250 lines
7.4 KiB
C
250 lines
7.4 KiB
C
#include <stdlib.h>
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#include <clutter/clutter.h>
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static gboolean
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on_enter (ClutterActor *actor,
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ClutterEvent *event)
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{
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ClutterTransition *t;
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t = clutter_actor_get_transition (actor, "curl");
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if (t == NULL)
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{
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t = clutter_property_transition_new ("@effects.curl.period");
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clutter_timeline_set_duration (CLUTTER_TIMELINE (t), 250);
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clutter_actor_add_transition (actor, "curl", t);
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g_object_unref (t);
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}
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clutter_transition_set_from (t, G_TYPE_DOUBLE, 0.0);
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clutter_transition_set_to (t, G_TYPE_DOUBLE, 0.25);
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clutter_timeline_rewind (CLUTTER_TIMELINE (t));
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clutter_timeline_start (CLUTTER_TIMELINE (t));
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return CLUTTER_EVENT_STOP;
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}
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static gboolean
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on_leave (ClutterActor *actor,
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ClutterEvent *event)
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{
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ClutterTransition *t;
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t = clutter_actor_get_transition (actor, "curl");
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if (t == NULL)
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{
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t = clutter_property_transition_new ("@effects.curl.period");
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clutter_timeline_set_duration (CLUTTER_TIMELINE (t), 250);
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clutter_actor_add_transition (actor, "curl", t);
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g_object_unref (t);
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}
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clutter_transition_set_from (t, G_TYPE_DOUBLE, 0.25);
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clutter_transition_set_to (t, G_TYPE_DOUBLE, 0.0);
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clutter_timeline_rewind (CLUTTER_TIMELINE (t));
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clutter_timeline_start (CLUTTER_TIMELINE (t));
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return CLUTTER_EVENT_STOP;
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}
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static void
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on_drag_begin (ClutterDragAction *action,
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ClutterActor *actor,
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gfloat event_x,
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gfloat event_y,
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ClutterModifierType modifiers)
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{
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gboolean is_copy = (modifiers & CLUTTER_SHIFT_MASK) ? TRUE : FALSE;
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ClutterActor *drag_handle = NULL;
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ClutterTransition *t;
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if (is_copy)
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{
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ClutterActor *stage = clutter_actor_get_stage (actor);
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drag_handle = clutter_actor_new ();
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clutter_actor_set_size (drag_handle, 48, 48);
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clutter_actor_set_background_color (drag_handle, CLUTTER_COLOR_DarkSkyBlue);
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clutter_actor_add_child (stage, drag_handle);
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clutter_actor_set_position (drag_handle, event_x, event_y);
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}
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else
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drag_handle = actor;
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clutter_drag_action_set_drag_handle (action, drag_handle);
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/* fully desaturate the actor */
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t = clutter_actor_get_transition (actor, "disable");
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if (t == NULL)
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{
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t = clutter_property_transition_new ("@effects.disable.factor");
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clutter_timeline_set_duration (CLUTTER_TIMELINE (t), 250);
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clutter_actor_add_transition (actor, "disable", t);
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g_object_unref (t);
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}
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clutter_transition_set_from (t, G_TYPE_DOUBLE, 0.0);
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clutter_transition_set_to (t, G_TYPE_DOUBLE, 1.0);
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clutter_timeline_rewind (CLUTTER_TIMELINE (t));
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clutter_timeline_start (CLUTTER_TIMELINE (t));
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}
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static void
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on_drag_end (ClutterDragAction *action,
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ClutterActor *actor,
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gfloat event_x,
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gfloat event_y,
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ClutterModifierType modifiers)
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{
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ClutterActor *drag_handle;
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ClutterTransition *t;
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drag_handle = clutter_drag_action_get_drag_handle (action);
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if (actor != drag_handle)
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{
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gfloat real_x, real_y;
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ClutterActor *parent;
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/* if we are dragging a copy we can destroy the copy now
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* and animate the real actor to the drop coordinates,
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* transformed in the parent's coordinate space
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*/
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clutter_actor_save_easing_state (drag_handle);
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clutter_actor_set_easing_mode (drag_handle, CLUTTER_LINEAR);
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clutter_actor_set_opacity (drag_handle, 0);
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clutter_actor_restore_easing_state (drag_handle);
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g_signal_connect (drag_handle, "transitions-completed",
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G_CALLBACK (clutter_actor_destroy),
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NULL);
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parent = clutter_actor_get_parent (actor);
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clutter_actor_transform_stage_point (parent, event_x, event_y,
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&real_x,
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&real_y);
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clutter_actor_save_easing_state (actor);
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clutter_actor_set_easing_mode (actor, CLUTTER_EASE_OUT_CUBIC);
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clutter_actor_set_position (actor, real_x, real_y);
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clutter_actor_restore_easing_state (actor);
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}
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t = clutter_actor_get_transition (actor, "disable");
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if (t == NULL)
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{
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t = clutter_property_transition_new ("@effects.disable.factor");
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clutter_timeline_set_duration (CLUTTER_TIMELINE (t), 250);
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clutter_actor_add_transition (actor, "disable", t);
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g_object_unref (t);
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}
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clutter_transition_set_from (t, G_TYPE_DOUBLE, 1.0);
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clutter_transition_set_to (t, G_TYPE_DOUBLE, 0.0);
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clutter_timeline_rewind (CLUTTER_TIMELINE (t));
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clutter_timeline_start (CLUTTER_TIMELINE (t));
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}
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static ClutterDragAxis
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get_drag_axis (const gchar *str)
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{
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if (str == NULL || *str == '\0')
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return CLUTTER_DRAG_AXIS_NONE;
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if (*str == 'x' || *str == 'X')
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return CLUTTER_DRAG_X_AXIS;
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if (*str == 'y' || *str == 'Y')
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return CLUTTER_DRAG_Y_AXIS;
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g_warn_if_reached ();
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return CLUTTER_DRAG_AXIS_NONE;
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}
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static gchar *drag_axis = NULL;
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static gint x_drag_threshold = 0;
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static gint y_drag_threshold = 0;
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static GOptionEntry entries[] = {
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{
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"x-threshold", 'x',
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0,
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G_OPTION_ARG_INT,
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&x_drag_threshold,
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"Set the horizontal drag threshold", "PIXELS"
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},
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{
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"y-threshold", 'y',
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0,
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G_OPTION_ARG_INT,
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&y_drag_threshold,
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"Set the vertical drag threshold", "PIXELS"
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},
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{
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"axis", 'a',
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0,
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G_OPTION_ARG_STRING,
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&drag_axis,
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"Set the drag axis", "AXIS"
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},
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{ NULL }
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};
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int
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main (int argc, char *argv[])
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{
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ClutterActor *stage, *handle;
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ClutterAction *action;
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GError *error;
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error = NULL;
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if (clutter_init_with_args (&argc, &argv,
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"test-drag",
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entries,
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NULL,
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&error) != CLUTTER_INIT_SUCCESS)
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{
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g_print ("Unable to run drag-action: %s\n", error->message);
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g_error_free (error);
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return EXIT_FAILURE;
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}
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stage = clutter_stage_new ();
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clutter_stage_set_title (CLUTTER_STAGE (stage), "Drag Test");
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clutter_actor_set_size (stage, 800, 600);
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g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
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handle = clutter_actor_new ();
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clutter_actor_set_background_color (handle, CLUTTER_COLOR_SkyBlue);
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clutter_actor_set_size (handle, 128, 128);
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clutter_actor_set_position (handle, (800 - 128) / 2, (600 - 128) / 2);
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clutter_actor_set_reactive (handle, TRUE);
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clutter_actor_add_child (stage, handle);
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g_signal_connect (handle, "enter-event", G_CALLBACK (on_enter), NULL);
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g_signal_connect (handle, "leave-event", G_CALLBACK (on_leave), NULL);
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action = clutter_drag_action_new ();
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clutter_drag_action_set_drag_threshold (CLUTTER_DRAG_ACTION (action),
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x_drag_threshold,
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y_drag_threshold);
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clutter_drag_action_set_drag_axis (CLUTTER_DRAG_ACTION (action),
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get_drag_axis (drag_axis));
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g_signal_connect (action, "drag-begin", G_CALLBACK (on_drag_begin), NULL);
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g_signal_connect (action, "drag-end", G_CALLBACK (on_drag_end), NULL);
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clutter_actor_add_action (handle, action);
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clutter_actor_add_effect_with_name (handle, "disable", clutter_desaturate_effect_new (0.0));
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clutter_actor_add_effect_with_name (handle, "curl", clutter_page_turn_effect_new (0.0, 45.0, 12.0));
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clutter_actor_show (stage);
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clutter_main ();
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return EXIT_SUCCESS;
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}
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