| | import ctypes |
| |
|
| | from .backend_cairo import cairo, FigureCanvasCairo |
| | from .backend_qt import QtCore, QtGui, _BackendQT, FigureCanvasQT |
| | from .qt_compat import QT_API, _enum |
| |
|
| |
|
| | class FigureCanvasQTCairo(FigureCanvasCairo, FigureCanvasQT): |
| | def draw(self): |
| | if hasattr(self._renderer.gc, "ctx"): |
| | self._renderer.dpi = self.figure.dpi |
| | self.figure.draw(self._renderer) |
| | super().draw() |
| |
|
| | def paintEvent(self, event): |
| | width = int(self.device_pixel_ratio * self.width()) |
| | height = int(self.device_pixel_ratio * self.height()) |
| | if (width, height) != self._renderer.get_canvas_width_height(): |
| | surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, width, height) |
| | self._renderer.set_context(cairo.Context(surface)) |
| | self._renderer.dpi = self.figure.dpi |
| | self.figure.draw(self._renderer) |
| | buf = self._renderer.gc.ctx.get_target().get_data() |
| | if QT_API == "PyQt6": |
| | from PyQt6 import sip |
| | ptr = int(sip.voidptr(buf)) |
| | else: |
| | ptr = buf |
| | qimage = QtGui.QImage( |
| | ptr, width, height, |
| | _enum("QtGui.QImage.Format").Format_ARGB32_Premultiplied) |
| | |
| | |
| | if QT_API == "PySide2" and QtCore.__version_info__ < (5, 12): |
| | ctypes.c_long.from_address(id(buf)).value = 1 |
| | qimage.setDevicePixelRatio(self.device_pixel_ratio) |
| | painter = QtGui.QPainter(self) |
| | painter.eraseRect(event.rect()) |
| | painter.drawImage(0, 0, qimage) |
| | self._draw_rect_callback(painter) |
| | painter.end() |
| |
|
| |
|
| | @_BackendQT.export |
| | class _BackendQTCairo(_BackendQT): |
| | FigureCanvas = FigureCanvasQTCairo |
| |
|
