On Tue, Mar 4, 2014 at 9:17 AM, Nouvelle Collection <
[email protected]> wrote:
> Hello,
> (This is my last question for the week, sorry for all these mails).
>
> I would like to change the image of a ScaledBitmap when clicking on it :
>
> A = self.Canvas.AddScaledBitmap(img, (0,0), Height=img.GetHeight(),
> Position = 'tl')
> A.Bind(FloatCanvas.EVT_FC_LEFT_DOWN, self.OnDown)
>
> def OnDown(self, elt):
> # ...
> # Change A's image to another bitmap
>
> *The goal is to make a ToggleButton : each click on the button would
> toggle between img1 and img2.*
>
> Remark : I already implemented it by doing :
> A_enabled = self.Canvas.AddScaledBitmap(img_ena, (0,0),
> Height=img_ena.GetHeight(), Position = 'tl')
> A_disabled = self.Canvas.AddScaledBitmap(img_dis, (0,0),
> Height=img_dis.GetHeight(), Position = 'tl')
> and then each click on both of them would *hide one of them, and show the
> other*...
> But this is a kind of dirty way to do it...
>
Well, that's not so bad....
But the semi-"right" way to do it would be to change the Image in place:
def OnDown(self, elt):
# ...
# Change A's image to another bitmap
elt.Image = the_new_image
This should "just work", but only if:
the_new_image is a wx.Image object
it is the same size as the previous image.
But the "right" way to do it is to make a ScaledBitmap that stored two
images. You could subclass ScaledBitmap:
class ToggleScaledBitmap(FloatCanvas.ScaledBitmap):
def__init__(self, Bitmap1, Bitmap2, *args, **kwargs):
if type(Bitmap1) == wx._gdi.Bitmap:
self.Image1 = Bitmap1.ConvertToImage()
elif type(Bitmap) == wx._core.Image:
self.Image1 = Bitmap1
## repeated code -- should be cleaned up...
if type(Bitmap2) == wx._gdi.Bitmap:
self.Image2 = Bitmap1.ConvertToImage()
elif type(Bitmap) == wx._core.Image:
self.Image2 = Bitmap2
## some checks in here to make sure that the two bitmaps are the
same size...
FloatCanvas.ScaledBitmap.__init__(self, self.Image1, *args,
**kwargs)
def ChangeBitmap(self, bitmap_num=1):
if bitmap_num == 1:
self.Image = self.Image1
elif bitmap_num == 2:
self.Image = self.Image2
else:
raise ValueError("bitmap_num ust be either 1 or 2")
All untested....
Better yet, make it a MultiScaledBitmap, and allow the user to pass in a
list of Images of any length, and switch between them.
This would be nice to add to FloatCanvas once you get it working....
-Chris
--
Christopher Barker, Ph.D.
Oceanographer
Emergency Response Division
NOAA/NOS/OR&R (206) 526-6959 voice
7600 Sand Point Way NE (206) 526-6329 fax
Seattle, WA 98115 (206) 526-6317 main reception
[email protected]
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