rework settings, add pyqtUsrObj.py

pyqtUsrObj.py

@@ -0,0 +1,135 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+"""
+Demonstrates a variety of uses for ROI. This class provides a user-adjustable
+region of interest marker. It is possible to customize the layout and
+function of the scale/rotate handles in very flexible ways.
+"""
+
+#import initExample  ## Add path to library (just for examples; you do not need this)
+
+import pyqtgraph as pg
+from pyqtgraph.Qt import QtCore, QtGui
+import numpy as np
+
+
+class BeamMark(pg.ROI):
+  """A crosshair ROI whose position is at the center of the crosshairs. By default, it is scalable, rotatable and translatable."""
+
+  def __init__(self, pos=None, size=None, parent=None, **kargs):
+    #self._size=size
+    #self._pos=pos
+    #self._shape=None
+    pg.ROI.__init__(self, pos, size, **kargs)
+
+  def paint(self, p, *args):
+    #pg.ROI.paint(self, p, *args)
+    r=QtCore.QRectF(0, 0, self.state['size'][0], self.state['size'][1]).normalized()
+    p.setRenderHint(QtGui.QPainter.Antialiasing)
+    p.setPen(self.currentPen)
+    p.translate(r.left(), r.top())
+    p.scale(r.width(), r.height())
+    p.drawEllipse(0, 0, 1, 1)
+    p.drawRect(0, 0, 1, 1)
+    p.setPen(pg.mkPen(width=3, color=[200, 100, 100]))
+    p.drawLine(pg.Point(.5, 0), pg.Point(.5, 1))
+    p.drawLine(pg.Point( 0,.5), pg.Point( 1,.5))
+    #w, h = self.getState()["size"]
+    #v1, v2 = -(h * 0.8) / 2, (h * 0.8) / 2
+    #h1, h2 = -(w * 0.8) / 2, (w * 0.8) / 2
+    #p.setRenderHint(QtGui.QPainter.Antialiasing)
+    #p.setPen(pg.mkPen(width=3, color=[200, 100, 100]))
+    #p.drawLine(pg.Point(0, v1), pg.Point(0, v2))
+    #p.drawLine(pg.Point(h1, 0), pg.Point(h2, 0))
+    #p.setPen(self.currentPen)
+    ##p.setPen(pg.mkPen(width=3, color=[200, 200, 100]))
+    #p.drawRect(-w / 2, -h / 2, w, h)
+    ## p.drawText(-w, -h, '{:.0f}x{:.0f}'.format(*self._size))
+
+
+
+## Start Qt event loop unless running in interactive mode or using pyside.
+if __name__=='__main__':
+  import sys
+  import argparse
+
+  #(h, t)=os.path.split(sys.argv[0]);cmd='\n  '+(t if len(h)>20 else sys.argv[0])+' '
+  #exampleCmd=('', '-m0xf -v0')
+  epilog=__doc__ #+'\nExamples:'+''.join(map(lambda s:cmd+s, exampleCmd))+'\n'
+  parser=argparse.ArgumentParser(epilog=epilog, formatter_class=argparse.RawDescriptionHelpFormatter)
+  parser.add_argument("--mode", "-m", type=lambda x: int(x,0), help="mode default=0x%(default)x", default=0)
+  args = parser.parse_args()
+
+  pg.setConfigOptions(imageAxisOrder='row-major')
+
+
+  def obj_info(obj):
+    pos=obj.pos()
+    scnPos=obj.scenePos()
+    t=obj.transform()
+    obj_info
+    print(f"obj_info:{obj}")
+    print(f"Pos:({pos.x():.6g},{pos.y():.6g})")            #in coordinate value on the scene (no change by zooming)
+    print(f"scenePos:({scnPos.x():.6g},{scnPos.y():.6g})") #in pixel on the scene (changes by zooming)
+    print(f"QTransform:{t.m11():8.5g} {t.m12():8.5g} {t.m13():8.5g}")
+    print(f"           {t.m21():8.5g} {t.m22():8.5g} {t.m23():8.5g}")
+    print(f"           {t.m31():8.5g} {t.m32():8.5g} {t.m33():8.5g}")
+
+
+  def pt2str(p):
+    return (f'({p.x():.5g},{p.y():.5g})')
+
+  def childTree(obj, lvl=0):
+    print('+'*lvl+str(obj))
+    for child in obj.childItems():
+      childTree(child, lvl+1)
+
+  def mouse_click_event(event):
+    pos=event.pos()
+    scn=event.scenePos()  # there is a small black border, that makes the difference
+    img=viImg.mapFromScene(scn)
+    roi=viUsrRoi.mapFromScene(scn)
+    print(f'mouse:{pt2str(pos)} {pt2str(scn)} img:{pt2str(img)}  roi:{pt2str(roi)}')
+    #childTree(vb)
+    obj_info(viUsrRoi)
+
+  ## Create image to display
+  arr=np.ones((100, 100), dtype=float)
+  arr[45:55, 45:55]=0
+  arr[25, :]=5
+  arr[:, 25]=5
+  arr[75, :]=5
+  arr[:, 75]=5
+  arr[50, :]=10
+  arr[:, 50]=10
+  arr+=np.sin(np.linspace(0, 20, 100)).reshape(1, 100)
+  arr+=np.random.normal(size=(100, 100))
+
+  # add an arrow for asymmetry
+  arr[10, :50]=10
+  arr[9:12, 44:48]=10
+  arr[8:13, 44:46]=10
+
+  ## create GUI
+  app=QtGui.QApplication([])
+  w=pg.GraphicsLayoutWidget(show=True, size=(1000, 800), border=True)
+  w.setWindowTitle('pyqtgraph example: ROI Examples')
+
+  vb=w.addViewBox(row=1, col=0, lockAspect=True)
+  g=pg.GridItem()
+  vb.addItem(g)
+
+  viImg=pg.ImageItem(arr, border='y')
+  vb.addItem(viImg)
+  # Custom ROI for selecting an image region
+  viRoi=pg.ROI([20, 50], [100, 70])
+  vb.addItem(viRoi)
+  viUsrRoi=BeamMark([10, 20], [30, 20])
+  vb.addItem(viUsrRoi)
+  childTree(vb)
+
+  w.scene().sigMouseClicked.connect(mouse_click_event)
+
+  if (sys.flags.interactive!=1) or not hasattr(QtCore, 'PYQT_VERSION'):
+    QtGui.QApplication.instance().exec_()
+