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如何绘制节点内联TvirualTree?(how to draw nodes inline in T

2019-09-28 15:14发布

我目前正在起草中的一些图像Tvirtualdrawtree使用油漆前。 这里是我的绘制代码

procedure TForm2.VDTAniBeforeCellPaint(Sender: TBaseVirtualTree;
  TargetCanvas: TCanvas; Node: PVirtualNode; Column: TColumnIndex;
  CellPaintMode: TVTCellPaintMode; CellRect: TRect; var ContentRect: TRect);
var
  Data: PAnimeData;
  NewRect: TRect;
  R: TRect;
begin
//
  if not Assigned(Node) then
  begin
    exit;
  end;

  Data := VDTAni.GetNodeData(Node);

  case Column of
    0, 1 ,2, 3, 4, 5, 6, 7:
  begin
  TargetCanvas.Brush.Style := bsClear;
  TargetCanvas.FillRect(CellRect);
  NewRect := ContentRect;
  NewRect.Left := NewRect.Left;
  NewRect.Width := 55;
  NewRect.Height := 55;
  NewRect.Top := NewRect.Top + 2;
  NewRect.Bottom := NewRect.Bottom;

  if Column = 0 then
  begin

    with NewRect do
    begin
      TargetCanvas.StretchDraw( NewRect, Data.FObject.anmigraphic);
    end;

  end;
end;

绘制的图像来垂直。 我想向他们展示水平例如在这个下面的图片

下面是数据结构

type
  TAnmiClass = class
  private
    Fanmigraphic : TGifImage;

  public
    property anmigraphic: TGifImage read Fanmigraphic write Fanmigraphic;

  public
    constructor Create;
    destructor Destroy; override;
  end;

type
  PAnimeData = ^TAnimeData;

  TAnimeData = record
    FObject: TAnmiClass;
  end;

Answer 1:

你说:

绘制的图像来垂直

那是因为你只画如果列是0:

if Column = 0 then
begin
  with NewRect do
  begin
    TargetCanvas.StretchDraw( NewRect, Data.FObject.anmigraphic);
  end;
end;

你没有显示的结构Data ,但我怀疑你在每个多个图像Data 。 它不能从您的代码确定,你如何能够解决所不同的图像,让我表明,部分只作为伪码一对<>

如果你想在不同的列绘制不同的图像,我建议是这样的:

case Column of
  0: TargetCanvas.StretchDraw( NewRect, Data.FObject.anmigraphic);
  1: TargetCanvas.StretchDraw( NewRect, Data.FObject.<reference to second image>);

  7: TargetCanvas.StretchDraw( NewRect, Data.FObject.<reference to eight image>);
end;

代替上面显示的代码。



文章来源: how to draw nodes inline in TvirualTree?