143 lines
5.1 KiB
Python
143 lines
5.1 KiB
Python
from ..Qt import QtGui, QtCore
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from .. import functions as fn
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from .GraphicsWidget import GraphicsWidget
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from .GraphicsWidgetAnchor import GraphicsWidgetAnchor
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from .. import getConfigOption
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__all__ = ['LabelItem']
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class LabelItem(GraphicsWidget, GraphicsWidgetAnchor):
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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 TextItem
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"""
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def __init__(self, text=' ', parent=None, angle=0, **args):
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GraphicsWidget.__init__(self, parent)
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GraphicsWidgetAnchor.__init__(self)
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self.item = QtGui.QGraphicsTextItem(self)
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self.opts = {
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'color': None,
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'justify': 'center'
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}
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self.opts.update(args)
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self._sizeHint = {}
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self.setText(text)
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self.setAngle(angle)
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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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==================== ==============================
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**Style Arguments:**
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color (str) example: '#CCFF00'
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size (str) example: '8pt'
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bold (bool)
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italic (bool)
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==================== ==============================
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"""
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self.text = text
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opts = self.opts
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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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color = self.opts['color']
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if color is None:
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color = getConfigOption('foreground')
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color = fn.mkColor(color)
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optlist.append('color: ' + color.name())
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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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self.resizeEvent(None)
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self.updateGeometry()
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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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self.item.setPos(0,0)
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bounds = self.itemRect()
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left = self.mapFromItem(self.item, QtCore.QPointF(0,0)) - self.mapFromItem(self.item, QtCore.QPointF(1,0))
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rect = self.rect()
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if self.opts['justify'] == 'left':
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if left.x() != 0:
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bounds.moveLeft(rect.left())
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if left.y() < 0:
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bounds.moveTop(rect.top())
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elif left.y() > 0:
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bounds.moveBottom(rect.bottom())
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elif self.opts['justify'] == 'center':
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bounds.moveCenter(rect.center())
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#bounds = self.itemRect()
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#self.item.setPos(self.width()/2. - bounds.width()/2., 0)
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elif self.opts['justify'] == 'right':
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if left.x() != 0:
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bounds.moveRight(rect.right())
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if left.y() < 0:
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bounds.moveBottom(rect.bottom())
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elif left.y() > 0:
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bounds.moveTop(rect.top())
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#bounds = self.itemRect()
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#self.item.setPos(self.width() - bounds.width(), 0)
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self.item.setPos(bounds.topLeft() - self.itemRect().topLeft())
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self.updateMin()
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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.setRotation(angle)
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self.updateMin()
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def updateMin(self):
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bounds = self.itemRect()
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self.setMinimumWidth(bounds.width())
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self.setMinimumHeight(bounds.height())
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self._sizeHint = {
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QtCore.Qt.SizeHint.MinimumSize: (bounds.width(), bounds.height()),
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QtCore.Qt.SizeHint.PreferredSize: (bounds.width(), bounds.height()),
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QtCore.Qt.SizeHint.MaximumSize: (-1, -1), #bounds.width()*2, bounds.height()*2),
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QtCore.Qt.SizeHint.MinimumDescent: (0, 0) ##?? what is this?
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}
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self.updateGeometry()
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def sizeHint(self, hint, constraint):
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if hint not in self._sizeHint:
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return QtCore.QSizeF(0, 0)
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return QtCore.QSizeF(*self._sizeHint[hint])
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def itemRect(self):
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return self.item.mapRectToParent(self.item.boundingRect())
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#def paint(self, p, *args):
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#p.setPen(fn.mkPen('r'))
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#p.drawRect(self.rect())
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#p.setPen(fn.mkPen('g'))
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#p.drawRect(self.itemRect())
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