window.width and window.height

wipmat007

i put win.width and win.height under the resize function and it crashes the IDE this might be user error on my part but i just wanna make sure it isnt a bug, if it is user error would you mind explaining why so i can avoid doing it.

wipmat007

local ui = require"ui" local win = ui.Window("Label.constructor() sample", 500, 500) function win:onResize() print("resizing") self:status("Window.width = "..self.width, "Window.height = "..self.height) win.width = 500 win.height = 500 end win:show() repeat ui.update() until not win.visible

Samir

Thank you wipmat, I will check that

cos00kun

I think the problem is these lines:

win.width = 500
win.height = 500

The onResize() event will run as soon as the size of the window changes and you type win.width = 500 and win.height = 500 it acts as if the size of the window has changed every second even if it doesn't actually change.

Samir

cos00kun I think the problem is these lines:

Yes I think it too. Changing window size inside an Window:onResize() event throws a new onResize event which might cause the crash.

If you want to prevent any Window resizing it's better to use the "fixed" Window style

cos00kun

local ui = require"ui"
local win = ui.Window("Label.constructor() sample", 500, 500)

function win:onResize()
	print("resizing")
	self:status("Window.width = "..self.width, "Window.height = "..self.height)
end
	win.width = 500
	win.height = 500

win:show()
repeat
ui.update()
until not win.visible

steve64

Any way to get a resizable main window with maximum width and height?

Samir

Hi Steve,

I will see what can be done. Have you tried to do it in Lua using the Window.onResize() event ?

steve64

I suppose, as you said above, that if I change width and height inside the onResize() event hander I will trigger an event again causing a loop...

Samir

Yes sorry you are right I thought I have fixed this

esferatec

In the onRize() event, all you need to do is check if the width or height of the window is greater than your maximum width or height. Only in this case yout can set the maximum width or height.

if win.width > 500 then
  win.width = 500
end

if win.height > 500 then
  win.height = 500
end

In this case the user can change the window width and height. If it is higher then 500 the window width and height will be changed to 500. If it is under 500 the window width and heigth will stay where the user changed the border.

steve64

That's clear but the problem is that changing the properties inside the handler would trigger a new onRezize event, anyway I will try that again

esferatec

Maybe I don't understand what you want to accomplish.

When you resize the window, the onResize event is fired. If the width is greater than 500, win.width is set to 500. This would fire the onResize event again. Because of the if statement, the event ends with nothing being done. If the width is smaller then 500 the onRisze event ends also with doing nothing. This prevents the event from being triggered again and again.

steve64

Thanks esferatec and Samir, I tried with latest Lua 1.8.0 and now it works fine,
Below my test code:

local ui = require 'ui'

local win = ui.Window('RESIZE DEMO', 300, 200)

function win:onResize()
  if self.width < 100 then self.width = 100 end
  if self.width > 500 then self.width = 500 end
  if self.height < 200 then self.height = 200 end  
  if self.height > 500 then self.height = 500 end  
end

win:show()

repeat
  win:status('Size: '..win.width ..' X '..win.height)
  ui.update()  
until not win.visible