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libsysprof-gtk: add example for drawing position line

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This commit is contained in:
Christian Hergert
2023-06-30 10:54:19 -07:00
parent ef5923eb08
commit 0334c4768d
2 changed files with 88 additions and 0 deletions
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81
src/libsysprof-gtk/sysprof-tracks-view.c
View File

@ -32,6 +32,9 @@ struct _SysprofTracksView
SysprofSession *session;
GtkListView *list_view;
double motion_x;
double motion_y;
};
enum {
@ -44,6 +47,77 @@ G_DEFINE_FINAL_TYPE (SysprofTracksView, sysprof_tracks_view, GTK_TYPE_WIDGET)
static GParamSpec *properties [N_PROPS];
static void
sysprof_tracks_view_motion_enter_cb (SysprofTracksView *self,
double x,
double y,
GtkEventControllerMotion *motion)
{
g_assert (SYSPROF_IS_TRACKS_VIEW (self));
g_assert (GTK_IS_EVENT_CONTROLLER_MOTION (motion));
self->motion_x = x;
self->motion_y = y;
gtk_widget_queue_draw (GTK_WIDGET (self));
}
static void
sysprof_tracks_view_motion_leave_cb (SysprofTracksView *self,
GtkEventControllerMotion *motion)
{
g_assert (SYSPROF_IS_TRACKS_VIEW (self));
g_assert (GTK_IS_EVENT_CONTROLLER_MOTION (motion));
self->motion_x = -1;
self->motion_y = -1;
gtk_widget_queue_draw (GTK_WIDGET (self));
}
static void
sysprof_tracks_view_motion_cb (SysprofTracksView *self,
double x,
double y,
GtkEventControllerMotion *motion)
{
g_assert (SYSPROF_IS_TRACKS_VIEW (self));
g_assert (GTK_IS_EVENT_CONTROLLER_MOTION (motion));
self->motion_x = x;
self->motion_y = y;
gtk_widget_queue_draw (GTK_WIDGET (self));
}
static void
sysprof_tracks_view_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot)
{
SysprofTracksView *self = (SysprofTracksView *)widget;
double x, y;
g_assert (SYSPROF_IS_TRACKS_VIEW (self));
g_assert (GTK_IS_SNAPSHOT (snapshot));
GTK_WIDGET_CLASS (sysprof_tracks_view_parent_class)->snapshot (widget, snapshot);
if (self->motion_x == -1 && self->motion_y == -1)
return;
gtk_widget_translate_coordinates (GTK_WIDGET (self->list_view),
GTK_WIDGET (self),
self->motion_x, 0,
&x, &y);
gtk_snapshot_append_color (snapshot,
&(GdkRGBA) {0,0,0,.3},
&GRAPHENE_RECT_INIT (x, y, 1,
gtk_widget_get_height (GTK_WIDGET (self->list_view))));
}
static void
sysprof_tracks_view_dispose (GObject *object)
{
@ -108,6 +182,8 @@ sysprof_tracks_view_class_init (SysprofTracksViewClass *klass)
object_class->get_property = sysprof_tracks_view_get_property;
object_class->set_property = sysprof_tracks_view_set_property;
widget_class->snapshot = sysprof_tracks_view_snapshot;
properties[PROP_SESSION] =
g_param_spec_object ("session", NULL, NULL,
SYSPROF_TYPE_SESSION,
@ -118,8 +194,13 @@ sysprof_tracks_view_class_init (SysprofTracksViewClass *klass)
gtk_widget_class_set_template_from_resource (widget_class, "/libsysprof-gtk/sysprof-tracks-view.ui");
gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_BIN_LAYOUT);
gtk_widget_class_set_css_name (widget_class, "tracks");
gtk_widget_class_bind_template_child (widget_class, SysprofTracksView, list_view);
gtk_widget_class_bind_template_callback (widget_class, sysprof_tracks_view_motion_enter_cb);
gtk_widget_class_bind_template_callback (widget_class, sysprof_tracks_view_motion_leave_cb);
gtk_widget_class_bind_template_callback (widget_class, sysprof_tracks_view_motion_cb);
g_type_ensure (SYSPROF_TYPE_TIME_RULER);
g_type_ensure (SYSPROF_TYPE_TRACK_VIEW);
}

7
src/libsysprof-gtk/sysprof-tracks-view.ui
View File

@ -28,6 +28,13 @@
<property name="vexpand">true</property>
<child>
<object class="GtkListView" id="list_view">
<child>
<object class="GtkEventControllerMotion" id="motion">
<signal name="enter" handler="sysprof_tracks_view_motion_enter_cb" swapped="true"/>
<signal name="leave" handler="sysprof_tracks_view_motion_leave_cb" swapped="true"/>
<signal name="motion" handler="sysprof_tracks_view_motion_cb" swapped="true"/>
</object>
</child>
<property name="factory">
<object class="GtkBuilderListItemFactory">
<property name="bytes"><![CDATA[