unitasgrids.pas

仿速达界面控件

{*******************************************************

仿速达DBGrid制作的CustonNewGrid

By wr960204 王锐

2004/8/8

*******************************************************}

unit UnitASGrids;

{$R-,T-,H+,X+}

interface

uses
  UnitASBase, Dialogs, UnitASInplaceEditBase,
  Messages, Windows, SysUtils, Classes, UnitASUtils,
  Variants, Graphics, Menus, Controls, Forms, StdCtrls, Mask;

const
  MaxCustomExtents = MaxListSize;
  MaxShortInt = High(ShortInt);

type
  EInvalidGridOperation = class(Exception);

  { Internal grid types }
  TGetExtentsFunc = function(Index: Longint): Integer of object;

  TGridAxisDrawInfo = record
    EffectiveLineWidth: Integer;
    FixedBoundary: Integer;
    GridBoundary: Integer;
    GridExtent: Integer;
    LastFullVisibleCell: Longint;
    FullVisBoundary: Integer;
    FixedCellCount: Integer;
    FirstGridCell: Integer;
    GridCellCount: Integer;
    GetExtent: TGetExtentsFunc;
  end;

  TGridDrawInfo = record
    Horz, Vert: TGridAxisDrawInfo;
  end;

  TGridState = (gsNormal, gsSelecting, gsRowSizing, gsColSizing,
    gsRowMoving, gsColMoving);
  TGridMovement = gsRowMoving..gsColMoving;

  { TInplaceEdit }
  { The inplace editor is not intended to be used outside the grid }

  TCustomASGrid = class;

  TInplaceEdit = class(TCustomASInplaceEditBase)
  private
    FGrid: TCustomASGrid;
    FClickTime: Longint;
    procedure InternalMove(const Loc: TRect; Redraw: Boolean);
    procedure CMShowingChanged(var Message: TMessage); message
      CM_SHOWINGCHANGED;
    procedure WMGetDlgCode(var Message: TWMGetDlgCode); message WM_GETDLGCODE;
    procedure WMPaste(var Message); message WM_PASTE;
    procedure WMCut(var Message); message WM_CUT;
    procedure WMClear(var Message); message WM_CLEAR;

  protected
    procedure CreateParams(var Params: TCreateParams); override;
    procedure DblClick; override;
    function DoMouseWheel(Shift: TShiftState; WheelDelta: Integer;
      MousePos: TPoint): Boolean; override;
    function EditCanModify: Boolean; override;
    procedure KeyDown(var Key: Word; Shift: TShiftState); override;
    procedure KeyPress(var Key: Char); override;
    procedure KeyUp(var Key: Word; Shift: TShiftState); override;
    procedure BoundsChanged; virtual;
    procedure UpdateContents; virtual;
    procedure WndProc(var Message: TMessage); override;
    procedure SetGrid(Value: TCustomASGrid);
    property Grid: TCustomASGrid read FGrid;
  public
    constructor Create(AOwner: TComponent); override;

    procedure Deselect;
    procedure Hide;
    procedure Invalidate; reintroduce;
    procedure Move(const Loc: TRect);
    function PosEqual(const Rect: TRect): Boolean;
    procedure SetFocus; override; //reintroduce;
    procedure UpdateLoc(const Loc: TRect);
    function Visible: Boolean;

    property ChineseCurrency;
  end;

  { TCustomASGrid }

  TGridOption = (goFixedVertLine, goFixedHorzLine, goVertLine, goHorzLine,
    goRangeSelect, goDrawFocusSelected, goRowSizing, goColSizing, goRowMoving,
    goColMoving, goEditing, goTabs, goRowSelect,
    goAlwaysShowEditor, goThumbTracking);
  TGridOptions = set of TGridOption;
  TGridDrawState = set of (gdSelected, gdFocused, gdFixed);
  TGridScrollDirection = set of (sdLeft, sdRight, sdUp, sdDown);

  TGridCoord = record
    X: Longint;
    Y: Longint;
  end;

  TGridRect = record
    case Integer of
      0: (Left, Top, Right, Bottom: Longint);
      1: (TopLeft, BottomRight: TGridCoord);
  end;

  TEditStyle = (esSimple, esEllipsis, esPickList);

  TSelectCellEvent = procedure(Sender: TObject; ACol, ARow: Longint;
    var CanSelect: Boolean) of object;
  TDrawCellEvent = procedure(Sender: TObject; ACol, ARow: Longint;
    Rect: TRect; State: TGridDrawState) of object;

  TCustomASGrid = class(TASBase)
  private
    FAnchor: TGridCoord;
    FBorderStyle: TBorderStyle;
    FColCount: Longint;
    FColWidths: Pointer;
    FColFixed: Pointer;
    FTabStops: Pointer;
    FCurrent: TGridCoord;
    FDefaultColWidth: Integer;
    FDefaultRowHeight: Integer;
    FFixedCols: Integer;
    FFixedRows: Integer;
    FFixedColor: TColor;
    FGridLineWidth: Integer;
    FOptions: TGridOptions;
    FRowCount: Longint;
    FRowHeights: Pointer;
    FScrollBars: TScrollStyle;
    FTopLeft: TGridCoord;
    FSizingIndex: Longint;
    FSizingPos, FSizingOfs: Integer;
    FMoveIndex, FMovePos: Longint;
    FHitTest: TPoint;

    FColOffset: Integer;
    FDefaultDrawing: Boolean;
    FEditorMode: Boolean;
    function CalcCoordFromPoint(X, Y: Integer;
      const DrawInfo: TGridDrawInfo): TGridCoord;
    procedure CalcDrawInfoXY(var DrawInfo: TGridDrawInfo;
      UseWidth, UseHeight: Integer);
    function CalcMaxTopLeft(const Coord: TGridCoord;
      const DrawInfo: TGridDrawInfo): TGridCoord;
    procedure CancelMode;
    procedure ChangeSize(NewColCount, NewRowCount: Longint);
    procedure ClampInView(const Coord: TGridCoord);
    procedure DrawSizingLine(const DrawInfo: TGridDrawInfo);
    procedure DrawMove;
    procedure GridRectToScreenRect(GridRect: TGridRect;
      var ScreenRect: TRect; IncludeLine: Boolean);
    procedure Initialize;
    procedure InvalidateRect(ARect: TGridRect);
    procedure ModifyScrollBar(ScrollBar, ScrollCode, Pos: Cardinal;
      UseRightToLeft: Boolean);
    procedure MoveAdjust(var CellPos: Longint; FromIndex, ToIndex: Longint);
    procedure MoveAnchor(const NewAnchor: TGridCoord);
    procedure MoveAndScroll(Mouse, CellHit: Integer; var DrawInfo:
      TGridDrawInfo;
      var Axis: TGridAxisDrawInfo; Scrollbar: Integer; const MousePt: TPoint);
    procedure MoveCurrent(ACol, ARow: Longint; MoveAnchor, Show: Boolean);
    procedure MoveTopLeft(ALeft, ATop: Longint);
    procedure ResizeCol(Index: Longint; OldSize, NewSize: Integer);
    procedure ResizeRow(Index: Longint; OldSize, NewSize: Integer);
    procedure SelectionMoved(const OldSel: TGridRect);
    procedure ScrollDataInfo(DX, DY: Integer; var DrawInfo: TGridDrawInfo);
    procedure TopLeftMoved(const OldTopLeft: TGridCoord);
    procedure UpdateScrollPos;
    procedure UpdateScrollRange;
    procedure UpdateText;
    function GetColWidths(Index: Longint): Integer;
    function GetRowHeights(Index: Longint): Integer;
    function GetSelection: TGridRect;
    function GetTabStops(Index: Longint): Boolean;
    function GetVisibleColCount: Integer;
    function GetVisibleRowCount: Integer;
    function IsActiveControl: Boolean;
    procedure ReadColWidths(Reader: TReader);
    procedure ReadRowHeights(Reader: TReader);
    procedure SetBorderStyle(Value: TBorderStyle);
    procedure SetCol(Value: Longint);
    procedure SetColCount(Value: Longint);
    procedure SetColWidths(Index: Longint; Value: Integer);
    procedure SetDefaultColWidth(Value: Integer);
    procedure SetDefaultRowHeight(Value: Integer);
    procedure SetEditorMode(Value: Boolean);
    procedure SetFixedColor(Value: TColor);
    procedure SetFixedCols(Value: Integer);
    procedure SetFixedRows(Value: Integer);
    procedure SetGridLineWidth(Value: Integer);
    procedure SetLeftCol(Value: Longint);
    procedure SetOptions(Value: TGridOptions);
    procedure SetRow(Value: Longint);
    procedure SetRowCount(Value: Longint);
    procedure SetRowHeights(Index: Longint; Value: Integer);
    procedure SetScrollBars(Value: TScrollStyle);
    procedure SetSelection(Value: TGridRect);
    procedure SetTabStops(Index: Longint; Value: Boolean);
    procedure SetTopRow(Value: Longint);
    procedure WriteColWidths(Writer: TWriter);
    procedure WriteRowHeights(Writer: TWriter);
    procedure CMCancelMode(var Msg: TMessage); message CM_CANCELMODE;
    procedure CMFontChanged(var Message: TMessage); message CM_FONTCHANGED;
    procedure CMCtl3DChanged(var Message: TMessage); message CM_CTL3DCHANGED;
    procedure CMDesignHitTest(var Msg: TCMDesignHitTest); message
      CM_DESIGNHITTEST;
    procedure CMWantSpecialKey(var Msg: TCMWantSpecialKey); message
      CM_WANTSPECIALKEY;
    procedure CMShowingChanged(var Message: TMessage); message
      CM_SHOWINGCHANGED;
    procedure WMChar(var Msg: TWMChar); message WM_CHAR;
    procedure WMCancelMode(var Msg: TWMCancelMode); message WM_CANCELMODE;
    procedure WMCommand(var Message: TWMCommand); message WM_COMMAND;
    procedure WMGetDlgCode(var Msg: TWMGetDlgCode); message WM_GETDLGCODE;
    procedure WMHScroll(var Msg: TWMHScroll); message WM_HSCROLL;
    procedure WMKillFocus(var Msg: TWMKillFocus); message WM_KILLFOCUS;
    procedure WMLButtonDown(var Message: TMessage); message WM_LBUTTONDOWN;
    procedure WMNCHitTest(var Msg: TWMNCHitTest); message WM_NCHITTEST;
    procedure WMSetCursor(var Msg: TWMSetCursor); message WM_SETCURSOR;
    procedure WMSetFocus(var Msg: TWMSetFocus); message WM_SETFOCUS;
    procedure WMSize(var Msg: TWMSize); message WM_SIZE;
    procedure WMTimer(var Msg: TWMTimer); message WM_TIMER;
    procedure WMVScroll(var Msg: TWMVScroll); message WM_VSCROLL;
  protected
    FCanEditModify: Boolean;
    FGridState: TGridState;
    FInplaceCol, FInplaceRow: Longint;
    FInplaceEdit: TInplaceEdit;
    FSaveCellExtents: Boolean;
    DesignOptionsBoost: TGridOptions;
    VirtualView: Boolean;
    procedure CalcDrawInfo(var DrawInfo: TGridDrawInfo);
    procedure CalcFixedInfo(var DrawInfo: TGridDrawInfo);
    procedure CalcSizingState(X, Y: Integer; var State: TGridState;
      var Index: Longint; var SizingPos, SizingOfs: Integer;
      var FixedInfo: TGridDrawInfo); virtual;
    procedure ChangeGridOrientation(RightToLeftOrientation: Boolean);
    function CreateEditor: TInplaceEdit; virtual;
    procedure CreateParams(var Params: TCreateParams); override;
    procedure KeyDown(var Key: Word; Shift: TShiftState); override;
    procedure KeyPress(var Key: Char); override;
    procedure MouseDown(Button: TMouseButton; Shift: TShiftState;
      X, Y: Integer); override;
    procedure MouseMove(Shift: TShiftState; X, Y: Integer); override;
    procedure MouseUp(Button: TMouseButton; Shift: TShiftState;
      X, Y: Integer); override;
    procedure AdjustSize(Index, Amount: Longint; Rows: Boolean); reintroduce;
      dynamic;
    function BoxRect(ALeft, ATop, ARight, ABottom: Longint): TRect;
    procedure DoExit; override;
    function CellRect(ACol, ARow: Longint): TRect;
    function CanEditAcceptKey(Key: Char): Boolean; dynamic;
    function CanGridAcceptKey(Key: Word; Shift: TShiftState): Boolean; dynamic;
    function CanEditModify: Boolean; dynamic;
    function CanEditShow: Boolean; virtual;
    function DoMouseWheelDown(Shift: TShiftState; MousePos: TPoint): Boolean;
      override;
    function DoMouseWheelUp(Shift: TShiftState; MousePos: TPoint): Boolean;
      override;
    procedure FocusCell(ACol, ARow: Longint; MoveAnchor: Boolean); virtual;
    function GetEditText(ACol, ARow: Longint): string; dynamic;
    procedure SetEditText(ACol, ARow: Longint; const Value: string); dynamic;
    function GetEditLimit: Integer; dynamic;
    function GetEditMask(ACol, ARow: Longint): string; dynamic;
    function GetEditStyle(ACol, ARow: Longint): TEditStyle; dynamic;
    function GetGridWidth: Integer;
    function GetGridHeight: Integer;
    procedure HideEdit; virtual;
    procedure HideEditor; virtual;
    procedure ShowEditor; virtual;
    procedure ShowEditorChar(Ch: Char); virtual;
    procedure InvalidateEditor;
    procedure InvalidateGrid;
    procedure MoveColumn(FromIndex, ToIndex: Longint);
    procedure ColumnMoved(FromIndex, ToIndex: Longint); dynamic;
    procedure MoveRow(FromIndex, ToIndex: Longint);
    procedure RowMoved(FromIndex, ToIndex: Longint); dynamic;
    procedure DrawCell(ACol, ARow: Longint; ARect: TRect;
      AState: TGridDrawState); virtual; abstract;
    procedure DefineProperties(Filer: TFiler); override;
    procedure MoveColRow(ACol, ARow: Longint; MoveAnchor, Show: Boolean);
    function SelectCell(ACol, ARow: Longint): Boolean; virtual;
    procedure SizeChanged(OldColCount, OldRowCount: Longint); dynamic;
    function Sizing(X, Y: Integer): Boolean;
    procedure ScrollData(DX, DY: Integer);
    procedure InvalidateCell(ACol, ARow: Longint);
    procedure InvalidateCol(ACol: Longint);
    procedure InvalidateRow(ARow: Longint);
    procedure TopLeftChanged; dynamic;
    procedure TimedScroll(Direction: TGridScrollDirection); dynamic;
    procedure Paint; override;
    procedure ColWidthsChanged; dynamic;
    procedure RowHeightsChanged; dynamic;
    procedure DeleteColumn(ACol: Longint); virtual;
    procedure DeleteRow(ARow: Longint); virtual;
    procedure UpdateDesigner;
    procedure UpdateEdit; virtual;
    function BeginColumnDrag(var Origin, Destination: Integer;
      const MousePt: TPoint): Boolean; dynamic;
    function BeginRowDrag(var Origin, Destination: Integer;
      const MousePt: TPoint): Boolean; dynamic;
    function CheckColumnDrag(var Origin, Destination: Integer;
      const MousePt: TPoint): Boolean; dynamic;
    function CheckRowDrag(var Origin, Destination: Integer;
      const MousePt: TPoint): Boolean; dynamic;
    function EndColumnDrag(var Origin, Destination: Integer;
      const MousePt: TPoint): Boolean; dynamic;
    function EndRowDrag(var Origin, Destination: Integer;
      const MousePt: TPoint): Boolean; dynamic;
    property BorderStyle: TBorderStyle read FBorderStyle write SetBorderStyle
      default bsSingle;
    property Col: Longint read FCurrent.X write SetCol;
    property Color default clWindow;
    property ColCount: Longint read FColCount write SetColCount default 5;
    property ColWidths[Index: Longint]: Integer read GetColWidths write
    SetColWidths;
    property DefaultColWidth: Integer read FDefaultColWidth write
      SetDefaultColWidth default 64;
    property DefaultDrawing: Boolean read FDefaultDrawing write FDefaultDrawing
      default True;
    property DefaultRowHeight: Integer read FDefaultRowHeight write
      SetDefaultRowHeight default 24;
    property EditorMode: Boolean read FEditorMode write SetEditorMode;
    property FixedColor: TColor read FFixedColor write SetFixedColor default
      clBtnFace;
    property FixedCols: Integer read FFixedCols write SetFixedCols default 1;
    property FixedRows: Integer read FFixedRows write SetFixedRows default 1;
    property GridHeight: Integer read GetGridHeight;
    property GridLineWidth: Integer read FGridLineWidth write SetGridLineWidth
      default 1;
    property GridWidth: Integer read GetGridWidth;
    property HitTest: TPoint read FHitTest;
    property InplaceEditor: TInplaceEdit read FInplaceEdit;
    property LeftCol: Longint read FTopLeft.X write SetLeftCol;
    property Options: TGridOptions read FOptions write SetOptions
      default [goFixedVertLine, goFixedHorzLine, goVertLine, goHorzLine,
      goRangeSelect];
    property ParentColor default False;
    property Row: Longint read FCurrent.Y write SetRow;
    property RowCount: Longint read FRowCount write SetRowCount default 5;
    property RowHeights[Index: Longint]: Integer read GetRowHeights write
    SetRowHeights;
    property ScrollBars: TScrollStyle read FScrollBars write SetScrollBars
      default ssBoth;
    property Selection: TGridRect read GetSelection write SetSelection;
    property TabStops[Index: Longint]: Boolean read GetTabStops write
    SetTabStops;
    property TopRow: Longint read FTopLeft.Y write SetTopRow;
    property VisibleColCount: Integer read GetVisibleColCount;
    property VisibleRowCount: Integer read GetVisibleRowCount;

  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    function MouseCoord(X, Y: Integer): TGridCoord;
  published
    property TabStop default True;
  end;

  TGetEditEvent = procedure(Sender: TObject; ACol, ARow: Longint; var Value:
    string) of object;
  TSetEditEvent = procedure(Sender: TObject; ACol, ARow: Longint; const Value:
    string) of object;
  TMovedEvent = procedure(Sender: TObject; FromIndex, ToIndex: Longint) of
    object;

  TOnGetPickListItems = procedure(ACol, ARow: Integer; Items: TStrings) of
    object;

  TInplaceEditList = class(TInPlaceEdit)
  private
    FButtonWidth: Integer;
    FPickList: TCustomListbox;
    FActiveList: TWinControl;
    FEditStyle: TEditStyle;
    FDropDownRows: Integer;
    FListVisible: Boolean;
    FTracking: Boolean;
    FPressed: Boolean;
    FPickListLoaded: Boolean;
    FOnGetPickListitems: TOnGetPickListItems;
    FOnEditButtonClick: TNotifyEvent;
    FMouseInControl: Boolean;
    function GetPickList: TCustomListbox;
    procedure CMCancelMode(var Message: TCMCancelMode); message CM_CancelMode;
    procedure WMCancelMode(var Message: TMessage); message WM_CancelMode;
    procedure WMKillFocus(var Message: TMessage); message WM_KillFocus;
    procedure WMLButtonDblClk(var Message: TWMLButtonDblClk); message
      wm_LButtonDblClk;
    procedure WMPaint(var Message: TWMPaint); message wm_Paint;
    procedure WMSetCursor(var Message: TWMSetCursor); message WM_SetCursor;
    procedure CMMouseEnter(var Message: TMessage); message CM_MOUSEENTER;
    procedure CMMouseLeave(var Message: TMessage); message CM_MOUSELEAVE;
  protected

    procedure BoundsChanged; override;
    function ButtonRect: TRect;
    procedure CloseUp(Accept: Boolean); dynamic;
    procedure DblClick; override;
    procedure DoDropDownKeys(var Key: Word; Shift: TShiftState); virtual;
    procedure DoEditButtonClick; virtual;
    procedure DoGetPickListItems; dynamic;
    procedure DropDown; dynamic;
    procedure KeyDown(var Key: Word; Shift: TShiftState); override;
    procedure ListMouseUp(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure MouseDown(Button: TMouseButton; Shift: TShiftState;
      X, Y: Integer); override;
    procedure MouseMove(Shift: TShiftState; X, Y: Integer); override;
    procedure MouseUp(Button: TMouseButton; Shift: TShiftState;
      X, Y: Integer); override;
    function OverButton(const P: TPoint): Boolean;
    procedure PaintWindow(DC: HDC); override;