SAOimage display of M-51

SAOimage
Keyboard Input

 SAO/TDC Home Page
Many of the keys on the keyboard are mapped to perform useful functions. Striking the key results in an immediate response. The response may be dependent on the window in which the mouse cursor is positioned. Some responses are also dependent on the main menu mode (i.e. Cursor). Both upper and lower case are mapped the same.

In addition to the instant action keys, the control, shift, and meta (left and right) keys change the response to mouse actions when held down while performing the mouse action.

Sometimes, SAOimage will ask for text or numeric input with a pop-up window. Input in this situation is as one would expect and is unaffected by the mappings which are otherwise in effect. The cursor read-back mode of IRAF, also overrides many keyboard functions.

Mapped Key Commands

Up Arrow, Down Arrow, Left Arrow, Right Arrow
The four arrow keys can be used to move the mouse cursor one screen pixel in the given direction. The mouse interaction is exactly as if you moved the mouse by hand. This facilitates fine positioning and works in all windows and all modes.
A refresh
Raise and redraw the display windows. This is equivalent to ctrl-L in a character terminal window.
B B1950
Track the cursor in B1950 (FK4) coordinates if world coordinate system information is present in the IRAF or FITS image header.
C print coordinates
Prints to standard output the current cursor position in X,Y image pixel coordinates and the value of the closest image pixel. If world coordinate system information is present in the FITS or IRAF image header, right ascension and declination as hh:mm:ss.sss dd:mm:ss.ss or galactic latitude and longitude as dd.ddddd dd.ddddd) are prepended to the output string.
D delete cursor
When in cursor mode, and the mouse is in the display window, the smallest region which encloses the mouse is deleted. In the case of a point region, its area is defined as the area of the first character of its label.
E ecliptic
Track the cursor in ecliptic coordinates if world coordinate system information is present in the IRAF or FITS image header.
G galactic
Track the cursor in galactic coordinates if world coordinate system information is present in the IRAF or FITS image header.
H HMS
Toggle WCS output between degrees and hh:mm:ss.sss dd:mm:ss.ss
J J2000
Track the cursor in J2000 (FK5) coordinates if world coordinate system information is present in the IRAF or FITS image header.
N new
Enter new command-line arguments. This brings up a popup window for text input. Use the same switches and arguments as you would on the command line (see cmdline help). All of the command line arguments which affect selection and display of an image can be used. Some configuration arguments (e.g. -d, -g, & -G) are not affective at this time.
Q quit
Exit from SAOimage. If SAOimage is being used as an IRAF Imtool and an image is being displayed, this key has no effect; exit using the buttons.
R raise
Raise all SAOimage windows to the front of any other windows on the screen. The 'A' key also performs this function.
S save
When in cursor mode, and the mouse is in the display window, the current cursor is saved as a region (of type include).
T table
When the mouse is in the main display window or the pan window, this prints a table of the pixel values surrounding the current mouse position. The table is printed in the terminal window from which SAOimage was called. The values are scaled to their original file values. (L has a seemingly similar affect but is useful only for debugging purposes).
W Preset Unix commands
Execute a command utilizing the world coordinate system. This command may be set by -wcscom command_%s_%x_%f on the command line or by setting the WCS_COMMAND environment variable. The command is executed by the Unix shell, substituting the current world coordinate string for %s, the displayed file for %f, and the current image coordinates for %x. When setting the command on the command line, underscores (_) should be substituted for spaces. The built-in default is sgsc -ah %s See also F1-F9.
X centroid
Print the centroid coordinates of the cursor as image pixel x and y and world coordinate system if present.
+ next
Display next image if current image file is three-dimensional.
- previous
Display previous image if current image file is three-dimensional.
Delete
When in cursor mode, and the mouse is in the display window, the most recently saved region is deleted.
F1-F9 Preset Unix commands
Execute a command utilizing the world coordinate system. This command may be set by -f1 - -f9command_%s_%x_%f on the command line or by setting the WCS_COMMAND1 to WCS_COMMAND9 environment variables. These commands are executed by the Unix shell, substituting the current world coordinate string for %s, the displayed file for %f, and the current image coordinates for %x. When setting the command on the command line, underscores (_) should be substituted for spaces. See also W command. The built-in defaults are
Keyboard Command Environment variable Default system command
F1 WCS_COMMAND1 suac -ah %s
F2 WCS_COMMAND2 sgsc -ah %s
F3 WCS_COMMAND3 stycho -ah %s
F4 WCS_COMMAND4 sppm -ah %s
F5 WCS_COMMAND5 ssao -ah %s

Modifier Keys

For an explanation of mouse clicking and dragging, see the mouse control section.
Shift
Holding the shift key down toggles the 'track' and 'coord' tracking actions.

If no tracking was selected and the mouse is in either the main main display window or the pan window, touching the shift key will update the magnifier window to the current mouse location. If the mouse is in the main display window, the coordinates and pixel value will also appear in the upper right, above the buttons.

If you are in Color mode and dragging the mouse with a button down in either the main or color graph window, the graph will be updated to the current state of the color table.

By contining to hold the shift key down, tracking will continue to update as you move the mouse.

If you were tracking before touching the shift key, pressing the shift key will suspend tracking, enabling you to preserve the existing tracking displays while moving the mouse.

Caps or ShiftLock
Toggling to caps mode by using the Caps or shift lock key has the same effect as holding the shift key down. When using this option, you may need to toggle it off to make normal text entry in the pop-up or a terminal window.
Control
When manipulating the color map in the main diplay window, holding the control key down, restricts the affect to only the color(s) corresponding to the mouse button(s) being pressed (left=red, middle=green, right=blue).
Meta keys
The meta keys have traditionally been used for window manager functioning. SAOimage normally ignores keyboard and mouse input while a meta key is held down.

Pop-up Text and Numeric Input

When SAOimage needs string input such as the name of a file or new command line arguments, it presents a pop-up window for you to type in. The line starts with a default already typed in. Many keyboard editor keys are recognized, including the arrows. The popup window also recognizes many EMACS style line edit commands. The input is taken when the user strikes the return key.
CtrlA: Move text cursor to beginning of line
CtrlB: Move the text cursor back one character (backspace)
CtrlC: Abort the interaction and return to SAOimage
CtrlD: Delete the character under the text cursor
CtrlE: Move the text cursor to the end of the line
CtrlF: Move forward one space
CtrlG: clear escape if just typed
CtrlK: Delete all characters from the text cursor to the end of the line
CtrlN: recall next input line (clear input line if no next in buffer)
CtrlP: recall prior input line
Delete: Delete character before the text cursor
escape B: move to beginning of previous word
escape D: delete to end of next word
escape F: move to end of next word
For numeric input, the typed input must be in acceptable integer or real (where allowed) format. Multiple entries, when desired, must be separated by spaces, commas, or tabs. (The line is read using scanf).

Last updated 19 May 1999 by Doug Mink dmink@cfa.harvard.edu

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