92 lines
3.2 KiB
Python
92 lines
3.2 KiB
Python
from pyqtgraph.Qt import QtGui, QtCore
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import pyqtgraph.functions as fn
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from GraphicsWidget import GraphicsWidget
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__all__ = ['LabelItem']
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class LabelItem(GraphicsWidget):
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"""
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GraphicsWidget displaying text.
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Used mainly as axis labels, titles, etc.
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Note: To display text inside a scaled view (ViewBox, PlotWidget, etc) use QGraphicsTextItem
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with the flag ItemIgnoresTransformations set.
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"""
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def __init__(self, text, parent=None, **args):
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GraphicsWidget.__init__(self, parent)
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self.item = QtGui.QGraphicsTextItem(self)
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self.opts = args
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if 'color' not in args:
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self.opts['color'] = 'CCC'
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else:
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if isinstance(args['color'], QtGui.QColor):
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self.opts['color'] = fn.colorStr(args['color'])[:6]
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self.sizeHint = {}
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self.setText(text)
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def setAttr(self, attr, value):
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"""Set default text properties. See setText() for accepted parameters."""
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self.opts[attr] = value
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def setText(self, text, **args):
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"""Set the text and text properties in the label. Accepts optional arguments for auto-generating
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a CSS style string:
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color: string (example: 'CCFF00')
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size: string (example: '8pt')
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bold: boolean
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italic: boolean
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"""
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self.text = text
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opts = self.opts.copy()
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for k in args:
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opts[k] = args[k]
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optlist = []
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if 'color' in opts:
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optlist.append('color: #' + opts['color'])
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if 'size' in opts:
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optlist.append('font-size: ' + opts['size'])
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if 'bold' in opts and opts['bold'] in [True, False]:
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optlist.append('font-weight: ' + {True:'bold', False:'normal'}[opts['bold']])
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if 'italic' in opts and opts['italic'] in [True, False]:
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optlist.append('font-style: ' + {True:'italic', False:'normal'}[opts['italic']])
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full = "<span style='%s'>%s</span>" % ('; '.join(optlist), text)
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#print full
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self.item.setHtml(full)
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self.updateMin()
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def resizeEvent(self, ev):
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c1 = self.boundingRect().center()
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c2 = self.item.mapToParent(self.item.boundingRect().center()) # + self.item.pos()
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dif = c1 - c2
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self.item.moveBy(dif.x(), dif.y())
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#print c1, c2, dif, self.item.pos()
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def setAngle(self, angle):
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self.angle = angle
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self.item.resetTransform()
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self.item.rotate(angle)
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self.updateMin()
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def updateMin(self):
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bounds = self.item.mapRectToParent(self.item.boundingRect())
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self.setMinimumWidth(bounds.width())
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self.setMinimumHeight(bounds.height())
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#print self.text, bounds.width(), bounds.height()
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#self.sizeHint = {
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#QtCore.Qt.MinimumSize: (bounds.width(), bounds.height()),
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#QtCore.Qt.PreferredSize: (bounds.width(), bounds.height()),
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#QtCore.Qt.MaximumSize: (bounds.width()*2, bounds.height()*2),
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#QtCore.Qt.MinimumDescent: (0, 0) ##?? what is this?
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#}
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#def sizeHint(self, hint, constraint):
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#return self.sizeHint[hint]
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