020b7077cb
* TickSliderItem: allowRemove property added Following #744, this PR suggests the addition of a property `allowRemove` to `TickSliderItem` and therefore also to `GradientEditorItem`. It sets the default of whether ticks can be removed by the user and therefore contemplates `allowAdd`. I would be interested in other opinions on this design decision, as #744 suggests to reuse `allowAdd` for the prohibition of tick removal. I personally suggest this solution, since it does not change the effect of the current API. Fix #744 * customPlot.py: Added markers to example using TickSliderItem * examples\GradientWidget.py: Demonstrate use of allowRemove Co-authored-by: 2xB <2xB@users.noreply.github.com>
59 lines
1.6 KiB
Python
59 lines
1.6 KiB
Python
# -*- coding: utf-8 -*-
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"""
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Demonstrates the appearance / interactivity of GradientWidget
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(without actually doing anything useful with it)
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"""
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import initExample ## Add path to library (just for examples; you do not need this)
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import pyqtgraph as pg
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from pyqtgraph.Qt import QtCore, QtGui
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import numpy as np
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app = QtGui.QApplication([])
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w = QtGui.QMainWindow()
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w.show()
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w.setWindowTitle('pyqtgraph example: GradientWidget')
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w.setGeometry(10, 50, 400, 400)
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cw = QtGui.QWidget()
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w.setCentralWidget(cw)
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l = QtGui.QGridLayout()
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l.setSpacing(0)
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cw.setLayout(l)
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w1 = pg.GradientWidget(orientation='top')
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w2 = pg.GradientWidget(orientation='right', allowAdd=False)
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#w2.setTickColor(1, QtGui.QColor(255,255,255))
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w3 = pg.GradientWidget(orientation='bottom', allowAdd=False, allowRemove=False)
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w4 = pg.GradientWidget(orientation='left')
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w4.loadPreset('spectrum')
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label = QtGui.QLabel("""
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- Click a triangle to change its color
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- Drag triangles to move
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- Right-click a gradient to load triangle presets
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- Click in an empty area to add a new color
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(adding is disabled for the bottom-side and right-side widgets)
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- Right click a triangle to remove
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(only possible if more than two triangles are visible)
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(removing is disabled for the bottom-side widget)
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""")
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l.addWidget(w1, 0, 1)
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l.addWidget(w2, 1, 2)
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l.addWidget(w3, 2, 1)
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l.addWidget(w4, 1, 0)
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l.addWidget(label, 1, 1)
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## Start Qt event loop unless running in interactive mode or using pyside.
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if __name__ == '__main__':
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import sys
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if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
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QtGui.QApplication.instance().exec_()
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