René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Dragging Legend not working properly ","articleBody":"### Bug summary\r\n\r\nThis may not be a bug. It is my use case.\r\n\r\nI have embedded matplotlib in PyQt5 and I am using `Ctrl+C` to copy the figure to clipboard (for pasting to ppt)\r\n\r\nSo in the minimum example attached, pressing `Ctrl+C` reduces figure size to specified size (6x4). This is kind of a print preview for me. So I adjust legend/annotations in the smaller figure.\r\n\r\nDragging legend is not working properly in the smaller figure. It used to work in older versions for me. So I went through the changes. Reverting the change done in the following line of `blit` function of `/backends/backend_qt.py` fixes the problem (Changed as part of #17478)\r\n\r\n`self.repaint(l, self.rect().height() - t, w, h)`\r\n to\r\n ` self.repaint(l, int(self.renderer.height / self.device_pixel_ratio)- t, w, h)`\r\n\r\nFor the normal figure `self.rect().height()` is equal to `int(self.renderer.height / self.device_pixel_ratio)`\r\n\r\nBut for the smaller figure `self.rect().height()` is different from `int(self.renderer.height / self.device_pixel_ratio)`\r\n\r\nIs this ok?\r\n\r\nThanks\r\n\r\n\r\n### Code for reproduction\r\n\r\n```python\r\nimport io\r\nimport sys\r\nfrom PyQt5.QtWidgets import QWidget, QApplication, QShortcut, QVBoxLayout\r\nfrom PyQt5.QtCore import QMimeData\r\nfrom PyQt5.QtGui import QKeySequence\r\n\r\nfrom matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas\r\nfrom matplotlib.figure import Figure\r\n\r\nimport random\r\n\r\nclass Window(QWidget):\r\n    def __init__(self, parent=None):\r\n        super(Window, self).__init__(parent)\r\n        self.figure = Figure()\r\n\r\n        data = [random.random() for _ in range(10)]\r\n\r\n        ax = self.figure.add_subplot(111)\r\n        ax.plot(data, '*-',label='RandomData')\r\n        legend = ax.legend()\r\n        \r\n        self.canvas = FigureCanvas(self.figure)\r\n        self.canvas.draw()\r\n\r\n        legend.set_draggable(True,use_blit=True) # Dragging is not ok in smaller figure/ ok in normal figure\r\n        # legend.set_draggable(True) # Dragging is ok in smaller figure when blitting is off\r\n\r\n\r\n        ctc = QShortcut(QKeySequence(\"Ctrl+C\"), self)\r\n        ctc.activated.connect(self.copy_to_clipboard)\r\n\r\n        layout = QVBoxLayout()\r\n        layout.addWidget(self.canvas)\r\n        self.setLayout(layout)\r\n\r\n    def copy_to_clipboard(self):\r\n        fig = self.canvas.figure\r\n        fig.set_size_inches(6,4)\r\n        buf = io.BytesIO()\r\n        fig.savefig(buf,dpi=300,transparent=True,bbox_inches='tight')\r\n        mimeData = QMimeData()\r\n        mimeData.setData(\"PNG\",buf.getvalue())\r\n        QApplication.clipboard().setMimeData(mimeData)\r\n        buf.close()\r\n\r\n    \r\nif __name__ == '__main__':\r\n    app = QApplication(sys.argv)\r\n    main = Window()\r\n    main.showMaximized()\r\n    sys.exit(app.exec_())\r\n```\r\n\r\n\r\n### Actual outcome\r\n\r\n![N5hiEqY3Hg](https://user-images.githubusercontent.com/6796654/208227803-dcf61b8f-6742-4cfd-8247-96d0e3fc6281.gif)\r\n\r\n\r\n### Expected outcome\r\n\r\n![gUBmnxj0rD](https://user-images.githubusercontent.com/6796654/208227809-85c49007-bfe6-4e80-9e2b-241b5b9a8275.gif)\r\n\r\n\r\n### Additional information\r\n\r\n_No response_\r\n\r\n### Operating system\r\n\r\nWindows\r\n\r\n### Matplotlib Version\r\n\r\n3.6.2\r\n\r\n### Matplotlib Backend\r\n\r\nPyQt5\r\n\r\n### Python version\r\n\r\n3.8.10\r\n\r\n### Jupyter version\r\n\r\nNA\r\n\r\n### Installation\r\n\r\npip","author":{"url":"https://github.com/inxp","@type":"Person","name":"inxp"},"datePublished":"2022-12-17T06:05:30.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/24755/matplotlib/issues/24755"}