Hi,
On 20 Mar 2007, at 11:51, Bryan McCormick wrote:
Dave,
Oddly the code only worked when I removed the "of window
myWindowID" reference. Then it was fine. Otherwise I got the same
error that you did. I am not sure if this is a bug or if export
won't take a window id param for some reason.
I was just going by the documentation (copied below). Interestingly
syntax line(at the top) has changed since Version 2.6.6.152, but it's
still mentioned later on:
If you specify a windowID, the rectangle's coordinates are relative
to the top left corner of the window you specify. However, if the
window is partly overlapped by another window, whatever is visible on
the screen within that rectangle is placed in the snapshot. In other
words, you cannot take a snapshot of a part of a window that is
hidden by another overlapping window.
This now begs another question, if it doesn't work with a Window ID
now, how can I get the coordinates of an object I want to export.
Also does it still grab a part of the screen? IOW, if the user covers
this window with another window will it still output the window
contents or will it output whatever happens to be at the location
specified?
All the Best
Dave
export snapshot
Type: command
Syntax:
export snapshot [from rect[angle] rectangle] [of object] to {file
filePath |container} [as format] [with mask maskFile]
See Also: export command, import snapshot command, rectangle
property, screenRect function, windowID property
Introduced: 2.1
Changed: 2.1
Platform Support:
Summary:
Creates a picture file from a portion of the screen.
Examples:
export snapshot to file "Test.ppm"
export snapshot from rect "0,0,200,200" to file "Nav.jpg" as JPEG
export snapshot to pictVariable as GIF
Use the export snapshot command to export a screenshot to a file or
container.
Parameters:
The rectangle specifies the edges of the rectangle to be imported,
separated by commas, in the same order as the rectangle property
(left, top, right, bottom).
Important! If a window, stack or object is specified, the
rectangle is given in relative (window) coordinates; otherwise, it is
given in absolute coordinates.
The filePath specifies the name and location of the file you want to
export to. If you specify a name but not a location, the file is
created in the defaultFolder.
The container is a reference to a container, usually an image or a URL.
The format is one of the following: paint, JPEG, GIF, or PNG.
The maskFile specifies the name and location of a file to export as
an image mask. You can use a maskFile only when exporting in PBM
format (paint).
To export a snapshot for a portion of a stack you use the form:
export snapshot from rect[angle] of window windowId to ...
Where windowId is the windowId property of the required stack.
To export a snapshot of a specific (non-stack) object, use the form:
export snapshot from [rect[angle] ] of chunk to ...
Where chunk is any chunk expression resolving to a control, or any
expression evaluating to a control reference.
Comments:
If you use the form export format to..., the selected image is exported.
The export snapshot...as paint form exports the image as a PBM, PGM,
or PPM file, depending on the screen depth. (Optionally, you can
specify a location for the mask file.) The export snapshot...as JPEG
form exports as a JPEG file, and the export snapshot...as PNG form
exports as a PNG file. If you don't specify a format, the file is
exported as PBM, PGM, or PPM.
Tip: If the image has an alpha channel, the export snapshot...as
PNG form creates a 32-bit PNG file.
If taking a snapshot of an object, the rectangle's coordinates are
relative to the top left corner of the card containing the object.
The object is rendered into an image as if no other objects existed
around it, the snapshot is taken without applying the object's
blendlevel or ink. You can take a snapshot of an object regardless of
its visibility or open status - in particular, snapshots can be taken
of objects that are not on the current card or in stacks that are not
open.
If you don't specify a rectangle, Revolution displays a crosshairs
cursor. Click at one corner of the rectangle to be imported and drag
to the opposite corner to select the area.
If you specify a windowID, the rectangle's coordinates are relative
to the top left corner of the window you specify. However, if the
window is partly overlapped by another window, whatever is visible on
the screen within that rectangle is placed in the snapshot. In other
words, you cannot take a snapshot of a part of a window that is
hidden by another overlapping window.
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