Ubuntu Manpage: winop - Perform assorted window and image operations

Provided by: blt-dev_2.5.3+dfsg-4.1build2_amd64

NAME

       winop - Perform assorted window and image operations

SYNOPSIS

       winop changes window

       winop gradients leftcolor rightcolor gradients

       winop image subcommand ...

              winop image alpha srcImage destImage color

              winop image colors ?-alpha? srcImage

              winop image convolve srcImage destImage filter

              winop image gradient image leftcolor rightcolor ...

              winop image merge srcImage1 srcImage2 destImage ?alpha? ?...?

              winop image mirror srcImage1 destImage ?x|y|xy|tile|outer|inner?

              winop image quantize srcImage destImage ?nColors?

              winop image readjpeg filename photoname

              winop image resample srcImage destImage ?horizFilter? ?vertFilter?

              winop image rotate srcImage destImage angle

              winop   image   subsample   srcImage  destImage  x  y  width  height  ?horizFilter?
              ?vertFilter?

       winop lower ?window?...

       winop map ?window?...

       winop move window x y

       winop query

       winop raise ?window?...

       winop snap window photoName ?width height ?

       winop unmap ?window?...

       winop warpto ?window?
_________________________________________________________________

DESCRIPTION

       The winop command performs various window and image operations on Tk  windows  using  low-
       level Xlib function calls to work around window manager pecularities.

INTRODUCTION

       Tk  has  several  commands  for  manipulating  its  windows: raise, lower, wm, etc.  These
       commands ask the window manager to perform operations on Tk windows.   In  some  cases,  a
       particular window manager won't perform the operation as expected.

       For  example,  if  you  positioned a toplevel window using wm geometry, the window may not
       actually be at those particular coordinates.  The position of the window may be offset  by
       dimensions of the title bar added by the window manager.

       In  situations like these, the winop command can be used to workaround these difficulties.
       Instead, it makes low-level Xlib (such XRaiseWindow and XMapWindow) calls to perform these
       operations.

              toplevel .top
              wm withdraw .top

              # Set the geometry to make the window manager
              # place the window.
              wm geometry .top +100+100

              # Move the window to the desired location
              # and "update" to force the window manager
              # to recognize it.
              winop move .top 100 100
              update

              wm deiconify .top
              winop move .top 100 100

OPERATIONS

The following operations are available for the winop command:

winop changes window
Realize window.

winop image subcommand ...
Image sub-commands.

winop image alpha ?-shift? srcImage destImage color ?alpha? ?withalpha?
Set image pixels of the given color to transparent. If an alpha value is
not given, it defaults to 0 (meaning transparent). An alpha of 255 is used
for solid. The srcImage and destImage may be the same. If the color is *
any color is matched. If color is prefixed with ! match is inverted.

winop gradients leftcolor rightcolor width
Return a list of width colors that graduate from leftcolor to the color just
before rightcolor. Note that the last color in the returned list is not
rightcolor. A typical use for this is calculating shadow colors.

winop image blur srcImage dstImage ?radius?
Blur an image using gaussian blur.

winop image colors ?-alpha? ?-count? srcImage
Return list of distinct colors. If -alpha is given, the alpha is appended
to each color after a colon, eg #FF0000:00. If -count is given, returns
color/count pairs.

winop image convolve srcImage destImage filter
Convolve an image: filter is a list of numbers. The srcImage and destImage
may be the same.

winop image gradient image leftcolor rightcolor ...
Generate a gradient from left to right into image. The following options
are available:

-skew N
The skew determines the initial fraction of the image that the gradient
occupies, after which only rightcolor is used. The skew must be > 0
and <= 1.0. The default value is 1.0, meaning not skewed.

-slant N
Make the gradient slant where a value of 1.0 slants at 45 degrees. The
value must be between -100.0 and 100.0.

-mathval N
Curve the gradient by passing the Y position to the function -mathfunc.
The value must be between -100.0 and 100.0 (typically 1.0). The
default is 0.0, which means disabled.

-mathfunc X
Function to use with -mathval. The default value is sin. The value
must be one of: sin cos tan sinh cosh tanh asin acos atan log log10 exp
sqrt rand circle.

-rand N
Add small random purturbations to gradient to avoid striation lines.
The value must be between 0.0 and 0.1.

-height N
Change the image height.

-width N
Change the image width.

winop image merge srcImage1 srcImage2 destImage ?opacity? ?opacity2?
Merge two images with alpha blending. The default ?opacity? is 0.5, and the
default for ?opacity2? is 1.0 - ?opacity?.

winop image mirror srcImage1 destImage ?x|y|xy|tile|outer|inner? ?halo?
Flips an image on axis x, y or xy. The tile option results in a double size
image with mirror copies appended to generate a tile-able image. The outer
option is used to resize an image while preserving the outside border by
halo pixels (default is 16). The inner option copies from the center of
source keeping it centered. These last 2 are used implicitly by
blt::tile::button -bdtile, etc. The srcImage1 and destImage must not be the
same if using tile, inner or outer. The default is xy.

winop image quantize srcImage destImage ?nColors?
Limit number of colors in image. Default 1. The srcImage and destImage may
be the same.

winop image readjpeg filename photoname
Read a jpeg image using libjpeg. IMG makes this obsolete (and thus probably
not builtin).

winop image recolor srcImage destImage oldColor newColor ?alpha?
Change pixels from oldColor to newColor. If ?alpha? is not given it
defaults to 255 (opaque). The srcImage and destImage may be the same.

winop image resample srcImage destImage ?horizFilter? ?vertFilter?
Resample an image. If srcImage and destImage are the same size, just makes
a copy. Otherwise the image is resized to the size of destImage, possibly
wih filtering. Filters are one of: bell bessel box bspline catrom default
dummy gauss8 gaussian gi lanczos3 mitchell none sinc triangle. The
destImage must be greater than 1x1.

winop image rotate srcImage destImage angle
Rotate an image. The srcImage and destImage may be the same.

winop image subsample srcImage destImage x y width height ?horizFilter?
?vertFilter?
Resample area of an image. See resample.

winop image trans image x y ?alpha?
Get or set the integer alpha value within an image.

winop lower ?window?...
Lowers window to the bottom of the X window stack. Window is the path name of a Tk
window.

winop map ?window?...
Maps window on the screen. Window is the path name of a Tk window. If window is
already mapped, this command has no effect.

winop move window x y
Move window to the screen location specified by x and y. Window is the path name of
a Tk window, while x and y are screen coordinates. This command returns the empty
string.

winop query
Query pointer position. Returns @X,Y.

winop raise ?window?...
Raises window to the top of the X window stack. Window must be a valid path name of
a Tk window. This command returns the empty string.

winop snap window photoName ?width height?
Takes a snapshot of the window and stores the contents in the photo image
photoName. Window is the valid path name of a Tk window which must be totally
visible (unobscured). PhotoName is the name of a Tk photo image which must already
exist. This command can fail if the window is obscured in any fashion, such as
covered by another window or partially offscreen. In that case, an error message
is returned. If width or height is given, the image is resampled to the given
size.

winop unmap ?window?...
Unmaps window from the screen. Window is the path name of a Tk window.

winop warpto ?window?
Warps the pointer to window. Window is the path name of a Tk window which must be
mapped. If window is in the form @x,y, where x and y are root screen coordinates,
the pointer is warped to that location on the screen.

[I've never heard a good case for warping the pointer in an application. It can be
useful for testing, but in applications, it's always a bad idea. Simply stated,
the user owns the pointer, not the application. If you have an application that
needs it, I'd like to hear about it.]

If no window argument is present the current location of the pointer is returned.
The location is returned as a list in the form "x y", where x and y are the current
coordinates of the pointer.

KEYWORDS

       window, map, raise, lower, pointer, warp