我有很多物品，我想让物品变得更加用户友好，我决定将这些物品分成不同的页面。我在页面上放置了上一个和下一个按钮。在上一次单击时，它应该显示总项目中的前两个项目，下一个应该显示接下来的两个项目。如果当我单击下一步按钮时我还有20个项目，我想在页面的滚动区域中显示这些项目。有什么想法我应该怎么做吗？在我的程序中，我想在每个页面中显示项目限制：仅2个项目。
下面是我的代码：
from PyQt4 import QtCore, QtGui
class InventoryDelegate(QtGui.QStyledItemDelegate):
def paint(self, painter, option, index):
super(InventoryDelegate, self).paint(painter, option, index)
if not index.parent().isValid():
painter.save()
painter.setPen(QtGui.QPen(QtGui.QColor("white")))
r = QtCore.QRect(option.rect)
r.adjust(0, 1, 0, -1)
painter.drawLine(r.topLeft(), r.topRight())
painter.drawLine(r.bottomLeft(), r.bottomRight())
painter.restore()
def sizeHint(self, option, index):
s = super(InventoryDelegate, self).sizeHint(option, index)
s.setHeight(55)
return s
class Inventory_Items(QtGui.QMainWindow):
def __init__(self, parent=None):
super(Inventory_Items, self).__init__(parent)
inv_obj =[{u'productPrice': 123.0, u'productSerialId': u'123458', u'productName': u'Renewal Application Form', u'productDiscount': 0, u'productdp': u'/media/ecommerce/pictureUploads/1546958016_35_admin_index.jpeg', u'productUnit': u'Quantity', u'data': [{u'product': 1837, u'product__unit': u'Quantity', u'productVariant__unitPerpack': None, u'productVariant': None, u'productVariant__price': None, u'product__serialNo': u'123457', u'product__howMuch': 2.0, u'productVariant__serialId': None, u'product__price': 123.0, u'pk': 65, u'productVariant__sku': None, u'quantity': -11.0}, {u'product': 1837, u'product__unit': u'Quantity', u'productVariant__unitPerpack': None, u'productVariant': None, u'productVariant__price': None, u'product__serialNo': u'123458', u'product__howMuch': 2.0, u'productVariant__serialId': None, u'product__price': 123.0, u'pk': 67, u'productVariant__sku': None, u'quantity': 10.0}, {u'product': 1837, u'product__unit': u'Quantity', u'productVariant__unitPerpack': None, u'productVariant': None, u'productVariant__price': None, u'product__serialNo': u'123459', u'product__howMuch': 2.0, u'productVariant__serialId': None, u'product__price': 123.0, u'pk': 69, u'productVariant__sku': None, u'quantity': 30.0}], u'productPk': 1837}, {u'productPrice': 1760.0, u'productSerialId': u'1168', u'productName': u'Truth or Delusion', u'productDiscount': 5, u'productdp': u'/media/ecommerce/pictureUploads/1546959987_35_admin_default.png', u'productUnit': u'Kilogram', u'data': [{u'product': 2180, u'product__unit': u'Kilogram', u'productVariant__unitPerpack': None, u'productVariant': None, u'productVariant__price': None, u'product__serialNo': u'IND-BOK-D-2016-TRUDEL-02', u'product__howMuch': 1.0, u'productVariant__serialId': None, u'product__price': 1760.0, u'pk': 70, u'productVariant__sku': None, u'quantity': 10.0}, {u'product': 2180, u'product__unit': u'Kilogram', u'productVariant__unitPerpack': None, u'productVariant': None, u'productVariant__price': None, u'product__serialNo': u'IND-BOK-D-2016-TRUDEL-01', u'product__howMuch': 1.0, u'productVariant__serialId': None, u'product__price': 1760.0, u'pk': 71, u'productVariant__sku': None, u'quantity': 1.0}], u'productPk': 2180}, {u'productPrice': 240.0, u'productSerialId': u'1219', u'productName': u'One-to-One Follow Up Slips ( Qty 10 pads - 50 sheets per pad)', u'productDiscount': 0, u'productdp': u'/media/ecommerce/pictureUploads/https%3A//bnistore.in/wp-content/uploads/2016/02/323.jpg', u'productUnit': u'Quantity', u'data': [{u'product': 2185, u'product__unit': u'Quantity', u'productVariant__unitPerpack': None, u'productVariant': None, u'productVariant__price': None, u'product__serialNo': u'123457', u'product__howMuch': 1.0, u'productVariant__serialId': None, u'product__price': 240.0, u'pk': 62, u'productVariant__sku': None, u'quantity': -48.0}], u'productPk': 2185}, {u'productPrice': 1500.0, u'productSerialId': u'3293', u'productName': u'Membership Application Form (Package of 10)', u'productDiscount': 0, u'productdp': u'/media/ecommerce/pictureUploads/https%3A//bnistore.in/wp-content/uploads/2017/08/New-Members-Application-Form.png', u'productUnit': u'quantity', u'data': [{u'product': 2225, u'product__unit': u'quantity', u'productVariant__unitPerpack': None, u'productVariant': None, u'productVariant__price': None, u'product__serialNo': u'IND-PRT-D-2016-NEWAPP-1', u'product__howMuch': 1.0, u'productVariant__serialId': None, u'product__price': 1500.0, u'pk': 66, u'productVariant__sku': None, u'quantity': 81.0}], u'productPk': 2225}]
self.w = QtGui.QWidget()
vbox = QtGui.QVBoxLayout(w)
self.scrollArea = QtGui.QScrollArea(widgetResizable=True)
self.scrollArea.setWidget(self.w)
hbox = QtGui.QHBoxLayout()
self.le = QtGui.QLineEdit()
search = QtGui.QPushButton("search")
prev_btn = QtGui.QPushButton("previous")
prev_btn.clicked.connect(self.prevous_page)
nxt_btn = QtGui.QPushButton("next")
nxt_btn.clicked.connect(self.next_page)
hbox.addWidget(self.le)
hbox.addWidget(search)
hbox.addWidget(prev_btn)
hbox.addWidget(nxt_btn)
vbox.addLayout(hbox)
self.inventory_widget = QtGui.QTreeWidget(columnCount=7,
expandsOnDoubleClick=False,
indentation=0,
focusPolicy=QtCore.Qt.NoFocus,
iconSize=QtCore.QSize(40,60))
vbox.addWidget(self.inventory_widget)
self.inventory_widget.setColumnWidth(2, 350)
self.inventory_widget.setStyleSheet("QWidget {background-color: black;color: white;}")
header = self.inventory_widget.header()
header.hide()
header.setResizeMode(0, QtGui.QHeaderView.ResizeToContents)
header.setResizeMode(1, QtGui.QHeaderView.ResizeToContents)
header.setResizeMode(2, QtGui.QHeaderView.Stretch)
header.setResizeMode(3, QtGui.QHeaderView.Stretch)
header.setResizeMode(4, QtGui.QHeaderView.Stretch)
header.setResizeMode(5, QtGui.QHeaderView.ResizeToContents)
header.setResizeMode(6, QtGui.QHeaderView.ResizeToContents)
delegate = InventoryDelegate(self.inventory_widget)
self.inventory_widget.setItemDelegate(delegate)
c=[]
for obj in inv_obj:
it = QtGui.QTreeWidgetItem()
self.inventory_widget.addTopLevelItem(it)
values = [
obj["productName"],
"Unit : {0} ".format(obj["productUnit"]),
"Price : {0} ".format(obj["productPrice"]),
"Discount : {0} ".format(obj["productDiscount"])
]
for i, t in enumerate(values):
it.setText(i + 1, t)
for v in obj['data']:
child_it = QtGui.QTreeWidgetItem()
it.addChild(child_it)
value = [
v['product__serialNo'],
"{}".format(v['product__howMuch']),
]
for l, m in enumerate(value):
child_it.setText(l + 1, m)
# widget = Widget(v['quantity'])
# widget.saveClicked.connect(self.save_qty)
# self.inventory_widget.setItemWidget(child_it, 3, widget)
self.inventory_widget.expandAll()
self.setCentralWidget(self.w)
@QtCore.pyqtSlot()
def prevous_page(self):
for i in range(self.inventory_widget.topLevelItemCount()):
top_item = self.inventory_widget.topLevelItem(i)
print len(i)
#how can i write logic here[here i have a totally 4 items,in that i want to display first 2 items in 1t page ]
def next_page(self):
pass#here when i click the next button i want to see another 2 items in scroll area
if __name__ == '__main__':
import sys
app = QtGui.QApplication(sys.argv)
settingobj= Inventory_Items()
settingobj.showFullScreen()
sys.exit(app.exec_())
答案 0 :(得分：1)
class Inventory_Items(QtGui.QMainWindow):
def __init__(self, parent=None):
super(Inventory_Items, self).__init__(parent)
self.inv_obj =[{u'productPrice': 123.0, u'productSerialId': u'123458', u'productName': u'Renewal Application Form', u'productDiscount': 0, u'productdp': u'/media/ecommerce/pictureUploads/1546958016_35_admin_index.jpeg', u'productUnit': u'Quantity', u'data': [{u'product': 1837, u'product__unit': u'Quantity', u'productVariant__unitPerpack': None, u'productVariant': None, u'productVariant__price': None, u'product__serialNo': u'123457', u'product__howMuch': 2.0, u'productVariant__serialId': None, u'product__price': 123.0, u'pk': 65, u'productVariant__sku': None, u'quantity': -11.0}, {u'product': 1837, u'product__unit': u'Quantity', u'productVariant__unitPerpack': None, u'productVariant': None, u'productVariant__price': None, u'product__serialNo': u'123458', u'product__howMuch': 2.0, u'productVariant__serialId': None, u'product__price': 123.0, u'pk': 67, u'productVariant__sku': None, u'quantity': 10.0}, {u'product': 1837, u'product__unit': u'Quantity', u'productVariant__unitPerpack': None, u'productVariant': None, u'productVariant__price': None, u'product__serialNo': u'123459', u'product__howMuch': 2.0, u'productVariant__serialId': None, u'product__price': 123.0, u'pk': 69, u'productVariant__sku': None, u'quantity': 30.0}], u'productPk': 1837}, {u'productPrice': 1760.0, u'productSerialId': u'1168', u'productName': u'Truth or Delusion', u'productDiscount': 5, u'productdp': u'/media/ecommerce/pictureUploads/1546959987_35_admin_default.png', u'productUnit': u'Kilogram', u'data': [{u'product': 2180, u'product__unit': u'Kilogram', u'productVariant__unitPerpack': None, u'productVariant': None, u'productVariant__price': None, u'product__serialNo': u'IND-BOK-D-2016-TRUDEL-02', u'product__howMuch': 1.0, u'productVariant__serialId': None, u'product__price': 1760.0, u'pk': 70, u'productVariant__sku': None, u'quantity': 10.0}, {u'product': 2180, u'product__unit': u'Kilogram', u'productVariant__unitPerpack': None, u'productVariant': None, u'productVariant__price': None, u'product__serialNo': u'IND-BOK-D-2016-TRUDEL-01', u'product__howMuch': 1.0, u'productVariant__serialId': None, u'product__price': 1760.0, u'pk': 71, u'productVariant__sku': None, u'quantity': 1.0}], u'productPk': 2180}, {u'productPrice': 240.0, u'productSerialId': u'1219', u'productName': u'One-to-One Follow Up Slips ( Qty 10 pads - 50 sheets per pad)', u'productDiscount': 0, u'productdp': u'/media/ecommerce/pictureUploads/https%3A//bnistore.in/wp-content/uploads/2016/02/323.jpg', u'productUnit': u'Quantity', u'data': [{u'product': 2185, u'product__unit': u'Quantity', u'productVariant__unitPerpack': None, u'productVariant': None, u'productVariant__price': None, u'product__serialNo': u'123457', u'product__howMuch': 1.0, u'productVariant__serialId': None, u'product__price': 240.0, u'pk': 62, u'productVariant__sku': None, u'quantity': -48.0}], u'productPk': 2185}, {u'productPrice': 1500.0, u'productSerialId': u'3293', u'productName': u'Membership Application Form (Package of 10)', u'productDiscount': 0, u'productdp': u'/media/ecommerce/pictureUploads/https%3A//bnistore.in/wp-content/uploads/2017/08/New-Members-Application-Form.png', u'productUnit': u'quantity', u'data': [{u'product': 2225, u'product__unit': u'quantity', u'productVariant__unitPerpack': None, u'productVariant': None, u'productVariant__price': None, u'product__serialNo': u'IND-PRT-D-2016-NEWAPP-1', u'product__howMuch': 1.0, u'productVariant__serialId': None, u'product__price': 1500.0, u'pk': 66, u'productVariant__sku': None, u'quantity': 81.0}], u'productPk': 2225}]
self.w = QtGui.QWidget()
vbox = QtGui.QVBoxLayout(self.w)
Inventory_scrollarea = QtGui.QScrollArea(widgetResizable=True)
Inventory_scrollarea.setWidget(self.w)
hbox = QtGui.QHBoxLayout()
self.le = QtGui.QLineEdit()
search = QtGui.QPushButton("search")
search.clicked.connect(self.refresh_inventory)
previous = QtGui.QPushButton("previous")
previous.clicked.connect(self.previous_page)
next = QtGui.QPushButton("next")
next.clicked.connect(self.next_page)
hbox.addWidget(self.le)
hbox.addWidget(previous)
hbox.addWidget(next)
hbox.addWidget(search)
vbox.addLayout(hbox)
self.inventory_widget = QtGui.QTreeWidget(columnCount=7,
expandsOnDoubleClick=False,
indentation=0,
focusPolicy=QtCore.Qt.NoFocus,
iconSize=QtCore.QSize(40,60))
vbox.addWidget(self.inventory_widget)
self.inventory_widget.setSelectionMode(QtGui.QAbstractItemView.NoSelection)
self.inventory_widget.setColumnWidth(2, 350)
self.inventory_widget.setStyleSheet("QWidget {background-color: black;color: white;}")
header = self.inventory_widget.header()
header.hide()
header.setResizeMode(0, QtGui.QHeaderView.ResizeToContents)
header.setResizeMode(1, QtGui.QHeaderView.ResizeToContents)
header.setResizeMode(2, QtGui.QHeaderView.Stretch)
header.setResizeMode(3, QtGui.QHeaderView.Stretch)
header.setResizeMode(4, QtGui.QHeaderView.Stretch)
header.setResizeMode(5, QtGui.QHeaderView.ResizeToContents)
header.setResizeMode(6, QtGui.QHeaderView.ResizeToContents)
delegate = InventoryDelegate(self.inventory_widget)
self.inventory_widget.setItemDelegate(delegate)
self.x=2
self.y=0
self.fun(self.y,self.x)
def fun(self,y,xxx):
self.inventory_widget.clear()
for obj in self.inv_obj[y:xxx]:
it = QtGui.QTreeWidgetItem()
self.inventory_widget.addTopLevelItem(it)
values = [
obj["productName"],
"Product Weight",
"Unit : {0} ".format(obj["productUnit"]),
"Price : {0} ".format(obj["productPrice"]),
"Discount : {0} ".format(obj["productDiscount"])
]
for i, t in enumerate(values):
it.setText(i + 1, t)
for v in obj['data']:
child_it = QtGui.QTreeWidgetItem()
it.addChild(child_it)
value = [
v['product__serialNo'],
"{}".format(v['product__howMuch']),
]
for l, m in enumerate(value):
child_it.setText(l + 1, m)
self.inventory_widget.expandAll()
self.setCentralWidget(self.w)
def previous_page(self):
self.x =self.x-2
self.y =self.y-2
self.fun(self.y,self.x)
def next_page(self):
self.y=self.x
self.x=self.x+2
self.fun(self.y,self.x)