293 lines
8.3 KiB
Python
293 lines
8.3 KiB
Python
import curses
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import sys
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class textEntry:
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cursor = 0
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start = 0
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focus = False
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x = 0
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y = 0
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width = 10
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value = ""
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def __init__(self, parent_window, value=""):
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self.w = parent_window
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self.value = value
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def setGeom(self,y,x,width):
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self.x = x
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self.y = y
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self.width = width
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def redraw(self):
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self.w.addnstr(self.y,self.x, self.value[self.start:]+" "*self.width, self.width)
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if self.focus:
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self.w.chgat(self.y, self.x, self.width, curses.A_UNDERLINE)
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curses.curs_set(1)
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def gainFocus(self):
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sys.stderr.write('I have focus!\n')
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self.focus = True
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self.mvCursor(+len(self.value))
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self.start = max(0,self.cursor-self.width)
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self.redraw()
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def loseFocus(self):
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self.focus = False
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self.cursor = 0
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self.start = 0
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self.redraw()
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def mvCursor(self,delta):
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n = self.cursor + delta
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# make sure new position is legal
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n = max(n,0)
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n = min(n,len(self.value))
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self.cursor = n
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self.start = max(0,self.cursor-self.width+1)
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self.redraw()
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col = self.x + self.cursor - self.start
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self.w.move(self.y,col)
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def insert(self,ch):
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c = self.cursor
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self.value = self.value[:c] +ch+ self.value[c:]
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self.mvCursor(+1)
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def backspace(self):
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if self.cursor>0:
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c = self.cursor
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self.value=self.value[:c-1] + self.value[c:]
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self.mvCursor(-1)
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def delete(self):
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c = self.cursor
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self.value = self.value[:c] + self.value[c+1:]
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self.mvCursor(0)
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def handle_input(self,ch):
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if ch==curses.KEY_LEFT:
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self.mvCursor(-1)
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elif ch==curses.KEY_HOME:
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self.mvCursor(-len(self.value))
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elif ch==curses.KEY_RIGHT:
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self.mvCursor(+1)
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elif ch==curses.KEY_END:
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self.mvCursor(+len(self.value))
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elif ch>=32 and ch<=126:
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self.insert(curses.keyname(ch))
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elif ch==curses.KEY_BACKSPACE:
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self.backspace()
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elif ch==curses.KEY_DC:
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self.delete()
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class formWindow:
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mx = my = 0
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hl = 0
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bt = -1
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left = 0
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top = 2
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row = 2
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caption = "Form"
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blabel = "Done"
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labels = ["label1"]
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entries=[]
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commands = [('pU', 'top'),('pD', 'bottom'),('Es', 'cancel')]
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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,helpbar,book={}):
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self.w = window
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self.w.resize(len(self.labels)+6,50)
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self.hb = helpbar
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self.makeEntries()
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self.updateGeometry()
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self.updateEntries(book)
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def makeEntries(self):
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for e in range(len(self.labels)):
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self.entries.append(textEntry(self.w))
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def updateGeometry(self):
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(self.my, self.mx) = self.w.getmaxyx()
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self.left=0
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for l in self.labels:
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self.left = max(len(l),self.left)
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self.left += 4
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width = self.mx-self.left-2
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self.top = 2
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for r in range(len(self.entries)):
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self.entries[r].setGeom(r+self.top, self.left, width)
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# next, the buttons
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self.brow = self.top+len(self.labels)+1
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self.bcol = [self.mx-len(self.blabel)-14, self.mx-len(self.blabel)-4]
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self.bwidth = [8,len(self.blabel)+2]
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def updateEntries(self,book):
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e = 0
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for l in self.labels:
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sys.stderr.write('updating label: '+l+'\n')
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if l.lower() in book:
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sys.stderr.write(' '+l+' found\n')
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self.entries[e].value = str(book[l.lower()])
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else:
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sys.stderr.write(' '+l+' notfound\n')
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self.entries[e].value = ""
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e += 1
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def redraw(self):
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self.w.box()
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self.w.addstr(0,(self.mx-len(self.caption))//2,self.caption)
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r=0
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for l in self.labels:
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c = self.left-len(l)-2
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self.w.addstr(r+self.top,c,l+":")
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self.entries[r].redraw()
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r+=1
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self.w.addstr(self.brow,self.bcol[0], "<cancel> <"+self.blabel+">")
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self.w.refresh()
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def refresh(self):
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self.hb.commands = self.commands
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self.hb.refresh()
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self.updateGeometry()
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self.redraw()
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def highlightButton(self):
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self.w.chgat(self.brow, self.bcol[self.bt], self.bwidth[self.bt], curses.A_REVERSE)
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curses.curs_set(0)
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def unHighlightButton(self):
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self.w.chgat(self.brow,1,self.mx-2,curses.A_NORMAL)
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def mvFocus(self,delta):
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if self.bt==-1:
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self.entries[self.hl].loseFocus()
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else:
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self.unHighlightButton()
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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.labels)) # the extra is for the buttons
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self.hl = new
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if new == len(self.labels):
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self.bt = 1
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self.bt = min(self.bt,1)
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self.highlightButton()
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else:
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self.bt=-1
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self.entries[self.hl].gainFocus()
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def returnValues(self):
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book = {}
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for k,e in zip(self.labels, self.entries):
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if v!="" and k.lower()!="publish date":
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book[k.lower()]=e.value
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return book
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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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self.hl=0;
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self.entries[self.hl].gainFocus()
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ch = self.w.getch()
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while ch != 27:
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self.handleInput(ch)
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if ch==10 or ch==curses.KEY_ENTER:
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if self.bt==0:
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return {}
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elif self.bt==1:
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return self.returnValues()
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else:
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self.mvFocus(+1)
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self.w.refresh()
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ch = self.w.getch()
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curses.curs_set(0)
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return {}
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def handleInput(self,ch):
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if ch==curses.KEY_UP:
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self.mvFocus(-1)
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elif ch==curses.KEY_PPAGE:
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self.mvFocus(-len(self.labels))
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elif ch==curses.KEY_DOWN:
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self.mvFocus(+1)
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elif ch==curses.KEY_NPAGE:
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self.mvFocus(+len(self.labels))
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elif ch==curses.KEY_LEFT:
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if self.bt==-1:
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self.entries[self.hl].handle_input(ch)
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else:
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self.unHighlightButton()
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self.bt=0
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self.highlightButton()
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elif ch==curses.KEY_HOME:
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if self.bt==-1:
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self.mvCursor(-len(self.entries[self.hl]))
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elif ch==curses.KEY_RIGHT:
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if self.bt==-1:
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self.entries[self.hl].handle_input(ch)
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else:
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self.unHighlightButton()
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self.bt=1
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self.highlightButton()
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else:
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if self.bt==-1:
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self.entries[self.hl].handle_input(ch)
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class bookForm(formWindow):
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caption = "Add a Book"
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blabel = "Add"
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labels = ["ISBN", "LCCN", "Title", "Subtitle", "Authors", "Edition",
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"Publisher", "Publish Date", "Publish Year", "Publish Month", "Publish location",
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"Pages", "Pagination", "Weight"]
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# redefineable functions lookup is called when 'enter' is pressed on ISBN
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# and returns the looked-up book. Default returns nothing
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def lookup_isbn(self,isbn):
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return {'isbn':isbn}
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def lookup_lccn(self,lccn):
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return {'lccn':lccn}
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def returnBook(self):
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return self.returnValues()
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def handleInput(self,ch):
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if ch==10 or ch==curses.KEY_ENTER:
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if self.hl==0: # lookup by isbn
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book = self.lookup_isbn(self.entries[0].value)
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if book != {}:
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sys.stderr.write('updating entries\n')
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self.updateEntries(book)
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self.refresh()
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self.mvFocus(+7)
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if self.hl==1: # lookup by lccn
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book = self.lookup_lccn(self.entries[1].value)
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if book != {}:
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self.updateEntries(book)
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self.refresh()
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self.mvFocus(+6)
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else:
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formWindow.handleInput(self,ch)
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class categoryForm(formWindow):
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caption = "Add a Category"
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blabel = "Add"
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labels = ["Category"]
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def returnValues(self):
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return self.entries
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