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libsysprof-gtk: add label expression for time span

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So we can show labels on things if zoomed in enough. We should also make
this available for hover/query-tooltip/etc.
This commit is contained in:
Christian Hergert
2023-06-30 16:56:41 -07:00
parent e8c11ea7d9
commit 6fe6ebf081
5 changed files with 135 additions and 7 deletions
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38
src/libsysprof-gtk/sysprof-time-span-layer.c
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@ -138,6 +138,18 @@ sysprof_time_span_layer_snapshot (GtkWidget *widget,
if (color->alpha > 0)
{
const GdkRGBA *label_color = _sysprof_chart_layer_get_accent_fg_color ();
PangoLayout *layout = gtk_widget_create_pango_layout (GTK_WIDGET (self), NULL);
int layout_y;
int layout_h;
pango_layout_set_single_paragraph_mode (layout, TRUE);
pango_layout_set_ellipsize (layout, PANGO_ELLIPSIZE_END);
pango_layout_set_text (layout, "XM0", -1);
pango_layout_get_pixel_size (layout, NULL, &layout_h);
layout_y = (height - layout_h) / 2;
/* First pass, draw our rectangles for duration which we
* always want in the background compared to "points" which
* are marks w/o a duration.
@ -147,6 +159,12 @@ sysprof_time_span_layer_snapshot (GtkWidget *widget,
float begin = x_values[i];
float end = x2_values[i];
if (end < .0)
continue;
if (begin > 1.)
break;
if (begin != end)
{
graphene_rect_t rect;
@ -157,7 +175,7 @@ sysprof_time_span_layer_snapshot (GtkWidget *widget,
ceilf ((end - begin) * width),
height);
/* Ignore empty sized draws */
/* Ignore empty draws */
if (rect.size.width == 0)
continue;
@ -169,8 +187,26 @@ sysprof_time_span_layer_snapshot (GtkWidget *widget,
last_end_x = end_x;
gtk_snapshot_append_color (snapshot, color, &rect);
if (rect.size.width > 20)
{
g_autofree char *label = sysprof_time_series_dup_label (self->series, i);
if (label != NULL)
{
pango_layout_set_text (layout, label, -1);
pango_layout_set_width (layout, (rect.size.width - 6) * PANGO_SCALE);
gtk_snapshot_save (snapshot);
gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (rect.origin.x + 3, layout_y));
gtk_snapshot_append_layout (snapshot, layout, label_color);
gtk_snapshot_restore (snapshot);
}
}
}
}
g_object_unref (layout);
}
if (event_color->alpha > 0)