[lazarus] TCanvas handle

[Shane Miller]

Here is the list we started with.  Number 6 is done.  Any changes on any of
the others?

1) Fix the following which does not work for some reason:
       Font.OnChange := @FontChanged

2) Write the implementation for LoadFromResourceName to load the Mark
bitmaps.

3) Write a replacement function for the following Windows functions:
     GetObject
     CreateFontIndirect
     GetDC
     SelectObject
     GetTextMetrics
     ReleaseDC
     DeleteObject
     HideCaret
     GetSystemMetrics
     ExtTextOut
     ShowCaret
     SetCaretPos
     SetScrollInfo
     ShowScrollBar

4) Fix Draw method parameter list of TImageList to match Delphi parameter
list.

5) Create a way to perform the following action:
       inherited Font := Value
    where Value is a TFont.

DONE temporarily---6) Add Pitch to the TFont object.

7) Write a RecreateWnd method.

8) Create the following methods in the parent object (TCustomControl):
     WMKillFocus
     WMNCHitTest
     WMSetFocus
     WMSize


mwhighlighter.pas

1) Write Registry or Ini file code to replace RegOpenKeyEx.


mwpassyn.pas

1) Fix compiler bug so it will call a function that is being pointed to by
an
array variable.



------------------------------------------------------------
Shane Miller

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----------------------------------------------------------
-----Original Message-----
From: Marc Weustink <weus at quicknet.nl>
To: lazarus at miraclec.com <lazarus at miraclec.com>
Date: Tuesday, November 16, 1999 2:19 PM
Subject: Re: [lazarus] TCanvas handle


>At 15:24 16-11-99 -0600, shane wrote:
>>I believe someone mentioned that they felt that the canvas' handle should
>point to a GC instead of the widget it points to now.  I tend to agree with
>the small amount of investigation I spent on the subject.
>
>That was me.
>
>>
>>I assume the GC will be gooten from the function call GETDC (which will
>call getgc for gtk).
>>FHandle in TCanvas points to a HFont which is a longword (or something
>like that).  I assume we'll simply type-cast it as a GC and it'll work in
>gtkinterface.
>
>I already started some experiments/implements on that. Just a GC isn't
>enough. You also need a window. Just look at the code I've committed for
>GetDC in gtkwinapi.inc
>
>>Is anyone planning on working on this?
>
>Yes, From the results I've now it looks promising.
>
>>I see someone posted the bitmap code but there are a ton of errors because
>a new VCLGLOBALS wasn't posted that included such things as CSBITMAP and
>the like.  Whomever did this, please fix it so it compiles again.  If you
>need help, let us know.
>
>EEhhh... I guess I committed some changes to much. As soon as I've cleaned
>up the mess I'll commit the rest. I think this part of bitmap code (just
>the canvas) was also from me.
>This all was an attempt to get mwEdit to accept text and draw lines and
>stuff, and add some mere WINAPI stuff. The raw ideas for the bitmap canvas
>where accidently commited as well.
>To fix this (I guess by head), simply comment out all csBitmap code in
>CreateComponent (gtkobject.inc)
>
>
>>I would like to get a snapshot of what is being worked on so we can move
>forward with getting this editor working.   We have a lot of functions we
>need to add.
>
>>Please let me know if the getdc functions are being written and if the
>canvas stuff is being re-written to support fhandle.
>
>This moment I'm working on the DC/Canvas/winapi stuff.
>
>>I have to look over the new setup we have with the new include files.  I
>haven't had time to investigate them yet to see if this is a better way.
>
>
>>
>>Before making a drastic change like this, I think we should disuss it a
>bit more........  :-)
>
>Ok, OK it got a bit out of hand. It were all little changes, but in the end
>its huge.
>
>It started with mwEdit problems, then fonts came, then DC then Canvas.
>Everything just comes together. Maybe I did some things to fast.
>
>Marc
>
>
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