80 lines
2.8 KiB
Python
80 lines
2.8 KiB
Python
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#!/usr/bin/env python
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# encoding: utf-8
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'''
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Created on 2019年5月21日
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@author: weike32
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@site: https://pyqt5.com ,https://github.com/weike32
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@email: 394967319@qq.com
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@file: CopyContent
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@description: 工具类
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'''
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from pyqtgraph.exporters.ImageExporter import ImageExporter, Exporter
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from pyqtgraph.parametertree import Parameter
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import pyqtgraph as pg
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#不用修改源码，重加载，解决右键保存图片异常
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def widthChanged(self):
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sr = self.getSourceRect()
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ar = float(sr.height()) / sr.width()
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self.params.param('height').setValue(int(self.params['width'] * ar), blockSignal=self.heightChanged)
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def heightChanged(self):
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sr = self.getSourceRect()
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ar = float(sr.width()) / sr.height()
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self.params.param('width').setValue(int(self.params['height'] * ar), blockSignal=self.widthChanged)
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def New__init__(self, item):
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Exporter.__init__(self, item)
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tr = self.getTargetRect()
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if isinstance(item, pg.Qt.QtGui.QGraphicsItem):
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scene = item.scene()
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else:
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scene = item
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bgbrush = scene.views()[0].backgroundBrush()
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bg = bgbrush.color()
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if bgbrush.style() == pg.Qt.QtCore.Qt.NoBrush:
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bg.setAlpha(0)
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self.params = Parameter(name='params', type='group', children=[
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{'name': 'width', 'type': 'int', 'value': int(tr.width()), 'limits': (0, None)},
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{'name': 'height', 'type': 'int', 'value': int(tr.height()), 'limits': (0, None)},
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{'name': 'antialias', 'type': 'bool', 'value': True},
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{'name': 'background', 'type': 'color', 'value': bg},
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])
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self.params.param('width').sigValueChanged.connect(self.widthChanged)
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self.params.param('height').sigValueChanged.connect(self.heightChanged)
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ImageExporter.heightChanged = heightChanged
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ImageExporter.widthChanged = widthChanged
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ImageExporter.__init__ = New__init__
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#解决自定义坐标轴密集显示
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class MyStringAxis(pg.AxisItem):
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def __init__(self, xdict, *args, **kwargs):
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pg.AxisItem.__init__(self, *args, **kwargs)
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self.xdict = xdict
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def tickStrings(self, values, scale, spacing):
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strings = []
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for v in values:
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vs = v * scale
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if vs in self.xdict.keys():
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vstr = self.xdict[vs]
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else:
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vstr = ""
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strings.append(vstr)
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return strings
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# 禁止鼠标事件
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class CustomViewBox(pg.ViewBox):
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def __init__(self, *args, **kwds):
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pg.ViewBox.__init__(self, *args, **kwds)
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self.RectMode = 3
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self.setMouseMode(self.RectMode)
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def mouseClickEvent(self, ev):
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if ev.button() == pg.QtCore.Qt.RightButton:
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self.autoRange()
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def mouseDragEvent(self, ev):
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pg.ViewBox.mouseDragEvent(self, ev)
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def wheelEvent(self,ev, axis=None):
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pg.ViewBox.wheelEvent(self, ev, axis)
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