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Chip 2000 February
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701.txt
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1999-11-15
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2KB
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48 lines
{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{ Downloaded from The Coder's Knowledge Base }
{ http://www.netalive.org/ckb/ }
{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{ @ CKB Header Version.: 1.01 }
{ @ Category ID........: delphi_misc }
{ @ Added to database..: 10.11.98 }
{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{ @ Title..............: Mouse move }
{ @ Original Filename..: mousemove.txt }
{ @ Author.............: Bent Normann Olsen (normann@greennet.gl) }
{ @ Description........: Highlight a comp by mouse move }
{ @ Tested w. Compiler.: not tested yet }
{ @ Submitted by.......: Unofficial Delphi Developers FAQ (uddf@gnomehome.demon.nl) }
{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
I want to write a component which highlights when the user moves the
mouse over the comp.
Use CM_MOUSEENTER and CM_MOUSELEAVE messages like:
TYourObject = class(TAnyControl)
private
FMouseInPos : Boolean;
procedure CMMouseEnter(var AMsg: TMessage); message CM_MOUSEENTER;
procedure CMMouseLeave(var AMsg: TMessage); message CM_MOUSELEAVE;
end;
implementation
procedure TYourObject.CMMouseEnter(var AMsg: TMessage);
begin
FMouseInPos := True;
Refresh;
end;
procedure TYourObject.CMMouseLeave(var AMsg: TMessage);
begin
FMouseInPos := False;
Refresh;
end;
...and then read FMouseInPos when painting the control, or in any way you like to change the highlightning.