drwobj.pas

delphi语言开发的矢量图形处理对象

  else
     result.X :=m_x2;
  if m_y1>m_y2 then
     result.Y :=m_y1
  else
     result.Y :=m_y2;
end;

function TDrawLine.getMinPoint: TPoint;
begin
  if m_x1<m_x2 then
     result.X :=m_x1
  else
     result.X :=m_x2;
  if m_y1<m_y2 then
     result.Y :=m_y1
  else
     result.Y :=m_y2;
end;

procedure TDrawLine.HotPoints(drwCanvas: TCanvas);
begin
  HotPoint(drwCanvas,round(m_x1*fZoomScale),round(m_y1*fZoomScale));
  HotPoint(drwCanvas,round(m_x2*fZoomScale),round(m_y2*fZoomScale));
end;

function TDrawLine.IsValid: boolean;
var
  t1,t2:TPoint;
begin
  t1:=Point(m_x1,m_y1);
  t2:=Point(m_x2,m_y2);
  result:=not IsEqual(t1,t2);
end;

procedure TDrawLine.Load(stream: TStream);
begin
  inherited;
  stream.Read(m_x1,sizeOf(longint));
  stream.Read(m_y1,sizeOf(longint));
  stream.Read(m_x2,sizeOf(longint));
  stream.Read(m_y2,sizeOf(longint));
  stream.Read(fArrowStyle,sizeOf(TArrowStyle));
end;

procedure TDrawLine.MoveAt(drwCanvas: TCanvas; flags, x, y: Integer);
var
  oldPenMode:TPenMode;
  oldpenWidth:integer;
  oldpenStyle:TPenStyle;
  oldPenColor:TColor;
begin
  oldPenMode:=drwCanvas.Pen.Mode;
  oldpenWidth:=drwCanvas.Pen.Width ;
  oldpenStyle:=drwCanvas.Pen.Style;
  oldPenColor:=drwCanvas.Pen.Color;
  drwCanvas.Pen.Style:=getPenStyle;
  drwCanvas.Pen.width:=1;
  drwCanvas.Pen.Color :=clBlack;
  drwCanvas.Pen.Mode:=pmNotXor;
   if mSelected then
  HotPoints(drwCanvas);
  {删除原图形线}
{  if fArrowStyle<>arNone then
  drawArrow(drwCanvas,Point(round(m_x1*fZoomScale),round(m_y1*fZoomScale)),Point(round(m_x2*fZoomScale),round(m_y2*fZoomScale)),fArrowStyle);}
  drwCanvas.MoveTo(round(m_x1*fZoomScale),round(m_y1*fZoomScale));
  drwCanvas.LineTo(round(m_x2*fZoomScale),round(m_y2*fZoomScale));

  {修改新图形坐标}
  if flags=1 then
  begin
    m_x1:=x;
    m_y1:=y;
  end
  else if flags=2 then
  begin
    m_x2:=x;
    m_y2:=y;
  end
  else if flags=-1 then
  begin
    m_x1:=m_x1+x-m_oldx;
    m_y1:=m_y1+y-m_oldy;
    m_x2:=m_x2+x-m_oldx;
    m_y2:=m_y2+y-m_oldy;
    m_oldx:=x;
    m_oldy:=y;
  end;
  {绘制新图形}
  drwCanvas.MoveTo(round(m_x1*fZoomScale),round(m_y1*fZoomScale));
  drwCanvas.LineTo(round(m_x2*fZoomScale),round(m_y2*fZoomscale));
{  if fArrowStyle<>arNone then
  drawArrow(drwCanvas,Point(round(m_x1*fZoomScale),round(m_y1*fZoomScale)),Point(round(m_x2*fZoomScale),round(m_y2*fZoomscale)),fArrowStyle);}

  {如果以前选择了，设置热点}
  if mSelected then
  HotPoints(drwCanvas);
  {恢复画笔的默认模式}
  drwCanvas.Pen.Mode :=oldPenMode;
  drwCanvas.Pen.Width :=oldpenWidth;
  drwCanvas.Pen.Style :=oldpenStyle;
  drwCanvas.Pen.Color :=oldPenColor;
end;

function TDrawLine.NewPoint(x, y: Integer):integer;
begin
  m_x1:=x;m_x2:=x;
  m_y1:=y;m_y2:=y;
  result:=2;
end;

procedure TDrawLine.Save(stream: TStream);
begin
  inherited save(stream);
  stream.Write(m_x1,sizeOf(longint));
  stream.Write(m_y1,sizeOf(longint));
  stream.Write(m_x2,sizeOf(longint));
  stream.Write(m_y2,sizeOf(longint));
  stream.Write(fArrowStyle,sizeOf(TArrowStyle));
end;

function TDrawLine.SelectAt(x, y: Integer): integer;
begin
  if AtPoint(x,y,m_x1,m_y1) then
     result:=1
  else if AtPoint(x,y,m_x2,m_y2) then
     result:=2
  else if AtLine(x,y,m_x1,m_y1,m_x2,m_y2) then
  begin
     m_oldx:=x;
     m_oldy:=y;
     result:=-1;
  end
  else
     result:=0;
end;

procedure TDrawLine.Selected(drwCanvas: TCanvas; select: boolean);
begin
  if not Assigned(self) then
  exit;
  if select then
  begin
    if not mSelected then
    begin
      HotPoints(drwCanvas);
      mSelected:=true;
    end;
  end
  else
  begin
    if mSelected then
    begin
      HotPoints(drwCanvas);
      mSelected:=false;
    end;
  end;
end;

procedure TDrawLine.setOrg;
begin
  inherited;
  fRect:=Rect(m_x1,m_y1,m_x2,m_y2);
end;

{ TDrawRect }

procedure TDrawRect.Action_X;
var
  midY:longint;
begin
  midy:=m_y1;
  m_y1:=m_y2-2*(m_y2-m_y1);m_y2:=midY;
end;

procedure TDrawRect.Action_Y;
begin
  taisho_y;
  m_x1:=affinex(m_x1,m_y1,1);m_x2:=affinex(m_x2,m_y2,1);
  m_y1:=affiney(m_x1,m_y1,1);m_y2:=affinex(m_x2,m_y2,1);
end;

procedure TDrawRect.addXY(x, y, flags: integer;zoomScaleX:real=1.0;zoomScaleY:real=1.0);
begin
  if flags=-1 then
  begin
    m_x1:=round(m_x1*zoomScaleX+x);
    m_y1:=round(m_y1*zoomScaleY+y);
    m_x2:=round(m_x2*zoomScaleX+x);
    m_y2:=round(m_y2*zoomScaleY+y);
  end;
  if flags<>-1 then
  begin
    m_x1:=round(fRect.Left*zoomScaleX);
    m_y1:=round(fRect.Top*zoomScaleY);
    m_x2:=round(fRect.Right*zoomScaleX);
    m_y2:=round(fRect.Bottom*zoomScaleY);
  end;
end;

constructor TDrawRect.create;
begin
  inherited;
  FIsRoundRect:=false;
  FBrushColor:=clSilver;
  FBrushStyle:=bsClear;
  m_x1:=0;m_x2:=0;
  m_y1:=0;m_y2:=0;
  m_oldx:=0;m_oldy:=0;
end;

procedure TDrawRect.Draw(drwCanvas: TCanvas);
var
  oldPenColor,oldBrushColor:TColor;
  oldPenWidth:integer;
  oldBrushStyle:TBrushStyle;
  oldPenStyle:TPenStyle;
  oldPenMode:TPenMode;
  t:TRect;
  rgn:HRgn;
begin
  if Not Visible then
  exit;
  oldPenColor:=drwCanvas.Pen.Color;
  oldBrushColor:=drwCanvas.Brush.Color;
  oldBrushStyle:=drwCanvas.Brush.Style;
  oldPenStyle:=drwCanvas.Pen.Style;
  oldPenWidth:=drwCanvas.Pen.Width;
  oldPenMode:=drwCanvas.Pen.Mode;
  {设置新的画笔和画刷的属性}
  drwCanvas.Pen.Mode :=pmCopy;
  drwCanvas.Pen.Color :=GetPenColor;
  drwCanvas.Pen.Width :=getPenWidth;
  drwCanvas.Pen.Style :=getPenStyle;
  drwCanvas.Brush.Color :=FBrushColor;
  drwCanvas.Brush.Style :=FBrushStyle;
  {画矩形}
  t.Left :=m_x1;t.Top :=m_y1;
  t.Right :=m_x2;t.Bottom :=m_y2;

  {进行方向正常化}
  NormalRect(t);
  m_x1:=t.Left;m_y1:=t.Top;
  m_x2:=t.Right;m_y2:=t.Bottom;
  {进行图形坐标的缩放}
  t.TopLeft :=Point(round(m_x1*fZoomScale),round(m_y1*fZoomScale));
  t.BottomRight :=Point(round(m_x2*fZoomScale),round(m_y2*fZoomScale));

  //判断是否是渐变填充
  if Gradient then
  begin
    drwCanvas.Brush.Style :=bsSolid;
    if FIsRoundRect then
       rgn:=CreateRoundRectRgn(t.Left,t.Top,t.Right,t.Bottom,
            round(10*fZoomScale),round(10*fZoomScale))
    else
       rgn:=CreateRectRgn(t.Left,t.Top,t.Right,t.Bottom);
    SelectClipRgn(drwCanvas.Handle,rgn);
    FillWithGradient(drwCanvas,beginColor,endColor,GradientStyle,t);
    SelectClipRgn(drwCanvas.Handle,0);
    DeleteObject(rgn);
    drwCanvas.Brush.Style :=bsClear;
    if FIsRoundRect then
       drwCanvas.RoundRect(t.Left,t.Top,t.Right,t.Bottom,round(10*fZoomScale),round(10*fzoomScale))
    else
       drwCanvas.Rectangle(t);
  end
  else begin
    if FIsRoundRect then
       drwCanvas.RoundRect(t.Left,t.Top,t.Right,t.Bottom,round(10*fZoomScale),round(10*fzoomScale))
    else
       drwCanvas.Rectangle(t);
  end;

  {恢复画笔和画刷的原先设置}
  drwCanvas.Pen.Color :=oldPenColor;
  drwCanvas.Pen.Width :=oldPenWidth;
  drwCanvas.Pen.Mode :=oldPenMode;
  drwCanvas.Brush.Color :=oldBrushColor;
  drwCanvas.Brush.Style :=oldBrushStyle;
  drwCanvas.Pen.Style :=oldPenStyle;
  if FSelected then
  HotPoints(drwCanvas);
end;

function TDrawRect.getMaxPoint: TPoint;
begin
  result:=Point(m_x2,m_y2);
end;

function TDrawRect.getMinPoint: TPoint;
begin
  result:=Point(m_x1,m_y1);
end;

procedure TDrawRect.HotPoints(drwCanvas: TCanvas);
begin
  HotPoint(drwCanvas,round(m_x1*fZoomScale),round(m_y1*fZoomScale));
  HotPoint(drwCanvas,round(m_x2*fZoomScale),round(m_y1*fZoomScale));
  HotPoint(drwCanvas,round(m_x1*fZoomScale),round(m_y2*fZoomScale));
  HotPoint(drwCanvas,round(m_x2*fZoomScale),round(m_y2*fZoomScale));
end;

function TDrawRect.IsValid: boolean;
var
  t1,t2:TPoint;
begin
  t1:=Point(m_x1,m_y1);
  t2:=Point(m_x2,m_y2);
  result:=not PointsEqual(t1,t2);
end;

procedure TDrawRect.Load(stream: TStream);
begin
  inherited Load(stream);
  stream.Read(FIsRoundRect,sizeOf(Boolean));
  stream.Read(FBrushColor,sizeOf(TColor));
  stream.Read(FBrushStyle,sizeOf(TBrushStyle));
  stream.Read(m_x1,sizeOf(longint));
  stream.Read(m_y1,sizeOf(longint));
  stream.Read(m_x2,sizeOf(longint));
  stream.Read(m_y2,sizeOf(longint));
end;

procedure TDrawRect.MoveAt(drwCanvas: TCanvas; flags, x, y: Integer);
var
  oldPenColor:TColor;
  oldPenWidth:integer;
  oldBrushStyle:TBrushStyle;
  oldPenStyle:TPenStyle;
  oldPenMode:TPenMode;
  t:TRect;
begin
  oldPenColor:=drwCanvas.Pen.Color;
  oldBrushStyle:=drwCanvas.Brush.Style;
  oldPenWidth:=drwCanvas.Pen.Width;
  oldPenMode:=drwCanvas.Pen.Mode;
  oldPenStyle:=drwCanvas.Pen.Style;
  {设置新的画笔和画刷的属性}
  drwCanvas.Pen.Mode :=pmNotXor;
  drwCanvas.Pen.Width :=1;
  drwCanvas.Brush.Style :=bsClear;
  drwCanvas.Pen.Color :=clBlack;
  drwCanvas.Pen.Style :=getPenStyle;
  {如果存在热点，则取消热点}
  if mSelected then
  HotPoints(drwCanvas);
  {画矩形}
  t.Left :=m_x1;t.Top :=m_y1;
  t.Right :=m_x2;t.Bottom :=m_y2;
  {进行图形坐标的缩放}
  t.TopLeft :=Point(round(m_x1*fZoomScale),round(m_y1*fZoomScale));
  t.BottomRight :=Point(round(m_x2*fZoomScale),round(m_y2*fZoomScale));

  {删除原图形}
  if FIsRoundRect then
     drwCanvas.RoundRect(round(m_x1*fZoomScale),round(m_y1*fZoomScale),round(m_x2*fZoomScale),round(m_y2*fZoomScale),10,10)
  else
     drwCanvas.Rectangle(t);
  {修改图形坐标}
  if flags=1 then
  begin
     m_x1:=x;
     m_y1:=y;
  end
  else if flags=2 then
  begin
     m_x1:=x;
     m_y2:=y;
  end
  else if flags=3 then
  begin
     m_x2:=x;
     m_y1:=y;
  end
  else if flags=4 then
  begin
     m_x2:=x;
     m_y2:=y;
  end
  else if flags=-1 then
  begin
     m_x1:=m_x1+x-m_oldx;
     m_y1:=m_y1+y-m_oldy;
     m_x2:=m_x2+x-m_oldx;
     m_y2:=m_y2+y-m_oldy;
     m_oldx:=x;
     m_oldy:=y;
  end;
  t.Left :=m_x1;t.Top :=m_y1;
  t.Right :=m_x2;t.Bottom :=m_y2;
  {进行图形坐标的缩放}
  t.TopLeft :=Point(round(m_x1*fZoomScale),round(m_y1*fZoomScale));
  t.BottomRight :=Point(round(m_x2*fZoomScale),round(m_y2*fZoomScale));

  {绘制新图形}
  if FIsRoundRect then
     drwCanvas.RoundRect(round(m_x1*fZoomScale),round(m_y1*fZoomScale),round(m_x2*fZoomScale),round(m_y2*fZoomScale),10,10)
  else
     drwCanvas.Rectangle(t);
  if mSelected then
  HotPoints(drwCanvas);
  {恢复默认值}
  {恢复画笔和画刷的原先设置}
  drwCanvas.Pen.Color :=oldPenColor;
  drwCanvas.Pen.Width :=oldPenWidth;
  drwCanvas.Pen.Mode :=oldPenMode;
  drwCanvas.Brush.Style :=oldBrushStyle;
  drwCanvas.Pen.Style :=oldPenStyle;
end;

function TDrawRect.NewPoint(x, y: Integer): integer;
begin
  m_x1:=x;m_x2:=x;