Review Request: Add support for AlphaChannel to KColorDialog

[Christoph Feck]

-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
http://reviewboard.kde.org/r/3566/
-----------------------------------------------------------

Review request for Gwenview, kdelibs and usability.


Summary
-------

Add an "alphaChannelEnabled" property to KColorDialog to support QColorDialog::ShowAlphaChannel.
Requires the patch from http://reviewboard.kde.org/r/3565 to show the alpha gradient.

Please comment on:
* name/description of newly added methods in KColorDialog
* visible "Alpha" label ("Opacity"?)
* placement of widgets (yes, Alpha label should be aligned to RGB labels, but how?)


Diffs
-----

  /trunk/KDE/kdebase/workspace/qguiplatformplugin_kde/qguiplatformplugin_kde.cpp 1113711 
  /trunk/KDE/kdelibs/kdeui/colors/kcolordialog.h 1113786 
  /trunk/KDE/kdelibs/kdeui/colors/kcolordialog.cpp 1113786 

Diff: http://reviewboard.kde.org/r/3566/diff


Testing
-------

I used this to test integration with QColorDialog:

#include <QtGui/QApplication>
#include <QtGui/QColorDialog>
#include <QtCore/QDebug>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QColor color = QColorDialog::getColor(QColor(255, 0, 0, 100), 0, "Select ARGB Color",
                                          QColorDialog::ShowAlphaChannel);
    qDebug() << color;
}


Screenshots
-----------

KColorDialog with enabled AlphaChannel
  http://reviewboard.kde.org/r/3566/s/354/


Thanks,

Christoph