diff options
| author | Robin Haberkorn <robin.haberkorn@googlemail.com> | 2012-06-12 17:26:00 +0200 |
|---|---|---|
| committer | Robin Haberkorn <robin.haberkorn@googlemail.com> | 2012-06-12 17:29:46 +0200 |
| commit | 68141b1fb33a1bf8497248e3d341d62487df2092 (patch) | |
| tree | cf55e537f503759603fed4f8e441d1759c9ae2df | |
| parent | 95d42f9a3236a3415a4d30aa823520123e21ea0d (diff) | |
| download | experiment-player-68141b1fb33a1bf8497248e3d341d62487df2092.tar.gz | |
resolve numeric instability when calculating contribution pixel positions
the pixel distance between contributions must be independant of the current time to avoid flickering in the text rendering when time progresses
| -rw-r--r-- | lib/gtk-experiment-widgets/gtk-experiment-transcript.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/lib/gtk-experiment-widgets/gtk-experiment-transcript.c b/lib/gtk-experiment-widgets/gtk-experiment-transcript.c index b33d230..d722d94 100644 --- a/lib/gtk-experiment-widgets/gtk-experiment-transcript.c +++ b/lib/gtk-experiment-widgets/gtk-experiment-transcript.c @@ -406,7 +406,7 @@ gtk_experiment_transcript_text_layer_redraw(GtkExperimentTranscript *trans) { GtkWidget *widget = GTK_WIDGET(trans); - gint64 current_time = 0; + gint64 current_time = 0, current_time_px; gint last_contrib_y = -1; gdk_draw_rectangle(GDK_DRAWABLE(trans->priv->layer_text), @@ -427,6 +427,7 @@ gtk_experiment_transcript_text_layer_redraw(GtkExperimentTranscript *trans) if (trans->priv->time_adjustment != NULL) current_time = (gint64)gtk_adjustment_get_value(GTK_ADJUSTMENT(trans->priv->time_adjustment)); + current_time_px = TIME_TO_PX(current_time); for (GList *cur = experiment_reader_get_contribution_by_time( trans->priv->contribs, @@ -437,7 +438,7 @@ gtk_experiment_transcript_text_layer_redraw(GtkExperimentTranscript *trans) cur->data; gint y = widget->allocation.height - - TIME_TO_PX(current_time - contrib->start_time); + (current_time_px - TIME_TO_PX(contrib->start_time)); int logical_height; PangoAttrList *attrib_list; |