182 lines
5.1 KiB
Python
182 lines
5.1 KiB
Python
import curses
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import dbLayer as db
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from bookForm import bookForm
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class browserWindow:
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hl=0
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entries = []
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topline = 0
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# column definitions are in (label, weight, specified width) triples
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columnDefs = [('something',1,None)]
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mx = my = 0
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def clear(self):
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self.w.erase()
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self.w.refresh()
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def __init__(self,window):
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self.w = window
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self.updateGeometry()
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def sortByColumn(self, col):
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self.entries.sort() # key=dict.get(col))
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def updateGeometry(self):
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(self.my,self.mx)=self.w.getmaxyx()
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self.pageSize = self.my-3
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self.calcColWidths()
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def calcColWidths(self):
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total_weights = 0
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available_space = self.mx - len(self.columnDefs)
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cols = []
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for label,weight,value in self.columnDefs:
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if value!=None:
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available_space -= value
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else:
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total_weights+=weight
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for label,weight,value in self.columnDefs:
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if value!=None:
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cols.append((label,value))
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else:
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cols.append((label,available_space*weight/total_weights))
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self.columns=cols
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def refresh(self):
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self.displayHeader()
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for r in range(0,self.pageSize):
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self.displayRow(r)
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self.w.refresh()
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self.highlight()
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def displayHeader(self):
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cursor = 0
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for header,width in self.columns:
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self.w.addnstr(0,cursor,header,width)
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self.w.addstr(1,cursor,"-"*width)
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cursor += width+1
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def displayRow(self,row):
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if self.topline+row < len(self.entries):
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entry = self.entries[self.topline+row]
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cursor = 0
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for k,width in self.columns:
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if k.lower() in entry:
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self.w.addnstr(row+2,cursor,str(entry[k.lower()])+" "*width,width)
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cursor += width+1
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else:
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self.w.addstr(row+2,0," "*self.mx)
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def highlight(self):
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row = self.hl-self.topline+2
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if row > 1 and row < self.my:
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self.w.chgat(row,0,self.mx,curses.A_REVERSE)
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def unHighlight(self):
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row = self.hl-self.topline+2
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if row > 1 and row < self.my:
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self.w.chgat(row,0,self.mx,curses.A_NORMAL)
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def mvHighlight(self,delta):
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new = self.hl+delta
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new = max(new,0)
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new = min(new,len(self.entries)-1)
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self.unHighlight()
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self.hl = new
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self.highlight()
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def scroll(self,delta):
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self.unHighlight()
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self.topline += delta
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self.topline = max(self.topline,0)
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self.topline = min(self.topline,len(self.entries)-1)
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self.refresh()
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def eventLoop(self):
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self.w.keypad(1)
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self.refresh()
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ch = self.w.getch()
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while ch != 27 and ch != 113:
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self.handleInput(ch)
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self.w.refresh()
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ch = self.w.getch()
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def handleInput(self,ch):
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if ch == curses.KEY_UP:
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if self.hl == self.topline:
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self.scroll(-self.pageSize/2-1)
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self.mvHighlight(-1)
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elif ch == curses.KEY_DOWN:
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if self.hl == self.topline+self.pageSize-1:
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self.scroll(+self.pageSize/2+1)
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self.mvHighlight(+1)
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elif ch == curses.KEY_PPAGE:
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self.scroll(-self.pageSize)
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self.mvHighlight(-self.pageSize)
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elif ch == curses.KEY_NPAGE:
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self.scroll(+self.pageSize)
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self.mvHighlight(+self.pageSize)
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class bookBrowser(browserWindow):
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columnDefs = [('ID',0,3),
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('ISBN',0,13),
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('Authors',30,None),
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('Title',60,None)]
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# redefinable functions
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def updateSelection(self,book):
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bookid = book['id']
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w=curses.newwin(1,1,20,20)
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bf=bookForm(w)
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bf.caption='Update Book '+str(bookid)
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bf.blabel='update'
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bf.updateEntries(book)
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newbook = bf.eventLoop()
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if len(newbook)!=0:
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db.updateBook(newbook,bookid)
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bf.clear()
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def viewSelection(self,book):
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bookid = book['id']
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w=curses.newwin(1,1,20,20)
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bf = bookForm(w)
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bf.caption='Viewing Book '+str(bookid)
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bf.blabel='done'
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bf.updateEntries(book)
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bf.eventLoop()
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bf.clear()
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def refreshBooks(self):
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self.entries = db.getBooks()
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def handleInput(self,ch):
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browserWindow.handleInput(self,ch)
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if ch == 117: #update on 'u'
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book = self.entries[self.hl]
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self.updateSelection(entries)
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self.entries[self.hl]=db.getBookByID(book['id'])
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self.refresh()
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elif ch == 10:
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book = self.entries[self.hl]
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self.viewSelection(book)
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self.refresh()
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def categoryBrowser():
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columnDefs = [('ID',0,3),
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('Category',100,None)]
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def refreshCategories(self):
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self.entries = []
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cats = db.getCategories()
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for c in cats:
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self.entries.append({'category':c})
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def handleInput(self,ch):
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browserWindow.handleInput(self,ch)
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