130 lines
2.9 KiB
ObjectPascal
130 lines
2.9 KiB
ObjectPascal
unit FBTree;
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interface
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uses
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Forms,
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Classes,
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Controls,
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Windows,
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dxorgchr,
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X2UtBinaryTree;
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type
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TfrmBTree = class(TForm)
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ocTree: TdxOrgChart;
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procedure ocTreeDblClick(Sender: TObject);
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private
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FTree: TX2UtCustomBTree;
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protected
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procedure BuildTree(const ARoot: PX2UtBTreeNode;
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const AParent: TdxOcNode = nil);
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public
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class procedure Execute(const ATree: TX2UtCustomBTree;
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const AShowModal: Boolean = True);
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end;
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implementation
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uses
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Graphics,
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SysUtils,
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TypInfo;
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type
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THackBTree = class(TX2UtCustomBTree);
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{$R *.dfm}
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class procedure TfrmBTree.Execute;
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begin
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with TfrmBTree.Create(nil) do
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try
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FTree := ATree;
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BuildTree(THackBTree(ATree).Root);
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if Assigned(ocTree.RootNode) then
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ocTree.RootNode.Expand(True);
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if AShowModal then
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ShowModal()
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else
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Show();
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finally
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// Yes, yes, memory leak I know. Should have an owner of something. Anyways,
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// I'm too lazy to fix it in this test application...
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if AShowModal then
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Free();
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end;
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end;
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procedure TfrmBTree.BuildTree;
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function CreateTextNode(const AParent: TdxOcNode;
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const AText: String): TdxOcNode;
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begin
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Result := ocTree.AddChild(AParent, nil);
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Result.Text := AText;
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Result.Color := clInfoBk;
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end;
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function CreateNode(const AParent: TdxOcNode;
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const ANode: PX2UtBTreeNode): TdxOcNode;
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begin
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Result := CreateTextNode(AParent, IntToStr(ANode^.Index) + #13#10 +
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IntToStr(ANode^.Balance));
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Result.Data := ANode;
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end;
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var
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pNode: TdxOcNode;
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pLeft: TdxOcNode;
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pRight: TdxOcNode;
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begin
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if not Assigned(ARoot) then
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exit;
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pLeft := nil;
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pRight := nil;
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if not Assigned(AParent) then
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pNode := CreateNode(nil, ARoot)
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else
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pNode := AParent;
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if Assigned(ARoot^.Children[0]) then
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pLeft := CreateNode(pNode, ARoot^.Children[0])
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else if Assigned(ARoot^.Children[1]) then
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CreateTextNode(pNode, '<nil>');
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if Assigned(ARoot^.Children[1]) then
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pRight := CreateNode(pNode, ARoot^.Children[1])
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else if Assigned(ARoot^.Children[0]) then
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CreateTextNode(pNode, '<nil>');
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if Assigned(ARoot^.Children[0]) then
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BuildTree(ARoot^.Children[0], pLeft);
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if Assigned(ARoot^.Children[1]) then
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BuildTree(ARoot^.Children[1], pRight);
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end;
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procedure TfrmBTree.ocTreeDblClick;
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var
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pNode: TdxOcNode;
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begin
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pNode := ocTree.Selected;
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if Assigned(pNode) and Assigned(pNode.Data) then
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begin
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FTree.Delete(PX2UtBTreeNode(pNode.Data)^.Index);
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ocTree.Clear();
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BuildTree(THackBTree(FTree).Root);
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if Assigned(ocTree.RootNode) then
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ocTree.RootNode.Expand(True);
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end;
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end;
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end.
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