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visualizer-view: fix selections when scrolling

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If we have a scrolled view, we might be a bit off on the
selected range until this commit. This adjusts for the scrolled
area and ensures that both ticks and selections land in the
right place.
This commit is contained in:
Christian Hergert
2016-10-08 15:36:01 -07:00
parent 527f95fa77
commit aa61c43547
1 changed files with 8 additions and 13 deletions
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21
lib/sp-visualizer-view.c
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@ -95,10 +95,7 @@ get_time_from_coordinates (SpVisualizerView *self,
{
SpVisualizerViewPrivate *priv = sp_visualizer_view_get_instance_private (self);
SpVisualizerRow *row1 = NULL;
GtkAdjustment *hadjustment;
GtkAllocation alloc;
gdouble nsec_per_pixel;
gdouble value;
gint64 begin_time;
gint64 end_time;
gint graph_width;
@ -121,18 +118,11 @@ get_time_from_coordinates (SpVisualizerView *self,
if (!SP_IS_VISUALIZER_ROW (row1))
return 0;
hadjustment = gtk_scrolled_window_get_hadjustment (priv->scroller);
value = gtk_adjustment_get_value (hadjustment);
begin_time = sp_capture_reader_get_start_time (priv->reader);
end_time = sp_capture_reader_get_end_time (priv->reader);
graph_width = _sp_visualizer_row_get_graph_width (row1);
nsec_per_pixel = (end_time - begin_time) / (gdouble)graph_width;
begin_time += value * nsec_per_pixel;
end_time = begin_time + (alloc.width * nsec_per_pixel);
return begin_time + ((end_time - begin_time) / (gdouble)alloc.width * x);
return begin_time + ((end_time - begin_time) * (x / (gdouble)graph_width));
}
static gint
@ -203,16 +193,21 @@ static void
sp_visualizer_view_update_ticks (SpVisualizerView *self)
{
SpVisualizerViewPrivate *priv = sp_visualizer_view_get_instance_private (self);
GtkAdjustment *hadjustment;
GtkAllocation alloc;
gdouble value;
gint64 begin_time;
gint64 end_time;
g_assert (SP_IS_VISUALIZER_VIEW (self));
hadjustment = gtk_scrolled_window_get_hadjustment (priv->scroller);
value = gtk_adjustment_get_value (hadjustment);
gtk_widget_get_allocation (GTK_WIDGET (self), &alloc);
begin_time = get_time_from_coordinates (self, alloc.x, alloc.y);
end_time = get_time_from_coordinates (self, alloc.x + alloc.width, alloc.y);
begin_time = get_time_from_coordinates (self, alloc.x + value, alloc.y);
end_time = get_time_from_coordinates (self, alloc.x + value + alloc.width, alloc.y);
sp_visualizer_ticks_set_time_range (priv->ticks, begin_time, end_time);
}