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pkgIndex.tcl
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package ifneeded aloupe 0.8 [list source [file join $dir aloupe.tcl]]
# A short intro (for Ruff! docs generator:)
namespace eval aloupe {
set _ruff_preamble {
The *aloupe* is a Tcl/Tk small widget / utility allowing to view the screen through a loupe.
It allows also
* to make screenshots of magnified images
* to pick a color from the images.
It is inspired by the Tcl/Tk wiki pages:
[A little magnifying glass](https://wiki.tcl-lang.org/page/A+little+magnifying+glass)
[A Screenshot Widget implemented with TclOO](https://wiki.tcl-lang.org/page/A+Screenshot+Widget+implemented+with+TclOO)
It looks like this:
<img src="https://aplsimple.github.io/en/tcl/aloupe/files/aloupe.png" class="media" alt="">
## Usage
The *aloupe* utility runs with the command:
tclsh aloupe.tcl ?option value ...?
where `option` may be `-size, -zoom, -alpha, -background, -geometry, -ontop`.
The `Img` and `treectrl` packages have to be installed to run it. In Debian Linux the packages are titled `libtk-img` and `tktreectrl`.
There are also stand-alone [aloupe executables](https://github.com/aplsimple/aloupe/releases) for Linux / Windows.
The executables are started as simply as:
aloupe
aloupe.exe
After the start, two windows would be displayed: a moveable loupe (at the mouse pointer) and a displaying window.
The loupe is moved by drag-and-drop. At dropping the loupe, its underlying image is magnified in the displaying window.
To change a size/zoom of the loupe, use the appropriate spinboxes. After changing them, just click the loupe to update the windows.
To save the magnified image, use *Save* button.
The *To clipboard* button displays a current pixel's color at clicking the image. When hit, the button puts the color into the clipboard.
The `-command` option may be passed to `::aloupe::run` which will run the passed command at pressing the *To clipboard* button. The command may contain `%c` wildcard meaning the color value. Just to test, try and set `-command "puts %c"` option.
## Options
The *aloupe* can be run with the options:
* `-size` - a size of the loupe's box (8 .. 256)
* `-zoom` - a zoom factor (2 .. 32)
* `-alpha` - an opacity of the loupe (0.0 .. 1.0)
* `-background` - a background color of the loupe
* `-geometry` - a displaying window's geometry set as +X+Y
* `-ontop` - if *yes*, sets the displaying window above others
Some options can be used at running *aloupe* from a Tcl code:
* `-exit` - is *false* which means "don't finish Tcl/Tk session, just close the loupe"
* `-command` - a command to be run at pressing the *To clipboard* button
* `-parent` - a parent window's path (when the parent closes, its *aloupe* children do too)
From a Tcl code, *aloupe* is run this way:
package require aloupe
::aloupe::run ?option value ...?
## Links
* [Reference](https://aplsimple.github.io/en/tcl/aloupe/aloupe.html)
* [Source](https://chiselapp.com/user/aplsimple/repository/aloupe/download) (aloupe.zip)
* [Demo and executables](https://github.com/aplsimple/aloupe/releases) for Linux / Windows
## License
MIT.
}
}
namespace eval ::aloupe::my {
set _ruff_preamble {
The `::aloupe::my` namespace contains procedures for the "internal" usage by *aloupe* package.
All of them are upper-cased, in contrast with the UI procedures of `aloupe` namespace.
}
}