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"""
Simple examples demonstrating the use of GLTextItem.
"""
import pyqtgraph as pg
import pyqtgraph.opengl as gl
from pyqtgraph.Qt import mkQApp, QtCore
def add_origin(view_widget, loc, length=0.5, color='y', width=1):
pos = [
[loc[0], loc[1], loc[2]],
[loc[0] + length, loc[1], loc[2]],
[loc[0], loc[1], loc[2]],
[loc[0], loc[1] + length, loc[2]],
[loc[0], loc[1], loc[2]],
[loc[0], loc[1], loc[2] + length],
]
line = gl.GLLinePlotItem(
pos=pos,
color=pg.mkColor(color),
width=width,
mode='lines',
antialias=True
)
view_widget.addItem(line)
def add_origin_text(view_widget, pos, alignment, text):
txt_item = gl.GLTextItem()
txt_item.setData(
pos=pos,
color=(127, 255, 127, 255),
text=text,
alignment=alignment
)
view_widget.addItem(txt_item)
add_origin(view_widget, loc=pos)
app = mkQApp("GLTextItem Example")
gvw = gl.GLViewWidget()
gvw.show()
gvw.setWindowTitle('pyqtgraph example: GLTextItem')
griditem = gl.GLGridItem()
griditem.setSize(10, 10)
griditem.setSpacing(1, 1)
gvw.addItem(griditem)
axisitem = gl.GLAxisItem()
gvw.addItem(axisitem)
txtitem1 = gl.GLTextItem(pos=(0.0, 0.0, 0.0), text='text1')
gvw.addItem(txtitem1)
txtitem2 = gl.GLTextItem(pos=(1.0, -1.0, 2.0), color=(127, 255, 127, 255), text='text2')
gvw.addItem(txtitem2)
af = QtCore.Qt.AlignmentFlag
add_origin_text(gvw, (-3.0, 2.0, 0.0), af.AlignLeft | af.AlignBottom, 'LB')
add_origin_text(gvw, (-1.0, 2.0, 0.0), af.AlignLeft | af.AlignTop, 'LT')
add_origin_text(gvw, (+1.0, 2.0, 0.0), af.AlignRight | af.AlignBottom, 'RB')
add_origin_text(gvw, (+3.0, 2.0, 0.0), af.AlignRight | af.AlignTop, 'RT')
add_origin_text(gvw, (-3.0, -2.0, 0.0), af.AlignHCenter | af.AlignBottom, 'CB')
add_origin_text(gvw, (-1.0, -2.0, 0.0), af.AlignHCenter | af.AlignTop, 'CT')
add_origin_text(gvw, (+1.0, -2.0, 0.0), af.AlignLeft | af.AlignVCenter, 'LC')
add_origin_text(gvw, (+3.0, -2.0, 0.0), af.AlignRight | af.AlignVCenter, 'RC')
add_origin_text(gvw, (2.0, +0.0, 0.0), af.AlignHCenter | af.AlignVCenter, 'CC')
if __name__ == '__main__':
pg.exec()
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