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From cca6d3b04b74558e12df3aa43761faaa574c5ff9 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Marco=20Trevisan=20=28Trevi=C3=B1o=29?= <mail@3v1n0.net>
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Date: Fri, 22 Nov 2019 14:50:48 +0100
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Subject: [PATCH 020/181] fp-image-device: Use a GObject signal to notify image
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state changed
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This is more GObject-friendly and we have the automatic call of the vfunc if
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one is set.
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---
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libfprint/fp-image-device.c | 23 +++++++++++++++++------
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1 file changed, 17 insertions(+), 6 deletions(-)
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diff --git a/libfprint/fp-image-device.c b/libfprint/fp-image-device.c
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index 3565b90..692727b 100644
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--- a/libfprint/fp-image-device.c
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+++ b/libfprint/fp-image-device.c
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@@ -69,6 +69,14 @@ enum {
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static GParamSpec *properties[N_PROPS];
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+enum {
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+ FPI_STATE_CHANGED,
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+
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+ LAST_SIGNAL
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+};
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+
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+static guint signals[LAST_SIGNAL] = { 0 };
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+
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/*******************************************************/
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/* TODO:
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@@ -81,7 +89,6 @@ static void
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fp_image_device_change_state (FpImageDevice *self, FpImageDeviceState state)
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{
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FpImageDevicePrivate *priv = fp_image_device_get_instance_private (self);
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- FpImageDeviceClass *cls = FP_IMAGE_DEVICE_GET_CLASS (self);
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/* Cannot change to inactive using this function. */
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g_assert (state != FP_IMAGE_DEVICE_STATE_INACTIVE);
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@@ -94,11 +101,7 @@ fp_image_device_change_state (FpImageDevice *self, FpImageDeviceState state)
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priv->state = state;
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g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_FPI_STATE]);
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-
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- /* change_state is the only callback which is optional and does not
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- * have a default implementation. */
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- if (cls->change_state)
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- cls->change_state (self, state);
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+ g_signal_emit (self, signals[FPI_STATE_CHANGED], 0, priv->state);
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}
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static void
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@@ -356,6 +359,14 @@ fp_image_device_class_init (FpImageDeviceClass *klass)
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FP_IMAGE_DEVICE_STATE_INACTIVE,
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G_PARAM_STATIC_STRINGS | G_PARAM_READABLE);
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+ signals[FPI_STATE_CHANGED] =
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+ g_signal_new ("fp-image-device-state-changed",
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+ G_TYPE_FROM_CLASS (object_class),
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+ G_SIGNAL_RUN_FIRST,
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+ G_STRUCT_OFFSET (FpImageDeviceClass, change_state),
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+ NULL, NULL, NULL,
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+ G_TYPE_NONE, 1, FP_TYPE_IMAGE_DEVICE_STATE);
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+
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g_object_class_install_properties (object_class, N_PROPS, properties);
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}
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--
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2.24.1
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