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https://gitlab.com/freepascal.org/lazarus/lazarus.git
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451 lines
14 KiB
ObjectPascal
451 lines
14 KiB
ObjectPascal
{ $Id$}
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{
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/***************************************************************************
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buttons.pp
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----------
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Component Library Code
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Initial Revision : Sun Mar 28 23:15:32 CST 1999
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Revised: Sat Jul 3 1999
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***************************************************************************/
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*****************************************************************************
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* *
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* This file is part of the Lazarus Component Library (LCL) *
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* *
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* See the file COPYING.modifiedLGPL, included in this distribution, *
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* for details about the copyright. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
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* *
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*****************************************************************************
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}
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unit Buttons;
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{$mode objfpc}{$H+}
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interface
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{$ifdef Trace}
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{$ASSERTIONS ON}
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{$endif}
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uses
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Types, Classes, SysUtils, LCLType, LCLProc, LCLIntf, LCLStrConsts,
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GraphType, Graphics, ImgList, ActnList, Controls, StdCtrls, lMessages, Forms,
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Menus {for ShortCut procedures};
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type
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{ TButton }
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TButtonLayout = (blGlyphLeft, blGlyphRight, blGlyphTop, blGlyphBottom);
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TButtonState = (
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bsUp, // button is up
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bsDisabled, // button disabled (grayed)
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bsDown, // button is down
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bsExclusive // button is the only up in his group
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);
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{TNumGlyphs holds the number of glyphs in an image.
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We restrict it to 4 to stay compatible but we don't NEED to.
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If we change this the code in SetNumGlyphs for @link(TCustomSpeedButton)
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needs to be changed }
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TNumGlyphs = 1..4;
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{ TCustomButton }
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TCustomButton = class(TButtonControl)
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private
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FCancel: Boolean;
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FDefault: Boolean;
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FActive: boolean;
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FModalResult: TModalResult;
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FShortCut: TShortcut;
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procedure SetCancel(NewCancel: boolean);
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procedure SetDefault(Value: Boolean);
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procedure SetModalResult(const AValue: TModalResult);
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procedure CMUIActivate(var Message: TLMessage); message CM_UIACTIVATE;
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procedure WMDefaultClicked(var Message: TLMessage); message LM_CLICKED;
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procedure WMKillFocus(var Message: TLMKillFocus); message LM_KILLFOCUS;
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protected
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procedure Click; override;
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procedure CreateWnd; override;
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procedure DoSendBtnDefault; virtual;
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procedure ControlKeyDown(var Key: Word; Shift: TShiftState); override;
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procedure ControlKeyUp(var Key: Word; Shift: TShiftState); override;
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procedure SetParent(AParent: TWinControl); override;
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procedure RealSetText(const Value: TCaption); override;
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function DialogChar(var Message: TLMKey): boolean; override;
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function ChildClassAllowed(ChildClass: TClass): boolean; override;
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function IsBorderSpacingInnerBorderStored: Boolean; override;
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property ParentColor default false;
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public
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constructor Create(TheOwner: TComponent); override;
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procedure ExecuteDefaultAction; override;
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procedure ExecuteCancelAction; override;
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procedure ActiveDefaultControlChanged(NewControl: TControl); override;
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procedure UpdateRolesForForm; override;
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public
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property Active: boolean read FActive stored false;
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property Default: Boolean read FDefault write SetDefault default false;
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property ModalResult: TModalResult read FModalResult write SetModalResult default mrNone;
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property Cancel: Boolean read FCancel write SetCancel default false;
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property Color default clBtnFace;
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property TabStop default true;
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end;
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{ TButton }
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TButton = class(TCustomButton)
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public
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procedure Click; override;
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published
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property Action;
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property Align;
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property Anchors;
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property AutoSize;
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property BorderSpacing;
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property Cancel;
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property Caption;
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property Color;
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property Constraints;
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property Default;
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property DragCursor;
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property DragMode;
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property Enabled;
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property Font;
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property ModalResult;
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property OnChangeBounds;
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property OnClick;
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property OnDragDrop;
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property OnDragOver;
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property OnEndDrag;
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property OnEnter;
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property OnExit;
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property OnKeyDown;
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property OnKeyPress;
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property OnKeyUp;
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property OnMouseDown;
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property OnMouseEnter;
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property OnMouseLeave;
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property OnMouseMove;
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property OnMouseUp;
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property OnResize;
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property OnStartDrag;
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property ParentFont;
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property ParentShowHint;
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property PopupMenu;
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property ShowHint;
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property TabOrder;
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property TabStop;
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property Visible;
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end;
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{ TButtonGlyph }
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TButtonGlyph = class
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private
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FOriginal: TBitmap;
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FNumGlyphs: TNumGlyphs;
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FOnChange: TNotifyEvent;
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procedure SetGlyph(Value: TBitmap);
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procedure SetNumGlyphs(Value: TNumGlyphs);
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protected
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procedure GlyphChanged(Sender: TObject);
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public
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constructor Create;
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destructor Destroy; override;
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function Draw(Canvas: TCanvas; const Client: TRect; const Offset: TPoint;
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State: TButtonState; Transparent: Boolean;
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BiDiFlags: Longint): TRect;
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property Glyph: TBitmap read FOriginal write SetGlyph;
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property NumGlyphs: TNumGlyphs read FNumGlyphs write SetNumGlyphs;
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public
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property OnChange: TNotifyEvent read FOnChange write FOnChange;
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end;
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{ TCustomBitBtn }
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// when adding items here, also update TBitBtn.GetCaptionOfKind
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TBitBtnKind = (bkCustom, bkOK, bkCancel, bkHelp, bkYes, bkNo,
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bkClose, bkAbort, bkRetry, bkIgnore, bkAll,
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bkNoToAll, bkYesToAll);
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TBitBtnKinds = set of TBitBtnKind;
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TCustomBitBtn = class(TCustomButton)
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private
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FButtonGlyph: TButtonGlyph;
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FKind: TBitBtnKind;
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FLayout: TButtonLayout;
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FMargin: integer;
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FSpacing: Integer;
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Function GetGlyph: TBitmap;
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function GetNumGlyphs: Integer;
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Function IsGlyphStored: Boolean;
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Procedure SetGlyph(AValue: TBitmap);
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Procedure SetKind(AValue: TBitBtnKind);
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Procedure SetLayout(AValue: TButtonLayout);
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procedure SetMargin(const AValue: integer);
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procedure SetNumGlyphs(AValue: Integer);
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Procedure SetSpacing(AValue: Integer);
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procedure RealizeKind;
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//Return the caption associated with the aKind value.
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function GetCaptionOfKind(aKind: TBitBtnKind): String;
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protected
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procedure ActionChange(Sender: TObject; CheckDefaults: Boolean); override;
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procedure GlyphChanged(Sender: TObject);
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procedure InitializeWnd; override;
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procedure TextChanged; override;
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function IsBorderSpacingInnerBorderStored: Boolean; override;
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public
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constructor Create(TheOwner: TComponent); override;
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destructor Destroy; Override;
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procedure Click; override;
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public
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property Glyph: TBitmap read GetGlyph write SetGlyph stored IsGlyphStored;
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property NumGlyphs: Integer read GetNumGlyphs write SetNumGlyphs default 1;
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property Kind: TBitBtnKind read FKind write SetKind default bkCustom;
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property Layout: TButtonLayout read FLayout write SetLayout default blGlyphLeft;
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property Margin: integer read FMargin write SetMargin default -1;
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property Spacing: Integer read FSpacing write SetSpacing default 3;
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end;
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{ TBitBtn }
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{ To set custom bitbtn glyphs for the whole application, see below for
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GetDefaultBitBtnGlyph }
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TBitBtn = class(TCustomBitBtn)
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published
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property Action;
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property Align;
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property Anchors;
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property AutoSize;
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property BorderSpacing;
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property Cancel;
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property Caption;
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property Color;
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property Constraints;
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property Default;
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property Enabled;
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property Font;
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property Glyph;
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property Kind;
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property Layout;
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property Margin;
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property ModalResult;
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property NumGlyphs;
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property OnChangeBounds;
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property OnClick;
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property OnEnter;
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property OnExit;
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property OnKeyDown;
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property OnKeyPress;
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property OnKeyUp;
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property OnMouseDown;
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property OnMouseMove;
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property OnMouseUp;
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property OnResize;
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property ParentShowHint;
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property PopupMenu;
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property ShowHint;
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property Spacing;
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property TabOrder;
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property TabStop;
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property Visible;
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end;
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{ TSpeedButtonActionLink }
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TSpeedButtonActionLink = class(TControlActionLink)
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protected
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procedure AssignClient(AClient: TObject); override;
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function IsCheckedLinked: Boolean; override;
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function IsGroupIndexLinked: Boolean; override;
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procedure SetGroupIndex(Value: Integer); override;
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procedure SetChecked(Value: Boolean); override;
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end;
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{ TCustomSpeedButton }
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TCustomSpeedButton = class(TGraphicControl)
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private
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FAllowAllUp: Boolean;
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FDown: Boolean;
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FDownBuffered : Boolean;//buffered value of FDown
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FDragging: Boolean;
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FFlat: Boolean;
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FGlyph: TButtonGlyph;
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FGroupIndex: Integer;
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FLastDrawFlags: integer;
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FLayout: TButtonLayout;
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FMargin: integer;
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FMouseInControl: Boolean;
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FShortcut: TShortCut;
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FShowAccelChar: boolean;
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FSpacing: integer;
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FTransparent: Boolean;
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function GetGlyph: TBitmap;
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procedure UpdateExclusive;
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procedure SetAllowAllUp(Value: Boolean);
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procedure SetGlyph(Value: TBitmap);
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procedure SetLayout(const Value: TButtonLayout);
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procedure SetShowAccelChar(Value: boolean);
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procedure SetTransparent(const Value: boolean);
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procedure CMButtonPressed(var Message: TLMessage); message CM_BUTTONPRESSED;
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procedure CMEnabledChanged(var Message: TLMessage); message CM_ENABLEDCHANGED;
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protected
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FState: TButtonState;
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function GetNumGlyphs: Integer;
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procedure GlyphChanged(Sender: TObject);
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function DialogChar(var Message: TLMKey): boolean; override;
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procedure MouseEnter; override;
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procedure MouseLeave; override;
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procedure MouseDown(Button: TMouseButton; Shift: TShiftState;
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X, Y: Integer); override;
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procedure MouseMove(Shift: TShiftState; X, Y: Integer); override;
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procedure MouseUp(Button: TMouseButton; Shift: TShiftState;
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X, Y: Integer); override;
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procedure Paint; override;
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procedure SetDown(Value: Boolean);
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procedure SetGroupIndex(const Value: Integer);
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procedure SetFlat(const Value: Boolean);
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procedure SetMargin(const Value: integer);
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procedure SetNumGlyphs(Value: integer);
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procedure SetSpacing(const Value: integer);
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procedure RealSetText(const Value: TCaption); override;
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procedure SetEnabled(NewEnabled: boolean); override;
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procedure UpdateState(InvalidateOnChange: boolean); virtual;
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function GetDrawFlags: integer; virtual;
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property MouseInControl: Boolean read FMouseInControl;
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procedure ActionChange(Sender: TObject; CheckDefaults: Boolean); override;
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function GetActionLinkClass: TControlActionLinkClass; override;
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procedure Loaded; override;
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protected
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function GetGlyphSize(PaintRect: TRect): TSize; virtual;
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function GetTextSize(PaintRect: TRect): TSize; virtual;
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function DrawGlyph(ACanvas: TCanvas; const AClient: TRect; const AOffset: TPoint;
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AState: TButtonState; ATransparent: Boolean; BiDiFlags: Longint): TRect; virtual;
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public
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constructor Create(AOwner: TComponent); override;
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destructor Destroy; override;
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function FindDownButton: TCustomSpeedButton;
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procedure Click; override; // make Click public
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public
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property AllowAllUp: Boolean read FAllowAllUp write SetAllowAllUp default false;
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property Down: Boolean read FDown write SetDown default false;
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property Flat: Boolean read FFlat write SetFlat default false;
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property Glyph: TBitmap read GetGlyph write SetGlyph;
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property GroupIndex: Integer read FGroupIndex write SetGroupIndex default 0;
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property Layout: TButtonLayout read FLayout write SetLayout default blGlyphLeft;
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property Margin: integer read FMargin write SetMargin default -1;
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property NumGlyphs: Integer read GetNumGlyphs write SetNumGlyphs default 1;
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property Spacing: integer read FSpacing write SetSpacing default 4;
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property ShowAccelChar: boolean read FShowAccelChar write SetShowAccelChar default true;
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property Transparent: Boolean read FTransparent write SetTransparent default true;
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end;
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{ TSpeedButton }
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TSpeedButton = class(TCustomSpeedButton)
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published
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property Action;
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property Align;
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property Anchors;
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property AllowAllUp;
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property BorderSpacing;
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property Constraints;
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property Caption;
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property Color;
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property Down;
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property Enabled;
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property Flat;
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property Font;
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property Glyph;
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property GroupIndex;
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property Layout;
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property Margin;
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property NumGlyphs;
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property Spacing;
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property Transparent;
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property Visible;
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property OnClick;
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property OnDblClick;
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property OnMouseDown;
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property OnMouseMove;
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property OnMouseUp;
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property OnPaint;
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property OnResize;
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property OnChangeBounds;
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property ShowHint;
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property ParentFont;
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property ParentShowHint;
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property PopupMenu;
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end;
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{ To override the default TBitBtn glyphs set GetDefaultBitBtnGlyph below.
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Example:
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function GetBitBtnGlyph(Kind: TBitBtnKind): TBitmap;
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begin
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if Kind in [bkOK, bkCancel] then begin
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Result:=TBitmap.Create;
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case Kind of
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bkOk: Result.Assign(MyOkGlyph);
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bkCancel: Result.Assign(MyCancelGlyph);
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end;
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end else
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Result:=nil;
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end;
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}
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type
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TGetDefaultBitBtnGlyph = function(Kind: TBitBtnKind): TBitmap;
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var
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GetDefaultBitBtnGlyph: TGetDefaultBitBtnGlyph = nil;
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procedure Register;
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implementation
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uses
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WSButtons;
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const
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BitBtnModalResults: array[TBitBtnKind] of TModalResult = (
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0, mrOK, mrCancel, 0, mrYes, mrNo,
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0, mrAbort, mrRetry, mrIgnore, mrAll,
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mrNoToAll, mrYesToAll);
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BitBtnImages: array[TBitBtnKind] of Longint = (
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idButtonOk, idButtonOk, idButtonCancel, idButtonHelp, idButtonYes,
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idButtonNo, idButtonClose, idButtonAbort, idButtonRetry, idButtonIgnore,
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idButtonAll, idButtonNoToAll, idButtonYesToAll);
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procedure Register;
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begin
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RegisterComponents('Standard',[TButton]);
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RegisterComponents('Additional',[TBitBtn,TSpeedButton]);
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end;
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{$I buttons.inc}
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{$I bitbtn.inc}
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{$I buttonglyph.inc}
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{$I speedbutton.inc}
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end.
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