Как прочитать свойство напрямую из его ресурса?
01.01.2007
if ReadPropertyValue('Form1.Button1', 'width') > 1000 then
ShowMessage('You are about to create a big button!');
function TForm1.ReadProp(r: TReader): string;
begin
result := '';
{Determine the value type of the property, read it with the appropriate method of TReader
and convert it to string. Not all value types are implemented here but you get the idea.}
case r.NextValue of
vaInt8, vaInt16, vaInt32:
result := IntToStr(r.ReadInteger);
vaExtended:
result := FloatToStr(r.ReadFloat);
vaString:
result := r.ReadString;
else
r.SkipValue; {Not implemented}
end;
end;
procedure TForm1.ReadRes(PropPath: string; r: TReader);
var
p: string;
begin
{Skip the class name}
r.ReadStr;
{Construct the property path}
if PropPath = '' then
p := r.ReadStr
else
p := PropPath + '.' + r.ReadStr;
{Read all properties and its values and fill them into the memo}
while not r.EndOfList do
Memo1.Lines.Add(p + '.' + r.ReadStr + ' = ' + ReadProp(r));
{Skip over the end of the list of the properties of this component}
r.CheckValue(vaNull);
{Recursively read the properties of all sub-components}
while not r.EndOfList do
begin
ReadRes(p, r);
r.CheckValue(vaNull);
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
var
strm: TResourceStream;
Reader: TReader;
begin
strm := TResourceStream.Create(HInstance, 'TForm1', RT_RCDATA);
Reader := TReader.Create(strm, 1024);
try
Memo1.Clear;
Reader.ReadSignature;
ReadRes('', Reader);
finally
Reader.Free;
strm.Free;
end;
end;
Only one small problem.
r.SkipValue was protected (in D5) but I hacked that out with the following code:
type THackReader = class(TReader);
{ ... }
THackReader(r).SkipValue;
Tip by Michael Duerig and Tjipke A. van der Plaats