python 导航栏_python 导航栏
# -*- coding: utf-8 -*-#
#-------------------------------------------------------------------------------
# Name: 导航条控件
#-------------------------------------------------------------------------------
import sys
from PyQt4.QtGui import *
from PyQt4.QtCore import *
class NavigationWidget(QWidget):
currentItemChanged = pyqtSignal([int, str])
def __init__(self, parent=None):
super(NavigationWidget, self).__init__(parent)
self.initUI()
def initUI(self):
self.backgroundColor = '#E4E4E4'
self.selectedColor = '#2CA7F8'
self.rowHeight = 40
self.currentIndex = 0 #当前选择的项索引
self.listItems = []
self.cursorIndex = -1 #当前光标所在位置的项索引
self.setMouseTracking(True)
self.setMinimumWidth(120)
def addItem(self, item):
self.listItems.append(item)
self.update()
def setItems(self, items):
self.listItems = items
self.update()
def setBackgroundColor(self, color):
self.backgroundColor = color
self.update()
def setSelectColor(self, color):
self.selectedColor = color
self.update()
def setRowHeight(self, height):
self.rowHeight = height
self.update()
def setCurrentIndex(self, idx):
self.currentIndex = idx
self.currentItemChanged.emit(idx, self.listItems[idx])
self.update()
def paintEvent(self, evt):
painter = QPainter(self)
painter.setRenderHint(QPainter.Antialiasing, True)
#画背景色
painter.setPen(Qt.NoPen)
painter.setBrush(QColor(self.backgroundColor))
painter.drawRect(self.rect())
#画子项
for i in range(len(self.listItems)):
itemPath = QPainterPath()
itemPath.addRect(QRectF(0, i*self.rowHeight, self.width()-1, self.rowHeight-1))
if i == self.currentIndex:
painter.setPen(QColor('#FFFFFF'))
painter.fillPath(itemPath, QColor(self.selectedColor))
elif i == self.cursorIndex:
painter.setPen(QColor('#FFFFFF'))
painter.fillPath(itemPath, QColor(self.selectedColor))
else:
painter.setPen(QColor('#202020'))
painter.fillPath(itemPath, QColor(self.backgroundColor))
painter.drawText(QRect(0, i*self.rowHeight, self.width(), self.rowHeight), Qt.AlignVCenter|Qt.AlignHCenter, self.listItems[i])
def mouseMoveEvent(self, evt):
idx = evt.y() / self.rowHeight
if idx >= len(self.listItems):
idx = -1
if idx < len(self.listItems) and idx != self.cursorIndex:
self.update()
self.cursorIndex = idx
def mousePressEvent(self, evt):
idx = evt.y()/self.rowHeight
if idx< len(self.listItems):
self.currentIndex = idx
self.currentItemChanged.emit(idx, self.listItems[idx])
self.update()
def leaveEvent(self, QEvent):
self.cursorIndex = -1
self.update()
class MainWindow(QMainWindow):
def __init__(self):
super(MainWindow, self).__init__()
self.initUI()
def initUI(self):
self.resize(600, 400)
self.setWindowTitle(u'导航条控件')
mainWidget = QWidget()
self.setCentralWidget(mainWidget)
navigationWidget = NavigationWidget()
navigationWidget.setRowHeight(50)
navigationWidget.setItems([u'常规', u'高级', u'管理', u'其它', u'关于'])
self.tipsLabel = QLabel(u"请选择：")
mainLayout = QHBoxLayout(mainWidget)
mainLayout.setContentsMargins(0, 0, 0, 0)
mainLayout.setSpacing(10)
mainLayout.addWidget(navigationWidget, 1)
mainLayout.addWidget(self.tipsLabel, 3, Qt.AlignCenter)
navigationWidget.currentItemChanged[int, str].connect(self.slotCurrentItemChanged)
navigationWidget.setCurrentIndex(2)
self.show()
def slotCurrentItemChanged(self, index, content):
self.tipsLabel.setText(u"Current index and content：{} ---- {}".format(index, content))
def main():
app = QApplication(sys.argv)
mainWnd = MainWindow()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
