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zoom out added

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This commit is contained in:
ronaldhordijk 2005-06-05 07:22:41 +00:00
parent dec7ba3333
commit f73c95edec
1 changed files with 23 additions and 1 deletions
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24
2.10/Source/ControlPoint.pas
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@ -121,6 +121,7 @@ type
destructor Destroy; override;
procedure ZoomtoRect(R: TRect);
procedure ZoomOuttoRect(R: TRect);
procedure ZoomIn(Factor: double);
procedure MoveRect(R: TRect);
procedure Rotate(Angle: double);
@ -1136,7 +1137,7 @@ begin
if ((maxx - minx) > 1000) or
((maxy - miny) > 1000) then
raise EMathError.Create('Flame area to large');
raise EMathError.Create('Flame area too large');
cp.center[0] := (minx + maxx) / 2;
cp.center[1] := (miny + maxy) / 2;
@ -1627,6 +1628,27 @@ begin
Zoom := Log2(Scale);
end;
///////////////////////////////////////////////////////////////////////////////
procedure TControlPoint.ZoomOuttoRect(R: TRect);
var
scale: double;
ppux, ppuy: double;
dx,dy: double;
begin
scale := power(2, zoom);
ppux := pixels_per_unit * scale;
ppuy := pixels_per_unit * scale;
dx := ((r.Left + r.Right)/2 - Width/2)/ppux ;
dy := ((r.Top + r.Bottom)/2 - Height/2)/ppuy;
center[0] := center[0] + cos(FAngle) * dx - sin(FAngle) * dy;
center[1] := center[1] + sin(FAngle) * dx + cos(FAngle) * dy ;
Scale := Scale * Min( Width/(abs(r.Right - r.Left) + 1), Height/(abs(r.Bottom - r.Top) + 1)) ;
Zoom := Log2(1/Scale);
end;
///////////////////////////////////////////////////////////////////////////////
procedure TControlPoint.ZoomIn(Factor: double);
var