本文介绍了在视图中适合 QGraphisItem的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
是一种适合任何图像(我在 QPixmap 中导入)并保持纵横比的方法>.我尝试了很多解决方案,但没有一个.另外我不确定我需要适合什么?QGraphicsView 中的 QGraphicsScene?还是 QGraphicsView 中的 QPixmap?
Is a method to fit any image in view (that I import in QPixmap) and keep aspect ratio>. I try many solution but non of those works. Also I don't not sure what I need to fit? QGraphicsScene in QGraphicsView? Or QPixmap in QGraphicsView?
from PyQt5 import QtCore, QtGui, QtWidgets
class GraphicsView(QtWidgets.QGraphicsView):
def __init__(self, parent=None):
super(GraphicsView, self).__init__(parent)
scene = QtWidgets.QGraphicsScene()
self.setScene(scene)
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
w = GraphicsView()
photo = QtGui.QPixmap("image.jpg")
w.scene().addPixmap(photo)
w.resize(640, 480)
w.show()
sys.exit(app.exec_())
推荐答案
你必须在QGraphicsView的resizeEvent()
方法中使用QGraphicsView的fitInView()
方法:
You have to use the fitInView()
method of QGraphicsView in the resizeEvent()
method of QGraphicsView:
from PyQt5 import QtCore, QtGui, QtWidgets
class GraphicsView(QtWidgets.QGraphicsView):
def __init__(self, parent=None):
super(GraphicsView, self).__init__(parent)
scene = QtWidgets.QGraphicsScene(self)
self.setScene(scene)
self.m_pixmap_item = self.scene().addPixmap(QtGui.QPixmap())
def setPixmap(self, pixmap):
self.m_pixmap_item.setPixmap(pixmap)
def resizeEvent(self, event):
if not self.m_pixmap_item.pixmap().isNull():
self.fitInView(self.m_pixmap_item, QtCore.Qt.KeepAspectRatio)
super(GraphicsView, self).resizeEvent(event)
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
w = GraphicsView()
photo = QtGui.QPixmap("image.jpg")
w.setPixmap(photo)
w.resize(640, 480)
w.show()
sys.exit(app.exec_())
这篇关于在视图中适合 QGraphisItem的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!