windows – Delphi：ListView(vsReport)单列标题标题与自定义字

发布时间：2020-12-13 22:44:37 所属栏目：Windows 来源：网络整理

导读：在带有vsReport ViewStyle的ListView中,如何自定义任何单列标题标题的字体颜色？例如(第二列标题标题具有红色字体颜色)：我将处理 NM_CUSTOMDRAW 标头通知代码,并在CDDS_ITEMPREPAINT呈现阶段使用CDRF_NEWFONT返回代码响应此通知消息.以下代码显示如何扩展

在带有vsReport ViewStyle的ListView中,如何自定义任何单列标题标题的字体颜色？例如(第二列标题标题具有红色字体颜色)：

我将处理 NM_CUSTOMDRAW标头通知代码,并在CDDS_ITEMPREPAINT呈现阶段使用CDRF_NEWFONT返回代码响应此通知消息.以下代码显示如何扩展列表视图控件以使用事件指定标题项字体颜色：

unit Unit1;

interface

uses
  Windows,Messages,SysUtils,Variants,Classes,Graphics,Controls,Forms,Dialogs,ComCtrls,CommCtrl,StdCtrls;

type
  TGetHeaderItemFontColorEvent = procedure(Sender: TCustomListView;
    ItemIndex: Integer; var FontColor: TColor) of object;
  TListView = class(ComCtrls.TListView)
  private
    FHeaderHandle: HWND;
    FOnGetHeaderItemFontColor: TGetHeaderItemFontColorEvent;
    procedure WMNotify(var AMessage: TWMNotify); message WM_NOTIFY;
  protected
    procedure CreateWnd; override;
  published
    property OnGetHeaderItemFontColor: TGetHeaderItemFontColorEvent read
      FOnGetHeaderItemFontColor write FOnGetHeaderItemFontColor;
  end;

type
  TForm1 = class(TForm)
    ListView1: TListView;
    procedure FormCreate(Sender: TObject);
  private
    procedure GetHeaderItemFontColor(Sender: TCustomListView;
      ItemIndex: Integer; var FontColor: TColor);
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

{ TListView }

procedure TListView.CreateWnd;
begin
  inherited;
  FHeaderHandle := ListView_GetHeader(Handle);
end;

procedure TListView.WMNotify(var AMessage: TWMNotify);
var
  FontColor: TColor;
  NMCustomDraw: TNMCustomDraw;
begin
  if (AMessage.NMHdr.hwndFrom = FHeaderHandle) and
    (AMessage.NMHdr.code = NM_CUSTOMDRAW) then
  begin
    NMCustomDraw := PNMCustomDraw(TMessage(AMessage).LParam)^;
    case NMCustomDraw.dwDrawStage of
      CDDS_PREPAINT:
        AMessage.Result := CDRF_NOTIFYITEMDRAW;
      CDDS_ITEMPREPAINT:
      begin
        FontColor := Font.Color;
        if Assigned(FOnGetHeaderItemFontColor) then
          FOnGetHeaderItemFontColor(Self,NMCustomDraw.dwItemSpec,FontColor);
        SetTextColor(NMCustomDraw.hdc,ColorToRGB(FontColor));
        AMessage.Result := CDRF_NEWFONT;
      end;
    else
      AMessage.Result := CDRF_DODEFAULT;
    end;
  end
  else
    inherited;
end;

{ TForm1 }

procedure TForm1.FormCreate(Sender: TObject);
begin
  ListView1.OnGetHeaderItemFontColor := GetHeaderItemFontColor;
end;

procedure TForm1.GetHeaderItemFontColor(Sender: TCustomListView;
  ItemIndex: Integer; var FontColor: TColor);
begin
  case ItemIndex of
    0: FontColor := clRed;
    1: FontColor := clGreen;
    2: FontColor := clBlue;
  end;
end;

end.

整个项目你可以download from here.这是上面例子的结果：

（编辑：李大同）

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