249 lines
6.7 KiB
C
249 lines
6.7 KiB
C
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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
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/**
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* SECTION:shell-button-box
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* @short_description: A box with properties useful for implementing buttons
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*
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* A #BigBox subclass which translates lower-level Clutter button events
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* into higher level properties which are useful for implementing "button-like"
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* actors.
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*/
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#include "shell-button-box.h"
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G_DEFINE_TYPE(ShellButtonBox, shell_button_box, BIG_TYPE_BOX);
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struct _ShellButtonBoxPrivate {
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gboolean held;
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gboolean hover;
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gboolean pressed;
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};
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/* Signals */
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enum
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{
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ACTIVATE,
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LAST_SIGNAL
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};
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enum {
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PROP_0,
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PROP_HOVER,
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PROP_PRESSED,
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};
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static guint shell_button_box_signals [LAST_SIGNAL] = { 0 };
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static void
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set_hover (ShellButtonBox *box,
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gboolean hover)
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{
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if (box->priv->hover == hover)
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return;
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box->priv->hover = hover;
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g_object_notify (G_OBJECT (box), "hover");
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}
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static void
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set_pressed (ShellButtonBox *box,
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gboolean pressed)
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{
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if (box->priv->pressed == pressed)
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return;
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box->priv->pressed = pressed;
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g_object_notify (G_OBJECT (box), "pressed");
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}
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static gboolean
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shell_button_box_contains (ShellButtonBox *box,
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ClutterActor *actor)
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{
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while (actor != NULL && actor != (ClutterActor*)box)
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{
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actor = clutter_actor_get_parent (actor);
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}
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return actor != NULL;
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}
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static gboolean
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shell_button_box_on_enter (ShellButtonBox *box,
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ClutterEvent *event,
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gpointer user_data)
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{
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if (shell_button_box_contains (box, event->crossing.related))
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return TRUE;
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if (!shell_button_box_contains (box, clutter_event_get_source (event)))
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return TRUE;
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set_hover (box, TRUE);
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if (box->priv->held)
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set_pressed (box, TRUE);
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return TRUE;
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}
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static gboolean
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shell_button_box_on_leave (ShellButtonBox *box,
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ClutterEvent *event,
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gpointer user_data)
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{
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if (shell_button_box_contains (box, event->crossing.related))
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return TRUE;
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set_hover (box, FALSE);
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set_pressed (box, FALSE);
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return TRUE;
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}
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static gboolean
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shell_button_box_on_press (ShellButtonBox *box,
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ClutterEvent *event,
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gpointer user_data)
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{
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ClutterActor *source;
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if (box->priv->held)
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return TRUE;
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source = clutter_event_get_source (event);
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if (!shell_button_box_contains (box, source))
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return FALSE;
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box->priv->held = TRUE;
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clutter_grab_pointer (CLUTTER_ACTOR (box));
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set_pressed (box, TRUE);
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return TRUE;
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}
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static gboolean
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shell_button_box_on_release (ShellButtonBox *box,
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ClutterEvent *event,
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gpointer user_data)
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{
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ClutterActor *source;
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if (!box->priv->held)
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return TRUE;
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source = clutter_event_get_source (event);
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box->priv->held = FALSE;
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clutter_ungrab_pointer ();
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if (!shell_button_box_contains (box, source))
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return FALSE;
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set_pressed (box, FALSE);
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g_signal_emit (G_OBJECT (box), shell_button_box_signals[ACTIVATE], 0);
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return TRUE;
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}
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static void
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shell_button_box_set_property(GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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switch (prop_id)
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{
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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shell_button_box_get_property(GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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ShellButtonBox *box = SHELL_BUTTON_BOX (object);
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switch (prop_id)
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{
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case PROP_PRESSED:
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g_value_set_boolean (value, box->priv->pressed);
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break;
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case PROP_HOVER:
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g_value_set_boolean (value, box->priv->hover);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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shell_button_box_class_init (ShellButtonBoxClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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gobject_class->get_property = shell_button_box_get_property;
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gobject_class->set_property = shell_button_box_set_property;
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/**
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* ShellButtonBox::activate
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* @box: The #ShellButtonBox
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*
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* This signal is emitted when the button should take the action
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* associated with button click+release.
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*/
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shell_button_box_signals[ACTIVATE] =
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g_signal_new ("activate",
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G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST,
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0,
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NULL, NULL,
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g_cclosure_marshal_VOID__VOID,
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G_TYPE_NONE, 0);
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/**
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* ShellButtonBox:hover
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*
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* This property tracks whether the mouse is over the button; note this
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* state is independent of whether the button is pressed.
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*/
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g_object_class_install_property (gobject_class,
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PROP_HOVER,
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g_param_spec_boolean ("hover",
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"Hovering state",
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"Whether the mouse is over the button",
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FALSE,
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G_PARAM_READABLE));
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/**
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* ShellButtonBox:pressed
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*
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* This property tracks whether the button should have a "pressed in"
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* effect.
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*/
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g_object_class_install_property (gobject_class,
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PROP_PRESSED,
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g_param_spec_boolean ("pressed",
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"Pressed state",
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"Whether the button is currently pressed",
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FALSE,
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G_PARAM_READABLE));
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g_type_class_add_private (gobject_class, sizeof (ShellButtonBoxPrivate));
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}
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static void
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shell_button_box_init (ShellButtonBox *self)
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{
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self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self, SHELL_TYPE_BUTTON_BOX,
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ShellButtonBoxPrivate);
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g_signal_connect (G_OBJECT (self), "enter-event", G_CALLBACK(shell_button_box_on_enter), NULL);
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g_signal_connect (G_OBJECT (self), "leave-event", G_CALLBACK(shell_button_box_on_leave), NULL);
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g_signal_connect (G_OBJECT (self), "button-press-event", G_CALLBACK(shell_button_box_on_press), NULL);
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g_signal_connect (G_OBJECT (self), "button-release-event", G_CALLBACK(shell_button_box_on_release), NULL);
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}
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