PosLabel: TLabel;是显示行 列 号
unit Unit1; interface uses Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls, ComCtrls; type // Interjected Class TMemo = class(stdctrls.TMemo) private procedure WMPaint(var Message: TWMPaint); message WM_PAINT; procedure WMSize(var Message: TWMSize); message WM_SIZE; procedure WMMove(var Message: TWMMove); message WM_MOVE; procedure WMVScroll(var Message: TWMMove); message WM_VSCROLL; procedure WMMousewheel(var Message: TWMMove); message WM_MOUSEWHEEL; protected procedure Change; override; procedure KeyDown(var Key: Word; Shift: TShiftState); override; procedure KeyUp(var Key: Word; Shift: TShiftState); override; procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Integer); override; procedure MouseUp(Button: TMouseButton; Shift: TShiftState; X, Y: Integer); override; public PosLabel: TLabel; procedure Update_label; procedure GotoXY(mCol, mLine: Integer); function Line: Integer; function Col: Integer; function TopLine: Integer; function VisibleLines: Integer; end; TForm1 = class(TForm) Memo1: TMemo; Label1: TLabel; KeywordList: TListBox; procedure FormCreate(Sender: TObject); procedure Memo1KeyUp(Sender: TObject; var Key: Word; Shift: TShiftState); procedure FormClose(Sender: TObject; var Action: TCloseAction); private { Private declarations } public { Public declarations } end; var Form1: TForm1; implementation {$R *.DFM} //////////////////////////////////////////////////////////////////////////////// // functions for managing keywords and numbers of each line of TMemo /////////// //////////////////////////////////////////////////////////////////////////////// function IsSeparator(Car: Char): Boolean; begin case Car of '.', ';', ',', ':', '¡', '!', '·', '"', '''', '^', '+', '-', '*', '/', '\', '¨', ' ', '`', '[', ']', '(', ')', 'º', 'ª', '{', '}', '?', '¿', '%', '=': Result := True; else Result := False; end; end; //////////////////////////////////////////////////////////////////////////////// function NextWord(var s: string; var PrevWord: string): string; begin Result := ''; PrevWord := ''; if s = '' then Exit; while (s <> '') and IsSeparator(s[1]) do begin PrevWord := PrevWord + s[1]; Delete(s, 1,1); end; while (s <> '') and not IsSeparator(s[1]) do begin Result := Result + s[1]; Delete(s, 1,1); end; end; //////////////////////////////////////////////////////////////////////////////// function IsKeyWord(s: string): Boolean; begin Result := False; if s = '' then Exit; Result := Form1.KeywordList.Items.IndexOf(lowercase(s)) <> -1; end; //////////////////////////////////////////////////////////////////////////////// function IsNumber(s: string): Boolean; var i: Integer; begin Result := False; for i := 1 to Length(s) do case s[i] of '0'..'9':; else Exit; end; Result := True; end; //////////////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////////////// // New or overrided methods and properties for TMemo using Interjected Class /// // Technique /////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////////////// function TMemo.VisibleLines: Integer; begin Result := Height div (Abs(Self.Font.Height) + 2); end; //////////////////////////////////////////////////////////////////////////////// procedure TMemo.GotoXY(mCol, mLine: Integer); begin Dec(mLine); SelStart := 0; SelLength := 0; SelStart := mCol + Self.Perform(EM_LINEINDEX, mLine, 0); SelLength := 0; SetFocus; end; //////////////////////////////////////////////////////////////////////////////// procedure TMemo.Update_label; begin if PosLabel = nil then Exit; PosLabel.Caption := '(' + IntToStr(Line + 1) + ',' + IntToStr(Col) + ')'; end; //////////////////////////////////////////////////////////////////////////////// function TMemo.TopLine: Integer; begin Result := SendMessage(Self.Handle, EM_GETFIRSTVISIBLELINE, 0, 0); end; //////////////////////////////////////////////////////////////////////////////// function TMemo.Line: Integer; begin Result := SendMessage(Self.Handle, EM_LINEFROMCHAR, Self.SelStart, 0); end; //////////////////////////////////////////////////////////////////////////////// function TMemo.Col: Integer; begin Result := Self.SelStart - SendMessage(Self.Handle, EM_LINEINDEX, SendMessage(Self.Handle, EM_LINEFROMCHAR, Self.SelStart, 0), 0); end; //////////////////////////////////////////////////////////////////////////////// procedure TMemo.WMVScroll(var Message: TWMMove); begin Update_label; Invalidate; inherited; end; //////////////////////////////////////////////////////////////////////////////// procedure TMemo.WMSize(var Message: TWMSize); begin Invalidate; inherited; end; //////////////////////////////////////////////////////////////////////////////// procedure TMemo.WMMove(var Message: TWMMove); begin Invalidate; inherited; end; //////////////////////////////////////////////////////////////////////////////// procedure TMemo.WMMousewheel(var Message: TWMMove); begin Invalidate; inherited; end; //////////////////////////////////////////////////////////////////////////////// procedure TMemo.Change; begin Update_label; Invalidate; inherited Change; end; //////////////////////////////////////////////////////////////////////////////// procedure TMemo.KeyDown(var Key: Word; Shift: TShiftState); begin Update_label; inherited KeyDown(Key, Shift); end; //////////////////////////////////////////////////////////////////////////////// procedure TMemo.KeyUp(var Key: Word; Shift: TShiftState); begin Update_label; inherited KeyUp(Key, Shift); end; //////////////////////////////////////////////////////////////////////////////// procedure TMemo.MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Integer); begin Update_label; inherited MouseDown(Button, Shift, X, Y); end; //////////////////////////////////////////////////////////////////////////////// procedure TMemo.MouseUp(Button: TMouseButton; Shift: TShiftState; X, Y: Integer); begin Update_label; inherited MouseUp(Button, Shift, X, Y); end; //////////////////////////////////////////////////////////////////////////////// procedure TMemo.WMPaint(var Message: TWMPaint); var PS: TPaintStruct; DC: HDC; Canvas: TCanvas; i: Integer; X, Y: Integer; OldColor: TColor; Size: TSize; Max: Integer; s, Palabra, PrevWord: string; begin DC := Message.DC; if DC = 0 then DC := BeginPaint(Handle, PS); Canvas := TCanvas.Create; try OldColor := Font.Color; Canvas.Handle := DC; Canvas.Font.Name := Font.Name; Canvas.Font.Size := Font.Size; with Canvas do begin Max := TopLine + VisibleLines; if Max > Pred(Lines.Count) then Max := Pred(Lines.Count); //Limpio la sección visible Brush.Color := Self.Color; FillRect(Self.ClientRect); Y := 1; for i := TopLine to Max do begin X := 2; s := Lines[i]; //Detecto todas las palabras de esta línea Palabra := NextWord(s, PrevWord); while Palabra <> '' do begin Font.Color := OldColor; TextOut(X, Y, PrevWord); GetTextExtentPoint32(DC, PChar(PrevWord), Length(PrevWord), Size); Inc(X, Size.cx); Font.Color := clBlack; if IsKeyWord(Palabra) then begin Font.Color := clHighlight; TextOut(X, Y, Palabra); { //Draw dot underline Pen.Color := clHighlight; Pen.Style := psDot; PolyLine([ Point(X,Y+13), Point(X+TextWidth(Palabra),Y+13)]); } end else if IsNumber(Palabra) then begin Font.Color := $000000DD; TextOut(X, Y, Palabra); end else TextOut(X, Y, Palabra); GetTextExtentPoint32(DC, PChar(Palabra), Length(Palabra), Size); Inc(X, Size.cx); Palabra := NextWord(s, PrevWord); if (s = '') and (PrevWord <> '') then begin Font.Color := OldColor; TextOut(X, Y, PrevWord); end; end; if (s = '') and (PrevWord <> '') then begin Font.Color := OldColor; TextOut(X, Y, PrevWord); end; s := 'W'; GetTextExtentPoint32(DC, PChar(s), Length(s), Size); Inc(Y, Size.cy); end; end; finally if Message.DC = 0 then EndPaint(Handle, PS); end; Canvas.Free; inherited; end; //////////////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////////////// // Procedures for Form1 //////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////////////// procedure TForm1.FormCreate(Sender: TObject); begin Memo1.PosLabel := Label1; Memo1.Update_label; end; //////////////////////////////////////////////////////////////////////////////// procedure TForm1.Memo1KeyUp(Sender: TObject; var Key: Word; Shift: TShiftState); begin if Key = VK_F1 then Memo1.Invalidate; end; //////////////////////////////////////////////////////////////////////////////// procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction); begin Action := caFree; end; //////////////////////////////////////////////////////////////////////////////// end.
标签:begin,end,TMemo,着色,关键字,var,Integer,procedure From: https://www.cnblogs.com/tulater/p/18163390