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added browser baseclass for inheritance purposes

This commit is contained in:
John Ladan 2012-03-22 14:46:21 -04:00
parent b363e70b5e
commit 415cadf47e
2 changed files with 66 additions and 67 deletions
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129
browser.py
View File

@ -4,7 +4,7 @@ from bookForm import bookForm
class browserWindow:
hl=0
books = []
entries = []
topline = 0
# column definitions are in (label, weight, specified width) triples
columnDefs = [('ID',0,3),
@ -13,51 +13,23 @@ class browserWindow:
('Title',60,None)]
mx = my = 0
# redefinable functions
def updateSelection(self,book):
bookid = book['id']
w=curses.newwin(1,1,20,20)
bf=bookForm(w)
bf.caption='Update Book '+str(bookid)
bf.blabel='update'
bf.updateEntries(book)
newbook = bf.eventLoop()
if len(newbook)!=0:
db.updateBook(newbook,bookid)
bf.clear()
def viewSelection(self,book):
bookid = book['id']
w=curses.newwin(1,1,20,20)
bf = bookForm(w)
bf.caption='Viewing Book '+str(bookid)
bf.blabel='done'
bf.updateEntries(book)
bf.eventLoop()
bf.clear()
def clear(self):
self.w.erase()
self.w.refresh()
def __init__(self,window):
self.w = window
self.updateGeometry()
self.calcColWidths()
self.refreshBooks()
def refreshBooks(self):
self.books = db.getBooks()
def sortByColumn(self, col):
self.books.sort() # key=dict.get(col))
self.entries.sort() # key=dict.get(col))
def updateGeometry(self):
(self.my,self.mx)=self.w.getmaxyx()
self.pageSize = self.my-3
# maybe recalculate column widths here.
self.calcColWidths()
def calcColWidths(self):
total_weights = 0
@ -91,12 +63,12 @@ class browserWindow:
cursor += width+1
def displayRow(self,row):
if self.topline+row < len(self.books):
book = self.books[self.topline+row]
if self.topline+row < len(self.entries):
entry = self.entries[self.topline+row]
cursor = 0
for k,width in self.columns:
if k.lower() in book:
self.w.addnstr(row+2,cursor,str(book[k.lower()])+" "*width,width)
if k.lower() in entry:
self.w.addnstr(row+2,cursor,str(entry[k.lower()])+" "*width,width)
cursor += width+1
else:
self.w.addstr(row+2,0," "*self.mx)
@ -114,7 +86,7 @@ class browserWindow:
def mvHighlight(self,delta):
new = self.hl+delta
new = max(new,0)
new = min(new,len(self.books)-1)
new = min(new,len(self.entries)-1)
self.unHighlight()
self.hl = new
self.highlight()
@ -123,47 +95,74 @@ class browserWindow:
self.unHighlight()
self.topline += delta
self.topline = max(self.topline,0)
self.topline = min(self.topline,len(self.books)-1)
self.topline = min(self.topline,len(self.entries)-1)
self.refresh()
def startBrowser(self):
def eventLoop(self):
self.w.keypad(1)
self.refresh()
ch = self.w.getch()
while ch != 27 and ch != 113:
if ch == curses.KEY_UP:
if self.hl == self.topline:
self.scroll(-self.pageSize/2-1)
self.mvHighlight(-1)
elif ch == curses.KEY_DOWN:
if self.hl == self.topline+self.pageSize-1:
self.scroll(+self.pageSize/2+1)
self.mvHighlight(+1)
elif ch == curses.KEY_PPAGE:
self.scroll(-self.pageSize)
self.mvHighlight(-self.pageSize)
elif ch == curses.KEY_NPAGE:
self.scroll(+self.pageSize)
self.mvHighlight(+self.pageSize)
elif ch == 117:
book = self.books[self.hl]
self.updateSelection(book)
self.books[self.hl]=db.getBookByID(book['id'])
self.refresh()
elif ch == 10:
book = self.books[self.hl]
self.viewSelection(book)
self.refresh()
self.handleInput(ch)
self.w.refresh()
ch = self.w.getch()
def handleInput(self,ch):
if ch == curses.KEY_UP:
if self.hl == self.topline:
self.scroll(-self.pageSize/2-1)
self.mvHighlight(-1)
elif ch == curses.KEY_DOWN:
if self.hl == self.topline+self.pageSize-1:
self.scroll(+self.pageSize/2+1)
self.mvHighlight(+1)
elif ch == curses.KEY_PPAGE:
self.scroll(-self.pageSize)
self.mvHighlight(-self.pageSize)
elif ch == curses.KEY_NPAGE:
self.scroll(+self.pageSize)
self.mvHighlight(+self.pageSize)
class bookBrowser(browserWindow):
# redefinable functions
def updateSelection(self,book):
bookid = book['id']
w=curses.newwin(1,1,20,20)
bf=bookForm(w)
bf.caption='Update Book '+str(bookid)
bf.blabel='update'
bf.updateEntries(book)
newbook = bf.eventLoop()
if len(newbook)!=0:
db.updateBook(newbook,bookid)
bf.clear()
def viewSelection(self,book):
bookid = book['id']
w=curses.newwin(1,1,20,20)
bf = bookForm(w)
bf.caption='Viewing Book '+str(bookid)
bf.blabel='done'
bf.updateEntries(book)
bf.eventLoop()
bf.clear()
def refreshBooks(self):
self.entries = db.getBooks()
def handleInput(self,ch):
browserWindow.handleInput(self,ch)
if ch == 117: #update on 'u'
book = self.entries[self.hl]
self.updateSelection(entries)
self.entries[self.hl]=db.getBookByID(book['id'])
self.refresh()
elif ch == 10:
book = self.entries[self.hl]
self.viewSelection(book)
self.refresh()

4
librarian.py
View File

@ -108,10 +108,10 @@ def deleteMenu():
def browseMenu():
(my,mx)=stdscr.getmaxyx()
w=curses.newwin(20,80,(my-20)/2,(mx-80)/2)
b = browser.browserWindow(w)
b = browser.bookBrowser(w)
hb.commands=browser_commands
hb.refresh()
b.startBrowser()
b.eventLoop()
b.clear()