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Author SHA1 Message Date
Giovanni Campagna
f99d48a0c6 ClutterDragAction: allow constraining the movement of the dragged actor
Allow setting a ClutterRect on the drag action and force the
dragged actor's position to be always within that rectangle (relative
to the actor's parent).

https://bugzilla.gnome.org/show_bug.cgi?id=681168
2012-08-16 18:21:07 +02:00
Emmanuele Bassi
8b03ac6bae Documentation fixes 2012-07-11 15:27:56 +01:00
Emmanuele Bassi
721caece5d drag-action: Add ::drag-progress signal
Overriding the default behaviour of ClutterDragAction::drag-motion is
currently a pain; you either need to subclass the ClutterDragAction and
override the class closure for the signal, or you need to connect to the
signal and call g_signal_stop_emission_by_name() - neither option being
particularly nice or clean. The established pattern for these cases
would be to have a boolean return value on the ::drag-motion signal, but
we cannot do that without breaking ABI.

To solve the issue in a backward compatible way, we should introduce a
new signal, ::drag-progress, with a boolean return value. If the signal
emission chain returns TRUE, the ::drag-motion signal will be emitted,
and the default behaviour will be honoured; if the signal emission chain
returns FALSE, instead, the ::drag-motion signal will not be emitted.

https://bugzilla.gnome.org/show_bug.cgi?id=679451
2012-07-11 13:22:19 +01:00
Emmanuele Bassi
d28e04be72 Move all enumerations to a separate file
This should allow sharing types, and we can avoid glib-mkenums thrawling
the whole repository for enumerations.
2011-10-11 17:59:46 +01:00
Emmanuele Bassi
82a30d8e0b drag-action: Allow using settings for the drag threshold
ClutterDragAction should be able to use the newly added ClutterSettings
property exposing the system's drag threshold.

Currently, the x-drag-threshold and the y-drag-threshold properties (and
relative accessors) use an unsigned integer for their values; we should
be able to safely expand the range to include -1 as the minimum value,
and use this new value to tell the ClutterDragAction that it should query
the ClutterSettings object for the drag threshold.

The storage of the properties has been changed, albeit in a compatible
way, as GObject installs a uint ↔ int transformation function for GValue
automatically.

The setter for the drag thresholds has been changes to use a signed
integer, but the getter has been updated to always Do The Right Thing™:
it never returns -1 but, instead, will return the valid drag threshold,
either from the value set or from the Settings singleton.

This change is ABI compatible.

http://bugzilla.clutter-project.org/show_bug.cgi?id=2583
2011-03-09 14:21:01 +00:00
Henrik Hedberg
1eae9fcd7e drag-action: Added x-drag-threshold and y-drag-threshold properties
*** This is an API change ***

Replaced the original drag-threshold property with two separate
horizontal (x-drag-threshold) and vertical (y-drag-threshold)
thresholds.

It is some times necessary to have different drag thresholds for the
horizontal and vertical axes. For example, when a draggable actor is
inside a horizontal scrolling area, only vertical movement must begin
dragging. That can be achieved by setting the x-drag-threshold to
G_MAXUINT while y-drag-threshold is something usual, say, 20 pixels.

This is different than drag axis, because after the threshold
has been cleared by the pointer, the draggable actor can be dragged
along both axes (if allowed by the drag-axis property).

http://bugzilla.clutter-project.org/show_bug.cgi?id=2291

Signed-off-by: Emmanuele Bassi <ebassi@linux.intel.com>
2010-09-07 10:40:49 +01:00
Emmanuele Bassi
f97d16cd2d drag-action: Remove the press event button
Both ::drag-begin and ::drag-end have a "button" argument - even though
we assume internally, and externally, that dragging can only be the
result of a primary button operation.
2010-06-12 17:45:54 +01:00
Emmanuele Bassi
cfb05bfb09 docs: Fix DragAction documentation
The ::drag-motion signal does not have a ModifierType argument; also,
there's no need to connect to the ::drag-motion signal any more.
2010-05-25 13:11:51 +01:00
Emmanuele Bassi
4fd74e71e6 action: Add DragAction, an action implementing drag capabilities
DragAction is an Action sub-class that provides dragging capabilities to
any actor. DragAction has:

  • drag-begin, drag-motion and drag-end signals, relaying the event
    information like coordinates, button and modifiers to user code;

  • drag-threshold property, for delaying the drag start by a given
    amount of pixels;

  • drag-handle property, to allow using other actors as the drag
    handle.

  • drag-axis property, to allow constraining the dragging to a specific
    axis.

An interactive test demonstrating the various features is also provided.
2010-05-17 16:42:11 +01:00