var S: String; begin with Memo1 do begin S := Lines[1]; Insert('A', S, 3); Lines[1] := S; end; end;———————————————————————————————————— 宠辱不惊,看庭前花开花落,去留无意;毁誉由人,望天上云卷云舒,聚散任风。 ————————————————————————————————————
取Tmemo的当前行及跳转到指定行 向Tmemo发送WM_KEYDOWN消息可实现跳转到指定行var i,line,lineDest:integer; //line表示取出的Memo1的当前行号 //lineDest表示需要跳到的行号memo1.SetFocus; line:=1; lineDest:=2;//取当前行号line for i:=0 to length(memo1.text) do begin if memo1.Text[i]=chr(13) then line:=line+1; if memo1.SelStart<=i then break; end;//跳转到LineDest行 if lineDest>line then begin for i:=line to lineDest-1 do postmessage(memo1.handle,WM_KEYDOWN,VK_DOWN,0); end else if lineDest<line then begin for i:=lineDest to line-1 do postmessage(memo1.handle,WM_KEYDOWN,VK_UP,0); end;
procedure TSRichEdit.SetTopLine(Value: integer);
{Put selected line at top of memo}
var
tl: integer;
begin
tl := Value;
if tl < 0 then tl := 0;
if tl > Lines.Count - 1 then tl := Lines.Count - 1;
SendMessage(Handle, EM_LINESCROLL, 0, tl - SendMessage(Handle, EM_GETFIRSTVISIBLELINE, 0, 0));
end;光标定位到某一行:
procedure TSRichEdit.SetCurrentLine(Value: integer);
{Put caret on start of selected line}
var
cl: integer;
begin
cl := Value;
{Restrict range to available lines}
if cl < 0 then cl := 0;
if cl > Lines.Count - 1 then cl := Lines.Count - 1;
SelLength := 0;
SelStart := SendMessage(Handle, EM_LINEINDEX, cl, 0);
end;光标定位到某一列:
procedure TSRichEdit.SetCurrentPosition(Value: integer);
var
cl: integer;
cp: integer;
begin
cl := GetCurrentLine;
cp := Value;
if cp < 0 then cp := 0;
if (cp > Length(Lines[cl])) then cp := Length(Lines[cl]);
{Put caret in selected position}
SelLength := 0;
SelStart := SendMessage(Handle, EM_LINEINDEX, cl, 0) + cp;
end;
光标定位到指定的坐标点 richedit1.Perform(WM_LBUTTONDOWN, MK_LBUTTON, MakeLong(X, Y));
DWGZ() 你是在richedit里的啊!~ 你这两个过程是不是自定义的? 我没有看太明白 能不能解释一下 谢谢
S: String;
begin
with Memo1 do
begin
S := Lines[1];
Insert('A', S, 3);
Lines[1] := S;
end;
end;————————————————————————————————————
宠辱不惊,看庭前花开花落,去留无意;毁誉由人,望天上云卷云舒,聚散任风。
————————————————————————————————————
向Tmemo发送WM_KEYDOWN消息可实现跳转到指定行var i,line,lineDest:integer;
//line表示取出的Memo1的当前行号
//lineDest表示需要跳到的行号memo1.SetFocus;
line:=1;
lineDest:=2;//取当前行号line
for i:=0 to length(memo1.text) do
begin
if memo1.Text[i]=chr(13) then line:=line+1;
if memo1.SelStart<=i then break;
end;//跳转到LineDest行
if lineDest>line then
begin
for i:=line to lineDest-1 do
postmessage(memo1.handle,WM_KEYDOWN,VK_DOWN,0);
end
else if lineDest<line then
begin
for i:=lineDest to line-1 do
postmessage(memo1.handle,WM_KEYDOWN,VK_UP,0);
end;