  This allows you to instantly see what will change if you save your current options when adding a new recording or editting an old one.

Programmatically, there are many more changes.  A new object is added, called ViewScheduleDiff to hold the UI of this screen.  A new table is added, record_tmp, that stores the proposed changes.  To prevent race conditions, a MySQL lock is obtained before using that table.  QUERY_GETALLPENDING gets an optional argument - the table from which to pull the ""record"" data.  Configurable gets a new virtual function save(QString destination) (necessary to save the displayed options to record_tmp).  The last change touches a lot of files without making substantative changes in them.

Potential drawbacks:
* The screen is somewhat slow to display on my machine due to the scheduling calculations, and it may take much longer on slower processors to compute what the new schedule would be.
 * The recording options edit page now scrolls one line.

Advantages:
 * Can visually see the results of edits in recording options, without the need to remember the entire schedule.

Potential extensions:
 * Ability to see the results of priority changes, overrides, ""never record"", or other changes."	enhancement	closed	minor	0.19	mythtv		low	fixed			0