用于QTreeView的PyQt ToolTip

时间:2015-06-02 21:56:55

标签: pyqt tooltip qtreeview

请解决如何在QTreeView中为每个项目启用和显示工具提示的方法。我找到了代码class TreeModel(QAbstractItemModel)的示例,但由于我的初学者水平,我无法理解如何将其应用到我的需求中。

工具提示的数据应取自密钥值#34;注意"在字典data_for_tree

#!/usr/bin/env python -tt
# -*- coding: utf-8 -*-

from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *

import sys
reload(sys)
sys.setdefaultencoding('utf8')

data_for_tree = {"tomato":{"color":"red","ammount":"10", "note":"a note for tomato"},"banana":{"color":"yellow","ammount":"1", "note":"b note for banana"}, "some fruit":{"color":"unknown","ammount":"100", "note":"some text"}}

class TreeModel(QAbstractItemModel):

    def data(self, index, role=Qt.DisplayRole):
        #...
        if role == Qt.ToolTipRole:
            return 'ToolTip'

    def flags(self, index):
        if not index.isValid():
            return Qt.NoItemFlags # 0
        return Qt.ItemIsSelectable # or Qt.ItemIsEnabled            

class ProxyModel(QSortFilterProxyModel):

    def __init__(self, parent=None):
        super(ProxyModel, self).__init__(parent)

    def lessThan(self, left, right):
        leftData = self.sourceModel().data(left)
        rightData = self.sourceModel().data(right)
        try:
            return float(leftData) < float(rightData)
        except ValueError:
            return leftData < rightData

class MainFrame(QWidget):
    def __init__(self):
        QWidget.__init__(self)

        self.MyTreeView = QTreeView()
        self.MyTreeViewModel = QStandardItemModel()
        self.MyTreeView.setModel(self.MyTreeViewModel)
        self.most_used_cat_header = ['Name', "ammount", "color"]
        self.MyTreeViewModel.setHorizontalHeaderLabels(self.most_used_cat_header)
        self.MyTreeView.setSortingEnabled(True)
        self.MyTreeView_Fill()

        MainWindow = QHBoxLayout(self)    
        MainWindow.addWidget(self.MyTreeView)
        self.setLayout(MainWindow)

    def MyTreeView_Fill(self):
        for k in data_for_tree:
            name = QStandardItem(k)
            ammount = QStandardItem(data_for_tree[k]["ammount"])
            note = QStandardItem(data_for_tree[k]["color"])
            tooltip = data_for_tree[k]["note"]
            item = (name, ammount, note)
            self.MyTreeViewModel.appendRow(item)
        self.MyTreeView.sortByColumn(1, Qt.DescendingOrder)
        proxyModel = ProxyModel(self)
        proxyModel.setSourceModel(self.MyTreeViewModel)
        self.MyTreeView.setModel(proxyModel)

        c = 0
        while c < len(self.most_used_cat_header):
            self.MyTreeView.resizeColumnToContents(c)
            c=c+1

if __name__ == "__main__":
    app = QApplication(sys.argv)
    main = MainFrame()
    main.show()
    main.move(app.desktop().screen().rect().center() - main.rect().center())
sys.exit(app.exec_())

1 个答案:

答案 0 :(得分:1)

当您使用QStandardItemQStandardItemModel课程时(这是我推荐的课程!)您不需要为找到的TreeModel课程烦恼。很少需要创建自己的模型,但由于某些原因,教程通常会鼓励您这样做。如果您发现某些事情鼓励您继承QAbstractItemModel,我建议您首先检查堆栈溢出,看看是否有更简单的方法来执行它!在这种情况下,有一种非常简单的方法来添加工具提示。

如果您查看C ++文档(我经常发现它比PyQt文档更有用,可以找出可用的方法),您会发现QStandardItem有一个名为setToolTip()的方法。< / p>

因此,您需要做的就是在添加到模型中的每个项目上调用此方法。例如,在MyTreeView_Fill方法的循环内部:

name = QStandardItem(k)
ammount = QStandardItem(data_for_tree[k]["ammount"])
note = QStandardItem(data_for_tree[k]["color"])
tooltip = data_for_tree[k]["note"]
name.setToolTip(tooltip)
ammount.setToolTip(tooltip)
note.setToolTip(tooltip)

在这里,我将工具提示设置为对于行中的每个单元格(名称,数量和注释)都相同,但您可以轻松地将其更改为其中一个单元格具有不同的工具提示(希望很明显)该怎么做)