TdxChartPalette.Count Property

Returns the number of explicitly defined (stored) standard palette items.

Declaration

delphi

property Count: Integer read;

Property Value

Type	Description
Integer

The number of stored standard palette items accessible through the Items property.

Remarks

You can use the Count property to iterate through all items in the standard palette.

If the palette does not have enough stored colors to draw all affected series or series values differently, the Chart control generates interpolated colors based on explicitly defined colors.

Code Example: Copy Standard Palette Colors to a User Palette

The following code example creates a custom palette based on one of the predefined palettes and applies the created palette to a Chart control:

Delphi
C++

delphi

var
  AStandardPalette: TdxChartPalette;
  AChartPalette: TdxChartUserPalette;
  APaletteItems: TdxChartPaletteItems; // A dynamic array of palette items used as a temporary container
  I: Integer;
begin
  AStandardPalette := TdxChartStandardPaletteRepository.FindPalette('Nature Colors');
  if AStandardPalette = nil then Exit;
  SetLength(APaletteItems, AStandardPalette.Count);
  // Copies all colors from the obtained color palette into the defined dynamic array
  for I := 0 to AStandardPalette.Count - 1 do
    APaletteItems[I] := AStandardPalette.Items[I];
  AChartPalette := dxChartPaletteRepository1.CreateItem('My Palette 1', APaletteItems);
  // Replaces the third palette item
  AChartPalette.Items[2] := TdxChartPaletteItem.Create(TdxAlphaColors.Red);
  // Adds a new palette item
  AChartPalette.Count := AChartPalette.Count + 1; // Increments the size of the palette item array
  AChartPalette.Items[AChartPalette.Count - 1] := TdxChartPaletteItem.Create(TdxAlphaColors.LightGreen);
  dxChartControl1.Palette := AChartPalette; // Assigns the created palette to a TdxChartControl instance
end;

cpp

TdxChartPalette *AStandardPalette;
  TdxChartUserPalette *AChartPalette;
  TdxChartPaletteItems *APaletteItems; // A dynamic array of palette items used as a temporary container
  // ...
  AStandardPalette = TdxChartStandardPaletteRepository->FindPalette("Nature Colors");
  if (AStandardPalette == nullptr) { return; }
  SetLength(APaletteItems, AStandardPalette->Count);
  // Copies all colors from the obtained color palette into the defined dynamic array
  for(int i = 0; i < AStandardPalette->Count; i++)
    APaletteItems[i] = AStandardPalette->Items[i];
  AChartPalette = dxChartPaletteRepository1->CreateItem("My Palette 1", APaletteItems);
  // Replaces the third palette item
  AChartPalette->Items[2] = TdxChartPaletteItem(TdxAlphaColors::Red);
  // Adds a new palette item
  AChartPalette->Count = AChartPalette->Count + 1; // Increments the size of the palette item array
  AChartPalette->Items[AChartPalette->Count - 1] = TdxChartPaletteItem(TdxAlphaColors::LightGreen);
  dxChartControl1->Palette = AChartPalette; // Assigns the created palette to a TdxChartControl instance