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List:       koffice-devel
Subject:    Re: KFontDialog has new option for usage of relative font sizes
From:       Karl-Heinz Zimmer <khz () kde ! org>
Date:       2001-12-16 1:24:40
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Hi,

a little change had to be done in this feature: now the "sizeIsRelative"
parameter is a *QButton::ToggleState, before it was a *bool.

This change was neccessary to enable us to use the new "diff" feature of
KFontDialog in an intuitive way.

To make use of this functionallity, please make sure that (whenever you
use the "diff" feature to modify _multiple_ fonts) you set the
sizeIsRelative parameter to "QButton::NoChange" _if_ these multiple fonts
do not share the same "sizeIsRelative" settings.

e.g. When offering the user a way to change the fonts off all axes that
     are used for drawing her/his chart, first look at all the axes and
     make sure that (either) all of them have relative font sizes
     (or) all of them have fixed font sizes - otherwise set the flag
     to "QButton::NoChange".
     After the user has closed the KFontDialog (in "diff" mode) you should
     look whether the "sizeIsRelative" flag is set to QButton::On /::Off
     or it is set to QButton::NoChange, if the later just do _not_ change
     the "relative" flag settings of the respective fonts.

Cheers,

Karl-Heinz

On Saturday 15 December 2001 01:46, Karl-Heinz Zimmer wrote:
> [Hi Daniel, I am cc'ing you because I think you should know about
>  this feature, it might be relevant for documentation of KFontDialog...]
>
>
> Hi,
>
> KDE head branch got a little addition in kdelibs/kdeui/kfontdialog.h .cpp
> that might be of some use for KOffice, actually we are using it in kchart.
>
> Specifying an additional *bool parameter when calling KFontDialog::getFont
> (or the c'tor, or KFontDialog::getFontAndText) you get a little checkbox
> saying "relative" immediately below the "Size" listbox.
>
> Checking this box would result in KFontDialog::getFont returning 'true'
> in the new *bool parameter.
> The state of the box may also be retrieved by calling
> KFontChooser::sizeIsRelative() - this is only for rare cases where you
> might prefer using the KFontChooser class rather than the KFontDialog.
>
> Ok, what is this "relative" checkbox good for?
>
> When using fonts you often have the problem that the font size must be
> adjusted each time when the size of the paper or the wigdet size was
> changed.
> One common solution of course is using stylesheets (so the user has to
> adjust his base stylesheet only) but this is only one way how to do it,
> another solution is: just specify that your font size is _not_ x Points
> but x per mille of the widget size (or something similiar).
> By doing so your layout will become more independend from changing
> widget size - something that might happen easily to a KParts object.
>
> So (to come to an end of my speach :)) this is my proposal: look through
> your code and look for possibilities to enhance the usability by giving
> the user the option to choose relative sizes rather than fixed ones. Of
> course this not only belongs to font sizes but to many other things as
> well: line widths, diameter of little marker symbols, relative distance
> of floating frames from the paper border . . .
>
> I am sure it is easier to think about this now, since KOffice today is a
> great and large project but not a 'huge' project - and I am sure the same
> task will take far more time when being performed in one or two years.
> I see KOffice on a completely different level then and it probably will
> be far more complicated to make such changes then, so that's why I am
> making the proposal to think about this option today. :))
>
> Cheers,
>
> Karl-Heinz
-- 
Karl-Heinz Zimmer, Senior Software Engineer, Klarälvdalens Datakonsult AB
<mailto:khz@klaralvdalens-datakonsult.se>            <mailto:khz@kde.org>

   BugCops  ***  Making Free Software Better  ***  http://bugcops.org

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