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Prima::ImageDialog

Prima::ImageDialog

Section: User Contributed Perl Documentation (3) Updated: 2009-02-24
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NAME

Prima::ImageDialog - file open and save dialogs.  

DESCRIPTION

The module provides dialogs specially adjusted for image loading and saving.  

Prima::ImageOpenDialog

Provides a preview feature, allowing the user to view the image file before loading, and the selection of a frame index for the multi-framed image files. Instead of "execute" call, the load method is used to invoke the dialog and returns the loaded image as a "Prima::Image" object. The loaded object by default contains "{extras}" hash variable set, which contains extra information returned by the loader. See Prima::image-load for more information.  

SYNOPSIS

        my $dlg = Prima::ImageOpenDialog-> create;
        my $img = $dlg-> load;
        return unless $img;
        print "$_:$img->{extras}->{$_}\n" for sort keys %{$img-> {extras}};

 

Proprties

preview BOOLEAN
Selects if the preview functionality is active. The user can switch it on and off interactively.

Default value: 1

 

Methods

load %PROFILE
Executes the dialog, and, if successful, loads the image file and frame selected by the user. Returns the loaded image as a "Prima::Image" object. PROFILE is a hash, passed to "Prima::Image::load" method. In particular, it can be used to disable the default loading of extra information in "{extras}" variable, or to specify a non-default loading option. For example, "{extras}->{className} = 'Prima::Icon'" would return the loaded image as an icon object. See Prima::image-load for more.

"load" can report progressive image loading to the caller, and/or to an instance of "Prima::ImageViewer", if desired. If either (or both) "onHeaderReady" and "onDataReady" notifications are specified, these are called from the respective event handlers of the image being loaded ( see ``Loading with progress indicator'' in Prima::image-load for details). If profile key "progressViewer" is supplied, its value is treated as a "Prima::ImageViewer" instance, and it is used to display image loading progress. See ``watch_load_progress'' in Prima::ImageViewer.

 

Events

HeaderReady IMAGE
See ``HeaderReady'' in Prima::Image.
DataReady IMAGE, X, Y, WIDTH, HEIGHT
See ``DataReady'' in Prima::Image.
 

Prima::ImageSaveDialog

Provides a save dialog where the user can select image format, the bit depth and other format-specific options. The format-specific options can be set if a dialog for the file format is provided. The standard toolkit dialogs reside under in "Prima::Image" namespace, in Prima/Image subdirectory. For example, "Prima::Image::gif" provides the selection of transparency color, and "Prima::Image::jpeg" the image quality control. If the image passed to the image property contains "{extras}" variable, the data are read and used as the default values. In particular, "{extras}->-{codecID}" field, responsible for the file format, if present, affects the default file format selection.  

SYNOPSIS

        my $dlg = Prima::ImageSaveDialog-> create;
        return unless $dlg-> save( $image );
        print "saved as ", $dlg-> fileName, "\n";

 

Properties

image IMAGE
Selects the image to be saved. This property is to be used for the standard invocation of dialog, via "execute". It is not needed when the execution and saving is invoked via save method.
 

Methods

save IMAGE, %PROFILE
Invokes the dialog, and, if the execution was successful, saves the IMAGE according to the user selection and PROFILE hash. PROFILE is not used for the default options, but is passed directly to "Prima::Image::save" call, possibly overriding selection of the user. Returns 1 in case of success, 0 in case of error. If the error occurs, the user is notified before the method returns.
 

AUTHOR

Dmitry Karasik, <dmitry@karasik.eu.org>.  

SEE ALSO

Prima, Prima::Window, Prima::codecs, Prima::image-load, Prima::Image, Prima::FileDialog, Prima::ImageViewer, examples/iv.pl.


 

Index

NAME
DESCRIPTION
Prima::ImageOpenDialog
SYNOPSIS
Proprties
Methods
Events
Prima::ImageSaveDialog
SYNOPSIS
Properties
Methods
AUTHOR
SEE ALSO

This document was created by man2html, using the manual pages.
Time: 21:53:00 GMT, April 16, 2011