bsdbctrls.pas

Delphi开发的图象处理软件

    procedure CMExit(var Message: TCMExit); message CM_EXIT;
  protected
    procedure Change; dynamic;
    procedure Click; override;
    procedure KeyPress(var Key: Char); override;
    function CanModify: Boolean; override;
    procedure Notification(AComponent: TComponent;
      Operation: TOperation); override;
    property DataLink: TFieldDataLink read FDataLink;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    function ExecuteAction(Action: TBasicAction): Boolean; override;
    function UpdateAction(Action: TBasicAction): Boolean; override;
    function UseRightToLeftAlignment: Boolean; override;
    property Field: TField read GetField;
    property ItemIndex;
    property Value: string read FValue write SetValue;
  published
    property Align;
    property Anchors;
    property BiDiMode;
    property Caption;
    property Color;
    property Columns;
    property Constraints;
    property Ctl3D;
    property DataField: string read GetDataField write SetDataField;
    property DataSource: TDataSource read GetDataSource write SetDataSource;
    property DragCursor;
    property DragKind;
    property DragMode;
    property Enabled;
    property Font;
    property Items write SetItems;
    property ParentBiDiMode;
    property ParentColor;
    property ParentCtl3D;
    property ParentFont;
    property ParentShowHint;
    property PopupMenu;
    property ReadOnly: Boolean read GetReadOnly write SetReadOnly default False;
    property ShowHint;
    property TabOrder;
    property TabStop;
    property Values: TStrings read FValues write SetValues;
    property Visible;
    property OnChange: TNotifyEvent read FOnChange write FOnChange;
    property OnClick;
    property OnContextPopup;
    property OnDragDrop;
    property OnDragOver;
    property OnEndDock;
    property OnEndDrag;
    property OnEnter;
    property OnExit;
    property OnStartDock;
    property OnStartDrag;
  end;

  { TbsDBLookupControl }

  TbsDBLookupControl = class;

  TbsDataSourceLink = class(TDataLink)
  private
    FDBLookupControl: TbsDBLookupControl;
  protected
    procedure FocusControl(Field: TFieldRef); override;
    procedure ActiveChanged; override;
    procedure LayoutChanged; override;
    procedure RecordChanged(Field: TField); override;
  public
    constructor Create;
  end;

  TbsListSourceLink = class(TDataLink)
  private
    FDBLookupControl: TbsDBLookupControl;
  protected
    procedure ActiveChanged; override;
    procedure DataSetChanged; override;
    procedure LayoutChanged; override;
  public
    constructor Create;
  end;

  TbsDBLookupControl = class(TbsSkinCustomControl)
  private
    FLookupSource: TDataSource;
    FDataLink: TbsDataSourceLink;
    FListLink: TbsListSourceLink;
    FDataFieldName: string;
    FKeyFieldName: string;
    FListFieldName: string;
    FListFieldIndex: Integer;
    FDataField: TField;
    FMasterField: TField;
    FKeyField: TField;
    FListField: TField;
    FListFields: TList;
    FKeyValue: Variant;
    FSearchText: string;
    FLookupMode: Boolean;
    FListActive: Boolean;
    FHasFocus: Boolean;
    FNullValueKey: TShortCut;
    procedure CheckNotCircular;
    procedure CheckNotLookup;
    procedure DataLinkRecordChanged(Field: TField);
    function GetDataSource: TDataSource;
    function GetKeyFieldName: string;
    function GetListSource: TDataSource;
    function GetReadOnly: Boolean;
    procedure SetDataFieldName(const Value: string);
    procedure SetDataSource(Value: TDataSource);
    procedure SetKeyFieldName(const Value: string);
    procedure SetKeyValue(const Value: Variant);
    procedure SetListFieldName(const Value: string);
    procedure SetListSource(Value: TDataSource);
    procedure SetLookupMode(Value: Boolean);
    procedure SetReadOnly(Value: Boolean);
    procedure WMGetDlgCode(var Message: TMessage); message WM_GETDLGCODE;
    procedure WMKeyDown(var Message: TWMKeyDown); message WM_KEYDOWN;    
    procedure WMKillFocus(var Message: TMessage); message WM_KILLFOCUS;
    procedure WMSetFocus(var Message: TMessage); message WM_SETFOCUS;
    procedure CMEnabledChanged(var Message: TMessage); message CM_ENABLEDCHANGED;
    procedure CMGetDataLink(var Message: TMessage); message CM_GETDATALINK;
  protected
    function CanModify: Boolean; virtual;
    procedure KeyValueChanged; virtual;
    procedure ListLinkDataChanged; virtual;
    function LocateKey: Boolean; virtual;
    procedure Notification(AComponent: TComponent;
      Operation: TOperation); override;
    procedure ProcessSearchKey(Key: Char); virtual;
    procedure SelectKeyValue(const Value: Variant); virtual;
    procedure UpdateDataFields; virtual;
    procedure UpdateListFields; virtual;
    property DataField: string read FDataFieldName write SetDataFieldName;
    property DataLink: TbsDataSourceLink read FDataLink;
    property DataSource: TDataSource read GetDataSource write SetDataSource;
    property HasFocus: Boolean read FHasFocus;
    property KeyField: string read GetKeyFieldName write SetKeyFieldName;
    property KeyValue: Variant read FKeyValue write SetKeyValue;
    property ListActive: Boolean read FListActive;
    property ListField: string read FListFieldName write SetListFieldName;
    property ListFieldIndex: Integer read FListFieldIndex write FListFieldIndex default 0;
    property ListFields: TList read FListFields;
    property ListLink: TbsListSourceLink read FListLink;
    property ListSource: TDataSource read GetListSource write SetListSource;
    property NullValueKey: TShortCut read FNullValueKey write FNullValueKey default 0;
    property ParentColor default False;
    property ReadOnly: Boolean read GetReadOnly write SetReadOnly default False;
    property SearchText: string read FSearchText write FSearchText;
    property TabStop default True;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    function ExecuteAction(Action: TBasicAction): Boolean; override;
    function UpdateAction(Action: TBasicAction): Boolean; override;
    property Field: TField read FDataField;
  end;

{ TbsSkinDBLookupListBox }

  TbsSkinDBLookupListBox = class(TbsDBLookupControl)
  private
    FStopThumbScroll: Boolean;
    FDefaultItemHeight: Integer;
    FRecordIndex: Integer;
    FRecordCount: Integer;
    FRowCount: Integer;
    FBorderStyle: TBorderStyle;
    FPopup: Boolean;
    FKeySelected: Boolean;
    FTracking: Boolean;
    FTimerActive: Boolean;
    FLockPosition: Boolean;
    FMousePos: Integer;
    FSelectedItem: string;

    procedure ShowScrollBar;
    procedure HideScrollBar;
    procedure AlignScrollBar;

    procedure SetDefaultItemHeight(Value: Integer);
    function GetKeyIndex: Integer;
    procedure SelectCurrent;
    procedure SelectItemAt(X, Y: Integer);
    procedure SetBorderStyle(Value: TBorderStyle);
    procedure SetRowCount(Value: Integer);
    procedure StopTimer;
    procedure StopTracking;
    procedure TimerScroll;
    procedure UpdateScrollBar;
    procedure CMFontChanged(var Message: TMessage); message CM_FONTCHANGED;
    procedure WMCancelMode(var Message: TMessage); message WM_CANCELMODE;
    procedure WMTimer(var Message: TMessage); message WM_TIMER;
    procedure WMVScroll(var Message: TWMVScroll); message WM_VSCROLL;
    procedure OnScrollBarChange(Sender: TObject);
    procedure OnScrollBarUpButtonClick(Sender: TObject);
    procedure OnScrollBarDownButtonClick(Sender: TObject);
  protected
    procedure FramePaint(C: TCanvas);
    procedure WMNCCALCSIZE(var Message: TWMNCCalcSize); message WM_NCCALCSIZE;
    procedure WMNCPAINT(var Message: TMessage); message WM_NCPAINT;
    procedure CreateParams(var Params: TCreateParams); override;
    procedure CreateWnd; override;
    procedure KeyDown(var Key: Word; Shift: TShiftState); override;
    procedure KeyPress(var Key: Char); override;
    procedure KeyValueChanged; override;
    procedure ListLinkDataChanged; 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 CreateControlDefaultImage(B: TBitMap); override;
    procedure CreateControlSkinImage(B: TBitMap); override;

    procedure UpdateListFields; override;

    procedure GetSkinData; override;
    function GetItemHeight: Integer;
    function GetBorderHeight: Integer;
    function GetItemWidth: Integer;
  public
    FScrollBar: TbsSkinScrollBar;
    FontName: String;
    FontStyle: TFontStyles;
    FontHeight: Integer;
    SItemRect, ActiveItemRect, FocusItemRect: TRect;
    ItemLeftOffset, ItemRightOffset: Integer;
    ItemTextRect: TRect;
    FontColor, ActiveFontColor, FocusFontColor: TColor;
    ScrollBarName: String;
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    function ExecuteAction(Action: TBasicAction): Boolean; override;
    function UpdateAction(Action: TBasicAction): Boolean; override;
    function UseRightToLeftAlignment: Boolean; override;
    property KeyValue;
    property SelectedItem: string read FSelectedItem;
    procedure SetBounds(ALeft, ATop, AWidth, AHeight: Integer); override;
    procedure ChangeSkinData; override;
  published
    property Align;
    property Anchors;
    property BiDiMode;
    property Constraints;
    property DataField;
    property DataSource;
    property DragCursor;
    property DragKind;
    property DragMode;
    property Enabled;
    property Font;
    property ImeMode;
    property ImeName;
    property KeyField;
    property ListField;
    property ListFieldIndex;
    property ListSource;
    property NullValueKey;
    property ParentBiDiMode;
    property ParentColor;
    property ParentCtl3D;
    property ParentFont;
    property ParentShowHint;
    property PopupMenu;
    property ReadOnly;
    property RowCount: Integer read FRowCount write SetRowCount;
    property DefaultItemHeight: Integer read FDefaultItemHeight
                                        write SetDefaultItemHeight;
    property ShowHint;
    property TabOrder;
    property TabStop;
    property Visible;
    property OnClick;
    property OnContextPopup;
    property OnDblClick;
    property OnDragDrop;
    property OnDragOver;
    property OnEndDock;
    property OnEndDrag;
    property OnEnter;
    property OnExit;
    property OnKeyDown;
    property OnKeyPress;
    property OnKeyUp;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnStartDock;
    property OnStartDrag;
  end;

  { TDBLookupComboBox }

  TbsPopupDataList = class(TbsSkinDBLookupListBox)
  private
    procedure WMMouseActivate(var Message: TMessage); message WM_MOUSEACTIVATE;
  protected
    procedure CreateParams(var Params: TCreateParams); override;
  public
    constructor Create(AOwner: TComponent); override;
  end;

  TDropDownAlign = (daLeft, daRight, daCenter);

  TbsSkinDBLookupComboBox = class(TbsDBLookupControl)
  private
    FButtonRect, FItemRect: TRect;
    FDataList: TbsPopupDataList;
    FButtonWidth: Integer;
    FText: string;
    FDropDownRows: Integer;
    FDropDownWidth: Integer;
    FDropDownAlign: TDropDownAlign;
    FListVisible: Boolean;
    FPressed: Boolean;
    FMouseIn: Boolean;
    FTracking: Boolean;
    FAlignment: TAlignment;
    FLookupMode: Boolean;
    FOnDropDown: TNotifyEvent;
    FOnCloseUp: TNotifyEvent;

    FOnChange: TNotifyEvent;

    procedure ListMouseUp(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure StopTracking;
    procedure TrackButton(X, Y: Integer);
    procedure CMDialogKey(var Message: TCMDialogKey); message CM_DIALOGKEY;
    procedure CMCancelMode(var Message: TCMCancelMode); message CM_CANCELMODE;
    procedure CMFontChanged(var Message: TMessage); message CM_FONTCHANGED;
    procedure CMGetDataLink(var Message: TMessage); message CM_GETDATALINK;
    procedure WMCancelMode(var Message: TMessage); message WM_CANCELMODE;
    procedure WMKillFocus(var Message: TWMKillFocus); message WM_KILLFOCUS;
  protected
    procedure CreateParams(var Params: TCreateParams); override;
    procedure KeyDown(var Key: Word; Shift: TShiftState); override;
    procedure KeyPress(var Key: Char); override;
    procedure KeyValueChanged; 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 UpdateListFields; override;
    procedure CreateControlDefaultImage(B: TBitMap); override;
    procedure CreateControlSkinImage(B: TBitMap); override;
    procedure GetSkinData; override;
  public
    FontName: String;
    FontStyle: TFontStyles;
    FontHeight: Integer;
    SItemRect, FocusItemRect: TRect;
    ItemLeftOffset, ItemRightOffset: Integer;
    ItemTextRect: TRect;
    FontColor, FocusFontColor: TColor;
    ButtonRect,
    ActiveButtonRect,
    DownButtonRect: TRect;
    ListBoxName: String;
    constructor Create(AOwner: TComponent); override;
    procedure CloseUp(Accept: Boolean); virtual;
    procedure DropDown; virtual;