2015-11-13 51 views
0

我構建了一個可檢查的樹視圖,列出了文件/文件夾。我正在保存被檢查的文件/文件夾,並將它們寫入文件。當我再次啓動樹視圖時,我希望檢查所有保存的路徑。但是我無法獲得路徑的正確索引。在樹形視圖中獲取可用路徑的索引

class CheckableModel(QtGui.QFileSystemModel): 
    def __init__(self, tView, parent=None): 
     QtGui.QFileSystemModel.__init__(self, tView) 
     self.tView = tView 
     self.checks = {} 

     backupstr = fileread(os.path.join(os.path.expanduser("~"), "Desktop"), "saved.txt", "utf-16") 

     if backupstr: 
      backuplist = backupstr.split('\n') 
      for backupitem in backuplist:   
       self.setData(self.index(backupitem), QtCore.Qt(QtCore.Qt.Checked), QtCore.Qt.CheckStateRole) 

我試着用self.index(QString),但它不能正常工作的所有時間。就像,當我試圖從self.checks中刪除這個條目時(取消選中以這種方式加載的節點),它無法在self.checks中找到該索引。

那麼,當我們只有路徑時,在樹視圖中獲取索引(QModelIndex)的正確方法是什麼?

編輯:

setData()被實施如下:

def setData(self, index, value, role): 

    if (role == QtCore.Qt.CheckStateRole) and (index.column() == 0): 
     if value == QtCore.Qt.Checked: 
      self.removesubfolders(index) 
      self.checks[index] = value 
      count = self.rowCount(index) 

      self.dataChanged.emit(index.child(0, 0), index.child(count - 1, 0)) 
      self.tView.collapse(index) 
      return True 

     elif value == QtCore.Qt.Unchecked: 
      self.removesubfolders(index) 
      self.tView.collapse(index) 
      return True 

    return QtGui.QFileSystemModel.setData(self, index, value, role) 


def removesubfolders(self, index): 
    checkedItems = [] 

    for otherindex, othervalue in self.checks.items(): 
     if othervalue.toBool(): 
      checkedItems.append(str(self.filePath(otherindex))) 

    uncheckpath = str(self.filePath(index)) 
    indices = [removeindex for removeindex in checkedItems if (removeindex.find(uncheckpath) != -1)] 

    for idx in indices: 
     localidx = self.index(idx) 
     if localidx in self.checks: 
      self.checks.pop(localidx) 
+1

您能提供一個更完整的例子嗎?例如,如何添加/刪除'self.checks'中的條目,因爲它似乎是一個問題? – Mel

+0

對不起,我忙於我的項目。我找到了一個工作。我現在保持文件/文件夾路徑的字典來跟蹤選中的項目(如答案中發佈的那樣)。它似乎工作。如果您可以建議更正或提供替代解決方案,將非常感激。 – Harsh

回答

0

發現周圍的工作。我保留文件/文件夾路徑,而不是保留樹節點的QModelIndex。這似乎工作。

class CheckableDirModel(QtGui.QFileSystemModel): 
    def __init__(self, tView, parent=None): 
    QtGui.QFileSystemModel.__init__(self, tView) 
    self.tView = tView 
    self.checks = {} 
    backupstr = fileread(os.path.join(os.path.expanduser("~"), "Desktop"), "saved.txt", "utf-8") 

    if backupstr: 
     backuplist = backupstr.split('\n') 
     for backupitem in backuplist: 
      self.checks[backupitem] = QtCore.Qt.Checked 

def setData(self, index, value, role): 

    if (role == QtCore.Qt.CheckStateRole) and (index.column() == 0): 
     self.tView.selectionchanged = True 
     if value == QtCore.Qt.Checked: 
      self.removesubfolders(index) 
      self.checks[str(self.filePath(index))] = QtCore.Qt.Checked 
     elif value == QtCore.Qt.Unchecked: 
      self.removesubfolders(index) 

def removesubfolders(self, index): 
    checkedItems = [] 

    for otherindex, othervalue in self.checks.items(): 
     if othervalue == QtCore.Qt.Checked: 
      checkedItems.append(otherindex) 

    uncheckpath = str(self.filePath(index)) 
    indices = [removeindex for removeindex in checkedItems if self.eligibleIndex(removeindex, uncheckpath)] 

    for idx in indices: 

     localidx = self.index(idx) 
     if str(self.filePath(localidx)) in self.checks: 
      self.checks.pop(str(self.filePath(localidx))) 
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