On Mon, 21 Mar 2011, Alexander Klenin wrote:
2011/3/21 <[email protected]>:
Using widgetset is perhaps not the ideal solution, but the practical one,
given the contraints of existing tools.
Surely they may be improved, but that is not fast not easy to do.
Correct. Unfortunately, no-one seems to be willing to take on the task :(
But I am willing, and doing it right now ;)
Glad to hear it :)
And while other paremeters (especially fonts) are not
required for bitmap, they are definitely required to draw a chart on it.
There are many ways to specify drawing parameters and primitives,
and using widgetset is quite valid way.
Here I differ in opinion. If what you are saying is true, things like
PostScript could never exist.
And PHP makes very nice charts without screen.
Please do not conflate "screen" with "widgetset".
In my opinion "No screen => no widgetset." ?
Now, the fact that a widgetset tries to access *screen* to create a bitmap
is a problem, I would even call it a bug, although I do not know if it is in
GTK or LCL.
I suppose the LCL, because most likely it asks some system metrics (DPI
etc). The widgetset can only get them from the display...
That is a deficiency that could be fixed.
Why ? As far as I know, all operations in LCL are present in fpImage.
If some are missing, we can implement them.
For starters, the absence of following is most problematic:
Canvas.FillRect
Canvas.RadialPie
Font.Orientation
FillRect and RadialPie can be solved easily. The Font.Orientation can be
added as a property, I would have to look at FreeType to see how it can be
implemented. Consider it on the todo list. I can add the missing
properties/methods quickly, their implementations may take slightly longer
:-)
Again, I don't claim it is easy, but I regret that everyone starting a set
of components time and again takes the same road...
I did not start TAChart, but I do try to improve it's design.
Great =-)
Well. Very likely I'll need charting in a web project of mine. At that time,
I'll probably have to re-implement TAchart on top of TFPImage :(
If you implement the missing parts of FPCanvas,
there is a good chance you will not have to re-implement TAChart ;)
I will try to do so ASAP.
Michael.
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