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 article_dialog as artd
   9 import biaweb_db
  10 import sys
  11
  12 class MainWindow (PyQt4.QtGui.QMainWindow, ui_main_window.Ui_MainWindow):
  13         def __init__ (self):
  14                 PyQt4.QtGui.QMainWindow.__init__ (self)
  15                 self.setupUi (self)
  16                 self.current_db = None
  17
  18         # refresh the category list
  19         def repopulate_categories (self):
  20                 recs = biaweb_db.get_categories (self.current_db)
  21                 if recs == False:
  22                         PyQt4.QtGui.QMessageBox.critical (self, "Error", "SQLite 3 error in getting the categories")
  23                         return
  24
  25                 self.categories.clear ()
  26                 for (id, name, desc, stub) in recs:
  27                         qrow = PyQt4.QtGui.QTreeWidgetItem ([str(id), str(name)])
  28                         self.categories.addTopLevelItem (qrow)
  29
  30         # refresh the articles list
  31         def repopulate_articles (self, catid=None):
  32                 recs = biaweb_db.get_articles (self.current_db, catid)
  33                 if recs == False:
  34                         PyQt4.QtGui.QMessageBox.critical (self, "Error", "SQLite 3 error in getting the articles")
  35                         return
  36
  37                 self.articles.clear ()
  38                 for item in recs:
  39                         qrow = PyQt4.QtGui.QTreeWidgetItem ([str(item[0]), str(item[1])])
  40                         self.articles.addTopLevelItem (qrow)
  41
  42         # when the view is refreshed
  43         def onViewRefresh (self):
  44                 if self.current_db is not None:
  45                         self.repopulate_categories ()
  46                         self.repopulate_articles ()
  47
  48         # when add article is triggered
  49         def onArticleAdd (self):
  50                 if self.current_db == None:
  51                         PyQt4.QtGui.QMessageBox.critical (self, "Error",
  52                                                         "Cannot create article. You need to create or open a website first")
  53                 else:
  54                         catid = self.get_selected_item_id (self.categories)
  55                         # if no category is selected
  56                         if catid is None:
  57                                 PyQt4.QtGui.QMessageBox.critical (self, "Error", "No category selected for article")
  58                                 return
  59                         artdlg = artd.ArticleDialog (self)
  60                         artdlg.exec_ ()
  61
  62
  63         # when edit article is triggered
  64         def onArticleEdit (self):
  65                 pass
  66
  67         # when delete article is triggered
  68         def onArticleDelete (self):
  69                 pass
  70
  71         # when item selection is changed in categories tree widget
  72         def onCategorySelectionChanged (self):
  73                 if self.current_db is not None:
  74                         catid = self.get_selected_item_id (self.categories)
  75                         self.repopulate_articles (catid)
  76
  77         # when configuration menu is activated
  78         def onConfiguration (self):
  79                 if self.current_db == None:
  80                         PyQt4.QtGui.QMessageBox.critical (self, "Error",
  81                                                         "Cannot edit configuration. You need to create or open a website first")
  82                 else:
  83                         dlg = scd.SiteConfigDialog (self)
  84                         configs = biaweb_db.get_configuration (self.current_db)
  85
  86                         if configs == False:
  87                                 PyQt4.QtGui.QMessageBox.critical (self, "Error", "SQLite 3 error in reading configuration")
  88                                 return
  89
  90                         # set the data
  91                         dlg.site_url.setText (configs[0])
  92                         dlg.site_title.setText (configs[1])
  93                         dlg.keywords.setText (configs[2])
  94                         dlg.description.setPlainText (configs[3])
  95                         dlg.num_rss_items.setValue (configs[4])
  96                         dlg.destination.setText (configs[5])
  97                         dlg.copyright.setText (configs[6])
  98
  99                         if (dlg.exec_ () == PyQt4.QtGui.QDialog.Accepted):
 100                                 # if accepted, get the data and store in database
 101                                 site_title = str (dlg.site_title.text ()).strip ()
 102                                 site_url = str (dlg.site_url.text ()).strip ()
 103                                 keywords = str (dlg.keywords.text ()).strip ()
 104                                 destination = str (dlg.destination.text ()).strip ()
 105                                 description = str (dlg.description.toPlainText ()).strip ()
 106                                 num_rss = dlg.num_rss_items.value ()
 107                                 copyright = str (dlg.copyright.text ()).strip ()
 108                                 # database update
 109                                 flag = biaweb_db.set_configuration (self.current_db, site_title, site_url, keywords, description,
 110                                                                                         copyright, num_rss, destination)
 111                                 if flag == False:
 112                                         PyQt4.QtGui.QMessageBox.critical (self, "Error",
 113                                                                                         "SQLite 3 error in updating configuration")
 114
 115         # function to get the category or article ID from current selected item in a tree widget
 116         def get_selected_item_id (self, twidget):
 117                 selitems = twidget.selectedItems ()
 118                 if selitems:
 119                         # get the first column data as integer
 120                         selindex = selitems[0].data(0, 0).toInt ()[0]
 121                         return selindex
 122                 else:
 123                         return None
 124
 125         # category edit action
 126         def onCategoryEdit (self):
 127                 # if no database is open
 128                 if self.current_db == None:
 129                         PyQt4.QtGui.QMessageBox.critical (self, "Error",
 130                                                         "Cannot edit category. You need to create or open a website first")
 131                 # database is open
 132                 else:
 133                         catid = self.get_selected_item_id (self.categories)
 134                         # if no category is selected, display an error
 135                         if catid is None:
 136                                 PyQt4.QtGui.QMessageBox.critical (self, "Error", "No category selected")
 137                         # category is selected
 138                         else:
 139                                 cat = biaweb_db.get_category (self.current_db, catid)
 140                                 # if the category cannot be retrieved from database
 141                                 if cat == False:
 142                                         PyQt4.QtGui.QMessageBox.critical (self, "Error", "SQLite 3 error reading category")
 143                                         return
 144
 145                                 # set the data in the dialog
 146                                 dlg = catd.CategoryDialog (self)
 147                                 dlg.category_name.setText (cat[1])
 148                                 dlg.category_desc.setText (cat[2])
 149                                 dlg.category_stub.setText (cat[3])
 150
 151                                 # if accepted
 152                                 if dlg.exec_ () == PyQt4.QtGui.QDialog.Accepted:
 153                                         category_name = str (dlg.category_name.text ()).strip ()
 154                                         category_desc = str (dlg.category_desc.text ()).strip ()
 155                                         category_stub = str (dlg.category_stub.text ()).strip ()
 156
 157                                         ret = biaweb_db.update_category (self.current_db,
 158                                                                                                 catid, category_name, category_desc, category_stub)
 159                                         if ret == True:
 160                                                 PyQt4.QtGui.QMessageBox.information (self, "Success", "Category successfully updated")
 161                                         else:
 162                                                 PyQt4.QtGui.QMessageBox.critical (self, "Error", "SQLite 3 error in updating category")
 163
 164
 165         # category delete action
 166         def onCategoryDelete (self):
 167                 # if there is no database
 168                 if self.current_db == None:
 169                         PyQt4.QtGui.QMessageBox.critical (self, "Error",
 170                                                                 "Cannot edit category. You need to create or open a website first")
 171                 else:
 172                         # get the selected category
 173                         catid = self.get_selected_item_id (self.categories)
 174                         if catid is None:
 175                                 PyQt4.QtGui.QMessageBox.critical (self, "Error", "No category selected")
 176                         # category is selected
 177                         else:
 178                                 # get confirmation first
 179                                 flag = PyQt4.QtGui.QMessageBox.question (self, "Confirm",
 180                         "This will delete the category and all associated articles. Are you sure you wish to continue?",
 181                         PyQt4.QtGui.QMessageBox.Yes, PyQt4.QtGui.QMessageBox.No)
 182                                 # if confirmed
 183                                 if flag == PyQt4.QtGui.QMessageBox.Yes:
 184                                         ret = biaweb_db.remove_category (self.current_db, catid)
 185                                         if ret == False:
 186                                                 PyQt4.QtGui.QMessageBox.critical (self, "Error", "SQLite 3 error in deleting category")
 187                                         else:
 188                                                 self.repopulate_categories ()
 189                                                 self.repopulate_articles ()
 190
 191         # category add action
 192         def onCategoryAdd (self):
 193                 # if there is no database
 194                 if self.current_db == None:
 195                         PyQt4.QtGui.QMessageBox.critical (self, "Error",
 196                                                         "Cannot add category. You need to create or open a website first")
 197                 else:
 198                         # show the category add dialog
 199                         dlg = catd.CategoryDialog (self)
 200                         # if OK button is pressed
 201                         if dlg.exec_ () == PyQt4.QtGui.QDialog.Accepted:
 202                                 cat_name = str (dlg.category_name.text ()).strip ()
 203                                 cat_desc = str (dlg.category_desc.text ()).strip ()
 204                                 cat_stub = str (dlg.category_stub.text ()).strip ()
 205                                 ret = biaweb_db.create_category (self.current_db, cat_name, cat_desc, cat_stub)
 206                                 if ret == True:
 207                                         PyQt4.QtGui.QMessageBox.information (self, "Success", "Category successfully created")
 208                                         self.repopulate_categories ()
 209                                         self.repopulate_articles ()
 210                                 else:
 211                                         PyQt4.QtGui.QMessageBox.critical (self, "Error", "SQLite 3 error in creating category")
 212
 213         # file open menu is clicked
 214         def onFileOpen (self):
 215                 filename = PyQt4.QtGui.QFileDialog.getOpenFileName (self, "Open Site Database")
 216                 if filename:
 217                         self.current_db = str (filename)
 218                         self.setWindowTitle ("BiaWeb - " + self.current_db)
 219                         self.repopulate_categories ()
 220                         self.repopulate_articles ()
 221
 222         # file new menu is clicked
 223         def onFileNew (self):
 224                 # show the site configuration dialog to get the new site details
 225                 dlg = scd.SiteConfigDialog (self)
 226                 # if OK button is pressed
 227                 if dlg.exec_ () == PyQt4.QtGui.QDialog.Accepted:
 228                         site_title = str (dlg.site_title.text ()).strip ()
 229                         site_url = str (dlg.site_url.text ()).strip ()
 230                         keywords = str (dlg.keywords.text ()).strip ()
 231                         destination = str (dlg.destination.text ()).strip ()
 232                         description = str (dlg.description.toPlainText ()).strip ()
 233                         num_rss = dlg.num_rss_items.value ()
 234                         copyright = str (dlg.copyright.text ()).strip ()
 235
 236                         savefilename = PyQt4.QtGui.QFileDialog.getSaveFileName (self, "Save site database to")
 237
 238                         if savefilename:
 239                                 self.current_db = str (savefilename)
 240                                 self.setWindowTitle ("BiaWeb - " + self.current_db)
 241                                 flag = biaweb_db.create_db (self.current_db, site_title, site_url, keywords, description,
 242                                                                 copyright, num_rss, destination)
 243                                 if flag == True:
 244                                         PyQt4.QtGui.QMessageBox.information (self, "Success",
 245                                                                                                                         "New site db successfully created")
 246                                         self.articles.clear ()
 247                                         self.categories.clear ()
 248                                 else:
 249                                         PyQt4.QtGui.QMessageBox.critical (self, "Error", "System or SQLite 3 error in creating database")
 250
 251         # file quit is clicked
 252         def onFileQuit (self):
 253                 sys.exit (0)