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| 2 | |
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| 3 | from PyQt4.QtGui import QGraphicsItem, QGraphicsTextItem, QGraphicsRectItem, QColor |
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| 4 | from PyQt4.QtCore import QPointF, QRectF, Qt |
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| 5 | |
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| 6 | from owpoint import * |
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| 7 | from owcurve import * |
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| 8 | |
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| 9 | PointColor = 1 |
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| 10 | PointSize = 2 |
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| 11 | PointSymbol = 4 |
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| 12 | |
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| 13 | class OWLegend(QGraphicsItem): |
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| 14 | def __init__(self, scene): |
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| 15 | QGraphicsItemGroup.__init__(self, None, scene) |
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| 16 | self.curves = [] |
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| 17 | self.items = [] |
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| 18 | self.attributes = [] |
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| 19 | self.point_attrs = {} |
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| 20 | self.point_vals = {} |
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| 21 | self.default_values = { |
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| 22 | PointColor : Qt.black, |
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| 23 | PointSize : 8, |
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| 24 | PointSymbol : OWPoint.Ellipse |
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| 25 | } |
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| 26 | self.box_rect = QRectF() |
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| 27 | self.setFiltersChildEvents(True) |
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| 28 | |
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| 29 | def clear(self): |
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| 30 | self.curves = [] |
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| 31 | self.point_attrs = {} |
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| 32 | self.point_vals = {} |
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| 33 | self.update() |
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| 34 | |
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| 35 | |
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| 36 | def add_curve(self, curve, attributes = []): |
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| 37 | for point_attribute, data_attribute, value in attributes: |
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| 38 | if point_attribute not in self.point_attrs: |
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| 39 | self.point_attrs[point_attribute] = data_attribute |
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| 40 | |
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| 41 | if point_attribute == PointColor: |
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| 42 | point_val = curve.color() |
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| 43 | elif point_attribute == PointSize: |
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| 44 | point_val = curve.pointSize() |
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| 45 | else: |
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| 46 | point_val = curve.symbol() |
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| 47 | |
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| 48 | if not point_attribute in self.point_vals: |
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| 49 | self.point_vals[point_attribute] = {} |
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| 50 | self.point_vals[point_attribute][point_val] = value |
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| 51 | self.curves.append(curve) |
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| 52 | self.update() |
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| 53 | |
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| 54 | def update(self): |
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| 55 | for i in self.items: |
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| 56 | self.scene().removeItem(i) |
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| 57 | del self.items[:] |
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| 58 | y = 10 |
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| 59 | length = 0 |
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| 60 | if self.point_attrs: |
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| 61 | ## Using the owplot API to specify paremeters |
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| 62 | ## NOTE: The API is neither finished nor used |
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| 63 | for p_a, d_a in self.point_attrs.iteritems(): |
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| 64 | ## We construct a separate box for each attribute |
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| 65 | title_item = QGraphicsTextItem( d_a, self ) |
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| 66 | title_item.setPos(QPointF(10, y-10)) |
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| 67 | self.items.append(title_item) |
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| 68 | y = y + 20 |
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| 69 | for p_v, d_v in self.point_vals[p_a].iteritems(): |
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| 70 | color = p_v if p_a == PointColor else self.default_values[PointColor] |
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| 71 | symbol = p_v if p_a == PointSymbol else self.default_values[PointSymbol] |
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| 72 | size = p_v if p_a == PointSize else self.default_values[PointSize] |
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| 73 | self.items.append( point_item(10, y, color, symbol, size, self) ) |
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| 74 | text = QGraphicsTextItem(d_v, self) |
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| 75 | text.setPos(QPointF(20, y-10)) |
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| 76 | self.items.append(text) |
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| 77 | y = y + 20 |
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| 78 | y = y + 10 |
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| 79 | else: |
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| 80 | for curve in self.curves: |
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| 81 | self.items.append(curve.pointItem(10, y, curve.pointSize(), self)) |
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| 82 | text = QGraphicsTextItem(curve.name, self) |
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| 83 | length = max(length, text.boundingRect().width()) |
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| 84 | text.setPos(QPointF(20, y-10)) |
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| 85 | self.items.append(text) |
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| 86 | y = y + 20 |
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| 87 | if self.curves: |
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| 88 | self.box_rect = QRectF(0, 0, 20 + length, y-10) |
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| 89 | box_item = QGraphicsRectItem(self.box_rect, self) |
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| 90 | box_item.setBrush(Qt.white) |
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| 91 | box_item.setZValue(-1) |
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| 92 | self.items.append(box_item) |
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| 93 | else: |
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| 94 | box_rect = QRectF() |
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| 95 | |
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| 96 | def mouseMoveEvent(self, event): |
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| 97 | self.setPos(self.pos() + event.scenePos() - event.lastScenePos()) |
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| 98 | event.accept() |
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| 99 | |
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| 100 | def mousePressEvent(self, event): |
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| 101 | event.accept() |
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| 102 | |
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| 103 | def boundingRect(self): |
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| 104 | return self.box_rect |
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| 105 | |
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| 106 | def paint(self, painter, option, widget=None): |
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| 107 | pass |
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| 108 | |
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