From 225f4f6cbeb7a9a6e8ae35f15081d0c86ccdb052 Mon Sep 17 00:00:00 2001
From: Konrad Hofbauer <hofbauer@webrtc.org>
Date: Tue, 26 Mar 2019 13:23:54 +0100
Subject: [PATCH] Link x-axes across all figures for synchronized zooming in
 the interactive eventlogvisualizer plots.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Bug: none
Change-Id: I27b414ab8a7f1b5f1983ec35e61c4eccb89e89d7
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/128876
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Commit-Queue: Konrad Hofbauer <hofbauer@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27294}
---
 rtc_tools/event_log_visualizer/plot_python.cc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/rtc_tools/event_log_visualizer/plot_python.cc b/rtc_tools/event_log_visualizer/plot_python.cc
index 2def0c3a6e..bb42556250 100644
--- a/rtc_tools/event_log_visualizer/plot_python.cc
+++ b/rtc_tools/event_log_visualizer/plot_python.cc
@@ -169,6 +169,12 @@ void PythonPlotCollection::Draw() {
   printf("import colorsys\n");
   for (size_t i = 0; i < plots_.size(); i++) {
     printf("plt.figure(%zu)\n", i);
+    // Link x-axes across all figures for synchronized zooming.
+    if (i == 0) {
+      printf("axis0 = plt.subplot(111)\n");
+    } else {
+      printf("plt.subplot(111, sharex=axis0)\n");
+    }
     plots_[i]->Draw();
   }
   printf("plt.show()\n");