124 lines
4.8 KiB
Python
124 lines
4.8 KiB
Python
from ..Qt import QtCore, QtGui
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from ..Point import Point
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from .UIGraphicsItem import *
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from .. import functions as fn
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class TextItem(UIGraphicsItem):
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"""
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GraphicsItem displaying unscaled text (the text will always appear normal even inside a scaled ViewBox).
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"""
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def __init__(self, text='', color=(200,200,200), html=None, anchor=(0,0), border=None, fill=None, angle=0):
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"""
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=========== =================================================================================
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Arguments:
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*text* The text to display
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*color* The color of the text (any format accepted by pg.mkColor)
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*html* If specified, this overrides both *text* and *color*
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*anchor* A QPointF or (x,y) sequence indicating what region of the text box will
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be anchored to the item's position. A value of (0,0) sets the upper-left corner
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of the text box to be at the position specified by setPos(), while a value of (1,1)
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sets the lower-right corner.
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*border* A pen to use when drawing the border
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*fill* A brush to use when filling within the border
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=========== =================================================================================
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"""
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## not working yet
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#*angle* Angle in degrees to rotate text (note that the rotation assigned in this item's
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#transformation will be ignored)
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self.anchor = Point(anchor)
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#self.angle = 0
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UIGraphicsItem.__init__(self)
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self.textItem = QtGui.QGraphicsTextItem()
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self.textItem.setParentItem(self)
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self.lastTransform = None
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self._bounds = QtCore.QRectF()
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if html is None:
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self.setText(text, color)
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else:
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self.setHtml(html)
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self.fill = fn.mkBrush(fill)
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self.border = fn.mkPen(border)
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self.rotate(angle)
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self.setFlag(self.ItemIgnoresTransformations) ## This is required to keep the text unscaled inside the viewport
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def setText(self, text, color=(200,200,200)):
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color = fn.mkColor(color)
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self.textItem.setDefaultTextColor(color)
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self.textItem.setPlainText(text)
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self.updateText()
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#html = '<span style="color: #%s; text-align: center;">%s</span>' % (color, text)
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#self.setHtml(html)
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def updateAnchor(self):
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pass
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#self.resetTransform()
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#self.translate(0, 20)
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def setPlainText(self, *args):
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self.textItem.setPlainText(*args)
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self.updateText()
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def setHtml(self, *args):
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self.textItem.setHtml(*args)
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self.updateText()
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def setTextWidth(self, *args):
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self.textItem.setTextWidth(*args)
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self.updateText()
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def setFont(self, *args):
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self.textItem.setFont(*args)
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self.updateText()
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#def setAngle(self, angle):
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#self.angle = angle
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#self.updateText()
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def updateText(self):
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## Needed to maintain font size when rendering to image with increased resolution
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self.textItem.resetTransform()
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#self.textItem.rotate(self.angle)
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if self._exportOpts is not False and 'resolutionScale' in self._exportOpts:
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s = self._exportOpts['resolutionScale']
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self.textItem.scale(s, s)
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#br = self.textItem.mapRectToParent(self.textItem.boundingRect())
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self.textItem.setPos(0,0)
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br = self.textItem.boundingRect()
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apos = self.textItem.mapToParent(Point(br.width()*self.anchor.x(), br.height()*self.anchor.y()))
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#print br, apos
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self.textItem.setPos(-apos.x(), -apos.y())
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#def textBoundingRect(self):
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### return the bounds of the text box in device coordinates
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#pos = self.mapToDevice(QtCore.QPointF(0,0))
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#if pos is None:
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#return None
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#tbr = self.textItem.boundingRect()
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#return QtCore.QRectF(pos.x() - tbr.width()*self.anchor.x(), pos.y() - tbr.height()*self.anchor.y(), tbr.width(), tbr.height())
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def viewRangeChanged(self):
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self.updateText()
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def boundingRect(self):
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return self.textItem.mapToParent(self.textItem.boundingRect()).boundingRect()
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def paint(self, p, *args):
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tr = p.transform()
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if self.lastTransform is not None:
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if tr != self.lastTransform:
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self.viewRangeChanged()
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self.lastTransform = tr
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if self.border.style() != QtCore.Qt.NoPen or self.fill.style() != QtCore.Qt.NoBrush:
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p.setPen(self.border)
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p.setBrush(self.fill)
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p.setRenderHint(p.Antialiasing, True)
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p.drawPolygon(self.textItem.mapToParent(self.textItem.boundingRect()))
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