Как изменить цвет всех компонентов на форме в Run-time?
Falk0ner, вс, 06/07/2008 - 15:34.
With D4:
Tip by Charles McNicoll
Взято из http://www.lmc-mediaagentur.de/dpool
I would like to change the font color on all components on a form at runtime (and the components owned by the components etc). I devised a recursive algorithm using RTTI that accepts a TComponent as a parameter. It works to some extent, but I still have to use 'if' statements to cast the object to a particular descendant, resulting in about 30 lines of code to test for all of the components I use. Also, some objects (TColumnTitle), are not descended from TComponent, even though they have a font property.
This may do the trick (with D6 and maybe D5):
uses
TypInfo;
{ ... }
var
i: integer;
aFont: TFont;
begin
for i := 0 to aComponent.ComponentCount - 1 do
begin
aFont := TFont(GetOrdProp(aComponent.Components[i], 'Font'));
if assigned(aFont) then
aFont.Color := clWhite;
end;
end;
TypInfo;
{ ... }
var
i: integer;
aFont: TFont;
begin
for i := 0 to aComponent.ComponentCount - 1 do
begin
aFont := TFont(GetOrdProp(aComponent.Components[i], 'Font'));
if assigned(aFont) then
aFont.Color := clWhite;
end;
end;
With D4:
{ ... }
var
i: integer;
aFont: TFont;
pi: PPropInfo;
begin
for i := 0 to aComponent.ComponentCount - 1 do
begin
pi := GetPropInfo(aComponent.Components[i].ClassInfo, 'Font');
if assigned(pi) then
TFont(GetOrdProp(aComponent.Components[i],pi)).Color := clWhite;
end;
end;
var
i: integer;
aFont: TFont;
pi: PPropInfo;
begin
for i := 0 to aComponent.ComponentCount - 1 do
begin
pi := GetPropInfo(aComponent.Components[i].ClassInfo, 'Font');
if assigned(pi) then
TFont(GetOrdProp(aComponent.Components[i],pi)).Color := clWhite;
end;
end;
Tip by Charles McNicoll
Взято из http://www.lmc-mediaagentur.de/dpool
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