//任意摆布一个控件(拖动、放大、缩小)****************************************** procedure ManipulateControl(Control: TControl; Shift: TShiftState; X, Y, Precision: Integer); var SC_MANIPULATE: Word; begin //光标在控件的最左侧********************************************************** if (X <= Precision) and (Y > Precision) and (Y < Control.Height - Precision) then begin SC_MANIPULATE := $F001; Control.Cursor := crSizeWE; end //光标在控件的最右侧********************************************************** else if (X >= Control.Width - Precision) and (Y > Precision) and (Y < Control.Height - Precision) then begin SC_MANIPULATE := $F002; Control.Cursor := crSizeWE; end //光标在控件的最上侧********************************************************** else if (X > Precision) and (X < Control.Width - Precision) and (Y <= Precision) then begin SC_MANIPULATE := $F003; Control.Cursor := crSizeNS; end //光标在控件的左上角********************************************************** else if (X <= Precision) and (Y <= Precision) then begin SC_MANIPULATE := $F004; Control.Cursor := crSizeNWSE; end //光标在控件的右上角********************************************************** else if (X >= Control.Width - Precision) and (Y <= Precision) then begin SC_MANIPULATE := $F005; Control.Cursor := crSizeNESW; end //光标在控件的最下侧********************************************************** else if (X > Precision) and (X < Control.Width - Precision) and (Y >= Control.Height - Precision) then begin SC_MANIPULATE := $F006; Control.Cursor := crSizeNS; end //光标在控件的左下角********************************************************** else if (X <= Precision) and (Y >= Control.Height - Precision) then begin SC_MANIPULATE := $F007; Control.Cursor := crSizeNESW; end //光标在控件的右下角********************************************************** else if (X >= Control.Width - Precision) and (Y >= Control.Height - Precision) then begin SC_MANIPULATE := $F008; Control.Cursor := crSizeNWSE; end //光标在控件的客户区(移动整个控件)****************************************** else if (X > 5) and (Y > 5) and (X < Control.Width - 5) and (Y < Control.Height - 5) then begin SC_MANIPULATE := $F009; Control.Cursor := crSizeAll; end else begin SC_MANIPULATE := $F000; Control.Cursor := crDefault; end; //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ if Shift = [ssLeft] then begin ReleaseCapture; Control.Perform(WM_SYSCOMMAND, SC_MANIPULATE, 0); end; end;procedure TForm1.cht1MouseMove(Sender: TObject; Shift: TShiftState; X, Y: Integer); begin ManipulateControl((Sender as TControl), Shift, X, Y, 10); end;
procedure TForm1.Chart1MouseMove(Sender: TObject; Shift: TShiftState; X, Y: Integer); begin ManipulateControl((Sender as TControl), Shift, X, Y, 10); end; 请教一下四楼,为什么放大或缩小的时候,不会显示放大缩小的图标呢? 如果换成按钮就能正常显示放大和缩小的图标?
procedure ManipulateControl(Control: TControl; Shift: TShiftState; X, Y, Precision: Integer);
var
SC_MANIPULATE: Word;
begin
//光标在控件的最左侧**********************************************************
if (X <= Precision) and (Y > Precision) and (Y < Control.Height - Precision) then
begin
SC_MANIPULATE := $F001;
Control.Cursor := crSizeWE;
end
//光标在控件的最右侧**********************************************************
else if (X >= Control.Width - Precision) and (Y > Precision) and (Y < Control.Height - Precision) then
begin
SC_MANIPULATE := $F002;
Control.Cursor := crSizeWE;
end
//光标在控件的最上侧**********************************************************
else if (X > Precision) and (X < Control.Width - Precision) and (Y <= Precision) then
begin
SC_MANIPULATE := $F003;
Control.Cursor := crSizeNS;
end
//光标在控件的左上角**********************************************************
else if (X <= Precision) and (Y <= Precision) then
begin
SC_MANIPULATE := $F004;
Control.Cursor := crSizeNWSE;
end
//光标在控件的右上角**********************************************************
else if (X >= Control.Width - Precision) and (Y <= Precision) then
begin
SC_MANIPULATE := $F005;
Control.Cursor := crSizeNESW;
end
//光标在控件的最下侧**********************************************************
else if (X > Precision) and (X < Control.Width - Precision) and (Y >= Control.Height - Precision) then
begin
SC_MANIPULATE := $F006;
Control.Cursor := crSizeNS;
end
//光标在控件的左下角**********************************************************
else if (X <= Precision) and (Y >= Control.Height - Precision) then
begin
SC_MANIPULATE := $F007;
Control.Cursor := crSizeNESW;
end
//光标在控件的右下角**********************************************************
else if (X >= Control.Width - Precision) and (Y >= Control.Height - Precision) then
begin
SC_MANIPULATE := $F008;
Control.Cursor := crSizeNWSE;
end
//光标在控件的客户区(移动整个控件)******************************************
else if (X > 5) and (Y > 5) and (X < Control.Width - 5) and (Y < Control.Height - 5) then
begin
SC_MANIPULATE := $F009;
Control.Cursor := crSizeAll;
end else
begin
SC_MANIPULATE := $F000;
Control.Cursor := crDefault;
end;
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
if Shift = [ssLeft] then
begin
ReleaseCapture;
Control.Perform(WM_SYSCOMMAND, SC_MANIPULATE, 0);
end;
end;procedure TForm1.cht1MouseMove(Sender: TObject; Shift: TShiftState; X,
Y: Integer);
begin
ManipulateControl((Sender as TControl), Shift, X, Y, 10);
end;
Y: Integer);
begin
ManipulateControl((Sender as TControl), Shift, X, Y, 10);
end;
请教一下四楼,为什么放大或缩小的时候,不会显示放大缩小的图标呢?
如果换成按钮就能正常显示放大和缩小的图标?