main_window.py

   1 # BiaWeb Website content manager (c) 2010 V.Harishankar
   2 # Main Window class
   3
   4 import PyQt4
   5 import ui_main_window
   6 import site_configuration_dialog as scd
   7 import category_dialog as catd
   8 import biaweb_db
   9 import sys
  10
  11 class MainWindow (PyQt4.QtGui.QMainWindow, ui_main_window.Ui_MainWindow):
  12         def __init__ (self):
  13                 PyQt4.QtGui.QMainWindow.__init__ (self)
  14                 self.setupUi (self)
  15                 self.current_db = None
  16
  17         # refresh the category list
  18         def repopulate_categories (self):
  19                 recs = biaweb_db.get_categories (self.current_db)
  20                 if recs == False:
  21                         PyQt4.QtGui.QMessageBox.critical (self, "Error", "SQLite 3 error in getting the categories")
  22                         return
  23
  24                 self.categories.clear ()
  25                 for (id, name, desc, stub) in recs:
  26                         qrow = PyQt4.QtGui.QTreeWidgetItem ([str(id), str(name)])
  27                         self.categories.addTopLevelItem (qrow)
  28
  29         # refresh the articles list
  30         def repopulate_articles (self, catid=None):
  31                 recs = biaweb_db.get_articles (self.current_db, catid)
  32                 if recs == False:
  33                         PyQt4.QtGui.QMessageBox.critical (self, "Error", "SQLite 3 error in getting the articles")
  34                         return
  35
  36                 self.articles.clear ()
  37                 for item in recs:
  38                         qrow = PyQt4.QtGui.QTreeWidgetItem ([str(item[0]), str(item[1])])
  39                         self.articles.addTopLevelItem (qrow)
  40
  41         # configuration dialog
  42         def onConfiguration (self):
  43                 if self.current_db == None:
  44                         PyQt4.QtGui.QMessageBox.critical (self, "Error",
  45                                                         "Cannot edit configuration. You need to create or open a website first")
  46                 else:
  47                         dlg = scd.SiteConfigDialog (self)
  48                         configs = biaweb_db.get_configuration (self.current_db)
  49
  50                         if configs == False:
  51                                 PyQt4.QtGui.QMessageBox.critical (self, "Error", "SQLite 3 error in reading configuration")
  52                                 return
  53
  54                         # set the data
  55                         dlg.site_url.setText (configs[0])
  56                         dlg.site_title.setText (configs[1])
  57                         dlg.keywords.setText (configs[2])
  58                         dlg.description.setPlainText (configs[3])
  59                         dlg.num_rss_items.setValue (configs[4])
  60                         dlg.destination.setText (configs[5])
  61                         dlg.copyright.setText (configs[6])
  62
  63                         if (dlg.exec_ () == PyQt4.QtGui.QDialog.Accepted):
  64                                 # if accepted, get the data and store in database
  65                                 site_title = str (dlg.site_title.text ()).strip ()
  66                                 site_url = str (dlg.site_url.text ()).strip ()
  67                                 keywords = str (dlg.keywords.text ()).strip ()
  68                                 destination = str (dlg.destination.text ()).strip ()
  69                                 description = str (dlg.description.toPlainText ()).strip ()
  70                                 num_rss = dlg.num_rss_items.value ()
  71                                 copyright = str (dlg.copyright.text ()).strip ()
  72                                 # database update
  73                                 flag = biaweb_db.set_configuration (self.current_db, site_title, site_url, keywords, description,
  74                                                                                         copyright, num_rss, destination)
  75                                 if flag == False:
  76                                         PyQt4.QtGui.QMessageBox.critical (self, "Error",
  77                                                                                         "SQLite 3 error in updating configuration")
  78
  79         # function to get the category or article ID from current selected item in a tree widget
  80         def get_selected_item_id (self, twidget):
  81                 selitems = twidget.selectedItems ()
  82                 if selitems:
  83                         # get the first column data as integer
  84                         selindex = selitems[0].data(0, 0).toInt ()[0]
  85                         return selindex
  86                 else:
  87                         return None
  88
  89         # category edit action
  90         def onCategoryEdit (self):
  91                 # if no database is open
  92                 if self.current_db == None:
  93                         PyQt4.QtGui.QMessageBox.critical (self, "Error",
  94                                                         "Cannot edit category. You need to create or open a website first")
  95                 # database is open
  96                 else:
  97                         catid = self.get_selected_item_id (self.categories)
  98                         # if no category is selected, display an error
  99                         if catid is None:
 100                                 PyQt4.QtGui.QMessageBox.critical (self, "Error", "No category selected")
 101                         # category is selected
 102                         else:
 103                                 cat = biaweb_db.get_category (self.current_db, catid)
 104                                 # if the category cannot be retrieved from database
 105                                 if cat == False:
 106                                         PyQt4.QtGui.QMessageBox.critical (self, "Error", "SQLite 3 error reading category")
 107                                         return
 108
 109                                 # set the data in the dialog
 110                                 dlg = catd.CategoryDialog (self)
 111                                 dlg.category_name.setText (cat[1])
 112                                 dlg.category_desc.setText (cat[2])
 113                                 dlg.category_stub.setText (cat[3])
 114
 115                                 # if accepted
 116                                 if dlg.exec_ () == PyQt4.QtGui.QDialog.Accepted:
 117                                         category_name = str (dlg.category_name.text ()).strip ()
 118                                         category_desc = str (dlg.category_desc.text ()).strip ()
 119                                         category_stub = str (dlg.category_stub.text ()).strip ()
 120
 121                                         ret = biaweb_db.update_category (self.current_db,
 122                                                                                                 catid, category_name, category_desc, category_stub)
 123                                         if ret == True:
 124                                                 PyQt4.QtGui.QMessageBox.information (self, "Success", "Category successfully updated")
 125                                         else:
 126                                                 PyQt4.QtGui.QMessageBox.critical (self, "Error", "SQLite 3 error in updating category")
 127
 128
 129         # category add action
 130         def onCategoryAdd (self):
 131                 # if there is no database
 132                 if self.current_db == None:
 133                         PyQt4.QtGui.QMessageBox.critical (self, "Error",
 134                                                         "Cannot add category. You need to create or open a website first")
 135                 else:
 136                         # show the category add dialog
 137                         dlg = catd.CategoryDialog (self)
 138                         # if OK button is pressed
 139                         if dlg.exec_ () == PyQt4.QtGui.QDialog.Accepted:
 140                                 cat_name = str (dlg.category_name.text ()).strip ()
 141                                 cat_desc = str (dlg.category_desc.text ()).strip ()
 142                                 cat_stub = str (dlg.category_stub.text ()).strip ()
 143                                 ret = biaweb_db.create_category (self.current_db, cat_name, cat_desc, cat_stub)
 144                                 if ret == True:
 145                                         PyQt4.QtGui.QMessageBox.information (self, "Success", "Category successfully created")
 146                                         self.repopulate_categories ()
 147                                         self.repopulate_articles ()
 148                                 else:
 149                                         PyQt4.QtGui.QMessageBox.critical (self, "Error", "SQLite 3 error in creating category")
 150
 151         # file open menu is clicked
 152         def onFileOpen (self):
 153                 filename = PyQt4.QtGui.QFileDialog.getOpenFileName (self, "Open Site Database")
 154                 if filename:
 155                         self.current_db = str (filename)
 156                         self.setWindowTitle ("BiaWeb - " + self.current_db)
 157                         self.repopulate_categories ()
 158                         self.repopulate_articles ()
 159
 160         # file new menu is clicked
 161         def onFileNew (self):
 162                 # show the site configuration dialog to get the new site details
 163                 dlg = scd.SiteConfigDialog (self)
 164                 # if OK button is pressed
 165                 if dlg.exec_ () == PyQt4.QtGui.QDialog.Accepted:
 166                         site_title = str (dlg.site_title.text ()).strip ()
 167                         site_url = str (dlg.site_url.text ()).strip ()
 168                         keywords = str (dlg.keywords.text ()).strip ()
 169                         destination = str (dlg.destination.text ()).strip ()
 170                         description = str (dlg.description.toPlainText ()).strip ()
 171                         num_rss = dlg.num_rss_items.value ()
 172                         copyright = str (dlg.copyright.text ()).strip ()
 173
 174                         savefilename = PyQt4.QtGui.QFileDialog.getSaveFileName (self, "Save site database to")
 175
 176                         if savefilename:
 177                                 self.current_db = str (savefilename)
 178                                 self.setWindowTitle ("BiaWeb - " + self.current_db)
 179                                 flag = biaweb_db.create_db (self.current_db, site_title, site_url, keywords, description,
 180                                                                 copyright, num_rss, destination)
 181                                 if flag == True:
 182                                         PyQt4.QtGui.QMessageBox.information (self, "Success",
 183                                                                                                                         "New site db successfully created")
 184                                         self.articles.clear ()
 185                                         self.categories.clear ()
 186                                 else:
 187                                         PyQt4.QtGui.QMessageBox.critical (self, "Error", "System or SQLite 3 error in creating database")
 188
 189         # file quit is clicked
 190         def onFileQuit (self):
 191                 sys.exit (0)