Treeview 01

The script shows how to create a list in a GTK3 window.

1. Define an entry box.
2. Define a treeview list with one column.
3. Define some action buttons: Add, Edit, Del and Clear, which can modify the items in the list.
4. Define a status bar at the bottom of the window. The bar shows message from the operations performed.

Source Code

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#!/usr/bin/env python3 # Date : 04/12/2020 (updated for python3) import gi gi.require_version('Gtk', '3.0') from gi.repository import Gtk class Base: def __init__(self): self.win = Gtk.Window() self.win.set_title("TreeView 01") self.win.set_default_size(width=300, height=450) self.win.set_border_width(4) self.win.connect("delete-event", self.WinDelete_event) # # vbox holding all controls mBox = Gtk.VBox(homogeneous=False, spacing=4) self.win.add(mBox) # # entry & add button mH1Box = Gtk.HBox(homogeneous=False, spacing=2) self.entry = Gtk.Entry() mH1Box.pack_start(self.entry,True,True,2) mbutAdd = Gtk.Button(label="+") mbutAdd.connect("clicked",self.callback, "addTag") mH1Box.pack_end(mbutAdd,False,True,2) mBox.pack_start(mH1Box,False,True,2) # # liststore, treeview, cellrenderer, # treeviewcolumn, scrolledwindow self.lstore = Gtk.ListStore(str) self.tview = Gtk.TreeView(model=self.lstore) self.tview.get_selection().connect( "changed", self.RowClick_event) mcellrend = Gtk.CellRendererText() # text = 0 means get data from [0] of the list store lstore mcolText = Gtk.TreeViewColumn("Tags", mcellrend, text=0) # add data mItems = ("item01", "item02", "item03") for mi in mItems: self.lstore.append([mi]) self.tview.append_column(mcolText) mscwin = Gtk.ScrolledWindow() mscwin.set_policy(Gtk.PolicyType.NEVER, Gtk.PolicyType.AUTOMATIC) mscwin.add(self.tview) mBox.pack_start(mscwin,True,True,2) # # button box & 3 buttons mH2Box = Gtk.HBox(spacing=3) # clear button mbutClear = Gtk.Button(label="Clear") mbutClear.connect("clicked",self.callback, "clrTags") mH2Box.pack_start(mbutClear,True,True,2) # del button mbutDel = Gtk.Button(label="Del") mbutDel.connect("clicked",self.callback, "delTag") mH2Box.pack_start(mbutDel,True,True,2) # edit button mbutEdit = Gtk.Button(label="Edit") mbutEdit.connect("clicked",self.callback, "edtTag") mH2Box.pack_start(mbutEdit,True,True,2) mBox.pack_start(mH2Box,False,True,2) # # status bar self.stsBar = Gtk.Statusbar() mBox.pack_start(self.stsBar,False,True,2) # self.win.show_all() # Event Handlers # --------------------------------------------------------- # callback def callback(self, widget, data): if data == 'addTag': # add a Tag to the list mTag = self.entry.get_text() mTag = mTag.strip() if mTag=='': return mIter = self.lstore.append((mTag,)) # make the newly added tag being selected self.tview.get_selection().select_iter(mIter) # push message to status bar mStr = "Add: " + mTag self.pushStatus("addTag",mStr) self.entry.set_text('') elif data == 'edtTag': # edit a Tag in the list mTag = self.entry.get_text() mTag = mTag.strip() if mTag=='': return mIter = self.tview.get_selection().get_selected()[1] # get iter if mIter != None: self.lstore.set_value(mIter,0,mTag) # change col 0 to mTag # make the newly added tag being selected self.tview.get_selection().select_iter(mIter) # push message to status bar mStr = "Edit: " + mTag self.pushStatus("edtTag",mStr) self.entry.set_text('') elif data == 'delTag': # delete a tag from the list # get the current selected iter mIter = self.tview.get_selection().get_selected()[1] mNextIter = None if mIter != None: mModel = self.tview.get_selection().get_selected()[0] mName = mModel.get_value(mIter,0) mNextIter = self.lstore.iter_next(mIter) self.lstore.remove(mIter) # remove iter from list mStr = "Del: " + mName self.pushStatus("delTag",mStr) # highlight a tag in the list if mNextIter != None: self.tview.get_selection().select_iter(mNextIter) else: # highlight the last tag mLast = len(self.lstore) if mLast > 0: mLast = mLast - 1 self.tview.get_selection().select_path(mLast) elif data == 'clrTags': self.lstore.clear() self.pushStatus("clrTags",'Clear all tags') # Delete event def WinDelete_event(self, event, data=None): Gtk.main_quit() return False # row click or row change even in list def RowClick_event(self, selection, data=None): mModel = selection.get_selected()[0] # get tree selection mIter = selection.get_selected()[1] # get iter if mIter != None: mName = mModel.get_value(mIter,0) # get column 0 mIdx = mModel.get_path(mIter)[0] # get index in list self.entry.set_text(mName) mStr = 'Click: ' + str(mIdx) + ' Tag: ' + mName self.pushStatus("clickTag",mStr) self.entry.grab_focus() # push message to status bar def pushStatus(self, pCtxt, pMsg): mctxid = self.stsBar.get_context_id(pCtxt) self.stsBar.push(mctxid, pMsg) def main(): Gtk.main() if __name__ == "__main__": base = Base() main()