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 not recs:
  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 not recs:
  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 is 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                         cats = biaweb_db.get_categories (self.current_db)
  61
  62                         artdlg.populate_categories (cats, catid)
  63
  64                         # if OK is pressed
  65                         if artdlg.exec_ () == PyQt4.QtGui.QDialog.Accepted:
  66                                 title = str (artdlg.article_title.text ()).strip ()
  67                                 keywords = str (artdlg.keywords.text ()).strip ()
  68                                 summary = str (artdlg.summary.toPlainText ()).strip ()
  69                                 content = str (artdlg.content.toPlainText ()).strip ()
  70                                 catid, ok = artdlg.category.itemData (artdlg.category.currentIndex ()).toInt ()
  71                                 # if catid is not an integer then abort
  72                                 if not ok:
  73                                         return
  74                                 rating = artdlg.rating.value ()
  75                                 stub = str (artdlg.stub.text ()).strip ()
  76
  77                                 ret = biaweb_db.create_article (self.current_db, title, summary, keywords, content, catid,
  78                                                                                                 stub, rating)
  79                                 if ret:
  80                                         PyQt4.QtGui.QMessageBox.information (self, "Success", "Article successfully created")
  81                                         self.repopulate_categories ()
  82                                         self.repopulate_articles (catid)
  83                                 else:
  84                                         PyQt4.QtGui.QMessageBox.critical (self, "Error", "SQLite 3 error in creating article")
  85
  86         # when edit article is triggered
  87         def onArticleEdit (self):
  88                 pass
  89
  90         # when delete article is triggered
  91         def onArticleDelete (self):
  92                 if self.current_db is None:
  93                         PyQt4.QtGui.QMessageBox.critical (self, "Error",
  94                                                         "Cannot delete article. You need to create or open a website first")
  95                 else:
  96                         # get the selected article
  97                         artid = self.get_selected_item_id (self.articles)
  98                         catid = self.get_selected_item_id (self.categories)
  99                         if artid is None:
 100                                 PyQt4.QtGui.QMessageBox.critical (self, "Error", "No article selected")
 101                                 return
 102                         # get confirmation on delete
 103                         conf = PyQt4.QtGui.QMessageBox.question (self, "Confirm",
 104                                                         "Are you sure you wish to delete the selected article?",
 105                                                         PyQt4.QtGui.QMessageBox.Yes, PyQt4.QtGui.QMessageBox.No)
 106                         # confirmed
 107                         if conf == PyQt4.QtGui.QMessageBox.Yes:
 108                                 ret = biaweb_db.delete_article (self.current_db, artid)
 109                                 if not ret:
 110                                         PyQt4.QtGui.QMessageBox.critical (self, "Error", "SQLite 3 error in deleting article")
 111                                 else:
 112                                         self.repopulate_articles (catid)
 113
 114         # when category item is activated
 115         def onCategoryItemActivated (self):
 116                 self.onCategoryEdit ()
 117
 118         # when article item is activated
 119         def onArticleItemActivated (self):
 120                 self.onArticleEdit ()
 121
 122         # when item selection is changed in categories tree widget
 123         def onCategorySelectionChanged (self):
 124                 if self.current_db is not None:
 125                         catid = self.get_selected_item_id (self.categories)
 126                         self.repopulate_articles (catid)
 127
 128         # when configuration menu is activated
 129         def onConfiguration (self):
 130                 if self.current_db is None:
 131                         PyQt4.QtGui.QMessageBox.critical (self, "Error",
 132                                                         "Cannot edit configuration. You need to create or open a website first")
 133                 else:
 134                         dlg = scd.SiteConfigDialog (self)
 135                         configs = biaweb_db.get_configuration (self.current_db)
 136
 137                         if not configs:
 138                                 PyQt4.QtGui.QMessageBox.critical (self, "Error", "SQLite 3 error in reading configuration")
 139                                 return
 140
 141                         # set the data
 142                         dlg.site_url.setText (configs[0])
 143                         dlg.site_title.setText (configs[1])
 144                         dlg.keywords.setText (configs[2])
 145                         dlg.description.setPlainText (configs[3])
 146                         dlg.num_rss_items.setValue (configs[4])
 147                         dlg.destination.setText (configs[5])
 148                         dlg.copyright.setText (configs[6])
 149
 150                         if (dlg.exec_ () == PyQt4.QtGui.QDialog.Accepted):
 151                                 # if accepted, get the data and store in database
 152                                 site_title = str (dlg.site_title.text ()).strip ()
 153                                 site_url = str (dlg.site_url.text ()).strip ()
 154                                 keywords = str (dlg.keywords.text ()).strip ()
 155                                 destination = str (dlg.destination.text ()).strip ()
 156                                 description = str (dlg.description.toPlainText ()).strip ()
 157                                 num_rss = dlg.num_rss_items.value ()
 158                                 copyright = str (dlg.copyright.text ()).strip ()
 159                                 # database update
 160                                 flag = biaweb_db.set_configuration (self.current_db, site_title, site_url, keywords, description,
 161                                                                                         copyright, num_rss, destination)
 162                                 if not flag:
 163                                         PyQt4.QtGui.QMessageBox.critical (self, "Error",
 164                                                                                         "SQLite 3 error in updating configuration")
 165
 166         # function to get the category or article ID from current selected item in a tree widget
 167         def get_selected_item_id (self, twidget):
 168                 selitems = twidget.selectedItems ()
 169                 if selitems:
 170                         # get the first column data as integer
 171                         selindex = selitems[0].data(0, 0).toInt ()[0]
 172                         return selindex
 173                 else:
 174                         return None
 175
 176         # category edit action
 177         def onCategoryEdit (self):
 178                 # if no database is open
 179                 if self.current_db is None:
 180                         PyQt4.QtGui.QMessageBox.critical (self, "Error",
 181                                                         "Cannot edit category. You need to create or open a website first")
 182                 # database is open
 183                 else:
 184                         catid = self.get_selected_item_id (self.categories)
 185                         # if no category is selected, display an error
 186                         if catid is None:
 187                                 PyQt4.QtGui.QMessageBox.critical (self, "Error", "No category selected")
 188                         # category is selected
 189                         else:
 190                                 cat = biaweb_db.get_category (self.current_db, catid)
 191                                 # if the category cannot be retrieved from database
 192                                 if not cat:
 193                                         PyQt4.QtGui.QMessageBox.critical (self, "Error", "SQLite 3 error reading category")
 194                                         return
 195
 196                                 # set the data in the dialog
 197                                 dlg = catd.CategoryDialog (self)
 198                                 dlg.category_name.setText (cat[1])
 199                                 dlg.category_desc.setText (cat[2])
 200                                 dlg.category_stub.setText (cat[3])
 201
 202                                 # if accepted
 203                                 if dlg.exec_ () == PyQt4.QtGui.QDialog.Accepted:
 204                                         category_name = str (dlg.category_name.text ()).strip ()
 205                                         category_desc = str (dlg.category_desc.text ()).strip ()
 206                                         category_stub = str (dlg.category_stub.text ()).strip ()
 207
 208                                         ret = biaweb_db.update_category (self.current_db,
 209                                                                                                 catid, category_name, category_desc, category_stub)
 210                                         if ret:
 211                                                 PyQt4.QtGui.QMessageBox.information (self, "Success", "Category successfully updated")
 212                                                 self.repopulate_categories ()
 213                                         else:
 214                                                 PyQt4.QtGui.QMessageBox.critical (self, "Error", "SQLite 3 error in updating category")
 215
 216
 217         # category delete action
 218         def onCategoryDelete (self):
 219                 # if there is no database
 220                 if self.current_db is None:
 221                         PyQt4.QtGui.QMessageBox.critical (self, "Error",
 222                                                                 "Cannot delete category. You need to create or open a website first")
 223                 else:
 224                         # get the selected category
 225                         catid = self.get_selected_item_id (self.categories)
 226                         if catid is None:
 227                                 PyQt4.QtGui.QMessageBox.critical (self, "Error", "No category selected")
 228                         # category is selected
 229                         else:
 230                                 # get confirmation first
 231                                 flag = PyQt4.QtGui.QMessageBox.question (self, "Confirm",
 232                         "This will delete the category and all associated articles. Are you sure you wish to continue?",
 233                         PyQt4.QtGui.QMessageBox.Yes, PyQt4.QtGui.QMessageBox.No)
 234                                 # if confirmed
 235                                 if flag == PyQt4.QtGui.QMessageBox.Yes:
 236                                         ret = biaweb_db.remove_category (self.current_db, catid)
 237                                         if not ret:
 238                                                 PyQt4.QtGui.QMessageBox.critical (self, "Error", "SQLite 3 error in deleting category")
 239                                         else:
 240                                                 self.repopulate_categories ()
 241                                                 self.repopulate_articles ()
 242
 243         # category add action
 244         def onCategoryAdd (self):
 245                 # if there is no database
 246                 if self.current_db is None:
 247                         PyQt4.QtGui.QMessageBox.critical (self, "Error",
 248                                                         "Cannot add category. You need to create or open a website first")
 249                 else:
 250                         # show the category add dialog
 251                         dlg = catd.CategoryDialog (self)
 252                         # if OK button is pressed
 253                         if dlg.exec_ () == PyQt4.QtGui.QDialog.Accepted:
 254                                 cat_name = str (dlg.category_name.text ()).strip ()
 255                                 cat_desc = str (dlg.category_desc.text ()).strip ()
 256                                 cat_stub = str (dlg.category_stub.text ()).strip ()
 257                                 ret = biaweb_db.create_category (self.current_db, cat_name, cat_desc, cat_stub)
 258                                 if ret:
 259                                         PyQt4.QtGui.QMessageBox.information (self, "Success", "Category successfully created")
 260                                         self.repopulate_categories ()
 261                                         self.repopulate_articles ()
 262                                 else:
 263                                         PyQt4.QtGui.QMessageBox.critical (self, "Error", "SQLite 3 error in creating category")
 264
 265         # file open menu is clicked
 266         def onFileOpen (self):
 267                 filename = PyQt4.QtGui.QFileDialog.getOpenFileName (self, "Open Site Database")
 268                 if filename:
 269                         self.current_db = str (filename)
 270                         self.setWindowTitle ("BiaWeb - " + self.current_db)
 271                         self.repopulate_categories ()
 272                         self.repopulate_articles ()
 273
 274         # file new menu is clicked
 275         def onFileNew (self):
 276                 # show the site configuration dialog to get the new site details
 277                 dlg = scd.SiteConfigDialog (self)
 278                 # if OK button is pressed
 279                 if dlg.exec_ () == PyQt4.QtGui.QDialog.Accepted:
 280                         site_title = str (dlg.site_title.text ()).strip ()
 281                         site_url = str (dlg.site_url.text ()).strip ()
 282                         keywords = str (dlg.keywords.text ()).strip ()
 283                         destination = str (dlg.destination.text ()).strip ()
 284                         description = str (dlg.description.toPlainText ()).strip ()
 285                         num_rss = dlg.num_rss_items.value ()
 286                         copyright = str (dlg.copyright.text ()).strip ()
 287
 288                         savefilename = PyQt4.QtGui.QFileDialog.getSaveFileName (self, "Save site database to")
 289
 290                         if savefilename:
 291                                 self.current_db = str (savefilename)
 292                                 self.setWindowTitle ("BiaWeb - " + self.current_db)
 293                                 flag = biaweb_db.create_db (self.current_db, site_title, site_url, keywords, description,
 294                                                                 copyright, num_rss, destination)
 295                                 if flag:
 296                                         PyQt4.QtGui.QMessageBox.information (self, "Success",
 297                                                                                                                         "New site db successfully created")
 298                                         self.articles.clear ()
 299                                         self.categories.clear ()
 300                                 else:
 301                                         PyQt4.QtGui.QMessageBox.critical (self, "Error", "System or SQLite 3 error in creating database")
 302
 303         # file quit is clicked
 304         def onFileQuit (self):
 305                 sys.exit (0)