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mapToPosition

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Irony 2017-12-25 01:07:21 +08:00
parent 363483b704
commit be34b6df04
1 changed files with 4 additions and 7 deletions
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11
QGraphicsView练习/QChartToolTipTest.py
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@ -13,7 +13,7 @@ import random
import sys
from PyQt5.QtChart import QChartView, QChart, QLineSeries
from PyQt5.QtCore import Qt, QRectF, QPoint
from PyQt5.QtCore import Qt, QRectF, QPoint, QPointF
from PyQt5.QtGui import QPainter, QCursor
from PyQt5.QtWidgets import QApplication, QGraphicsProxyWidget, QLabel, \
QWidget, QHBoxLayout, QVBoxLayout, QToolTip, QGraphicsLineItem
@ -162,23 +162,20 @@ class ChartView(QChartView):
self.lineItem.setZValue(998)
self.lineItem.hide()
axisX, axisY = self._chart.axisX(), self._chart.axisY()
min_x, max_x = axisX.min(), axisX.max()
min_y, max_y = axisY.min(), axisY.max()
print(min_x, max_x, min_y, max_y)
def mouseMoveEvent(self, event):
super(ChartView, self).mouseMoveEvent(event)
# 获取x和y轴的最小最大值
axisX, axisY = self._chart.axisX(), self._chart.axisY()
min_x, max_x = axisX.min(), axisX.max()
min_y, max_y = axisY.min(), axisY.max()
print(self._chart.mapToPosition(QPointF(0,0)))
print(self._chart.mapToPosition(QPointF(0,max_y)))
step_x = (max_x - min_x) / (axisX.tickCount() - 1)
step_y = (max_y - min_y) / (axisY.tickCount() - 1)
# 把鼠标位置所在点转换为对应的xy值
x = self._chart.mapToValue(event.pos()).x()
y = self._chart.mapToValue(event.pos()).y()
print(x, y, step_x, step_y, event.pos())
# print(x, y, step_x, step_y, event.pos())
r_x = x / step_x
r_y = y / step_y # @UnusedVariable
index = round(r_x) - 1 # 四舍五入