我希望在我的 tcltk 窗口中插入一个“正在加载”的 GIF 图像,但我无法理解它。以下是一个可重现的示例:-
backg <- 'white'
pdlg <- tktoplevel(background=backg)
tcl('wm', 'geometry', pdlg, '500x100+450+350')
tilg <- 'Package installation in progress'
tkwm.title(pdlg, tilg)
fn <- tkfont.create(family = 'helvetica', size = 12)
nwlabel <- " The requisite packages are being installed. This may take several \nminutes... \n"
tllab <- tklabel(pdlg, text = nwlabel, font = fn, pady = 0, background=backg)
clickEv <- tclVar(0)
OK.but <- tkbutton(pdlg, text=' Stop ', command=function() tclvalue(clickEv) <- 1, font=fn, background='grey', pady=0)
tkgrid(tllab, columnspan=1)
tkgrid(OK.but, row=3)
tkbind(pdlg, "<Destroy>", function() tclvalue(done) <- 2)
tkfocus(pdlg)
#This allows me to insert a GIF image but the animation is lost. Also it would be convenient if the output can be obtained using 'tkgrid' instead of 'tkpack'
pdlg2 <- tktoplevel(background='white')
loading <- tclVar()
tcl('image', 'create', 'photo', loading,
file='file path to GIF file')
trial <- tklabel(pdlg2, image=loading)
tkpack(trial)
可以从这里下载一个示例 GIF 文件 -http://www.dlfpramericalife.com/library/images/final_loading_big.gif
理想情况下,GIF 图像应放置在“停止”按钮上方但文本下方。非常感谢您的帮助!