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//光标在控件不同位置时的样式
// 由于拐角这点手动精确实在困难 所以用范围 范围+3 这样很容易就找到这一点了
procedure CtrlMouseMove(Ctrl: TWinControl; Shift: TShiftState;X, Y: Integer);
begin
with Ctrl do
begin
if (X >= 0) and (X <= 3) then
begin
if (Y >= 0) and (Y <= 3) then Cursor := crSizeNWSE;
if (Y > 3) and (Y < Height - 3) then Cursor := cRsizewe;
if (Y >= Height - 3) and (Y <= Height) then Cursor := crSizeNESW;
end
else if (X > 3) and (X < Width - 3) then
begin
if (Y >= 0) and (Y <= 3) then Cursor := crSizeNS;
if (Y > 3) and (Y < Height - 3) then Cursor := cRarrow;
if (Y >= Height - 3) and (Y <= Width) then Cursor := crSizeNS;
end
else if (X >= Width - 3) and (X <= Width) then
begin
if (Y >= 0) and (Y <= 3) then Cursor := crSizeNESW;
if (Y > 3) and (Y < Height - 3) then Cursor := cRsizewe;
if (Y >= Height - 3) and (Y <= Width) then Cursor := crSizeNWSE;
end;
end;
end;
//改变控件的大小
procedure CtrlMouseDown(Ctrl: TWinControl; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
var
WParam: Integer;
begin
with Ctrl do
begin
if (X >= 0) and (X <= 3) then
begin
if (Y >= 0) and (Y <= 3) then WParam:=$F004;
if (Y > 3) and (Y < Height - 3) then WParam:=$F001;
if (Y >= Height - 3) and (Y <= Height) then WParam:=$F007;
end
else if (X > 3) and (X < Width - 3) then
begin
if (Y >= 0) and (Y <= 3) then WParam:=$F003;
if (Y > 3) and (Y < Height - 3) then WParam:=$F012;
if (Y >= Height - 3) and (Y <= Width) then WParam:=$F006;
end
else if (X >= Width - 3) and (X <= Width) then
begin
if (Y >= 0) and (Y <= 3) then WParam:=$F005;
if (Y > 3) and (Y < Height - 3) then WParam:=$F002;
if (Y >= Height - 3) and (Y <= Width) then WParam:=$F008;
end;
ReleaseCapture;
SendMessage(Handle,WM_SYSCOMMAND,WParam,0);
end;
end;
使用
procedure TForm1.Panel1MouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
begin
CtrlMouseDown(Panel1, Button, Shift, X, Y);
end;
procedure TForm1.Panel1MouseMove(Sender: TObject; Shift: TShiftState;
X, Y: Integer);
begin
CtrlMouseMove(Panel1, Shift, X, Y);
end;
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