[英]How to loop through each visible char of a TRichEdit text?
在 Delphi 10.3.3 中,循環遍歷(多行) TRichEdit
文本的每個可見Char
(即排除不可打印字符,例如#13
)的最簡單、最快和最有效的方法是什么? 然后我需要根據我的計算獲取並設置每個字符的顏色。
我試過這個:
function GetCharByIndex(Index: Integer): Char;
begin
RichEdit1.SelStart := Index;
RichEdit1.SelLength := 1;
Result := RichEdit1.SelText[1];
end;
RichLen := RichEdit1.GetTextLen - RichEdit1.Lines.Count;
for i := 0 to RichLen - 1 do
begin
c := GetCharByIndex(i);
if c = #13 then CONTINUE;
// ... do my stuff here
end;
但我相信一定有更好的方法。
var
i: Integer;
c: Char;
cord: Integer;
...
i := -1;
for c in RichEdit1.Text do
begin
Inc(i);
cord := ord(c);
if (cord = 13) then
Dec(i);
if (cord >= 32) and (not ((cord > 126) and (cord < 161))) then
begin
// do your stuff here, for example exchanging red and green colors:
RichEdit1.SelStart := i;
RichEdit1.SelLength := 1;
if RichEdit1.SelAttributes.Color = clGreen then
RichEdit1.SelAttributes.Color := clRed
else if RichEdit1.SelAttributes.Color = clRed then
RichEdit1.SelAttributes.Color := clGreen;
end;
end;
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