René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Arrow annotations behave differently between 1.3.1 and 1.4.2","articleBody":"~~Sorry, here's another one without a simplified test case. I will try and get to that tomorrow. For this, you will need matplotlib 1.4.2 and the development version of [ObsPy](https://github.com/obspy/obspy). Then run `obspy3-runtests -d obspy.station.tests.test_station.StationTest.test_response_plot`.~~ Test case is below.\n\nWith mpl 1.3.1, the plot is as so:\n![station_response](https://cloud.githubusercontent.com/assets/302469/5798822/65e23d88-9f99-11e4-9a24-874f3eee5285.png)\n\nWith mpl 1.4.2 (and master), the plot is as so:\n![station_response](https://cloud.githubusercontent.com/assets/302469/5798827/77bac822-9f99-11e4-9848-b359a5693c6e.png)\n\n![station_response-failed-diff](https://cloud.githubusercontent.com/assets/302469/5798832/7feab8fe-9f99-11e4-9aa1-8b5a01ee8727.png)\n\nYou can see that the arrows are thinner and shifted a bit.\n\nI believe the relevant bit of code is the following, but I will try to simplify it later:\n\n```\n            trans_above = blended_transform_factory(ax1.transData,\n                                                    ax1.transAxes)\n            trans_right = blended_transform_factory(ax1.transAxes,\n                                                    ax1.transData)\n            arrowprops = dict(\n                arrowstyle=\"wedge,tail_width=1.4,shrink_factor=0.8\", fc=color)\n            bbox = dict(boxstyle=\"round\", fc=\"w\")\n            ax1.annotate(\"%.1g\" % self.instrument_sensitivity.frequency,\n                         (self.instrument_sensitivity.frequency, 1.0),\n                         xytext=(self.instrument_sensitivity.frequency, 1.1),\n                         xycoords=trans_above, textcoords=trans_above,\n                         ha=\"center\", va=\"bottom\",\n                         arrowprops=arrowprops, bbox=bbox)\n            ax1.annotate(\"%.1e\" % self.instrument_sensitivity.value,\n                         (1.0, self.instrument_sensitivity.value),\n                         xytext=(1.05, self.instrument_sensitivity.value),\n                         xycoords=trans_right, textcoords=trans_right,\n                         ha=\"left\", va=\"center\",\n                         arrowprops=arrowprops, bbox=bbox)\n```\n\nI did a bisect and the bad commit was:\n\n```\n3363b125715724ad89d4b33cbddb23e31e7277d5 is the first bad commit\ncommit 3363b125715724ad89d4b33cbddb23e31e7277d5\nAuthor: Thomas A Caswell \u003ctcaswell@gmail.com\u003e\nDate:   Tue Aug 27 17:07:58 2013 -0500\n\n    re factored `_AnnoationBase` to push keeping track of there the\n    secondary object is to the sub-classes.\n\n    Added properties to maintain back-compatibility\n\n    added properties to replace xytext and textcoords (xyann, anncoords)\n\n    properly deprecated `textcoord` and `xytext` in favor of `anncoords`\n    and `xyann`.\n\n:040000 040000 f17d8e1a70232471435f96b1faa8550bc697ec32 567d4a0a86bb3d1fb7ec55dc0fa98e86c1dec71a M  doc\n:040000 040000 34339e9d0d9f49477908fc3c3227b1b7b55735b4 4dc225e1358d422aa86f9361672c36e127955bee M  lib\n```\n","author":{"url":"https://github.com/QuLogic","@type":"Person","name":"QuLogic"},"datePublished":"2015-01-19T10:13:33.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":22},"url":"https://github.com/4012/matplotlib/issues/4012"}