93 lines
2.4 KiB
ObjectPascal
93 lines
2.4 KiB
ObjectPascal
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{
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:: X2UtPersistVirtualTree provides functions to read and write VirtualTree
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:: settings.
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::
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:: Last changed: $Date$
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:: Revision: $Rev$
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:: Author: $Author$
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}
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unit X2UtPersistVirtualTree;
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interface
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uses
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VirtualTrees,
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X2UtPersistIntf;
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procedure ReadVTHeader(const AReader: IX2PersistReader; const AHeader: TVTHeader);
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procedure WriteVTHeader(const AWriter: IX2PersistWriter; const AHeader: TVTHeader);
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implementation
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uses
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SysUtils;
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procedure ReadVTHeader(const AReader: IX2PersistReader; const AHeader: TVTHeader);
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var
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sortColumn: Integer;
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sortAscending: Boolean;
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columnIndex: Integer;
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column: TVirtualTreeColumn;
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keyPrefix: String;
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position: Integer;
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width: Integer;
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visible: Boolean;
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begin
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if AReader.ReadInteger('SortColumn', sortColumn) then
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AHeader.SortColumn := sortColumn;
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if AReader.ReadBoolean('SortAscending', sortAscending) then
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begin
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if sortAscending then
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AHeader.SortDirection := sdAscending
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else
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AHeader.SortDirection := sdDescending;
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end;
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for columnIndex := 0 to Pred(AHeader.Columns.Count) do
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begin
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column := AHeader.Columns[columnIndex];
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keyPrefix := IntToStr(columnIndex) + '.';
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if AReader.ReadInteger(keyPrefix + 'Position', position) then
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column.Position := position;
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if AReader.ReadInteger(keyPrefix + 'Width', width) then
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column.Width := width;
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if AReader.ReadBoolean(keyPrefix + 'Visible', visible) then
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begin
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if visible then
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column.Options := column.Options + [coVisible]
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else
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column.Options := column.Options - [coVisible];
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end;
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end;
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end;
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procedure WriteVTHeader(const AWriter: IX2PersistWriter; const AHeader: TVTHeader);
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var
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columnIndex: Integer;
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keyPrefix: String;
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begin
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AWriter.WriteInteger('SortColumn', AHeader.SortColumn);
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AWriter.WriteBoolean('SortAscending', (AHeader.SortDirection = sdAscending));
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for columnIndex := 0 to Pred(AHeader.Columns.Count) do
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with AHeader.Columns[columnIndex] do
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begin
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keyPrefix := IntToStr(columnIndex) + '.';
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AWriter.WriteInteger(keyPrefix + 'Position', Position);
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AWriter.WriteInteger(keyPrefix + 'Width', Width);
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AWriter.WriteBoolean(keyPrefix + 'Visible', coVisible in Options);
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end;
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end;
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end.
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