Désélectionnez le Gtk TreeSelection lors de la clera du modèle TreeStore

Question

J'ai suivi le tutoriel python-gtk-3 et implémenté un simple navigateur de fichiers à l'aide de Gtk TreeView. Cela fonctionne plutôt bien, mais mon problème est que, au moment de l'initialisation, le premier élément du TreeView est déjà sélectionné par défaut.

J'initialise TreeSelection en utilisant:

treeSelection = treeView.get_selection()

Ensuite, je connecte la sélection d'arborescence avec une fonction de rappel:

treeSelection.connect("changed", treeSelectionChanged) def treeSelectionChanged(treeSelection): treeModel, treeIter = treeSelection.get_selected() if treeIter != None: print "You selected", treeModel[treeIter][0]

Lorsque mon application démarre, la première entrée dans TreeView est déjà sélectionnée et son nom est imprimé. Si je relis les données et efface le modèle d'arbre (treeStore.clear ()) j'obtiens également des réponses aux "changements" dans TreeView et les noms des autres éléments dans TreeView sont également imprimés en dehors.

Je ne sais pas comment désélectionner la sélection effectuée par défaut et désélectionner tous les éléments avant d'effacer le TreeStore. Je ne pouvais pas comprendre comment. Quelqu'un pourrait-il me signaler mon erreur? Voici l'exemple de code:

#!/usr/bin/python import os, stat from gi.repository import Gtk from gi.repository.GdkPixbuf import Pixbuf class MainWindow(Gtk.Window): def __init__(self): Gtk.Window.__init__(self, title="Simple Photo Importer", default_width = 400,default_height = 600) # initialize new Gtk box container self.fileSystemTreeBox = Gtk.Box.new(Gtk.Orientation.VERTICAL, 5) self.add(self.fileSystemTreeBox) # initialize the filesystem treestore self.fileSystemTreeStore = Gtk.TreeStore(str, Pixbuf, str, bool) # populate the tree store self.populateFileSystemTreeStore(self.fileSystemTreeStore, '/home/karlitos') # initialize the TreeView self.fileSystemTreeView = Gtk.TreeView(self.fileSystemTreeStore)#, default_width = 400,default_height = 600) self.fileSystemTreeView.set_headers_visible(False) #self.fileSystemTreeView.columns_autosize() # Create a TreeViewColumn treeViewCol = Gtk.TreeViewColumn(title=None) treeViewCol.set_sizing(Gtk.TreeViewColumnSizing.AUTOSIZE) #treeViewCol.expand = True # Create a column cell to display text colCellText = Gtk.CellRendererText() # Create a column cell to display an image colCellImg = Gtk.CellRendererPixbuf() # Add the cells to the column treeViewCol.pack_start(colCellImg, False) treeViewCol.pack_start(colCellText, True) # Bind the text cell to column 0 of the tree's model treeViewCol.add_attribute(colCellText, "text", 0) # Bind the image cell to column 1 of the tree's model treeViewCol.add_attribute(colCellImg, "pixbuf", 1) # Append the columns to the TreeView self.fileSystemTreeView.append_column(treeViewCol) # add "on expand" callback self.fileSystemTreeView.connect("row-expanded", self.onRowExpanded) # add "on collapse" callback self.fileSystemTreeView.connect("row-collapsed", self.onRowCollapsed) # add tree view selection fileSystemTreeSelection = self.fileSystemTreeView.get_selection() fileSystemTreeSelection.connect("changed", self.fileSystemTreeSelectionChanged) # add scroll view self.scrollView = Gtk.ScrolledWindow() self.scrollView.add(self.fileSystemTreeView) # append the scrollView to the window (this) #self.add(self.scrollView) self.fileSystemTreeBox.pack_start(self.scrollView, True, True, 0) # add a button for selecting different folder self.readNewDirButton = Gtk.Button(label="Read new directory") self.readNewDirButton.connect("clicked", self.readNewDirectory) #self.add(self.readNewDirButton) self.fileSystemTreeBox.pack_start(self.readNewDirButton, False, False, 0) def populateFileSystemTreeStore(self, treeStore, path, parent=None): appendHiddenItems = False folders = [] files = [] # iterate over the items in the path for item in os.listdir(path): # skip item if it's name brgiins with '.' and appendHiddenItems ist set to 'false' if not appendHiddenItems and item[0] == '.': continue # Get the absolute path of the item itemFullname = os.path.join(path, item) # Extract metadata from the item itemMetaData = os.stat(itemFullname) # Determine if the item is a folder itemIsFolder = stat.S_ISDIR(itemMetaData.st_mode) # Generate an icon from the default icon theme itemIcon = Gtk.IconTheme.get_default().load_icon("folder" if itemIsFolder else "empty", 22, 0) # Append the item with corresponding metadata to related arrays if itemIsFolder: folders.append([item, itemIcon, itemFullname, itemIsFolder]) else: files.append([item, itemIcon, itemFullname, itemIsFolder]) # append dummy when no entries in the current folder if not folders and not files: treeStore.append(parent, [None, None, None, None]) else: for folderEntry in sorted(folders): # append the folders currentIter = treeStore.append(parent, folderEntry) # append the dummy nodes to the folders treeStore.append(currentIter, [None, None, None, None]) for fileEntry in sorted(files): treeStore.append(parent, fileEntry) def onRowExpanded(self, treeView, treeIter, treePath): # get the associated model treeStore = treeView.get_model() # get the full path of the position newPath = treeStore.get_value(treeIter, 2) # populate the subtree on curent position self.populateFileSystemTreeStore(treeStore, newPath, treeIter) # remove the first child (dummy node) treeStore.remove(treeStore.iter_children(treeIter)) def onRowCollapsed(self, treeView, treeIter, treePath): # get the associated model treeStore = treeView.get_model() # get the iterator of the first child currentChildIter = treeStore.iter_children(treeIter) # loop as long as some childern exist while currentChildIter: # remove the first child treeStore.remove(currentChildIter) # refresh the iterator of the next child currentChildIter = treeStore.iter_children(treeIter) # append dummy node treeStore.append(treeIter, [None, None, None, None]) def readNewDirectory(self, widget): # initialize the open directory dialog openDirectoryDialog = Gtk.FileChooserDialog("Please choose a folder", self, Gtk.FileChooserAction.SELECT_FOLDER, (Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL, "Select", Gtk.ResponseType.OK)) openDirectoryDialog.set_default_size(800, 400) # initialize the response openDirectoryResponse = openDirectoryDialog.run() if openDirectoryResponse == Gtk.ResponseType.OK: self.fileSystemTreeStore.clear() self.populateFileSystemTreeStore(self.fileSystemTreeStore, openDirectoryDialog.get_filename()) #Elif openDirectoryResponse == Gtk.ResponseType.CANCEL: #do something openDirectoryDialog.destroy() def fileSystemTreeSelectionChanged(self, fileSystemTreeSelection): fileSystemTreeModel, fileSystemTreeIter = fileSystemTreeSelection.get_selected()#_rows() if fileSystemTreeIter != None: print "You selected", fileSystemTreeModel[fileSystemTreeIter][0] win = MainWindow() win.connect("delete-event", Gtk.main_quit) win.show_all() Gtk.main()

user2461236 · Answer

Il existe une fonction qui fait exactement ce que vous demandez, mais qui ne fonctionnerait pas dans le __init__ de votre exemple, cette fonction s'appelle unselect_all, et appartient à Gtk.TreeSelection. J'ai donc pris le lit de la rivière pour éditer son exemple.

Pardonnez l'anglais, est extrait du traducteur Google.

#!/usr/bin/python import os, stat from gi.repository import Gtk from gi.repository.GdkPixbuf import Pixbuf class MainWindow(Gtk.Window): def __init__(self): Gtk.Window.__init__(self, title="Simple Photo Importer", default_width = 400,default_height = 600) # initialize new Gtk box container self.firstSelection = True self.fileSystemTreeBox = Gtk.Box.new(Gtk.Orientation.VERTICAL, 5) self.add(self.fileSystemTreeBox) # initialize the filesystem treestore self.fileSystemTreeStore = Gtk.TreeStore(str, Pixbuf, str, bool) # populate the tree store self.populateFileSystemTreeStore(self.fileSystemTreeStore, os.path.expanduser('~')) # initialize the TreeView self.fileSystemTreeView = Gtk.TreeView(self.fileSystemTreeStore)#, default_width = 400,default_height = 600) self.fileSystemTreeView.set_headers_visible(False) #self.fileSystemTreeView.columns_autosize() # Create a TreeViewColumn treeViewCol = Gtk.TreeViewColumn(title=None) treeViewCol.set_sizing(Gtk.TreeViewColumnSizing.AUTOSIZE) #treeViewCol.expand = True # Create a column cell to display text colCellText = Gtk.CellRendererText() # Create a column cell to display an image colCellImg = Gtk.CellRendererPixbuf() # Add the cells to the column treeViewCol.pack_start(colCellImg, False) treeViewCol.pack_start(colCellText, True) # Bind the text cell to column 0 of the tree's model treeViewCol.add_attribute(colCellText, "text", 0) # Bind the image cell to column 1 of the tree's model treeViewCol.add_attribute(colCellImg, "pixbuf", 1) # Append the columns to the TreeView self.fileSystemTreeView.append_column(treeViewCol) # add "on expand" callback self.fileSystemTreeView.connect("row-expanded", self.onRowExpanded) # add "on collapse" callback self.fileSystemTreeView.connect("row-collapsed", self.onRowCollapsed) # add tree view selection fileSystemTreeSelection = self.fileSystemTreeView.get_selection() fileSystemTreeSelection.connect("changed", self.fileSystemTreeSelectionChanged) # add scroll view self.scrollView = Gtk.ScrolledWindow() self.scrollView.add(self.fileSystemTreeView) # append the scrollView to the window (this) #self.add(self.scrollView) self.fileSystemTreeBox.pack_start(self.scrollView, True, True, 0) # add a button for selecting different folder self.readNewDirButton = Gtk.Button(label="Read new directory") self.readNewDirButton.connect("clicked", self.readNewDirectory) #self.add(self.readNewDirButton) self.fileSystemTreeBox.pack_start(self.readNewDirButton, False, False, 0) def populateFileSystemTreeStore(self, treeStore, path, parent=None): appendHiddenItems = False folders = [] files = [] # iterate over the items in the path for item in os.listdir(path): # skip item if it's name brgiins with '.' and appendHiddenItems ist set to 'false' if not appendHiddenItems and item[0] == '.': continue # Get the absolute path of the item itemFullname = os.path.join(path, item) # Extract metadata from the item itemMetaData = os.stat(itemFullname) # Determine if the item is a folder itemIsFolder = stat.S_ISDIR(itemMetaData.st_mode) # Generate an icon from the default icon theme itemIcon = Gtk.IconTheme.get_default().load_icon("folder" if itemIsFolder else "empty", 22, 0) # Append the item with corresponding metadata to related arrays if itemIsFolder: folders.append([item, itemIcon, itemFullname, itemIsFolder]) else: files.append([item, itemIcon, itemFullname, itemIsFolder]) # append dummy when no entries in the current folder if not folders and not files: treeStore.append(parent, [None, None, None, None]) else: for folderEntry in sorted(folders): # append the folders currentIter = treeStore.append(parent, folderEntry) # append the dummy nodes to the folders treeStore.append(currentIter, [None, None, None, None]) for fileEntry in sorted(files): treeStore.append(parent, fileEntry) def onRowExpanded(self, treeView, treeIter, treePath): # get the associated model treeStore = treeView.get_model() # get the full path of the position newPath = treeStore.get_value(treeIter, 2) # populate the subtree on curent position self.populateFileSystemTreeStore(treeStore, newPath, treeIter) # remove the first child (dummy node) treeStore.remove(treeStore.iter_children(treeIter)) def onRowCollapsed(self, treeView, treeIter, treePath): # get the associated model treeStore = treeView.get_model() # get the iterator of the first child currentChildIter = treeStore.iter_children(treeIter) # loop as long as some childern exist while currentChildIter: # remove the first child treeStore.remove(currentChildIter) # refresh the iterator of the next child currentChildIter = treeStore.iter_children(treeIter) # append dummy node treeStore.append(treeIter, [None, None, None, None]) def readNewDirectory(self, widget): # initialize the open directory dialog openDirectoryDialog = Gtk.FileChooserDialog("Please choose a folder", self, Gtk.FileChooserAction.SELECT_FOLDER, (Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL, "Select", Gtk.ResponseType.OK)) openDirectoryDialog.set_default_size(800, 400) # initialize the response openDirectoryResponse = openDirectoryDialog.run() if openDirectoryResponse == Gtk.ResponseType.OK: self.fileSystemTreeStore.clear() self.populateFileSystemTreeStore(self.fileSystemTreeStore, openDirectoryDialog.get_filename()) #Elif openDirectoryResponse == Gtk.ResponseType.CANCEL: #do something openDirectoryDialog.destroy() def fileSystemTreeSelectionChanged(self, fileSystemTreeSelection): fileSystemTreeModel, fileSystemTreeIter = fileSystemTreeSelection.get_selected()#_rows() if fileSystemTreeIter != None and not self.firstSelection: print "You selected", fileSystemTreeModel[fileSystemTreeIter][0] Elif self.firstSelection: fileSystemTreeSelection.unselect_all() self.firstSelection = False win = MainWindow() win.connect("delete-event", Gtk.main_quit) win.show_all() Gtk.main()