# Allow user to move the current selection. # Author: Andrew Trevorrow (andrew@trevorrow.com), Jan 2011. import golly as g # set edges of bounded grid for later use if g.getwidth() > 0: gridl = -int(g.getwidth()/2) gridr = gridl + g.getwidth() - 1 if g.getheight() > 0: gridt = -int(g.getheight()/2) gridb = gridt + g.getheight() - 1 # -------------------------------------------------------------------- def showhelp(): g.note( """Alt-clicking in the selection allows you to COPY it to another location (the original selection is not deleted). While moving the selection the following keys can be used: x - flip selection left-right y - flip selection top-bottom > - rotate selection clockwise < - rotate selection anticlockwise h - show this help escape - abort and restore the selection""") # ------------------------------------------------------------------------------ def cellinrect(x, y, r): # return True if given cell position is inside given rectangle if x < r[0] or x >= r[0] + r[2]: return False if y < r[1] or y >= r[1] + r[3]: return False return True # ------------------------------------------------------------------------------ def rectingrid(r): # return True if all of given rectangle is inside grid if g.getwidth() > 0 and (r[0] < gridl or r[0] + r[2] - 1 > gridr): return False if g.getheight() > 0 and (r[1] < gridt or r[1] + r[3] - 1 > gridb): return False return True # ------------------------------------------------------------------------------ def lookforkeys(event, deltax, deltay): global oldcells, selrect, selpatt # look for keys used to flip/rotate selection if event == "key x none" or event == "key y none": # flip floating selection left-right or top-bottom if len(oldcells) > 0: g.clear(0) g.putcells(selpatt, deltax, deltay) if " x " in event: g.flip(0) else: g.flip(1) selpatt = g.transform(g.getcells(selrect), -deltax, -deltay) if len(oldcells) > 0: g.clear(0) g.putcells(oldcells) g.putcells(selpatt, deltax, deltay) g.update() return if event == "key > none" or event == "key < none": # rotate floating selection clockwise or anticlockwise; # because we use g.rotate below we have to use the exact same # calculation (see Selection::Rotate in wxselect.cpp) for rotrect: midx = selrect[0] + int((selrect[2]-1)/2) midy = selrect[1] + int((selrect[3]-1)/2) newleft = midx + selrect[1] - midy newtop = midy + selrect[0] - midx rotrect = [ newleft, newtop, selrect[3], selrect[2] ] if not rectingrid(rotrect): g.show("Rotation is not allowed if selection would be outside grid.") return g.clear(0) if len(oldcells) > 0: g.putcells(oldcells) oldcells = g.join(oldcells, g.getcells(rotrect)) g.clear(0) g.select(rotrect) g.clear(0) g.select(selrect) g.putcells(selpatt, deltax, deltay) if " > " in event: g.rotate(0) else: g.rotate(1) selrect = g.getselrect() selpatt = g.transform(g.getcells(selrect), -deltax, -deltay) if len(oldcells) > 0: g.clear(0) g.putcells(oldcells) g.putcells(selpatt, deltax, deltay) g.update() return if event == "key h none": # best not to show Help window while dragging selection! return g.doevent(event) # ------------------------------------------------------------------------------ def moveselection(): global oldcells, selrect, selpatt # wait for click in selection while True: event = g.getevent() if event.startswith("click"): # event is a string like "click 10 20 left none" evt, xstr, ystr, butt, mods = event.split() x = int(xstr) y = int(ystr) if cellinrect(x, y, selrect): oldmouse = xstr + ' ' + ystr firstx = x firsty = y xoffset = firstx - selrect[0] yoffset = firsty - selrect[1] if mods == "alt": # don't delete pattern in selection oldcells = g.getcells(selrect) break elif event == "key h none": showhelp() else: g.doevent(event) # wait for mouse-up while moving selection g.show("Move mouse and release button...") mousedown = True while mousedown: event = g.getevent() if event.startswith("mup"): mousedown = False elif len(event) > 0: lookforkeys(event, x - firstx, y - firsty) # update xoffset,yoffset in case selection was rotated xoffset = x - selrect[0] yoffset = y - selrect[1] mousepos = g.getxy() if len(mousepos) > 0 and mousepos != oldmouse: # mouse has moved, so move selection rect and pattern g.clear(0) if len(oldcells) > 0: g.putcells(oldcells) xstr, ystr = mousepos.split() x = int(xstr) y = int(ystr) selrect[0] = x - xoffset selrect[1] = y - yoffset if g.getwidth() > 0: # ensure selrect doesn't move beyond left/right edge of grid if selrect[0] < gridl: selrect[0] = gridl x = selrect[0] + xoffset elif selrect[0] + selrect[2] - 1 > gridr: selrect[0] = gridr + 1 - selrect[2] x = selrect[0] + xoffset if g.getheight() > 0: # ensure selrect doesn't move beyond top/bottom edge of grid if selrect[1] < gridt: selrect[1] = gridt y = selrect[1] + yoffset elif selrect[1] + selrect[3] - 1 > gridb: selrect[1] = gridb + 1 - selrect[3] y = selrect[1] + yoffset g.select(selrect) oldcells = g.getcells(selrect) g.putcells(selpatt, x - firstx, y - firsty) oldmouse = mousepos g.update() # ------------------------------------------------------------------------------ selrect = g.getselrect() if len(selrect) == 0: g.exit("There is no selection.") selpatt = g.getcells(selrect) # remember initial selection in case user aborts script firstrect = g.getselrect() firstpatt = g.getcells(selrect) g.show("Click anywhere in selection, move mouse and release button... (hit 'h' for help)") oldcursor = g.getcursor() g.setcursor("Move") oldcells = [] try: aborted = True moveselection() aborted = False finally: g.setcursor(oldcursor) if aborted: g.clear(0) if len(oldcells) > 0: g.putcells(oldcells) g.putcells(firstpatt) g.select(firstrect) else: g.show(" ")