Capturing Button Methods from a second Form using PyQT - qt

Question

I am super new to PyQT ... I am using QT Designer for my forms. I am confused about where to put my event handling for the second form in my project.
I have the following .py files :
main.py
Ui_make_render_folders.py (generated from the Qt designer ui file)
Ui_prefs.py (generated from the Qt designer ui file)
Mainwindow.py (this is where all the even handling for the main form
lives)
icons_rc.py (resource file)
make_render_folders.py (where all my custom functions live)
Here is a picture of the script running :
click to see script running << CLICK HERE
My question is ... where does the even handling for my prefs window go ???? I cant figure out where to put my [b]on_btn_released() for the buttons on y 2nd form.[/b] Also I am not sure I am instantiating that dialog properly. Currently I am adding this code to the top of my MainWindow.py.
Finally what does #pyqSignature("") do ? And do I need it ?
"""
This is where all teh MainWindow logic sits
"""
import os
import os.path
from PyQt4.QtGui import QMainWindow, QFileDialog, QTreeWidgetItem, QDialog
from PyQt4.QtCore import pyqtSignature, QString
from make_folders import make_render_folders
from Ui_make_render_folders import Ui_MainWindow
from Ui_prefs import Ui_prefs
class Prefs(QDialog, Ui_prefs):
def __init__(self, parent = None):
QDialog.__init__(self, parent)
self.setupUi(self)
#pyqtSignature("")
def on_btn_get_ref_dir_released(self):
print '2nd form'
class MainWindow(QMainWindow, Ui_MainWindow):
def __init__(self, parent = None):
"""
Constructor
"""
QMainWindow.__init__(self, parent)
self.setupUi(self)
self.prefs = QDialog()
ui = Ui_prefs()
ui.setupUi(self.prefs)
#pyqtSignature("")
def on_btn_process_released(self):
print 'process'
no_of_shots = self.spn_no_of_shots.value()
#spot_path = self.le_proj_path.text()+'\\'+self.lst_spots.selectedItems()[0].text()
spot_path_string = 'self.le_proj_path.text())+os.sep,'
spot_path_string += str(self.lst_spots.selectedItems()[0].text())
os.path.join(spot_path_string)
save_position = self.lst_spots.selectedItems()[0]
if no_of_shots > 0:
if self.cmb_mode.currentText() == 'Create Shots':
print ('creating shots')
for x in range(1, no_of_shots+1):
make_render_folders.create_shot_folder(spot_path, x)
else:
print ('inserting shots')
if self.lst_shots.count() > 0:
t =self.lst_shots.selectedItems()[0].text()
cur_shot = t[2:]
cur_shot_val = int(cur_shot)
cur_index = self.lst_shots.currentRow()
print('sel_value :'+cur_shot)
print('sel_index :'+str(cur_index))
next_shot_index = int(cur_index)+1
print('nextshot_index ='+str(next_shot_index))
next_shot_text = self.lst_shots.item(next_shot_index).text()
next_shot_val = int(next_shot_text[2:])
print('nextshot value ='+str(next_shot_val))
insert_space = next_shot_val - cur_shot_val
print(str(insert_space))
if no_of_shots > (insert_space-1) :
print "not enough space - please reduce shots to insert"
else:
print('insert the shots')
for x in range(cur_shot_val,(cur_shot_val+no_of_shots) ):
print (str(x))
make_render_folders.insert_shot_folder(spot_path, x+1)
make_render_folders.populate_shot_list(self)
self.lst_shots.setCurrentRow(0)
#pyqtSignature("")
def on_btn_quit_released(self):
print 'quit'
self.close()
#pyqtSignature("")
def on_cmb_mode_currentIndexChanged(self, ret_text):
print ret_text
#pyqtSignature("")
def on_le_proj_path_editingFinished(self):
print "editingFinished le_proj_path"
def on_le_new_spot_name_textChanged(self):
if len(self.le_new_spot_name.text()) > 0 :
self.btn_add_spot.setEnabled(True)
else :
self.btn_add_spot.setEnabled(False)
#pyqtSignature("")
def on_btn_add_spot_released(self):
v_NewSpotFolder = self.le_new_spot_name.text()
v_rPath = self.le_proj_path.text()
x = make_render_folders.create_spot_folder(v_NewSpotFolder,v_rPath)
if x :
self.le_new_spot_name.clear()
make_render_folders.populate_spots_list(self)
#pyqtSignature("")
def on_actionLoad_Project_triggered(self):
print "actionLoad_Project"
self.lst_shots.clear()
self.lst_spots.clear()
proj_dir = str(QFileDialog.getExistingDirectory(self, 'Select Project'))
print proj_dir
if os.path.exists(proj_dir):
print 'the file is there'
elif os.access(os.path.dirname(proj_dir), os.W_OK):
print 'the file does not exists but write privileges are given'
else:
print 'can not write there'
p = os.path.join(proj_dir+os.sep,'renders')
self.le_proj_path.setText(p)
make_render_folders.populate_spots_list(self)
#pyqtSignature("")
def on_actionConfig_triggered(self):
print "config"
self.prefs.show()
#pyqtSignature("")
def on_actionQuit_triggered(self):
print "ActionQuit"
#pyqtSignature("")
def on_btn_get_folders_released(self):
make_render_folders.populate_spots_list(self)
def on_lst_spots_itemClicked (self):
print "got you"
self.lst_shots.clear()
make_render_folders.populate_shot_list(self)
Thanks !!!

Answer 1

Event handling for the Prefs window can go anywhere. Personally I always prefer to give each window its own file.
So the py files would look something like:
Mainwindow.py (Main form events etc)
Ui_make_render_folders.py (Qt Designer generated UI)
prefs.py (Prefs form events etc)
ui_prefs.py (Qt Designer generated UI)
your other files...
Initialisation: (MainWindow.py)
from PyQt4.QtGui import QMainWindow
from Ui_make_render_folders import Ui_MainWindow
#prefs here refers to the file: prefs.py. PrefWindow is the class within this file.
from prefs import PrefWindow
class MainWindow(QMainWindow):
def __init__(self, parent=None):
#Better way to initialise
super(MainWindow, self).__init__(parent)
self.main = Ui_MainWindow()
self.main.setupUi(self)
#initialise prefs to variable
self.prefs = PrefWindow(self)
# Rest of init...
Note: initialising of second form will be similar to above.
You should place all events for prefs form within its class.
From the function that calls Prefs:
#pyqtSlot()
def on_actionConfig_triggered(self):
print "config"
self.prefs.exec_() # Will block main window while its open.
# Use self.prefs.show() if you want user to be able to interact with main window
Finally: pyqtSignature
On http://pyqt.sourceforge.net/Docs/PyQt4/old_style_signals_slots.html it states that:
'The QtCore.pyqtSignature() serves the same purpose as the pyqtSlot() decorator but has a less Pythonic API.'
Better to use pyqtSlot()