FMX TListboxItem 不显示字体颜色更改

FMX TListboxItem not showing Font color change

我在将自定义样式与 FMX TListBoxItem 结合使用时遇到以下问题。

在下面的代码中,我创建了四种新样式以用于 TListBoxItem。所有四种样式都显示一个框 (TRectangle),里面有或没有 X (TPath),右边有一个 TText。在其中两种样式中,我展示了 X,而另外两种则没有。一种样式显示带有 X 的绿色框和黑色粗体文本。一个显示一个只有黑色文本的空框。其他两个显示相同的内容,但框和文本是红色的,框内带有 X 的文本是粗体。

在程序中,我有一个列表框,在设计时添加了四个列表框项以显示四种不同的样式。我还有一个按钮,它将在运行时使用代码创建另外四个列表框项目,这些项目也显示四种不同的样式。所有这些都有效,除了一个细节。在运行时创建的两个红色列表框项不使用红色字体颜色。您可以在下图中看到这一点。 ListboxItem1 和 ListboxItem2 是在设计时创建的,并以红色文本显示。 “Item #1”和“Item #2”显示为黑色文本,但应为红色。注意:“项目 #2”确实正确显示了粗体文本。

在运行时创建 Listboxitems 时我错过了什么导致红色文本无法正确显示?

这是我正在使用的代码、表单和样式。

unit Unit3;

interface

uses
  System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants,
  FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs,
  FMX.Controls.Presentation, FMX.StdCtrls, FMX.ListBox, FMX.Layouts,
  FMX.ListView.Types, FMX.ListView.Appearances, FMX.ListView.Adapters.Base,
  FMX.ListView;

type
  TForm3 = class(TForm)
    lbxEquipment: TListBox;
    ListBoxItem1: TListBoxItem;
    btnAdd: TButton;
    StyleBook1: TStyleBook;
    ListBoxItem2: TListBoxItem;
    Button2: TButton;
    ListBoxItem3: TListBoxItem;
    ListBoxItem4: TListBoxItem;
    procedure btnAddClick(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
  public
  end;

var
  Form3: TForm3;

implementation

{$R *.fmx}

uses System.Rtti, FMX.Objects;

var
  i: integer = 1;
  cnt: integer = 1;
  fColor: TAlphaColor;
  bColor: TAlphaColor;

procedure TForm3.btnAddClick(Sender: TObject);
  var
    s: string;
    vItem: TListBoxItem;
    c: integer;

begin
  for c := cnt to (cnt + 3) do
    begin
      s := 'Item #' + IntToStr(c);
      vItem := TListBoxItem.Create(lbxEquipment);
      vItem.Parent := lbxEquipment;
      vItem.StyledSettings := vItem.StyledSettings - [TStyledSetting.FontColor];
      case I of
        1: vItem.StyleLookup := 'EquipItemRedOffStyle';
        2: vItem.StyleLookup := 'EquipItemRedOnStyle';
        3: vItem.StyleLookup := 'EquipItemOffStyle';
      else
        vItem.StyleLookup := 'EquipItemOnStyle';
      end;
      vItem.Text := s;
      Inc(i);
      if I > 3 then
        I := 0;
    end;
    cnt := c + 1;
end;

procedure TForm3.Button2Click(Sender: TObject);
begin
  lbxEquipment.Clear;
end;

end.
object Form3: TForm3
  Left = 0
  Top = 0
  ActiveControl = lbxEquipment
  Caption = 'Form3'
  ClientHeight = 284
  ClientWidth = 324
  StyleBook = StyleBook1
  FormFactor.Width = 320
  FormFactor.Height = 480
  FormFactor.Devices = [Desktop]
  DesignerMasterStyle = 0
  object lbxEquipment: TListBox
    Anchors = [akLeft, akTop, akRight, akBottom]
    Position.X = 24.000000000000000000
    Position.Y = 104.000000000000000000
    Size.Width = 281.000000000000000000
    Size.Height = 157.000000000000000000
    Size.PlatformDefault = False
    TabOrder = 0
    Columns = 2
    DisableFocusEffect = True
    ItemIndex = 0
    DefaultItemStyles.ItemStyle = ''
    DefaultItemStyles.GroupHeaderStyle = ''
    DefaultItemStyles.GroupFooterStyle = ''
    ShowCheckboxes = True
    Viewport.Width = 277.000000000000000000
    Viewport.Height = 153.000000000000000000
    object ListBoxItem1: TListBoxItem
      IsSelected = True
      StyleLookup = 'EquipItemRedOffStyle'
      TabOrder = 0
      Text = 'ListBoxItem1'
    end
    object ListBoxItem2: TListBoxItem
      Position.X = 138.000000000000000000
      StyleLookup = 'EquipItemRedOnStyle'
      TabOrder = 1
      Text = 'ListBoxItem2'
    end
    object ListBoxItem3: TListBoxItem
      Position.Y = 19.000000000000000000
      StyleLookup = 'EquipItemOffStyle'
      TabOrder = 2
      Text = 'ListBoxItem3'
    end
    object ListBoxItem4: TListBoxItem
      Position.X = 138.000000000000000000
      Position.Y = 19.000000000000000000
      StyleLookup = 'EquipItemOnStyle'
      TabOrder = 3
      Text = 'ListBoxItem4'
    end
  end
  object btnAdd: TButton
    Position.X = 24.000000000000000000
    Position.Y = 64.000000000000000000
    TabOrder = 1
    Text = 'Add'
    OnClick = btnAddClick
  end
  object StyleBook1: TStyleBook
    Styles = <
      item
      end
      item
        Platform = 'Windows 10 Desktop'
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      end>
    Left = 136
    Top = 16
  end
  object Button2: TButton
    Position.X = 200.000000000000000000
    Position.Y = 64.000000000000000000
    TabOrder = 5
    Text = 'Clear'
    OnClick = Button2Click
  end
end
object TStyleContainer
  object TLayout
    StyleName = 'EquipItemOffStyle'
    Align = Center
    Size.Width = 196.000000000000000000
    Size.Height = 19.000000000000000000
    Size.PlatformDefault = False
    Visible = False
    TabOrder = 37
    object TActiveStyleTextObject
      StyleName = 'text'
      Align = Client
      Margins.Left = 3.000000000000000000
      Margins.Top = 1.000000000000000000
      Margins.Right = 3.000000000000000000
      Margins.Bottom = 1.000000000000000000
      Size.Width = 172.000000000000000000
      Size.Height = 17.000000000000000000
      Size.PlatformDefault = False
      Text = 'Text'
      TextSettings.WordWrap = False
      TextSettings.HorzAlign = Leading
      ShadowVisible = False
      ActiveTrigger = Selected
      ActiveColor = claBlack
    end
    object TLayout
      Align = Left
      Locked = True
      Size.Width = 18.000000000000000000
      Size.Height = 19.000000000000000000
      Size.PlatformDefault = False
      TabOrder = 0
      object TRectangle
        StyleName = 'equipback'
        Align = Client
        Locked = True
        HitTest = False
        Margins.Left = 2.000000000000000000
        Margins.Top = 2.000000000000000000
        Margins.Right = 2.000000000000000000
        Margins.Bottom = 2.000000000000000000
        Size.Width = 14.000000000000000000
        Size.Height = 15.000000000000000000
        Size.PlatformDefault = False
        XRadius = 2.000000000000000000
        YRadius = 2.000000000000000000
        object TPath
          StyleName = 'equipcheck'
          Align = Client
          Data.Path = {
            04000000000000000000000000000000010000000000803F0000803F00000000
            000000000000803F010000000000803F00000000}
          Locked = True
          HitTest = False
          Margins.Left = 1.000000000000000000
          Margins.Top = 1.000000000000000000
          Margins.Right = 1.000000000000000000
          Margins.Bottom = 1.000000000000000000
          Size.Width = 12.000000000000000000
          Size.Height = 13.000000000000000000
          Size.PlatformDefault = False
          Stroke.Kind = None
          Stroke.Thickness = 2.000000000000000000
        end
      end
    end
  end
  object TLayout
    StyleName = 'EquipItemRedOnStyle'
    Align = Center
    Size.Width = 196.000000000000000000
    Size.Height = 19.000000000000000000
    Size.PlatformDefault = False
    Visible = False
    TabOrder = 36
    object TActiveStyleTextObject
      StyleName = 'text'
      Align = Client
      Margins.Left = 3.000000000000000000
      Margins.Top = 1.000000000000000000
      Margins.Right = 3.000000000000000000
      Margins.Bottom = 1.000000000000000000
      Size.Width = 172.000000000000000000
      Size.Height = 17.000000000000000000
      Size.PlatformDefault = False
      TextSettings.Font.StyleExt = {00070000000000000004000000}
      TextSettings.FontColor = claRed
      TextSettings.WordWrap = False
      TextSettings.HorzAlign = Leading
      ShadowVisible = False
      ActiveTrigger = Selected
      ActiveColor = claRed
    end
    object TLayout
      Align = Left
      Locked = True
      Size.Width = 18.000000000000000000
      Size.Height = 19.000000000000000000
      Size.PlatformDefault = False
      TabOrder = 0
      object TRectangle
        StyleName = 'equipback'
        Align = Client
        Fill.Color = claRed
        Locked = True
        HitTest = False
        Margins.Left = 2.000000000000000000
        Margins.Top = 2.000000000000000000
        Margins.Right = 2.000000000000000000
        Margins.Bottom = 2.000000000000000000
        Size.Width = 14.000000000000000000
        Size.Height = 15.000000000000000000
        Size.PlatformDefault = False
        XRadius = 2.000000000000000000
        YRadius = 2.000000000000000000
        object TPath
          StyleName = 'equipcheck'
          Align = Client
          Data.Path = {
            04000000000000000000000000000000010000000000803F0000803F00000000
            000000000000803F010000000000803F00000000}
          Locked = True
          HitTest = False
          Margins.Left = 1.000000000000000000
          Margins.Top = 1.000000000000000000
          Margins.Right = 1.000000000000000000
          Margins.Bottom = 1.000000000000000000
          Size.Width = 12.000000000000000000
          Size.Height = 13.000000000000000000
          Size.PlatformDefault = False
          Stroke.Thickness = 2.000000000000000000
        end
      end
    end
  end
  object TLayout
    StyleName = 'EquipItemOnStyle'
    Align = Center
    Size.Width = 196.000000000000000000
    Size.Height = 19.000000000000000000
    Size.PlatformDefault = False
    Visible = False
    TabOrder = 34
    object TActiveStyleTextObject
      StyleName = 'text'
      Align = Client
      Margins.Left = 3.000000000000000000
      Margins.Top = 1.000000000000000000
      Margins.Right = 3.000000000000000000
      Margins.Bottom = 1.000000000000000000
      Size.Width = 172.000000000000000000
      Size.Height = 17.000000000000000000
      Size.PlatformDefault = False
      TextSettings.Font.StyleExt = {00070000000000000004000000}
      TextSettings.WordWrap = False
      TextSettings.HorzAlign = Leading
      ShadowVisible = False
      ActiveTrigger = Selected
      ActiveColor = claBlack
    end
    object TLayout
      Align = Left
      Locked = True
      Size.Width = 18.000000000000000000
      Size.Height = 19.000000000000000000
      Size.PlatformDefault = False
      TabOrder = 0
      object TRectangle
        StyleName = 'equipback'
        Align = Client
        Fill.Color = claGreen
        Locked = True
        HitTest = False
        Margins.Left = 2.000000000000000000
        Margins.Top = 2.000000000000000000
        Margins.Right = 2.000000000000000000
        Margins.Bottom = 2.000000000000000000
        Size.Width = 14.000000000000000000
        Size.Height = 15.000000000000000000
        Size.PlatformDefault = False
        XRadius = 2.000000000000000000
        YRadius = 2.000000000000000000
        object TPath
          StyleName = 'equipcheck'
          Align = Client
          Data.Path = {
            04000000000000000000000000000000010000000000803F0000803F00000000
            000000000000803F010000000000803F00000000}
          Locked = True
          HitTest = False
          Margins.Left = 1.000000000000000000
          Margins.Top = 1.000000000000000000
          Margins.Right = 1.000000000000000000
          Margins.Bottom = 1.000000000000000000
          Size.Width = 12.000000000000000000
          Size.Height = 13.000000000000000000
          Size.PlatformDefault = False
          Stroke.Thickness = 2.000000000000000000
        end
      end
    end
  end
  object TLayout
    StyleName = 'EquipItemRedOffStyle'
    Align = Center
    Size.Width = 196.000000000000000000
    Size.Height = 19.000000000000000000
    Size.PlatformDefault = False
    Visible = False
    TabOrder = 35
    object TActiveStyleTextObject
      StyleName = 'text'
      Align = Client
      Margins.Left = 3.000000000000000000
      Margins.Top = 1.000000000000000000
      Margins.Right = 3.000000000000000000
      Margins.Bottom = 1.000000000000000000
      Size.Width = 172.000000000000000000
      Size.Height = 17.000000000000000000
      Size.PlatformDefault = False
      TextSettings.FontColor = claRed
      TextSettings.WordWrap = False
      TextSettings.HorzAlign = Leading
      ShadowVisible = False
      ActiveTrigger = Selected
      ActiveColor = claRed
    end
    object TLayout
      Align = Left
      Locked = True
      Size.Width = 18.000000000000000000
      Size.Height = 19.000000000000000000
      Size.PlatformDefault = False
      TabOrder = 0
      object TRectangle
        StyleName = 'equipback'
        Align = Client
        Fill.Color = claRed
        Locked = True
        HitTest = False
        Margins.Left = 2.000000000000000000
        Margins.Top = 2.000000000000000000
        Margins.Right = 2.000000000000000000
        Margins.Bottom = 2.000000000000000000
        Size.Width = 14.000000000000000000
        Size.Height = 15.000000000000000000
        Size.PlatformDefault = False
        XRadius = 2.000000000000000000
        YRadius = 2.000000000000000000
        object TPath
          StyleName = 'equipcheck'
          Align = Client
          Data.Path = {
            04000000000000000000000000000000010000000000803F0000803F00000000
            000000000000803F010000000000803F00000000}
          Locked = True
          HitTest = False
          Margins.Left = 1.000000000000000000
          Margins.Top = 1.000000000000000000
          Margins.Right = 1.000000000000000000
          Margins.Bottom = 1.000000000000000000
          Size.Width = 12.000000000000000000
          Size.Height = 13.000000000000000000
          Size.PlatformDefault = False
          Stroke.Kind = None
          Stroke.Thickness = 2.000000000000000000
        end
      end
    end
  end
end
four```

删除行

vItem.StyledSettings := vItem.StyledSettings - [TStyledSetting.FontColor];

您的文字在样式中是红色的,但您告诉它忽略样式的字体颜色!