Commit Graph

10 Commits

Author SHA1 Message Date
Emmanuele Bassi
d1f3190f5b [units] Add more conversion functions
A GValue containing a ClutterUnit should be transformable into a
GValue holding an integer, a floating point value or a fixed point
value.

This means adding more transformation functions when registering
the ClutterUnit GType.
2009-03-10 12:38:04 +00:00
Emmanuele Bassi
6ca40faaec [units] Fix Units in GValue and ClutterParamSpecUnit
The GValue and GParamSpec integration of ClutterUnit was still
using the old, fixed-point based logic.

Storing ClutterUnits in a GValue should use floating point values,
and ClutterParamSpecUnit should follow suit.
2009-01-22 12:11:25 +00:00
Emmanuele Bassi
355555c1bf Store the units-per-em inside the Backend
Instead of recomputing the number of units needed to fit in
an em each time clutter_units_em() is called, we can store this
value into the default Backend along with the resolution and
font name. The value should also be updated each time the
resolution and font are changed, to keep it up to date.
2009-01-22 11:42:11 +00:00
Emmanuele Bassi
ee883f30d4 Add units-from-em conversion
An em is a unit of measurement in typography, equal to the point
size of the current font.

It should be possible to convert a value expressed in em to
ClutterUnits by using the current font and the current DPI as
stored by the default backend.
2009-01-21 17:35:47 +00:00
Emmanuele Bassi
93a0454c09 Remove the single-stage units converters
The stage-with/height-percentage converters had been broken by
the multiple-stages support of Clutter 0.8. They are also made
useless by the fact that Units are now floating point values.

The millimeters and typographic points converters also depended
on the default stage, but they can be reworked to use the default
DPI coming from the default Backend instead.
2009-01-21 17:10:36 +00:00
Emmanuele Bassi
1abccbad21 2008-05-09 Emmanuele Bassi <ebassi@openedhand.com>
Bug #902 - Support transform from G_TYPE_INT to ClutterUnit

	* clutter/clutter-units.c:
	(clutter_value_transform_int_unit),
	(clutter_unit_get_type): Add GValue transformation function from
	integer values to ClutterUnit. (#902)

	(param_unit_validate): Fix validation for ClutterParamSpecUnit;
	this allows writable ClutterUnit properties.

	* clutter/clutter-fixed.c:
	(clutter_value_transform_int_fixed),
	(clutter_value_transform_double_fixed),
	(clutter_value_transform_float_fixed): Add GValue transformation
	functions from native types (int, double, float) to ClutterFixed.

	(clutter_fixed_get_type): Register the new transformation functions.

	(param_fixed_validate): Fix validation for ClutterParamSpecUnit;
	this allows writable ClutterFixed properties.
2008-05-09 10:58:26 +00:00
Emmanuele Bassi
a7f4767ecb 2008-04-28 Emmanuele Bassi <ebassi@openedhand.com>
* clutter/clutter-units.c (param_unit_init): Use the right
	macros to set the default minimum and maximum values.

	* clutter/clutter-fixed.c (param_fixed_init): Ditto as above.
2008-04-28 13:37:28 +00:00
Emmanuele Bassi
fd70c7df49 2008-04-17 Emmanuele Bassi <ebassi@openedhand.com>
* clutter/clutter-fixed.c:
	(clutter_value_transform_fixed_int),
	(clutter_value_transform_fixed_double),
	(clutter_value_transform_fixed_float),
	(clutter_fixed_get_type): Add GValue transformation functions
	for ClutterFixed; copying a CLUTTER_TYPE_FIXED GValue into
	a G_TYPE_FLOAT/G_TYPE_DOUBLE one will automatically transform
	the fixed point representation into a floating point one. Also
	add the G_TYPE_INT transformation function to do a plain
	fixed->int copy.

	* clutter/clutter-units.c:
	(clutter_value_transform_unit_int),
	(clutter_unit_get_type): Add a unit->int transformation function.
2008-04-17 14:08:26 +00:00
Emmanuele Bassi
3d30622d96 2008-04-17 Emmanuele Bassi <ebassi@openedhand.com>
* clutter/clutter-units.c (clutter_value_get_unit): Fix typo
	in the function name.
2008-04-17 11:40:46 +00:00
Emmanuele Bassi
d1ba07d0e7 2008-04-17 Emmanuele Bassi <ebassi@openedhand.com>
* clutter/Makefile.am: Add clutter-units.c

	* clutter/clutter-units.[ch]: Add a ClutterUnit fundamental
	type, and wrappers for storing it into GValues; also add a
	GParamSpec subclass for defining parameters holding ClutterUnit
	values. This allows creating GObject properties using units.

	* doc/reference/clutter-sections.txt: Document the newly
	added API.
2008-04-17 09:13:12 +00:00