Table of open images
Sections in this page
This window, only one of which may be displayed, contains a table of all the image windows currently open in GRIP. Any number of rows of the table may be selected by clicking on them (using the usual conventions for Shift and Ctrl keys etc). Above the table is a menu which enables operations to be performed on the selected images. This is particularly useful for combining images: adding, averaging, multiplying or subtracting them, and various other interesting operations.
The following menus and options are available in this window.
The file menu
- asks for the name of a file with the extension .csv and saves the table data in it in Comma-Separated Value format. This is a text format which can be opened by spreadsheets (Microsoft Excel, Sun StarOffice, etc).
- asks for the name of a file with the extension .xml and saves the table data in it in eXtensible Mark-up Language (XML). This is suitable for further automated processing.
- is only available if just one image is selected in the table. It brings the window for that image to the front, so it can be seen without other windows overlapping it.
- is only available if at least one row of the table has been selected. It does what it says and the table is then redrawn.
- brings the main GRIP window to the front, so it is visible (this does work in Windows but the Java API documentation says this will not necessarily work on all platforms). It is worth remembering that the short-cut key combination (Ctrl+G in Windows) will work from anywhere in the application, so you can always find GRIP's small main window.
The editing menu
- selects all rows in the table.
- is only available if at least one row of the table has been selected. All rows are then deselected.
- redraws the table. Mostly the table is refreshed automatically when events such as image windows opening or closing occur in GRIP.
The combination menu
This menu enables a number of images to be combined in various ways. It is described on a separate page.
The help menu
This menu uses the new desktop facilities of Java 6, in the package java.awt.desktop. Selecting any option except the last one (About GRIP) launches your system's default browser in order to display help from HTML files. This mechanism does not work in Java versions earlier than 6.
- displays the Contents page.
- displays the Index page.
- displays programming information in Sun's standard javadoc format. Java programmers can use this to modify and extend GRIP.
- displays a message window which shows not only the version identifier for this copy of GRIP but also some useful information about the Java Virtual Machine (JVM) in which it is running. The information includes how much memory is currently being used and how much remains available for GRIP to use. It can be interesting to look at this at various stages when opening, closing and processing images. As discussed elsewhere, an image is a large amount of data so it is quite possible to run out of memory when several are opened.