Backround image supports only bitmaps

[vincentparrett]

From an...@rambler.ru on May 25, 2010 22:33:09

Background property somewhy supports only BMP images, though it is
declared as TPicture which supports JPG, GIF, PNG and many other formats.
Having taken a look into the code I found massive usage of
FBackground.Bitmap so it will be not so easy to fix. So, there are 3 ways:

1. the best but probably the hardest Get rid of Bitmap, use only Canvas
2. Convert any image loaded to TBitmap internally
3. the worst but the easiest Change FBackground type to TBitmap to avoid
   further confusions

Original issue: http://code.google.com/p/virtual-treeview/issues/detail?id=148

[vincentparrett]

From joachim....@gmail.com on September 23, 2014 12:32:04

I guess we need to choose way 3 due to a lack of time and developers. We could use code like this in TBaseVirtualTree.SetBackground() (suggested by another user)

var
B: TBitmap;
begin
if Value.Graphic is TBitmap then
FBackground.Assign(Value)
else
begin
B:= TBitmap.Create;
try
//SZ 2014-09-23 Avoid using B.SetSize in order to keep D7 compatibility!
B.Width := Value.Width;
B.Height := Value.Height;
B.Canvas.Draw(0,0, Value.Graphic);
FBackground.Assign(B)
finally
B.Free
end;
end;

Owner: joachim....@gmail.com

[vincentparrett]

From fr0st.br...@gmail.com on November 18, 2014 03:17:58

Yep, it's the 2nd way. Quite fine decision.

[sanjayssk]

Short issue description for changes.txt:
Backround image property can now load files other than bmp. Tested png, gif and jpg.