René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Figure resize when saving a plot","articleBody":"### Bug report\r\n\r\n**Bug summary**\r\n\r\nThe `print_figure` function in the `FigureCanvasBase` class records the current figure's dpi, sets it to the requested dpi for the saved figure, and then resets it to the original. Setting the dpi invokes a property function, `_set_dpi` that calls the figure's `set_size_inches` method, which then triggers a resize of the figure manager. \r\n\r\nThis resize is not evident when I use the standard Pyplot commands within a Qt console, presumably because the plot size doesn't change. However, I have embedded the Matplotlib figure in a PyQt GUI where I don't have the toolbar in the same widget, and it causes a noticeable size change for a fraction of a second before the second dpi reset restores the old size.\r\n\r\n**Possible solution**\r\n\r\nI would like to suggest that the `FigureCanvasBase` `print_figure` function should not invoke the dpi property, but set and then reset the figure's hidden variable, `_dpi`, which will not trigger the redundant canvas resize. I can submit a pull request, but I wanted to check if there would be side effects.\r\n\r\n**Matplotlib version**\r\n  * Matplotlib Version: 2.0.2\r\n  * Operating System: Mac OS 10.12.5\r\n  * Python Version: 2.7.11\r\n  * PyQt 4.8.7","author":{"url":"https://github.com/rayosborn","@type":"Person","name":"rayosborn"},"datePublished":"2017-06-09T18:17:18.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":12},"url":"https://github.com/8736/matplotlib/issues/8736"}