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FMXTListboxItem不顯示字體顏色變化

2022-03-28 14:57:06 企業開發

我在使用帶有 FMX TListBoxItem 的自定義樣式時遇到以下問題。

在下面的代碼中,我創建了四種新樣式以在 TListBoxItem 中使用。所有四種樣式都顯示一個帶有或不帶有 X (TPath) 的框 (TRectangle),并在其右側顯示一個 TText。在其中兩種樣式中,我展示了 X,而另外兩種我沒有展示。一種樣式顯示帶有 X 和黑色粗體文本的綠色框。一個顯示一個只有黑色文本的空框。另外兩個顯示相同的內容,但方框和文本是紅色的,方框中帶有 X 的文本是粗體。

在程式中,我有一個串列框,其中包含在設計時添加的四個串列框項,以顯示四種不同的樣式。我還有一個按鈕,它將在運行時創建另外四個帶有代碼的串列框項,它們也顯示四種不同的樣式。所有這些都有效,除了一個細節。在運行時創建的兩個紅色串列框項不使用紅色字體顏色。您可以在下圖中看到這一點。ListboxItem1 和 ListboxItem2 是作為設計時創建的,并以紅色文本顯示。“Item #1”和“Item #2”以黑色文本顯示,但應為紅色。注意:“Item #2”確實正確顯示了粗體文本。

在運行時創建 Listboxitems 導致紅色文本無法正確顯示時,我錯過了什么?

FMX TListboxItem 不顯示字體顏色變化

這是我正在使用的代碼、表單和樣式。

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'
        ResourcesBin = {
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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```

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

您的文字在樣式中是紅色的,但您告訴它忽略樣式的字體顏色!

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