| # srcwin.py -- a source listing window |
| |
| import stdwin |
| from stdwinevents import * |
| import basewin |
| |
| WIDTH = 40 |
| MAXHEIGHT = 24 |
| |
| class SourceWindow(basewin.BaseWindow): |
| |
| def init(self, filename): |
| self.filename = filename |
| # |
| f = open(self.filename, 'r') # raise exception if not found |
| self.contents = f.read() |
| f.seek(0) |
| self.linecount = len(f.readlines()) |
| f.close() |
| # |
| self.lineheight = lh = stdwin.lineheight() |
| self.leftmargin = stdwin.textwidth('00000000') |
| self.rightmargin = 30000 # Infinity |
| self.bottom = lh * self.linecount |
| # |
| stdwin.setdefwinpos(0, 0) |
| width = WIDTH*stdwin.textwidth('0') |
| height = lh*min(MAXHEIGHT, self.linecount) |
| stdwin.setdefwinsize(width, height) |
| self = basewin.BaseWindow.init(self, filename) |
| # |
| self.win.setdocsize(0, self.bottom + lh) |
| self.initeditor() |
| return self |
| |
| def initeditor(self): |
| r = (self.leftmargin, 0), (self.rightmargin, self.bottom) |
| self.editor = self.win.textcreate(r) |
| self.editor.settext(self.contents) |
| |
| def closeeditor(self): |
| self.editor.close() |
| |
| def reopen(self): |
| self.closeeditor() |
| basewin.BaseWindow.reopen(self) |
| self.initeditor() |
| |
| def close(self): |
| self.closeeditor() |
| basewin.BaseWindow.close(self) |
| |
| # Override this method to format line numbers differently |
| def getmark(self, lineno): |
| return `lineno` |
| |
| def dispatch(self, event): |
| if event[0] == WE_NULL: return # Dummy tested by mainloop |
| if event[0] == WE_DRAW or not self.editor.event(event): |
| basewin.BaseWindow.dispatch(self, event) |
| |
| def draw(self, detail): |
| dummy = self.editor.draw(detail) |
| # Draw line numbers |
| (left, top), (right, bottom) = detail |
| topline = top/self.lineheight |
| botline = bottom/self.lineheight + 1 |
| botline = min(self.linecount, botline) |
| d = self.win.begindrawing() |
| try: |
| h, v = 0, self.lineheight * topline |
| for lineno in range(topline+1, botline+1): |
| d.text((h, v), self.getmark(lineno)) |
| v = v + self.lineheight |
| finally: |
| d.close() |
| |
| def changemark(self, lineno): |
| left = 0 |
| top = (lineno-1) * self.lineheight |
| right = self.leftmargin |
| bottom = lineno * self.lineheight |
| d = self.win.begindrawing() |
| try: |
| d.erase((left, top), (right, bottom)) |
| d.text((left, top), self.getmark(lineno)) |
| finally: |
| d.close() |
| |
| def showline(self, lineno): |
| left = 0 |
| top = (lineno-1) * self.lineheight |
| right = self.leftmargin |
| bottom = lineno * self.lineheight |
| self.win.show((left, top), (right, bottom)) |
| |
| |
| TESTFILE = 'srcwin.py' |
| |
| def test(): |
| import mainloop |
| sw = SourceWindow().init(TESTFILE) |
| mainloop.mainloop() |