Python 如何使用QThread从慢速Sql语句填充自定义QTableWidget?
在本例中,我尝试填充一个QtableWidget,该QtableWidget被修改为使用TableWidgetImage类加载图像Python 如何使用QThread从慢速Sql语句填充自定义QTableWidget?,python,pyqt4,qthread,qtablewidget,Python,Pyqt4,Qthread,Qtablewidget,在本例中,我尝试填充一个QtableWidget,该QtableWidget被修改为使用TableWidgetImage类加载图像 from PyQt4 import QtGui import sys class ImageWidget(QtGui.QWidget): def __init__(self, imagePath, parent): super(ImageWidget, self).__init__(parent) self.picture =
from PyQt4 import QtGui
import sys
class ImageWidget(QtGui.QWidget):
def __init__(self, imagePath, parent):
super(ImageWidget, self).__init__(parent)
self.picture = QtGui.QPixmap(imagePath)
def paintEvent(self, event):
painter = QtGui.QPainter(self)
painter.drawPixmap(0, 0, self.picture)
class TableWidgetImage(QtGui.QTableWidget):
def setImage(self, row, col, imagePath):
image = ImageWidget(imagePath, self)
self.setCellWidget(row, col, image)
功能是:我从“cbUser”(帐户)中选择一个项目,然后按“btnCargar”,然后“tableusamigos”加载ok。我的问题将在下一步集中讨论。当我在一行中双击“tableusamigos”时,它应该加载第二个QTableWidget。它起作用了。但我的问题是当有很多行的时候。我想使用QThread加载。我不知道如何使用QThread修改UI QTableWidget控件。这是我的另一个Python文件,它包含两个类:
class Ui_friendForm(QMdiSubWindow):
def __init__(self):
QtGui.QMdiSubWindow.__init__(self)
icon = QtGui.QIcon()
icon.addPixmap(QtGui.QPixmap(_fromUtf8(":/mmAmistad/mmAmistad.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
self.setWindowIcon(icon)
self.resize(878, 637)
self.cbUser = QtGui.QComboBox(self)
self.cbUser.setGeometry(QtCore.QRect(20, 70, 211, 22))
self.cbUser.setObjectName(_fromUtf8("cbUser"))
self.btnCargar = QtGui.QPushButton(self)
self.btnCargar.setGeometry(QtCore.QRect(250, 60, 91, 41))
icon = QtGui.QIcon()
icon.addPixmap(QtGui.QPixmap(_fromUtf8(":/picLoad/btnLoad.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
self.btnCargar.setIcon(icon)
self.btnCargar.setObjectName(_fromUtf8("btnCargar"))
self.tableSusAmigos = TableWidgetImage(self)
self.tableSusAmigos.setGeometry(QtCore.QRect(20, 110, 391, 461))
self.tableSusAmigos.setColumnCount(3)
self.tableSusAmigos.setObjectName(_fromUtf8("tableSusAmigos"))
self.tableSusAmigos.setRowCount(0)
self.tableSusAmigos.verticalHeader().setDefaultSectionSize(50)
self.tableSusAmigos.setSelectionBehavior(QtGui.QAbstractItemView.SelectRows)
self.tableSusAmigos.setEditTriggers(QtGui.QAbstractItemView.NoEditTriggers)
self.tableSusAmigos.setSortingEnabled(1)
item = QtGui.QTableWidgetItem()
self.tableSusAmigos.setHorizontalHeaderItem(0, item)
item = QtGui.QTableWidgetItem()
self.tableSusAmigos.setHorizontalHeaderItem(1, item)
item = QtGui.QTableWidgetItem()
self.tableSusAmigos.setHorizontalHeaderItem(2, item)
self.tableAmigosde = TableWidgetImage(self)
self.tableAmigosde.setGeometry(QtCore.QRect(470, 110, 381, 461))
self.tableAmigosde.setColumnCount(3)
self.tableAmigosde.setObjectName(_fromUtf8("tableAmigosde"))
self.tableAmigosde.setRowCount(0)
self.tableAmigosde.verticalHeader().setDefaultSectionSize(50)
self.tableAmigosde.setSelectionBehavior(QtGui.QAbstractItemView.SelectRows)
self.tableAmigosde.setEditTriggers(QtGui.QAbstractItemView.NoEditTriggers)
self.tableAmigosde.setSortingEnabled(1)
item = QtGui.QTableWidgetItem()
self.tableAmigosde.setHorizontalHeaderItem(0, item)
item = QtGui.QTableWidgetItem()
self.tableAmigosde.setHorizontalHeaderItem(1, item)
item = QtGui.QTableWidgetItem()
self.tableAmigosde.setHorizontalHeaderItem(2, item)
self.setWindowTitle(_translate("Form", "Form", None))
self.btnCargar.setText(_translate("Form", "Cargar", None))
self.btnCargar.clicked.connect(self.cargarAmigos)
item = self.tableSusAmigos.horizontalHeaderItem(0)
item.setText(_translate("Form", "ID", None))
item = self.tableSusAmigos.horizontalHeaderItem(1)
item.setText(_translate("Form", "Nombre", None))
item = self.tableSusAmigos.horizontalHeaderItem(2)
item.setText(_translate("Form", "Foto", None))
item = self.tableAmigosde.horizontalHeaderItem(0)
item.setText(_translate("Form", "ID", None))
item = self.tableAmigosde.horizontalHeaderItem(1)
item.setText(_translate("Form", "Nombre", None))
item = self.tableAmigosde.horizontalHeaderItem(2)
item.setText(_translate("Form", "Foto", None))
self.pbCarga = QtGui.QProgressBar(self)
self.pbCarga.setGeometry(QtCore.QRect(20, 590, 391, 23))
self.pbCarga.setProperty("value", 24)
self.pbCarga.setValue(0)
self.pbCarga.setObjectName(_fromUtf8("pbCarga"))
self.setWindowTitle(_translate("Form", "List Friends", None))
self.objDato = DBFacebook()
self.cargarCombo()
QtCore.QMetaObject.connectSlotsByName(self)
self.tableSusAmigos.doubleClicked.connect(self.doubleClicked_table)
self.thread = TaskThread(self)
self.thread.started.connect(self.handleTaskUpdated)
def cargarCombo(self):
self.objDato.__enter__()
for row in self.objDato.SELECT_CUENTA_USER():
self.cbUser.addItem(str(row[1]),int(row[0]))
self.objDato.__exit__()
def doubleClicked_table(self):
index = self.tableSusAmigos.selectedIndexes()[0]
self.id_us = int(self.tableSusAmigos.model().data(index).toString())
self.tableAmigosde.setRowCount(0);
self.pbCarga.setRange(0,0)
self.pbCarga.setValue(0)
self.thread.quit()
self.thread.start()
def handleTaskUpdated(self):
rowIndex = 0
self.objDato.__enter__()
for row in self.objDato.SELECT_AMISTADES(self.id_us):
self.tableAmigosde.insertRow(rowIndex)
for column in range(0,3):
if column == 2:
self.tableAmigosde.setImage(rowIndex, column, str(row[column]))
else:
newItem = QtGui.QTableWidgetItem(str(row[column]).decode('utf-8'))
self.tableAmigosde.setItem(rowIndex,column,newItem)
rowIndex = rowIndex + 1
self.objDato.__exit__()
self.pbCarga.setRange(0,1)
self.pbCarga.setValue(1)
def cargarAmigos(self):
id_us = self.cbUser.itemData(self.cbUser.currentIndex()).toPyObject()
self.objDato.__enter__()
rowIndex = 0
self.tableSusAmigos.setRowCount(0);
for row in self.objDato.SELECT_AMISTADES(id_us):
self.tableSusAmigos.insertRow(rowIndex)
for column in range(0,3):
if column == 2:
self.tableSusAmigos.setImage(rowIndex, column, str(row[column]))
else:
newItem = QtGui.QTableWidgetItem(str(row[column]).decode('utf-8'))
self.tableSusAmigos.setItem(rowIndex,column,newItem)
rowIndex = rowIndex + 1
self.objDato.__exit__()
class TaskThread(QtCore.QThread):
def __init__(self,parent):
QtCore.QThread.__init__(self, parent)
def run(self):
self.emit(QtCore.SIGNAL('started'))
if __name__ == "__main__":
import sys
app = QtGui.QApplication(sys.argv)
ui = Ui_friendForm()
ui.show()
sys.exit(app.exec_())
我在申请表上附上一张照片。提前谢谢
小部件只能从主线程中访问。但是,使用插槽和信号,只要使用默认连接类型,就可以从另一个线程安全地与UI交互
检查我不久前创建的示例(在wiki中有关于代码的详细信息)。基本上,您所需要做的就是在表小部件所在的位置添加一个插槽。使用插槽的参数(将为表项提供数据),您只需创建
QTableWidgetItem
并插入它。至于信号本身,它可以从查询数据库并将检索到的数据转换为一个或多个表行的对象所在的工作线程发出,然后通过该信号发出。小部件只能从主线程内访问。但是,使用插槽和信号,只要使用默认连接类型,就可以从另一个线程安全地与UI交互
检查我不久前创建的示例(在wiki中有关于代码的详细信息)。基本上,您所需要做的就是在表小部件所在的位置添加一个插槽。使用插槽的参数(将为表项提供数据),您只需创建
QTableWidgetItem
并插入它。至于信号本身,它可以从查询数据库并将检索到的数据转换为一个或多个表行的对象所在的工作线程发出,然后通过该信号发出。我想解决同样的问题我想解决同样的问题